./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/unroll-2.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/unroll-2.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 5393d9cf3b7cc0865f031a716dd61208c034931418b29464b30da9c6eaf669bf --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 01:18:50,724 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 01:18:50,733 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 01:18:50,763 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 01:18:50,764 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 01:18:50,767 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 01:18:50,769 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 01:18:50,771 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 01:18:50,773 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 01:18:50,779 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 01:18:50,779 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 01:18:50,782 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 01:18:50,782 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 01:18:50,784 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 01:18:50,785 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 01:18:50,790 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 01:18:50,791 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 01:18:50,792 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 01:18:50,794 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 01:18:50,798 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 01:18:50,799 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 01:18:50,800 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 01:18:50,801 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 01:18:50,802 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 01:18:50,808 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 01:18:50,808 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 01:18:50,809 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 01:18:50,810 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 01:18:50,810 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 01:18:50,811 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 01:18:50,812 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 01:18:50,813 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 01:18:50,814 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 01:18:50,815 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 01:18:50,816 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 01:18:50,816 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 01:18:50,816 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 01:18:50,817 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 01:18:50,817 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 01:18:50,818 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 01:18:50,818 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 01:18:50,819 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-30 01:18:50,856 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 01:18:50,856 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 01:18:50,857 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 01:18:50,857 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 01:18:50,858 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 01:18:50,858 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 01:18:50,859 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 01:18:50,859 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 01:18:50,859 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 01:18:50,859 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 01:18:50,860 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 01:18:50,860 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 01:18:50,860 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 01:18:50,861 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 01:18:50,861 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 01:18:50,861 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 01:18:50,861 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 01:18:50,861 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 01:18:50,861 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 01:18:50,862 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 01:18:50,862 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 01:18:50,862 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 01:18:50,862 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 01:18:50,862 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 01:18:50,862 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 01:18:50,863 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 01:18:50,863 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 01:18:50,863 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 01:18:50,863 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 01:18:50,863 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 01:18:50,864 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 01:18:50,864 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 01:18:50,864 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 01:18:50,864 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 01:18:50,864 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5393d9cf3b7cc0865f031a716dd61208c034931418b29464b30da9c6eaf669bf Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 01:18:51,142 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 01:18:51,160 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 01:18:51,163 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 01:18:51,164 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 01:18:51,164 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 01:18:51,165 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/unroll-2.wvr.c [2023-08-30 01:18:52,301 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 01:18:52,475 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 01:18:52,476 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/unroll-2.wvr.c [2023-08-30 01:18:52,490 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/32ca1c70c/12425b49d5104e81860cc78b446099d8/FLAG015255e00 [2023-08-30 01:18:52,520 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/32ca1c70c/12425b49d5104e81860cc78b446099d8 [2023-08-30 01:18:52,522 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 01:18:52,523 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 01:18:52,526 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 01:18:52,526 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 01:18:52,528 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 01:18:52,529 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 01:18:52" (1/1) ... [2023-08-30 01:18:52,530 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@59c1fc7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 01:18:52, skipping insertion in model container [2023-08-30 01:18:52,530 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 01:18:52" (1/1) ... [2023-08-30 01:18:52,535 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 01:18:52,556 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 01:18:52,726 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/unroll-2.wvr.c[2428,2441] [2023-08-30 01:18:52,741 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 01:18:52,749 ERROR L324 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2023-08-30 01:18:52,751 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@7b5d509e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 01:18:52, skipping insertion in model container [2023-08-30 01:18:52,751 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 01:18:52,752 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-08-30 01:18:52,754 INFO L158 Benchmark]: Toolchain (without parser) took 229.56ms. Allocated memory is still 62.9MB. Free memory was 43.8MB in the beginning and 34.2MB in the end (delta: 9.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-08-30 01:18:52,754 INFO L158 Benchmark]: CDTParser took 0.20ms. Allocated memory is still 62.9MB. Free memory is still 40.2MB. There was no memory consumed. Max. memory is 16.1GB. [2023-08-30 01:18:52,755 INFO L158 Benchmark]: CACSL2BoogieTranslator took 226.25ms. Allocated memory is still 62.9MB. Free memory was 43.6MB in the beginning and 34.2MB in the end (delta: 9.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-08-30 01:18:52,756 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20ms. Allocated memory is still 62.9MB. Free memory is still 40.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 226.25ms. Allocated memory is still 62.9MB. Free memory was 43.6MB in the beginning and 34.2MB in the end (delta: 9.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 97]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/unroll-2.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 5393d9cf3b7cc0865f031a716dd61208c034931418b29464b30da9c6eaf669bf --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 01:18:54,375 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 01:18:54,376 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 01:18:54,417 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 01:18:54,418 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 01:18:54,420 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 01:18:54,422 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 01:18:54,425 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 01:18:54,427 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 01:18:54,431 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 01:18:54,432 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 01:18:54,434 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 01:18:54,435 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 01:18:54,437 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 01:18:54,438 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 01:18:54,443 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 01:18:54,444 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 01:18:54,445 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 01:18:54,447 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 01:18:54,453 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 01:18:54,454 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 01:18:54,455 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 01:18:54,456 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 01:18:54,457 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 01:18:54,463 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 01:18:54,464 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 01:18:54,464 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 01:18:54,466 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 01:18:54,466 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 01:18:54,467 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 01:18:54,467 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 01:18:54,468 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 01:18:54,470 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 01:18:54,471 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 01:18:54,471 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 01:18:54,471 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 01:18:54,472 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 01:18:54,472 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 01:18:54,472 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 01:18:54,473 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 01:18:54,474 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 01:18:54,475 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-08-30 01:18:54,513 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 01:18:54,513 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 01:18:54,515 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 01:18:54,515 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 01:18:54,516 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 01:18:54,516 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 01:18:54,516 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 01:18:54,517 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 01:18:54,517 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 01:18:54,517 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 01:18:54,518 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 01:18:54,518 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 01:18:54,518 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 01:18:54,518 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 01:18:54,518 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 01:18:54,519 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 01:18:54,519 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 01:18:54,519 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 01:18:54,519 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 01:18:54,519 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 01:18:54,520 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-08-30 01:18:54,520 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-08-30 01:18:54,520 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 01:18:54,520 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 01:18:54,520 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 01:18:54,521 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 01:18:54,521 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 01:18:54,521 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 01:18:54,521 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 01:18:54,521 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 01:18:54,522 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-08-30 01:18:54,522 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-08-30 01:18:54,522 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 01:18:54,522 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 01:18:54,522 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 01:18:54,523 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-08-30 01:18:54,523 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 01:18:54,523 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5393d9cf3b7cc0865f031a716dd61208c034931418b29464b30da9c6eaf669bf Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 01:18:54,825 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 01:18:54,840 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 01:18:54,842 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 01:18:54,843 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 01:18:54,844 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 01:18:54,845 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/unroll-2.wvr.c [2023-08-30 01:18:56,067 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 01:18:56,248 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 01:18:56,248 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/unroll-2.wvr.c [2023-08-30 01:18:56,254 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4e24c2dbc/79a259a45d894058ba6d8b4b39bf8ea6/FLAG08e433fdf [2023-08-30 01:18:56,264 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4e24c2dbc/79a259a45d894058ba6d8b4b39bf8ea6 [2023-08-30 01:18:56,267 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 01:18:56,268 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 01:18:56,269 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 01:18:56,269 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 01:18:56,271 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 01:18:56,272 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 01:18:56" (1/1) ... [2023-08-30 01:18:56,273 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@76863409 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 01:18:56, skipping insertion in model container [2023-08-30 01:18:56,273 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 01:18:56" (1/1) ... [2023-08-30 01:18:56,278 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 01:18:56,294 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 01:18:56,477 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/unroll-2.wvr.c[2428,2441] [2023-08-30 01:18:56,489 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 01:18:56,509 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-08-30 01:18:56,517 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 01:18:56,543 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/unroll-2.wvr.c[2428,2441] [2023-08-30 01:18:56,551 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 01:18:56,560 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 01:18:56,595 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/unroll-2.wvr.c[2428,2441] [2023-08-30 01:18:56,601 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 01:18:56,619 INFO L208 MainTranslator]: Completed translation [2023-08-30 01:18:56,619 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 01:18:56 WrapperNode [2023-08-30 01:18:56,619 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 01:18:56,624 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 01:18:56,625 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 01:18:56,625 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 01:18:56,630 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 01:18:56" (1/1) ... [2023-08-30 01:18:56,650 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 01:18:56" (1/1) ... [2023-08-30 01:18:56,678 INFO L138 Inliner]: procedures = 26, calls = 32, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 135 [2023-08-30 01:18:56,678 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 01:18:56,680 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 01:18:56,680 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 01:18:56,680 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 01:18:56,688 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 01:18:56" (1/1) ... [2023-08-30 01:18:56,689 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 01:18:56" (1/1) ... [2023-08-30 01:18:56,702 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 01:18:56" (1/1) ... [2023-08-30 01:18:56,703 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 01:18:56" (1/1) ... [2023-08-30 01:18:56,712 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 01:18:56" (1/1) ... [2023-08-30 01:18:56,723 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 01:18:56" (1/1) ... [2023-08-30 01:18:56,725 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 01:18:56" (1/1) ... [2023-08-30 01:18:56,733 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 01:18:56" (1/1) ... [2023-08-30 01:18:56,735 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 01:18:56,737 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 01:18:56,737 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 01:18:56,738 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 01:18:56,738 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 01:18:56" (1/1) ... [2023-08-30 01:18:56,743 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 01:18:56,754 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 01:18:56,765 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-30 01:18:56,786 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-30 01:18:56,800 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 01:18:56,800 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-08-30 01:18:56,800 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 01:18:56,800 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-08-30 01:18:56,800 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 01:18:56,801 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 01:18:56,801 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 01:18:56,801 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 01:18:56,801 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-30 01:18:56,801 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 01:18:56,801 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 01:18:56,802 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 01:18:56,802 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-08-30 01:18:56,803 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-30 01:18:56,912 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 01:18:56,913 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 01:18:57,237 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 01:18:57,244 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 01:18:57,244 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-30 01:18:57,246 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 01:18:57 BoogieIcfgContainer [2023-08-30 01:18:57,246 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 01:18:57,248 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 01:18:57,248 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 01:18:57,250 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 01:18:57,251 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 01:18:56" (1/3) ... [2023-08-30 01:18:57,251 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ae2679f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 01:18:57, skipping insertion in model container [2023-08-30 01:18:57,251 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 01:18:56" (2/3) ... [2023-08-30 01:18:57,252 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ae2679f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 01:18:57, skipping insertion in model container [2023-08-30 01:18:57,252 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 01:18:57" (3/3) ... [2023-08-30 01:18:57,253 INFO L112 eAbstractionObserver]: Analyzing ICFG unroll-2.wvr.c [2023-08-30 01:18:57,267 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 01:18:57,267 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 18 error locations. [2023-08-30 01:18:57,267 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 01:18:57,352 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-30 01:18:57,382 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 168 places, 175 transitions, 366 flow [2023-08-30 01:18:57,477 INFO L130 PetriNetUnfolder]: 14/173 cut-off events. [2023-08-30 01:18:57,478 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 01:18:57,484 INFO L83 FinitePrefix]: Finished finitePrefix Result has 182 conditions, 173 events. 14/173 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 229 event pairs, 0 based on Foata normal form. 0/141 useless extension candidates. Maximal degree in co-relation 107. Up to 2 conditions per place. [2023-08-30 01:18:57,484 INFO L82 GeneralOperation]: Start removeDead. Operand has 168 places, 175 transitions, 366 flow [2023-08-30 01:18:57,488 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 162 places, 169 transitions, 350 flow [2023-08-30 01:18:57,491 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 01:18:57,498 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 162 places, 169 transitions, 350 flow [2023-08-30 01:18:57,500 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 162 places, 169 transitions, 350 flow [2023-08-30 01:18:57,501 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 162 places, 169 transitions, 350 flow [2023-08-30 01:18:57,534 INFO L130 PetriNetUnfolder]: 14/169 cut-off events. [2023-08-30 01:18:57,534 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 01:18:57,535 INFO L83 FinitePrefix]: Finished finitePrefix Result has 178 conditions, 169 events. 14/169 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 228 event pairs, 0 based on Foata normal form. 0/138 useless extension candidates. Maximal degree in co-relation 107. Up to 2 conditions per place. [2023-08-30 01:18:57,537 INFO L119 LiptonReduction]: Number of co-enabled transitions 2778 [2023-08-30 01:19:09,709 INFO L134 LiptonReduction]: Checked pairs total: 2716 [2023-08-30 01:19:09,709 INFO L136 LiptonReduction]: Total number of compositions: 184 [2023-08-30 01:19:09,721 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 01:19:09,727 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;@6d8e4069, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 01:19:09,727 INFO L358 AbstractCegarLoop]: Starting to check reachability of 26 error locations. [2023-08-30 01:19:09,730 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-08-30 01:19:09,730 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 01:19:09,730 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:19:09,731 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 01:19:09,731 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-08-30 01:19:09,735 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:19:09,735 INFO L85 PathProgramCache]: Analyzing trace with hash 21819, now seen corresponding path program 1 times [2023-08-30 01:19:09,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:19:09,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1140067566] [2023-08-30 01:19:09,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 01:19:09,751 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:19:09,751 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:19:09,757 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 01:19:09,765 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-08-30 01:19:09,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 01:19:09,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 01:19:09,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:19:09,909 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-08-30 01:19:09,910 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2023-08-30 01:19:09,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 01:19:09,928 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 01:19:09,928 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:19:09,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1140067566] [2023-08-30 01:19:09,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1140067566] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 01:19:09,929 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 01:19:09,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 01:19:09,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226383158] [2023-08-30 01:19:09,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 01:19:09,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 01:19:09,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:19:09,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 01:19:09,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 01:19:10,083 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 359 [2023-08-30 01:19:10,086 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 34 transitions, 80 flow. Second operand has 3 states, 3 states have (on average 153.66666666666666) internal successors, (461), 3 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:19:10,087 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:19:10,087 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 359 [2023-08-30 01:19:10,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:19:10,273 INFO L130 PetriNetUnfolder]: 398/569 cut-off events. [2023-08-30 01:19:10,273 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2023-08-30 01:19:10,274 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1156 conditions, 569 events. 398/569 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 2309 event pairs, 184 based on Foata normal form. 0/140 useless extension candidates. Maximal degree in co-relation 997. Up to 564 conditions per place. [2023-08-30 01:19:10,278 INFO L137 encePairwiseOnDemand]: 355/359 looper letters, 28 selfloop transitions, 1 changer transitions 0/31 dead transitions. [2023-08-30 01:19:10,278 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 31 transitions, 132 flow [2023-08-30 01:19:10,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 01:19:10,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 01:19:10,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 491 transitions. [2023-08-30 01:19:10,291 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4558960074280409 [2023-08-30 01:19:10,292 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 491 transitions. [2023-08-30 01:19:10,292 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 491 transitions. [2023-08-30 01:19:10,294 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:19:10,296 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 491 transitions. [2023-08-30 01:19:10,299 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 163.66666666666666) internal successors, (491), 3 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:19:10,303 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 359.0) internal successors, (1436), 4 states have internal predecessors, (1436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:19:10,304 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 359.0) internal successors, (1436), 4 states have internal predecessors, (1436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:19:10,306 INFO L175 Difference]: Start difference. First operand has 38 places, 34 transitions, 80 flow. Second operand 3 states and 491 transitions. [2023-08-30 01:19:10,306 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 31 transitions, 132 flow [2023-08-30 01:19:10,309 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 31 transitions, 124 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-30 01:19:10,310 INFO L231 Difference]: Finished difference. Result has 33 places, 31 transitions, 68 flow [2023-08-30 01:19:10,311 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=359, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=68, PETRI_PLACES=33, PETRI_TRANSITIONS=31} [2023-08-30 01:19:10,314 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -5 predicate places. [2023-08-30 01:19:10,314 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 31 transitions, 68 flow [2023-08-30 01:19:10,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 153.66666666666666) internal successors, (461), 3 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:19:10,315 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:19:10,315 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 01:19:10,334 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2023-08-30 01:19:10,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:19:10,532 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-08-30 01:19:10,532 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:19:10,532 INFO L85 PathProgramCache]: Analyzing trace with hash 21880, now seen corresponding path program 1 times [2023-08-30 01:19:10,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:19:10,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [846266479] [2023-08-30 01:19:10,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 01:19:10,533 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:19:10,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:19:10,535 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 01:19:10,539 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-08-30 01:19:10,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 01:19:10,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 01:19:10,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:19:10,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 01:19:10,648 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 01:19:10,649 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:19:10,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [846266479] [2023-08-30 01:19:10,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [846266479] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 01:19:10,650 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 01:19:10,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 01:19:10,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204010327] [2023-08-30 01:19:10,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 01:19:10,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 01:19:10,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:19:10,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 01:19:10,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 01:19:10,692 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 359 [2023-08-30 01:19:10,693 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 31 transitions, 68 flow. Second operand has 3 states, 3 states have (on average 155.66666666666666) internal successors, (467), 3 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:19:10,693 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:19:10,694 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 359 [2023-08-30 01:19:10,694 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:19:10,902 INFO L130 PetriNetUnfolder]: 398/571 cut-off events. [2023-08-30 01:19:10,902 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 01:19:10,906 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1147 conditions, 571 events. 398/571 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 2323 event pairs, 184 based on Foata normal form. 0/141 useless extension candidates. Maximal degree in co-relation 1141. Up to 565 conditions per place. [2023-08-30 01:19:10,909 INFO L137 encePairwiseOnDemand]: 354/359 looper letters, 29 selfloop transitions, 2 changer transitions 0/33 dead transitions. [2023-08-30 01:19:10,909 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 33 transitions, 134 flow [2023-08-30 01:19:10,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 01:19:10,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 01:19:10,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 499 transitions. [2023-08-30 01:19:10,914 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46332404828226553 [2023-08-30 01:19:10,914 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 499 transitions. [2023-08-30 01:19:10,914 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 499 transitions. [2023-08-30 01:19:10,915 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:19:10,915 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 499 transitions. [2023-08-30 01:19:10,916 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 166.33333333333334) internal successors, (499), 3 states have internal predecessors, (499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:19:10,919 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 359.0) internal successors, (1436), 4 states have internal predecessors, (1436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:19:10,920 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 359.0) internal successors, (1436), 4 states have internal predecessors, (1436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:19:10,920 INFO L175 Difference]: Start difference. First operand has 33 places, 31 transitions, 68 flow. Second operand 3 states and 499 transitions. [2023-08-30 01:19:10,920 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 33 transitions, 134 flow [2023-08-30 01:19:10,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 33 transitions, 133 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 01:19:10,922 INFO L231 Difference]: Finished difference. Result has 35 places, 32 transitions, 83 flow [2023-08-30 01:19:10,922 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=359, PETRI_DIFFERENCE_MINUEND_FLOW=67, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=83, PETRI_PLACES=35, PETRI_TRANSITIONS=32} [2023-08-30 01:19:10,923 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -3 predicate places. [2023-08-30 01:19:10,923 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 32 transitions, 83 flow [2023-08-30 01:19:10,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 155.66666666666666) internal successors, (467), 3 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:19:10,924 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:19:10,924 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 01:19:10,937 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2023-08-30 01:19:11,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:19:11,133 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-08-30 01:19:11,134 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:19:11,134 INFO L85 PathProgramCache]: Analyzing trace with hash 21820, now seen corresponding path program 1 times [2023-08-30 01:19:11,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:19:11,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [925642878] [2023-08-30 01:19:11,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 01:19:11,135 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:19:11,135 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:19:11,136 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 01:19:11,139 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-08-30 01:19:11,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 01:19:11,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 01:19:11,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:19:11,274 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-30 01:19:11,274 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-30 01:19:11,297 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 01:19:11,297 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 01:19:11,297 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:19:11,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [925642878] [2023-08-30 01:19:11,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [925642878] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 01:19:11,297 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 01:19:11,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 01:19:11,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251368540] [2023-08-30 01:19:11,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 01:19:11,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 01:19:11,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:19:11,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 01:19:11,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 01:19:11,434 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 359 [2023-08-30 01:19:11,435 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 32 transitions, 83 flow. Second operand has 3 states, 3 states have (on average 153.66666666666666) internal successors, (461), 3 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:19:11,435 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:19:11,435 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 359 [2023-08-30 01:19:11,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:19:11,647 INFO L130 PetriNetUnfolder]: 398/570 cut-off events. [2023-08-30 01:19:11,647 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 01:19:11,648 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1153 conditions, 570 events. 398/570 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 2285 event pairs, 184 based on Foata normal form. 1/143 useless extension candidates. Maximal degree in co-relation 1145. Up to 565 conditions per place. [2023-08-30 01:19:11,651 INFO L137 encePairwiseOnDemand]: 356/359 looper letters, 28 selfloop transitions, 2 changer transitions 0/32 dead transitions. [2023-08-30 01:19:11,651 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 32 transitions, 143 flow [2023-08-30 01:19:11,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 01:19:11,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 01:19:11,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 490 transitions. [2023-08-30 01:19:11,653 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45496750232126276 [2023-08-30 01:19:11,653 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 490 transitions. [2023-08-30 01:19:11,653 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 490 transitions. [2023-08-30 01:19:11,653 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:19:11,653 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 490 transitions. [2023-08-30 01:19:11,655 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 163.33333333333334) internal successors, (490), 3 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:19:11,657 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 359.0) internal successors, (1436), 4 states have internal predecessors, (1436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:19:11,657 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 359.0) internal successors, (1436), 4 states have internal predecessors, (1436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:19:11,657 INFO L175 Difference]: Start difference. First operand has 35 places, 32 transitions, 83 flow. Second operand 3 states and 490 transitions. [2023-08-30 01:19:11,658 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 32 transitions, 143 flow [2023-08-30 01:19:11,658 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 32 transitions, 139 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-30 01:19:11,659 INFO L231 Difference]: Finished difference. Result has 37 places, 32 transitions, 87 flow [2023-08-30 01:19:11,659 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=359, PETRI_DIFFERENCE_MINUEND_FLOW=79, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=87, PETRI_PLACES=37, PETRI_TRANSITIONS=32} [2023-08-30 01:19:11,660 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -1 predicate places. [2023-08-30 01:19:11,660 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 32 transitions, 87 flow [2023-08-30 01:19:11,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 153.66666666666666) internal successors, (461), 3 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:19:11,661 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:19:11,661 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 01:19:11,672 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2023-08-30 01:19:11,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:19:11,870 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-08-30 01:19:11,871 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:19:11,871 INFO L85 PathProgramCache]: Analyzing trace with hash 678212, now seen corresponding path program 1 times [2023-08-30 01:19:11,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:19:11,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1714754895] [2023-08-30 01:19:11,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 01:19:11,872 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:19:11,872 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:19:11,873 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 01:19:11,876 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-08-30 01:19:11,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 01:19:11,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 01:19:11,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:19:11,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 01:19:12,008 INFO L321 Elim1Store]: treesize reduction 24, result has 44.2 percent of original size [2023-08-30 01:19:12,009 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 26 [2023-08-30 01:19:12,019 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-08-30 01:19:12,109 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 01:19:12,109 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 01:19:12,109 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:19:12,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1714754895] [2023-08-30 01:19:12,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1714754895] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 01:19:12,110 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 01:19:12,110 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 01:19:12,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001647529] [2023-08-30 01:19:12,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 01:19:12,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 01:19:12,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:19:12,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 01:19:12,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 01:19:12,241 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 359 [2023-08-30 01:19:12,242 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 32 transitions, 87 flow. Second operand has 3 states, 3 states have (on average 154.0) internal successors, (462), 3 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:19:12,242 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:19:12,242 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 359 [2023-08-30 01:19:12,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:19:12,417 INFO L130 PetriNetUnfolder]: 304/445 cut-off events. [2023-08-30 01:19:12,417 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 01:19:12,418 INFO L83 FinitePrefix]: Finished finitePrefix Result has 905 conditions, 445 events. 304/445 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 1695 event pairs, 139 based on Foata normal form. 0/124 useless extension candidates. Maximal degree in co-relation 895. Up to 440 conditions per place. [2023-08-30 01:19:12,421 INFO L137 encePairwiseOnDemand]: 356/359 looper letters, 27 selfloop transitions, 1 changer transitions 0/30 dead transitions. [2023-08-30 01:19:12,421 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 30 transitions, 137 flow [2023-08-30 01:19:12,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 01:19:12,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 01:19:12,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 488 transitions. [2023-08-30 01:19:12,423 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4531104921077066 [2023-08-30 01:19:12,423 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 488 transitions. [2023-08-30 01:19:12,423 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 488 transitions. [2023-08-30 01:19:12,424 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:19:12,424 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 488 transitions. [2023-08-30 01:19:12,425 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 162.66666666666666) internal successors, (488), 3 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:19:12,427 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 359.0) internal successors, (1436), 4 states have internal predecessors, (1436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:19:12,428 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 359.0) internal successors, (1436), 4 states have internal predecessors, (1436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:19:12,428 INFO L175 Difference]: Start difference. First operand has 37 places, 32 transitions, 87 flow. Second operand 3 states and 488 transitions. [2023-08-30 01:19:12,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 30 transitions, 137 flow [2023-08-30 01:19:12,429 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 30 transitions, 133 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 01:19:12,430 INFO L231 Difference]: Finished difference. Result has 35 places, 30 transitions, 79 flow [2023-08-30 01:19:12,430 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=359, PETRI_DIFFERENCE_MINUEND_FLOW=77, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=79, PETRI_PLACES=35, PETRI_TRANSITIONS=30} [2023-08-30 01:19:12,432 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -3 predicate places. [2023-08-30 01:19:12,432 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 30 transitions, 79 flow [2023-08-30 01:19:12,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 154.0) internal successors, (462), 3 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:19:12,432 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:19:12,432 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 01:19:12,445 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2023-08-30 01:19:12,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:19:12,643 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-08-30 01:19:12,644 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:19:12,644 INFO L85 PathProgramCache]: Analyzing trace with hash 678210, now seen corresponding path program 1 times [2023-08-30 01:19:12,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:19:12,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1188116751] [2023-08-30 01:19:12,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 01:19:12,644 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:19:12,645 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:19:12,646 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 01:19:12,649 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2023-08-30 01:19:12,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 01:19:12,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 01:19:12,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:19:12,747 INFO L321 Elim1Store]: treesize reduction 50, result has 23.1 percent of original size [2023-08-30 01:19:12,748 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 29 [2023-08-30 01:19:12,786 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 01:19:12,786 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 01:19:12,786 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:19:12,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1188116751] [2023-08-30 01:19:12,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1188116751] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 01:19:12,787 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 01:19:12,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 01:19:12,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750433498] [2023-08-30 01:19:12,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 01:19:12,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 01:19:12,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:19:12,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 01:19:12,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 01:19:12,901 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 359 [2023-08-30 01:19:12,902 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 30 transitions, 79 flow. Second operand has 3 states, 3 states have (on average 154.0) internal successors, (462), 3 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:19:12,902 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:19:12,902 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 359 [2023-08-30 01:19:12,902 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:19:13,037 INFO L130 PetriNetUnfolder]: 210/320 cut-off events. [2023-08-30 01:19:13,037 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 01:19:13,037 INFO L83 FinitePrefix]: Finished finitePrefix Result has 653 conditions, 320 events. 210/320 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 1157 event pairs, 94 based on Foata normal form. 0/106 useless extension candidates. Maximal degree in co-relation 643. Up to 315 conditions per place. [2023-08-30 01:19:13,039 INFO L137 encePairwiseOnDemand]: 356/359 looper letters, 25 selfloop transitions, 1 changer transitions 0/28 dead transitions. [2023-08-30 01:19:13,039 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 28 transitions, 125 flow [2023-08-30 01:19:13,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 01:19:13,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 01:19:13,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 486 transitions. [2023-08-30 01:19:13,041 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45125348189415043 [2023-08-30 01:19:13,041 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 486 transitions. [2023-08-30 01:19:13,041 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 486 transitions. [2023-08-30 01:19:13,041 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:19:13,041 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 486 transitions. [2023-08-30 01:19:13,043 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 162.0) internal successors, (486), 3 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:19:13,044 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 359.0) internal successors, (1436), 4 states have internal predecessors, (1436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:19:13,045 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 359.0) internal successors, (1436), 4 states have internal predecessors, (1436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:19:13,045 INFO L175 Difference]: Start difference. First operand has 35 places, 30 transitions, 79 flow. Second operand 3 states and 486 transitions. [2023-08-30 01:19:13,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 28 transitions, 125 flow [2023-08-30 01:19:13,046 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 28 transitions, 124 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 01:19:13,047 INFO L231 Difference]: Finished difference. Result has 34 places, 28 transitions, 74 flow [2023-08-30 01:19:13,047 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=359, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=74, PETRI_PLACES=34, PETRI_TRANSITIONS=28} [2023-08-30 01:19:13,047 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -4 predicate places. [2023-08-30 01:19:13,048 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 28 transitions, 74 flow [2023-08-30 01:19:13,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 154.0) internal successors, (462), 3 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:19:13,048 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:19:13,048 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 01:19:13,061 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2023-08-30 01:19:13,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:19:13,261 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-08-30 01:19:13,261 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:19:13,262 INFO L85 PathProgramCache]: Analyzing trace with hash 678152, now seen corresponding path program 1 times [2023-08-30 01:19:13,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:19:13,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [986376593] [2023-08-30 01:19:13,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 01:19:13,262 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:19:13,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:19:13,263 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 01:19:13,265 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2023-08-30 01:19:13,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 01:19:13,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-30 01:19:13,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:19:13,370 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-30 01:19:13,370 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-30 01:19:13,425 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 01:19:13,425 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 01:19:13,608 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 01:19:13,608 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:19:13,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [986376593] [2023-08-30 01:19:13,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [986376593] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 01:19:13,609 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 01:19:13,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-08-30 01:19:13,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147851734] [2023-08-30 01:19:13,609 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 01:19:13,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 01:19:13,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:19:13,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 01:19:13,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-30 01:19:14,320 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 359 [2023-08-30 01:19:14,321 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 28 transitions, 74 flow. Second operand has 6 states, 6 states have (on average 149.0) internal successors, (894), 6 states have internal predecessors, (894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:19:14,321 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:19:14,321 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 359 [2023-08-30 01:19:14,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:19:14,781 INFO L130 PetriNetUnfolder]: 412/632 cut-off events. [2023-08-30 01:19:14,782 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 01:19:14,782 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1284 conditions, 632 events. 412/632 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 2826 event pairs, 187 based on Foata normal form. 3/219 useless extension candidates. Maximal degree in co-relation 1273. Up to 312 conditions per place. [2023-08-30 01:19:14,785 INFO L137 encePairwiseOnDemand]: 355/359 looper letters, 46 selfloop transitions, 7 changer transitions 0/55 dead transitions. [2023-08-30 01:19:14,785 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 55 transitions, 250 flow [2023-08-30 01:19:14,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 01:19:14,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 01:19:14,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 944 transitions. [2023-08-30 01:19:14,789 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4382544103992572 [2023-08-30 01:19:14,789 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 944 transitions. [2023-08-30 01:19:14,789 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 944 transitions. [2023-08-30 01:19:14,789 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:19:14,790 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 944 transitions. [2023-08-30 01:19:14,792 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 157.33333333333334) internal successors, (944), 6 states have internal predecessors, (944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:19:14,795 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 359.0) internal successors, (2513), 7 states have internal predecessors, (2513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:19:14,796 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 359.0) internal successors, (2513), 7 states have internal predecessors, (2513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:19:14,796 INFO L175 Difference]: Start difference. First operand has 34 places, 28 transitions, 74 flow. Second operand 6 states and 944 transitions. [2023-08-30 01:19:14,796 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 55 transitions, 250 flow [2023-08-30 01:19:14,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 55 transitions, 249 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 01:19:14,798 INFO L231 Difference]: Finished difference. Result has 42 places, 33 transitions, 131 flow [2023-08-30 01:19:14,798 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=359, PETRI_DIFFERENCE_MINUEND_FLOW=73, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=131, PETRI_PLACES=42, PETRI_TRANSITIONS=33} [2023-08-30 01:19:14,799 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 4 predicate places. [2023-08-30 01:19:14,799 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 33 transitions, 131 flow [2023-08-30 01:19:14,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 149.0) internal successors, (894), 6 states have internal predecessors, (894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:19:14,800 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:19:14,800 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 01:19:14,811 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2023-08-30 01:19:15,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:19:15,011 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-08-30 01:19:15,012 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:19:15,012 INFO L85 PathProgramCache]: Analyzing trace with hash 651775888, now seen corresponding path program 1 times [2023-08-30 01:19:15,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:19:15,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1385882313] [2023-08-30 01:19:15,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 01:19:15,012 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:19:15,012 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:19:15,014 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 01:19:15,017 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2023-08-30 01:19:15,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 01:19:15,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-30 01:19:15,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:19:15,152 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-30 01:19:15,153 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-30 01:19:15,319 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 01:19:15,319 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 01:19:15,492 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 01:19:15,492 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:19:15,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1385882313] [2023-08-30 01:19:15,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1385882313] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 01:19:15,493 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 01:19:15,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-08-30 01:19:15,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873313796] [2023-08-30 01:19:15,493 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 01:19:15,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 01:19:15,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:19:15,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 01:19:15,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-08-30 01:19:15,953 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 359 [2023-08-30 01:19:15,954 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 33 transitions, 131 flow. Second operand has 8 states, 8 states have (on average 145.25) internal successors, (1162), 8 states have internal predecessors, (1162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:19:15,954 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:19:15,954 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 359 [2023-08-30 01:19:15,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:19:16,290 INFO L130 PetriNetUnfolder]: 378/576 cut-off events. [2023-08-30 01:19:16,290 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2023-08-30 01:19:16,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1196 conditions, 576 events. 378/576 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 2512 event pairs, 171 based on Foata normal form. 0/213 useless extension candidates. Maximal degree in co-relation 1180. Up to 284 conditions per place. [2023-08-30 01:19:16,293 INFO L137 encePairwiseOnDemand]: 355/359 looper letters, 46 selfloop transitions, 3 changer transitions 0/51 dead transitions. [2023-08-30 01:19:16,293 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 51 transitions, 275 flow [2023-08-30 01:19:16,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 01:19:16,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 01:19:16,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 769 transitions. [2023-08-30 01:19:16,295 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4284122562674095 [2023-08-30 01:19:16,295 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 769 transitions. [2023-08-30 01:19:16,295 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 769 transitions. [2023-08-30 01:19:16,296 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:19:16,296 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 769 transitions. [2023-08-30 01:19:16,298 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 153.8) internal successors, (769), 5 states have internal predecessors, (769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:19:16,300 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 359.0) internal successors, (2154), 6 states have internal predecessors, (2154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:19:16,301 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 359.0) internal successors, (2154), 6 states have internal predecessors, (2154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:19:16,301 INFO L175 Difference]: Start difference. First operand has 42 places, 33 transitions, 131 flow. Second operand 5 states and 769 transitions. [2023-08-30 01:19:16,301 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 51 transitions, 275 flow [2023-08-30 01:19:16,302 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 51 transitions, 263 flow, removed 5 selfloop flow, removed 1 redundant places. [2023-08-30 01:19:16,303 INFO L231 Difference]: Finished difference. Result has 43 places, 31 transitions, 121 flow [2023-08-30 01:19:16,303 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=359, PETRI_DIFFERENCE_MINUEND_FLOW=115, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=121, PETRI_PLACES=43, PETRI_TRANSITIONS=31} [2023-08-30 01:19:16,304 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 5 predicate places. [2023-08-30 01:19:16,304 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 31 transitions, 121 flow [2023-08-30 01:19:16,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 145.25) internal successors, (1162), 8 states have internal predecessors, (1162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:19:16,305 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:19:16,305 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 01:19:16,314 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2023-08-30 01:19:16,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:19:16,513 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-08-30 01:19:16,513 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:19:16,513 INFO L85 PathProgramCache]: Analyzing trace with hash 651775886, now seen corresponding path program 1 times [2023-08-30 01:19:16,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:19:16,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [380244313] [2023-08-30 01:19:16,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 01:19:16,514 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:19:16,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:19:16,515 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 01:19:16,516 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2023-08-30 01:19:16,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 01:19:16,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 01:19:16,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:19:16,616 INFO L321 Elim1Store]: treesize reduction 43, result has 33.8 percent of original size [2023-08-30 01:19:16,617 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 29 [2023-08-30 01:19:16,633 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 01:19:16,634 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 01:19:16,634 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:19:16,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [380244313] [2023-08-30 01:19:16,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [380244313] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 01:19:16,634 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 01:19:16,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 01:19:16,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769514963] [2023-08-30 01:19:16,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 01:19:16,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 01:19:16,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:19:16,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 01:19:16,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 01:19:16,698 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 359 [2023-08-30 01:19:16,698 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 31 transitions, 121 flow. Second operand has 3 states, 3 states have (on average 151.66666666666666) internal successors, (455), 3 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:19:16,698 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:19:16,698 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 359 [2023-08-30 01:19:16,699 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:19:16,824 INFO L130 PetriNetUnfolder]: 353/529 cut-off events. [2023-08-30 01:19:16,824 INFO L131 PetriNetUnfolder]: For 14/14 co-relation queries the response was YES. [2023-08-30 01:19:16,825 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1101 conditions, 529 events. 353/529 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 2226 event pairs, 156 based on Foata normal form. 0/203 useless extension candidates. Maximal degree in co-relation 1084. Up to 519 conditions per place. [2023-08-30 01:19:16,827 INFO L137 encePairwiseOnDemand]: 356/359 looper letters, 26 selfloop transitions, 1 changer transitions 0/29 dead transitions. [2023-08-30 01:19:16,827 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 29 transitions, 171 flow [2023-08-30 01:19:16,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 01:19:16,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 01:19:16,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 473 transitions. [2023-08-30 01:19:16,829 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4391829155060353 [2023-08-30 01:19:16,829 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 473 transitions. [2023-08-30 01:19:16,829 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 473 transitions. [2023-08-30 01:19:16,829 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:19:16,829 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 473 transitions. [2023-08-30 01:19:16,830 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 157.66666666666666) internal successors, (473), 3 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:19:16,832 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 359.0) internal successors, (1436), 4 states have internal predecessors, (1436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:19:16,832 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 359.0) internal successors, (1436), 4 states have internal predecessors, (1436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:19:16,832 INFO L175 Difference]: Start difference. First operand has 43 places, 31 transitions, 121 flow. Second operand 3 states and 473 transitions. [2023-08-30 01:19:16,832 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 29 transitions, 171 flow [2023-08-30 01:19:16,833 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 29 transitions, 166 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 01:19:16,834 INFO L231 Difference]: Finished difference. Result has 40 places, 29 transitions, 114 flow [2023-08-30 01:19:16,834 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=359, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=114, PETRI_PLACES=40, PETRI_TRANSITIONS=29} [2023-08-30 01:19:16,834 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 2 predicate places. [2023-08-30 01:19:16,835 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 29 transitions, 114 flow [2023-08-30 01:19:16,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 151.66666666666666) internal successors, (455), 3 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:19:16,835 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:19:16,835 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-08-30 01:19:16,849 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 (9)] Ended with exit code 0 [2023-08-30 01:19:17,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:19:17,044 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-08-30 01:19:17,045 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:19:17,045 INFO L85 PathProgramCache]: Analyzing trace with hash -1270290372, now seen corresponding path program 2 times [2023-08-30 01:19:17,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:19:17,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2059686040] [2023-08-30 01:19:17,045 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 01:19:17,045 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:19:17,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:19:17,046 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 01:19:17,049 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2023-08-30 01:19:17,118 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 01:19:17,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 01:19:17,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 01:19:17,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:19:17,175 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-30 01:19:17,176 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-30 01:19:17,310 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 01:19:17,311 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 01:19:17,831 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 01:19:17,831 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:19:17,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2059686040] [2023-08-30 01:19:17,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2059686040] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 01:19:17,832 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 01:19:17,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-30 01:19:17,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122198863] [2023-08-30 01:19:17,832 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 01:19:17,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 01:19:17,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:19:17,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 01:19:17,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-08-30 01:19:20,291 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 359 [2023-08-30 01:19:20,293 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 29 transitions, 114 flow. Second operand has 12 states, 12 states have (on average 150.0) internal successors, (1800), 12 states have internal predecessors, (1800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:19:20,293 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:19:20,293 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 359 [2023-08-30 01:19:20,293 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:19:23,003 INFO L130 PetriNetUnfolder]: 1505/2282 cut-off events. [2023-08-30 01:19:23,003 INFO L131 PetriNetUnfolder]: For 57/57 co-relation queries the response was YES. [2023-08-30 01:19:23,006 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4623 conditions, 2282 events. 1505/2282 cut-off events. For 57/57 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 12074 event pairs, 694 based on Foata normal form. 6/917 useless extension candidates. Maximal degree in co-relation 4606. Up to 256 conditions per place. [2023-08-30 01:19:23,014 INFO L137 encePairwiseOnDemand]: 355/359 looper letters, 164 selfloop transitions, 12 changer transitions 0/178 dead transitions. [2023-08-30 01:19:23,014 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 178 transitions, 838 flow [2023-08-30 01:19:23,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 01:19:23,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 01:19:23,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1970 transitions. [2023-08-30 01:19:23,021 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.457288765088208 [2023-08-30 01:19:23,021 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1970 transitions. [2023-08-30 01:19:23,021 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1970 transitions. [2023-08-30 01:19:23,022 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:19:23,022 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1970 transitions. [2023-08-30 01:19:23,026 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 164.16666666666666) internal successors, (1970), 12 states have internal predecessors, (1970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:19:23,031 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 359.0) internal successors, (4667), 13 states have internal predecessors, (4667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:19:23,032 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 359.0) internal successors, (4667), 13 states have internal predecessors, (4667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:19:23,032 INFO L175 Difference]: Start difference. First operand has 40 places, 29 transitions, 114 flow. Second operand 12 states and 1970 transitions. [2023-08-30 01:19:23,032 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 178 transitions, 838 flow [2023-08-30 01:19:23,034 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 178 transitions, 837 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 01:19:23,036 INFO L231 Difference]: Finished difference. Result has 57 places, 36 transitions, 199 flow [2023-08-30 01:19:23,036 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=359, PETRI_DIFFERENCE_MINUEND_FLOW=113, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=199, PETRI_PLACES=57, PETRI_TRANSITIONS=36} [2023-08-30 01:19:23,045 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 19 predicate places. [2023-08-30 01:19:23,046 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 36 transitions, 199 flow [2023-08-30 01:19:23,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 150.0) internal successors, (1800), 12 states have internal predecessors, (1800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:19:23,047 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:19:23,047 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 01:19:23,057 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 (10)] Forceful destruction successful, exit code 0 [2023-08-30 01:19:23,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:19:23,257 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-08-30 01:19:23,257 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:19:23,257 INFO L85 PathProgramCache]: Analyzing trace with hash -1269789535, now seen corresponding path program 1 times [2023-08-30 01:19:23,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:19:23,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [850562898] [2023-08-30 01:19:23,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 01:19:23,258 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:19:23,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:19:23,259 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 01:19:23,262 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2023-08-30 01:19:23,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 01:19:23,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 01:19:23,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:19:23,380 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 01:19:23,380 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 01:19:23,518 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 31 [2023-08-30 01:19:23,581 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 01:19:23,581 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:19:23,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [850562898] [2023-08-30 01:19:23,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [850562898] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 01:19:23,582 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 01:19:23,582 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-08-30 01:19:23,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717555337] [2023-08-30 01:19:23,583 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 01:19:23,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 01:19:23,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:19:23,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 01:19:23,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-08-30 01:19:24,651 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 359 [2023-08-30 01:19:24,652 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 36 transitions, 199 flow. Second operand has 8 states, 8 states have (on average 146.25) internal successors, (1170), 8 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:19:24,652 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:19:24,652 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 359 [2023-08-30 01:19:24,652 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:19:25,424 INFO L130 PetriNetUnfolder]: 1973/3137 cut-off events. [2023-08-30 01:19:25,424 INFO L131 PetriNetUnfolder]: For 60/60 co-relation queries the response was YES. [2023-08-30 01:19:25,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6407 conditions, 3137 events. 1973/3137 cut-off events. For 60/60 co-relation queries the response was YES. Maximal size of possible extension queue 232. Compared 19303 event pairs, 441 based on Foata normal form. 0/1333 useless extension candidates. Maximal degree in co-relation 6382. Up to 1936 conditions per place. [2023-08-30 01:19:25,442 INFO L137 encePairwiseOnDemand]: 354/359 looper letters, 56 selfloop transitions, 10 changer transitions 0/68 dead transitions. [2023-08-30 01:19:25,442 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 68 transitions, 408 flow [2023-08-30 01:19:25,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 01:19:25,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 01:19:25,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1072 transitions. [2023-08-30 01:19:25,446 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4265817747711898 [2023-08-30 01:19:25,446 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1072 transitions. [2023-08-30 01:19:25,447 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1072 transitions. [2023-08-30 01:19:25,447 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:19:25,447 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1072 transitions. [2023-08-30 01:19:25,450 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 153.14285714285714) internal successors, (1072), 7 states have internal predecessors, (1072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:19:25,454 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 359.0) internal successors, (2872), 8 states have internal predecessors, (2872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:19:25,454 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 359.0) internal successors, (2872), 8 states have internal predecessors, (2872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:19:25,454 INFO L175 Difference]: Start difference. First operand has 57 places, 36 transitions, 199 flow. Second operand 7 states and 1072 transitions. [2023-08-30 01:19:25,455 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 68 transitions, 408 flow [2023-08-30 01:19:25,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 68 transitions, 395 flow, removed 1 selfloop flow, removed 4 redundant places. [2023-08-30 01:19:25,459 INFO L231 Difference]: Finished difference. Result has 61 places, 39 transitions, 231 flow [2023-08-30 01:19:25,459 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=359, PETRI_DIFFERENCE_MINUEND_FLOW=186, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=231, PETRI_PLACES=61, PETRI_TRANSITIONS=39} [2023-08-30 01:19:25,461 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 23 predicate places. [2023-08-30 01:19:25,461 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 39 transitions, 231 flow [2023-08-30 01:19:25,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 146.25) internal successors, (1170), 8 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:19:25,461 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:19:25,462 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 01:19:25,475 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2023-08-30 01:19:25,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:19:25,671 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-08-30 01:19:25,671 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:19:25,671 INFO L85 PathProgramCache]: Analyzing trace with hash -1269789536, now seen corresponding path program 1 times [2023-08-30 01:19:25,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:19:25,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1555182993] [2023-08-30 01:19:25,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 01:19:25,672 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:19:25,672 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:19:25,673 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 01:19:25,678 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2023-08-30 01:19:25,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 01:19:25,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-30 01:19:25,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:19:25,772 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-08-30 01:19:25,772 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 2 case distinctions, treesize of input 12 treesize of output 33 [2023-08-30 01:19:25,790 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 01:19:25,790 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 01:19:25,790 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:19:25,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1555182993] [2023-08-30 01:19:25,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1555182993] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 01:19:25,790 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 01:19:25,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 01:19:25,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679023491] [2023-08-30 01:19:25,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 01:19:25,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 01:19:25,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:19:25,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 01:19:25,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 01:19:25,918 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 359 [2023-08-30 01:19:25,918 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 39 transitions, 231 flow. Second operand has 4 states, 4 states have (on average 146.25) internal successors, (585), 4 states have internal predecessors, (585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:19:25,918 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:19:25,919 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 359 [2023-08-30 01:19:25,919 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:19:26,284 INFO L130 PetriNetUnfolder]: 1181/1967 cut-off events. [2023-08-30 01:19:26,285 INFO L131 PetriNetUnfolder]: For 569/569 co-relation queries the response was YES. [2023-08-30 01:19:26,288 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4547 conditions, 1967 events. 1181/1967 cut-off events. For 569/569 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 11534 event pairs, 657 based on Foata normal form. 0/1238 useless extension candidates. Maximal degree in co-relation 4519. Up to 1918 conditions per place. [2023-08-30 01:19:26,295 INFO L137 encePairwiseOnDemand]: 355/359 looper letters, 29 selfloop transitions, 6 changer transitions 0/37 dead transitions. [2023-08-30 01:19:26,295 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 37 transitions, 297 flow [2023-08-30 01:19:26,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 01:19:26,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 01:19:26,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 601 transitions. [2023-08-30 01:19:26,298 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41852367688022285 [2023-08-30 01:19:26,298 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 601 transitions. [2023-08-30 01:19:26,298 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 601 transitions. [2023-08-30 01:19:26,299 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:19:26,299 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 601 transitions. [2023-08-30 01:19:26,300 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 150.25) internal successors, (601), 4 states have internal predecessors, (601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:19:26,302 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 359.0) internal successors, (1795), 5 states have internal predecessors, (1795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:19:26,303 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 359.0) internal successors, (1795), 5 states have internal predecessors, (1795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:19:26,303 INFO L175 Difference]: Start difference. First operand has 61 places, 39 transitions, 231 flow. Second operand 4 states and 601 transitions. [2023-08-30 01:19:26,303 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 37 transitions, 297 flow [2023-08-30 01:19:26,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 37 transitions, 283 flow, removed 5 selfloop flow, removed 2 redundant places. [2023-08-30 01:19:26,306 INFO L231 Difference]: Finished difference. Result has 60 places, 37 transitions, 225 flow [2023-08-30 01:19:26,306 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=359, PETRI_DIFFERENCE_MINUEND_FLOW=213, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=225, PETRI_PLACES=60, PETRI_TRANSITIONS=37} [2023-08-30 01:19:26,307 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 22 predicate places. [2023-08-30 01:19:26,307 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 37 transitions, 225 flow [2023-08-30 01:19:26,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 146.25) internal successors, (585), 4 states have internal predecessors, (585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:19:26,307 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:19:26,307 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 01:19:26,319 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2023-08-30 01:19:26,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:19:26,517 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-08-30 01:19:26,517 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:19:26,517 INFO L85 PathProgramCache]: Analyzing trace with hash -708769242, now seen corresponding path program 1 times [2023-08-30 01:19:26,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:19:26,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [430576965] [2023-08-30 01:19:26,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 01:19:26,518 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:19:26,518 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:19:26,518 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 01:19:26,519 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2023-08-30 01:19:26,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 01:19:26,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-30 01:19:26,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:19:26,662 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-30 01:19:26,663 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-30 01:19:26,785 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 01:19:26,785 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 01:19:27,294 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 01:19:27,294 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:19:27,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [430576965] [2023-08-30 01:19:27,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [430576965] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 01:19:27,295 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 01:19:27,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-08-30 01:19:27,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098085587] [2023-08-30 01:19:27,295 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 01:19:27,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 01:19:27,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:19:27,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 01:19:27,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-08-30 01:19:31,498 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 359 [2023-08-30 01:19:31,499 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 37 transitions, 225 flow. Second operand has 8 states, 8 states have (on average 145.5) internal successors, (1164), 8 states have internal predecessors, (1164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:19:31,499 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:19:31,500 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 359 [2023-08-30 01:19:31,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:19:33,649 INFO L130 PetriNetUnfolder]: 937/1615 cut-off events. [2023-08-30 01:19:33,649 INFO L131 PetriNetUnfolder]: For 550/550 co-relation queries the response was YES. [2023-08-30 01:19:33,651 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3735 conditions, 1615 events. 937/1615 cut-off events. For 550/550 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 9337 event pairs, 523 based on Foata normal form. 21/1137 useless extension candidates. Maximal degree in co-relation 3706. Up to 1249 conditions per place. [2023-08-30 01:19:33,655 INFO L137 encePairwiseOnDemand]: 352/359 looper letters, 49 selfloop transitions, 11 changer transitions 0/62 dead transitions. [2023-08-30 01:19:33,655 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 62 transitions, 410 flow [2023-08-30 01:19:33,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 01:19:33,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 01:19:33,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1352 transitions. [2023-08-30 01:19:33,660 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.418446301454658 [2023-08-30 01:19:33,660 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1352 transitions. [2023-08-30 01:19:33,660 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1352 transitions. [2023-08-30 01:19:33,661 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:19:33,661 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1352 transitions. [2023-08-30 01:19:33,664 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 150.22222222222223) internal successors, (1352), 9 states have internal predecessors, (1352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:19:33,667 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 359.0) internal successors, (3590), 10 states have internal predecessors, (3590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:19:33,668 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 359.0) internal successors, (3590), 10 states have internal predecessors, (3590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:19:33,668 INFO L175 Difference]: Start difference. First operand has 60 places, 37 transitions, 225 flow. Second operand 9 states and 1352 transitions. [2023-08-30 01:19:33,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 62 transitions, 410 flow [2023-08-30 01:19:33,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 62 transitions, 403 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 01:19:33,671 INFO L231 Difference]: Finished difference. Result has 68 places, 37 transitions, 255 flow [2023-08-30 01:19:33,672 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=359, PETRI_DIFFERENCE_MINUEND_FLOW=218, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=255, PETRI_PLACES=68, PETRI_TRANSITIONS=37} [2023-08-30 01:19:33,672 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 30 predicate places. [2023-08-30 01:19:33,672 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 37 transitions, 255 flow [2023-08-30 01:19:33,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 145.5) internal successors, (1164), 8 states have internal predecessors, (1164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:19:33,673 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:19:33,673 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2023-08-30 01:19:33,686 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2023-08-30 01:19:33,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:19:33,882 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-08-30 01:19:33,882 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:19:33,883 INFO L85 PathProgramCache]: Analyzing trace with hash 486334298, now seen corresponding path program 2 times [2023-08-30 01:19:33,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:19:33,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1764910880] [2023-08-30 01:19:33,883 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 01:19:33,883 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:19:33,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:19:33,884 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 01:19:33,885 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2023-08-30 01:19:33,958 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 01:19:33,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 01:19:33,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-30 01:19:33,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:19:34,017 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-30 01:19:34,017 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-30 01:19:34,151 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-30 01:19:34,151 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 01:19:34,152 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:19:34,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1764910880] [2023-08-30 01:19:34,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1764910880] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 01:19:34,152 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 01:19:34,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 01:19:34,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048402319] [2023-08-30 01:19:34,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 01:19:34,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 01:19:34,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:19:34,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 01:19:34,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 01:19:34,391 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 359 [2023-08-30 01:19:34,391 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 37 transitions, 255 flow. Second operand has 4 states, 4 states have (on average 151.5) internal successors, (606), 4 states have internal predecessors, (606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:19:34,391 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:19:34,392 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 359 [2023-08-30 01:19:34,392 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:19:34,632 INFO L130 PetriNetUnfolder]: 533/995 cut-off events. [2023-08-30 01:19:34,632 INFO L131 PetriNetUnfolder]: For 968/968 co-relation queries the response was YES. [2023-08-30 01:19:34,634 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2310 conditions, 995 events. 533/995 cut-off events. For 968/968 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 5525 event pairs, 279 based on Foata normal form. 144/896 useless extension candidates. Maximal degree in co-relation 2279. Up to 946 conditions per place. [2023-08-30 01:19:34,638 INFO L137 encePairwiseOnDemand]: 354/359 looper letters, 26 selfloop transitions, 6 changer transitions 0/34 dead transitions. [2023-08-30 01:19:34,638 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 34 transitions, 297 flow [2023-08-30 01:19:34,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 01:19:34,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 01:19:34,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 619 transitions. [2023-08-30 01:19:34,640 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.431058495821727 [2023-08-30 01:19:34,640 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 619 transitions. [2023-08-30 01:19:34,640 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 619 transitions. [2023-08-30 01:19:34,641 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:19:34,641 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 619 transitions. [2023-08-30 01:19:34,642 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 154.75) internal successors, (619), 4 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:19:34,644 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 359.0) internal successors, (1795), 5 states have internal predecessors, (1795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:19:34,644 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 359.0) internal successors, (1795), 5 states have internal predecessors, (1795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:19:34,645 INFO L175 Difference]: Start difference. First operand has 68 places, 37 transitions, 255 flow. Second operand 4 states and 619 transitions. [2023-08-30 01:19:34,645 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 34 transitions, 297 flow [2023-08-30 01:19:34,646 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 34 transitions, 240 flow, removed 9 selfloop flow, removed 14 redundant places. [2023-08-30 01:19:34,647 INFO L231 Difference]: Finished difference. Result has 54 places, 34 transitions, 188 flow [2023-08-30 01:19:34,647 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=359, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=188, PETRI_PLACES=54, PETRI_TRANSITIONS=34} [2023-08-30 01:19:34,648 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 16 predicate places. [2023-08-30 01:19:34,648 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 34 transitions, 188 flow [2023-08-30 01:19:34,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 151.5) internal successors, (606), 4 states have internal predecessors, (606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:19:34,648 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:19:34,648 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1] [2023-08-30 01:19:34,663 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2023-08-30 01:19:34,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:19:34,857 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-08-30 01:19:34,858 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:19:34,858 INFO L85 PathProgramCache]: Analyzing trace with hash 1476326588, now seen corresponding path program 3 times [2023-08-30 01:19:34,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:19:34,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [464320199] [2023-08-30 01:19:34,858 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 01:19:34,858 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:19:34,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:19:34,859 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 01:19:34,861 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2023-08-30 01:19:35,037 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-08-30 01:19:35,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 01:19:35,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-30 01:19:35,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:19:35,103 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-30 01:19:35,104 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-30 01:19:35,411 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 01:19:35,411 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 01:19:37,245 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 01:19:37,245 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:19:37,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [464320199] [2023-08-30 01:19:37,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [464320199] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 01:19:37,246 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 01:19:37,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2023-08-30 01:19:37,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752821553] [2023-08-30 01:19:37,246 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 01:19:37,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-30 01:19:37,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:19:37,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-30 01:19:37,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2023-08-30 01:19:46,704 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 359 [2023-08-30 01:19:46,707 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 34 transitions, 188 flow. Second operand has 24 states, 24 states have (on average 150.0) internal successors, (3600), 24 states have internal predecessors, (3600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:19:46,707 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:19:46,707 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 359 [2023-08-30 01:19:46,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:19:58,936 INFO L130 PetriNetUnfolder]: 1201/2275 cut-off events. [2023-08-30 01:19:58,936 INFO L131 PetriNetUnfolder]: For 747/747 co-relation queries the response was YES. [2023-08-30 01:19:58,940 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5026 conditions, 2275 events. 1201/2275 cut-off events. For 747/747 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 13375 event pairs, 631 based on Foata normal form. 12/1860 useless extension candidates. Maximal degree in co-relation 5004. Up to 504 conditions per place. [2023-08-30 01:19:58,945 INFO L137 encePairwiseOnDemand]: 355/359 looper letters, 296 selfloop transitions, 24 changer transitions 0/322 dead transitions. [2023-08-30 01:19:58,946 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 322 transitions, 1780 flow [2023-08-30 01:19:58,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-30 01:19:58,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-30 01:19:58,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 3887 transitions. [2023-08-30 01:19:58,954 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45113741875580315 [2023-08-30 01:19:58,954 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 3887 transitions. [2023-08-30 01:19:58,955 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 3887 transitions. [2023-08-30 01:19:58,956 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:19:58,956 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 3887 transitions. [2023-08-30 01:19:58,963 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 161.95833333333334) internal successors, (3887), 24 states have internal predecessors, (3887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:19:58,971 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 359.0) internal successors, (8975), 25 states have internal predecessors, (8975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:19:58,972 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 359.0) internal successors, (8975), 25 states have internal predecessors, (8975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:19:58,972 INFO L175 Difference]: Start difference. First operand has 54 places, 34 transitions, 188 flow. Second operand 24 states and 3887 transitions. [2023-08-30 01:19:58,972 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 322 transitions, 1780 flow [2023-08-30 01:19:58,976 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 322 transitions, 1756 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 01:19:58,979 INFO L231 Difference]: Finished difference. Result has 88 places, 47 transitions, 346 flow [2023-08-30 01:19:58,979 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=359, PETRI_DIFFERENCE_MINUEND_FLOW=181, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=346, PETRI_PLACES=88, PETRI_TRANSITIONS=47} [2023-08-30 01:19:58,979 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 50 predicate places. [2023-08-30 01:19:58,979 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 47 transitions, 346 flow [2023-08-30 01:19:58,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 150.0) internal successors, (3600), 24 states have internal predecessors, (3600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:19:58,980 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:19:58,981 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 01:19:58,991 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2023-08-30 01:19:59,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:19:59,191 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-08-30 01:19:59,192 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:19:59,192 INFO L85 PathProgramCache]: Analyzing trace with hash 1572933441, now seen corresponding path program 1 times [2023-08-30 01:19:59,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:19:59,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1901533375] [2023-08-30 01:19:59,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 01:19:59,192 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:19:59,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:19:59,194 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 01:19:59,196 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2023-08-30 01:19:59,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 01:19:59,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-30 01:19:59,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:19:59,313 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 01:19:59,314 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 01:19:59,314 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:19:59,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1901533375] [2023-08-30 01:19:59,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1901533375] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 01:19:59,314 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 01:19:59,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 01:19:59,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508159271] [2023-08-30 01:19:59,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 01:19:59,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 01:19:59,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:19:59,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 01:19:59,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 01:19:59,355 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 359 [2023-08-30 01:19:59,355 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 47 transitions, 346 flow. Second operand has 3 states, 3 states have (on average 160.33333333333334) internal successors, (481), 3 states have internal predecessors, (481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:19:59,355 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:19:59,355 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 359 [2023-08-30 01:19:59,355 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:19:59,678 INFO L130 PetriNetUnfolder]: 1493/2756 cut-off events. [2023-08-30 01:19:59,678 INFO L131 PetriNetUnfolder]: For 608/608 co-relation queries the response was YES. [2023-08-30 01:19:59,683 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6187 conditions, 2756 events. 1493/2756 cut-off events. For 608/608 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 16734 event pairs, 273 based on Foata normal form. 21/2189 useless extension candidates. Maximal degree in co-relation 6152. Up to 2101 conditions per place. [2023-08-30 01:19:59,687 INFO L137 encePairwiseOnDemand]: 355/359 looper letters, 51 selfloop transitions, 4 changer transitions 1/58 dead transitions. [2023-08-30 01:19:59,687 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 58 transitions, 487 flow [2023-08-30 01:19:59,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 01:19:59,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 01:19:59,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 495 transitions. [2023-08-30 01:19:59,689 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4596100278551532 [2023-08-30 01:19:59,689 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 495 transitions. [2023-08-30 01:19:59,689 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 495 transitions. [2023-08-30 01:19:59,690 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:19:59,690 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 495 transitions. [2023-08-30 01:19:59,691 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 165.0) internal successors, (495), 3 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:19:59,692 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 359.0) internal successors, (1436), 4 states have internal predecessors, (1436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:19:59,692 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 359.0) internal successors, (1436), 4 states have internal predecessors, (1436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:19:59,692 INFO L175 Difference]: Start difference. First operand has 88 places, 47 transitions, 346 flow. Second operand 3 states and 495 transitions. [2023-08-30 01:19:59,693 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 58 transitions, 487 flow [2023-08-30 01:19:59,696 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 58 transitions, 463 flow, removed 1 selfloop flow, removed 10 redundant places. [2023-08-30 01:19:59,698 INFO L231 Difference]: Finished difference. Result has 81 places, 50 transitions, 352 flow [2023-08-30 01:19:59,698 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=359, PETRI_DIFFERENCE_MINUEND_FLOW=322, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=352, PETRI_PLACES=81, PETRI_TRANSITIONS=50} [2023-08-30 01:19:59,698 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 43 predicate places. [2023-08-30 01:19:59,699 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 50 transitions, 352 flow [2023-08-30 01:19:59,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 160.33333333333334) internal successors, (481), 3 states have internal predecessors, (481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:19:59,699 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:19:59,699 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 01:19:59,711 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2023-08-30 01:19:59,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:19:59,909 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-08-30 01:19:59,909 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:19:59,909 INFO L85 PathProgramCache]: Analyzing trace with hash -7085512, now seen corresponding path program 1 times [2023-08-30 01:19:59,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:19:59,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [448633345] [2023-08-30 01:19:59,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 01:19:59,910 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:19:59,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:19:59,910 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 01:19:59,911 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2023-08-30 01:20:00,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 01:20:00,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 01:20:00,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:20:00,029 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 01:20:00,029 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 01:20:00,029 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:20:00,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [448633345] [2023-08-30 01:20:00,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [448633345] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 01:20:00,030 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 01:20:00,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 01:20:00,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921238971] [2023-08-30 01:20:00,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 01:20:00,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 01:20:00,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:20:00,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 01:20:00,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 01:20:00,061 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 359 [2023-08-30 01:20:00,062 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 50 transitions, 352 flow. Second operand has 4 states, 4 states have (on average 155.75) internal successors, (623), 4 states have internal predecessors, (623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:20:00,062 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:20:00,062 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 359 [2023-08-30 01:20:00,062 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:20:00,419 INFO L130 PetriNetUnfolder]: 1463/2827 cut-off events. [2023-08-30 01:20:00,419 INFO L131 PetriNetUnfolder]: For 1073/1073 co-relation queries the response was YES. [2023-08-30 01:20:00,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7128 conditions, 2827 events. 1463/2827 cut-off events. For 1073/1073 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 17894 event pairs, 420 based on Foata normal form. 160/2907 useless extension candidates. Maximal degree in co-relation 7091. Up to 1608 conditions per place. [2023-08-30 01:20:00,429 INFO L137 encePairwiseOnDemand]: 355/359 looper letters, 56 selfloop transitions, 6 changer transitions 2/65 dead transitions. [2023-08-30 01:20:00,429 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 65 transitions, 521 flow [2023-08-30 01:20:00,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 01:20:00,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 01:20:00,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 641 transitions. [2023-08-30 01:20:00,431 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44637883008356544 [2023-08-30 01:20:00,431 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 641 transitions. [2023-08-30 01:20:00,431 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 641 transitions. [2023-08-30 01:20:00,431 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:20:00,431 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 641 transitions. [2023-08-30 01:20:00,432 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 160.25) internal successors, (641), 4 states have internal predecessors, (641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:20:00,433 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 359.0) internal successors, (1795), 5 states have internal predecessors, (1795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:20:00,433 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 359.0) internal successors, (1795), 5 states have internal predecessors, (1795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:20:00,434 INFO L175 Difference]: Start difference. First operand has 81 places, 50 transitions, 352 flow. Second operand 4 states and 641 transitions. [2023-08-30 01:20:00,434 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 65 transitions, 521 flow [2023-08-30 01:20:00,437 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 65 transitions, 516 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 01:20:00,438 INFO L231 Difference]: Finished difference. Result has 85 places, 51 transitions, 375 flow [2023-08-30 01:20:00,439 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=359, PETRI_DIFFERENCE_MINUEND_FLOW=348, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=375, PETRI_PLACES=85, PETRI_TRANSITIONS=51} [2023-08-30 01:20:00,439 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 47 predicate places. [2023-08-30 01:20:00,439 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 51 transitions, 375 flow [2023-08-30 01:20:00,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 155.75) internal successors, (623), 4 states have internal predecessors, (623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:20:00,440 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:20:00,440 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 01:20:00,449 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2023-08-30 01:20:00,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:20:00,645 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-08-30 01:20:00,645 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:20:00,645 INFO L85 PathProgramCache]: Analyzing trace with hash 807173980, now seen corresponding path program 2 times [2023-08-30 01:20:00,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:20:00,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1430796107] [2023-08-30 01:20:00,645 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 01:20:00,646 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:20:00,646 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:20:00,646 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 01:20:00,647 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2023-08-30 01:20:00,726 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 01:20:00,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 01:20:00,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 01:20:00,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:20:00,775 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 01:20:00,776 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 01:20:00,805 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 01:20:00,806 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:20:00,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1430796107] [2023-08-30 01:20:00,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1430796107] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-30 01:20:00,806 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 01:20:00,806 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2023-08-30 01:20:00,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345439324] [2023-08-30 01:20:00,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 01:20:00,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 01:20:00,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:20:00,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 01:20:00,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-08-30 01:20:00,826 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 359 [2023-08-30 01:20:00,826 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 51 transitions, 375 flow. Second operand has 4 states, 4 states have (on average 155.75) internal successors, (623), 4 states have internal predecessors, (623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:20:00,826 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:20:00,826 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 359 [2023-08-30 01:20:00,826 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:20:01,284 INFO L130 PetriNetUnfolder]: 1663/3127 cut-off events. [2023-08-30 01:20:01,284 INFO L131 PetriNetUnfolder]: For 3078/3102 co-relation queries the response was YES. [2023-08-30 01:20:01,293 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9530 conditions, 3127 events. 1663/3127 cut-off events. For 3078/3102 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 18854 event pairs, 460 based on Foata normal form. 82/3109 useless extension candidates. Maximal degree in co-relation 9491. Up to 2080 conditions per place. [2023-08-30 01:20:01,301 INFO L137 encePairwiseOnDemand]: 355/359 looper letters, 54 selfloop transitions, 6 changer transitions 4/65 dead transitions. [2023-08-30 01:20:01,301 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 65 transitions, 559 flow [2023-08-30 01:20:01,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 01:20:01,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 01:20:01,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 641 transitions. [2023-08-30 01:20:01,304 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44637883008356544 [2023-08-30 01:20:01,304 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 641 transitions. [2023-08-30 01:20:01,305 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 641 transitions. [2023-08-30 01:20:01,305 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:20:01,305 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 641 transitions. [2023-08-30 01:20:01,307 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 160.25) internal successors, (641), 4 states have internal predecessors, (641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:20:01,309 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 359.0) internal successors, (1795), 5 states have internal predecessors, (1795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:20:01,309 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 359.0) internal successors, (1795), 5 states have internal predecessors, (1795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:20:01,309 INFO L175 Difference]: Start difference. First operand has 85 places, 51 transitions, 375 flow. Second operand 4 states and 641 transitions. [2023-08-30 01:20:01,309 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 65 transitions, 559 flow [2023-08-30 01:20:01,316 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 65 transitions, 539 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-30 01:20:01,317 INFO L231 Difference]: Finished difference. Result has 89 places, 54 transitions, 407 flow [2023-08-30 01:20:01,317 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=359, PETRI_DIFFERENCE_MINUEND_FLOW=362, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=407, PETRI_PLACES=89, PETRI_TRANSITIONS=54} [2023-08-30 01:20:01,318 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 51 predicate places. [2023-08-30 01:20:01,318 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 54 transitions, 407 flow [2023-08-30 01:20:01,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 155.75) internal successors, (623), 4 states have internal predecessors, (623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:20:01,318 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:20:01,318 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 01:20:01,330 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2023-08-30 01:20:01,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:20:01,528 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-08-30 01:20:01,529 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:20:01,529 INFO L85 PathProgramCache]: Analyzing trace with hash 1719858430, now seen corresponding path program 1 times [2023-08-30 01:20:01,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:20:01,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [479012169] [2023-08-30 01:20:01,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 01:20:01,529 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:20:01,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:20:01,530 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 01:20:01,531 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2023-08-30 01:20:01,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 01:20:01,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 01:20:01,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:20:01,623 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 01:20:01,623 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 01:20:01,623 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:20:01,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [479012169] [2023-08-30 01:20:01,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [479012169] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 01:20:01,623 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 01:20:01,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 01:20:01,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114574511] [2023-08-30 01:20:01,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 01:20:01,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 01:20:01,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:20:01,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 01:20:01,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 01:20:01,648 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 359 [2023-08-30 01:20:01,649 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 54 transitions, 407 flow. Second operand has 4 states, 4 states have (on average 154.75) internal successors, (619), 4 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:20:01,649 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:20:01,649 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 359 [2023-08-30 01:20:01,649 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:20:02,121 INFO L130 PetriNetUnfolder]: 1703/3387 cut-off events. [2023-08-30 01:20:02,121 INFO L131 PetriNetUnfolder]: For 5079/5319 co-relation queries the response was YES. [2023-08-30 01:20:02,129 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10232 conditions, 3387 events. 1703/3387 cut-off events. For 5079/5319 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 21989 event pairs, 620 based on Foata normal form. 200/3467 useless extension candidates. Maximal degree in co-relation 10191. Up to 2228 conditions per place. [2023-08-30 01:20:02,135 INFO L137 encePairwiseOnDemand]: 355/359 looper letters, 63 selfloop transitions, 4 changer transitions 2/71 dead transitions. [2023-08-30 01:20:02,135 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 71 transitions, 620 flow [2023-08-30 01:20:02,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 01:20:02,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 01:20:02,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 635 transitions. [2023-08-30 01:20:02,138 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44220055710306405 [2023-08-30 01:20:02,138 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 635 transitions. [2023-08-30 01:20:02,138 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 635 transitions. [2023-08-30 01:20:02,138 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:20:02,138 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 635 transitions. [2023-08-30 01:20:02,139 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 158.75) internal successors, (635), 4 states have internal predecessors, (635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:20:02,141 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 359.0) internal successors, (1795), 5 states have internal predecessors, (1795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:20:02,141 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 359.0) internal successors, (1795), 5 states have internal predecessors, (1795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:20:02,141 INFO L175 Difference]: Start difference. First operand has 89 places, 54 transitions, 407 flow. Second operand 4 states and 635 transitions. [2023-08-30 01:20:02,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 71 transitions, 620 flow [2023-08-30 01:20:02,156 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 71 transitions, 615 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 01:20:02,157 INFO L231 Difference]: Finished difference. Result has 93 places, 56 transitions, 435 flow [2023-08-30 01:20:02,158 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=359, PETRI_DIFFERENCE_MINUEND_FLOW=404, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=435, PETRI_PLACES=93, PETRI_TRANSITIONS=56} [2023-08-30 01:20:02,158 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 55 predicate places. [2023-08-30 01:20:02,158 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 56 transitions, 435 flow [2023-08-30 01:20:02,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 154.75) internal successors, (619), 4 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:20:02,158 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:20:02,159 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 01:20:02,171 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2023-08-30 01:20:02,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:20:02,371 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-08-30 01:20:02,371 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:20:02,371 INFO L85 PathProgramCache]: Analyzing trace with hash -1254785704, now seen corresponding path program 2 times [2023-08-30 01:20:02,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:20:02,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1006299116] [2023-08-30 01:20:02,372 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 01:20:02,372 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:20:02,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:20:02,373 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 01:20:02,400 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2023-08-30 01:20:02,468 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 01:20:02,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 01:20:02,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 01:20:02,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:20:02,495 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 01:20:02,495 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 01:20:02,544 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 01:20:02,545 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:20:02,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1006299116] [2023-08-30 01:20:02,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1006299116] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 01:20:02,545 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 01:20:02,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2023-08-30 01:20:02,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691514990] [2023-08-30 01:20:02,546 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 01:20:02,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 01:20:02,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:20:02,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 01:20:02,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-08-30 01:20:02,616 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 359 [2023-08-30 01:20:02,617 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 56 transitions, 435 flow. Second operand has 6 states, 6 states have (on average 155.5) internal successors, (933), 6 states have internal predecessors, (933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:20:02,617 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:20:02,617 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 359 [2023-08-30 01:20:02,617 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:20:03,581 INFO L130 PetriNetUnfolder]: 2783/5327 cut-off events. [2023-08-30 01:20:03,582 INFO L131 PetriNetUnfolder]: For 10653/11413 co-relation queries the response was YES. [2023-08-30 01:20:03,595 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19454 conditions, 5327 events. 2783/5327 cut-off events. For 10653/11413 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 37001 event pairs, 540 based on Foata normal form. 1200/6527 useless extension candidates. Maximal degree in co-relation 19411. Up to 1841 conditions per place. [2023-08-30 01:20:03,607 INFO L137 encePairwiseOnDemand]: 355/359 looper letters, 77 selfloop transitions, 15 changer transitions 7/100 dead transitions. [2023-08-30 01:20:03,607 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 100 transitions, 847 flow [2023-08-30 01:20:03,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 01:20:03,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 01:20:03,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1121 transitions. [2023-08-30 01:20:03,610 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4460803820135296 [2023-08-30 01:20:03,610 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1121 transitions. [2023-08-30 01:20:03,610 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1121 transitions. [2023-08-30 01:20:03,610 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:20:03,611 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1121 transitions. [2023-08-30 01:20:03,612 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 160.14285714285714) internal successors, (1121), 7 states have internal predecessors, (1121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:20:03,614 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 359.0) internal successors, (2872), 8 states have internal predecessors, (2872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:20:03,614 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 359.0) internal successors, (2872), 8 states have internal predecessors, (2872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:20:03,615 INFO L175 Difference]: Start difference. First operand has 93 places, 56 transitions, 435 flow. Second operand 7 states and 1121 transitions. [2023-08-30 01:20:03,615 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 100 transitions, 847 flow [2023-08-30 01:20:03,658 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 100 transitions, 808 flow, removed 16 selfloop flow, removed 1 redundant places. [2023-08-30 01:20:03,659 INFO L231 Difference]: Finished difference. Result has 101 places, 62 transitions, 527 flow [2023-08-30 01:20:03,659 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=359, PETRI_DIFFERENCE_MINUEND_FLOW=424, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=527, PETRI_PLACES=101, PETRI_TRANSITIONS=62} [2023-08-30 01:20:03,660 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 63 predicate places. [2023-08-30 01:20:03,660 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 62 transitions, 527 flow [2023-08-30 01:20:03,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 155.5) internal successors, (933), 6 states have internal predecessors, (933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:20:03,660 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:20:03,660 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 01:20:03,679 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2023-08-30 01:20:03,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:20:03,871 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-08-30 01:20:03,872 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:20:03,872 INFO L85 PathProgramCache]: Analyzing trace with hash -671136611, now seen corresponding path program 3 times [2023-08-30 01:20:03,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:20:03,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1259834210] [2023-08-30 01:20:03,872 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 01:20:03,872 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:20:03,873 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:20:03,873 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 01:20:03,876 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2023-08-30 01:20:03,964 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 01:20:03,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 01:20:03,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-30 01:20:03,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:20:04,025 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 01:20:04,025 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 01:20:04,055 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 01:20:04,055 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:20:04,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1259834210] [2023-08-30 01:20:04,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1259834210] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-30 01:20:04,056 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 01:20:04,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2023-08-30 01:20:04,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660541048] [2023-08-30 01:20:04,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 01:20:04,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 01:20:04,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:20:04,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 01:20:04,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-08-30 01:20:04,086 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 359 [2023-08-30 01:20:04,086 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 62 transitions, 527 flow. Second operand has 4 states, 4 states have (on average 155.0) internal successors, (620), 4 states have internal predecessors, (620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:20:04,086 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:20:04,087 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 359 [2023-08-30 01:20:04,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:20:04,948 INFO L130 PetriNetUnfolder]: 3363/6187 cut-off events. [2023-08-30 01:20:04,948 INFO L131 PetriNetUnfolder]: For 14737/15137 co-relation queries the response was YES. [2023-08-30 01:20:04,966 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23977 conditions, 6187 events. 3363/6187 cut-off events. For 14737/15137 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 39209 event pairs, 760 based on Foata normal form. 440/6567 useless extension candidates. Maximal degree in co-relation 23931. Up to 5120 conditions per place. [2023-08-30 01:20:04,982 INFO L137 encePairwiseOnDemand]: 355/359 looper letters, 67 selfloop transitions, 6 changer transitions 1/76 dead transitions. [2023-08-30 01:20:04,982 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 76 transitions, 746 flow [2023-08-30 01:20:04,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 01:20:04,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 01:20:04,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 635 transitions. [2023-08-30 01:20:04,985 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44220055710306405 [2023-08-30 01:20:04,985 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 635 transitions. [2023-08-30 01:20:04,985 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 635 transitions. [2023-08-30 01:20:04,985 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:20:04,985 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 635 transitions. [2023-08-30 01:20:04,986 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 158.75) internal successors, (635), 4 states have internal predecessors, (635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:20:04,988 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 359.0) internal successors, (1795), 5 states have internal predecessors, (1795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:20:04,988 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 359.0) internal successors, (1795), 5 states have internal predecessors, (1795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:20:04,988 INFO L175 Difference]: Start difference. First operand has 101 places, 62 transitions, 527 flow. Second operand 4 states and 635 transitions. [2023-08-30 01:20:04,988 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 76 transitions, 746 flow [2023-08-30 01:20:05,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 76 transitions, 710 flow, removed 13 selfloop flow, removed 2 redundant places. [2023-08-30 01:20:05,014 INFO L231 Difference]: Finished difference. Result has 103 places, 64 transitions, 535 flow [2023-08-30 01:20:05,015 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=359, PETRI_DIFFERENCE_MINUEND_FLOW=501, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=535, PETRI_PLACES=103, PETRI_TRANSITIONS=64} [2023-08-30 01:20:05,015 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 65 predicate places. [2023-08-30 01:20:05,015 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 64 transitions, 535 flow [2023-08-30 01:20:05,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 155.0) internal successors, (620), 4 states have internal predecessors, (620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:20:05,016 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:20:05,016 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 01:20:05,026 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2023-08-30 01:20:05,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:20:05,226 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-08-30 01:20:05,226 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:20:05,226 INFO L85 PathProgramCache]: Analyzing trace with hash 322299853, now seen corresponding path program 4 times [2023-08-30 01:20:05,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:20:05,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1927531344] [2023-08-30 01:20:05,227 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 01:20:05,227 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:20:05,227 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:20:05,228 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 01:20:05,229 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2023-08-30 01:20:05,311 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 01:20:05,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 01:20:05,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-30 01:20:05,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:20:05,389 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 01:20:05,389 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 01:20:05,546 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 01:20:05,546 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:20:05,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1927531344] [2023-08-30 01:20:05,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1927531344] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 01:20:05,546 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 01:20:05,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2023-08-30 01:20:05,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312245692] [2023-08-30 01:20:05,547 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 01:20:05,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-30 01:20:05,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:20:05,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-30 01:20:05,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-08-30 01:20:05,706 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 359 [2023-08-30 01:20:05,707 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 64 transitions, 535 flow. Second operand has 11 states, 11 states have (on average 150.36363636363637) internal successors, (1654), 11 states have internal predecessors, (1654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:20:05,707 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:20:05,707 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 359 [2023-08-30 01:20:05,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:20:08,250 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 [1] [2023-08-30 01:20:10,366 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 01:20:12,373 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 01:20:14,074 INFO L130 PetriNetUnfolder]: 6023/10827 cut-off events. [2023-08-30 01:20:14,074 INFO L131 PetriNetUnfolder]: For 29071/29071 co-relation queries the response was YES. [2023-08-30 01:20:14,106 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42799 conditions, 10827 events. 6023/10827 cut-off events. For 29071/29071 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 74097 event pairs, 1540 based on Foata normal form. 400/11227 useless extension candidates. Maximal degree in co-relation 42751. Up to 6028 conditions per place. [2023-08-30 01:20:14,135 INFO L137 encePairwiseOnDemand]: 352/359 looper letters, 83 selfloop transitions, 55 changer transitions 4/142 dead transitions. [2023-08-30 01:20:14,135 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 142 transitions, 1255 flow [2023-08-30 01:20:14,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-30 01:20:14,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-30 01:20:14,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2007 transitions. [2023-08-30 01:20:14,141 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43004071137775873 [2023-08-30 01:20:14,141 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2007 transitions. [2023-08-30 01:20:14,141 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2007 transitions. [2023-08-30 01:20:14,141 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:20:14,142 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2007 transitions. [2023-08-30 01:20:14,146 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 154.3846153846154) internal successors, (2007), 13 states have internal predecessors, (2007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:20:14,151 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 359.0) internal successors, (5026), 14 states have internal predecessors, (5026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:20:14,152 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 359.0) internal successors, (5026), 14 states have internal predecessors, (5026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:20:14,152 INFO L175 Difference]: Start difference. First operand has 103 places, 64 transitions, 535 flow. Second operand 13 states and 2007 transitions. [2023-08-30 01:20:14,152 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 142 transitions, 1255 flow [2023-08-30 01:20:14,217 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 142 transitions, 1236 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-30 01:20:14,220 INFO L231 Difference]: Finished difference. Result has 120 places, 109 transitions, 1042 flow [2023-08-30 01:20:14,220 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=359, PETRI_DIFFERENCE_MINUEND_FLOW=529, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1042, PETRI_PLACES=120, PETRI_TRANSITIONS=109} [2023-08-30 01:20:14,220 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 82 predicate places. [2023-08-30 01:20:14,220 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 109 transitions, 1042 flow [2023-08-30 01:20:14,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 150.36363636363637) internal successors, (1654), 11 states have internal predecessors, (1654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:20:14,221 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:20:14,221 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 01:20:14,235 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 01:20:14,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:20:14,432 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-08-30 01:20:14,432 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:20:14,432 INFO L85 PathProgramCache]: Analyzing trace with hash -996186711, now seen corresponding path program 5 times [2023-08-30 01:20:14,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:20:14,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1496113256] [2023-08-30 01:20:14,432 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 01:20:14,433 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:20:14,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:20:14,434 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 01:20:14,436 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2023-08-30 01:20:14,536 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 01:20:14,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 01:20:14,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-30 01:20:14,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:20:14,848 INFO L321 Elim1Store]: treesize reduction 164, result has 7.3 percent of original size [2023-08-30 01:20:14,848 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 12 new quantified variables, introduced 28 case distinctions, treesize of input 178 treesize of output 90 [2023-08-30 01:20:14,915 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 01:20:14,915 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 01:20:15,306 INFO L321 Elim1Store]: treesize reduction 201, result has 20.6 percent of original size [2023-08-30 01:20:15,307 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 12 new quantified variables, introduced 28 case distinctions, treesize of input 299 treesize of output 140 [2023-08-30 01:20:16,335 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 01:20:16,335 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:20:16,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1496113256] [2023-08-30 01:20:16,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1496113256] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 01:20:16,335 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 01:20:16,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-30 01:20:16,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31087063] [2023-08-30 01:20:16,336 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 01:20:16,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 01:20:16,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:20:16,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 01:20:16,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-08-30 01:20:17,460 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 359 [2023-08-30 01:20:17,461 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 109 transitions, 1042 flow. Second operand has 12 states, 12 states have (on average 142.5) internal successors, (1710), 12 states have internal predecessors, (1710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:20:17,461 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:20:17,461 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 359 [2023-08-30 01:20:17,461 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:20:20,048 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 01:20:22,050 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 01:20:24,057 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 01:20:26,066 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 01:20:28,142 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 01:20:30,146 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 01:20:32,152 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 01:20:34,159 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 01:20:36,224 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-30 01:20:38,225 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-30 01:20:40,228 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-30 01:20:42,244 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-30 01:20:44,246 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-30 01:20:46,247 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-30 01:20:47,847 INFO L130 PetriNetUnfolder]: 5781/10463 cut-off events. [2023-08-30 01:20:47,847 INFO L131 PetriNetUnfolder]: For 48840/49849 co-relation queries the response was YES. [2023-08-30 01:20:47,882 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51713 conditions, 10463 events. 5781/10463 cut-off events. For 48840/49849 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 72821 event pairs, 786 based on Foata normal form. 896/11251 useless extension candidates. Maximal degree in co-relation 51659. Up to 9070 conditions per place. [2023-08-30 01:20:47,916 INFO L137 encePairwiseOnDemand]: 351/359 looper letters, 116 selfloop transitions, 27 changer transitions 113/263 dead transitions. [2023-08-30 01:20:47,917 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 263 transitions, 2775 flow [2023-08-30 01:20:47,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-30 01:20:47,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-30 01:20:47,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2046 transitions. [2023-08-30 01:20:47,919 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40708316752885 [2023-08-30 01:20:47,919 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2046 transitions. [2023-08-30 01:20:47,919 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2046 transitions. [2023-08-30 01:20:47,920 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:20:47,920 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2046 transitions. [2023-08-30 01:20:47,922 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 146.14285714285714) internal successors, (2046), 14 states have internal predecessors, (2046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:20:47,927 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 359.0) internal successors, (5385), 15 states have internal predecessors, (5385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:20:47,927 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 359.0) internal successors, (5385), 15 states have internal predecessors, (5385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:20:47,927 INFO L175 Difference]: Start difference. First operand has 120 places, 109 transitions, 1042 flow. Second operand 14 states and 2046 transitions. [2023-08-30 01:20:47,927 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 263 transitions, 2775 flow [2023-08-30 01:20:48,093 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 263 transitions, 2456 flow, removed 133 selfloop flow, removed 4 redundant places. [2023-08-30 01:20:48,096 INFO L231 Difference]: Finished difference. Result has 136 places, 121 transitions, 1113 flow [2023-08-30 01:20:48,096 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=359, PETRI_DIFFERENCE_MINUEND_FLOW=892, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1113, PETRI_PLACES=136, PETRI_TRANSITIONS=121} [2023-08-30 01:20:48,096 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 98 predicate places. [2023-08-30 01:20:48,096 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 121 transitions, 1113 flow [2023-08-30 01:20:48,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 142.5) internal successors, (1710), 12 states have internal predecessors, (1710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:20:48,097 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:20:48,097 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 01:20:48,105 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2023-08-30 01:20:48,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:20:48,298 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-08-30 01:20:48,299 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:20:48,299 INFO L85 PathProgramCache]: Analyzing trace with hash 1938222630, now seen corresponding path program 1 times [2023-08-30 01:20:48,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:20:48,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1445082112] [2023-08-30 01:20:48,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 01:20:48,299 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:20:48,299 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:20:48,300 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 01:20:48,301 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2023-08-30 01:20:48,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 01:20:48,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 26 conjunts are in the unsatisfiable core [2023-08-30 01:20:48,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:20:48,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 01:20:48,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 01:20:48,692 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 01:20:48,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 01:20:48,695 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 01:20:48,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 01:20:48,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 01:20:48,699 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 01:20:48,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 01:20:48,702 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 01:20:48,804 INFO L321 Elim1Store]: treesize reduction 348, result has 6.7 percent of original size [2023-08-30 01:20:48,805 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 6 disjoint index pairs (out of 66 index pairs), introduced 16 new quantified variables, introduced 66 case distinctions, treesize of input 217 treesize of output 111 [2023-08-30 01:20:48,849 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 01:20:48,850 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 01:20:50,071 INFO L321 Elim1Store]: treesize reduction 566, result has 15.9 percent of original size [2023-08-30 01:20:50,072 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 16 new quantified variables, introduced 66 case distinctions, treesize of input 340 treesize of output 201 [2023-08-30 01:22:17,466 WARN L222 SmtUtils]: Spent 1.00m on a formula simplification. DAG size of input: 1496 DAG size of output: 36 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 01:22:18,298 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 01:22:18,299 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:22:18,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1445082112] [2023-08-30 01:22:18,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1445082112] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 01:22:18,299 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 01:22:18,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-30 01:22:18,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652629817] [2023-08-30 01:22:18,299 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 01:22:18,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 01:22:18,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:22:18,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 01:22:18,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=96, Unknown=3, NotChecked=0, Total=132 [2023-08-30 01:22:26,733 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 359 [2023-08-30 01:22:26,734 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 121 transitions, 1113 flow. Second operand has 12 states, 12 states have (on average 117.66666666666667) internal successors, (1412), 12 states have internal predecessors, (1412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:22:26,734 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:22:26,734 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 359 [2023-08-30 01:22:26,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:22:32,119 INFO L130 PetriNetUnfolder]: 5407/9817 cut-off events. [2023-08-30 01:22:32,120 INFO L131 PetriNetUnfolder]: For 44977/45987 co-relation queries the response was YES. [2023-08-30 01:22:32,277 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47985 conditions, 9817 events. 5407/9817 cut-off events. For 44977/45987 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 68281 event pairs, 742 based on Foata normal form. 759/10437 useless extension candidates. Maximal degree in co-relation 47924. Up to 8950 conditions per place. [2023-08-30 01:22:32,301 INFO L137 encePairwiseOnDemand]: 351/359 looper letters, 103 selfloop transitions, 13 changer transitions 46/169 dead transitions. [2023-08-30 01:22:32,301 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 169 transitions, 1785 flow [2023-08-30 01:22:32,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-30 01:22:32,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-30 01:22:32,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1207 transitions. [2023-08-30 01:22:32,302 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3362116991643454 [2023-08-30 01:22:32,302 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1207 transitions. [2023-08-30 01:22:32,302 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1207 transitions. [2023-08-30 01:22:32,303 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:22:32,303 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1207 transitions. [2023-08-30 01:22:32,304 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 120.7) internal successors, (1207), 10 states have internal predecessors, (1207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:22:32,306 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 359.0) internal successors, (3949), 11 states have internal predecessors, (3949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:22:32,306 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 359.0) internal successors, (3949), 11 states have internal predecessors, (3949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:22:32,306 INFO L175 Difference]: Start difference. First operand has 136 places, 121 transitions, 1113 flow. Second operand 10 states and 1207 transitions. [2023-08-30 01:22:32,306 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 169 transitions, 1785 flow [2023-08-30 01:22:32,475 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 169 transitions, 1711 flow, removed 30 selfloop flow, removed 7 redundant places. [2023-08-30 01:22:32,477 INFO L231 Difference]: Finished difference. Result has 138 places, 108 transitions, 962 flow [2023-08-30 01:22:32,477 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=359, PETRI_DIFFERENCE_MINUEND_FLOW=1063, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=962, PETRI_PLACES=138, PETRI_TRANSITIONS=108} [2023-08-30 01:22:32,477 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 100 predicate places. [2023-08-30 01:22:32,477 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 108 transitions, 962 flow [2023-08-30 01:22:32,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 117.66666666666667) internal successors, (1412), 12 states have internal predecessors, (1412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:22:32,478 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:22:32,478 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 01:22:32,487 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2023-08-30 01:22:32,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:22:32,681 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-08-30 01:22:32,681 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:22:32,696 INFO L85 PathProgramCache]: Analyzing trace with hash -1043230612, now seen corresponding path program 2 times [2023-08-30 01:22:32,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:22:32,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [488280632] [2023-08-30 01:22:32,697 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 01:22:32,697 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:22:32,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:22:32,698 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 01:22:32,701 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2023-08-30 01:22:32,846 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 01:22:32,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 01:22:32,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 26 conjunts are in the unsatisfiable core [2023-08-30 01:22:32,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:22:33,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 01:22:33,418 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 01:22:33,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 01:22:33,425 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 01:22:33,426 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 01:22:33,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 01:22:33,433 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 01:22:33,668 INFO L321 Elim1Store]: treesize reduction 348, result has 6.7 percent of original size [2023-08-30 01:22:33,668 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 6 disjoint index pairs (out of 66 index pairs), introduced 16 new quantified variables, introduced 66 case distinctions, treesize of input 217 treesize of output 111 [2023-08-30 01:22:33,917 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 01:22:33,917 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 01:22:35,936 INFO L321 Elim1Store]: treesize reduction 566, result has 15.9 percent of original size [2023-08-30 01:22:35,937 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 16 new quantified variables, introduced 66 case distinctions, treesize of input 340 treesize of output 201 [2023-08-30 01:23:51,433 WARN L222 SmtUtils]: Spent 23.24s on a formula simplification. DAG size of input: 1448 DAG size of output: 36 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 01:23:52,630 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 2 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 01:23:52,630 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:23:52,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [488280632] [2023-08-30 01:23:52,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [488280632] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 01:23:52,630 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 01:23:52,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-30 01:23:52,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141091832] [2023-08-30 01:23:52,631 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 01:23:52,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 01:23:52,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:23:52,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 01:23:52,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=95, Unknown=4, NotChecked=0, Total=132 [2023-08-30 01:23:59,686 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 359 [2023-08-30 01:23:59,687 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 108 transitions, 962 flow. Second operand has 12 states, 12 states have (on average 117.66666666666667) internal successors, (1412), 12 states have internal predecessors, (1412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:23:59,687 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:23:59,687 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 359 [2023-08-30 01:23:59,687 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:24:05,010 INFO L130 PetriNetUnfolder]: 5285/9612 cut-off events. [2023-08-30 01:24:05,010 INFO L131 PetriNetUnfolder]: For 46304/47284 co-relation queries the response was YES. [2023-08-30 01:24:05,046 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46596 conditions, 9612 events. 5285/9612 cut-off events. For 46304/47284 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 66550 event pairs, 914 based on Foata normal form. 728/10203 useless extension candidates. Maximal degree in co-relation 46535. Up to 8950 conditions per place. [2023-08-30 01:24:05,069 INFO L137 encePairwiseOnDemand]: 352/359 looper letters, 90 selfloop transitions, 9 changer transitions 23/129 dead transitions. [2023-08-30 01:24:05,069 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 129 transitions, 1335 flow [2023-08-30 01:24:05,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-30 01:24:05,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-30 01:24:05,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1197 transitions. [2023-08-30 01:24:05,070 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3334261838440111 [2023-08-30 01:24:05,070 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1197 transitions. [2023-08-30 01:24:05,070 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1197 transitions. [2023-08-30 01:24:05,070 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:24:05,071 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1197 transitions. [2023-08-30 01:24:05,072 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 119.7) internal successors, (1197), 10 states have internal predecessors, (1197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:24:05,074 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 359.0) internal successors, (3949), 11 states have internal predecessors, (3949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:24:05,074 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 359.0) internal successors, (3949), 11 states have internal predecessors, (3949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:24:05,074 INFO L175 Difference]: Start difference. First operand has 138 places, 108 transitions, 962 flow. Second operand 10 states and 1197 transitions. [2023-08-30 01:24:05,074 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 129 transitions, 1335 flow [2023-08-30 01:24:05,222 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 129 transitions, 1294 flow, removed 9 selfloop flow, removed 9 redundant places. [2023-08-30 01:24:05,224 INFO L231 Difference]: Finished difference. Result has 136 places, 103 transitions, 887 flow [2023-08-30 01:24:05,224 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=359, PETRI_DIFFERENCE_MINUEND_FLOW=921, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=887, PETRI_PLACES=136, PETRI_TRANSITIONS=103} [2023-08-30 01:24:05,224 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 98 predicate places. [2023-08-30 01:24:05,225 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 103 transitions, 887 flow [2023-08-30 01:24:05,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 117.66666666666667) internal successors, (1412), 12 states have internal predecessors, (1412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:24:05,225 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:24:05,225 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 01:24:05,235 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2023-08-30 01:24:05,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:24:05,432 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-08-30 01:24:05,432 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:24:05,432 INFO L85 PathProgramCache]: Analyzing trace with hash -450113443, now seen corresponding path program 6 times [2023-08-30 01:24:05,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:24:05,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [648926659] [2023-08-30 01:24:05,433 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 01:24:05,433 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:24:05,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:24:05,434 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 01:24:05,434 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2023-08-30 01:24:05,540 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-30 01:24:05,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 01:24:05,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-30 01:24:05,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:24:05,796 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 01:24:05,796 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 01:24:06,195 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 01:24:06,195 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:24:06,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [648926659] [2023-08-30 01:24:06,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [648926659] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 01:24:06,196 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 01:24:06,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2023-08-30 01:24:06,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921566739] [2023-08-30 01:24:06,196 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 01:24:06,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 01:24:06,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:24:06,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 01:24:06,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2023-08-30 01:24:06,961 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 359 [2023-08-30 01:24:06,962 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 103 transitions, 887 flow. Second operand has 12 states, 12 states have (on average 149.91666666666666) internal successors, (1799), 12 states have internal predecessors, (1799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:24:06,962 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:24:06,962 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 359 [2023-08-30 01:24:06,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:24:10,587 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 01:24:12,629 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 01:24:15,093 INFO L130 PetriNetUnfolder]: 6444/11465 cut-off events. [2023-08-30 01:24:15,094 INFO L131 PetriNetUnfolder]: For 45322/45322 co-relation queries the response was YES. [2023-08-30 01:24:15,145 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53018 conditions, 11465 events. 6444/11465 cut-off events. For 45322/45322 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 78474 event pairs, 1672 based on Foata normal form. 380/11845 useless extension candidates. Maximal degree in co-relation 52959. Up to 7039 conditions per place. [2023-08-30 01:24:15,178 INFO L137 encePairwiseOnDemand]: 353/359 looper letters, 111 selfloop transitions, 47 changer transitions 2/160 dead transitions. [2023-08-30 01:24:15,179 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 160 transitions, 1582 flow [2023-08-30 01:24:15,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 01:24:15,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 01:24:15,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1852 transitions. [2023-08-30 01:24:15,182 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4298978644382544 [2023-08-30 01:24:15,182 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1852 transitions. [2023-08-30 01:24:15,182 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1852 transitions. [2023-08-30 01:24:15,183 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:24:15,183 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1852 transitions. [2023-08-30 01:24:15,185 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 154.33333333333334) internal successors, (1852), 12 states have internal predecessors, (1852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:24:15,188 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 359.0) internal successors, (4667), 13 states have internal predecessors, (4667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:24:15,189 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 359.0) internal successors, (4667), 13 states have internal predecessors, (4667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:24:15,189 INFO L175 Difference]: Start difference. First operand has 136 places, 103 transitions, 887 flow. Second operand 12 states and 1852 transitions. [2023-08-30 01:24:15,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 160 transitions, 1582 flow [2023-08-30 01:24:15,414 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 160 transitions, 1458 flow, removed 47 selfloop flow, removed 9 redundant places. [2023-08-30 01:24:15,416 INFO L231 Difference]: Finished difference. Result has 135 places, 123 transitions, 1128 flow [2023-08-30 01:24:15,416 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=359, PETRI_DIFFERENCE_MINUEND_FLOW=815, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1128, PETRI_PLACES=135, PETRI_TRANSITIONS=123} [2023-08-30 01:24:15,417 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 97 predicate places. [2023-08-30 01:24:15,417 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 123 transitions, 1128 flow [2023-08-30 01:24:15,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 149.91666666666666) internal successors, (1799), 12 states have internal predecessors, (1799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:24:15,417 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:24:15,417 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 01:24:15,425 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2023-08-30 01:24:15,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:24:15,621 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-08-30 01:24:15,621 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:24:15,621 INFO L85 PathProgramCache]: Analyzing trace with hash 1533238626, now seen corresponding path program 3 times [2023-08-30 01:24:15,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:24:15,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [227521012] [2023-08-30 01:24:15,622 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 01:24:15,622 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:24:15,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:24:15,623 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 01:24:15,624 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2023-08-30 01:24:15,727 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 01:24:15,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 01:24:15,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 01:24:15,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:24:16,392 INFO L321 Elim1Store]: treesize reduction 162, result has 19.4 percent of original size [2023-08-30 01:24:16,392 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 12 new quantified variables, introduced 28 case distinctions, treesize of input 313 treesize of output 112 [2023-08-30 01:24:17,804 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 01:24:17,804 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 01:24:27,013 INFO L321 Elim1Store]: treesize reduction 1042, result has 17.1 percent of original size [2023-08-30 01:24:27,014 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 16 select indices, 16 select index equivalence classes, 0 disjoint index pairs (out of 120 index pairs), introduced 24 new quantified variables, introduced 120 case distinctions, treesize of input 413 treesize of output 348 [2023-08-30 01:26:43,357 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 01:26:43,358 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:26:43,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [227521012] [2023-08-30 01:26:43,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [227521012] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 01:26:43,358 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 01:26:43,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-08-30 01:26:43,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665695325] [2023-08-30 01:26:43,358 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 01:26:43,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 01:26:43,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:26:43,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 01:26:43,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=64, Unknown=2, NotChecked=0, Total=90 [2023-08-30 01:26:43,691 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 359 [2023-08-30 01:26:43,692 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 123 transitions, 1128 flow. Second operand has 10 states, 10 states have (on average 135.2) internal successors, (1352), 10 states have internal predecessors, (1352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:26:43,692 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:26:43,692 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 359 [2023-08-30 01:26:43,692 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:26:47,272 INFO L130 PetriNetUnfolder]: 7812/13935 cut-off events. [2023-08-30 01:26:47,272 INFO L131 PetriNetUnfolder]: For 52580/53169 co-relation queries the response was YES. [2023-08-30 01:26:47,325 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69013 conditions, 13935 events. 7812/13935 cut-off events. For 52580/53169 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 100466 event pairs, 608 based on Foata normal form. 627/14410 useless extension candidates. Maximal degree in co-relation 68954. Up to 7753 conditions per place. [2023-08-30 01:26:47,359 INFO L137 encePairwiseOnDemand]: 354/359 looper letters, 120 selfloop transitions, 55 changer transitions 1/183 dead transitions. [2023-08-30 01:26:47,359 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 183 transitions, 1887 flow [2023-08-30 01:26:47,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 01:26:47,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 01:26:47,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1117 transitions. [2023-08-30 01:26:47,362 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3889275766016713 [2023-08-30 01:26:47,362 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1117 transitions. [2023-08-30 01:26:47,363 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1117 transitions. [2023-08-30 01:26:47,363 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:26:47,363 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1117 transitions. [2023-08-30 01:26:47,364 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 139.625) internal successors, (1117), 8 states have internal predecessors, (1117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:26:47,365 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 359.0) internal successors, (3231), 9 states have internal predecessors, (3231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:26:47,365 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 359.0) internal successors, (3231), 9 states have internal predecessors, (3231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:26:47,365 INFO L175 Difference]: Start difference. First operand has 135 places, 123 transitions, 1128 flow. Second operand 8 states and 1117 transitions. [2023-08-30 01:26:47,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 183 transitions, 1887 flow [2023-08-30 01:26:47,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 183 transitions, 1775 flow, removed 34 selfloop flow, removed 6 redundant places. [2023-08-30 01:26:47,691 INFO L231 Difference]: Finished difference. Result has 140 places, 148 transitions, 1474 flow [2023-08-30 01:26:47,691 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=359, PETRI_DIFFERENCE_MINUEND_FLOW=1025, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1474, PETRI_PLACES=140, PETRI_TRANSITIONS=148} [2023-08-30 01:26:47,692 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 102 predicate places. [2023-08-30 01:26:47,692 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 148 transitions, 1474 flow [2023-08-30 01:26:47,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 135.2) internal successors, (1352), 10 states have internal predecessors, (1352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:26:47,692 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:26:47,692 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 01:26:47,700 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 (27)] Ended with exit code 0 [2023-08-30 01:26:47,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:26:47,893 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-08-30 01:26:47,893 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:26:47,893 INFO L85 PathProgramCache]: Analyzing trace with hash 95170566, now seen corresponding path program 4 times [2023-08-30 01:26:47,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:26:47,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [246187136] [2023-08-30 01:26:47,893 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 01:26:47,894 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:26:47,894 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:26:47,895 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 01:26:47,896 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2023-08-30 01:26:47,995 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 01:26:47,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 01:26:48,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 01:26:48,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:26:48,604 INFO L321 Elim1Store]: treesize reduction 162, result has 19.4 percent of original size [2023-08-30 01:26:48,604 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 12 new quantified variables, introduced 28 case distinctions, treesize of input 313 treesize of output 112 [2023-08-30 01:26:49,872 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 01:26:49,872 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 01:26:59,433 WARN L222 SmtUtils]: Spent 5.23s on a formula simplification. DAG size of input: 471 DAG size of output: 108 (called from [L 318] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2023-08-30 01:26:59,434 INFO L321 Elim1Store]: treesize reduction 1042, result has 17.1 percent of original size [2023-08-30 01:26:59,434 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 16 select indices, 16 select index equivalence classes, 0 disjoint index pairs (out of 120 index pairs), introduced 24 new quantified variables, introduced 120 case distinctions, treesize of input 413 treesize of output 348 [2023-08-30 01:29:48,404 WARN L222 SmtUtils]: Spent 5.27s on a formula simplification. DAG size of input: 5630 DAG size of output: 5630 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-08-30 01:31:33,421 WARN L222 SmtUtils]: Spent 20.21s on a formula simplification. DAG size of input: 5919 DAG size of output: 6066 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) Killed by 15