./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/popl20-more-mts.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/popl20-more-mts.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 9d38eb9d6ba70070fe3ced1aec90f1c3400cc1f89786e1bd625a19020cb0869f --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 03:24:57,663 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 03:24:57,665 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 03:24:57,690 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 03:24:57,691 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 03:24:57,695 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 03:24:57,698 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 03:24:57,701 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 03:24:57,703 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 03:24:57,708 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 03:24:57,709 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 03:24:57,712 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 03:24:57,712 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 03:24:57,714 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 03:24:57,716 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 03:24:57,720 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 03:24:57,721 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 03:24:57,722 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 03:24:57,725 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 03:24:57,727 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 03:24:57,727 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 03:24:57,741 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 03:24:57,742 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 03:24:57,742 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 03:24:57,744 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 03:24:57,744 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 03:24:57,745 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 03:24:57,745 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 03:24:57,745 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 03:24:57,746 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 03:24:57,746 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 03:24:57,747 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 03:24:57,747 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 03:24:57,748 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 03:24:57,749 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 03:24:57,749 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 03:24:57,750 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 03:24:57,750 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 03:24:57,750 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 03:24:57,751 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 03:24:57,751 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 03:24:57,753 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-09-01 03:24:57,780 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 03:24:57,781 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 03:24:57,782 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 03:24:57,782 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 03:24:57,782 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 03:24:57,783 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 03:24:57,783 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 03:24:57,783 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 03:24:57,783 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 03:24:57,784 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 03:24:57,784 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 03:24:57,784 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-09-01 03:24:57,785 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 03:24:57,785 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 03:24:57,785 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 03:24:57,785 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-09-01 03:24:57,785 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-09-01 03:24:57,785 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-09-01 03:24:57,785 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 03:24:57,786 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-09-01 03:24:57,786 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 03:24:57,786 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 03:24:57,786 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 03:24:57,786 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 03:24:57,786 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 03:24:57,787 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 03:24:57,787 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 03:24:57,787 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 03:24:57,787 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 03:24:57,787 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 03:24:57,787 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 03:24:57,787 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 03:24:57,788 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 03:24:57,788 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 03:24:57,788 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9d38eb9d6ba70070fe3ced1aec90f1c3400cc1f89786e1bd625a19020cb0869f Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 03:24:58,109 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 03:24:58,136 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 03:24:58,138 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 03:24:58,139 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 03:24:58,139 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 03:24:58,141 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-mts.wvr.c [2023-09-01 03:24:59,315 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 03:24:59,445 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 03:24:59,445 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-mts.wvr.c [2023-09-01 03:24:59,450 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/711ddbb96/8d419a7264a342f4b370375bc870b4a4/FLAGa84c2a841 [2023-09-01 03:24:59,858 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/711ddbb96/8d419a7264a342f4b370375bc870b4a4 [2023-09-01 03:24:59,860 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 03:24:59,861 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 03:24:59,865 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 03:24:59,867 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 03:24:59,870 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 03:24:59,877 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 03:24:59" (1/1) ... [2023-09-01 03:24:59,878 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@ebf5b41 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:24:59, skipping insertion in model container [2023-09-01 03:24:59,878 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 03:24:59" (1/1) ... [2023-09-01 03:24:59,882 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 03:24:59,898 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 03:25:00,051 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-mts.wvr.c[2533,2546] [2023-09-01 03:25:00,058 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 03:25:00,065 ERROR L324 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2023-09-01 03:25:00,065 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@6aa1fb09 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:25:00, skipping insertion in model container [2023-09-01 03:25:00,065 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 03:25:00,066 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-09-01 03:25:00,067 INFO L158 Benchmark]: Toolchain (without parser) took 205.72ms. Allocated memory is still 81.8MB. Free memory was 61.2MB in the beginning and 51.2MB in the end (delta: 9.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-09-01 03:25:00,085 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 62.9MB. Free memory is still 40.5MB. There was no memory consumed. Max. memory is 16.1GB. [2023-09-01 03:25:00,085 INFO L158 Benchmark]: CACSL2BoogieTranslator took 200.33ms. Allocated memory is still 81.8MB. Free memory was 60.9MB in the beginning and 51.2MB in the end (delta: 9.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-09-01 03:25:00,086 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 62.9MB. Free memory is still 40.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 200.33ms. Allocated memory is still 81.8MB. Free memory was 60.9MB in the beginning and 51.2MB in the end (delta: 9.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 101]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/popl20-more-mts.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 9d38eb9d6ba70070fe3ced1aec90f1c3400cc1f89786e1bd625a19020cb0869f --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 03:25:02,049 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 03:25:02,051 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 03:25:02,090 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 03:25:02,091 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 03:25:02,091 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 03:25:02,092 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 03:25:02,094 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 03:25:02,095 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 03:25:02,096 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 03:25:02,097 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 03:25:02,098 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 03:25:02,098 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 03:25:02,099 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 03:25:02,100 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 03:25:02,101 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 03:25:02,102 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 03:25:02,103 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 03:25:02,104 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 03:25:02,105 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 03:25:02,106 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 03:25:02,107 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 03:25:02,108 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 03:25:02,109 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 03:25:02,111 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 03:25:02,111 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 03:25:02,111 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 03:25:02,112 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 03:25:02,112 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 03:25:02,113 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 03:25:02,113 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 03:25:02,114 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 03:25:02,114 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 03:25:02,115 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 03:25:02,116 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 03:25:02,118 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 03:25:02,119 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 03:25:02,119 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 03:25:02,119 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 03:25:02,120 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 03:25:02,128 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 03:25:02,129 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-09-01 03:25:02,155 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 03:25:02,155 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 03:25:02,156 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 03:25:02,156 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 03:25:02,157 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 03:25:02,157 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 03:25:02,158 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 03:25:02,158 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 03:25:02,159 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 03:25:02,159 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 03:25:02,159 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 03:25:02,159 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-09-01 03:25:02,160 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 03:25:02,160 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 03:25:02,160 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 03:25:02,160 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-09-01 03:25:02,160 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-09-01 03:25:02,160 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-09-01 03:25:02,160 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 03:25:02,161 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-09-01 03:25:02,161 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-09-01 03:25:02,161 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-09-01 03:25:02,161 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 03:25:02,161 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 03:25:02,161 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 03:25:02,161 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 03:25:02,162 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 03:25:02,162 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 03:25:02,162 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 03:25:02,162 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 03:25:02,162 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-09-01 03:25:02,162 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-09-01 03:25:02,162 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 03:25:02,163 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 03:25:02,163 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 03:25:02,163 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-09-01 03:25:02,163 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 03:25:02,163 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9d38eb9d6ba70070fe3ced1aec90f1c3400cc1f89786e1bd625a19020cb0869f Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 03:25:02,431 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 03:25:02,468 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 03:25:02,470 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 03:25:02,471 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 03:25:02,473 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 03:25:02,475 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-mts.wvr.c [2023-09-01 03:25:03,717 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 03:25:03,953 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 03:25:03,954 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-mts.wvr.c [2023-09-01 03:25:03,990 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e1a96ff0b/7275a1ed9c1a4bad8a10c166e162230c/FLAG1e6e8d51b [2023-09-01 03:25:04,015 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e1a96ff0b/7275a1ed9c1a4bad8a10c166e162230c [2023-09-01 03:25:04,018 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 03:25:04,019 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 03:25:04,022 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 03:25:04,022 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 03:25:04,025 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 03:25:04,026 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 03:25:04" (1/1) ... [2023-09-01 03:25:04,028 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5755489a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:25:04, skipping insertion in model container [2023-09-01 03:25:04,029 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 03:25:04" (1/1) ... [2023-09-01 03:25:04,034 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 03:25:04,053 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 03:25:04,237 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-mts.wvr.c[2533,2546] [2023-09-01 03:25:04,252 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 03:25:04,268 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-09-01 03:25:04,275 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 03:25:04,294 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-mts.wvr.c[2533,2546] [2023-09-01 03:25:04,299 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 03:25:04,305 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 03:25:04,334 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-mts.wvr.c[2533,2546] [2023-09-01 03:25:04,339 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 03:25:04,347 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 03:25:04,347 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 03:25:04,352 INFO L208 MainTranslator]: Completed translation [2023-09-01 03:25:04,352 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:25:04 WrapperNode [2023-09-01 03:25:04,352 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 03:25:04,353 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 03:25:04,353 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 03:25:04,354 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 03:25:04,358 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:25:04" (1/1) ... [2023-09-01 03:25:04,377 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:25:04" (1/1) ... [2023-09-01 03:25:04,409 INFO L138 Inliner]: procedures = 27, calls = 46, calls flagged for inlining = 13, calls inlined = 19, statements flattened = 221 [2023-09-01 03:25:04,411 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 03:25:04,411 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 03:25:04,412 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 03:25:04,412 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 03:25:04,418 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:25:04" (1/1) ... [2023-09-01 03:25:04,419 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:25:04" (1/1) ... [2023-09-01 03:25:04,434 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:25:04" (1/1) ... [2023-09-01 03:25:04,435 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:25:04" (1/1) ... [2023-09-01 03:25:04,443 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:25:04" (1/1) ... [2023-09-01 03:25:04,447 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:25:04" (1/1) ... [2023-09-01 03:25:04,449 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:25:04" (1/1) ... [2023-09-01 03:25:04,450 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:25:04" (1/1) ... [2023-09-01 03:25:04,452 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 03:25:04,453 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 03:25:04,453 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 03:25:04,453 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 03:25:04,454 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:25:04" (1/1) ... [2023-09-01 03:25:04,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 03:25:04,481 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 03:25:04,503 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-09-01 03:25:04,506 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-09-01 03:25:04,554 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 03:25:04,554 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-09-01 03:25:04,555 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 03:25:04,555 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-09-01 03:25:04,555 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-09-01 03:25:04,555 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-09-01 03:25:04,555 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-09-01 03:25:04,555 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-09-01 03:25:04,555 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-09-01 03:25:04,556 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-09-01 03:25:04,556 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-09-01 03:25:04,556 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-09-01 03:25:04,556 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-09-01 03:25:04,556 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 03:25:04,556 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 03:25:04,556 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 03:25:04,556 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-09-01 03:25:04,558 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-09-01 03:25:04,636 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 03:25:04,637 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 03:25:05,168 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 03:25:05,335 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 03:25:05,336 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-09-01 03:25:05,339 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 03:25:05 BoogieIcfgContainer [2023-09-01 03:25:05,339 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 03:25:05,341 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 03:25:05,341 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 03:25:05,344 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 03:25:05,344 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 03:25:04" (1/3) ... [2023-09-01 03:25:05,345 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25d98064 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 03:25:05, skipping insertion in model container [2023-09-01 03:25:05,345 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:25:04" (2/3) ... [2023-09-01 03:25:05,346 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25d98064 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 03:25:05, skipping insertion in model container [2023-09-01 03:25:05,346 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 03:25:05" (3/3) ... [2023-09-01 03:25:05,347 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-mts.wvr.c [2023-09-01 03:25:05,361 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 03:25:05,361 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 30 error locations. [2023-09-01 03:25:05,361 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 03:25:05,464 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-09-01 03:25:05,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 225 places, 233 transitions, 490 flow [2023-09-01 03:25:05,591 INFO L130 PetriNetUnfolder]: 18/230 cut-off events. [2023-09-01 03:25:05,591 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-09-01 03:25:05,596 INFO L83 FinitePrefix]: Finished finitePrefix Result has 243 conditions, 230 events. 18/230 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 456 event pairs, 0 based on Foata normal form. 0/182 useless extension candidates. Maximal degree in co-relation 179. Up to 2 conditions per place. [2023-09-01 03:25:05,596 INFO L82 GeneralOperation]: Start removeDead. Operand has 225 places, 233 transitions, 490 flow [2023-09-01 03:25:05,600 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 218 places, 226 transitions, 470 flow [2023-09-01 03:25:05,602 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 03:25:05,624 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 218 places, 226 transitions, 470 flow [2023-09-01 03:25:05,628 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 218 places, 226 transitions, 470 flow [2023-09-01 03:25:05,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 218 places, 226 transitions, 470 flow [2023-09-01 03:25:05,680 INFO L130 PetriNetUnfolder]: 18/226 cut-off events. [2023-09-01 03:25:05,681 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-09-01 03:25:05,685 INFO L83 FinitePrefix]: Finished finitePrefix Result has 239 conditions, 226 events. 18/226 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 454 event pairs, 0 based on Foata normal form. 0/179 useless extension candidates. Maximal degree in co-relation 179. Up to 2 conditions per place. [2023-09-01 03:25:05,689 INFO L119 LiptonReduction]: Number of co-enabled transitions 10284 [2023-09-01 03:25:29,476 INFO L134 LiptonReduction]: Checked pairs total: 11639 [2023-09-01 03:25:29,476 INFO L136 LiptonReduction]: Total number of compositions: 246 [2023-09-01 03:25:29,486 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-09-01 03:25:29,492 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;@c8f238c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 03:25:29,493 INFO L358 AbstractCegarLoop]: Starting to check reachability of 47 error locations. [2023-09-01 03:25:29,504 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-09-01 03:25:29,505 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 03:25:29,506 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:25:29,506 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-09-01 03:25:29,506 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-09-01 03:25:29,510 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:25:29,510 INFO L85 PathProgramCache]: Analyzing trace with hash 33782, now seen corresponding path program 1 times [2023-09-01 03:25:29,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:25:29,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1311725871] [2023-09-01 03:25:29,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:25:29,518 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 [2023-09-01 03:25:29,519 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:25:29,521 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:25:29,522 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-09-01 03:25:29,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:25:29,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 9 conjunts are in the unsatisfiable core [2023-09-01 03:25:29,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:25:29,830 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-09-01 03:25:29,831 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-09-01 03:25:29,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:25:29,869 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:25:29,870 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:25:29,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1311725871] [2023-09-01 03:25:29,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1311725871] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:25:29,871 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:25:29,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 03:25:29,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459440641] [2023-09-01 03:25:29,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:25:29,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 03:25:29,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:25:29,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 03:25:29,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 03:25:30,144 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 202 out of 479 [2023-09-01 03:25:30,147 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 55 transitions, 128 flow. Second operand has 3 states, 3 states have (on average 202.66666666666666) internal successors, (608), 3 states have internal predecessors, (608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:25:30,147 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:25:30,147 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 202 of 479 [2023-09-01 03:25:30,147 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:25:31,472 INFO L130 PetriNetUnfolder]: 7419/9490 cut-off events. [2023-09-01 03:25:31,473 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2023-09-01 03:25:31,480 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19157 conditions, 9490 events. 7419/9490 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 770. Compared 45174 event pairs, 3802 based on Foata normal form. 0/3100 useless extension candidates. Maximal degree in co-relation 8432. Up to 4711 conditions per place. [2023-09-01 03:25:31,528 INFO L137 encePairwiseOnDemand]: 467/479 looper letters, 82 selfloop transitions, 2 changer transitions 0/87 dead transitions. [2023-09-01 03:25:31,529 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 87 transitions, 378 flow [2023-09-01 03:25:31,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 03:25:31,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 03:25:31,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 709 transitions. [2023-09-01 03:25:31,544 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4933890048712596 [2023-09-01 03:25:31,545 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 709 transitions. [2023-09-01 03:25:31,546 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 709 transitions. [2023-09-01 03:25:31,551 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:25:31,553 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 709 transitions. [2023-09-01 03:25:31,558 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 236.33333333333334) internal successors, (709), 3 states have internal predecessors, (709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:25:31,563 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 479.0) internal successors, (1916), 4 states have internal predecessors, (1916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:25:31,564 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 479.0) internal successors, (1916), 4 states have internal predecessors, (1916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:25:31,566 INFO L175 Difference]: Start difference. First operand has 61 places, 55 transitions, 128 flow. Second operand 3 states and 709 transitions. [2023-09-01 03:25:31,566 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 87 transitions, 378 flow [2023-09-01 03:25:31,575 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 87 transitions, 354 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-09-01 03:25:31,577 INFO L231 Difference]: Finished difference. Result has 49 places, 47 transitions, 110 flow [2023-09-01 03:25:31,578 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=110, PETRI_PLACES=49, PETRI_TRANSITIONS=47} [2023-09-01 03:25:31,580 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, -12 predicate places. [2023-09-01 03:25:31,581 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 47 transitions, 110 flow [2023-09-01 03:25:31,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 202.66666666666666) internal successors, (608), 3 states have internal predecessors, (608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:25:31,581 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:25:31,582 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-09-01 03:25:31,604 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 [2023-09-01 03:25:31,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:25:31,790 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-09-01 03:25:31,791 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:25:31,791 INFO L85 PathProgramCache]: Analyzing trace with hash 33781, now seen corresponding path program 1 times [2023-09-01 03:25:31,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:25:31,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [815278551] [2023-09-01 03:25:31,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:25:31,792 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:25:31,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:25:31,805 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:25:31,812 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-09-01 03:25:31,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:25:31,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 3 conjunts are in the unsatisfiable core [2023-09-01 03:25:31,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:25:31,979 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-09-01 03:25:31,979 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2023-09-01 03:25:32,005 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:25:32,006 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:25:32,006 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:25:32,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [815278551] [2023-09-01 03:25:32,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [815278551] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:25:32,007 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:25:32,008 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 03:25:32,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569768248] [2023-09-01 03:25:32,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:25:32,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 03:25:32,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:25:32,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 03:25:32,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 03:25:32,126 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 202 out of 479 [2023-09-01 03:25:32,127 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 47 transitions, 110 flow. Second operand has 3 states, 3 states have (on average 202.66666666666666) internal successors, (608), 3 states have internal predecessors, (608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:25:32,127 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:25:32,128 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 202 of 479 [2023-09-01 03:25:32,128 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:25:33,260 INFO L130 PetriNetUnfolder]: 7419/9488 cut-off events. [2023-09-01 03:25:33,260 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2023-09-01 03:25:33,267 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18999 conditions, 9488 events. 7419/9488 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 770. Compared 45141 event pairs, 3802 based on Foata normal form. 0/3095 useless extension candidates. Maximal degree in co-relation 9497. Up to 9416 conditions per place. [2023-09-01 03:25:33,312 INFO L137 encePairwiseOnDemand]: 477/479 looper letters, 42 selfloop transitions, 1 changer transitions 0/46 dead transitions. [2023-09-01 03:25:33,312 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 46 transitions, 194 flow [2023-09-01 03:25:33,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 03:25:33,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 03:25:33,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 649 transitions. [2023-09-01 03:25:33,315 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4516353514265832 [2023-09-01 03:25:33,315 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 649 transitions. [2023-09-01 03:25:33,315 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 649 transitions. [2023-09-01 03:25:33,315 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:25:33,315 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 649 transitions. [2023-09-01 03:25:33,317 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 216.33333333333334) internal successors, (649), 3 states have internal predecessors, (649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:25:33,320 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 479.0) internal successors, (1916), 4 states have internal predecessors, (1916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:25:33,320 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 479.0) internal successors, (1916), 4 states have internal predecessors, (1916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:25:33,321 INFO L175 Difference]: Start difference. First operand has 49 places, 47 transitions, 110 flow. Second operand 3 states and 649 transitions. [2023-09-01 03:25:33,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 46 transitions, 194 flow [2023-09-01 03:25:33,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 46 transitions, 192 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 03:25:33,323 INFO L231 Difference]: Finished difference. Result has 49 places, 46 transitions, 108 flow [2023-09-01 03:25:33,323 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=108, PETRI_PLACES=49, PETRI_TRANSITIONS=46} [2023-09-01 03:25:33,324 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, -12 predicate places. [2023-09-01 03:25:33,324 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 46 transitions, 108 flow [2023-09-01 03:25:33,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 202.66666666666666) internal successors, (608), 3 states have internal predecessors, (608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:25:33,326 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:25:33,326 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-09-01 03:25:33,337 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 [2023-09-01 03:25:33,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:25:33,533 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-09-01 03:25:33,538 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:25:33,538 INFO L85 PathProgramCache]: Analyzing trace with hash 33873, now seen corresponding path program 1 times [2023-09-01 03:25:33,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:25:33,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [670638131] [2023-09-01 03:25:33,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:25:33,539 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:25:33,539 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:25:33,549 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:25:33,552 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-09-01 03:25:33,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:25:33,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 10 conjunts are in the unsatisfiable core [2023-09-01 03:25:33,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:25:33,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:25:33,645 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:25:33,646 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:25:33,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [670638131] [2023-09-01 03:25:33,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [670638131] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:25:33,648 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:25:33,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 03:25:33,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83394743] [2023-09-01 03:25:33,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:25:33,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 03:25:33,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:25:33,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 03:25:33,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 03:25:33,695 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 204 out of 479 [2023-09-01 03:25:33,696 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 46 transitions, 108 flow. Second operand has 3 states, 3 states have (on average 204.66666666666666) internal successors, (614), 3 states have internal predecessors, (614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:25:33,696 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:25:33,696 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 204 of 479 [2023-09-01 03:25:33,696 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:25:34,317 INFO L130 PetriNetUnfolder]: 3710/4746 cut-off events. [2023-09-01 03:25:34,318 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-09-01 03:25:34,323 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9508 conditions, 4746 events. 3710/4746 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 20488 event pairs, 1901 based on Foata normal form. 1/1550 useless extension candidates. Maximal degree in co-relation 9500. Up to 4710 conditions per place. [2023-09-01 03:25:34,342 INFO L137 encePairwiseOnDemand]: 474/479 looper letters, 41 selfloop transitions, 2 changer transitions 0/46 dead transitions. [2023-09-01 03:25:34,342 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 46 transitions, 194 flow [2023-09-01 03:25:34,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 03:25:34,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 03:25:34,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 658 transitions. [2023-09-01 03:25:34,345 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45789839944328464 [2023-09-01 03:25:34,345 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 658 transitions. [2023-09-01 03:25:34,345 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 658 transitions. [2023-09-01 03:25:34,346 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:25:34,346 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 658 transitions. [2023-09-01 03:25:34,348 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 219.33333333333334) internal successors, (658), 3 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:25:34,350 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 479.0) internal successors, (1916), 4 states have internal predecessors, (1916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:25:34,351 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 479.0) internal successors, (1916), 4 states have internal predecessors, (1916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:25:34,351 INFO L175 Difference]: Start difference. First operand has 49 places, 46 transitions, 108 flow. Second operand 3 states and 658 transitions. [2023-09-01 03:25:34,352 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 46 transitions, 194 flow [2023-09-01 03:25:34,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 46 transitions, 191 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-09-01 03:25:34,357 INFO L231 Difference]: Finished difference. Result has 51 places, 46 transitions, 117 flow [2023-09-01 03:25:34,358 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=105, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=117, PETRI_PLACES=51, PETRI_TRANSITIONS=46} [2023-09-01 03:25:34,359 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, -10 predicate places. [2023-09-01 03:25:34,359 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 46 transitions, 117 flow [2023-09-01 03:25:34,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 204.66666666666666) internal successors, (614), 3 states have internal predecessors, (614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:25:34,360 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:25:34,360 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-09-01 03:25:34,367 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2023-09-01 03:25:34,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:25:34,567 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-09-01 03:25:34,570 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:25:34,570 INFO L85 PathProgramCache]: Analyzing trace with hash 1049774, now seen corresponding path program 1 times [2023-09-01 03:25:34,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:25:34,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [531426659] [2023-09-01 03:25:34,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:25:34,571 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:25:34,571 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:25:34,572 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:25:34,574 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-09-01 03:25:34,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:25:34,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 14 conjunts are in the unsatisfiable core [2023-09-01 03:25:34,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:25:34,707 INFO L321 Elim1Store]: treesize reduction 115, result has 16.1 percent of original size [2023-09-01 03:25:34,707 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 47 [2023-09-01 03:25:34,791 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 03:25:34,792 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:25:34,792 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:25:34,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [531426659] [2023-09-01 03:25:34,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [531426659] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:25:34,793 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:25:34,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 03:25:34,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807227487] [2023-09-01 03:25:34,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:25:34,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 03:25:34,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:25:34,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 03:25:34,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 03:25:34,986 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 202 out of 479 [2023-09-01 03:25:34,987 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 46 transitions, 117 flow. Second operand has 3 states, 3 states have (on average 203.0) internal successors, (609), 3 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:25:34,987 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:25:34,987 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 202 of 479 [2023-09-01 03:25:34,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:25:35,478 INFO L130 PetriNetUnfolder]: 2912/3767 cut-off events. [2023-09-01 03:25:35,478 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-09-01 03:25:35,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7555 conditions, 3767 events. 2912/3767 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 16047 event pairs, 1487 based on Foata normal form. 0/1297 useless extension candidates. Maximal degree in co-relation 7545. Up to 3731 conditions per place. [2023-09-01 03:25:35,497 INFO L137 encePairwiseOnDemand]: 476/479 looper letters, 40 selfloop transitions, 1 changer transitions 0/44 dead transitions. [2023-09-01 03:25:35,497 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 44 transitions, 193 flow [2023-09-01 03:25:35,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 03:25:35,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 03:25:35,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 648 transitions. [2023-09-01 03:25:35,500 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4509394572025052 [2023-09-01 03:25:35,500 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 648 transitions. [2023-09-01 03:25:35,500 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 648 transitions. [2023-09-01 03:25:35,500 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:25:35,500 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 648 transitions. [2023-09-01 03:25:35,502 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 216.0) internal successors, (648), 3 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:25:35,504 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 479.0) internal successors, (1916), 4 states have internal predecessors, (1916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:25:35,504 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 479.0) internal successors, (1916), 4 states have internal predecessors, (1916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:25:35,504 INFO L175 Difference]: Start difference. First operand has 51 places, 46 transitions, 117 flow. Second operand 3 states and 648 transitions. [2023-09-01 03:25:35,505 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 44 transitions, 193 flow [2023-09-01 03:25:35,506 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 44 transitions, 189 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 03:25:35,507 INFO L231 Difference]: Finished difference. Result has 49 places, 44 transitions, 109 flow [2023-09-01 03:25:35,507 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=107, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=109, PETRI_PLACES=49, PETRI_TRANSITIONS=44} [2023-09-01 03:25:35,508 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, -12 predicate places. [2023-09-01 03:25:35,508 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 44 transitions, 109 flow [2023-09-01 03:25:35,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 203.0) internal successors, (609), 3 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:25:35,509 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:25:35,509 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-09-01 03:25:35,519 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 [2023-09-01 03:25:35,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:25:35,717 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-09-01 03:25:35,717 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:25:35,717 INFO L85 PathProgramCache]: Analyzing trace with hash 1049683, now seen corresponding path program 1 times [2023-09-01 03:25:35,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:25:35,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [218477381] [2023-09-01 03:25:35,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:25:35,719 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:25:35,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:25:35,720 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:25:35,722 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2023-09-01 03:25:35,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:25:35,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 11 conjunts are in the unsatisfiable core [2023-09-01 03:25:35,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:25:35,874 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-09-01 03:25:35,875 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-09-01 03:25:35,940 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:25:35,940 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:25:36,114 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:25:36,114 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:25:36,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [218477381] [2023-09-01 03:25:36,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [218477381] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:25:36,115 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:25:36,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-09-01 03:25:36,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887398900] [2023-09-01 03:25:36,115 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:25:36,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-09-01 03:25:36,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:25:36,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-09-01 03:25:36,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-09-01 03:25:36,784 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 197 out of 479 [2023-09-01 03:25:36,785 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 44 transitions, 109 flow. Second operand has 6 states, 6 states have (on average 198.0) internal successors, (1188), 6 states have internal predecessors, (1188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:25:36,785 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:25:36,785 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 197 of 479 [2023-09-01 03:25:36,785 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:25:38,072 INFO L130 PetriNetUnfolder]: 5827/7537 cut-off events. [2023-09-01 03:25:38,072 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2023-09-01 03:25:38,087 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15110 conditions, 7537 events. 5827/7537 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 590. Compared 35610 event pairs, 2974 based on Foata normal form. 0/2603 useless extension candidates. Maximal degree in co-relation 15100. Up to 3732 conditions per place. [2023-09-01 03:25:38,158 INFO L137 encePairwiseOnDemand]: 474/479 looper letters, 76 selfloop transitions, 9 changer transitions 0/88 dead transitions. [2023-09-01 03:25:38,158 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 88 transitions, 391 flow [2023-09-01 03:25:38,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 03:25:38,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 03:25:38,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1270 transitions. [2023-09-01 03:25:38,163 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.441892832289492 [2023-09-01 03:25:38,163 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1270 transitions. [2023-09-01 03:25:38,163 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1270 transitions. [2023-09-01 03:25:38,164 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:25:38,164 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1270 transitions. [2023-09-01 03:25:38,166 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 211.66666666666666) internal successors, (1270), 6 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:25:38,170 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 479.0) internal successors, (3353), 7 states have internal predecessors, (3353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:25:38,171 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 479.0) internal successors, (3353), 7 states have internal predecessors, (3353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:25:38,171 INFO L175 Difference]: Start difference. First operand has 49 places, 44 transitions, 109 flow. Second operand 6 states and 1270 transitions. [2023-09-01 03:25:38,171 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 88 transitions, 391 flow [2023-09-01 03:25:38,172 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 88 transitions, 390 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 03:25:38,174 INFO L231 Difference]: Finished difference. Result has 57 places, 51 transitions, 186 flow [2023-09-01 03:25:38,174 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=186, PETRI_PLACES=57, PETRI_TRANSITIONS=51} [2023-09-01 03:25:38,176 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, -4 predicate places. [2023-09-01 03:25:38,176 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 51 transitions, 186 flow [2023-09-01 03:25:38,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 198.0) internal successors, (1188), 6 states have internal predecessors, (1188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:25:38,177 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:25:38,177 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-09-01 03:25:38,195 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2023-09-01 03:25:38,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:25:38,385 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-09-01 03:25:38,386 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:25:38,386 INFO L85 PathProgramCache]: Analyzing trace with hash 1049775, now seen corresponding path program 1 times [2023-09-01 03:25:38,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:25:38,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2039501164] [2023-09-01 03:25:38,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:25:38,387 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:25:38,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:25:38,401 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:25:38,402 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2023-09-01 03:25:38,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:25:38,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 17 conjunts are in the unsatisfiable core [2023-09-01 03:25:38,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:25:38,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:25:38,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:25:38,570 INFO L321 Elim1Store]: treesize reduction 49, result has 38.8 percent of original size [2023-09-01 03:25:38,571 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 38 [2023-09-01 03:25:38,590 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-09-01 03:25:38,591 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 90 treesize of output 89 [2023-09-01 03:25:38,892 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:25:38,892 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:25:39,089 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:25:39,089 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:25:39,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2039501164] [2023-09-01 03:25:39,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2039501164] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:25:39,089 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:25:39,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-09-01 03:25:39,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333149321] [2023-09-01 03:25:39,089 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:25:39,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-09-01 03:25:39,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:25:39,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-09-01 03:25:39,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-09-01 03:25:39,574 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 479 [2023-09-01 03:25:39,575 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 51 transitions, 186 flow. Second operand has 6 states, 6 states have (on average 194.0) internal successors, (1164), 6 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) [2023-09-01 03:25:39,575 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:25:39,575 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 479 [2023-09-01 03:25:39,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:25:40,726 INFO L130 PetriNetUnfolder]: 5027/6556 cut-off events. [2023-09-01 03:25:40,726 INFO L131 PetriNetUnfolder]: For 21/21 co-relation queries the response was YES. [2023-09-01 03:25:40,736 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13171 conditions, 6556 events. 5027/6556 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 510. Compared 30925 event pairs, 2560 based on Foata normal form. 0/2352 useless extension candidates. Maximal degree in co-relation 13156. Up to 3729 conditions per place. [2023-09-01 03:25:40,761 INFO L137 encePairwiseOnDemand]: 473/479 looper letters, 72 selfloop transitions, 9 changer transitions 0/84 dead transitions. [2023-09-01 03:25:40,761 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 84 transitions, 414 flow [2023-09-01 03:25:40,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-09-01 03:25:40,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-09-01 03:25:40,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1436 transitions. [2023-09-01 03:25:40,766 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4282731881896809 [2023-09-01 03:25:40,766 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1436 transitions. [2023-09-01 03:25:40,766 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1436 transitions. [2023-09-01 03:25:40,767 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:25:40,767 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1436 transitions. [2023-09-01 03:25:40,769 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 205.14285714285714) internal successors, (1436), 7 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) [2023-09-01 03:25:40,773 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 479.0) internal successors, (3832), 8 states have internal predecessors, (3832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:25:40,773 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 479.0) internal successors, (3832), 8 states have internal predecessors, (3832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:25:40,773 INFO L175 Difference]: Start difference. First operand has 57 places, 51 transitions, 186 flow. Second operand 7 states and 1436 transitions. [2023-09-01 03:25:40,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 84 transitions, 414 flow [2023-09-01 03:25:40,774 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 84 transitions, 398 flow, removed 7 selfloop flow, removed 1 redundant places. [2023-09-01 03:25:40,775 INFO L231 Difference]: Finished difference. Result has 63 places, 49 transitions, 176 flow [2023-09-01 03:25:40,775 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=176, PETRI_PLACES=63, PETRI_TRANSITIONS=49} [2023-09-01 03:25:40,776 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 2 predicate places. [2023-09-01 03:25:40,776 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 49 transitions, 176 flow [2023-09-01 03:25:40,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 194.0) internal successors, (1164), 6 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) [2023-09-01 03:25:40,777 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:25:40,777 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-09-01 03:25:40,784 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2023-09-01 03:25:40,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:25:40,984 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-09-01 03:25:40,984 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:25:40,984 INFO L85 PathProgramCache]: Analyzing trace with hash 1008859758, now seen corresponding path program 1 times [2023-09-01 03:25:40,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:25:40,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [895719972] [2023-09-01 03:25:40,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:25:40,985 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:25:40,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:25:40,986 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:25:40,989 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2023-09-01 03:25:41,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:25:41,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 12 conjunts are in the unsatisfiable core [2023-09-01 03:25:41,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:25:41,105 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2023-09-01 03:25:41,106 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 29 treesize of output 40 [2023-09-01 03:25:41,206 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 03:25:41,206 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:25:41,207 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:25:41,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [895719972] [2023-09-01 03:25:41,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [895719972] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:25:41,207 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:25:41,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 03:25:41,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498307749] [2023-09-01 03:25:41,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:25:41,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 03:25:41,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:25:41,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 03:25:41,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 03:25:41,352 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 202 out of 479 [2023-09-01 03:25:41,353 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 49 transitions, 176 flow. Second operand has 3 states, 3 states have (on average 203.66666666666666) internal successors, (611), 3 states have internal predecessors, (611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:25:41,353 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:25:41,353 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 202 of 479 [2023-09-01 03:25:41,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:25:41,983 INFO L130 PetriNetUnfolder]: 4825/6282 cut-off events. [2023-09-01 03:25:41,983 INFO L131 PetriNetUnfolder]: For 148/148 co-relation queries the response was YES. [2023-09-01 03:25:41,993 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12777 conditions, 6282 events. 4825/6282 cut-off events. For 148/148 co-relation queries the response was YES. Maximal size of possible extension queue 494. Compared 29365 event pairs, 2454 based on Foata normal form. 0/2435 useless extension candidates. Maximal degree in co-relation 12760. Up to 6210 conditions per place. [2023-09-01 03:25:42,012 INFO L137 encePairwiseOnDemand]: 476/479 looper letters, 43 selfloop transitions, 1 changer transitions 0/47 dead transitions. [2023-09-01 03:25:42,012 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 47 transitions, 260 flow [2023-09-01 03:25:42,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 03:25:42,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 03:25:42,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 646 transitions. [2023-09-01 03:25:42,015 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4495476687543493 [2023-09-01 03:25:42,016 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 646 transitions. [2023-09-01 03:25:42,016 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 646 transitions. [2023-09-01 03:25:42,016 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:25:42,016 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 646 transitions. [2023-09-01 03:25:42,017 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 215.33333333333334) internal successors, (646), 3 states have internal predecessors, (646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:25:42,019 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 479.0) internal successors, (1916), 4 states have internal predecessors, (1916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:25:42,020 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 479.0) internal successors, (1916), 4 states have internal predecessors, (1916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:25:42,020 INFO L175 Difference]: Start difference. First operand has 63 places, 49 transitions, 176 flow. Second operand 3 states and 646 transitions. [2023-09-01 03:25:42,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 47 transitions, 260 flow [2023-09-01 03:25:42,021 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 47 transitions, 234 flow, removed 3 selfloop flow, removed 6 redundant places. [2023-09-01 03:25:42,022 INFO L231 Difference]: Finished difference. Result has 57 places, 47 transitions, 148 flow [2023-09-01 03:25:42,022 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=148, PETRI_PLACES=57, PETRI_TRANSITIONS=47} [2023-09-01 03:25:42,023 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, -4 predicate places. [2023-09-01 03:25:42,023 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 47 transitions, 148 flow [2023-09-01 03:25:42,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 203.66666666666666) internal successors, (611), 3 states have internal predecessors, (611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:25:42,024 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:25:42,024 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-09-01 03:25:42,041 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2023-09-01 03:25:42,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:25:42,231 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-09-01 03:25:42,232 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:25:42,232 INFO L85 PathProgramCache]: Analyzing trace with hash 1008859757, now seen corresponding path program 1 times [2023-09-01 03:25:42,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:25:42,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [43581870] [2023-09-01 03:25:42,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:25:42,233 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:25:42,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:25:42,234 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:25:42,252 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2023-09-01 03:25:42,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:25:42,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 18 conjunts are in the unsatisfiable core [2023-09-01 03:25:42,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:25:42,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:25:42,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:25:42,457 INFO L321 Elim1Store]: treesize reduction 49, result has 38.8 percent of original size [2023-09-01 03:25:42,458 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 38 [2023-09-01 03:25:42,468 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 14 treesize of output 12 [2023-09-01 03:25:42,618 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:25:42,618 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:25:42,786 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:25:42,786 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:25:42,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [43581870] [2023-09-01 03:25:42,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [43581870] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:25:42,787 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:25:42,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-09-01 03:25:42,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172507327] [2023-09-01 03:25:42,787 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:25:42,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-09-01 03:25:42,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:25:42,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-09-01 03:25:42,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-09-01 03:25:43,773 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 479 [2023-09-01 03:25:43,774 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 47 transitions, 148 flow. Second operand has 8 states, 8 states have (on average 194.25) internal successors, (1554), 8 states have internal predecessors, (1554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:25:43,775 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:25:43,775 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 479 [2023-09-01 03:25:43,775 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:25:44,694 INFO L130 PetriNetUnfolder]: 4623/6008 cut-off events. [2023-09-01 03:25:44,695 INFO L131 PetriNetUnfolder]: For 140/140 co-relation queries the response was YES. [2023-09-01 03:25:44,701 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12216 conditions, 6008 events. 4623/6008 cut-off events. For 140/140 co-relation queries the response was YES. Maximal size of possible extension queue 478. Compared 27886 event pairs, 2348 based on Foata normal form. 0/2382 useless extension candidates. Maximal degree in co-relation 12200. Up to 3460 conditions per place. [2023-09-01 03:25:44,716 INFO L137 encePairwiseOnDemand]: 475/479 looper letters, 70 selfloop transitions, 3 changer transitions 0/76 dead transitions. [2023-09-01 03:25:44,717 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 76 transitions, 364 flow [2023-09-01 03:25:44,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 03:25:44,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 03:25:44,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1038 transitions. [2023-09-01 03:25:44,720 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4334029227557411 [2023-09-01 03:25:44,720 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1038 transitions. [2023-09-01 03:25:44,720 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1038 transitions. [2023-09-01 03:25:44,720 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:25:44,721 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1038 transitions. [2023-09-01 03:25:44,722 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 207.6) internal successors, (1038), 5 states have internal predecessors, (1038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:25:44,725 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 479.0) internal successors, (2874), 6 states have internal predecessors, (2874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:25:44,725 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 479.0) internal successors, (2874), 6 states have internal predecessors, (2874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:25:44,725 INFO L175 Difference]: Start difference. First operand has 57 places, 47 transitions, 148 flow. Second operand 5 states and 1038 transitions. [2023-09-01 03:25:44,725 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 76 transitions, 364 flow [2023-09-01 03:25:44,726 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 76 transitions, 363 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 03:25:44,727 INFO L231 Difference]: Finished difference. Result has 58 places, 45 transitions, 149 flow [2023-09-01 03:25:44,727 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=143, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=149, PETRI_PLACES=58, PETRI_TRANSITIONS=45} [2023-09-01 03:25:44,729 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, -3 predicate places. [2023-09-01 03:25:44,729 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 45 transitions, 149 flow [2023-09-01 03:25:44,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 194.25) internal successors, (1554), 8 states have internal predecessors, (1554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:25:44,729 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:25:44,730 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-09-01 03:25:44,759 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2023-09-01 03:25:44,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:25:44,937 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-09-01 03:25:44,937 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:25:44,937 INFO L85 PathProgramCache]: Analyzing trace with hash 1208759186, now seen corresponding path program 2 times [2023-09-01 03:25:44,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:25:44,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [651787601] [2023-09-01 03:25:44,938 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 03:25:44,938 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:25:44,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:25:44,942 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:25:44,943 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2023-09-01 03:25:45,046 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-09-01 03:25:45,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 03:25:45,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 20 conjunts are in the unsatisfiable core [2023-09-01 03:25:45,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:25:45,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:25:45,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:25:45,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:25:45,131 INFO L321 Elim1Store]: treesize reduction 36, result has 43.8 percent of original size [2023-09-01 03:25:45,131 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 35 [2023-09-01 03:25:45,148 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-09-01 03:25:45,148 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2023-09-01 03:25:45,257 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-09-01 03:25:45,258 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:25:45,258 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:25:45,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [651787601] [2023-09-01 03:25:45,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [651787601] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:25:45,258 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:25:45,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 03:25:45,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459010986] [2023-09-01 03:25:45,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:25:45,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 03:25:45,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:25:45,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 03:25:45,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 03:25:47,332 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-09-01 03:25:49,375 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-09-01 03:25:49,485 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 201 out of 479 [2023-09-01 03:25:49,486 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 45 transitions, 149 flow. Second operand has 3 states, 3 states have (on average 202.0) internal successors, (606), 3 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) [2023-09-01 03:25:49,486 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:25:49,486 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 201 of 479 [2023-09-01 03:25:49,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:25:50,157 INFO L130 PetriNetUnfolder]: 4623/6007 cut-off events. [2023-09-01 03:25:50,158 INFO L131 PetriNetUnfolder]: For 140/140 co-relation queries the response was YES. [2023-09-01 03:25:50,167 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12215 conditions, 6007 events. 4623/6007 cut-off events. For 140/140 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 27882 event pairs, 2348 based on Foata normal form. 0/2375 useless extension candidates. Maximal degree in co-relation 12198. Up to 5935 conditions per place. [2023-09-01 03:25:50,186 INFO L137 encePairwiseOnDemand]: 477/479 looper letters, 40 selfloop transitions, 1 changer transitions 0/44 dead transitions. [2023-09-01 03:25:50,193 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 44 transitions, 225 flow [2023-09-01 03:25:50,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 03:25:50,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 03:25:50,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 639 transitions. [2023-09-01 03:25:50,195 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44467640918580376 [2023-09-01 03:25:50,195 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 639 transitions. [2023-09-01 03:25:50,195 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 639 transitions. [2023-09-01 03:25:50,196 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:25:50,196 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 639 transitions. [2023-09-01 03:25:50,197 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 213.0) internal successors, (639), 3 states have internal predecessors, (639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:25:50,198 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 479.0) internal successors, (1916), 4 states have internal predecessors, (1916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:25:50,199 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 479.0) internal successors, (1916), 4 states have internal predecessors, (1916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:25:50,199 INFO L175 Difference]: Start difference. First operand has 58 places, 45 transitions, 149 flow. Second operand 3 states and 639 transitions. [2023-09-01 03:25:50,199 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 44 transitions, 225 flow [2023-09-01 03:25:50,200 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 44 transitions, 220 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-09-01 03:25:50,200 INFO L231 Difference]: Finished difference. Result has 55 places, 44 transitions, 140 flow [2023-09-01 03:25:50,200 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=140, PETRI_PLACES=55, PETRI_TRANSITIONS=44} [2023-09-01 03:25:50,201 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, -6 predicate places. [2023-09-01 03:25:50,201 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 44 transitions, 140 flow [2023-09-01 03:25:50,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 202.0) internal successors, (606), 3 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) [2023-09-01 03:25:50,201 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:25:50,202 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-09-01 03:25:50,209 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 (10)] Ended with exit code 0 [2023-09-01 03:25:50,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:25:50,409 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-09-01 03:25:50,410 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:25:50,410 INFO L85 PathProgramCache]: Analyzing trace with hash 1208759094, now seen corresponding path program 2 times [2023-09-01 03:25:50,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:25:50,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [700577718] [2023-09-01 03:25:50,410 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 03:25:50,410 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:25:50,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:25:50,411 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:25:50,414 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2023-09-01 03:25:50,526 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 03:25:50,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 03:25:50,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 13 conjunts are in the unsatisfiable core [2023-09-01 03:25:50,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:25:50,621 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-09-01 03:25:50,621 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-09-01 03:25:50,762 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:25:50,762 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:25:51,240 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:25:51,240 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:25:51,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [700577718] [2023-09-01 03:25:51,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [700577718] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:25:51,240 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:25:51,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-09-01 03:25:51,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378353333] [2023-09-01 03:25:51,241 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:25:51,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 03:25:51,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:25:51,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 03:25:51,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-09-01 03:25:55,332 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 198 out of 479 [2023-09-01 03:25:55,334 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 44 transitions, 140 flow. Second operand has 12 states, 12 states have (on average 199.0) internal successors, (2388), 12 states have internal predecessors, (2388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:25:55,334 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:25:55,334 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 198 of 479 [2023-09-01 03:25:55,334 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:26:01,185 INFO L130 PetriNetUnfolder]: 23585/30428 cut-off events. [2023-09-01 03:26:01,185 INFO L131 PetriNetUnfolder]: For 1022/1022 co-relation queries the response was YES. [2023-09-01 03:26:01,292 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62179 conditions, 30428 events. 23585/30428 cut-off events. For 1022/1022 co-relation queries the response was YES. Maximal size of possible extension queue 1617. Compared 165553 event pairs, 12015 based on Foata normal form. 6/12130 useless extension candidates. Maximal degree in co-relation 62162. Up to 3454 conditions per place. [2023-09-01 03:26:01,387 INFO L137 encePairwiseOnDemand]: 475/479 looper letters, 289 selfloop transitions, 12 changer transitions 0/304 dead transitions. [2023-09-01 03:26:01,387 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 304 transitions, 1378 flow [2023-09-01 03:26:01,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-09-01 03:26:01,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-09-01 03:26:01,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2683 transitions. [2023-09-01 03:26:01,398 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46677105080027836 [2023-09-01 03:26:01,398 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2683 transitions. [2023-09-01 03:26:01,398 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2683 transitions. [2023-09-01 03:26:01,400 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:26:01,400 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2683 transitions. [2023-09-01 03:26:01,405 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 223.58333333333334) internal successors, (2683), 12 states have internal predecessors, (2683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:26:01,412 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 479.0) internal successors, (6227), 13 states have internal predecessors, (6227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:26:01,415 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 479.0) internal successors, (6227), 13 states have internal predecessors, (6227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:26:01,416 INFO L175 Difference]: Start difference. First operand has 55 places, 44 transitions, 140 flow. Second operand 12 states and 2683 transitions. [2023-09-01 03:26:01,417 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 304 transitions, 1378 flow [2023-09-01 03:26:01,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 304 transitions, 1377 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 03:26:01,422 INFO L231 Difference]: Finished difference. Result has 72 places, 51 transitions, 237 flow [2023-09-01 03:26:01,422 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=139, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=237, PETRI_PLACES=72, PETRI_TRANSITIONS=51} [2023-09-01 03:26:01,423 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 11 predicate places. [2023-09-01 03:26:01,423 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 51 transitions, 237 flow [2023-09-01 03:26:01,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 199.0) internal successors, (2388), 12 states have internal predecessors, (2388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:26:01,430 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:26:01,430 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-09-01 03:26:01,437 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 (11)] Ended with exit code 0 [2023-09-01 03:26:01,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:26:01,637 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-09-01 03:26:01,638 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:26:01,642 INFO L85 PathProgramCache]: Analyzing trace with hash 1209873206, now seen corresponding path program 1 times [2023-09-01 03:26:01,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:26:01,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [847681769] [2023-09-01 03:26:01,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:26:01,643 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:26:01,643 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:26:01,644 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:26:01,646 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2023-09-01 03:26:01,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:26:01,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 5 conjunts are in the unsatisfiable core [2023-09-01 03:26:01,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:26:01,767 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-09-01 03:26:01,768 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2023-09-01 03:26:01,785 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 03:26:01,785 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:26:01,785 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:26:01,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [847681769] [2023-09-01 03:26:01,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [847681769] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:26:01,785 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:26:01,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 03:26:01,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178919727] [2023-09-01 03:26:01,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:26:01,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 03:26:01,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:26:01,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 03:26:01,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 03:26:01,939 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 479 [2023-09-01 03:26:01,940 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 51 transitions, 237 flow. Second operand has 4 states, 4 states have (on average 192.25) internal successors, (769), 4 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) [2023-09-01 03:26:01,940 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:26:01,940 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 479 [2023-09-01 03:26:01,940 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:26:03,558 INFO L130 PetriNetUnfolder]: 12822/16955 cut-off events. [2023-09-01 03:26:03,559 INFO L131 PetriNetUnfolder]: For 556/556 co-relation queries the response was YES. [2023-09-01 03:26:03,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34703 conditions, 16955 events. 12822/16955 cut-off events. For 556/556 co-relation queries the response was YES. Maximal size of possible extension queue 864. Compared 90866 event pairs, 6580 based on Foata normal form. 0/8089 useless extension candidates. Maximal degree in co-relation 34678. Up to 16717 conditions per place. [2023-09-01 03:26:03,705 INFO L137 encePairwiseOnDemand]: 474/479 looper letters, 40 selfloop transitions, 5 changer transitions 0/48 dead transitions. [2023-09-01 03:26:03,705 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 48 transitions, 321 flow [2023-09-01 03:26:03,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 03:26:03,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 03:26:03,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 799 transitions. [2023-09-01 03:26:03,709 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41701461377870563 [2023-09-01 03:26:03,709 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 799 transitions. [2023-09-01 03:26:03,709 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 799 transitions. [2023-09-01 03:26:03,710 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:26:03,710 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 799 transitions. [2023-09-01 03:26:03,711 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 199.75) internal successors, (799), 4 states have internal predecessors, (799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:26:03,713 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 479.0) internal successors, (2395), 5 states have internal predecessors, (2395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:26:03,713 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 479.0) internal successors, (2395), 5 states have internal predecessors, (2395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:26:03,713 INFO L175 Difference]: Start difference. First operand has 72 places, 51 transitions, 237 flow. Second operand 4 states and 799 transitions. [2023-09-01 03:26:03,713 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 48 transitions, 321 flow [2023-09-01 03:26:03,716 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 48 transitions, 296 flow, removed 7 selfloop flow, removed 4 redundant places. [2023-09-01 03:26:03,716 INFO L231 Difference]: Finished difference. Result has 68 places, 48 transitions, 216 flow [2023-09-01 03:26:03,717 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=216, PETRI_PLACES=68, PETRI_TRANSITIONS=48} [2023-09-01 03:26:03,717 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 7 predicate places. [2023-09-01 03:26:03,717 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 48 transitions, 216 flow [2023-09-01 03:26:03,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 192.25) internal successors, (769), 4 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) [2023-09-01 03:26:03,717 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:26:03,718 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-09-01 03:26:03,727 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 (12)] Ended with exit code 0 [2023-09-01 03:26:03,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:26:03,937 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-09-01 03:26:03,937 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:26:03,937 INFO L85 PathProgramCache]: Analyzing trace with hash 1209873207, now seen corresponding path program 1 times [2023-09-01 03:26:03,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:26:03,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [883635219] [2023-09-01 03:26:03,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:26:03,937 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:26:03,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:26:03,938 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:26:04,008 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2023-09-01 03:26:04,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:26:04,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 9 conjunts are in the unsatisfiable core [2023-09-01 03:26:04,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:26:04,159 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:26:04,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:26:04,297 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2023-09-01 03:26:04,352 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:26:04,352 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:26:04,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [883635219] [2023-09-01 03:26:04,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [883635219] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:26:04,352 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:26:04,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-09-01 03:26:04,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39089798] [2023-09-01 03:26:04,353 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:26:04,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-09-01 03:26:04,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:26:04,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-09-01 03:26:04,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-09-01 03:26:06,127 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 479 [2023-09-01 03:26:06,128 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 48 transitions, 216 flow. Second operand has 10 states, 10 states have (on average 193.2) internal successors, (1932), 10 states have internal predecessors, (1932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:26:06,128 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:26:06,128 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 479 [2023-09-01 03:26:06,128 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:26:09,803 INFO L130 PetriNetUnfolder]: 19941/26750 cut-off events. [2023-09-01 03:26:09,804 INFO L131 PetriNetUnfolder]: For 1243/1243 co-relation queries the response was YES. [2023-09-01 03:26:09,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55023 conditions, 26750 events. 19941/26750 cut-off events. For 1243/1243 co-relation queries the response was YES. Maximal size of possible extension queue 1257. Compared 153271 event pairs, 5250 based on Foata normal form. 0/14026 useless extension candidates. Maximal degree in co-relation 54997. Up to 11729 conditions per place. [2023-09-01 03:26:10,007 INFO L137 encePairwiseOnDemand]: 472/479 looper letters, 139 selfloop transitions, 16 changer transitions 0/157 dead transitions. [2023-09-01 03:26:10,007 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 157 transitions, 776 flow [2023-09-01 03:26:10,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-09-01 03:26:10,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-09-01 03:26:10,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2258 transitions. [2023-09-01 03:26:10,015 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4285443158094515 [2023-09-01 03:26:10,015 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2258 transitions. [2023-09-01 03:26:10,015 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2258 transitions. [2023-09-01 03:26:10,016 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:26:10,016 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2258 transitions. [2023-09-01 03:26:10,019 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 205.27272727272728) internal successors, (2258), 11 states have internal predecessors, (2258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:26:10,024 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 479.0) internal successors, (5748), 12 states have internal predecessors, (5748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:26:10,025 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 479.0) internal successors, (5748), 12 states have internal predecessors, (5748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:26:10,025 INFO L175 Difference]: Start difference. First operand has 68 places, 48 transitions, 216 flow. Second operand 11 states and 2258 transitions. [2023-09-01 03:26:10,025 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 157 transitions, 776 flow [2023-09-01 03:26:10,032 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 157 transitions, 769 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 03:26:10,033 INFO L231 Difference]: Finished difference. Result has 80 places, 55 transitions, 288 flow [2023-09-01 03:26:10,034 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=288, PETRI_PLACES=80, PETRI_TRANSITIONS=55} [2023-09-01 03:26:10,035 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 19 predicate places. [2023-09-01 03:26:10,035 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 55 transitions, 288 flow [2023-09-01 03:26:10,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 193.2) internal successors, (1932), 10 states have internal predecessors, (1932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:26:10,035 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:26:10,036 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:26:10,053 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 [2023-09-01 03:26:10,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:26:10,244 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-09-01 03:26:10,244 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:26:10,244 INFO L85 PathProgramCache]: Analyzing trace with hash -1148355339, now seen corresponding path program 1 times [2023-09-01 03:26:10,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:26:10,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [45185453] [2023-09-01 03:26:10,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:26:10,247 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:26:10,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:26:10,248 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:26:10,250 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2023-09-01 03:26:10,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:26:10,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 12 conjunts are in the unsatisfiable core [2023-09-01 03:26:10,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:26:10,483 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-09-01 03:26:10,484 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-09-01 03:26:10,660 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:26:10,660 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:26:10,947 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:26:10,947 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:26:10,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [45185453] [2023-09-01 03:26:10,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [45185453] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:26:10,947 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:26:10,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-09-01 03:26:10,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572264820] [2023-09-01 03:26:10,948 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:26:10,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-09-01 03:26:10,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:26:10,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-09-01 03:26:10,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-09-01 03:26:12,483 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 479 [2023-09-01 03:26:12,484 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 55 transitions, 288 flow. Second operand has 8 states, 8 states have (on average 194.75) internal successors, (1558), 8 states have internal predecessors, (1558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:26:12,484 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:26:12,484 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 479 [2023-09-01 03:26:12,484 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:26:14,960 INFO L130 PetriNetUnfolder]: 16134/21847 cut-off events. [2023-09-01 03:26:14,960 INFO L131 PetriNetUnfolder]: For 9002/10240 co-relation queries the response was YES. [2023-09-01 03:26:15,000 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50512 conditions, 21847 events. 16134/21847 cut-off events. For 9002/10240 co-relation queries the response was YES. Maximal size of possible extension queue 1076. Compared 126621 event pairs, 9438 based on Foata normal form. 1238/14581 useless extension candidates. Maximal degree in co-relation 50482. Up to 19748 conditions per place. [2023-09-01 03:26:15,059 INFO L137 encePairwiseOnDemand]: 475/479 looper letters, 70 selfloop transitions, 3 changer transitions 0/77 dead transitions. [2023-09-01 03:26:15,060 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 77 transitions, 492 flow [2023-09-01 03:26:15,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 03:26:15,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 03:26:15,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1027 transitions. [2023-09-01 03:26:15,070 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42881002087682674 [2023-09-01 03:26:15,070 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1027 transitions. [2023-09-01 03:26:15,070 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1027 transitions. [2023-09-01 03:26:15,070 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:26:15,070 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1027 transitions. [2023-09-01 03:26:15,072 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 205.4) internal successors, (1027), 5 states have internal predecessors, (1027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:26:15,074 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 479.0) internal successors, (2874), 6 states have internal predecessors, (2874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:26:15,074 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 479.0) internal successors, (2874), 6 states have internal predecessors, (2874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:26:15,075 INFO L175 Difference]: Start difference. First operand has 80 places, 55 transitions, 288 flow. Second operand 5 states and 1027 transitions. [2023-09-01 03:26:15,075 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 77 transitions, 492 flow [2023-09-01 03:26:15,081 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 77 transitions, 475 flow, removed 5 selfloop flow, removed 4 redundant places. [2023-09-01 03:26:15,082 INFO L231 Difference]: Finished difference. Result has 78 places, 53 transitions, 273 flow [2023-09-01 03:26:15,082 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=267, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=273, PETRI_PLACES=78, PETRI_TRANSITIONS=53} [2023-09-01 03:26:15,083 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 17 predicate places. [2023-09-01 03:26:15,083 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 53 transitions, 273 flow [2023-09-01 03:26:15,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 194.75) internal successors, (1558), 8 states have internal predecessors, (1558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:26:15,083 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:26:15,084 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:26:15,107 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 (14)] Ended with exit code 0 [2023-09-01 03:26:15,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:26:15,292 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-09-01 03:26:15,293 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:26:15,293 INFO L85 PathProgramCache]: Analyzing trace with hash -1148355340, now seen corresponding path program 1 times [2023-09-01 03:26:15,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:26:15,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1438984858] [2023-09-01 03:26:15,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:26:15,294 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:26:15,294 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:26:15,295 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:26:15,298 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2023-09-01 03:26:15,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:26:15,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 4 conjunts are in the unsatisfiable core [2023-09-01 03:26:15,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:26:15,493 INFO L321 Elim1Store]: treesize reduction 88, result has 30.7 percent of original size [2023-09-01 03:26:15,494 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 46 [2023-09-01 03:26:15,515 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 03:26:15,515 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:26:15,516 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:26:15,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1438984858] [2023-09-01 03:26:15,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1438984858] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:26:15,516 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:26:15,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 03:26:15,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693475478] [2023-09-01 03:26:15,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:26:15,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 03:26:15,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:26:15,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 03:26:15,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 03:26:15,605 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 199 out of 479 [2023-09-01 03:26:15,606 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 53 transitions, 273 flow. Second operand has 3 states, 3 states have (on average 201.33333333333334) internal successors, (604), 3 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:26:15,606 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:26:15,606 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 199 of 479 [2023-09-01 03:26:15,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:26:17,708 INFO L130 PetriNetUnfolder]: 15489/20815 cut-off events. [2023-09-01 03:26:17,709 INFO L131 PetriNetUnfolder]: For 8201/9333 co-relation queries the response was YES. [2023-09-01 03:26:17,807 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48133 conditions, 20815 events. 15489/20815 cut-off events. For 8201/9333 co-relation queries the response was YES. Maximal size of possible extension queue 1067. Compared 118758 event pairs, 8985 based on Foata normal form. 1132/13951 useless extension candidates. Maximal degree in co-relation 48104. Up to 20559 conditions per place. [2023-09-01 03:26:17,897 INFO L137 encePairwiseOnDemand]: 476/479 looper letters, 46 selfloop transitions, 1 changer transitions 0/51 dead transitions. [2023-09-01 03:26:17,897 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 51 transitions, 363 flow [2023-09-01 03:26:17,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 03:26:17,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 03:26:17,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 627 transitions. [2023-09-01 03:26:17,900 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4363256784968685 [2023-09-01 03:26:17,900 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 627 transitions. [2023-09-01 03:26:17,900 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 627 transitions. [2023-09-01 03:26:17,901 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:26:17,901 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 627 transitions. [2023-09-01 03:26:17,902 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 209.0) internal successors, (627), 3 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:26:17,904 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 479.0) internal successors, (1916), 4 states have internal predecessors, (1916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:26:17,904 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 479.0) internal successors, (1916), 4 states have internal predecessors, (1916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:26:17,904 INFO L175 Difference]: Start difference. First operand has 78 places, 53 transitions, 273 flow. Second operand 3 states and 627 transitions. [2023-09-01 03:26:17,904 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 51 transitions, 363 flow [2023-09-01 03:26:17,916 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 51 transitions, 358 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-09-01 03:26:17,918 INFO L231 Difference]: Finished difference. Result has 75 places, 51 transitions, 266 flow [2023-09-01 03:26:17,918 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=264, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=266, PETRI_PLACES=75, PETRI_TRANSITIONS=51} [2023-09-01 03:26:17,919 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 14 predicate places. [2023-09-01 03:26:17,919 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 51 transitions, 266 flow [2023-09-01 03:26:17,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 201.33333333333334) internal successors, (604), 3 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:26:17,919 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:26:17,920 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:26:17,933 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 [2023-09-01 03:26:18,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:26:18,131 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-09-01 03:26:18,132 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:26:18,132 INFO L85 PathProgramCache]: Analyzing trace with hash -1247812592, now seen corresponding path program 1 times [2023-09-01 03:26:18,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:26:18,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [94377733] [2023-09-01 03:26:18,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:26:18,145 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:26:18,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:26:18,147 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:26:18,184 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2023-09-01 03:26:18,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:26:18,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2023-09-01 03:26:18,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:26:18,348 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:26:18,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:26:18,395 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 03:26:18,396 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 105 treesize of output 70 [2023-09-01 03:26:18,401 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 70 treesize of output 68 [2023-09-01 03:26:18,405 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 68 treesize of output 66 [2023-09-01 03:26:18,504 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:26:18,504 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:26:18,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [94377733] [2023-09-01 03:26:18,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [94377733] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:26:18,504 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:26:18,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-09-01 03:26:18,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091289165] [2023-09-01 03:26:18,504 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:26:18,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 03:26:18,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:26:18,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 03:26:18,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-09-01 03:26:19,041 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 197 out of 479 [2023-09-01 03:26:19,042 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 51 transitions, 266 flow. Second operand has 12 states, 12 states have (on average 198.33333333333334) internal successors, (2380), 12 states have internal predecessors, (2380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:26:19,042 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:26:19,042 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 197 of 479 [2023-09-01 03:26:19,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:26:22,334 INFO L130 PetriNetUnfolder]: 17345/23084 cut-off events. [2023-09-01 03:26:22,334 INFO L131 PetriNetUnfolder]: For 9206/9206 co-relation queries the response was YES. [2023-09-01 03:26:22,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53981 conditions, 23084 events. 17345/23084 cut-off events. For 9206/9206 co-relation queries the response was YES. Maximal size of possible extension queue 1167. Compared 131129 event pairs, 6336 based on Foata normal form. 156/14347 useless extension candidates. Maximal degree in co-relation 53952. Up to 13985 conditions per place. [2023-09-01 03:26:22,533 INFO L137 encePairwiseOnDemand]: 470/479 looper letters, 93 selfloop transitions, 12 changer transitions 0/107 dead transitions. [2023-09-01 03:26:22,533 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 107 transitions, 600 flow [2023-09-01 03:26:22,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-09-01 03:26:22,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-09-01 03:26:22,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2065 transitions. [2023-09-01 03:26:22,545 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4311064718162839 [2023-09-01 03:26:22,545 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2065 transitions. [2023-09-01 03:26:22,545 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2065 transitions. [2023-09-01 03:26:22,546 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:26:22,546 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2065 transitions. [2023-09-01 03:26:22,549 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 206.5) internal successors, (2065), 10 states have internal predecessors, (2065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:26:22,552 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 479.0) internal successors, (5269), 11 states have internal predecessors, (5269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:26:22,552 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 479.0) internal successors, (5269), 11 states have internal predecessors, (5269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:26:22,552 INFO L175 Difference]: Start difference. First operand has 75 places, 51 transitions, 266 flow. Second operand 10 states and 2065 transitions. [2023-09-01 03:26:22,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 107 transitions, 600 flow [2023-09-01 03:26:22,571 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 107 transitions, 599 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 03:26:22,572 INFO L231 Difference]: Finished difference. Result has 85 places, 50 transitions, 295 flow [2023-09-01 03:26:22,572 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=255, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=295, PETRI_PLACES=85, PETRI_TRANSITIONS=50} [2023-09-01 03:26:22,572 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 24 predicate places. [2023-09-01 03:26:22,573 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 50 transitions, 295 flow [2023-09-01 03:26:22,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 198.33333333333334) internal successors, (2380), 12 states have internal predecessors, (2380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:26:22,573 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:26:22,573 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:26:22,581 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 (16)] Ended with exit code 0 [2023-09-01 03:26:22,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:26:22,783 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-09-01 03:26:22,783 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:26:22,783 INFO L85 PathProgramCache]: Analyzing trace with hash -1239284402, now seen corresponding path program 1 times [2023-09-01 03:26:22,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:26:22,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1562709119] [2023-09-01 03:26:22,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:26:22,784 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:26:22,784 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:26:22,785 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:26:22,787 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2023-09-01 03:26:22,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:26:22,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 9 conjunts are in the unsatisfiable core [2023-09-01 03:26:22,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:26:22,929 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:26:22,929 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:26:23,141 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2023-09-01 03:26:23,201 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:26:23,201 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:26:23,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1562709119] [2023-09-01 03:26:23,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1562709119] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:26:23,201 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:26:23,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-09-01 03:26:23,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368247485] [2023-09-01 03:26:23,202 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:26:23,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-09-01 03:26:23,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:26:23,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-09-01 03:26:23,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-09-01 03:26:24,850 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 479 [2023-09-01 03:26:24,851 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 50 transitions, 295 flow. Second operand has 10 states, 10 states have (on average 193.6) internal successors, (1936), 10 states have internal predecessors, (1936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:26:24,851 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:26:24,851 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 479 [2023-09-01 03:26:24,851 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:26:29,225 INFO L130 PetriNetUnfolder]: 22267/30437 cut-off events. [2023-09-01 03:26:29,226 INFO L131 PetriNetUnfolder]: For 19925/21843 co-relation queries the response was YES. [2023-09-01 03:26:29,428 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76375 conditions, 30437 events. 22267/30437 cut-off events. For 19925/21843 co-relation queries the response was YES. Maximal size of possible extension queue 1479. Compared 186799 event pairs, 6361 based on Foata normal form. 1918/22731 useless extension candidates. Maximal degree in co-relation 76342. Up to 14353 conditions per place. [2023-09-01 03:26:29,556 INFO L137 encePairwiseOnDemand]: 472/479 looper letters, 118 selfloop transitions, 16 changer transitions 0/137 dead transitions. [2023-09-01 03:26:29,557 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 137 transitions, 841 flow [2023-09-01 03:26:29,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-09-01 03:26:29,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-09-01 03:26:29,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2231 transitions. [2023-09-01 03:26:29,563 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4234200037957867 [2023-09-01 03:26:29,564 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2231 transitions. [2023-09-01 03:26:29,564 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2231 transitions. [2023-09-01 03:26:29,565 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:26:29,565 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2231 transitions. [2023-09-01 03:26:29,569 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 202.8181818181818) internal successors, (2231), 11 states have internal predecessors, (2231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:26:29,574 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 479.0) internal successors, (5748), 12 states have internal predecessors, (5748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:26:29,575 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 479.0) internal successors, (5748), 12 states have internal predecessors, (5748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:26:29,575 INFO L175 Difference]: Start difference. First operand has 85 places, 50 transitions, 295 flow. Second operand 11 states and 2231 transitions. [2023-09-01 03:26:29,575 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 137 transitions, 841 flow [2023-09-01 03:26:29,615 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 137 transitions, 827 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-09-01 03:26:29,617 INFO L231 Difference]: Finished difference. Result has 95 places, 56 transitions, 354 flow [2023-09-01 03:26:29,617 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=285, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=354, PETRI_PLACES=95, PETRI_TRANSITIONS=56} [2023-09-01 03:26:29,618 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 34 predicate places. [2023-09-01 03:26:29,618 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 56 transitions, 354 flow [2023-09-01 03:26:29,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 193.6) internal successors, (1936), 10 states have internal predecessors, (1936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:26:29,619 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:26:29,619 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:26:29,629 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2023-09-01 03:26:29,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:26:29,829 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-09-01 03:26:29,829 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:26:29,829 INFO L85 PathProgramCache]: Analyzing trace with hash -2085426515, now seen corresponding path program 2 times [2023-09-01 03:26:29,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:26:29,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1612766136] [2023-09-01 03:26:29,829 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 03:26:29,830 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:26:29,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:26:29,831 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:26:29,833 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2023-09-01 03:26:29,927 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 03:26:29,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 03:26:29,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 12 conjunts are in the unsatisfiable core [2023-09-01 03:26:29,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:26:30,002 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2023-09-01 03:26:30,003 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 42 [2023-09-01 03:26:30,091 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:26:30,091 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:26:30,179 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 03:26:30,180 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 105 treesize of output 70 [2023-09-01 03:26:30,188 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 70 treesize of output 68 [2023-09-01 03:26:30,610 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:26:30,610 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:26:30,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1612766136] [2023-09-01 03:26:30,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1612766136] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:26:30,611 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:26:30,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2023-09-01 03:26:30,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440743393] [2023-09-01 03:26:30,611 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:26:30,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-09-01 03:26:30,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:26:30,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-09-01 03:26:30,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2023-09-01 03:26:33,968 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 479 [2023-09-01 03:26:33,970 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 56 transitions, 354 flow. Second operand has 14 states, 14 states have (on average 192.28571428571428) internal successors, (2692), 14 states have internal predecessors, (2692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:26:33,970 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:26:33,970 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 479 [2023-09-01 03:26:33,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:26:40,507 INFO L130 PetriNetUnfolder]: 30684/41784 cut-off events. [2023-09-01 03:26:40,507 INFO L131 PetriNetUnfolder]: For 32429/35297 co-relation queries the response was YES. [2023-09-01 03:26:40,821 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117301 conditions, 41784 events. 30684/41784 cut-off events. For 32429/35297 co-relation queries the response was YES. Maximal size of possible extension queue 1979. Compared 269916 event pairs, 7446 based on Foata normal form. 3668/36096 useless extension candidates. Maximal degree in co-relation 117263. Up to 14273 conditions per place. [2023-09-01 03:26:40,967 INFO L137 encePairwiseOnDemand]: 472/479 looper letters, 133 selfloop transitions, 14 changer transitions 0/150 dead transitions. [2023-09-01 03:26:40,967 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 150 transitions, 958 flow [2023-09-01 03:26:40,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-09-01 03:26:40,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-09-01 03:26:40,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2035 transitions. [2023-09-01 03:26:40,971 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42484342379958245 [2023-09-01 03:26:40,971 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2035 transitions. [2023-09-01 03:26:40,972 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2035 transitions. [2023-09-01 03:26:40,972 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:26:40,972 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2035 transitions. [2023-09-01 03:26:40,974 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 203.5) internal successors, (2035), 10 states have internal predecessors, (2035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:26:40,977 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 479.0) internal successors, (5269), 11 states have internal predecessors, (5269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:26:40,978 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 479.0) internal successors, (5269), 11 states have internal predecessors, (5269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:26:40,978 INFO L175 Difference]: Start difference. First operand has 95 places, 56 transitions, 354 flow. Second operand 10 states and 2035 transitions. [2023-09-01 03:26:40,978 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 150 transitions, 958 flow [2023-09-01 03:26:41,309 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 150 transitions, 947 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-09-01 03:26:41,310 INFO L231 Difference]: Finished difference. Result has 103 places, 59 transitions, 407 flow [2023-09-01 03:26:41,310 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=343, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=407, PETRI_PLACES=103, PETRI_TRANSITIONS=59} [2023-09-01 03:26:41,311 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 42 predicate places. [2023-09-01 03:26:41,311 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 59 transitions, 407 flow [2023-09-01 03:26:41,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 192.28571428571428) internal successors, (2692), 14 states have internal predecessors, (2692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:26:41,312 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:26:41,312 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:26:41,323 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2023-09-01 03:26:41,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:26:41,523 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-09-01 03:26:41,523 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:26:41,523 INFO L85 PathProgramCache]: Analyzing trace with hash -1246211919, now seen corresponding path program 1 times [2023-09-01 03:26:41,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:26:41,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1012013910] [2023-09-01 03:26:41,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:26:41,524 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:26:41,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:26:41,525 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:26:41,528 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2023-09-01 03:26:41,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:26:41,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 14 conjunts are in the unsatisfiable core [2023-09-01 03:26:41,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:26:41,723 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:26:41,723 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:26:41,823 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:26:41,824 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:26:41,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1012013910] [2023-09-01 03:26:41,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1012013910] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:26:41,824 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:26:41,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2023-09-01 03:26:41,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272816750] [2023-09-01 03:26:41,824 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:26:41,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-09-01 03:26:41,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:26:41,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-09-01 03:26:41,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2023-09-01 03:26:42,549 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 195 out of 479 [2023-09-01 03:26:42,550 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 59 transitions, 407 flow. Second operand has 11 states, 11 states have (on average 196.63636363636363) internal successors, (2163), 11 states have internal predecessors, (2163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:26:42,551 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:26:42,551 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 195 of 479 [2023-09-01 03:26:42,551 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:26:48,692 INFO L130 PetriNetUnfolder]: 31024/42352 cut-off events. [2023-09-01 03:26:48,692 INFO L131 PetriNetUnfolder]: For 59240/61916 co-relation queries the response was YES. [2023-09-01 03:26:49,064 INFO L83 FinitePrefix]: Finished finitePrefix Result has 127750 conditions, 42352 events. 31024/42352 cut-off events. For 59240/61916 co-relation queries the response was YES. Maximal size of possible extension queue 2054. Compared 272850 event pairs, 15624 based on Foata normal form. 2724/35556 useless extension candidates. Maximal degree in co-relation 127709. Up to 30409 conditions per place. [2023-09-01 03:26:49,232 INFO L137 encePairwiseOnDemand]: 472/479 looper letters, 86 selfloop transitions, 11 changer transitions 0/100 dead transitions. [2023-09-01 03:26:49,232 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 100 transitions, 753 flow [2023-09-01 03:26:49,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-09-01 03:26:49,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-09-01 03:26:49,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1832 transitions. [2023-09-01 03:26:49,236 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4249594061702621 [2023-09-01 03:26:49,236 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1832 transitions. [2023-09-01 03:26:49,237 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1832 transitions. [2023-09-01 03:26:49,237 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:26:49,237 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1832 transitions. [2023-09-01 03:26:49,239 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 203.55555555555554) internal successors, (1832), 9 states have internal predecessors, (1832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:26:49,243 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 479.0) internal successors, (4790), 10 states have internal predecessors, (4790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:26:49,244 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 479.0) internal successors, (4790), 10 states have internal predecessors, (4790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:26:49,244 INFO L175 Difference]: Start difference. First operand has 103 places, 59 transitions, 407 flow. Second operand 9 states and 1832 transitions. [2023-09-01 03:26:49,244 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 100 transitions, 753 flow [2023-09-01 03:26:49,326 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 100 transitions, 727 flow, removed 5 selfloop flow, removed 6 redundant places. [2023-09-01 03:26:49,327 INFO L231 Difference]: Finished difference. Result has 106 places, 57 transitions, 405 flow [2023-09-01 03:26:49,327 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=371, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=405, PETRI_PLACES=106, PETRI_TRANSITIONS=57} [2023-09-01 03:26:49,328 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 45 predicate places. [2023-09-01 03:26:49,328 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 57 transitions, 405 flow [2023-09-01 03:26:49,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 196.63636363636363) internal successors, (2163), 11 states have internal predecessors, (2163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:26:49,328 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:26:49,328 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:26:49,337 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2023-09-01 03:26:49,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:26:49,537 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-09-01 03:26:49,538 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:26:49,538 INFO L85 PathProgramCache]: Analyzing trace with hash 40912464, now seen corresponding path program 1 times [2023-09-01 03:26:49,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:26:49,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [361319472] [2023-09-01 03:26:49,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:26:49,539 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:26:49,539 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:26:49,540 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:26:49,544 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2023-09-01 03:26:49,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:26:49,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 3 conjunts are in the unsatisfiable core [2023-09-01 03:26:49,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:26:49,672 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 03:26:49,673 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:26:49,673 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:26:49,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [361319472] [2023-09-01 03:26:49,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [361319472] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:26:49,673 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:26:49,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 03:26:49,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57384844] [2023-09-01 03:26:49,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:26:49,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 03:26:49,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:26:49,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 03:26:49,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-09-01 03:26:49,813 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 201 out of 479 [2023-09-01 03:26:49,814 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 57 transitions, 405 flow. Second operand has 4 states, 4 states have (on average 203.25) internal successors, (813), 4 states have internal predecessors, (813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:26:49,814 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:26:49,814 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 201 of 479 [2023-09-01 03:26:49,814 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:26:53,452 INFO L130 PetriNetUnfolder]: 19367/27121 cut-off events. [2023-09-01 03:26:53,452 INFO L131 PetriNetUnfolder]: For 31416/34952 co-relation queries the response was YES. [2023-09-01 03:26:53,672 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83120 conditions, 27121 events. 19367/27121 cut-off events. For 31416/34952 co-relation queries the response was YES. Maximal size of possible extension queue 1424. Compared 176540 event pairs, 13331 based on Foata normal form. 5656/26648 useless extension candidates. Maximal degree in co-relation 83078. Up to 26958 conditions per place. [2023-09-01 03:26:53,768 INFO L137 encePairwiseOnDemand]: 477/479 looper letters, 50 selfloop transitions, 1 changer transitions 0/56 dead transitions. [2023-09-01 03:26:53,768 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 56 transitions, 503 flow [2023-09-01 03:26:53,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 03:26:53,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 03:26:53,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 631 transitions. [2023-09-01 03:26:53,770 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43910925539318024 [2023-09-01 03:26:53,770 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 631 transitions. [2023-09-01 03:26:53,770 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 631 transitions. [2023-09-01 03:26:53,771 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:26:53,771 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 631 transitions. [2023-09-01 03:26:53,771 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 210.33333333333334) internal successors, (631), 3 states have internal predecessors, (631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:26:53,773 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 479.0) internal successors, (1916), 4 states have internal predecessors, (1916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:26:53,773 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 479.0) internal successors, (1916), 4 states have internal predecessors, (1916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:26:53,773 INFO L175 Difference]: Start difference. First operand has 106 places, 57 transitions, 405 flow. Second operand 3 states and 631 transitions. [2023-09-01 03:26:53,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 56 transitions, 503 flow [2023-09-01 03:26:53,818 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 56 transitions, 487 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-09-01 03:26:53,818 INFO L231 Difference]: Finished difference. Result has 102 places, 56 transitions, 387 flow [2023-09-01 03:26:53,819 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=385, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=387, PETRI_PLACES=102, PETRI_TRANSITIONS=56} [2023-09-01 03:26:53,819 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 41 predicate places. [2023-09-01 03:26:53,819 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 56 transitions, 387 flow [2023-09-01 03:26:53,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 203.25) internal successors, (813), 4 states have internal predecessors, (813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:26:53,820 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:26:53,820 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:26:53,831 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2023-09-01 03:26:54,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:26:54,027 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-09-01 03:26:54,028 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:26:54,028 INFO L85 PathProgramCache]: Analyzing trace with hash -1238589692, now seen corresponding path program 1 times [2023-09-01 03:26:54,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:26:54,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [710120793] [2023-09-01 03:26:54,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:26:54,032 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:26:54,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:26:54,034 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:26:54,036 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2023-09-01 03:26:54,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:26:54,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 21 conjunts are in the unsatisfiable core [2023-09-01 03:26:54,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:26:54,240 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-09-01 03:26:54,241 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-09-01 03:26:54,465 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:26:54,465 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:26:55,081 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:26:55,081 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:26:55,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [710120793] [2023-09-01 03:26:55,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [710120793] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:26:55,081 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:26:55,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-09-01 03:26:55,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831110399] [2023-09-01 03:26:55,081 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:26:55,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-09-01 03:26:55,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:26:55,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-09-01 03:26:55,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-09-01 03:26:59,773 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 188 out of 479 [2023-09-01 03:26:59,774 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 56 transitions, 387 flow. Second operand has 10 states, 10 states have (on average 190.0) internal successors, (1900), 10 states have internal predecessors, (1900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:26:59,774 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:26:59,774 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 188 of 479 [2023-09-01 03:26:59,775 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:27:06,630 INFO L130 PetriNetUnfolder]: 18673/27249 cut-off events. [2023-09-01 03:27:06,630 INFO L131 PetriNetUnfolder]: For 42397/46567 co-relation queries the response was YES. [2023-09-01 03:27:06,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86959 conditions, 27249 events. 18673/27249 cut-off events. For 42397/46567 co-relation queries the response was YES. Maximal size of possible extension queue 1144. Compared 179374 event pairs, 13709 based on Foata normal form. 4170/27878 useless extension candidates. Maximal degree in co-relation 86918. Up to 18205 conditions per place. [2023-09-01 03:27:06,784 INFO L137 encePairwiseOnDemand]: 471/479 looper letters, 116 selfloop transitions, 15 changer transitions 0/135 dead transitions. [2023-09-01 03:27:06,784 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 135 transitions, 975 flow [2023-09-01 03:27:06,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-09-01 03:27:06,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-09-01 03:27:06,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2177 transitions. [2023-09-01 03:27:06,787 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.413171379768457 [2023-09-01 03:27:06,787 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2177 transitions. [2023-09-01 03:27:06,787 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2177 transitions. [2023-09-01 03:27:06,788 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:27:06,788 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2177 transitions. [2023-09-01 03:27:06,790 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 197.9090909090909) internal successors, (2177), 11 states have internal predecessors, (2177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:27:06,792 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 479.0) internal successors, (5748), 12 states have internal predecessors, (5748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:27:06,793 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 479.0) internal successors, (5748), 12 states have internal predecessors, (5748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:27:06,793 INFO L175 Difference]: Start difference. First operand has 102 places, 56 transitions, 387 flow. Second operand 11 states and 2177 transitions. [2023-09-01 03:27:06,793 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 135 transitions, 975 flow [2023-09-01 03:27:06,819 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 135 transitions, 974 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 03:27:06,820 INFO L231 Difference]: Finished difference. Result has 113 places, 60 transitions, 440 flow [2023-09-01 03:27:06,821 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=386, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=440, PETRI_PLACES=113, PETRI_TRANSITIONS=60} [2023-09-01 03:27:06,821 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 52 predicate places. [2023-09-01 03:27:06,821 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 60 transitions, 440 flow [2023-09-01 03:27:06,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 190.0) internal successors, (1900), 10 states have internal predecessors, (1900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:27:06,821 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:27:06,822 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:27:06,829 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Ended with exit code 0 [2023-09-01 03:27:07,028 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 [2023-09-01 03:27:07,029 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-09-01 03:27:07,029 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:27:07,029 INFO L85 PathProgramCache]: Analyzing trace with hash 1260659726, now seen corresponding path program 2 times [2023-09-01 03:27:07,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:27:07,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [933432674] [2023-09-01 03:27:07,030 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 03:27:07,030 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:27:07,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:27:07,031 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) [2023-09-01 03:27:07,033 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 [2023-09-01 03:27:07,157 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 03:27:07,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 03:27:07,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 18 conjunts are in the unsatisfiable core [2023-09-01 03:27:07,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:27:07,235 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-09-01 03:27:07,235 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-09-01 03:27:07,469 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:27:07,469 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:27:07,548 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 03:27:07,548 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 105 treesize of output 70 [2023-09-01 03:27:07,560 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 70 treesize of output 68 [2023-09-01 03:27:08,007 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:27:08,007 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:27:08,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [933432674] [2023-09-01 03:27:08,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [933432674] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:27:08,008 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:27:08,008 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2023-09-01 03:27:08,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828912490] [2023-09-01 03:27:08,008 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:27:08,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-09-01 03:27:08,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:27:08,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-09-01 03:27:08,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2023-09-01 03:27:13,936 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 188 out of 479 [2023-09-01 03:27:13,937 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 60 transitions, 440 flow. Second operand has 14 states, 14 states have (on average 189.57142857142858) internal successors, (2654), 14 states have internal predecessors, (2654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:27:13,937 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:27:13,937 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 188 of 479 [2023-09-01 03:27:13,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:27:22,013 INFO L130 PetriNetUnfolder]: 25389/36045 cut-off events. [2023-09-01 03:27:22,014 INFO L131 PetriNetUnfolder]: For 58145/61059 co-relation queries the response was YES. [2023-09-01 03:27:22,276 INFO L83 FinitePrefix]: Finished finitePrefix Result has 130599 conditions, 36045 events. 25389/36045 cut-off events. For 58145/61059 co-relation queries the response was YES. Maximal size of possible extension queue 1685. Compared 244713 event pairs, 9181 based on Foata normal form. 3462/36103 useless extension candidates. Maximal degree in co-relation 130555. Up to 11144 conditions per place. [2023-09-01 03:27:22,405 INFO L137 encePairwiseOnDemand]: 471/479 looper letters, 248 selfloop transitions, 26 changer transitions 0/279 dead transitions. [2023-09-01 03:27:22,406 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 279 transitions, 2103 flow [2023-09-01 03:27:22,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-09-01 03:27:22,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-09-01 03:27:22,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 3416 transitions. [2023-09-01 03:27:22,410 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41950141225592535 [2023-09-01 03:27:22,410 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 3416 transitions. [2023-09-01 03:27:22,410 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 3416 transitions. [2023-09-01 03:27:22,411 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:27:22,411 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 3416 transitions. [2023-09-01 03:27:22,414 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 200.94117647058823) internal successors, (3416), 17 states have internal predecessors, (3416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:27:22,419 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 479.0) internal successors, (8622), 18 states have internal predecessors, (8622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:27:22,419 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 479.0) internal successors, (8622), 18 states have internal predecessors, (8622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:27:22,419 INFO L175 Difference]: Start difference. First operand has 113 places, 60 transitions, 440 flow. Second operand 17 states and 3416 transitions. [2023-09-01 03:27:22,420 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 279 transitions, 2103 flow [2023-09-01 03:27:22,756 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 279 transitions, 2059 flow, removed 4 selfloop flow, removed 8 redundant places. [2023-09-01 03:27:22,758 INFO L231 Difference]: Finished difference. Result has 123 places, 75 transitions, 582 flow [2023-09-01 03:27:22,759 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=402, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=582, PETRI_PLACES=123, PETRI_TRANSITIONS=75} [2023-09-01 03:27:22,759 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 62 predicate places. [2023-09-01 03:27:22,759 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 75 transitions, 582 flow [2023-09-01 03:27:22,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 189.57142857142858) internal successors, (2654), 14 states have internal predecessors, (2654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:27:22,760 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:27:22,760 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:27:22,769 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2023-09-01 03:27:22,969 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 [2023-09-01 03:27:22,970 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-09-01 03:27:22,970 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:27:22,970 INFO L85 PathProgramCache]: Analyzing trace with hash 258430453, now seen corresponding path program 1 times [2023-09-01 03:27:22,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:27:22,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1660660017] [2023-09-01 03:27:22,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:27:22,971 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:27:22,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:27:22,972 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) [2023-09-01 03:27:22,974 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 [2023-09-01 03:27:23,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:27:23,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 15 conjunts are in the unsatisfiable core [2023-09-01 03:27:23,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:27:23,216 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:27:23,216 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:27:23,402 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:27:23,402 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:27:23,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1660660017] [2023-09-01 03:27:23,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1660660017] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:27:23,402 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:27:23,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-09-01 03:27:23,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81013438] [2023-09-01 03:27:23,402 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:27:23,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 03:27:23,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:27:23,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 03:27:23,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2023-09-01 03:27:23,965 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 195 out of 479 [2023-09-01 03:27:23,967 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 75 transitions, 582 flow. Second operand has 12 states, 12 states have (on average 196.83333333333334) internal successors, (2362), 12 states have internal predecessors, (2362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:27:23,967 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:27:23,967 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 195 of 479 [2023-09-01 03:27:23,967 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:27:30,539 INFO L130 PetriNetUnfolder]: 21947/32033 cut-off events. [2023-09-01 03:27:30,539 INFO L131 PetriNetUnfolder]: For 80954/85769 co-relation queries the response was YES. [2023-09-01 03:27:30,667 INFO L83 FinitePrefix]: Finished finitePrefix Result has 122623 conditions, 32033 events. 21947/32033 cut-off events. For 80954/85769 co-relation queries the response was YES. Maximal size of possible extension queue 1376. Compared 219763 event pairs, 13253 based on Foata normal form. 4369/34513 useless extension candidates. Maximal degree in co-relation 122580. Up to 23861 conditions per place. [2023-09-01 03:27:30,757 INFO L137 encePairwiseOnDemand]: 471/479 looper letters, 116 selfloop transitions, 14 changer transitions 0/136 dead transitions. [2023-09-01 03:27:30,758 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 136 transitions, 1158 flow [2023-09-01 03:27:30,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-09-01 03:27:30,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-09-01 03:27:30,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2033 transitions. [2023-09-01 03:27:30,761 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4244258872651357 [2023-09-01 03:27:30,761 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2033 transitions. [2023-09-01 03:27:30,761 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2033 transitions. [2023-09-01 03:27:30,761 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:27:30,761 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2033 transitions. [2023-09-01 03:27:30,763 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 203.3) internal successors, (2033), 10 states have internal predecessors, (2033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:27:30,765 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 479.0) internal successors, (5269), 11 states have internal predecessors, (5269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:27:30,766 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 479.0) internal successors, (5269), 11 states have internal predecessors, (5269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:27:30,766 INFO L175 Difference]: Start difference. First operand has 123 places, 75 transitions, 582 flow. Second operand 10 states and 2033 transitions. [2023-09-01 03:27:30,766 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 136 transitions, 1158 flow [2023-09-01 03:27:31,028 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 136 transitions, 1109 flow, removed 16 selfloop flow, removed 8 redundant places. [2023-09-01 03:27:31,031 INFO L231 Difference]: Finished difference. Result has 126 places, 76 transitions, 589 flow [2023-09-01 03:27:31,031 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=543, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=589, PETRI_PLACES=126, PETRI_TRANSITIONS=76} [2023-09-01 03:27:31,033 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 65 predicate places. [2023-09-01 03:27:31,033 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 76 transitions, 589 flow [2023-09-01 03:27:31,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 196.83333333333334) internal successors, (2362), 12 states have internal predecessors, (2362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:27:31,033 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:27:31,033 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1] [2023-09-01 03:27:31,042 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 [2023-09-01 03:27:31,242 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 [2023-09-01 03:27:31,242 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-09-01 03:27:31,242 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:27:31,243 INFO L85 PathProgramCache]: Analyzing trace with hash 1655019014, now seen corresponding path program 3 times [2023-09-01 03:27:31,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:27:31,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2098758601] [2023-09-01 03:27:31,243 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 03:27:31,243 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:27:31,243 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:27:31,244 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) [2023-09-01 03:27:31,246 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 [2023-09-01 03:27:31,396 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-09-01 03:27:31,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 03:27:31,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 17 conjunts are in the unsatisfiable core [2023-09-01 03:27:31,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:27:31,484 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-09-01 03:27:31,484 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-09-01 03:27:31,850 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 63 [2023-09-01 03:27:31,875 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 03:27:31,876 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 107 treesize of output 107 [2023-09-01 03:27:31,882 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 91 treesize of output 87 [2023-09-01 03:27:31,915 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:27:31,915 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:27:32,012 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 03:27:32,016 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 105 treesize of output 70 [2023-09-01 03:27:32,032 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 70 treesize of output 68 [2023-09-01 03:27:32,229 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:27:32,230 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:27:32,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2098758601] [2023-09-01 03:27:32,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2098758601] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:27:32,230 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:27:32,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2023-09-01 03:27:32,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639444588] [2023-09-01 03:27:32,230 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:27:32,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-09-01 03:27:32,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:27:32,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-09-01 03:27:32,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2023-09-01 03:27:35,287 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 479 [2023-09-01 03:27:35,289 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 76 transitions, 589 flow. Second operand has 16 states, 16 states have (on average 186.375) internal successors, (2982), 16 states have internal predecessors, (2982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:27:35,289 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:27:35,289 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 479 [2023-09-01 03:27:35,289 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:27:42,195 INFO L130 PetriNetUnfolder]: 22994/32476 cut-off events. [2023-09-01 03:27:42,195 INFO L131 PetriNetUnfolder]: For 88692/91672 co-relation queries the response was YES. [2023-09-01 03:27:42,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 137289 conditions, 32476 events. 22994/32476 cut-off events. For 88692/91672 co-relation queries the response was YES. Maximal size of possible extension queue 1558. Compared 219960 event pairs, 8955 based on Foata normal form. 2972/32100 useless extension candidates. Maximal degree in co-relation 137246. Up to 16753 conditions per place. [2023-09-01 03:27:42,582 INFO L137 encePairwiseOnDemand]: 470/479 looper letters, 186 selfloop transitions, 14 changer transitions 0/207 dead transitions. [2023-09-01 03:27:42,583 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 207 transitions, 1629 flow [2023-09-01 03:27:42,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-09-01 03:27:42,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-09-01 03:27:42,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2928 transitions. [2023-09-01 03:27:42,588 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40751565762004177 [2023-09-01 03:27:42,588 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2928 transitions. [2023-09-01 03:27:42,588 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2928 transitions. [2023-09-01 03:27:42,589 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:27:42,589 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2928 transitions. [2023-09-01 03:27:42,592 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 195.2) internal successors, (2928), 15 states have internal predecessors, (2928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:27:42,597 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 479.0) internal successors, (7664), 16 states have internal predecessors, (7664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:27:42,597 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 479.0) internal successors, (7664), 16 states have internal predecessors, (7664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:27:42,598 INFO L175 Difference]: Start difference. First operand has 126 places, 76 transitions, 589 flow. Second operand 15 states and 2928 transitions. [2023-09-01 03:27:42,598 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 207 transitions, 1629 flow [2023-09-01 03:27:42,947 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 207 transitions, 1604 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-09-01 03:27:42,949 INFO L231 Difference]: Finished difference. Result has 140 places, 80 transitions, 655 flow [2023-09-01 03:27:42,950 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=570, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=655, PETRI_PLACES=140, PETRI_TRANSITIONS=80} [2023-09-01 03:27:42,950 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 79 predicate places. [2023-09-01 03:27:42,950 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 80 transitions, 655 flow [2023-09-01 03:27:42,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 186.375) internal successors, (2982), 16 states have internal predecessors, (2982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:27:42,951 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:27:42,951 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:27:42,977 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 (24)] Ended with exit code 0 [2023-09-01 03:27:43,162 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 [2023-09-01 03:27:43,163 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-09-01 03:27:43,163 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:27:43,163 INFO L85 PathProgramCache]: Analyzing trace with hash 662040120, now seen corresponding path program 2 times [2023-09-01 03:27:43,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:27:43,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [135009803] [2023-09-01 03:27:43,164 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 03:27:43,164 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:27:43,164 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:27:43,165 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) [2023-09-01 03:27:43,171 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 [2023-09-01 03:27:43,323 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 03:27:43,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 03:27:43,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 24 conjunts are in the unsatisfiable core [2023-09-01 03:27:43,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:27:43,437 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-09-01 03:27:43,437 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-09-01 03:27:43,797 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:27:43,797 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:27:45,450 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:27:45,450 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:27:45,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [135009803] [2023-09-01 03:27:45,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [135009803] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:27:45,450 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:27:45,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2023-09-01 03:27:45,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825783165] [2023-09-01 03:27:45,451 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:27:45,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-09-01 03:27:45,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:27:45,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-09-01 03:27:45,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2023-09-01 03:27:54,506 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 187 out of 479 [2023-09-01 03:27:54,507 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 80 transitions, 655 flow. Second operand has 14 states, 14 states have (on average 188.71428571428572) internal successors, (2642), 14 states have internal predecessors, (2642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:27:54,507 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:27:54,507 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 187 of 479 [2023-09-01 03:27:54,507 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:28:09,388 INFO L130 PetriNetUnfolder]: 25173/36360 cut-off events. [2023-09-01 03:28:09,388 INFO L131 PetriNetUnfolder]: For 122421/127960 co-relation queries the response was YES. [2023-09-01 03:28:09,679 INFO L83 FinitePrefix]: Finished finitePrefix Result has 157019 conditions, 36360 events. 25173/36360 cut-off events. For 122421/127960 co-relation queries the response was YES. Maximal size of possible extension queue 1519. Compared 247497 event pairs, 10637 based on Foata normal form. 5217/39478 useless extension candidates. Maximal degree in co-relation 156971. Up to 9536 conditions per place. [2023-09-01 03:28:09,805 INFO L137 encePairwiseOnDemand]: 471/479 looper letters, 246 selfloop transitions, 25 changer transitions 0/278 dead transitions. [2023-09-01 03:28:09,805 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 278 transitions, 2351 flow [2023-09-01 03:28:09,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-09-01 03:28:09,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-09-01 03:28:09,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 3762 transitions. [2023-09-01 03:28:09,810 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4133611691022965 [2023-09-01 03:28:09,810 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 3762 transitions. [2023-09-01 03:28:09,810 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 3762 transitions. [2023-09-01 03:28:09,811 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:28:09,811 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 3762 transitions. [2023-09-01 03:28:09,814 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 198.0) internal successors, (3762), 19 states have internal predecessors, (3762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:28:09,818 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 479.0) internal successors, (9580), 20 states have internal predecessors, (9580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:28:09,823 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 479.0) internal successors, (9580), 20 states have internal predecessors, (9580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:28:09,823 INFO L175 Difference]: Start difference. First operand has 140 places, 80 transitions, 655 flow. Second operand 19 states and 3762 transitions. [2023-09-01 03:28:09,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 278 transitions, 2351 flow [2023-09-01 03:28:10,300 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 278 transitions, 2306 flow, removed 6 selfloop flow, removed 7 redundant places. [2023-09-01 03:28:10,302 INFO L231 Difference]: Finished difference. Result has 155 places, 89 transitions, 768 flow [2023-09-01 03:28:10,302 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=629, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=768, PETRI_PLACES=155, PETRI_TRANSITIONS=89} [2023-09-01 03:28:10,302 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 94 predicate places. [2023-09-01 03:28:10,303 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 89 transitions, 768 flow [2023-09-01 03:28:10,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 188.71428571428572) internal successors, (2642), 14 states have internal predecessors, (2642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:28:10,303 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:28:10,303 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1] [2023-09-01 03:28:10,313 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 [2023-09-01 03:28:10,510 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 [2023-09-01 03:28:10,511 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-09-01 03:28:10,512 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:28:10,512 INFO L85 PathProgramCache]: Analyzing trace with hash 2058628681, now seen corresponding path program 4 times [2023-09-01 03:28:10,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:28:10,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1306507906] [2023-09-01 03:28:10,512 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 03:28:10,513 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:28:10,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:28:10,514 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) [2023-09-01 03:28:10,516 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 (26)] Waiting until timeout for monitored process [2023-09-01 03:28:10,640 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 03:28:10,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 03:28:10,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 21 conjunts are in the unsatisfiable core [2023-09-01 03:28:10,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:28:10,747 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-09-01 03:28:10,747 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-09-01 03:28:11,080 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 59 [2023-09-01 03:28:11,087 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 79 treesize of output 75 [2023-09-01 03:28:11,166 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:28:11,166 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:28:11,454 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 03:28:11,455 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 105 treesize of output 70 [2023-09-01 03:28:11,475 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 70 treesize of output 68 [2023-09-01 03:28:12,437 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:28:12,438 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:28:12,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1306507906] [2023-09-01 03:28:12,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1306507906] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:28:12,438 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:28:12,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2023-09-01 03:28:12,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775937377] [2023-09-01 03:28:12,438 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:28:12,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-09-01 03:28:12,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:28:12,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-09-01 03:28:12,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2023-09-01 03:28:21,823 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 184 out of 479 [2023-09-01 03:28:21,824 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 89 transitions, 768 flow. Second operand has 18 states, 18 states have (on average 185.33333333333334) internal successors, (3336), 18 states have internal predecessors, (3336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:28:21,824 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:28:21,824 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 184 of 479 [2023-09-01 03:28:21,824 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:28:26,561 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:28:37,988 INFO L130 PetriNetUnfolder]: 30921/43945 cut-off events. [2023-09-01 03:28:37,989 INFO L131 PetriNetUnfolder]: For 267388/273701 co-relation queries the response was YES. [2023-09-01 03:28:38,311 INFO L83 FinitePrefix]: Finished finitePrefix Result has 216975 conditions, 43945 events. 30921/43945 cut-off events. For 267388/273701 co-relation queries the response was YES. Maximal size of possible extension queue 1943. Compared 307385 event pairs, 9041 based on Foata normal form. 6323/50200 useless extension candidates. Maximal degree in co-relation 216924. Up to 13135 conditions per place. [2023-09-01 03:28:38,499 INFO L137 encePairwiseOnDemand]: 471/479 looper letters, 413 selfloop transitions, 41 changer transitions 0/463 dead transitions. [2023-09-01 03:28:38,500 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 463 transitions, 4051 flow [2023-09-01 03:28:38,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-09-01 03:28:38,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-09-01 03:28:38,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 4926 transitions. [2023-09-01 03:28:38,505 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.411356993736952 [2023-09-01 03:28:38,506 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 4926 transitions. [2023-09-01 03:28:38,506 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 4926 transitions. [2023-09-01 03:28:38,507 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:28:38,507 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 4926 transitions. [2023-09-01 03:28:38,511 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 197.04) internal successors, (4926), 25 states have internal predecessors, (4926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:28:38,518 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 479.0) internal successors, (12454), 26 states have internal predecessors, (12454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:28:38,519 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 479.0) internal successors, (12454), 26 states have internal predecessors, (12454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:28:38,519 INFO L175 Difference]: Start difference. First operand has 155 places, 89 transitions, 768 flow. Second operand 25 states and 4926 transitions. [2023-09-01 03:28:38,519 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 463 transitions, 4051 flow [2023-09-01 03:28:39,355 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 463 transitions, 3940 flow, removed 46 selfloop flow, removed 7 redundant places. [2023-09-01 03:28:39,358 INFO L231 Difference]: Finished difference. Result has 174 places, 110 transitions, 1052 flow [2023-09-01 03:28:39,359 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=740, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=1052, PETRI_PLACES=174, PETRI_TRANSITIONS=110} [2023-09-01 03:28:39,359 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 113 predicate places. [2023-09-01 03:28:39,359 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 110 transitions, 1052 flow [2023-09-01 03:28:39,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 185.33333333333334) internal successors, (3336), 18 states have internal predecessors, (3336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:28:39,360 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:28:39,360 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1] [2023-09-01 03:28:39,368 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 (26)] Ended with exit code 0 [2023-09-01 03:28:39,567 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 [2023-09-01 03:28:39,567 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-09-01 03:28:39,568 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:28:39,568 INFO L85 PathProgramCache]: Analyzing trace with hash -441930218, now seen corresponding path program 3 times [2023-09-01 03:28:39,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:28:39,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [505627364] [2023-09-01 03:28:39,568 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 03:28:39,568 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:28:39,568 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:28:39,569 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) [2023-09-01 03:28:39,571 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 [2023-09-01 03:28:39,744 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-09-01 03:28:39,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 03:28:39,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 20 conjunts are in the unsatisfiable core [2023-09-01 03:28:39,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:28:39,820 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-09-01 03:28:39,820 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-09-01 03:28:40,085 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:28:40,085 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:28:42,145 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:28:42,145 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:28:42,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [505627364] [2023-09-01 03:28:42,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [505627364] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:28:42,145 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:28:42,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2023-09-01 03:28:42,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885064258] [2023-09-01 03:28:42,146 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:28:42,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-09-01 03:28:42,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:28:42,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-09-01 03:28:42,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2023-09-01 03:28:57,358 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 198 out of 479 [2023-09-01 03:28:57,360 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 110 transitions, 1052 flow. Second operand has 24 states, 24 states have (on average 199.0) internal successors, (4776), 24 states have internal predecessors, (4776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:28:57,360 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:28:57,360 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 198 of 479 [2023-09-01 03:28:57,360 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:29:26,744 INFO L130 PetriNetUnfolder]: 57365/81069 cut-off events. [2023-09-01 03:29:26,744 INFO L131 PetriNetUnfolder]: For 502166/517285 co-relation queries the response was YES. [2023-09-01 03:29:27,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 410574 conditions, 81069 events. 57365/81069 cut-off events. For 502166/517285 co-relation queries the response was YES. Maximal size of possible extension queue 2463. Compared 568403 event pairs, 41905 based on Foata normal form. 12287/93286 useless extension candidates. Maximal degree in co-relation 410520. Up to 23713 conditions per place. [2023-09-01 03:29:27,906 INFO L137 encePairwiseOnDemand]: 475/479 looper letters, 641 selfloop transitions, 24 changer transitions 0/679 dead transitions. [2023-09-01 03:29:27,906 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 679 transitions, 6261 flow [2023-09-01 03:29:27,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-09-01 03:29:27,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-09-01 03:29:27,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 5287 transitions. [2023-09-01 03:29:27,911 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4598990953375087 [2023-09-01 03:29:27,911 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 5287 transitions. [2023-09-01 03:29:27,911 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 5287 transitions. [2023-09-01 03:29:27,912 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:29:27,912 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 5287 transitions. [2023-09-01 03:29:27,916 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 220.29166666666666) internal successors, (5287), 24 states have internal predecessors, (5287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:29:27,921 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 479.0) internal successors, (11975), 25 states have internal predecessors, (11975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:29:27,922 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 479.0) internal successors, (11975), 25 states have internal predecessors, (11975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:29:27,922 INFO L175 Difference]: Start difference. First operand has 174 places, 110 transitions, 1052 flow. Second operand 24 states and 5287 transitions. [2023-09-01 03:29:27,922 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 679 transitions, 6261 flow [2023-09-01 03:29:31,962 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 679 transitions, 6052 flow, removed 85 selfloop flow, removed 14 redundant places. [2023-09-01 03:29:31,968 INFO L231 Difference]: Finished difference. Result has 196 places, 123 transitions, 1155 flow [2023-09-01 03:29:31,968 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=957, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=1155, PETRI_PLACES=196, PETRI_TRANSITIONS=123} [2023-09-01 03:29:32,073 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 135 predicate places. [2023-09-01 03:29:32,073 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 123 transitions, 1155 flow [2023-09-01 03:29:32,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 199.0) internal successors, (4776), 24 states have internal predecessors, (4776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:29:32,074 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:29:32,074 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:29:32,082 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2023-09-01 03:29:32,274 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 [2023-09-01 03:29:32,274 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-09-01 03:29:32,274 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:29:32,274 INFO L85 PathProgramCache]: Analyzing trace with hash 1298889409, now seen corresponding path program 2 times [2023-09-01 03:29:32,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:29:32,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [980848630] [2023-09-01 03:29:32,275 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 03:29:32,275 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:29:32,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:29:32,276 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) [2023-09-01 03:29:32,286 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 [2023-09-01 03:29:32,403 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-09-01 03:29:32,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 03:29:32,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2023-09-01 03:29:32,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:29:32,505 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-09-01 03:29:32,505 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-09-01 03:29:32,676 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-09-01 03:29:32,676 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:29:32,676 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:29:32,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [980848630] [2023-09-01 03:29:32,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [980848630] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:29:32,676 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:29:32,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 03:29:32,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680753847] [2023-09-01 03:29:32,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:29:32,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 03:29:32,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:29:32,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 03:29:32,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-09-01 03:29:33,231 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 479 [2023-09-01 03:29:33,232 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 123 transitions, 1155 flow. Second operand has 5 states, 5 states have (on average 195.0) internal successors, (975), 5 states have internal predecessors, (975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:29:33,232 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:29:33,232 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 479 [2023-09-01 03:29:33,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:29:47,740 INFO L130 PetriNetUnfolder]: 58699/85002 cut-off events. [2023-09-01 03:29:47,741 INFO L131 PetriNetUnfolder]: For 480152/494840 co-relation queries the response was YES. [2023-09-01 03:29:48,837 INFO L83 FinitePrefix]: Finished finitePrefix Result has 404581 conditions, 85002 events. 58699/85002 cut-off events. For 480152/494840 co-relation queries the response was YES. Maximal size of possible extension queue 2064. Compared 618227 event pairs, 39436 based on Foata normal form. 19112/103952 useless extension candidates. Maximal degree in co-relation 404517. Up to 70706 conditions per place. [2023-09-01 03:29:49,172 INFO L137 encePairwiseOnDemand]: 473/479 looper letters, 147 selfloop transitions, 21 changer transitions 0/177 dead transitions. [2023-09-01 03:29:49,177 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 177 transitions, 1927 flow [2023-09-01 03:29:49,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 03:29:49,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 03:29:49,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1009 transitions. [2023-09-01 03:29:49,186 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.421294363256785 [2023-09-01 03:29:49,187 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1009 transitions. [2023-09-01 03:29:49,187 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1009 transitions. [2023-09-01 03:29:49,187 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:29:49,187 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1009 transitions. [2023-09-01 03:29:49,188 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 201.8) internal successors, (1009), 5 states have internal predecessors, (1009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:29:49,213 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 479.0) internal successors, (2874), 6 states have internal predecessors, (2874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:29:49,214 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 479.0) internal successors, (2874), 6 states have internal predecessors, (2874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:29:49,214 INFO L175 Difference]: Start difference. First operand has 196 places, 123 transitions, 1155 flow. Second operand 5 states and 1009 transitions. [2023-09-01 03:29:49,214 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 177 transitions, 1927 flow [2023-09-01 03:29:59,218 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 177 transitions, 1871 flow, removed 17 selfloop flow, removed 10 redundant places. [2023-09-01 03:29:59,220 INFO L231 Difference]: Finished difference. Result has 190 places, 123 transitions, 1159 flow [2023-09-01 03:29:59,220 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=1089, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1159, PETRI_PLACES=190, PETRI_TRANSITIONS=123} [2023-09-01 03:29:59,221 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 129 predicate places. [2023-09-01 03:29:59,221 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 123 transitions, 1159 flow [2023-09-01 03:29:59,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 195.0) internal successors, (975), 5 states have internal predecessors, (975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:29:59,221 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:29:59,221 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:29:59,229 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 (28)] Forceful destruction successful, exit code 0 [2023-09-01 03:29:59,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:29:59,429 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-09-01 03:29:59,429 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:29:59,430 INFO L85 PathProgramCache]: Analyzing trace with hash 313376625, now seen corresponding path program 3 times [2023-09-01 03:29:59,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:29:59,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1040690437] [2023-09-01 03:29:59,430 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 03:29:59,430 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:29:59,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:29:59,431 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:29:59,433 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2023-09-01 03:29:59,610 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-09-01 03:29:59,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 03:29:59,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 25 conjunts are in the unsatisfiable core [2023-09-01 03:29:59,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:29:59,712 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-09-01 03:29:59,712 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-09-01 03:30:00,209 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 59 [2023-09-01 03:30:00,212 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 79 treesize of output 75 [2023-09-01 03:30:00,248 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:30:00,248 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:30:00,532 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 03:30:00,533 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 105 treesize of output 70 [2023-09-01 03:30:00,542 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 70 treesize of output 68 [2023-09-01 03:30:01,148 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:30:01,148 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:30:01,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1040690437] [2023-09-01 03:30:01,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1040690437] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:30:01,148 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:30:01,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2023-09-01 03:30:01,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268787120] [2023-09-01 03:30:01,149 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:30:01,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-09-01 03:30:01,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:30:01,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-09-01 03:30:01,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2023-09-01 03:30:09,605 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 479 [2023-09-01 03:30:09,607 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 123 transitions, 1159 flow. Second operand has 16 states, 16 states have (on average 181.625) internal successors, (2906), 16 states have internal predecessors, (2906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:30:09,607 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:30:09,607 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 479 [2023-09-01 03:30:09,607 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:30:30,351 INFO L130 PetriNetUnfolder]: 52027/75250 cut-off events. [2023-09-01 03:30:30,351 INFO L131 PetriNetUnfolder]: For 724872/744549 co-relation queries the response was YES. [2023-09-01 03:30:31,421 INFO L83 FinitePrefix]: Finished finitePrefix Result has 387706 conditions, 75250 events. 52027/75250 cut-off events. For 724872/744549 co-relation queries the response was YES. Maximal size of possible extension queue 1809. Compared 539567 event pairs, 17077 based on Foata normal form. 18991/94124 useless extension candidates. Maximal degree in co-relation 387640. Up to 28904 conditions per place. [2023-09-01 03:30:31,750 INFO L137 encePairwiseOnDemand]: 470/479 looper letters, 361 selfloop transitions, 32 changer transitions 0/403 dead transitions. [2023-09-01 03:30:31,751 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 403 transitions, 3969 flow [2023-09-01 03:30:31,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-09-01 03:30:31,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-09-01 03:30:31,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 4018 transitions. [2023-09-01 03:30:31,761 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39944328462073764 [2023-09-01 03:30:31,761 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 4018 transitions. [2023-09-01 03:30:31,761 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 4018 transitions. [2023-09-01 03:30:31,763 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:30:31,763 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 4018 transitions. [2023-09-01 03:30:31,768 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 191.33333333333334) internal successors, (4018), 21 states have internal predecessors, (4018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:30:31,773 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 479.0) internal successors, (10538), 22 states have internal predecessors, (10538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:30:31,774 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 479.0) internal successors, (10538), 22 states have internal predecessors, (10538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:30:31,774 INFO L175 Difference]: Start difference. First operand has 190 places, 123 transitions, 1159 flow. Second operand 21 states and 4018 transitions. [2023-09-01 03:30:31,774 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 403 transitions, 3969 flow [2023-09-01 03:30:36,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 403 transitions, 3850 flow, removed 36 selfloop flow, removed 3 redundant places. [2023-09-01 03:30:36,767 INFO L231 Difference]: Finished difference. Result has 208 places, 127 transitions, 1217 flow [2023-09-01 03:30:36,767 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=1086, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1217, PETRI_PLACES=208, PETRI_TRANSITIONS=127} [2023-09-01 03:30:36,768 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 147 predicate places. [2023-09-01 03:30:36,768 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 127 transitions, 1217 flow [2023-09-01 03:30:36,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 181.625) internal successors, (2906), 16 states have internal predecessors, (2906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:30:36,768 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:30:36,768 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:30:36,780 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2023-09-01 03:30:36,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:30:36,969 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-09-01 03:30:36,969 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:30:36,970 INFO L85 PathProgramCache]: Analyzing trace with hash 370245828, now seen corresponding path program 3 times [2023-09-01 03:30:36,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:30:36,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1586765986] [2023-09-01 03:30:36,970 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 03:30:36,970 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:30:36,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:30:36,971 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:30:36,973 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2023-09-01 03:30:37,126 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-09-01 03:30:37,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 03:30:37,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 23 conjunts are in the unsatisfiable core [2023-09-01 03:30:37,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:30:37,208 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-09-01 03:30:37,208 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-09-01 03:30:37,482 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 03:30:37,482 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:30:39,050 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 03:30:39,050 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:30:39,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1586765986] [2023-09-01 03:30:39,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1586765986] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:30:39,051 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:30:39,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-09-01 03:30:39,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927732549] [2023-09-01 03:30:39,051 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:30:39,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 03:30:39,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:30:39,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 03:30:39,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2023-09-01 03:30:41,658 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 03:30:44,751 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 03:30:48,552 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 03:30:50,160 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 03:30:58,670 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 479 [2023-09-01 03:30:58,671 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 127 transitions, 1217 flow. Second operand has 12 states, 12 states have (on average 193.0) internal successors, (2316), 12 states have internal predecessors, (2316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:30:58,671 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:30:58,671 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 479 [2023-09-01 03:30:58,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:31:15,886 INFO L130 PetriNetUnfolder]: 62385/90685 cut-off events. [2023-09-01 03:31:15,886 INFO L131 PetriNetUnfolder]: For 518290/535282 co-relation queries the response was YES. [2023-09-01 03:31:17,002 INFO L83 FinitePrefix]: Finished finitePrefix Result has 453180 conditions, 90685 events. 62385/90685 cut-off events. For 518290/535282 co-relation queries the response was YES. Maximal size of possible extension queue 2183. Compared 673885 event pairs, 10015 based on Foata normal form. 19988/110517 useless extension candidates. Maximal degree in co-relation 453112. Up to 31046 conditions per place. [2023-09-01 03:31:17,308 INFO L137 encePairwiseOnDemand]: 474/479 looper letters, 269 selfloop transitions, 23 changer transitions 0/301 dead transitions. [2023-09-01 03:31:17,308 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 301 transitions, 3299 flow [2023-09-01 03:31:17,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-09-01 03:31:17,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-09-01 03:31:17,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1410 transitions. [2023-09-01 03:31:17,311 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42051893826424097 [2023-09-01 03:31:17,311 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1410 transitions. [2023-09-01 03:31:17,311 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1410 transitions. [2023-09-01 03:31:17,312 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:31:17,312 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1410 transitions. [2023-09-01 03:31:17,313 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 201.42857142857142) internal successors, (1410), 7 states have internal predecessors, (1410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:31:17,315 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 479.0) internal successors, (3832), 8 states have internal predecessors, (3832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:31:17,315 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 479.0) internal successors, (3832), 8 states have internal predecessors, (3832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:31:17,315 INFO L175 Difference]: Start difference. First operand has 208 places, 127 transitions, 1217 flow. Second operand 7 states and 1410 transitions. [2023-09-01 03:31:17,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 301 transitions, 3299 flow [2023-09-01 03:31:21,559 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 301 transitions, 3191 flow, removed 7 selfloop flow, removed 12 redundant places. [2023-09-01 03:31:21,562 INFO L231 Difference]: Finished difference. Result has 202 places, 127 transitions, 1220 flow [2023-09-01 03:31:21,562 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=1155, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1220, PETRI_PLACES=202, PETRI_TRANSITIONS=127} [2023-09-01 03:31:21,564 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 141 predicate places. [2023-09-01 03:31:21,564 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 127 transitions, 1220 flow [2023-09-01 03:31:21,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 193.0) internal successors, (2316), 12 states have internal predecessors, (2316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:31:21,564 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:31:21,565 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1] [2023-09-01 03:31:21,573 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 (30)] Ended with exit code 0 [2023-09-01 03:31:21,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:31:21,773 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-09-01 03:31:21,773 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:31:21,774 INFO L85 PathProgramCache]: Analyzing trace with hash -1637588318, now seen corresponding path program 5 times [2023-09-01 03:31:21,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:31:21,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [619163348] [2023-09-01 03:31:21,774 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 03:31:21,774 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:31:21,775 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:31:21,775 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:31:21,778 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2023-09-01 03:31:21,993 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-09-01 03:31:21,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 03:31:22,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 25 conjunts are in the unsatisfiable core [2023-09-01 03:31:22,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:31:22,148 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-09-01 03:31:22,149 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-09-01 03:31:22,820 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 59 [2023-09-01 03:31:22,833 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 79 treesize of output 75 [2023-09-01 03:31:22,881 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:31:22,881 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:31:23,368 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 03:31:23,368 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 105 treesize of output 70 [2023-09-01 03:31:23,383 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 70 treesize of output 68 [2023-09-01 03:31:24,419 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:31:24,420 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:31:24,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [619163348] [2023-09-01 03:31:24,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [619163348] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:31:24,420 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:31:24,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2023-09-01 03:31:24,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833326745] [2023-09-01 03:31:24,421 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:31:24,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-09-01 03:31:24,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:31:24,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-09-01 03:31:24,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=282, Unknown=0, NotChecked=0, Total=380 [2023-09-01 03:31:39,789 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 479 [2023-09-01 03:31:39,791 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 127 transitions, 1220 flow. Second operand has 20 states, 20 states have (on average 182.4) internal successors, (3648), 20 states have internal predecessors, (3648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:31:39,791 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:31:39,791 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 479 [2023-09-01 03:31:39,791 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:32:15,468 INFO L130 PetriNetUnfolder]: 56340/81953 cut-off events. [2023-09-01 03:32:15,468 INFO L131 PetriNetUnfolder]: For 623152/641219 co-relation queries the response was YES. [2023-09-01 03:32:16,792 INFO L83 FinitePrefix]: Finished finitePrefix Result has 412164 conditions, 81953 events. 56340/81953 cut-off events. For 623152/641219 co-relation queries the response was YES. Maximal size of possible extension queue 2105. Compared 601569 event pairs, 13175 based on Foata normal form. 16387/98270 useless extension candidates. Maximal degree in co-relation 412096. Up to 35280 conditions per place. [2023-09-01 03:32:17,124 INFO L137 encePairwiseOnDemand]: 470/479 looper letters, 588 selfloop transitions, 54 changer transitions 0/651 dead transitions. [2023-09-01 03:32:17,124 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 651 transitions, 6049 flow [2023-09-01 03:32:17,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-09-01 03:32:17,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-09-01 03:32:17,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 7089 transitions. [2023-09-01 03:32:17,131 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39998871522879875 [2023-09-01 03:32:17,131 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 7089 transitions. [2023-09-01 03:32:17,132 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 7089 transitions. [2023-09-01 03:32:17,133 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:32:17,133 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 7089 transitions. [2023-09-01 03:32:17,150 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 191.59459459459458) internal successors, (7089), 37 states have internal predecessors, (7089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:32:17,169 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 479.0) internal successors, (18202), 38 states have internal predecessors, (18202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:32:17,170 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 479.0) internal successors, (18202), 38 states have internal predecessors, (18202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:32:17,171 INFO L175 Difference]: Start difference. First operand has 202 places, 127 transitions, 1220 flow. Second operand 37 states and 7089 transitions. [2023-09-01 03:32:17,171 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 651 transitions, 6049 flow [2023-09-01 03:32:22,623 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 651 transitions, 5938 flow, removed 22 selfloop flow, removed 4 redundant places. [2023-09-01 03:32:22,627 INFO L231 Difference]: Finished difference. Result has 236 places, 133 transitions, 1356 flow [2023-09-01 03:32:22,628 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=1159, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=1356, PETRI_PLACES=236, PETRI_TRANSITIONS=133} [2023-09-01 03:32:22,628 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 175 predicate places. [2023-09-01 03:32:22,628 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 133 transitions, 1356 flow [2023-09-01 03:32:22,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 182.4) internal successors, (3648), 20 states have internal predecessors, (3648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:32:22,629 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:32:22,629 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:32:22,637 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2023-09-01 03:32:22,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:32:22,838 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-09-01 03:32:22,838 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:32:22,838 INFO L85 PathProgramCache]: Analyzing trace with hash 640261326, now seen corresponding path program 4 times [2023-09-01 03:32:22,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:32:22,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [482380392] [2023-09-01 03:32:22,838 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 03:32:22,838 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:32:22,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:32:22,839 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:32:22,841 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2023-09-01 03:32:22,996 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 03:32:22,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 03:32:23,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 22 conjunts are in the unsatisfiable core [2023-09-01 03:32:23,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:32:23,089 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-09-01 03:32:23,090 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-09-01 03:32:23,550 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:32:23,550 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:32:23,685 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 03:32:23,685 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 105 treesize of output 70 [2023-09-01 03:32:23,693 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 70 treesize of output 68 [2023-09-01 03:32:25,176 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:32:25,176 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:32:25,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [482380392] [2023-09-01 03:32:25,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [482380392] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:32:25,176 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:32:25,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 20 [2023-09-01 03:32:25,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194457106] [2023-09-01 03:32:25,177 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:32:25,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-09-01 03:32:25,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:32:25,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-09-01 03:32:25,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2023-09-01 03:32:42,655 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 188 out of 479 [2023-09-01 03:32:42,657 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 133 transitions, 1356 flow. Second operand has 22 states, 22 states have (on average 189.36363636363637) internal successors, (4166), 22 states have internal predecessors, (4166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:32:42,657 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:32:42,657 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 188 of 479 [2023-09-01 03:32:42,657 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:33:17,243 INFO L130 PetriNetUnfolder]: 78699/114474 cut-off events. [2023-09-01 03:33:17,244 INFO L131 PetriNetUnfolder]: For 943143/965209 co-relation queries the response was YES. [2023-09-01 03:33:18,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 599689 conditions, 114474 events. 78699/114474 cut-off events. For 943143/965209 co-relation queries the response was YES. Maximal size of possible extension queue 2954. Compared 858349 event pairs, 28817 based on Foata normal form. 22718/137169 useless extension candidates. Maximal degree in co-relation 599618. Up to 25500 conditions per place. [2023-09-01 03:33:19,277 INFO L137 encePairwiseOnDemand]: 471/479 looper letters, 846 selfloop transitions, 65 changer transitions 0/921 dead transitions. [2023-09-01 03:33:19,277 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 921 transitions, 9732 flow [2023-09-01 03:33:19,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-09-01 03:33:19,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2023-09-01 03:33:19,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 8834 transitions. [2023-09-01 03:33:19,286 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41914974378439934 [2023-09-01 03:33:19,286 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 8834 transitions. [2023-09-01 03:33:19,286 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 8834 transitions. [2023-09-01 03:33:19,287 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:33:19,287 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 8834 transitions. [2023-09-01 03:33:19,293 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 200.77272727272728) internal successors, (8834), 44 states have internal predecessors, (8834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:33:19,302 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 479.0) internal successors, (21555), 45 states have internal predecessors, (21555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:33:19,303 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 479.0) internal successors, (21555), 45 states have internal predecessors, (21555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:33:19,303 INFO L175 Difference]: Start difference. First operand has 236 places, 133 transitions, 1356 flow. Second operand 44 states and 8834 transitions. [2023-09-01 03:33:19,303 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 921 transitions, 9732 flow [2023-09-01 03:33:28,694 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 921 transitions, 9197 flow, removed 44 selfloop flow, removed 30 redundant places. [2023-09-01 03:33:28,700 INFO L231 Difference]: Finished difference. Result has 260 places, 167 transitions, 1846 flow [2023-09-01 03:33:28,700 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=1246, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=1846, PETRI_PLACES=260, PETRI_TRANSITIONS=167} [2023-09-01 03:33:28,700 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 199 predicate places. [2023-09-01 03:33:28,700 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 167 transitions, 1846 flow [2023-09-01 03:33:28,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 189.36363636363637) internal successors, (4166), 22 states have internal predecessors, (4166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:33:28,701 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:33:28,701 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:33:28,709 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 (32)] Forceful destruction successful, exit code 0 [2023-09-01 03:33:28,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:33:28,903 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-09-01 03:33:28,903 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:33:28,903 INFO L85 PathProgramCache]: Analyzing trace with hash -521089833, now seen corresponding path program 5 times [2023-09-01 03:33:28,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:33:28,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [428797195] [2023-09-01 03:33:28,904 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 03:33:28,904 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:33:28,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:33:28,906 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:33:28,908 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 (33)] Waiting until timeout for monitored process [2023-09-01 03:33:29,078 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-09-01 03:33:29,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 03:33:29,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 28 conjunts are in the unsatisfiable core [2023-09-01 03:33:29,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:33:29,239 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-09-01 03:33:29,239 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-09-01 03:33:29,750 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 59 [2023-09-01 03:33:29,754 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 79 treesize of output 75 [2023-09-01 03:33:29,834 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:33:29,835 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:33:30,201 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 03:33:30,202 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 105 treesize of output 70 [2023-09-01 03:33:30,212 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 70 treesize of output 68 [2023-09-01 03:33:31,462 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:33:31,462 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:33:31,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [428797195] [2023-09-01 03:33:31,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [428797195] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:33:31,462 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:33:31,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2023-09-01 03:33:31,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106002325] [2023-09-01 03:33:31,463 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:33:31,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-09-01 03:33:31,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:33:31,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-09-01 03:33:31,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2023-09-01 03:33:47,939 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 479 [2023-09-01 03:33:47,940 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 167 transitions, 1846 flow. Second operand has 20 states, 20 states have (on average 182.5) internal successors, (3650), 20 states have internal predecessors, (3650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:33:47,940 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:33:47,940 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 479 [2023-09-01 03:33:47,940 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:34:18,940 INFO L130 PetriNetUnfolder]: 77767/113087 cut-off events. [2023-09-01 03:34:18,941 INFO L131 PetriNetUnfolder]: For 1029049/1050995 co-relation queries the response was YES. [2023-09-01 03:34:21,063 INFO L83 FinitePrefix]: Finished finitePrefix Result has 616934 conditions, 113087 events. 77767/113087 cut-off events. For 1029049/1050995 co-relation queries the response was YES. Maximal size of possible extension queue 3006. Compared 847818 event pairs, 43309 based on Foata normal form. 20564/133516 useless extension candidates. Maximal degree in co-relation 616855. Up to 74069 conditions per place. [2023-09-01 03:34:21,582 INFO L137 encePairwiseOnDemand]: 471/479 looper letters, 387 selfloop transitions, 38 changer transitions 0/435 dead transitions. [2023-09-01 03:34:21,582 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 435 transitions, 4382 flow [2023-09-01 03:34:21,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-09-01 03:34:21,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-09-01 03:34:21,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 4588 transitions. [2023-09-01 03:34:21,586 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3990953375086987 [2023-09-01 03:34:21,586 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 4588 transitions. [2023-09-01 03:34:21,586 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 4588 transitions. [2023-09-01 03:34:21,587 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:34:21,587 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 4588 transitions. [2023-09-01 03:34:21,589 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 191.16666666666666) internal successors, (4588), 24 states have internal predecessors, (4588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:34:21,594 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 479.0) internal successors, (11975), 25 states have internal predecessors, (11975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:34:21,594 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 479.0) internal successors, (11975), 25 states have internal predecessors, (11975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:34:21,594 INFO L175 Difference]: Start difference. First operand has 260 places, 167 transitions, 1846 flow. Second operand 24 states and 4588 transitions. [2023-09-01 03:34:21,595 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 435 transitions, 4382 flow [2023-09-01 03:34:29,223 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 435 transitions, 4200 flow, removed 30 selfloop flow, removed 25 redundant places. [2023-09-01 03:34:29,228 INFO L231 Difference]: Finished difference. Result has 260 places, 168 transitions, 1745 flow [2023-09-01 03:34:29,229 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=1622, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=1745, PETRI_PLACES=260, PETRI_TRANSITIONS=168} [2023-09-01 03:34:29,229 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 199 predicate places. [2023-09-01 03:34:29,229 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 168 transitions, 1745 flow [2023-09-01 03:34:29,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 182.5) internal successors, (3650), 20 states have internal predecessors, (3650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:34:29,230 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:34:29,230 INFO L208 CegarLoopForPetriNet]: trace histogram [8, 2, 2, 1, 1, 1, 1, 1] [2023-09-01 03:34:29,244 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 (33)] Forceful destruction successful, exit code 0 [2023-09-01 03:34:29,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:34:29,442 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-09-01 03:34:29,443 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:34:29,443 INFO L85 PathProgramCache]: Analyzing trace with hash -1811749082, now seen corresponding path program 6 times [2023-09-01 03:34:29,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:34:29,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [149369846] [2023-09-01 03:34:29,444 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 03:34:29,444 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:34:29,444 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:34:29,445 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:34:29,448 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 (34)] Waiting until timeout for monitored process [2023-09-01 03:34:29,703 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-09-01 03:34:29,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 03:34:29,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 25 conjunts are in the unsatisfiable core [2023-09-01 03:34:29,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:34:29,830 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-09-01 03:34:29,831 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-09-01 03:34:30,568 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 59 [2023-09-01 03:34:30,573 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 79 treesize of output 75 [2023-09-01 03:34:30,629 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:34:30,629 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:34:30,949 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 03:34:30,949 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 105 treesize of output 70 [2023-09-01 03:34:30,959 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 70 treesize of output 68 [2023-09-01 03:34:33,278 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:34:33,278 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:34:33,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [149369846] [2023-09-01 03:34:33,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [149369846] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:34:33,278 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:34:33,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 26 [2023-09-01 03:34:33,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659001545] [2023-09-01 03:34:33,278 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:34:33,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-09-01 03:34:33,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:34:33,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-09-01 03:34:33,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=617, Unknown=0, NotChecked=0, Total=756 [2023-09-01 03:34:54,971 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 184 out of 479 [2023-09-01 03:34:54,973 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 168 transitions, 1745 flow. Second operand has 28 states, 28 states have (on average 185.21428571428572) internal successors, (5186), 28 states have internal predecessors, (5186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:34:54,973 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:34:54,973 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 184 of 479 [2023-09-01 03:34:54,973 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:35:04,136 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:36:04,350 INFO L130 PetriNetUnfolder]: 72476/105641 cut-off events. [2023-09-01 03:36:04,351 INFO L131 PetriNetUnfolder]: For 1177613/1199603 co-relation queries the response was YES. [2023-09-01 03:36:06,127 INFO L83 FinitePrefix]: Finished finitePrefix Result has 584079 conditions, 105641 events. 72476/105641 cut-off events. For 1177613/1199603 co-relation queries the response was YES. Maximal size of possible extension queue 2591. Compared 799032 event pairs, 22467 based on Foata normal form. 21610/127195 useless extension candidates. Maximal degree in co-relation 584005. Up to 23401 conditions per place. [2023-09-01 03:36:06,724 INFO L137 encePairwiseOnDemand]: 471/479 looper letters, 1159 selfloop transitions, 105 changer transitions 0/1277 dead transitions. [2023-09-01 03:36:06,724 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 1277 transitions, 12919 flow [2023-09-01 03:36:06,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2023-09-01 03:36:06,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2023-09-01 03:36:06,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 13201 transitions. [2023-09-01 03:36:06,748 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41133580531580094 [2023-09-01 03:36:06,748 INFO L72 ComplementDD]: Start complementDD. Operand 67 states and 13201 transitions. [2023-09-01 03:36:06,748 INFO L73 IsDeterministic]: Start isDeterministic. Operand 67 states and 13201 transitions. [2023-09-01 03:36:06,751 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:36:06,751 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 67 states and 13201 transitions. [2023-09-01 03:36:06,760 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 68 states, 67 states have (on average 197.02985074626866) internal successors, (13201), 67 states have internal predecessors, (13201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:36:06,778 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 68 states, 68 states have (on average 479.0) internal successors, (32572), 68 states have internal predecessors, (32572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:36:06,782 INFO L81 ComplementDD]: Finished complementDD. Result has 68 states, 68 states have (on average 479.0) internal successors, (32572), 68 states have internal predecessors, (32572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:36:06,782 INFO L175 Difference]: Start difference. First operand has 260 places, 168 transitions, 1745 flow. Second operand 67 states and 13201 transitions. [2023-09-01 03:36:06,782 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 1277 transitions, 12919 flow [2023-09-01 03:36:18,936 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 1277 transitions, 12677 flow, removed 4 selfloop flow, removed 13 redundant places. [2023-09-01 03:36:18,943 INFO L231 Difference]: Finished difference. Result has 321 places, 217 transitions, 2569 flow [2023-09-01 03:36:18,943 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=1683, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=67, PETRI_FLOW=2569, PETRI_PLACES=321, PETRI_TRANSITIONS=217} [2023-09-01 03:36:18,943 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 260 predicate places. [2023-09-01 03:36:18,944 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 217 transitions, 2569 flow [2023-09-01 03:36:18,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 185.21428571428572) internal successors, (5186), 28 states have internal predecessors, (5186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:36:18,944 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:36:18,944 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1] [2023-09-01 03:36:18,954 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 (34)] Forceful destruction successful, exit code 0 [2023-09-01 03:36:19,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:36:19,154 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-09-01 03:36:19,154 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:36:19,154 INFO L85 PathProgramCache]: Analyzing trace with hash 712900184, now seen corresponding path program 7 times [2023-09-01 03:36:19,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:36:19,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [648531621] [2023-09-01 03:36:19,155 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 03:36:19,155 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:36:19,155 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:36:19,156 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:36:19,158 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 (35)] Waiting until timeout for monitored process [2023-09-01 03:36:19,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:36:19,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 21 conjunts are in the unsatisfiable core [2023-09-01 03:36:19,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:36:19,446 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-09-01 03:36:19,446 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-09-01 03:36:21,515 INFO L321 Elim1Store]: treesize reduction 320, result has 0.3 percent of original size [2023-09-01 03:36:21,516 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 12 new quantified variables, introduced 66 case distinctions, treesize of input 266 treesize of output 159 [2023-09-01 03:36:21,522 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 159 treesize of output 155 [2023-09-01 03:36:21,545 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 03:36:21,545 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 167 treesize of output 167 [2023-09-01 03:36:21,629 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:36:21,629 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:36:21,962 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 03:36:21,962 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 105 treesize of output 70 [2023-09-01 03:36:21,969 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 70 treesize of output 68 [2023-09-01 03:36:22,652 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:36:22,653 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:36:22,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [648531621] [2023-09-01 03:36:22,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [648531621] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:36:22,653 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:36:22,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2023-09-01 03:36:22,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777081828] [2023-09-01 03:36:22,653 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:36:22,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-09-01 03:36:22,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:36:22,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-09-01 03:36:22,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=432, Unknown=0, NotChecked=0, Total=552 [2023-09-01 03:36:39,550 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 479 [2023-09-01 03:36:39,552 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 217 transitions, 2569 flow. Second operand has 24 states, 24 states have (on average 182.41666666666666) internal successors, (4378), 24 states have internal predecessors, (4378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:36:39,552 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:36:39,552 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 479 [2023-09-01 03:36:39,552 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:37:15,134 INFO L130 PetriNetUnfolder]: 74288/108308 cut-off events. [2023-09-01 03:37:15,135 INFO L131 PetriNetUnfolder]: For 1314799/1337376 co-relation queries the response was YES. [2023-09-01 03:37:16,971 INFO L83 FinitePrefix]: Finished finitePrefix Result has 622242 conditions, 108308 events. 74288/108308 cut-off events. For 1314799/1337376 co-relation queries the response was YES. Maximal size of possible extension queue 2741. Compared 821191 event pairs, 31014 based on Foata normal form. 22619/130790 useless extension candidates. Maximal degree in co-relation 622161. Up to 49870 conditions per place. [2023-09-01 03:37:17,567 INFO L137 encePairwiseOnDemand]: 468/479 looper letters, 732 selfloop transitions, 47 changer transitions 0/792 dead transitions. [2023-09-01 03:37:17,568 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 792 transitions, 8559 flow [2023-09-01 03:37:17,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-09-01 03:37:17,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2023-09-01 03:37:17,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 7298 transitions. [2023-09-01 03:37:17,573 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40094495110427425 [2023-09-01 03:37:17,573 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 7298 transitions. [2023-09-01 03:37:17,573 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 7298 transitions. [2023-09-01 03:37:17,574 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:37:17,574 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 7298 transitions. [2023-09-01 03:37:17,578 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 192.05263157894737) internal successors, (7298), 38 states have internal predecessors, (7298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:37:17,586 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 479.0) internal successors, (18681), 39 states have internal predecessors, (18681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:37:17,587 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 479.0) internal successors, (18681), 39 states have internal predecessors, (18681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:37:17,588 INFO L175 Difference]: Start difference. First operand has 321 places, 217 transitions, 2569 flow. Second operand 38 states and 7298 transitions. [2023-09-01 03:37:17,588 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 792 transitions, 8559 flow [2023-09-01 03:37:29,950 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 792 transitions, 8280 flow, removed 31 selfloop flow, removed 34 redundant places. [2023-09-01 03:37:29,955 INFO L231 Difference]: Finished difference. Result has 330 places, 227 transitions, 2503 flow [2023-09-01 03:37:29,955 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=2289, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=2503, PETRI_PLACES=330, PETRI_TRANSITIONS=227} [2023-09-01 03:37:29,956 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 269 predicate places. [2023-09-01 03:37:29,956 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 227 transitions, 2503 flow [2023-09-01 03:37:29,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 182.41666666666666) internal successors, (4378), 24 states have internal predecessors, (4378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:37:29,956 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:37:29,956 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:37:29,967 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 (35)] Forceful destruction successful, exit code 0 [2023-09-01 03:37:30,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:37:30,165 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-09-01 03:37:30,166 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:37:30,166 INFO L85 PathProgramCache]: Analyzing trace with hash 590750260, now seen corresponding path program 6 times [2023-09-01 03:37:30,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:37:30,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1006643427] [2023-09-01 03:37:30,166 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 03:37:30,166 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:37:30,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:37:30,167 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:37:30,169 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 (36)] Waiting until timeout for monitored process [2023-09-01 03:37:30,403 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-09-01 03:37:30,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 03:37:30,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 24 conjunts are in the unsatisfiable core [2023-09-01 03:37:30,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:37:30,492 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-09-01 03:37:30,493 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-09-01 03:37:31,007 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 59 [2023-09-01 03:37:31,010 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 79 treesize of output 75 [2023-09-01 03:37:31,105 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:37:31,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:37:31,422 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 03:37:31,422 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 105 treesize of output 70 [2023-09-01 03:37:31,432 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 70 treesize of output 68 [2023-09-01 03:37:33,717 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:37:33,717 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:37:33,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1006643427] [2023-09-01 03:37:33,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1006643427] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:37:33,717 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:37:33,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 24 [2023-09-01 03:37:33,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968661307] [2023-09-01 03:37:33,717 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:37:33,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-09-01 03:37:33,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:37:33,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-09-01 03:37:33,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=536, Unknown=0, NotChecked=0, Total=650 [2023-09-01 03:37:58,876 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 184 out of 479 [2023-09-01 03:37:58,877 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 227 transitions, 2503 flow. Second operand has 26 states, 26 states have (on average 185.3846153846154) internal successors, (4820), 26 states have internal predecessors, (4820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:37:58,877 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:37:58,877 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 184 of 479 [2023-09-01 03:37:58,877 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:38:07,295 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] Killed by 15