./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/popl20-counter-fun.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-counter-fun.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 00b544e07f34285bd260f481b4b1205a15ed1c83d300c57496244de51f7f3936 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 02:55:22,758 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 02:55:22,760 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 02:55:22,802 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 02:55:22,804 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 02:55:22,807 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 02:55:22,815 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 02:55:22,817 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 02:55:22,819 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 02:55:22,821 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 02:55:22,822 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 02:55:22,822 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 02:55:22,823 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 02:55:22,825 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 02:55:22,826 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 02:55:22,831 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 02:55:22,832 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 02:55:22,832 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 02:55:22,834 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 02:55:22,836 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 02:55:22,838 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 02:55:22,841 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 02:55:22,842 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 02:55:22,843 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 02:55:22,847 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 02:55:22,850 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 02:55:22,851 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 02:55:22,851 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 02:55:22,852 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 02:55:22,853 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 02:55:22,854 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 02:55:22,856 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 02:55:22,857 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 02:55:22,858 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 02:55:22,859 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 02:55:22,859 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 02:55:22,860 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 02:55:22,860 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 02:55:22,860 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 02:55:22,861 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 02:55:22,862 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 02:55:22,863 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-09-01 02:55:22,888 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 02:55:22,888 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 02:55:22,889 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 02:55:22,890 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 02:55:22,890 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 02:55:22,890 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 02:55:22,891 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 02:55:22,891 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 02:55:22,891 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 02:55:22,892 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 02:55:22,892 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 02:55:22,892 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-09-01 02:55:22,893 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 02:55:22,893 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 02:55:22,893 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 02:55:22,893 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-09-01 02:55:22,893 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-09-01 02:55:22,894 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-09-01 02:55:22,894 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 02:55:22,894 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-09-01 02:55:22,894 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 02:55:22,894 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 02:55:22,894 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 02:55:22,895 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 02:55:22,895 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 02:55:22,895 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 02:55:22,895 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 02:55:22,895 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 02:55:22,895 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 02:55:22,896 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 02:55:22,896 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 02:55:22,896 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 02:55:22,896 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 02:55:22,896 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 02:55:22,897 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 00b544e07f34285bd260f481b4b1205a15ed1c83d300c57496244de51f7f3936 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 02:55:23,191 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 02:55:23,211 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 02:55:23,213 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 02:55:23,214 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 02:55:23,214 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 02:55:23,215 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-counter-fun.wvr.c [2023-09-01 02:55:24,316 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 02:55:24,523 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 02:55:24,524 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-counter-fun.wvr.c [2023-09-01 02:55:24,531 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d5846b669/1691a48b0d664377ab91e6715fe979c8/FLAG6716dd075 [2023-09-01 02:55:24,556 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d5846b669/1691a48b0d664377ab91e6715fe979c8 [2023-09-01 02:55:24,558 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 02:55:24,560 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 02:55:24,563 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 02:55:24,563 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 02:55:24,566 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 02:55:24,567 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 02:55:24" (1/1) ... [2023-09-01 02:55:24,568 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@61814de0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:55:24, skipping insertion in model container [2023-09-01 02:55:24,568 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 02:55:24" (1/1) ... [2023-09-01 02:55:24,573 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 02:55:24,594 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 02:55:24,719 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-counter-fun.wvr.c[2681,2694] [2023-09-01 02:55:24,726 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 02:55:24,735 ERROR L324 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2023-09-01 02:55:24,736 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@200754f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:55:24, skipping insertion in model container [2023-09-01 02:55:24,736 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 02:55:24,736 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-09-01 02:55:24,738 INFO L158 Benchmark]: Toolchain (without parser) took 176.94ms. Allocated memory is still 71.3MB. Free memory was 48.6MB in the beginning and 38.8MB in the end (delta: 9.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-09-01 02:55:24,739 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 71.3MB. Free memory was 48.4MB in the beginning and 48.3MB in the end (delta: 83.9kB). There was no memory consumed. Max. memory is 16.1GB. [2023-09-01 02:55:24,739 INFO L158 Benchmark]: CACSL2BoogieTranslator took 173.10ms. Allocated memory is still 71.3MB. Free memory was 48.4MB in the beginning and 38.8MB in the end (delta: 9.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-09-01 02:55:24,741 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 71.3MB. Free memory was 48.4MB in the beginning and 48.3MB in the end (delta: 83.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 173.10ms. Allocated memory is still 71.3MB. Free memory was 48.4MB in the beginning and 38.8MB in the end (delta: 9.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 97]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/popl20-counter-fun.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 00b544e07f34285bd260f481b4b1205a15ed1c83d300c57496244de51f7f3936 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 02:55:26,452 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 02:55:26,454 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 02:55:26,495 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 02:55:26,496 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 02:55:26,499 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 02:55:26,500 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 02:55:26,503 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 02:55:26,506 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 02:55:26,511 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 02:55:26,512 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 02:55:26,514 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 02:55:26,514 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 02:55:26,516 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 02:55:26,517 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 02:55:26,520 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 02:55:26,521 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 02:55:26,522 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 02:55:26,523 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 02:55:26,535 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 02:55:26,536 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 02:55:26,537 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 02:55:26,538 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 02:55:26,539 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 02:55:26,547 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 02:55:26,547 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 02:55:26,547 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 02:55:26,549 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 02:55:26,550 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 02:55:26,550 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 02:55:26,551 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 02:55:26,552 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 02:55:26,554 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 02:55:26,554 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 02:55:26,555 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 02:55:26,555 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 02:55:26,556 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 02:55:26,556 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 02:55:26,556 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 02:55:26,557 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 02:55:26,558 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 02:55:26,559 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-09-01 02:55:26,591 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 02:55:26,591 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 02:55:26,592 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 02:55:26,593 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 02:55:26,594 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 02:55:26,594 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 02:55:26,594 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 02:55:26,595 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 02:55:26,595 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 02:55:26,595 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 02:55:26,596 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 02:55:26,596 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-09-01 02:55:26,596 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 02:55:26,597 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 02:55:26,597 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 02:55:26,597 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-09-01 02:55:26,597 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-09-01 02:55:26,597 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-09-01 02:55:26,598 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 02:55:26,598 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-09-01 02:55:26,598 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-09-01 02:55:26,598 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-09-01 02:55:26,598 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 02:55:26,599 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 02:55:26,599 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 02:55:26,599 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 02:55:26,599 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 02:55:26,600 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 02:55:26,600 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 02:55:26,600 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 02:55:26,600 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-09-01 02:55:26,601 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-09-01 02:55:26,601 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 02:55:26,601 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 02:55:26,601 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 02:55:26,602 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-09-01 02:55:26,602 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 02:55:26,602 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 00b544e07f34285bd260f481b4b1205a15ed1c83d300c57496244de51f7f3936 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 02:55:26,936 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 02:55:26,957 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 02:55:26,959 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 02:55:26,960 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 02:55:26,960 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 02:55:26,962 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-counter-fun.wvr.c [2023-09-01 02:55:28,215 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 02:55:28,424 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 02:55:28,425 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-counter-fun.wvr.c [2023-09-01 02:55:28,435 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b39ad764f/140e7d40798042f391303c0b618295e9/FLAG1fec22d31 [2023-09-01 02:55:28,451 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b39ad764f/140e7d40798042f391303c0b618295e9 [2023-09-01 02:55:28,453 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 02:55:28,454 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 02:55:28,456 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 02:55:28,456 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 02:55:28,458 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 02:55:28,459 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 02:55:28" (1/1) ... [2023-09-01 02:55:28,460 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@79b49769 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:55:28, skipping insertion in model container [2023-09-01 02:55:28,460 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 02:55:28" (1/1) ... [2023-09-01 02:55:28,466 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 02:55:28,485 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 02:55:28,658 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-counter-fun.wvr.c[2681,2694] [2023-09-01 02:55:28,678 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 02:55:28,694 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-09-01 02:55:28,705 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 02:55:28,730 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-counter-fun.wvr.c[2681,2694] [2023-09-01 02:55:28,736 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 02:55:28,747 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 02:55:28,780 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-counter-fun.wvr.c[2681,2694] [2023-09-01 02:55:28,788 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 02:55:28,799 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 02:55:28,801 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 02:55:28,807 INFO L208 MainTranslator]: Completed translation [2023-09-01 02:55:28,807 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:55:28 WrapperNode [2023-09-01 02:55:28,807 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 02:55:28,808 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 02:55:28,808 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 02:55:28,813 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 02:55:28,819 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:55:28" (1/1) ... [2023-09-01 02:55:28,839 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:55:28" (1/1) ... [2023-09-01 02:55:28,891 INFO L138 Inliner]: procedures = 26, calls = 45, calls flagged for inlining = 13, calls inlined = 15, statements flattened = 193 [2023-09-01 02:55:28,892 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 02:55:28,892 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 02:55:28,892 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 02:55:28,893 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 02:55:28,900 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:55:28" (1/1) ... [2023-09-01 02:55:28,901 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:55:28" (1/1) ... [2023-09-01 02:55:28,915 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:55:28" (1/1) ... [2023-09-01 02:55:28,917 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:55:28" (1/1) ... [2023-09-01 02:55:28,928 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:55:28" (1/1) ... [2023-09-01 02:55:28,939 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:55:28" (1/1) ... [2023-09-01 02:55:28,942 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:55:28" (1/1) ... [2023-09-01 02:55:28,946 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:55:28" (1/1) ... [2023-09-01 02:55:28,949 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 02:55:28,951 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 02:55:28,952 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 02:55:28,952 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 02:55:28,953 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:55:28" (1/1) ... [2023-09-01 02:55:28,957 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 02:55:28,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 02:55:28,982 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-09-01 02:55:29,009 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-09-01 02:55:29,024 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 02:55:29,024 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-09-01 02:55:29,024 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 02:55:29,024 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-09-01 02:55:29,024 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-09-01 02:55:29,024 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-09-01 02:55:29,025 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-09-01 02:55:29,025 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-09-01 02:55:29,025 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-09-01 02:55:29,025 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-09-01 02:55:29,025 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-09-01 02:55:29,026 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 02:55:29,026 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 02:55:29,026 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 02:55:29,026 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-09-01 02:55:29,027 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-09-01 02:55:29,127 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 02:55:29,128 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 02:55:29,757 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 02:55:30,057 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 02:55:30,057 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-09-01 02:55:30,059 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 02:55:30 BoogieIcfgContainer [2023-09-01 02:55:30,059 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 02:55:30,063 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 02:55:30,063 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 02:55:30,066 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 02:55:30,066 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 02:55:28" (1/3) ... [2023-09-01 02:55:30,067 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ca6502b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 02:55:30, skipping insertion in model container [2023-09-01 02:55:30,067 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:55:28" (2/3) ... [2023-09-01 02:55:30,067 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ca6502b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 02:55:30, skipping insertion in model container [2023-09-01 02:55:30,067 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 02:55:30" (3/3) ... [2023-09-01 02:55:30,069 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-counter-fun.wvr.c [2023-09-01 02:55:30,083 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 02:55:30,084 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 34 error locations. [2023-09-01 02:55:30,084 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 02:55:30,220 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-09-01 02:55:30,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 180 places, 186 transitions, 388 flow [2023-09-01 02:55:30,354 INFO L130 PetriNetUnfolder]: 13/184 cut-off events. [2023-09-01 02:55:30,354 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 02:55:30,359 INFO L83 FinitePrefix]: Finished finitePrefix Result has 193 conditions, 184 events. 13/184 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 266 event pairs, 0 based on Foata normal form. 0/137 useless extension candidates. Maximal degree in co-relation 134. Up to 2 conditions per place. [2023-09-01 02:55:30,359 INFO L82 GeneralOperation]: Start removeDead. Operand has 180 places, 186 transitions, 388 flow [2023-09-01 02:55:30,366 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 174 places, 180 transitions, 372 flow [2023-09-01 02:55:30,370 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 02:55:30,383 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 174 places, 180 transitions, 372 flow [2023-09-01 02:55:30,387 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 174 places, 180 transitions, 372 flow [2023-09-01 02:55:30,388 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 174 places, 180 transitions, 372 flow [2023-09-01 02:55:30,436 INFO L130 PetriNetUnfolder]: 13/180 cut-off events. [2023-09-01 02:55:30,436 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 02:55:30,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 189 conditions, 180 events. 13/180 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 270 event pairs, 0 based on Foata normal form. 0/134 useless extension candidates. Maximal degree in co-relation 134. Up to 2 conditions per place. [2023-09-01 02:55:30,440 INFO L119 LiptonReduction]: Number of co-enabled transitions 1720 [2023-09-01 02:55:48,892 INFO L134 LiptonReduction]: Checked pairs total: 2314 [2023-09-01 02:55:48,893 INFO L136 LiptonReduction]: Total number of compositions: 191 [2023-09-01 02:55:48,905 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-09-01 02:55:48,910 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;@73cd5c36, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 02:55:48,910 INFO L358 AbstractCegarLoop]: Starting to check reachability of 56 error locations. [2023-09-01 02:55:48,912 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-09-01 02:55:48,912 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 02:55:48,912 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:55:48,913 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-09-01 02:55:48,913 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2023-09-01 02:55:48,917 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:55:48,917 INFO L85 PathProgramCache]: Analyzing trace with hash 28743, now seen corresponding path program 1 times [2023-09-01 02:55:48,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:55:48,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1266408642] [2023-09-01 02:55:48,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:55:48,927 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:55:48,928 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:55:48,941 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 02:55:48,947 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-09-01 02:55:49,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:55:49,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 9 conjunts are in the unsatisfiable core [2023-09-01 02:55:49,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:55:49,195 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-09-01 02:55:49,196 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-09-01 02:55:49,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:55:49,240 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 02:55:49,240 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:55:49,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1266408642] [2023-09-01 02:55:49,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1266408642] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:55:49,241 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:55:49,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 02:55:49,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784818996] [2023-09-01 02:55:49,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:55:49,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 02:55:49,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:55:49,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 02:55:49,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 02:55:49,424 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 377 [2023-09-01 02:55:49,427 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 52 transitions, 116 flow. Second operand has 3 states, 3 states have (on average 140.66666666666666) internal successors, (422), 3 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:55:49,427 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:55:49,427 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 377 [2023-09-01 02:55:49,428 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:55:49,969 INFO L130 PetriNetUnfolder]: 1305/1829 cut-off events. [2023-09-01 02:55:49,969 INFO L131 PetriNetUnfolder]: For 22/22 co-relation queries the response was YES. [2023-09-01 02:55:49,971 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3695 conditions, 1829 events. 1305/1829 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 8988 event pairs, 615 based on Foata normal form. 0/400 useless extension candidates. Maximal degree in co-relation 1673. Up to 913 conditions per place. [2023-09-01 02:55:49,981 INFO L137 encePairwiseOnDemand]: 358/377 looper letters, 67 selfloop transitions, 4 changer transitions 0/73 dead transitions. [2023-09-01 02:55:49,982 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 73 transitions, 312 flow [2023-09-01 02:55:49,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 02:55:49,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 02:55:49,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 519 transitions. [2023-09-01 02:55:49,994 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4588859416445623 [2023-09-01 02:55:49,995 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 519 transitions. [2023-09-01 02:55:49,995 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 519 transitions. [2023-09-01 02:55:49,997 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:55:49,998 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 519 transitions. [2023-09-01 02:55:50,001 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 173.0) internal successors, (519), 3 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:55:50,006 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 377.0) internal successors, (1508), 4 states have internal predecessors, (1508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:55:50,007 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 377.0) internal successors, (1508), 4 states have internal predecessors, (1508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:55:50,009 INFO L175 Difference]: Start difference. First operand has 55 places, 52 transitions, 116 flow. Second operand 3 states and 519 transitions. [2023-09-01 02:55:50,009 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 73 transitions, 312 flow [2023-09-01 02:55:50,014 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 73 transitions, 296 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-09-01 02:55:50,016 INFO L231 Difference]: Finished difference. Result has 42 places, 42 transitions, 114 flow [2023-09-01 02:55:50,018 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=377, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=114, PETRI_PLACES=42, PETRI_TRANSITIONS=42} [2023-09-01 02:55:50,020 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -13 predicate places. [2023-09-01 02:55:50,021 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 42 transitions, 114 flow [2023-09-01 02:55:50,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 140.66666666666666) internal successors, (422), 3 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:55:50,021 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:55:50,021 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-09-01 02:55:50,036 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 02:55:50,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:55:50,232 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2023-09-01 02:55:50,232 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:55:50,232 INFO L85 PathProgramCache]: Analyzing trace with hash 28742, now seen corresponding path program 1 times [2023-09-01 02:55:50,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:55:50,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [442253068] [2023-09-01 02:55:50,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:55:50,233 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 02:55:50,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:55:50,235 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 02:55:50,237 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-09-01 02:55:50,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:55:50,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 3 conjunts are in the unsatisfiable core [2023-09-01 02:55:50,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:55:50,346 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-09-01 02:55:50,347 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2023-09-01 02:55:50,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:55:50,381 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 02:55:50,381 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:55:50,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [442253068] [2023-09-01 02:55:50,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [442253068] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:55:50,382 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:55:50,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 02:55:50,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228814785] [2023-09-01 02:55:50,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:55:50,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 02:55:50,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:55:50,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 02:55:50,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 02:55:50,482 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 377 [2023-09-01 02:55:50,483 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 42 transitions, 114 flow. Second operand has 3 states, 3 states have (on average 140.66666666666666) internal successors, (422), 3 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:55:50,483 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:55:50,483 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 377 [2023-09-01 02:55:50,483 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:55:50,858 INFO L130 PetriNetUnfolder]: 1319/1839 cut-off events. [2023-09-01 02:55:50,859 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 02:55:50,860 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3697 conditions, 1839 events. 1319/1839 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 9050 event pairs, 618 based on Foata normal form. 2/405 useless extension candidates. Maximal degree in co-relation 1837. Up to 1825 conditions per place. [2023-09-01 02:55:50,868 INFO L137 encePairwiseOnDemand]: 374/377 looper letters, 37 selfloop transitions, 1 changer transitions 0/40 dead transitions. [2023-09-01 02:55:50,869 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 40 transitions, 186 flow [2023-09-01 02:55:50,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 02:55:50,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 02:55:50,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 457 transitions. [2023-09-01 02:55:50,871 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40406719717064543 [2023-09-01 02:55:50,871 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 457 transitions. [2023-09-01 02:55:50,871 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 457 transitions. [2023-09-01 02:55:50,872 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:55:50,872 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 457 transitions. [2023-09-01 02:55:50,873 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 152.33333333333334) internal successors, (457), 3 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:55:50,882 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 377.0) internal successors, (1508), 4 states have internal predecessors, (1508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:55:50,883 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 377.0) internal successors, (1508), 4 states have internal predecessors, (1508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:55:50,883 INFO L175 Difference]: Start difference. First operand has 42 places, 42 transitions, 114 flow. Second operand 3 states and 457 transitions. [2023-09-01 02:55:50,883 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 40 transitions, 186 flow [2023-09-01 02:55:50,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 40 transitions, 178 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 02:55:50,885 INFO L231 Difference]: Finished difference. Result has 40 places, 40 transitions, 104 flow [2023-09-01 02:55:50,885 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=377, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=104, PETRI_PLACES=40, PETRI_TRANSITIONS=40} [2023-09-01 02:55:50,886 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -15 predicate places. [2023-09-01 02:55:50,886 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 40 transitions, 104 flow [2023-09-01 02:55:50,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 140.66666666666666) internal successors, (422), 3 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:55:50,887 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:55:50,887 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-09-01 02:55:50,899 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 02:55:51,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:55:51,096 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2023-09-01 02:55:51,096 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:55:51,096 INFO L85 PathProgramCache]: Analyzing trace with hash 892651, now seen corresponding path program 1 times [2023-09-01 02:55:51,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:55:51,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1401057799] [2023-09-01 02:55:51,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:55:51,097 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:55:51,098 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:55:51,098 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 02:55:51,104 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-09-01 02:55:51,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:55:51,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 11 conjunts are in the unsatisfiable core [2023-09-01 02:55:51,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:55:51,259 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-09-01 02:55:51,259 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-09-01 02:55:51,320 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:55:51,320 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:55:51,503 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:55:51,503 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:55:51,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1401057799] [2023-09-01 02:55:51,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1401057799] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:55:51,504 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 02:55:51,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-09-01 02:55:51,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141618683] [2023-09-01 02:55:51,504 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 02:55:51,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-09-01 02:55:51,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:55:51,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-09-01 02:55:51,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-09-01 02:55:52,209 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 377 [2023-09-01 02:55:52,210 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 40 transitions, 104 flow. Second operand has 6 states, 6 states have (on average 131.0) internal successors, (786), 6 states have internal predecessors, (786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:55:52,211 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:55:52,211 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 377 [2023-09-01 02:55:52,211 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:55:53,549 INFO L130 PetriNetUnfolder]: 1958/2741 cut-off events. [2023-09-01 02:55:53,549 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-09-01 02:55:53,552 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5506 conditions, 2741 events. 1958/2741 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 14067 event pairs, 921 based on Foata normal form. 0/609 useless extension candidates. Maximal degree in co-relation 5498. Up to 914 conditions per place. [2023-09-01 02:55:53,563 INFO L137 encePairwiseOnDemand]: 368/377 looper letters, 92 selfloop transitions, 19 changer transitions 0/113 dead transitions. [2023-09-01 02:55:53,563 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 113 transitions, 498 flow [2023-09-01 02:55:53,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 02:55:53,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 02:55:53,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 897 transitions. [2023-09-01 02:55:53,566 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39655172413793105 [2023-09-01 02:55:53,566 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 897 transitions. [2023-09-01 02:55:53,567 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 897 transitions. [2023-09-01 02:55:53,567 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:55:53,567 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 897 transitions. [2023-09-01 02:55:53,569 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 149.5) internal successors, (897), 6 states have internal predecessors, (897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:55:53,573 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 377.0) internal successors, (2639), 7 states have internal predecessors, (2639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:55:53,574 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 377.0) internal successors, (2639), 7 states have internal predecessors, (2639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:55:53,574 INFO L175 Difference]: Start difference. First operand has 40 places, 40 transitions, 104 flow. Second operand 6 states and 897 transitions. [2023-09-01 02:55:53,575 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 113 transitions, 498 flow [2023-09-01 02:55:53,579 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 113 transitions, 497 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 02:55:53,581 INFO L231 Difference]: Finished difference. Result has 48 places, 55 transitions, 248 flow [2023-09-01 02:55:53,581 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=377, PETRI_DIFFERENCE_MINUEND_FLOW=103, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=248, PETRI_PLACES=48, PETRI_TRANSITIONS=55} [2023-09-01 02:55:53,582 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -7 predicate places. [2023-09-01 02:55:53,583 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 55 transitions, 248 flow [2023-09-01 02:55:53,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 131.0) internal successors, (786), 6 states have internal predecessors, (786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:55:53,583 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:55:53,584 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-09-01 02:55:53,592 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2023-09-01 02:55:53,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:55:53,793 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2023-09-01 02:55:53,793 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:55:53,793 INFO L85 PathProgramCache]: Analyzing trace with hash 893626, now seen corresponding path program 1 times [2023-09-01 02:55:53,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:55:53,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [26011206] [2023-09-01 02:55:53,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:55:53,794 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:55:53,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:55:53,797 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 02:55:53,799 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-09-01 02:55:53,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:55:53,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 12 conjunts are in the unsatisfiable core [2023-09-01 02:55:53,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:55:53,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:55:53,953 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2023-09-01 02:55:53,953 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 33 [2023-09-01 02:55:54,010 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-09-01 02:55:54,011 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 1 case distinctions, treesize of input 14 treesize of output 20 [2023-09-01 02:55:54,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:55:54,020 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 02:55:54,020 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:55:54,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [26011206] [2023-09-01 02:55:54,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [26011206] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:55:54,021 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:55:54,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 02:55:54,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088806568] [2023-09-01 02:55:54,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:55:54,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 02:55:54,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:55:54,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 02:55:54,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 02:55:54,127 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 377 [2023-09-01 02:55:54,128 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 55 transitions, 248 flow. Second operand has 3 states, 3 states have (on average 144.0) internal successors, (432), 3 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:55:54,128 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:55:54,128 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 377 [2023-09-01 02:55:54,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:55:54,572 INFO L130 PetriNetUnfolder]: 1498/2131 cut-off events. [2023-09-01 02:55:54,573 INFO L131 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2023-09-01 02:55:54,575 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4343 conditions, 2131 events. 1498/2131 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 301. Compared 11004 event pairs, 693 based on Foata normal form. 0/529 useless extension candidates. Maximal degree in co-relation 4330. Up to 2110 conditions per place. [2023-09-01 02:55:54,583 INFO L137 encePairwiseOnDemand]: 374/377 looper letters, 48 selfloop transitions, 1 changer transitions 0/51 dead transitions. [2023-09-01 02:55:54,583 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 51 transitions, 326 flow [2023-09-01 02:55:54,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 02:55:54,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 02:55:54,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 464 transitions. [2023-09-01 02:55:54,586 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41025641025641024 [2023-09-01 02:55:54,586 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 464 transitions. [2023-09-01 02:55:54,586 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 464 transitions. [2023-09-01 02:55:54,586 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:55:54,586 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 464 transitions. [2023-09-01 02:55:54,587 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 154.66666666666666) internal successors, (464), 3 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:55:54,590 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 377.0) internal successors, (1508), 4 states have internal predecessors, (1508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:55:54,590 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 377.0) internal successors, (1508), 4 states have internal predecessors, (1508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:55:54,590 INFO L175 Difference]: Start difference. First operand has 48 places, 55 transitions, 248 flow. Second operand 3 states and 464 transitions. [2023-09-01 02:55:54,591 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 51 transitions, 326 flow [2023-09-01 02:55:54,595 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 51 transitions, 307 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-09-01 02:55:54,596 INFO L231 Difference]: Finished difference. Result has 47 places, 51 transitions, 211 flow [2023-09-01 02:55:54,596 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=377, PETRI_DIFFERENCE_MINUEND_FLOW=209, PETRI_DIFFERENCE_MINUEND_PLACES=45, 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=211, PETRI_PLACES=47, PETRI_TRANSITIONS=51} [2023-09-01 02:55:54,598 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -8 predicate places. [2023-09-01 02:55:54,598 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 51 transitions, 211 flow [2023-09-01 02:55:54,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 144.0) internal successors, (432), 3 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:55:54,599 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:55:54,599 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-09-01 02:55:54,609 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2023-09-01 02:55:54,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:55:54,807 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2023-09-01 02:55:54,808 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:55:54,808 INFO L85 PathProgramCache]: Analyzing trace with hash 893624, now seen corresponding path program 1 times [2023-09-01 02:55:54,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:55:54,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1507976439] [2023-09-01 02:55:54,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:55:54,809 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:55:54,809 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:55:54,810 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 02:55:54,813 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2023-09-01 02:55:54,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:55:54,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 11 conjunts are in the unsatisfiable core [2023-09-01 02:55:54,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:55:54,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:55:54,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:55:54,942 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-09-01 02:55:54,944 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 1 case distinctions, treesize of input 12 treesize of output 20 [2023-09-01 02:55:54,966 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-09-01 02:55:55,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:55:55,029 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-09-01 02:55:55,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:55:55,052 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 02:55:55,053 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:55:55,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1507976439] [2023-09-01 02:55:55,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1507976439] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:55:55,053 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:55:55,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 02:55:55,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763787409] [2023-09-01 02:55:55,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:55:55,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 02:55:55,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:55:55,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 02:55:55,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-09-01 02:55:55,188 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 377 [2023-09-01 02:55:55,189 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 51 transitions, 211 flow. Second operand has 4 states, 4 states have (on average 143.75) internal successors, (575), 4 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:55:55,189 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:55:55,189 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 377 [2023-09-01 02:55:55,189 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:55:55,519 INFO L130 PetriNetUnfolder]: 1010/1493 cut-off events. [2023-09-01 02:55:55,520 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2023-09-01 02:55:55,522 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3048 conditions, 1493 events. 1010/1493 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 7698 event pairs, 459 based on Foata normal form. 0/445 useless extension candidates. Maximal degree in co-relation 3034. Up to 1472 conditions per place. [2023-09-01 02:55:55,527 INFO L137 encePairwiseOnDemand]: 374/377 looper letters, 44 selfloop transitions, 1 changer transitions 0/47 dead transitions. [2023-09-01 02:55:55,528 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 47 transitions, 281 flow [2023-09-01 02:55:55,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 02:55:55,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 02:55:55,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 462 transitions. [2023-09-01 02:55:55,530 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40848806366047746 [2023-09-01 02:55:55,530 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 462 transitions. [2023-09-01 02:55:55,530 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 462 transitions. [2023-09-01 02:55:55,530 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:55:55,530 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 462 transitions. [2023-09-01 02:55:55,532 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 154.0) internal successors, (462), 3 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:55:55,534 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 377.0) internal successors, (1508), 4 states have internal predecessors, (1508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:55:55,535 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 377.0) internal successors, (1508), 4 states have internal predecessors, (1508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:55:55,535 INFO L175 Difference]: Start difference. First operand has 47 places, 51 transitions, 211 flow. Second operand 3 states and 462 transitions. [2023-09-01 02:55:55,536 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 47 transitions, 281 flow [2023-09-01 02:55:55,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 47 transitions, 280 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 02:55:55,538 INFO L231 Difference]: Finished difference. Result has 46 places, 47 transitions, 192 flow [2023-09-01 02:55:55,538 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=377, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=44, 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=192, PETRI_PLACES=46, PETRI_TRANSITIONS=47} [2023-09-01 02:55:55,540 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -9 predicate places. [2023-09-01 02:55:55,540 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 47 transitions, 192 flow [2023-09-01 02:55:55,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 143.75) internal successors, (575), 4 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:55:55,540 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:55:55,540 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-09-01 02:55:55,555 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2023-09-01 02:55:55,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:55:55,751 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2023-09-01 02:55:55,751 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:55:55,752 INFO L85 PathProgramCache]: Analyzing trace with hash 858795452, now seen corresponding path program 1 times [2023-09-01 02:55:55,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:55:55,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1503836711] [2023-09-01 02:55:55,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:55:55,752 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:55:55,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:55:55,753 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 02:55:55,755 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2023-09-01 02:55:55,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:55:55,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 10 conjunts are in the unsatisfiable core [2023-09-01 02:55:55,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:55:55,858 INFO L321 Elim1Store]: treesize reduction 50, result has 23.1 percent of original size [2023-09-01 02:55:55,859 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 2 case distinctions, treesize of input 26 treesize of output 33 [2023-09-01 02:55:55,887 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-09-01 02:55:55,888 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 1 case distinctions, treesize of input 14 treesize of output 20 [2023-09-01 02:55:55,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:55:55,901 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 02:55:55,902 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:55:55,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1503836711] [2023-09-01 02:55:55,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1503836711] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:55:55,902 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:55:55,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 02:55:55,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521258814] [2023-09-01 02:55:55,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:55:55,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 02:55:55,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:55:55,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 02:55:55,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 02:55:55,976 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 377 [2023-09-01 02:55:55,977 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 47 transitions, 192 flow. Second operand has 3 states, 3 states have (on average 142.66666666666666) internal successors, (428), 3 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:55:55,977 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:55:55,977 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 377 [2023-09-01 02:55:55,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:55:56,248 INFO L130 PetriNetUnfolder]: 941/1382 cut-off events. [2023-09-01 02:55:56,248 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2023-09-01 02:55:56,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2827 conditions, 1382 events. 941/1382 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 6927 event pairs, 426 based on Foata normal form. 0/436 useless extension candidates. Maximal degree in co-relation 2812. Up to 1361 conditions per place. [2023-09-01 02:55:56,260 INFO L137 encePairwiseOnDemand]: 374/377 looper letters, 42 selfloop transitions, 1 changer transitions 0/45 dead transitions. [2023-09-01 02:55:56,260 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 45 transitions, 274 flow [2023-09-01 02:55:56,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 02:55:56,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 02:55:56,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 454 transitions. [2023-09-01 02:55:56,262 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40141467727674623 [2023-09-01 02:55:56,262 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 454 transitions. [2023-09-01 02:55:56,262 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 454 transitions. [2023-09-01 02:55:56,262 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:55:56,262 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 454 transitions. [2023-09-01 02:55:56,263 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 151.33333333333334) internal successors, (454), 3 states have internal predecessors, (454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:55:56,265 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 377.0) internal successors, (1508), 4 states have internal predecessors, (1508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:55:56,266 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 377.0) internal successors, (1508), 4 states have internal predecessors, (1508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:55:56,266 INFO L175 Difference]: Start difference. First operand has 46 places, 47 transitions, 192 flow. Second operand 3 states and 454 transitions. [2023-09-01 02:55:56,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 45 transitions, 274 flow [2023-09-01 02:55:56,267 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 45 transitions, 273 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 02:55:56,269 INFO L231 Difference]: Finished difference. Result has 45 places, 45 transitions, 189 flow [2023-09-01 02:55:56,269 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=377, PETRI_DIFFERENCE_MINUEND_FLOW=187, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=189, PETRI_PLACES=45, PETRI_TRANSITIONS=45} [2023-09-01 02:55:56,271 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -10 predicate places. [2023-09-01 02:55:56,273 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 45 transitions, 189 flow [2023-09-01 02:55:56,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 142.66666666666666) internal successors, (428), 3 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:55:56,273 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:55:56,274 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-09-01 02:55:56,282 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2023-09-01 02:55:56,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:55:56,482 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2023-09-01 02:55:56,483 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:55:56,483 INFO L85 PathProgramCache]: Analyzing trace with hash 858795453, now seen corresponding path program 1 times [2023-09-01 02:55:56,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:55:56,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [15323685] [2023-09-01 02:55:56,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:55:56,483 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:55:56,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:55:56,484 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 02:55:56,486 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2023-09-01 02:55:56,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:55:56,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 12 conjunts are in the unsatisfiable core [2023-09-01 02:55:56,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:55:56,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:55:56,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:55:56,602 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-09-01 02:55:56,602 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 1 case distinctions, treesize of input 12 treesize of output 20 [2023-09-01 02:55:56,609 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 02:55:56,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:55:56,639 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-09-01 02:55:56,686 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:55:56,687 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 02:55:56,687 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:55:56,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [15323685] [2023-09-01 02:55:56,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [15323685] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:55:56,687 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:55:56,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 02:55:56,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158191804] [2023-09-01 02:55:56,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:55:56,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 02:55:56,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:55:56,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 02:55:56,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 02:55:56,829 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 377 [2023-09-01 02:55:56,830 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 45 transitions, 189 flow. Second operand has 4 states, 4 states have (on average 142.25) internal successors, (569), 4 states have internal predecessors, (569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:55:56,830 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:55:56,830 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 377 [2023-09-01 02:55:56,830 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:55:57,125 INFO L130 PetriNetUnfolder]: 872/1271 cut-off events. [2023-09-01 02:55:57,125 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2023-09-01 02:55:57,127 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2606 conditions, 1271 events. 872/1271 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 6209 event pairs, 393 based on Foata normal form. 0/427 useless extension candidates. Maximal degree in co-relation 2590. Up to 1250 conditions per place. [2023-09-01 02:55:57,131 INFO L137 encePairwiseOnDemand]: 374/377 looper letters, 40 selfloop transitions, 1 changer transitions 0/43 dead transitions. [2023-09-01 02:55:57,131 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 43 transitions, 267 flow [2023-09-01 02:55:57,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 02:55:57,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 02:55:57,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 452 transitions. [2023-09-01 02:55:57,134 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39964633068081346 [2023-09-01 02:55:57,134 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 452 transitions. [2023-09-01 02:55:57,134 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 452 transitions. [2023-09-01 02:55:57,134 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:55:57,134 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 452 transitions. [2023-09-01 02:55:57,135 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 150.66666666666666) internal successors, (452), 3 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:55:57,137 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 377.0) internal successors, (1508), 4 states have internal predecessors, (1508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:55:57,138 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 377.0) internal successors, (1508), 4 states have internal predecessors, (1508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:55:57,138 INFO L175 Difference]: Start difference. First operand has 45 places, 45 transitions, 189 flow. Second operand 3 states and 452 transitions. [2023-09-01 02:55:57,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 43 transitions, 267 flow [2023-09-01 02:55:57,139 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 43 transitions, 266 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 02:55:57,139 INFO L231 Difference]: Finished difference. Result has 44 places, 43 transitions, 186 flow [2023-09-01 02:55:57,140 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=377, PETRI_DIFFERENCE_MINUEND_FLOW=184, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=186, PETRI_PLACES=44, PETRI_TRANSITIONS=43} [2023-09-01 02:55:57,140 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -11 predicate places. [2023-09-01 02:55:57,140 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 43 transitions, 186 flow [2023-09-01 02:55:57,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 142.25) internal successors, (569), 4 states have internal predecessors, (569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:55:57,141 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:55:57,141 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-09-01 02:55:57,150 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2023-09-01 02:55:57,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:55:57,350 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2023-09-01 02:55:57,350 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:55:57,351 INFO L85 PathProgramCache]: Analyzing trace with hash 852849607, now seen corresponding path program 1 times [2023-09-01 02:55:57,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:55:57,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1615788014] [2023-09-01 02:55:57,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:55:57,351 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:55:57,351 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:55:57,352 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 02:55:57,354 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2023-09-01 02:55:57,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:55:57,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2023-09-01 02:55:57,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:55:57,510 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:55:57,510 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 02:55:57,510 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:55:57,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1615788014] [2023-09-01 02:55:57,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1615788014] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:55:57,511 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:55:57,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 02:55:57,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101451849] [2023-09-01 02:55:57,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:55:57,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 02:55:57,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:55:57,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 02:55:57,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 02:55:57,590 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 377 [2023-09-01 02:55:57,590 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 43 transitions, 186 flow. Second operand has 4 states, 4 states have (on average 141.25) internal successors, (565), 4 states have internal predecessors, (565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:55:57,590 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:55:57,590 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 377 [2023-09-01 02:55:57,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:55:57,947 INFO L130 PetriNetUnfolder]: 901/1405 cut-off events. [2023-09-01 02:55:57,947 INFO L131 PetriNetUnfolder]: For 18/18 co-relation queries the response was YES. [2023-09-01 02:55:57,949 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2896 conditions, 1405 events. 901/1405 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 7593 event pairs, 453 based on Foata normal form. 3/558 useless extension candidates. Maximal degree in co-relation 2879. Up to 1210 conditions per place. [2023-09-01 02:55:57,954 INFO L137 encePairwiseOnDemand]: 365/377 looper letters, 56 selfloop transitions, 3 changer transitions 2/63 dead transitions. [2023-09-01 02:55:57,954 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 63 transitions, 392 flow [2023-09-01 02:55:57,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 02:55:57,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 02:55:57,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 612 transitions. [2023-09-01 02:55:57,956 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40583554376657827 [2023-09-01 02:55:57,956 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 612 transitions. [2023-09-01 02:55:57,957 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 612 transitions. [2023-09-01 02:55:57,957 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:55:57,957 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 612 transitions. [2023-09-01 02:55:57,958 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 153.0) internal successors, (612), 4 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:55:57,960 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 377.0) internal successors, (1885), 5 states have internal predecessors, (1885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:55:57,961 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 377.0) internal successors, (1885), 5 states have internal predecessors, (1885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:55:57,961 INFO L175 Difference]: Start difference. First operand has 44 places, 43 transitions, 186 flow. Second operand 4 states and 612 transitions. [2023-09-01 02:55:57,961 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 63 transitions, 392 flow [2023-09-01 02:55:57,962 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 63 transitions, 391 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 02:55:57,962 INFO L231 Difference]: Finished difference. Result has 47 places, 43 transitions, 210 flow [2023-09-01 02:55:57,963 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=377, PETRI_DIFFERENCE_MINUEND_FLOW=185, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=210, PETRI_PLACES=47, PETRI_TRANSITIONS=43} [2023-09-01 02:55:57,964 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -8 predicate places. [2023-09-01 02:55:57,964 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 43 transitions, 210 flow [2023-09-01 02:55:57,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 141.25) internal successors, (565), 4 states have internal predecessors, (565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:55:57,968 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:55:57,968 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-09-01 02:55:57,986 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2023-09-01 02:55:58,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:55:58,179 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2023-09-01 02:55:58,180 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:55:58,180 INFO L85 PathProgramCache]: Analyzing trace with hash 824768839, now seen corresponding path program 2 times [2023-09-01 02:55:58,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:55:58,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [805210860] [2023-09-01 02:55:58,180 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 02:55:58,180 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:55:58,180 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:55:58,184 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 02:55:58,185 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2023-09-01 02:55:58,254 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 02:55:58,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 02:55:58,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 13 conjunts are in the unsatisfiable core [2023-09-01 02:55:58,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:55:58,315 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-09-01 02:55:58,315 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-09-01 02:55:58,437 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 02:55:58,437 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:55:58,852 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:55:58,852 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:55:58,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [805210860] [2023-09-01 02:55:58,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [805210860] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:55:58,852 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 02:55:58,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-09-01 02:55:58,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477637736] [2023-09-01 02:55:58,853 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 02:55:58,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 02:55:58,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:55:58,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 02:55:58,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-09-01 02:56:01,266 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 377 [2023-09-01 02:56:01,267 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 43 transitions, 210 flow. Second operand has 12 states, 12 states have (on average 133.0) internal successors, (1596), 12 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:56:01,267 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:56:01,267 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 377 [2023-09-01 02:56:01,267 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:56:04,278 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.45s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 02:56:05,609 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 02:56:07,089 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.48s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 02:56:09,373 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 02:56:10,796 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 02:56:15,524 INFO L130 PetriNetUnfolder]: 3104/4760 cut-off events. [2023-09-01 02:56:15,525 INFO L131 PetriNetUnfolder]: For 359/359 co-relation queries the response was YES. [2023-09-01 02:56:15,530 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11982 conditions, 4760 events. 3104/4760 cut-off events. For 359/359 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 29063 event pairs, 1520 based on Foata normal form. 18/2408 useless extension candidates. Maximal degree in co-relation 11963. Up to 2291 conditions per place. [2023-09-01 02:56:15,544 INFO L137 encePairwiseOnDemand]: 370/377 looper letters, 215 selfloop transitions, 32 changer transitions 0/249 dead transitions. [2023-09-01 02:56:15,544 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 249 transitions, 1418 flow [2023-09-01 02:56:15,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-09-01 02:56:15,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-09-01 02:56:15,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1843 transitions. [2023-09-01 02:56:15,550 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40738284703801947 [2023-09-01 02:56:15,550 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1843 transitions. [2023-09-01 02:56:15,550 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1843 transitions. [2023-09-01 02:56:15,551 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:56:15,551 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1843 transitions. [2023-09-01 02:56:15,554 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 153.58333333333334) internal successors, (1843), 12 states have internal predecessors, (1843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:56:15,559 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 377.0) internal successors, (4901), 13 states have internal predecessors, (4901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:56:15,560 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 377.0) internal successors, (4901), 13 states have internal predecessors, (4901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:56:15,560 INFO L175 Difference]: Start difference. First operand has 47 places, 43 transitions, 210 flow. Second operand 12 states and 1843 transitions. [2023-09-01 02:56:15,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 249 transitions, 1418 flow [2023-09-01 02:56:15,562 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 249 transitions, 1412 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-09-01 02:56:15,564 INFO L231 Difference]: Finished difference. Result has 64 places, 62 transitions, 448 flow [2023-09-01 02:56:15,565 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=377, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=448, PETRI_PLACES=64, PETRI_TRANSITIONS=62} [2023-09-01 02:56:15,565 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 9 predicate places. [2023-09-01 02:56:15,565 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 62 transitions, 448 flow [2023-09-01 02:56:15,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 133.0) internal successors, (1596), 12 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:56:15,566 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:56:15,566 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:56:15,572 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 02:56:15,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:56:15,766 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2023-09-01 02:56:15,767 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:56:15,767 INFO L85 PathProgramCache]: Analyzing trace with hash -173887378, now seen corresponding path program 1 times [2023-09-01 02:56:15,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:56:15,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [388211862] [2023-09-01 02:56:15,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:56:15,767 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:56:15,767 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:56:15,768 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 02:56:15,769 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2023-09-01 02:56:15,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:56:15,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 02:56:15,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:56:15,887 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-09-01 02:56:15,888 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2023-09-01 02:56:15,911 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-09-01 02:56:15,911 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 1 case distinctions, treesize of input 14 treesize of output 20 [2023-09-01 02:56:15,927 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 02:56:15,927 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 02:56:15,927 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:56:15,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [388211862] [2023-09-01 02:56:15,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [388211862] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:56:15,927 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:56:15,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 02:56:15,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822281299] [2023-09-01 02:56:15,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:56:15,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 02:56:15,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:56:15,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 02:56:15,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 02:56:16,051 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 377 [2023-09-01 02:56:16,051 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 62 transitions, 448 flow. Second operand has 4 states, 4 states have (on average 139.5) internal successors, (558), 4 states have internal predecessors, (558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:56:16,051 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:56:16,051 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 377 [2023-09-01 02:56:16,052 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:56:16,557 INFO L130 PetriNetUnfolder]: 2324/3680 cut-off events. [2023-09-01 02:56:16,557 INFO L131 PetriNetUnfolder]: For 372/372 co-relation queries the response was YES. [2023-09-01 02:56:16,562 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9149 conditions, 3680 events. 2324/3680 cut-off events. For 372/372 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 22391 event pairs, 1150 based on Foata normal form. 0/2059 useless extension candidates. Maximal degree in co-relation 9122. Up to 3577 conditions per place. [2023-09-01 02:56:16,572 INFO L137 encePairwiseOnDemand]: 373/377 looper letters, 46 selfloop transitions, 12 changer transitions 0/60 dead transitions. [2023-09-01 02:56:16,572 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 60 transitions, 556 flow [2023-09-01 02:56:16,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 02:56:16,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 02:56:16,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 579 transitions. [2023-09-01 02:56:16,575 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3839522546419098 [2023-09-01 02:56:16,575 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 579 transitions. [2023-09-01 02:56:16,575 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 579 transitions. [2023-09-01 02:56:16,575 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:56:16,575 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 579 transitions. [2023-09-01 02:56:16,576 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 144.75) internal successors, (579), 4 states have internal predecessors, (579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:56:16,578 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 377.0) internal successors, (1885), 5 states have internal predecessors, (1885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:56:16,579 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 377.0) internal successors, (1885), 5 states have internal predecessors, (1885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:56:16,579 INFO L175 Difference]: Start difference. First operand has 64 places, 62 transitions, 448 flow. Second operand 4 states and 579 transitions. [2023-09-01 02:56:16,579 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 60 transitions, 556 flow [2023-09-01 02:56:16,582 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 60 transitions, 497 flow, removed 14 selfloop flow, removed 4 redundant places. [2023-09-01 02:56:16,583 INFO L231 Difference]: Finished difference. Result has 61 places, 60 transitions, 405 flow [2023-09-01 02:56:16,583 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=377, PETRI_DIFFERENCE_MINUEND_FLOW=381, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=405, PETRI_PLACES=61, PETRI_TRANSITIONS=60} [2023-09-01 02:56:16,583 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 6 predicate places. [2023-09-01 02:56:16,583 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 60 transitions, 405 flow [2023-09-01 02:56:16,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 139.5) internal successors, (558), 4 states have internal predecessors, (558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:56:16,584 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:56:16,584 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:56:16,597 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2023-09-01 02:56:16,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:56:16,793 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2023-09-01 02:56:16,793 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:56:16,793 INFO L85 PathProgramCache]: Analyzing trace with hash -173887372, now seen corresponding path program 1 times [2023-09-01 02:56:16,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:56:16,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1193062708] [2023-09-01 02:56:16,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:56:16,794 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:56:16,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:56:16,797 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 02:56:16,800 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2023-09-01 02:56:16,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:56:16,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 5 conjunts are in the unsatisfiable core [2023-09-01 02:56:16,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:56:16,899 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 0 case distinctions, treesize of input 6 treesize of output 7 [2023-09-01 02:56:16,911 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 02:56:16,912 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 02:56:16,912 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:56:16,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1193062708] [2023-09-01 02:56:16,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1193062708] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:56:16,913 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:56:16,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 02:56:16,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112345540] [2023-09-01 02:56:16,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:56:16,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 02:56:16,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:56:16,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 02:56:16,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 02:56:16,993 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 377 [2023-09-01 02:56:16,993 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 60 transitions, 405 flow. Second operand has 4 states, 4 states have (on average 139.5) internal successors, (558), 4 states have internal predecessors, (558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:56:16,994 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:56:16,994 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 377 [2023-09-01 02:56:16,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:56:17,380 INFO L130 PetriNetUnfolder]: 1604/2640 cut-off events. [2023-09-01 02:56:17,380 INFO L131 PetriNetUnfolder]: For 411/411 co-relation queries the response was YES. [2023-09-01 02:56:17,385 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6585 conditions, 2640 events. 1604/2640 cut-off events. For 411/411 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 16006 event pairs, 780 based on Foata normal form. 0/1710 useless extension candidates. Maximal degree in co-relation 6557. Up to 2512 conditions per place. [2023-09-01 02:56:17,393 INFO L137 encePairwiseOnDemand]: 373/377 looper letters, 51 selfloop transitions, 5 changer transitions 0/58 dead transitions. [2023-09-01 02:56:17,394 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 58 transitions, 511 flow [2023-09-01 02:56:17,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 02:56:17,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 02:56:17,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 577 transitions. [2023-09-01 02:56:17,397 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3826259946949602 [2023-09-01 02:56:17,397 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 577 transitions. [2023-09-01 02:56:17,397 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 577 transitions. [2023-09-01 02:56:17,397 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:56:17,397 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 577 transitions. [2023-09-01 02:56:17,399 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 144.25) internal successors, (577), 4 states have internal predecessors, (577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:56:17,401 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 377.0) internal successors, (1885), 5 states have internal predecessors, (1885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:56:17,401 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 377.0) internal successors, (1885), 5 states have internal predecessors, (1885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:56:17,402 INFO L175 Difference]: Start difference. First operand has 61 places, 60 transitions, 405 flow. Second operand 4 states and 577 transitions. [2023-09-01 02:56:17,402 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 58 transitions, 511 flow [2023-09-01 02:56:17,422 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 58 transitions, 498 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 02:56:17,423 INFO L231 Difference]: Finished difference. Result has 60 places, 58 transitions, 396 flow [2023-09-01 02:56:17,423 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=377, PETRI_DIFFERENCE_MINUEND_FLOW=386, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=396, PETRI_PLACES=60, PETRI_TRANSITIONS=58} [2023-09-01 02:56:17,423 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 5 predicate places. [2023-09-01 02:56:17,424 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 58 transitions, 396 flow [2023-09-01 02:56:17,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 139.5) internal successors, (558), 4 states have internal predecessors, (558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:56:17,424 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:56:17,424 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:56:17,435 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2023-09-01 02:56:17,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:56:17,633 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2023-09-01 02:56:17,633 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:56:17,633 INFO L85 PathProgramCache]: Analyzing trace with hash -173887381, now seen corresponding path program 1 times [2023-09-01 02:56:17,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:56:17,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1829720068] [2023-09-01 02:56:17,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:56:17,634 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:56:17,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:56:17,635 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 02:56:17,635 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2023-09-01 02:56:17,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:56:17,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 9 conjunts are in the unsatisfiable core [2023-09-01 02:56:17,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:56:17,774 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 02:56:17,774 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 02:56:17,775 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:56:17,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1829720068] [2023-09-01 02:56:17,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1829720068] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:56:17,775 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:56:17,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 02:56:17,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071330464] [2023-09-01 02:56:17,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:56:17,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 02:56:17,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:56:17,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 02:56:17,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 02:56:17,849 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 377 [2023-09-01 02:56:17,849 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 58 transitions, 396 flow. Second operand has 4 states, 4 states have (on average 141.5) internal successors, (566), 4 states have internal predecessors, (566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:56:17,850 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:56:17,850 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 377 [2023-09-01 02:56:17,850 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:56:18,374 INFO L130 PetriNetUnfolder]: 1469/2455 cut-off events. [2023-09-01 02:56:18,374 INFO L131 PetriNetUnfolder]: For 426/426 co-relation queries the response was YES. [2023-09-01 02:56:18,378 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6136 conditions, 2455 events. 1469/2455 cut-off events. For 426/426 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 14904 event pairs, 726 based on Foata normal form. 8/1650 useless extension candidates. Maximal degree in co-relation 6108. Up to 2299 conditions per place. [2023-09-01 02:56:18,386 INFO L137 encePairwiseOnDemand]: 369/377 looper letters, 55 selfloop transitions, 13 changer transitions 0/70 dead transitions. [2023-09-01 02:56:18,386 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 70 transitions, 570 flow [2023-09-01 02:56:18,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 02:56:18,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 02:56:18,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 601 transitions. [2023-09-01 02:56:18,389 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39854111405835546 [2023-09-01 02:56:18,389 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 601 transitions. [2023-09-01 02:56:18,389 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 601 transitions. [2023-09-01 02:56:18,390 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:56:18,390 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 601 transitions. [2023-09-01 02:56:18,391 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 150.25) internal successors, (601), 4 states have internal predecessors, (601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:56:18,393 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 377.0) internal successors, (1885), 5 states have internal predecessors, (1885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:56:18,394 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 377.0) internal successors, (1885), 5 states have internal predecessors, (1885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:56:18,394 INFO L175 Difference]: Start difference. First operand has 60 places, 58 transitions, 396 flow. Second operand 4 states and 601 transitions. [2023-09-01 02:56:18,394 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 70 transitions, 570 flow [2023-09-01 02:56:18,398 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 70 transitions, 563 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 02:56:18,400 INFO L231 Difference]: Finished difference. Result has 63 places, 59 transitions, 449 flow [2023-09-01 02:56:18,400 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=377, PETRI_DIFFERENCE_MINUEND_FLOW=390, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=449, PETRI_PLACES=63, PETRI_TRANSITIONS=59} [2023-09-01 02:56:18,401 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 8 predicate places. [2023-09-01 02:56:18,401 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 59 transitions, 449 flow [2023-09-01 02:56:18,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 141.5) internal successors, (566), 4 states have internal predecessors, (566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:56:18,402 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:56:18,402 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:56:18,413 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 02:56:18,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:56:18,611 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2023-09-01 02:56:18,611 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:56:18,611 INFO L85 PathProgramCache]: Analyzing trace with hash -173887377, now seen corresponding path program 1 times [2023-09-01 02:56:18,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:56:18,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [358744929] [2023-09-01 02:56:18,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:56:18,612 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:56:18,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:56:18,613 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 02:56:18,616 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2023-09-01 02:56:18,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:56:18,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 18 conjunts are in the unsatisfiable core [2023-09-01 02:56:18,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:56:18,794 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-09-01 02:56:18,795 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-09-01 02:56:18,846 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-09-01 02:56:18,847 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2023-09-01 02:56:18,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:56:18,968 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-09-01 02:56:18,977 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-09-01 02:56:18,977 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 13 treesize of output 13 [2023-09-01 02:56:19,058 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:56:19,059 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:56:19,415 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:56:19,415 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:56:19,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [358744929] [2023-09-01 02:56:19,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [358744929] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:56:19,415 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 02:56:19,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-09-01 02:56:19,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913103357] [2023-09-01 02:56:19,415 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 02:56:19,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-09-01 02:56:19,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:56:19,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-09-01 02:56:19,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-09-01 02:56:21,838 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 377 [2023-09-01 02:56:21,839 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 59 transitions, 449 flow. Second operand has 8 states, 8 states have (on average 124.5) internal successors, (996), 8 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:56:21,839 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:56:21,839 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 377 [2023-09-01 02:56:21,839 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:56:29,582 INFO L130 PetriNetUnfolder]: 3352/6004 cut-off events. [2023-09-01 02:56:29,582 INFO L131 PetriNetUnfolder]: For 2964/2964 co-relation queries the response was YES. [2023-09-01 02:56:29,594 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17414 conditions, 6004 events. 3352/6004 cut-off events. For 2964/2964 co-relation queries the response was YES. Maximal size of possible extension queue 405. Compared 45706 event pairs, 1314 based on Foata normal form. 382/5341 useless extension candidates. Maximal degree in co-relation 17385. Up to 2635 conditions per place. [2023-09-01 02:56:29,612 INFO L137 encePairwiseOnDemand]: 365/377 looper letters, 159 selfloop transitions, 50 changer transitions 27/238 dead transitions. [2023-09-01 02:56:29,612 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 238 transitions, 1744 flow [2023-09-01 02:56:29,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-09-01 02:56:29,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-09-01 02:56:29,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2291 transitions. [2023-09-01 02:56:29,620 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3574660633484163 [2023-09-01 02:56:29,621 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2291 transitions. [2023-09-01 02:56:29,621 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2291 transitions. [2023-09-01 02:56:29,622 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:56:29,622 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2291 transitions. [2023-09-01 02:56:29,627 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 134.76470588235293) internal successors, (2291), 17 states have internal predecessors, (2291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:56:29,634 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 377.0) internal successors, (6786), 18 states have internal predecessors, (6786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:56:29,635 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 377.0) internal successors, (6786), 18 states have internal predecessors, (6786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:56:29,635 INFO L175 Difference]: Start difference. First operand has 63 places, 59 transitions, 449 flow. Second operand 17 states and 2291 transitions. [2023-09-01 02:56:29,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 238 transitions, 1744 flow [2023-09-01 02:56:29,643 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 238 transitions, 1689 flow, removed 12 selfloop flow, removed 2 redundant places. [2023-09-01 02:56:29,646 INFO L231 Difference]: Finished difference. Result has 91 places, 95 transitions, 932 flow [2023-09-01 02:56:29,646 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=377, PETRI_DIFFERENCE_MINUEND_FLOW=418, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=932, PETRI_PLACES=91, PETRI_TRANSITIONS=95} [2023-09-01 02:56:29,647 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 36 predicate places. [2023-09-01 02:56:29,647 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 95 transitions, 932 flow [2023-09-01 02:56:29,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 124.5) internal successors, (996), 8 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:56:29,648 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:56:29,648 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:56:29,660 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2023-09-01 02:56:29,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:56:29,858 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2023-09-01 02:56:29,858 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:56:29,858 INFO L85 PathProgramCache]: Analyzing trace with hash -1088323617, now seen corresponding path program 1 times [2023-09-01 02:56:29,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:56:29,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2135872190] [2023-09-01 02:56:29,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:56:29,859 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:56:29,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:56:29,860 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 02:56:29,863 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2023-09-01 02:56:29,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:56:29,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 20 conjunts are in the unsatisfiable core [2023-09-01 02:56:29,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:56:30,031 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 0 case distinctions, treesize of input 8 treesize of output 7 [2023-09-01 02:56:30,118 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 02:56:30,118 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:56:30,131 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 02:56:30,132 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 237 treesize of output 62 [2023-09-01 02:56:30,725 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 02:56:30,726 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:56:30,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2135872190] [2023-09-01 02:56:30,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2135872190] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:56:30,726 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 02:56:30,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2023-09-01 02:56:30,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646725607] [2023-09-01 02:56:30,727 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 02:56:30,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-09-01 02:56:30,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:56:30,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-09-01 02:56:30,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-09-01 02:56:33,416 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 377 [2023-09-01 02:56:33,417 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 95 transitions, 932 flow. Second operand has 8 states, 8 states have (on average 127.5) internal successors, (1020), 8 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:56:33,417 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:56:33,417 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 377 [2023-09-01 02:56:33,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:56:37,612 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:56:39,637 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:56:41,667 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:56:43,700 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:56:44,994 INFO L130 PetriNetUnfolder]: 2951/5375 cut-off events. [2023-09-01 02:56:44,994 INFO L131 PetriNetUnfolder]: For 19612/19612 co-relation queries the response was YES. [2023-09-01 02:56:45,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19555 conditions, 5375 events. 2951/5375 cut-off events. For 19612/19612 co-relation queries the response was YES. Maximal size of possible extension queue 384. Compared 41019 event pairs, 1802 based on Foata normal form. 232/5596 useless extension candidates. Maximal degree in co-relation 19512. Up to 3592 conditions per place. [2023-09-01 02:56:45,028 INFO L137 encePairwiseOnDemand]: 370/377 looper letters, 105 selfloop transitions, 45 changer transitions 0/152 dead transitions. [2023-09-01 02:56:45,028 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 152 transitions, 1615 flow [2023-09-01 02:56:45,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-09-01 02:56:45,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-09-01 02:56:45,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1334 transitions. [2023-09-01 02:56:45,033 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35384615384615387 [2023-09-01 02:56:45,033 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1334 transitions. [2023-09-01 02:56:45,033 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1334 transitions. [2023-09-01 02:56:45,034 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:56:45,086 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1334 transitions. [2023-09-01 02:56:45,089 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 133.4) internal successors, (1334), 10 states have internal predecessors, (1334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:56:45,094 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 377.0) internal successors, (4147), 11 states have internal predecessors, (4147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:56:45,095 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 377.0) internal successors, (4147), 11 states have internal predecessors, (4147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:56:45,095 INFO L175 Difference]: Start difference. First operand has 91 places, 95 transitions, 932 flow. Second operand 10 states and 1334 transitions. [2023-09-01 02:56:45,095 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 152 transitions, 1615 flow [2023-09-01 02:56:45,125 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 152 transitions, 1593 flow, removed 11 selfloop flow, removed 0 redundant places. [2023-09-01 02:56:45,127 INFO L231 Difference]: Finished difference. Result has 102 places, 98 transitions, 1075 flow [2023-09-01 02:56:45,127 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=377, PETRI_DIFFERENCE_MINUEND_FLOW=922, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1075, PETRI_PLACES=102, PETRI_TRANSITIONS=98} [2023-09-01 02:56:45,128 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 47 predicate places. [2023-09-01 02:56:45,129 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 98 transitions, 1075 flow [2023-09-01 02:56:45,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 127.5) internal successors, (1020), 8 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:56:45,135 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:56:45,136 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:56:45,151 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 02:56:45,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:56:45,346 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2023-09-01 02:56:45,346 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:56:45,346 INFO L85 PathProgramCache]: Analyzing trace with hash 621709420, now seen corresponding path program 1 times [2023-09-01 02:56:45,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:56:45,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1550669898] [2023-09-01 02:56:45,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:56:45,347 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:56:45,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:56:45,348 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 02:56:45,353 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2023-09-01 02:56:45,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:56:45,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 19 conjunts are in the unsatisfiable core [2023-09-01 02:56:45,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:56:45,667 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 51 treesize of output 19 [2023-09-01 02:56:46,898 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 02:56:46,898 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:56:47,023 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 237 treesize of output 62 [2023-09-01 02:56:47,029 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 53 treesize of output 49 [2023-09-01 02:56:47,995 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 02:56:47,995 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:56:47,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1550669898] [2023-09-01 02:56:47,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1550669898] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:56:47,996 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 02:56:47,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-09-01 02:56:47,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661982630] [2023-09-01 02:56:47,997 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 02:56:47,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-09-01 02:56:47,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:56:47,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-09-01 02:56:47,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2023-09-01 02:56:54,632 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 377 [2023-09-01 02:56:54,633 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 98 transitions, 1075 flow. Second operand has 10 states, 10 states have (on average 128.6) internal successors, (1286), 10 states have internal predecessors, (1286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:56:54,633 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:56:54,633 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 377 [2023-09-01 02:56:54,633 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:57:05,558 WARN L222 SmtUtils]: Spent 5.84s on a formula simplification. DAG size of input: 55 DAG size of output: 52 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 02:57:18,824 INFO L130 PetriNetUnfolder]: 4271/7548 cut-off events. [2023-09-01 02:57:18,825 INFO L131 PetriNetUnfolder]: For 22583/22583 co-relation queries the response was YES. [2023-09-01 02:57:18,847 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28678 conditions, 7548 events. 4271/7548 cut-off events. For 22583/22583 co-relation queries the response was YES. Maximal size of possible extension queue 544. Compared 58850 event pairs, 839 based on Foata normal form. 463/8010 useless extension candidates. Maximal degree in co-relation 28632. Up to 3283 conditions per place. [2023-09-01 02:57:18,862 INFO L137 encePairwiseOnDemand]: 364/377 looper letters, 157 selfloop transitions, 60 changer transitions 20/239 dead transitions. [2023-09-01 02:57:18,863 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 239 transitions, 2279 flow [2023-09-01 02:57:18,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-09-01 02:57:18,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-09-01 02:57:18,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 2713 transitions. [2023-09-01 02:57:18,870 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35981432360742704 [2023-09-01 02:57:18,870 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 2713 transitions. [2023-09-01 02:57:18,870 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 2713 transitions. [2023-09-01 02:57:18,872 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:57:18,872 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 2713 transitions. [2023-09-01 02:57:18,876 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 135.65) internal successors, (2713), 20 states have internal predecessors, (2713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:57:18,941 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 377.0) internal successors, (7917), 21 states have internal predecessors, (7917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:57:18,942 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 377.0) internal successors, (7917), 21 states have internal predecessors, (7917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:57:18,942 INFO L175 Difference]: Start difference. First operand has 102 places, 98 transitions, 1075 flow. Second operand 20 states and 2713 transitions. [2023-09-01 02:57:18,942 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 239 transitions, 2279 flow [2023-09-01 02:57:19,004 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 239 transitions, 2150 flow, removed 34 selfloop flow, removed 4 redundant places. [2023-09-01 02:57:19,007 INFO L231 Difference]: Finished difference. Result has 123 places, 114 transitions, 1354 flow [2023-09-01 02:57:19,008 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=377, PETRI_DIFFERENCE_MINUEND_FLOW=964, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=1354, PETRI_PLACES=123, PETRI_TRANSITIONS=114} [2023-09-01 02:57:19,008 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 68 predicate places. [2023-09-01 02:57:19,008 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 114 transitions, 1354 flow [2023-09-01 02:57:19,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 128.6) internal successors, (1286), 10 states have internal predecessors, (1286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:57:19,009 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:57:19,009 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:57:19,019 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 02:57:19,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:57:19,219 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2023-09-01 02:57:19,219 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:57:19,220 INFO L85 PathProgramCache]: Analyzing trace with hash 2099073622, now seen corresponding path program 1 times [2023-09-01 02:57:19,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:57:19,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [281244294] [2023-09-01 02:57:19,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:57:19,220 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:57:19,220 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:57:19,221 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 02:57:19,222 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2023-09-01 02:57:19,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:57:19,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2023-09-01 02:57:19,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:57:19,467 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-09-01 02:57:19,468 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-09-01 02:57:19,560 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-09-01 02:57:19,560 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2023-09-01 02:57:19,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:57:19,692 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-09-01 02:57:19,703 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-09-01 02:57:19,704 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 13 treesize of output 13 [2023-09-01 02:57:19,794 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 02:57:19,794 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:57:19,808 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 02:57:19,808 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 237 treesize of output 62 [2023-09-01 02:57:25,283 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 02:57:25,283 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:57:25,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [281244294] [2023-09-01 02:57:25,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [281244294] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:57:25,283 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 02:57:25,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-09-01 02:57:25,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276048841] [2023-09-01 02:57:25,284 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 02:57:25,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-09-01 02:57:25,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:57:25,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-09-01 02:57:25,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-09-01 02:57:28,009 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:57:29,526 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:57:30,997 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 377 [2023-09-01 02:57:30,997 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 114 transitions, 1354 flow. Second operand has 8 states, 8 states have (on average 124.25) internal successors, (994), 8 states have internal predecessors, (994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:57:30,998 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:57:30,998 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 377 [2023-09-01 02:57:30,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:57:47,984 WARN L222 SmtUtils]: Spent 12.52s on a formula simplification. DAG size of input: 50 DAG size of output: 49 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 02:57:49,444 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:57:54,405 WARN L539 Checker$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 02:57:59,182 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:58:01,208 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:58:03,231 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:58:05,257 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:58:07,281 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:58:09,524 INFO L130 PetriNetUnfolder]: 4888/8704 cut-off events. [2023-09-01 02:58:09,524 INFO L131 PetriNetUnfolder]: For 59880/59880 co-relation queries the response was YES. [2023-09-01 02:58:09,549 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37756 conditions, 8704 events. 4888/8704 cut-off events. For 59880/59880 co-relation queries the response was YES. Maximal size of possible extension queue 592. Compared 69179 event pairs, 2885 based on Foata normal form. 351/9051 useless extension candidates. Maximal degree in co-relation 37704. Up to 3715 conditions per place. [2023-09-01 02:58:09,568 INFO L137 encePairwiseOnDemand]: 369/377 looper letters, 139 selfloop transitions, 39 changer transitions 0/180 dead transitions. [2023-09-01 02:58:09,568 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 180 transitions, 2174 flow [2023-09-01 02:58:09,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-09-01 02:58:09,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-09-01 02:58:09,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1916 transitions. [2023-09-01 02:58:09,574 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33881520778072505 [2023-09-01 02:58:09,574 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1916 transitions. [2023-09-01 02:58:09,574 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1916 transitions. [2023-09-01 02:58:09,575 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:58:09,575 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1916 transitions. [2023-09-01 02:58:09,578 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 127.73333333333333) internal successors, (1916), 15 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 02:58:09,583 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 377.0) internal successors, (6032), 16 states have internal predecessors, (6032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:58:09,584 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 377.0) internal successors, (6032), 16 states have internal predecessors, (6032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:58:09,584 INFO L175 Difference]: Start difference. First operand has 123 places, 114 transitions, 1354 flow. Second operand 15 states and 1916 transitions. [2023-09-01 02:58:09,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 180 transitions, 2174 flow [2023-09-01 02:58:09,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 180 transitions, 2130 flow, removed 19 selfloop flow, removed 2 redundant places. [2023-09-01 02:58:09,694 INFO L231 Difference]: Finished difference. Result has 138 places, 114 transitions, 1411 flow [2023-09-01 02:58:09,694 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=377, PETRI_DIFFERENCE_MINUEND_FLOW=1310, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1411, PETRI_PLACES=138, PETRI_TRANSITIONS=114} [2023-09-01 02:58:09,695 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 83 predicate places. [2023-09-01 02:58:09,695 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 114 transitions, 1411 flow [2023-09-01 02:58:09,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 124.25) internal successors, (994), 8 states have internal predecessors, (994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:58:09,696 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:58:09,696 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:58:09,711 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2023-09-01 02:58:09,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:58:09,907 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2023-09-01 02:58:09,907 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:58:09,907 INFO L85 PathProgramCache]: Analyzing trace with hash 1857182024, now seen corresponding path program 2 times [2023-09-01 02:58:09,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:58:09,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1362996422] [2023-09-01 02:58:09,908 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 02:58:09,908 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:58:09,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:58:09,909 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 02:58:09,909 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2023-09-01 02:58:10,008 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-09-01 02:58:10,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 02:58:10,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 18 conjunts are in the unsatisfiable core [2023-09-01 02:58:10,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:58:10,083 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-09-01 02:58:10,084 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-09-01 02:58:10,148 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-09-01 02:58:10,149 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 2 case distinctions, treesize of input 12 treesize of output 33 [2023-09-01 02:58:10,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:58:10,224 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-09-01 02:58:10,238 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-09-01 02:58:10,238 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 13 treesize of output 13 [2023-09-01 02:58:10,307 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-09-01 02:58:10,307 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 02:58:10,307 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:58:10,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1362996422] [2023-09-01 02:58:10,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1362996422] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:58:10,307 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:58:10,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 02:58:10,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215741757] [2023-09-01 02:58:10,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:58:10,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 02:58:10,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:58:10,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 02:58:10,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 02:58:10,505 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 377 [2023-09-01 02:58:10,506 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 114 transitions, 1411 flow. Second operand has 4 states, 4 states have (on average 136.0) internal successors, (544), 4 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:58:10,506 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:58:10,506 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 377 [2023-09-01 02:58:10,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:58:11,774 INFO L130 PetriNetUnfolder]: 4049/7224 cut-off events. [2023-09-01 02:58:11,775 INFO L131 PetriNetUnfolder]: For 53294/53294 co-relation queries the response was YES. [2023-09-01 02:58:11,794 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29098 conditions, 7224 events. 4049/7224 cut-off events. For 53294/53294 co-relation queries the response was YES. Maximal size of possible extension queue 511. Compared 56435 event pairs, 2305 based on Foata normal form. 467/7531 useless extension candidates. Maximal degree in co-relation 29043. Up to 7055 conditions per place. [2023-09-01 02:58:11,808 INFO L137 encePairwiseOnDemand]: 373/377 looper letters, 98 selfloop transitions, 12 changer transitions 0/112 dead transitions. [2023-09-01 02:58:11,808 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 112 transitions, 1593 flow [2023-09-01 02:58:11,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 02:58:11,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 02:58:11,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 559 transitions. [2023-09-01 02:58:11,809 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3706896551724138 [2023-09-01 02:58:11,809 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 559 transitions. [2023-09-01 02:58:11,809 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 559 transitions. [2023-09-01 02:58:11,810 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:58:11,810 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 559 transitions. [2023-09-01 02:58:11,810 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 139.75) internal successors, (559), 4 states have internal predecessors, (559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:58:11,812 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 377.0) internal successors, (1885), 5 states have internal predecessors, (1885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:58:11,812 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 377.0) internal successors, (1885), 5 states have internal predecessors, (1885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:58:11,812 INFO L175 Difference]: Start difference. First operand has 138 places, 114 transitions, 1411 flow. Second operand 4 states and 559 transitions. [2023-09-01 02:58:11,812 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 112 transitions, 1593 flow [2023-09-01 02:58:11,857 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 112 transitions, 1481 flow, removed 3 selfloop flow, removed 15 redundant places. [2023-09-01 02:58:11,858 INFO L231 Difference]: Finished difference. Result has 124 places, 112 transitions, 1285 flow [2023-09-01 02:58:11,859 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=377, PETRI_DIFFERENCE_MINUEND_FLOW=1261, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1285, PETRI_PLACES=124, PETRI_TRANSITIONS=112} [2023-09-01 02:58:11,860 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 69 predicate places. [2023-09-01 02:58:11,860 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 112 transitions, 1285 flow [2023-09-01 02:58:11,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 136.0) internal successors, (544), 4 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:58:11,861 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:58:11,861 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:58:11,869 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2023-09-01 02:58:12,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:58:12,066 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2023-09-01 02:58:12,066 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:58:12,066 INFO L85 PathProgramCache]: Analyzing trace with hash -833186888, now seen corresponding path program 1 times [2023-09-01 02:58:12,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:58:12,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [161575824] [2023-09-01 02:58:12,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:58:12,067 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:58:12,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:58:12,068 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 02:58:12,078 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2023-09-01 02:58:12,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:58:12,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 10 conjunts are in the unsatisfiable core [2023-09-01 02:58:12,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:58:12,296 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:58:12,297 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:58:12,470 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 31 [2023-09-01 02:58:12,697 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:58:12,697 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:58:12,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [161575824] [2023-09-01 02:58:12,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [161575824] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:58:12,698 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 02:58:12,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-09-01 02:58:12,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085581294] [2023-09-01 02:58:12,698 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 02:58:12,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 02:58:12,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:58:12,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 02:58:12,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2023-09-01 02:58:14,477 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 377 [2023-09-01 02:58:14,478 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 112 transitions, 1285 flow. Second operand has 12 states, 12 states have (on average 134.5) internal successors, (1614), 12 states have internal predecessors, (1614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:58:14,478 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:58:14,478 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 377 [2023-09-01 02:58:14,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:58:16,748 INFO L130 PetriNetUnfolder]: 3419/6282 cut-off events. [2023-09-01 02:58:16,748 INFO L131 PetriNetUnfolder]: For 22447/22447 co-relation queries the response was YES. [2023-09-01 02:58:16,765 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24737 conditions, 6282 events. 3419/6282 cut-off events. For 22447/22447 co-relation queries the response was YES. Maximal size of possible extension queue 422. Compared 48042 event pairs, 573 based on Foata normal form. 572/6847 useless extension candidates. Maximal degree in co-relation 24688. Up to 2747 conditions per place. [2023-09-01 02:58:16,776 INFO L137 encePairwiseOnDemand]: 368/377 looper letters, 79 selfloop transitions, 78 changer transitions 19/178 dead transitions. [2023-09-01 02:58:16,776 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 178 transitions, 1948 flow [2023-09-01 02:58:16,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-09-01 02:58:16,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-09-01 02:58:16,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1705 transitions. [2023-09-01 02:58:16,779 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3768788682581786 [2023-09-01 02:58:16,779 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1705 transitions. [2023-09-01 02:58:16,779 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1705 transitions. [2023-09-01 02:58:16,779 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:58:16,780 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1705 transitions. [2023-09-01 02:58:16,782 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 142.08333333333334) internal successors, (1705), 12 states have internal predecessors, (1705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:58:16,786 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 377.0) internal successors, (4901), 13 states have internal predecessors, (4901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:58:16,786 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 377.0) internal successors, (4901), 13 states have internal predecessors, (4901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:58:16,787 INFO L175 Difference]: Start difference. First operand has 124 places, 112 transitions, 1285 flow. Second operand 12 states and 1705 transitions. [2023-09-01 02:58:16,787 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 178 transitions, 1948 flow [2023-09-01 02:58:16,842 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 178 transitions, 1871 flow, removed 32 selfloop flow, removed 2 redundant places. [2023-09-01 02:58:16,845 INFO L231 Difference]: Finished difference. Result has 139 places, 121 transitions, 1541 flow [2023-09-01 02:58:16,845 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=377, PETRI_DIFFERENCE_MINUEND_FLOW=1236, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1541, PETRI_PLACES=139, PETRI_TRANSITIONS=121} [2023-09-01 02:58:16,846 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 84 predicate places. [2023-09-01 02:58:16,846 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 121 transitions, 1541 flow [2023-09-01 02:58:16,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 134.5) internal successors, (1614), 12 states have internal predecessors, (1614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:58:16,846 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:58:16,846 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:58:16,857 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2023-09-01 02:58:17,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:58:17,056 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2023-09-01 02:58:17,056 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:58:17,057 INFO L85 PathProgramCache]: Analyzing trace with hash -963318421, now seen corresponding path program 2 times [2023-09-01 02:58:17,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:58:17,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1531096142] [2023-09-01 02:58:17,057 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 02:58:17,057 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:58:17,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:58:17,058 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 02:58:17,061 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2023-09-01 02:58:17,147 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-09-01 02:58:17,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 02:58:17,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 16 conjunts are in the unsatisfiable core [2023-09-01 02:58:17,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:58:17,166 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 0 case distinctions, treesize of input 8 treesize of output 7 [2023-09-01 02:58:17,290 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-09-01 02:58:17,290 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 02:58:17,291 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:58:17,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1531096142] [2023-09-01 02:58:17,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1531096142] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:58:17,291 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:58:17,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 02:58:17,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019095651] [2023-09-01 02:58:17,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:58:17,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 02:58:17,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:58:17,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 02:58:17,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 02:58:17,495 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 377 [2023-09-01 02:58:17,496 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 121 transitions, 1541 flow. Second operand has 4 states, 4 states have (on average 139.75) internal successors, (559), 4 states have internal predecessors, (559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:58:17,496 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:58:17,496 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 377 [2023-09-01 02:58:17,496 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:58:18,168 INFO L130 PetriNetUnfolder]: 2054/3833 cut-off events. [2023-09-01 02:58:18,169 INFO L131 PetriNetUnfolder]: For 30003/30003 co-relation queries the response was YES. [2023-09-01 02:58:18,179 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14859 conditions, 3833 events. 2054/3833 cut-off events. For 30003/30003 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 27406 event pairs, 1091 based on Foata normal form. 622/4353 useless extension candidates. Maximal degree in co-relation 14804. Up to 3656 conditions per place. [2023-09-01 02:58:18,185 INFO L137 encePairwiseOnDemand]: 373/377 looper letters, 83 selfloop transitions, 26 changer transitions 0/111 dead transitions. [2023-09-01 02:58:18,185 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 111 transitions, 1633 flow [2023-09-01 02:58:18,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 02:58:18,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 02:58:18,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 573 transitions. [2023-09-01 02:58:18,187 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37997347480106103 [2023-09-01 02:58:18,187 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 573 transitions. [2023-09-01 02:58:18,187 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 573 transitions. [2023-09-01 02:58:18,187 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:58:18,187 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 573 transitions. [2023-09-01 02:58:18,188 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 143.25) internal successors, (573), 4 states have internal predecessors, (573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:58:18,190 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 377.0) internal successors, (1885), 5 states have internal predecessors, (1885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:58:18,190 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 377.0) internal successors, (1885), 5 states have internal predecessors, (1885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:58:18,190 INFO L175 Difference]: Start difference. First operand has 139 places, 121 transitions, 1541 flow. Second operand 4 states and 573 transitions. [2023-09-01 02:58:18,190 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 111 transitions, 1633 flow [2023-09-01 02:58:18,224 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 111 transitions, 1366 flow, removed 32 selfloop flow, removed 15 redundant places. [2023-09-01 02:58:18,225 INFO L231 Difference]: Finished difference. Result has 121 places, 111 transitions, 1200 flow [2023-09-01 02:58:18,226 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=377, PETRI_DIFFERENCE_MINUEND_FLOW=1148, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1200, PETRI_PLACES=121, PETRI_TRANSITIONS=111} [2023-09-01 02:58:18,226 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 66 predicate places. [2023-09-01 02:58:18,226 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 111 transitions, 1200 flow [2023-09-01 02:58:18,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 139.75) internal successors, (559), 4 states have internal predecessors, (559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:58:18,226 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:58:18,226 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1] [2023-09-01 02:58:18,234 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2023-09-01 02:58:18,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:58:18,427 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2023-09-01 02:58:18,427 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:58:18,427 INFO L85 PathProgramCache]: Analyzing trace with hash 1940805319, now seen corresponding path program 3 times [2023-09-01 02:58:18,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:58:18,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [967540900] [2023-09-01 02:58:18,428 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 02:58:18,428 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:58:18,428 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:58:18,429 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 02:58:18,429 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2023-09-01 02:58:18,581 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-09-01 02:58:18,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 02:58:18,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 21 conjunts are in the unsatisfiable core [2023-09-01 02:58:18,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:58:18,655 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-09-01 02:58:18,656 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-09-01 02:58:19,220 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 02:58:19,220 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:58:22,158 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 02:58:22,159 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:58:22,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [967540900] [2023-09-01 02:58:22,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [967540900] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:58:22,159 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 02:58:22,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2023-09-01 02:58:22,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166795093] [2023-09-01 02:58:22,159 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 02:58:22,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-09-01 02:58:22,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:58:22,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-09-01 02:58:22,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2023-09-01 02:58:39,802 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 377 [2023-09-01 02:58:39,803 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 111 transitions, 1200 flow. Second operand has 24 states, 24 states have (on average 133.0) internal successors, (3192), 24 states have internal predecessors, (3192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:58:39,803 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:58:39,803 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 377 [2023-09-01 02:58:39,804 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:58:50,410 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 02:58:52,412 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 02:58:54,414 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 02:58:55,496 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 02:58:57,497 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 02:58:59,499 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 02:59:01,502 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 02:59:03,547 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 02:59:05,511 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.96s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 02:59:07,513 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 02:59:11,143 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.43s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 02:59:18,810 INFO L130 PetriNetUnfolder]: 3485/6518 cut-off events. [2023-09-01 02:59:18,810 INFO L131 PetriNetUnfolder]: For 17956/17956 co-relation queries the response was YES. [2023-09-01 02:59:18,828 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20822 conditions, 6518 events. 3485/6518 cut-off events. For 17956/17956 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 48949 event pairs, 1862 based on Foata normal form. 28/6534 useless extension candidates. Maximal degree in co-relation 20778. Up to 1443 conditions per place. [2023-09-01 02:59:18,843 INFO L137 encePairwiseOnDemand]: 370/377 looper letters, 401 selfloop transitions, 74 changer transitions 0/477 dead transitions. [2023-09-01 02:59:18,844 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 477 transitions, 5121 flow [2023-09-01 02:59:18,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-09-01 02:59:18,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-09-01 02:59:18,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 3697 transitions. [2023-09-01 02:59:18,851 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.377167924913283 [2023-09-01 02:59:18,851 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 3697 transitions. [2023-09-01 02:59:18,851 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 3697 transitions. [2023-09-01 02:59:18,852 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:59:18,852 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 3697 transitions. [2023-09-01 02:59:18,856 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 142.19230769230768) internal successors, (3697), 26 states have internal predecessors, (3697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:59:18,863 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 377.0) internal successors, (10179), 27 states have internal predecessors, (10179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:59:18,864 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 377.0) internal successors, (10179), 27 states have internal predecessors, (10179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:59:18,864 INFO L175 Difference]: Start difference. First operand has 121 places, 111 transitions, 1200 flow. Second operand 26 states and 3697 transitions. [2023-09-01 02:59:18,865 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 477 transitions, 5121 flow [2023-09-01 02:59:18,979 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 477 transitions, 4918 flow, removed 56 selfloop flow, removed 2 redundant places. [2023-09-01 02:59:18,983 INFO L231 Difference]: Finished difference. Result has 159 places, 146 transitions, 1791 flow [2023-09-01 02:59:18,983 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=377, PETRI_DIFFERENCE_MINUEND_FLOW=1153, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=1791, PETRI_PLACES=159, PETRI_TRANSITIONS=146} [2023-09-01 02:59:18,983 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 104 predicate places. [2023-09-01 02:59:18,983 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 146 transitions, 1791 flow [2023-09-01 02:59:18,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 133.0) internal successors, (3192), 24 states have internal predecessors, (3192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:59:18,984 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:59:18,984 INFO L208 CegarLoopForPetriNet]: trace histogram [13, 1, 1, 1] [2023-09-01 02:59:18,997 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2023-09-01 02:59:19,194 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 02:59:19,194 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2023-09-01 02:59:19,195 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:59:19,195 INFO L85 PathProgramCache]: Analyzing trace with hash -814545728, now seen corresponding path program 1 times [2023-09-01 02:59:19,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:59:19,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1598191225] [2023-09-01 02:59:19,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:59:19,195 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:59:19,196 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:59:19,197 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 02:59:19,198 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 02:59:19,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:59:19,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 25 conjunts are in the unsatisfiable core [2023-09-01 02:59:19,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:59:19,359 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 0 case distinctions, treesize of input 8 treesize of output 7 [2023-09-01 02:59:19,983 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:59:19,983 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:59:24,806 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:59:24,806 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:59:24,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1598191225] [2023-09-01 02:59:24,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1598191225] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:59:24,807 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 02:59:24,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 29 [2023-09-01 02:59:24,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098008118] [2023-09-01 02:59:24,807 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 02:59:24,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-09-01 02:59:24,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:59:24,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-09-01 02:59:24,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=617, Unknown=0, NotChecked=0, Total=870 [2023-09-01 02:59:55,239 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 377 [2023-09-01 02:59:55,241 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 146 transitions, 1791 flow. Second operand has 30 states, 30 states have (on average 131.03333333333333) internal successors, (3931), 30 states have internal predecessors, (3931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:59:55,241 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:59:55,241 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 377 [2023-09-01 02:59:55,241 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:00:06,006 WARN L222 SmtUtils]: Spent 7.52s on a formula simplification that was a NOOP. DAG size: 156 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 03:00:08,397 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:00:10,400 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:00:12,224 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.82s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:00:14,097 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.87s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:00:16,157 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:00:18,163 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:00:20,166 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:00:22,169 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:00:24,172 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:00:25,540 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:00:27,542 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:00:29,545 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:00:31,548 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:00:38,517 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:01:06,920 INFO L130 PetriNetUnfolder]: 6452/12053 cut-off events. [2023-09-01 03:01:06,920 INFO L131 PetriNetUnfolder]: For 33757/33757 co-relation queries the response was YES. [2023-09-01 03:01:06,966 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37166 conditions, 12053 events. 6452/12053 cut-off events. For 33757/33757 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 93626 event pairs, 3458 based on Foata normal form. 56/12097 useless extension candidates. Maximal degree in co-relation 37106. Up to 2441 conditions per place. [2023-09-01 03:01:06,989 INFO L137 encePairwiseOnDemand]: 371/377 looper letters, 740 selfloop transitions, 83 changer transitions 0/825 dead transitions. [2023-09-01 03:01:06,989 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 825 transitions, 8794 flow [2023-09-01 03:01:06,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-09-01 03:01:06,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-09-01 03:01:06,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 4324 transitions. [2023-09-01 03:01:06,995 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38231653404067195 [2023-09-01 03:01:06,996 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 4324 transitions. [2023-09-01 03:01:06,996 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 4324 transitions. [2023-09-01 03:01:06,997 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:01:06,997 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 4324 transitions. [2023-09-01 03:01:07,001 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 144.13333333333333) internal successors, (4324), 30 states have internal predecessors, (4324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:01:07,006 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 377.0) internal successors, (11687), 31 states have internal predecessors, (11687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:01:07,006 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 377.0) internal successors, (11687), 31 states have internal predecessors, (11687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:01:07,006 INFO L175 Difference]: Start difference. First operand has 159 places, 146 transitions, 1791 flow. Second operand 30 states and 4324 transitions. [2023-09-01 03:01:07,006 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 825 transitions, 8794 flow [2023-09-01 03:01:07,052 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 825 transitions, 8551 flow, removed 50 selfloop flow, removed 10 redundant places. [2023-09-01 03:01:07,058 INFO L231 Difference]: Finished difference. Result has 193 places, 165 transitions, 2192 flow [2023-09-01 03:01:07,058 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=377, PETRI_DIFFERENCE_MINUEND_FLOW=1622, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=2192, PETRI_PLACES=193, PETRI_TRANSITIONS=165} [2023-09-01 03:01:07,059 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 138 predicate places. [2023-09-01 03:01:07,059 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 165 transitions, 2192 flow [2023-09-01 03:01:07,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 131.03333333333333) internal successors, (3931), 30 states have internal predecessors, (3931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:01:07,060 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:01:07,060 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:01:07,073 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 03:01:07,260 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 03:01:07,260 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2023-09-01 03:01:07,261 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:01:07,261 INFO L85 PathProgramCache]: Analyzing trace with hash -1174638607, now seen corresponding path program 1 times [2023-09-01 03:01:07,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:01:07,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1147112242] [2023-09-01 03:01:07,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:01:07,262 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:01:07,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:01:07,263 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 03:01:07,264 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 03:01:07,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:01:07,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 15 conjunts are in the unsatisfiable core [2023-09-01 03:01:07,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:01:07,503 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 03:01:07,503 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 133 treesize of output 28 [2023-09-01 03:01:07,669 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 03:01:07,669 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:01:07,722 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 03:01:07,722 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 135 treesize of output 30 [2023-09-01 03:01:07,994 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 03:01:07,994 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:01:07,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1147112242] [2023-09-01 03:01:07,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1147112242] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:01:07,995 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:01:07,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2023-09-01 03:01:07,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77195120] [2023-09-01 03:01:07,995 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:01:07,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-09-01 03:01:07,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:01:07,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-09-01 03:01:07,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-09-01 03:01:08,733 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 377 [2023-09-01 03:01:08,733 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 165 transitions, 2192 flow. Second operand has 10 states, 10 states have (on average 138.0) internal successors, (1380), 10 states have internal predecessors, (1380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:01:08,733 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:01:08,734 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 377 [2023-09-01 03:01:08,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:01:11,830 INFO L130 PetriNetUnfolder]: 6902/12500 cut-off events. [2023-09-01 03:01:11,832 INFO L131 PetriNetUnfolder]: For 26633/26633 co-relation queries the response was YES. [2023-09-01 03:01:11,929 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38927 conditions, 12500 events. 6902/12500 cut-off events. For 26633/26633 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 94145 event pairs, 944 based on Foata normal form. 3/12491 useless extension candidates. Maximal degree in co-relation 38851. Up to 9625 conditions per place. [2023-09-01 03:01:11,962 INFO L137 encePairwiseOnDemand]: 368/377 looper letters, 100 selfloop transitions, 83 changer transitions 11/196 dead transitions. [2023-09-01 03:01:11,963 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 196 transitions, 2703 flow [2023-09-01 03:01:11,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-09-01 03:01:11,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-09-01 03:01:11,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1403 transitions. [2023-09-01 03:01:11,966 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3721485411140584 [2023-09-01 03:01:11,966 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1403 transitions. [2023-09-01 03:01:11,966 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1403 transitions. [2023-09-01 03:01:11,967 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:01:11,967 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1403 transitions. [2023-09-01 03:01:11,969 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 140.3) internal successors, (1403), 10 states have internal predecessors, (1403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:01:11,971 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 377.0) internal successors, (4147), 11 states have internal predecessors, (4147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:01:11,971 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 377.0) internal successors, (4147), 11 states have internal predecessors, (4147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:01:11,971 INFO L175 Difference]: Start difference. First operand has 193 places, 165 transitions, 2192 flow. Second operand 10 states and 1403 transitions. [2023-09-01 03:01:11,971 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 196 transitions, 2703 flow [2023-09-01 03:01:12,042 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 196 transitions, 2571 flow, removed 13 selfloop flow, removed 14 redundant places. [2023-09-01 03:01:12,047 INFO L231 Difference]: Finished difference. Result has 190 places, 162 transitions, 2215 flow [2023-09-01 03:01:12,047 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=377, PETRI_DIFFERENCE_MINUEND_FLOW=2060, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2215, PETRI_PLACES=190, PETRI_TRANSITIONS=162} [2023-09-01 03:01:12,048 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 135 predicate places. [2023-09-01 03:01:12,048 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 162 transitions, 2215 flow [2023-09-01 03:01:12,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 138.0) internal successors, (1380), 10 states have internal predecessors, (1380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:01:12,048 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:01:12,049 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:01:12,060 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 (23)] Ended with exit code 0 [2023-09-01 03:01:12,259 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 03:01:12,259 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2023-09-01 03:01:12,260 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:01:12,260 INFO L85 PathProgramCache]: Analyzing trace with hash 1341704599, now seen corresponding path program 2 times [2023-09-01 03:01:12,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:01:12,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [892761901] [2023-09-01 03:01:12,260 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 03:01:12,260 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 03:01:12,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:01:12,261 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 03:01:12,262 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2023-09-01 03:01:12,451 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 03:01:12,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 03:01:12,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 4 conjunts are in the unsatisfiable core [2023-09-01 03:01:12,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:01:12,506 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-09-01 03:01:12,507 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:01:12,507 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:01:12,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [892761901] [2023-09-01 03:01:12,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [892761901] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:01:12,507 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:01:12,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-09-01 03:01:12,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225546394] [2023-09-01 03:01:12,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:01:12,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 03:01:12,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:01:12,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 03:01:12,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-09-01 03:01:12,572 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 377 [2023-09-01 03:01:12,573 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 162 transitions, 2215 flow. Second operand has 5 states, 5 states have (on average 145.6) internal successors, (728), 5 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:01:12,573 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:01:12,573 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 377 [2023-09-01 03:01:12,573 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:01:15,494 INFO L130 PetriNetUnfolder]: 8906/16889 cut-off events. [2023-09-01 03:01:15,495 INFO L131 PetriNetUnfolder]: For 41863/41863 co-relation queries the response was YES. [2023-09-01 03:01:15,578 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52016 conditions, 16889 events. 8906/16889 cut-off events. For 41863/41863 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 132532 event pairs, 3698 based on Foata normal form. 154/17043 useless extension candidates. Maximal degree in co-relation 51937. Up to 11130 conditions per place. [2023-09-01 03:01:15,610 INFO L137 encePairwiseOnDemand]: 372/377 looper letters, 183 selfloop transitions, 16 changer transitions 8/207 dead transitions. [2023-09-01 03:01:15,611 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 207 transitions, 2976 flow [2023-09-01 03:01:15,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 03:01:15,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 03:01:15,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 753 transitions. [2023-09-01 03:01:15,613 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39946949602122017 [2023-09-01 03:01:15,613 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 753 transitions. [2023-09-01 03:01:15,613 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 753 transitions. [2023-09-01 03:01:15,613 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:01:15,613 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 753 transitions. [2023-09-01 03:01:15,614 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 150.6) internal successors, (753), 5 states have internal predecessors, (753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:01:15,615 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 377.0) internal successors, (2262), 6 states have internal predecessors, (2262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:01:15,615 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 377.0) internal successors, (2262), 6 states have internal predecessors, (2262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:01:15,615 INFO L175 Difference]: Start difference. First operand has 190 places, 162 transitions, 2215 flow. Second operand 5 states and 753 transitions. [2023-09-01 03:01:15,615 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 207 transitions, 2976 flow [2023-09-01 03:01:15,774 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 207 transitions, 2852 flow, removed 7 selfloop flow, removed 8 redundant places. [2023-09-01 03:01:15,777 INFO L231 Difference]: Finished difference. Result has 187 places, 166 transitions, 2238 flow [2023-09-01 03:01:15,777 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=377, PETRI_DIFFERENCE_MINUEND_FLOW=2119, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2238, PETRI_PLACES=187, PETRI_TRANSITIONS=166} [2023-09-01 03:01:15,777 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 132 predicate places. [2023-09-01 03:01:15,777 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 166 transitions, 2238 flow [2023-09-01 03:01:15,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 145.6) internal successors, (728), 5 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:01:15,778 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:01:15,778 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:01:15,786 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 03:01:15,978 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 03:01:15,978 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2023-09-01 03:01:15,979 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:01:15,979 INFO L85 PathProgramCache]: Analyzing trace with hash -777270709, now seen corresponding path program 3 times [2023-09-01 03:01:15,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:01:15,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [551099224] [2023-09-01 03:01:15,979 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 03:01:15,979 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 03:01:15,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:01:15,981 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 03:01:15,985 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 03:01:16,146 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-09-01 03:01:16,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 03:01:16,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 03:01:16,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:01:16,229 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-09-01 03:01:16,230 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:01:16,320 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-09-01 03:01:16,320 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:01:16,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [551099224] [2023-09-01 03:01:16,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [551099224] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:01:16,321 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:01:16,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2023-09-01 03:01:16,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842451454] [2023-09-01 03:01:16,321 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:01:16,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-09-01 03:01:16,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:01:16,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-09-01 03:01:16,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2023-09-01 03:01:16,380 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 377 [2023-09-01 03:01:16,381 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 166 transitions, 2238 flow. Second operand has 10 states, 10 states have (on average 142.7) internal successors, (1427), 10 states have internal predecessors, (1427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:01:16,381 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:01:16,381 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 377 [2023-09-01 03:01:16,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:01:22,222 INFO L130 PetriNetUnfolder]: 15398/28546 cut-off events. [2023-09-01 03:01:22,222 INFO L131 PetriNetUnfolder]: For 95539/95539 co-relation queries the response was YES. [2023-09-01 03:01:22,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104628 conditions, 28546 events. 15398/28546 cut-off events. For 95539/95539 co-relation queries the response was YES. Maximal size of possible extension queue 549. Compared 237534 event pairs, 1250 based on Foata normal form. 1184/29730 useless extension candidates. Maximal degree in co-relation 104548. Up to 9444 conditions per place. [2023-09-01 03:01:22,445 INFO L137 encePairwiseOnDemand]: 371/377 looper letters, 219 selfloop transitions, 37 changer transitions 5/261 dead transitions. [2023-09-01 03:01:22,446 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 261 transitions, 3514 flow [2023-09-01 03:01:22,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-09-01 03:01:22,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-09-01 03:01:22,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1479 transitions. [2023-09-01 03:01:22,449 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3923076923076923 [2023-09-01 03:01:22,449 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1479 transitions. [2023-09-01 03:01:22,449 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1479 transitions. [2023-09-01 03:01:22,450 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:01:22,450 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1479 transitions. [2023-09-01 03:01:22,451 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 147.9) internal successors, (1479), 10 states have internal predecessors, (1479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:01:22,454 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 377.0) internal successors, (4147), 11 states have internal predecessors, (4147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:01:22,454 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 377.0) internal successors, (4147), 11 states have internal predecessors, (4147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:01:22,454 INFO L175 Difference]: Start difference. First operand has 187 places, 166 transitions, 2238 flow. Second operand 10 states and 1479 transitions. [2023-09-01 03:01:22,454 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 261 transitions, 3514 flow [2023-09-01 03:01:23,102 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 261 transitions, 3358 flow, removed 54 selfloop flow, removed 2 redundant places. [2023-09-01 03:01:23,106 INFO L231 Difference]: Finished difference. Result has 198 places, 193 transitions, 2583 flow [2023-09-01 03:01:23,106 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=377, PETRI_DIFFERENCE_MINUEND_FLOW=2173, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2583, PETRI_PLACES=198, PETRI_TRANSITIONS=193} [2023-09-01 03:01:23,107 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 143 predicate places. [2023-09-01 03:01:23,107 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 193 transitions, 2583 flow [2023-09-01 03:01:23,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 142.7) internal successors, (1427), 10 states have internal predecessors, (1427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:01:23,108 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:01:23,108 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:01:23,117 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 (25)] Ended with exit code 0 [2023-09-01 03:01:23,312 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 03:01:23,313 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2023-09-01 03:01:23,313 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:01:23,313 INFO L85 PathProgramCache]: Analyzing trace with hash -1489472423, now seen corresponding path program 4 times [2023-09-01 03:01:23,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:01:23,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [692837968] [2023-09-01 03:01:23,314 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 03:01:23,314 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:01:23,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:01:23,315 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 03:01:23,315 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 03:01:23,461 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 03:01:23,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 03:01:23,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 4 conjunts are in the unsatisfiable core [2023-09-01 03:01:23,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:01:23,506 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-09-01 03:01:23,506 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:01:23,506 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:01:23,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [692837968] [2023-09-01 03:01:23,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [692837968] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:01:23,506 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:01:23,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-09-01 03:01:23,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882533428] [2023-09-01 03:01:23,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:01:23,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 03:01:23,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:01:23,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 03:01:23,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-09-01 03:01:23,542 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 377 [2023-09-01 03:01:23,543 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 193 transitions, 2583 flow. Second operand has 5 states, 5 states have (on average 144.6) internal successors, (723), 5 states have internal predecessors, (723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:01:23,543 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:01:23,543 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 377 [2023-09-01 03:01:23,543 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:01:29,206 INFO L130 PetriNetUnfolder]: 15976/30125 cut-off events. [2023-09-01 03:01:29,206 INFO L131 PetriNetUnfolder]: For 140247/140247 co-relation queries the response was YES. [2023-09-01 03:01:29,413 INFO L83 FinitePrefix]: Finished finitePrefix Result has 131600 conditions, 30125 events. 15976/30125 cut-off events. For 140247/140247 co-relation queries the response was YES. Maximal size of possible extension queue 589. Compared 255140 event pairs, 6518 based on Foata normal form. 462/30587 useless extension candidates. Maximal degree in co-relation 131516. Up to 19818 conditions per place. [2023-09-01 03:01:29,485 INFO L137 encePairwiseOnDemand]: 371/377 looper letters, 181 selfloop transitions, 56 changer transitions 8/245 dead transitions. [2023-09-01 03:01:29,485 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 245 transitions, 3577 flow [2023-09-01 03:01:29,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 03:01:29,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 03:01:29,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 749 transitions. [2023-09-01 03:01:29,487 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39734748010610077 [2023-09-01 03:01:29,487 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 749 transitions. [2023-09-01 03:01:29,487 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 749 transitions. [2023-09-01 03:01:29,487 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:01:29,487 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 749 transitions. [2023-09-01 03:01:29,488 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 149.8) internal successors, (749), 5 states have internal predecessors, (749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:01:29,489 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 377.0) internal successors, (2262), 6 states have internal predecessors, (2262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:01:29,489 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 377.0) internal successors, (2262), 6 states have internal predecessors, (2262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:01:29,490 INFO L175 Difference]: Start difference. First operand has 198 places, 193 transitions, 2583 flow. Second operand 5 states and 749 transitions. [2023-09-01 03:01:29,490 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 245 transitions, 3577 flow [2023-09-01 03:01:30,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 245 transitions, 3547 flow, removed 15 selfloop flow, removed 0 redundant places. [2023-09-01 03:01:30,978 INFO L231 Difference]: Finished difference. Result has 205 places, 216 transitions, 3040 flow [2023-09-01 03:01:30,978 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=377, PETRI_DIFFERENCE_MINUEND_FLOW=2555, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3040, PETRI_PLACES=205, PETRI_TRANSITIONS=216} [2023-09-01 03:01:30,978 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 150 predicate places. [2023-09-01 03:01:30,978 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 216 transitions, 3040 flow [2023-09-01 03:01:30,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 144.6) internal successors, (723), 5 states have internal predecessors, (723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:01:30,978 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:01:30,979 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:01:30,986 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2023-09-01 03:01:31,179 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 03:01:31,179 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2023-09-01 03:01:31,180 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:01:31,180 INFO L85 PathProgramCache]: Analyzing trace with hash -164258713, now seen corresponding path program 5 times [2023-09-01 03:01:31,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:01:31,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [163983153] [2023-09-01 03:01:31,180 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 03:01:31,180 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 03:01:31,180 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:01:31,181 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 03:01:31,183 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2023-09-01 03:01:31,335 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 03:01:31,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 03:01:31,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 4 conjunts are in the unsatisfiable core [2023-09-01 03:01:31,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:01:31,378 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-09-01 03:01:31,378 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:01:31,378 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:01:31,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [163983153] [2023-09-01 03:01:31,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [163983153] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:01:31,378 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:01:31,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-09-01 03:01:31,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512781547] [2023-09-01 03:01:31,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:01:31,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 03:01:31,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:01:31,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 03:01:31,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-09-01 03:01:31,431 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 377 [2023-09-01 03:01:31,432 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 216 transitions, 3040 flow. Second operand has 5 states, 5 states have (on average 144.6) internal successors, (723), 5 states have internal predecessors, (723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:01:31,432 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:01:31,432 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 377 [2023-09-01 03:01:31,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:01:37,146 INFO L130 PetriNetUnfolder]: 14975/28277 cut-off events. [2023-09-01 03:01:37,146 INFO L131 PetriNetUnfolder]: For 171940/171940 co-relation queries the response was YES. [2023-09-01 03:01:37,440 INFO L83 FinitePrefix]: Finished finitePrefix Result has 132456 conditions, 28277 events. 14975/28277 cut-off events. For 171940/171940 co-relation queries the response was YES. Maximal size of possible extension queue 553. Compared 237145 event pairs, 6436 based on Foata normal form. 462/28739 useless extension candidates. Maximal degree in co-relation 132368. Up to 21690 conditions per place. [2023-09-01 03:01:37,523 INFO L137 encePairwiseOnDemand]: 371/377 looper letters, 201 selfloop transitions, 53 changer transitions 13/267 dead transitions. [2023-09-01 03:01:37,523 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 267 transitions, 4051 flow [2023-09-01 03:01:37,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 03:01:37,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 03:01:37,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 898 transitions. [2023-09-01 03:01:37,526 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39699381078691426 [2023-09-01 03:01:37,526 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 898 transitions. [2023-09-01 03:01:37,526 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 898 transitions. [2023-09-01 03:01:37,526 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:01:37,526 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 898 transitions. [2023-09-01 03:01:37,527 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 149.66666666666666) internal successors, (898), 6 states have internal predecessors, (898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:01:37,529 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 377.0) internal successors, (2639), 7 states have internal predecessors, (2639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:01:37,529 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 377.0) internal successors, (2639), 7 states have internal predecessors, (2639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:01:37,529 INFO L175 Difference]: Start difference. First operand has 205 places, 216 transitions, 3040 flow. Second operand 6 states and 898 transitions. [2023-09-01 03:01:37,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 267 transitions, 4051 flow [2023-09-01 03:01:38,919 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 267 transitions, 3927 flow, removed 34 selfloop flow, removed 2 redundant places. [2023-09-01 03:01:38,922 INFO L231 Difference]: Finished difference. Result has 210 places, 239 transitions, 3472 flow [2023-09-01 03:01:38,923 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=377, PETRI_DIFFERENCE_MINUEND_FLOW=2950, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3472, PETRI_PLACES=210, PETRI_TRANSITIONS=239} [2023-09-01 03:01:38,923 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 155 predicate places. [2023-09-01 03:01:38,923 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 239 transitions, 3472 flow [2023-09-01 03:01:38,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 144.6) internal successors, (723), 5 states have internal predecessors, (723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:01:38,924 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:01:38,924 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:01:38,932 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 03:01:39,125 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 03:01:39,125 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2023-09-01 03:01:39,125 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:01:39,126 INFO L85 PathProgramCache]: Analyzing trace with hash -137248141, now seen corresponding path program 6 times [2023-09-01 03:01:39,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:01:39,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1656374265] [2023-09-01 03:01:39,126 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 03:01:39,126 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 03:01:39,126 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:01:39,127 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 03:01:39,129 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 03:01:39,295 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-09-01 03:01:39,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 03:01:39,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 03:01:39,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:01:39,375 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-09-01 03:01:39,375 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:01:39,466 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-09-01 03:01:39,466 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:01:39,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1656374265] [2023-09-01 03:01:39,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1656374265] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:01:39,466 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:01:39,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2023-09-01 03:01:39,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87086905] [2023-09-01 03:01:39,466 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:01:39,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-09-01 03:01:39,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:01:39,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-09-01 03:01:39,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2023-09-01 03:01:39,569 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 377 [2023-09-01 03:01:39,570 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 239 transitions, 3472 flow. Second operand has 10 states, 10 states have (on average 142.4) internal successors, (1424), 10 states have internal predecessors, (1424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:01:39,570 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:01:39,570 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 377 [2023-09-01 03:01:39,571 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:01:47,566 INFO L130 PetriNetUnfolder]: 18716/35561 cut-off events. [2023-09-01 03:01:47,566 INFO L131 PetriNetUnfolder]: For 252846/252846 co-relation queries the response was YES. [2023-09-01 03:01:48,267 INFO L83 FinitePrefix]: Finished finitePrefix Result has 173284 conditions, 35561 events. 18716/35561 cut-off events. For 252846/252846 co-relation queries the response was YES. Maximal size of possible extension queue 700. Compared 312410 event pairs, 2186 based on Foata normal form. 1628/37189 useless extension candidates. Maximal degree in co-relation 173194. Up to 19550 conditions per place. [2023-09-01 03:01:48,389 INFO L137 encePairwiseOnDemand]: 371/377 looper letters, 216 selfloop transitions, 96 changer transitions 4/316 dead transitions. [2023-09-01 03:01:48,389 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 316 transitions, 4735 flow [2023-09-01 03:01:48,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-09-01 03:01:48,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-09-01 03:01:48,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1622 transitions. [2023-09-01 03:01:48,393 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3911261152640463 [2023-09-01 03:01:48,393 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1622 transitions. [2023-09-01 03:01:48,393 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1622 transitions. [2023-09-01 03:01:48,393 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:01:48,393 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1622 transitions. [2023-09-01 03:01:48,395 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 147.45454545454547) internal successors, (1622), 11 states have internal predecessors, (1622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:01:48,398 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 377.0) internal successors, (4524), 12 states have internal predecessors, (4524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:01:48,399 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 377.0) internal successors, (4524), 12 states have internal predecessors, (4524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:01:48,399 INFO L175 Difference]: Start difference. First operand has 210 places, 239 transitions, 3472 flow. Second operand 11 states and 1622 transitions. [2023-09-01 03:01:48,399 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 316 transitions, 4735 flow [2023-09-01 03:01:52,503 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 316 transitions, 4413 flow, removed 78 selfloop flow, removed 6 redundant places. [2023-09-01 03:01:52,508 INFO L231 Difference]: Finished difference. Result has 219 places, 269 transitions, 3890 flow [2023-09-01 03:01:52,509 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=377, PETRI_DIFFERENCE_MINUEND_FLOW=3202, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3890, PETRI_PLACES=219, PETRI_TRANSITIONS=269} [2023-09-01 03:01:52,509 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 164 predicate places. [2023-09-01 03:01:52,509 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 269 transitions, 3890 flow [2023-09-01 03:01:52,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 142.4) internal successors, (1424), 10 states have internal predecessors, (1424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:01:52,509 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:01:52,510 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:01:52,520 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Ended with exit code 0 [2023-09-01 03:01:52,710 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 03:01:52,710 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2023-09-01 03:01:52,711 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:01:52,711 INFO L85 PathProgramCache]: Analyzing trace with hash 1476104227, now seen corresponding path program 7 times [2023-09-01 03:01:52,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:01:52,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1320412831] [2023-09-01 03:01:52,711 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 03:01:52,711 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 03:01:52,711 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:01:52,712 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 03:01:52,713 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 03:01:52,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:01:52,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 03:01:52,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:01:52,972 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-09-01 03:01:52,972 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:01:53,097 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-09-01 03:01:53,097 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:01:53,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1320412831] [2023-09-01 03:01:53,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1320412831] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:01:53,097 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:01:53,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2023-09-01 03:01:53,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60982021] [2023-09-01 03:01:53,098 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:01:53,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-09-01 03:01:53,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:01:53,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-09-01 03:01:53,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2023-09-01 03:01:53,195 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 377 [2023-09-01 03:01:53,196 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 269 transitions, 3890 flow. Second operand has 10 states, 10 states have (on average 142.3) internal successors, (1423), 10 states have internal predecessors, (1423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:01:53,196 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:01:53,197 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 377 [2023-09-01 03:01:53,197 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:02:02,768 INFO L130 PetriNetUnfolder]: 20152/38875 cut-off events. [2023-09-01 03:02:02,768 INFO L131 PetriNetUnfolder]: For 327248/327248 co-relation queries the response was YES. [2023-09-01 03:02:03,090 INFO L83 FinitePrefix]: Finished finitePrefix Result has 207828 conditions, 38875 events. 20152/38875 cut-off events. For 327248/327248 co-relation queries the response was YES. Maximal size of possible extension queue 774. Compared 351214 event pairs, 6814 based on Foata normal form. 1628/40503 useless extension candidates. Maximal degree in co-relation 207736. Up to 27550 conditions per place. [2023-09-01 03:02:03,202 INFO L137 encePairwiseOnDemand]: 371/377 looper letters, 221 selfloop transitions, 97 changer transitions 4/322 dead transitions. [2023-09-01 03:02:03,202 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 322 transitions, 4968 flow [2023-09-01 03:02:03,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-09-01 03:02:03,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-09-01 03:02:03,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1472 transitions. [2023-09-01 03:02:03,205 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3904509283819629 [2023-09-01 03:02:03,205 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1472 transitions. [2023-09-01 03:02:03,205 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1472 transitions. [2023-09-01 03:02:03,205 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:02:03,205 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1472 transitions. [2023-09-01 03:02:03,207 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 147.2) internal successors, (1472), 10 states have internal predecessors, (1472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:02:03,209 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 377.0) internal successors, (4147), 11 states have internal predecessors, (4147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:02:03,210 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 377.0) internal successors, (4147), 11 states have internal predecessors, (4147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:02:03,210 INFO L175 Difference]: Start difference. First operand has 219 places, 269 transitions, 3890 flow. Second operand 10 states and 1472 transitions. [2023-09-01 03:02:03,210 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 322 transitions, 4968 flow [2023-09-01 03:02:08,715 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 322 transitions, 4881 flow, removed 31 selfloop flow, removed 2 redundant places. [2023-09-01 03:02:08,720 INFO L231 Difference]: Finished difference. Result has 230 places, 287 transitions, 4303 flow [2023-09-01 03:02:08,720 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=377, PETRI_DIFFERENCE_MINUEND_FLOW=3815, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=269, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4303, PETRI_PLACES=230, PETRI_TRANSITIONS=287} [2023-09-01 03:02:08,720 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 175 predicate places. [2023-09-01 03:02:08,720 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 287 transitions, 4303 flow [2023-09-01 03:02:08,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 142.3) internal successors, (1423), 10 states have internal predecessors, (1423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:02:08,721 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:02:08,721 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:02:08,730 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 03:02:08,925 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 03:02:08,925 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2023-09-01 03:02:08,925 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:02:08,925 INFO L85 PathProgramCache]: Analyzing trace with hash 1018895833, now seen corresponding path program 1 times [2023-09-01 03:02:08,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:02:08,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1880635948] [2023-09-01 03:02:08,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:02:08,926 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 03:02:08,926 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:02:08,927 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 03:02:08,928 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2023-09-01 03:02:09,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:02:09,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 4 conjunts are in the unsatisfiable core [2023-09-01 03:02:09,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:02:09,125 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-09-01 03:02:09,125 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:02:09,125 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:02:09,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1880635948] [2023-09-01 03:02:09,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1880635948] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:02:09,126 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:02:09,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-09-01 03:02:09,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964768301] [2023-09-01 03:02:09,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:02:09,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 03:02:09,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:02:09,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 03:02:09,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-09-01 03:02:09,158 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 377 [2023-09-01 03:02:09,159 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 287 transitions, 4303 flow. Second operand has 5 states, 5 states have (on average 145.6) internal successors, (728), 5 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:02:09,159 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:02:09,159 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 377 [2023-09-01 03:02:09,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:02:18,405 INFO L130 PetriNetUnfolder]: 20087/38736 cut-off events. [2023-09-01 03:02:18,405 INFO L131 PetriNetUnfolder]: For 303890/303890 co-relation queries the response was YES. [2023-09-01 03:02:19,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 223192 conditions, 38736 events. 20087/38736 cut-off events. For 303890/303890 co-relation queries the response was YES. Maximal size of possible extension queue 775. Compared 349189 event pairs, 2822 based on Foata normal form. 392/39128 useless extension candidates. Maximal degree in co-relation 223096. Up to 27034 conditions per place. [2023-09-01 03:02:19,145 INFO L137 encePairwiseOnDemand]: 372/377 looper letters, 235 selfloop transitions, 73 changer transitions 1/309 dead transitions. [2023-09-01 03:02:19,145 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 309 transitions, 5116 flow [2023-09-01 03:02:19,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 03:02:19,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 03:02:19,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 749 transitions. [2023-09-01 03:02:19,147 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39734748010610077 [2023-09-01 03:02:19,147 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 749 transitions. [2023-09-01 03:02:19,147 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 749 transitions. [2023-09-01 03:02:19,147 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:02:19,148 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 749 transitions. [2023-09-01 03:02:19,148 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 149.8) internal successors, (749), 5 states have internal predecessors, (749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:02:19,150 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 377.0) internal successors, (2262), 6 states have internal predecessors, (2262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:02:19,150 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 377.0) internal successors, (2262), 6 states have internal predecessors, (2262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:02:19,150 INFO L175 Difference]: Start difference. First operand has 230 places, 287 transitions, 4303 flow. Second operand 5 states and 749 transitions. [2023-09-01 03:02:19,150 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 309 transitions, 5116 flow [2023-09-01 03:02:25,888 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 309 transitions, 4853 flow, removed 48 selfloop flow, removed 7 redundant places. [2023-09-01 03:02:25,892 INFO L231 Difference]: Finished difference. Result has 228 places, 291 transitions, 4326 flow [2023-09-01 03:02:25,893 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=377, PETRI_DIFFERENCE_MINUEND_FLOW=4044, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=287, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=4326, PETRI_PLACES=228, PETRI_TRANSITIONS=291} [2023-09-01 03:02:25,893 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 173 predicate places. [2023-09-01 03:02:25,894 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 291 transitions, 4326 flow [2023-09-01 03:02:25,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 145.6) internal successors, (728), 5 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:02:25,894 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:02:25,894 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:02:25,907 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2023-09-01 03:02:26,105 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 03:02:26,106 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2023-09-01 03:02:26,106 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:02:26,107 INFO L85 PathProgramCache]: Analyzing trace with hash -800661259, now seen corresponding path program 2 times [2023-09-01 03:02:26,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:02:26,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [477458913] [2023-09-01 03:02:26,107 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 03:02:26,107 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 03:02:26,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:02:26,109 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 03:02:26,151 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 03:02:26,346 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 03:02:26,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 03:02:26,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 03:02:26,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:02:26,455 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-09-01 03:02:26,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:02:26,633 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-09-01 03:02:26,633 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:02:26,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [477458913] [2023-09-01 03:02:26,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [477458913] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:02:26,634 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:02:26,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2023-09-01 03:02:26,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296828897] [2023-09-01 03:02:26,634 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:02:26,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-09-01 03:02:26,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:02:26,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-09-01 03:02:26,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2023-09-01 03:02:26,777 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 377 [2023-09-01 03:02:26,778 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 291 transitions, 4326 flow. Second operand has 10 states, 10 states have (on average 142.5) internal successors, (1425), 10 states have internal predecessors, (1425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:02:26,778 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:02:26,778 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 377 [2023-09-01 03:02:26,778 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:02:37,557 INFO L130 PetriNetUnfolder]: 22255/42530 cut-off events. [2023-09-01 03:02:37,558 INFO L131 PetriNetUnfolder]: For 350780/350780 co-relation queries the response was YES. [2023-09-01 03:02:38,189 INFO L83 FinitePrefix]: Finished finitePrefix Result has 242251 conditions, 42530 events. 22255/42530 cut-off events. For 350780/350780 co-relation queries the response was YES. Maximal size of possible extension queue 838. Compared 385792 event pairs, 7355 based on Foata normal form. 888/43418 useless extension candidates. Maximal degree in co-relation 242156. Up to 30833 conditions per place. [2023-09-01 03:02:38,327 INFO L137 encePairwiseOnDemand]: 371/377 looper letters, 250 selfloop transitions, 87 changer transitions 1/338 dead transitions. [2023-09-01 03:02:38,327 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 338 transitions, 5395 flow [2023-09-01 03:02:38,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-09-01 03:02:38,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-09-01 03:02:38,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1473 transitions. [2023-09-01 03:02:38,330 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3907161803713528 [2023-09-01 03:02:38,331 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1473 transitions. [2023-09-01 03:02:38,331 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1473 transitions. [2023-09-01 03:02:38,331 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:02:38,331 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1473 transitions. [2023-09-01 03:02:38,333 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 147.3) internal successors, (1473), 10 states have internal predecessors, (1473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:02:38,335 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 377.0) internal successors, (4147), 11 states have internal predecessors, (4147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:02:38,335 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 377.0) internal successors, (4147), 11 states have internal predecessors, (4147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:02:38,335 INFO L175 Difference]: Start difference. First operand has 228 places, 291 transitions, 4326 flow. Second operand 10 states and 1473 transitions. [2023-09-01 03:02:38,335 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 338 transitions, 5395 flow [2023-09-01 03:02:45,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 338 transitions, 5285 flow, removed 19 selfloop flow, removed 3 redundant places. [2023-09-01 03:02:45,123 INFO L231 Difference]: Finished difference. Result has 237 places, 303 transitions, 4662 flow [2023-09-01 03:02:45,124 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=377, PETRI_DIFFERENCE_MINUEND_FLOW=4220, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4662, PETRI_PLACES=237, PETRI_TRANSITIONS=303} [2023-09-01 03:02:45,124 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 182 predicate places. [2023-09-01 03:02:45,124 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 303 transitions, 4662 flow [2023-09-01 03:02:45,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 142.5) internal successors, (1425), 10 states have internal predecessors, (1425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:02:45,124 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:02:45,125 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:02:45,133 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 (31)] Ended with exit code 0 [2023-09-01 03:02:45,325 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 03:02:45,325 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2023-09-01 03:02:45,325 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:02:45,326 INFO L85 PathProgramCache]: Analyzing trace with hash 1673249165, now seen corresponding path program 3 times [2023-09-01 03:02:45,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:02:45,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [272950676] [2023-09-01 03:02:45,326 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 03:02:45,326 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 03:02:45,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:02:45,327 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 03:02:45,328 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 03:02:45,518 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-09-01 03:02:45,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 03:02:45,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 03:02:45,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:02:45,600 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-09-01 03:02:45,600 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:02:45,691 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-09-01 03:02:45,692 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:02:45,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [272950676] [2023-09-01 03:02:45,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [272950676] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:02:45,692 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:02:45,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2023-09-01 03:02:45,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683571402] [2023-09-01 03:02:45,692 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:02:45,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-09-01 03:02:45,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:02:45,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-09-01 03:02:45,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2023-09-01 03:02:45,810 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 377 [2023-09-01 03:02:45,811 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 303 transitions, 4662 flow. Second operand has 10 states, 10 states have (on average 142.3) internal successors, (1423), 10 states have internal predecessors, (1423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:02:45,811 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:02:45,811 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 377 [2023-09-01 03:02:45,811 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:02:55,863 INFO L130 PetriNetUnfolder]: 23679/44864 cut-off events. [2023-09-01 03:02:55,863 INFO L131 PetriNetUnfolder]: For 375937/375937 co-relation queries the response was YES. [2023-09-01 03:02:57,297 INFO L83 FinitePrefix]: Finished finitePrefix Result has 265578 conditions, 44864 events. 23679/44864 cut-off events. For 375937/375937 co-relation queries the response was YES. Maximal size of possible extension queue 879. Compared 406097 event pairs, 3122 based on Foata normal form. 888/45752 useless extension candidates. Maximal degree in co-relation 265480. Up to 27854 conditions per place. [2023-09-01 03:02:57,515 INFO L137 encePairwiseOnDemand]: 371/377 looper letters, 236 selfloop transitions, 113 changer transitions 2/351 dead transitions. [2023-09-01 03:02:57,515 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 351 transitions, 5816 flow [2023-09-01 03:02:57,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-09-01 03:02:57,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-09-01 03:02:57,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1469 transitions. [2023-09-01 03:02:57,528 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3896551724137931 [2023-09-01 03:02:57,528 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1469 transitions. [2023-09-01 03:02:57,528 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1469 transitions. [2023-09-01 03:02:57,532 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:02:57,533 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1469 transitions. [2023-09-01 03:02:57,535 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 146.9) internal successors, (1469), 10 states have internal predecessors, (1469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:02:57,537 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 377.0) internal successors, (4147), 11 states have internal predecessors, (4147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:02:57,537 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 377.0) internal successors, (4147), 11 states have internal predecessors, (4147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:02:57,537 INFO L175 Difference]: Start difference. First operand has 237 places, 303 transitions, 4662 flow. Second operand 10 states and 1469 transitions. [2023-09-01 03:02:57,541 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 351 transitions, 5816 flow [2023-09-01 03:03:08,776 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 351 transitions, 5580 flow, removed 22 selfloop flow, removed 6 redundant places. [2023-09-01 03:03:08,782 INFO L231 Difference]: Finished difference. Result has 243 places, 317 transitions, 4984 flow [2023-09-01 03:03:08,782 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=377, PETRI_DIFFERENCE_MINUEND_FLOW=4429, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=301, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4984, PETRI_PLACES=243, PETRI_TRANSITIONS=317} [2023-09-01 03:03:08,782 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 188 predicate places. [2023-09-01 03:03:08,783 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 317 transitions, 4984 flow [2023-09-01 03:03:08,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 142.3) internal successors, (1423), 10 states have internal predecessors, (1423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:03:08,783 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:03:08,783 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:03:08,791 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 03:03:08,985 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 03:03:08,985 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2023-09-01 03:03:08,985 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:03:08,985 INFO L85 PathProgramCache]: Analyzing trace with hash 235626368, now seen corresponding path program 1 times [2023-09-01 03:03:08,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:03:08,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1270910155] [2023-09-01 03:03:08,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:03:08,986 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 03:03:08,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:03:08,989 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 03:03:08,989 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 (33)] Waiting until timeout for monitored process [2023-09-01 03:03:09,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:03:09,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 9 conjunts are in the unsatisfiable core [2023-09-01 03:03:09,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:03:09,283 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-09-01 03:03:09,283 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:03:12,422 INFO L321 Elim1Store]: treesize reduction 48, result has 84.1 percent of original size [2023-09-01 03:03:12,423 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 12 new quantified variables, introduced 28 case distinctions, treesize of input 418 treesize of output 331 [2023-09-01 03:03:16,991 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-09-01 03:03:16,992 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:03:16,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1270910155] [2023-09-01 03:03:16,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1270910155] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:03:16,992 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:03:16,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 3] total 4 [2023-09-01 03:03:16,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402401697] [2023-09-01 03:03:16,992 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:03:16,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-09-01 03:03:16,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:03:16,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-09-01 03:03:16,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=17, Unknown=3, NotChecked=0, Total=30 [2023-09-01 03:03:18,421 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.43s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-09-01 03:03:20,542 WARN L539 Checker$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 03:03:22,565 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-09-01 03:03:24,750 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-09-01 03:03:26,775 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-09-01 03:03:28,798 WARN L539 Checker$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 03:03:30,985 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-09-01 03:03:30,986 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 377 [2023-09-01 03:03:30,986 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 317 transitions, 4984 flow. Second operand has 6 states, 6 states have (on average 142.66666666666666) internal successors, (856), 6 states have internal predecessors, (856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:03:30,986 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:03:30,986 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 377 [2023-09-01 03:03:30,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:03:33,002 WARN L539 Checker$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 03:03:35,386 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-09-01 03:03:39,762 WARN L539 Checker$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 03:03:53,243 INFO L130 PetriNetUnfolder]: 28762/54511 cut-off events. [2023-09-01 03:03:53,243 INFO L131 PetriNetUnfolder]: For 565624/567662 co-relation queries the response was YES. [2023-09-01 03:03:54,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 342736 conditions, 54511 events. 28762/54511 cut-off events. For 565624/567662 co-relation queries the response was YES. Maximal size of possible extension queue 1117. Compared 512380 event pairs, 3436 based on Foata normal form. 1259/55089 useless extension candidates. Maximal degree in co-relation 342636. Up to 36859 conditions per place. [2023-09-01 03:03:54,644 INFO L137 encePairwiseOnDemand]: 373/377 looper letters, 224 selfloop transitions, 122 changer transitions 1/355 dead transitions. [2023-09-01 03:03:54,644 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 355 transitions, 6134 flow [2023-09-01 03:03:54,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 03:03:54,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 03:03:54,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 591 transitions. [2023-09-01 03:03:54,647 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39190981432360744 [2023-09-01 03:03:54,647 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 591 transitions. [2023-09-01 03:03:54,647 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 591 transitions. [2023-09-01 03:03:54,647 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:03:54,647 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 591 transitions. [2023-09-01 03:03:54,648 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 147.75) internal successors, (591), 4 states have internal predecessors, (591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:03:54,649 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 377.0) internal successors, (1885), 5 states have internal predecessors, (1885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:03:54,649 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 377.0) internal successors, (1885), 5 states have internal predecessors, (1885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:03:54,649 INFO L175 Difference]: Start difference. First operand has 243 places, 317 transitions, 4984 flow. Second operand 4 states and 591 transitions. [2023-09-01 03:03:54,649 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 355 transitions, 6134 flow [2023-09-01 03:04:06,653 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 355 transitions, 5775 flow, removed 47 selfloop flow, removed 8 redundant places. [2023-09-01 03:04:06,658 INFO L231 Difference]: Finished difference. Result has 239 places, 338 transitions, 5462 flow [2023-09-01 03:04:06,658 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=377, PETRI_DIFFERENCE_MINUEND_FLOW=4651, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=317, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=5462, PETRI_PLACES=239, PETRI_TRANSITIONS=338} [2023-09-01 03:04:06,659 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 184 predicate places. [2023-09-01 03:04:06,659 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 338 transitions, 5462 flow [2023-09-01 03:04:06,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 142.66666666666666) internal successors, (856), 6 states have internal predecessors, (856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:04:06,659 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:04:06,659 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:04:06,667 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 03:04:06,860 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 03:04:06,860 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2023-09-01 03:04:06,860 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:04:06,860 INFO L85 PathProgramCache]: Analyzing trace with hash 569115710, now seen corresponding path program 2 times [2023-09-01 03:04:06,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:04:06,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1310499517] [2023-09-01 03:04:06,861 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 03:04:06,861 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 03:04:06,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:04:06,862 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 03:04:06,863 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 03:04:07,039 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 03:04:07,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 03:04:07,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 9 conjunts are in the unsatisfiable core [2023-09-01 03:04:07,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:04:07,172 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-09-01 03:04:07,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:04:10,196 INFO L321 Elim1Store]: treesize reduction 48, result has 84.1 percent of original size [2023-09-01 03:04:10,197 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 12 new quantified variables, introduced 28 case distinctions, treesize of input 418 treesize of output 331 [2023-09-01 03:04:12,802 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-09-01 03:04:12,802 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:04:12,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1310499517] [2023-09-01 03:04:12,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1310499517] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:04:12,802 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:04:12,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 3] total 4 [2023-09-01 03:04:12,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325394397] [2023-09-01 03:04:12,803 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:04:12,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-09-01 03:04:12,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:04:12,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-09-01 03:04:12,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=18, Unknown=2, NotChecked=0, Total=30 [2023-09-01 03:04:14,809 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-09-01 03:04:16,838 WARN L539 Checker$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 03:04:18,857 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-09-01 03:04:21,451 WARN L539 Checker$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 03:04:23,490 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-09-01 03:04:25,702 WARN L539 Checker$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 03:04:25,736 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 377 [2023-09-01 03:04:25,737 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 338 transitions, 5462 flow. Second operand has 6 states, 6 states have (on average 142.66666666666666) internal successors, (856), 6 states have internal predecessors, (856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:04:25,737 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:04:25,737 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 377 [2023-09-01 03:04:25,737 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:04:27,758 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-09-01 03:04:29,861 WARN L539 Checker$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 03:04:34,680 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 03:04:52,393 INFO L130 PetriNetUnfolder]: 34860/66571 cut-off events. [2023-09-01 03:04:52,393 INFO L131 PetriNetUnfolder]: For 714448/716998 co-relation queries the response was YES. [2023-09-01 03:04:53,920 INFO L83 FinitePrefix]: Finished finitePrefix Result has 428695 conditions, 66571 events. 34860/66571 cut-off events. For 714448/716998 co-relation queries the response was YES. Maximal size of possible extension queue 1380. Compared 650886 event pairs, 7466 based on Foata normal form. 1612/67227 useless extension candidates. Maximal degree in co-relation 428593. Up to 49273 conditions per place. [2023-09-01 03:04:54,180 INFO L137 encePairwiseOnDemand]: 372/377 looper letters, 261 selfloop transitions, 114 changer transitions 1/384 dead transitions. [2023-09-01 03:04:54,180 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 384 transitions, 6788 flow [2023-09-01 03:04:54,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 03:04:54,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 03:04:54,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 593 transitions. [2023-09-01 03:04:54,183 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.393236074270557 [2023-09-01 03:04:54,183 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 593 transitions. [2023-09-01 03:04:54,183 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 593 transitions. [2023-09-01 03:04:54,183 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:04:54,183 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 593 transitions. [2023-09-01 03:04:54,183 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 148.25) internal successors, (593), 4 states have internal predecessors, (593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:04:54,189 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 377.0) internal successors, (1885), 5 states have internal predecessors, (1885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:04:54,189 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 377.0) internal successors, (1885), 5 states have internal predecessors, (1885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:04:54,189 INFO L175 Difference]: Start difference. First operand has 239 places, 338 transitions, 5462 flow. Second operand 4 states and 593 transitions. [2023-09-01 03:04:54,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 384 transitions, 6788 flow [2023-09-01 03:05:11,867 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 384 transitions, 6690 flow, removed 24 selfloop flow, removed 1 redundant places. [2023-09-01 03:05:11,874 INFO L231 Difference]: Finished difference. Result has 243 places, 365 transitions, 6296 flow [2023-09-01 03:05:11,874 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=377, PETRI_DIFFERENCE_MINUEND_FLOW=5374, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=338, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=6296, PETRI_PLACES=243, PETRI_TRANSITIONS=365} [2023-09-01 03:05:11,875 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 188 predicate places. [2023-09-01 03:05:11,875 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 365 transitions, 6296 flow [2023-09-01 03:05:11,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 142.66666666666666) internal successors, (856), 6 states have internal predecessors, (856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:05:11,875 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:05:11,875 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:05:11,889 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 03:05:12,076 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 03:05:12,076 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2023-09-01 03:05:12,077 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:05:12,077 INFO L85 PathProgramCache]: Analyzing trace with hash -1222906542, now seen corresponding path program 3 times [2023-09-01 03:05:12,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:05:12,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [967385918] [2023-09-01 03:05:12,077 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 03:05:12,077 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 03:05:12,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:05:12,078 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 03:05:12,080 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 03:05:12,402 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-09-01 03:05:12,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 03:05:12,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 15 conjunts are in the unsatisfiable core [2023-09-01 03:05:12,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:05:12,546 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 03:05:12,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:05:12,855 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2023-09-01 03:05:12,855 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 194 treesize of output 159 [2023-09-01 03:05:12,880 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 03:05:12,881 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 148 treesize of output 78 [2023-09-01 03:05:13,228 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-09-01 03:05:13,229 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:05:24,113 INFO L321 Elim1Store]: treesize reduction 597, result has 68.2 percent of original size [2023-09-01 03:05:24,114 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 16 new quantified variables, introduced 66 case distinctions, treesize of input 3912 treesize of output 3172 [2023-09-01 03:05:29,370 WARN L222 SmtUtils]: Spent 5.03s on a formula simplification. DAG size of input: 239 DAG size of output: 167 (called from [L 318] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2023-09-01 03:05:29,371 INFO L321 Elim1Store]: treesize reduction 162, result has 73.7 percent of original size [2023-09-01 03:05:29,372 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 12 disjoint index pairs (out of 66 index pairs), introduced 16 new quantified variables, introduced 54 case distinctions, treesize of input 2240 treesize of output 1617 [2023-09-01 03:05:29,597 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 03:05:29,599 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 03:05:29,619 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 03:05:29,633 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 03:05:29,634 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 03:05:29,635 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 03:05:29,636 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 03:05:29,637 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 03:05:29,665 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 03:05:29,665 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 03:05:29,666 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 03:05:29,667 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 03:05:29,819 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 03:05:29,820 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 24 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 4 case distinctions, treesize of input 344 treesize of output 238 Killed by 15