./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/chl-node-symm.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/chl-node-symm.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 514e162b13bdcbe99106b4f79e5a61b8afdae9b478788e06b35106cd952df62f --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 05:09:26,719 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 05:09:26,721 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 05:09:26,756 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 05:09:26,758 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 05:09:26,760 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 05:09:26,761 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 05:09:26,763 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 05:09:26,765 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 05:09:26,768 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 05:09:26,769 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 05:09:26,770 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 05:09:26,771 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 05:09:26,772 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 05:09:26,773 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 05:09:26,775 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 05:09:26,776 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 05:09:26,777 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 05:09:26,778 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 05:09:26,782 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 05:09:26,782 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 05:09:26,791 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 05:09:26,792 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 05:09:26,792 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 05:09:26,797 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 05:09:26,797 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 05:09:26,798 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 05:09:26,799 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 05:09:26,799 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 05:09:26,800 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 05:09:26,800 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 05:09:26,805 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 05:09:26,806 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 05:09:26,807 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 05:09:26,807 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 05:09:26,808 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 05:09:26,808 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 05:09:26,808 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 05:09:26,809 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 05:09:26,809 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 05:09:26,809 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 05:09:26,811 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-30 05:09:26,836 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 05:09:26,836 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 05:09:26,837 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 05:09:26,837 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 05:09:26,838 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 05:09:26,838 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 05:09:26,838 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 05:09:26,838 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 05:09:26,838 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 05:09:26,839 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 05:09:26,839 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 05:09:26,839 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 05:09:26,840 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 05:09:26,840 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 05:09:26,840 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 05:09:26,840 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 05:09:26,840 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 05:09:26,840 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 05:09:26,840 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 05:09:26,841 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 05:09:26,841 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 05:09:26,841 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 05:09:26,841 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 05:09:26,841 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 05:09:26,841 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 05:09:26,841 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 05:09:26,842 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 05:09:26,842 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 05:09:26,842 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 05:09:26,842 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 05:09:26,842 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 05:09:26,842 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 05:09:26,843 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 05:09:26,843 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 05:09:26,843 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 514e162b13bdcbe99106b4f79e5a61b8afdae9b478788e06b35106cd952df62f Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 05:09:27,103 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 05:09:27,115 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 05:09:27,117 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 05:09:27,118 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 05:09:27,118 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 05:09:27,119 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/chl-node-symm.wvr.c [2023-08-30 05:09:28,053 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 05:09:28,307 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 05:09:28,308 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-node-symm.wvr.c [2023-08-30 05:09:28,313 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0cfc5b5a6/ad84dd84da774b65b59c148affbbaaf8/FLAG90ec34a35 [2023-08-30 05:09:28,322 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0cfc5b5a6/ad84dd84da774b65b59c148affbbaaf8 [2023-08-30 05:09:28,323 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 05:09:28,324 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 05:09:28,325 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 05:09:28,325 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 05:09:28,327 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 05:09:28,328 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 05:09:28" (1/1) ... [2023-08-30 05:09:28,328 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6051d644 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:09:28, skipping insertion in model container [2023-08-30 05:09:28,329 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 05:09:28" (1/1) ... [2023-08-30 05:09:28,333 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 05:09:28,347 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 05:09:28,458 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-node-symm.wvr.c[3305,3318] [2023-08-30 05:09:28,470 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 05:09:28,479 ERROR L324 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2023-08-30 05:09:28,480 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@758a64ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:09:28, skipping insertion in model container [2023-08-30 05:09:28,480 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 05:09:28,481 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-08-30 05:09:28,482 INFO L158 Benchmark]: Toolchain (without parser) took 157.08ms. Allocated memory is still 100.7MB. Free memory was 78.2MB in the beginning and 67.9MB in the end (delta: 10.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-08-30 05:09:28,483 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 69.2MB. Free memory was 47.8MB in the beginning and 47.7MB in the end (delta: 44.5kB). There was no memory consumed. Max. memory is 16.1GB. [2023-08-30 05:09:28,483 INFO L158 Benchmark]: CACSL2BoogieTranslator took 155.48ms. Allocated memory is still 100.7MB. Free memory was 78.0MB in the beginning and 68.2MB in the end (delta: 9.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-08-30 05:09:28,485 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 69.2MB. Free memory was 47.8MB in the beginning and 47.7MB in the end (delta: 44.5kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 155.48ms. Allocated memory is still 100.7MB. Free memory was 78.0MB in the beginning and 68.2MB in the end (delta: 9.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 102]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/chl-node-symm.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 514e162b13bdcbe99106b4f79e5a61b8afdae9b478788e06b35106cd952df62f --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 05:09:30,028 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 05:09:30,030 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 05:09:30,058 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 05:09:30,063 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 05:09:30,064 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 05:09:30,065 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 05:09:30,068 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 05:09:30,069 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 05:09:30,070 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 05:09:30,071 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 05:09:30,073 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 05:09:30,074 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 05:09:30,076 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 05:09:30,077 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 05:09:30,078 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 05:09:30,078 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 05:09:30,081 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 05:09:30,082 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 05:09:30,085 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 05:09:30,087 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 05:09:30,090 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 05:09:30,091 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 05:09:30,092 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 05:09:30,094 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 05:09:30,098 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 05:09:30,099 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 05:09:30,099 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 05:09:30,100 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 05:09:30,101 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 05:09:30,101 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 05:09:30,102 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 05:09:30,103 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 05:09:30,103 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 05:09:30,104 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 05:09:30,105 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 05:09:30,105 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 05:09:30,105 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 05:09:30,106 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 05:09:30,106 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 05:09:30,107 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 05:09:30,108 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-08-30 05:09:30,127 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 05:09:30,127 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 05:09:30,128 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 05:09:30,128 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 05:09:30,129 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 05:09:30,129 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 05:09:30,130 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 05:09:30,130 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 05:09:30,130 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 05:09:30,130 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 05:09:30,131 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 05:09:30,131 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 05:09:30,131 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 05:09:30,131 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 05:09:30,131 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 05:09:30,131 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 05:09:30,132 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 05:09:30,132 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 05:09:30,132 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 05:09:30,132 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 05:09:30,132 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-08-30 05:09:30,132 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-08-30 05:09:30,132 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 05:09:30,133 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 05:09:30,133 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 05:09:30,133 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 05:09:30,133 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 05:09:30,133 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 05:09:30,133 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 05:09:30,134 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 05:09:30,134 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-08-30 05:09:30,134 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-08-30 05:09:30,134 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 05:09:30,134 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 05:09:30,134 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 05:09:30,135 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-08-30 05:09:30,135 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 05:09:30,135 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 514e162b13bdcbe99106b4f79e5a61b8afdae9b478788e06b35106cd952df62f Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 05:09:30,394 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 05:09:30,407 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 05:09:30,409 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 05:09:30,410 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 05:09:30,410 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 05:09:30,411 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/chl-node-symm.wvr.c [2023-08-30 05:09:31,388 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 05:09:31,595 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 05:09:31,595 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-node-symm.wvr.c [2023-08-30 05:09:31,601 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7014469f4/003af84971d44f0eb5ad904cff4f57a2/FLAG72f7dfefa [2023-08-30 05:09:31,609 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7014469f4/003af84971d44f0eb5ad904cff4f57a2 [2023-08-30 05:09:31,611 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 05:09:31,611 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 05:09:31,612 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 05:09:31,612 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 05:09:31,625 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 05:09:31,626 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 05:09:31" (1/1) ... [2023-08-30 05:09:31,627 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b57c94b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:09:31, skipping insertion in model container [2023-08-30 05:09:31,628 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 05:09:31" (1/1) ... [2023-08-30 05:09:31,632 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 05:09:31,653 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 05:09:31,802 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-node-symm.wvr.c[3305,3318] [2023-08-30 05:09:31,823 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 05:09:31,834 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-08-30 05:09:31,840 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 05:09:31,863 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-node-symm.wvr.c[3305,3318] [2023-08-30 05:09:31,871 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 05:09:31,877 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 05:09:31,907 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-node-symm.wvr.c[3305,3318] [2023-08-30 05:09:31,911 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 05:09:31,923 INFO L208 MainTranslator]: Completed translation [2023-08-30 05:09:31,924 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:09:31 WrapperNode [2023-08-30 05:09:31,924 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 05:09:31,925 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 05:09:31,925 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 05:09:31,925 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 05:09:31,929 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:09:31" (1/1) ... [2023-08-30 05:09:31,945 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:09:31" (1/1) ... [2023-08-30 05:09:31,973 INFO L138 Inliner]: procedures = 28, calls = 50, calls flagged for inlining = 18, calls inlined = 24, statements flattened = 282 [2023-08-30 05:09:31,973 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 05:09:31,974 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 05:09:31,974 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 05:09:31,974 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 05:09:31,979 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:09:31" (1/1) ... [2023-08-30 05:09:31,980 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:09:31" (1/1) ... [2023-08-30 05:09:31,985 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:09:31" (1/1) ... [2023-08-30 05:09:31,986 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:09:31" (1/1) ... [2023-08-30 05:09:31,993 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:09:31" (1/1) ... [2023-08-30 05:09:31,996 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:09:31" (1/1) ... [2023-08-30 05:09:32,010 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:09:31" (1/1) ... [2023-08-30 05:09:32,011 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:09:31" (1/1) ... [2023-08-30 05:09:32,013 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 05:09:32,014 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 05:09:32,014 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 05:09:32,014 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 05:09:32,015 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:09:31" (1/1) ... [2023-08-30 05:09:32,024 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 05:09:32,035 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 05:09:32,051 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-30 05:09:32,064 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-30 05:09:32,076 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 05:09:32,076 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2023-08-30 05:09:32,076 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-08-30 05:09:32,076 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 05:09:32,076 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-08-30 05:09:32,076 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 05:09:32,076 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 05:09:32,076 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 05:09:32,076 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 05:09:32,076 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-30 05:09:32,076 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 05:09:32,076 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 05:09:32,076 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2023-08-30 05:09:32,076 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 05:09:32,077 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-08-30 05:09:32,077 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-30 05:09:32,168 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 05:09:32,170 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 05:09:32,818 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 05:09:32,826 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 05:09:32,828 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-08-30 05:09:32,830 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 05:09:32 BoogieIcfgContainer [2023-08-30 05:09:32,830 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 05:09:32,831 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 05:09:32,831 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 05:09:32,833 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 05:09:32,833 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 05:09:31" (1/3) ... [2023-08-30 05:09:32,834 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fe2d531 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 05:09:32, skipping insertion in model container [2023-08-30 05:09:32,834 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:09:31" (2/3) ... [2023-08-30 05:09:32,834 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fe2d531 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 05:09:32, skipping insertion in model container [2023-08-30 05:09:32,834 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 05:09:32" (3/3) ... [2023-08-30 05:09:32,835 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-node-symm.wvr.c [2023-08-30 05:09:32,847 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 05:09:32,848 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 42 error locations. [2023-08-30 05:09:32,848 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 05:09:32,970 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-30 05:09:32,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 354 places, 375 transitions, 766 flow [2023-08-30 05:09:33,087 INFO L130 PetriNetUnfolder]: 28/373 cut-off events. [2023-08-30 05:09:33,087 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 05:09:33,097 INFO L83 FinitePrefix]: Finished finitePrefix Result has 382 conditions, 373 events. 28/373 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 555 event pairs, 0 based on Foata normal form. 0/303 useless extension candidates. Maximal degree in co-relation 284. Up to 2 conditions per place. [2023-08-30 05:09:33,097 INFO L82 GeneralOperation]: Start removeDead. Operand has 354 places, 375 transitions, 766 flow [2023-08-30 05:09:33,106 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 348 places, 369 transitions, 750 flow [2023-08-30 05:09:33,108 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 05:09:33,113 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 348 places, 369 transitions, 750 flow [2023-08-30 05:09:33,115 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 348 places, 369 transitions, 750 flow [2023-08-30 05:09:33,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 348 places, 369 transitions, 750 flow [2023-08-30 05:09:33,173 INFO L130 PetriNetUnfolder]: 28/369 cut-off events. [2023-08-30 05:09:33,174 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 05:09:33,178 INFO L83 FinitePrefix]: Finished finitePrefix Result has 378 conditions, 369 events. 28/369 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 546 event pairs, 0 based on Foata normal form. 0/300 useless extension candidates. Maximal degree in co-relation 284. Up to 2 conditions per place. [2023-08-30 05:09:33,182 INFO L119 LiptonReduction]: Number of co-enabled transitions 9676 [2023-08-30 05:10:09,642 INFO L134 LiptonReduction]: Checked pairs total: 14522 [2023-08-30 05:10:09,642 INFO L136 LiptonReduction]: Total number of compositions: 447 [2023-08-30 05:10:09,652 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 05:10:09,656 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;@14134676, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 05:10:09,656 INFO L358 AbstractCegarLoop]: Starting to check reachability of 68 error locations. [2023-08-30 05:10:09,658 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-08-30 05:10:09,658 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 05:10:09,658 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:10:09,659 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 05:10:09,659 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2023-08-30 05:10:09,662 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:10:09,662 INFO L85 PathProgramCache]: Analyzing trace with hash 46781, now seen corresponding path program 1 times [2023-08-30 05:10:09,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:10:09,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1313417594] [2023-08-30 05:10:09,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:10:09,670 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:10:09,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:10:09,673 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 05:10:09,673 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-08-30 05:10:09,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:10:09,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 05:10:09,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:10:09,907 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-30 05:10:09,907 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-30 05:10:09,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 05:10:09,962 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 05:10:09,962 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:10:09,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1313417594] [2023-08-30 05:10:09,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1313417594] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:10:09,963 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 05:10:09,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 05:10:09,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590712587] [2023-08-30 05:10:09,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:10:09,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 05:10:09,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:10:09,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 05:10:09,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 05:10:10,249 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 338 out of 822 [2023-08-30 05:10:10,253 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 67 transitions, 146 flow. Second operand has 3 states, 3 states have (on average 338.6666666666667) internal successors, (1016), 3 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:10:10,253 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:10:10,253 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 338 of 822 [2023-08-30 05:10:10,253 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:10:10,729 INFO L130 PetriNetUnfolder]: 1023/1704 cut-off events. [2023-08-30 05:10:10,729 INFO L131 PetriNetUnfolder]: For 22/22 co-relation queries the response was YES. [2023-08-30 05:10:10,731 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3441 conditions, 1704 events. 1023/1704 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 8707 event pairs, 945 based on Foata normal form. 0/492 useless extension candidates. Maximal degree in co-relation 3250. Up to 1684 conditions per place. [2023-08-30 05:10:10,738 INFO L137 encePairwiseOnDemand]: 810/822 looper letters, 59 selfloop transitions, 5 changer transitions 0/68 dead transitions. [2023-08-30 05:10:10,738 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 68 transitions, 276 flow [2023-08-30 05:10:10,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 05:10:10,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 05:10:10,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1085 transitions. [2023-08-30 05:10:10,752 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4399837793998378 [2023-08-30 05:10:10,754 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1085 transitions. [2023-08-30 05:10:10,754 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1085 transitions. [2023-08-30 05:10:10,756 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:10:10,758 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1085 transitions. [2023-08-30 05:10:10,762 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 361.6666666666667) internal successors, (1085), 3 states have internal predecessors, (1085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:10:10,768 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 822.0) internal successors, (3288), 4 states have internal predecessors, (3288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:10:10,771 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 822.0) internal successors, (3288), 4 states have internal predecessors, (3288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:10:10,773 INFO L175 Difference]: Start difference. First operand has 68 places, 67 transitions, 146 flow. Second operand 3 states and 1085 transitions. [2023-08-30 05:10:10,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 68 transitions, 276 flow [2023-08-30 05:10:10,777 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 68 transitions, 268 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-30 05:10:10,779 INFO L231 Difference]: Finished difference. Result has 63 places, 66 transitions, 168 flow [2023-08-30 05:10:10,780 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=822, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=168, PETRI_PLACES=63, PETRI_TRANSITIONS=66} [2023-08-30 05:10:10,782 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, -5 predicate places. [2023-08-30 05:10:10,783 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 66 transitions, 168 flow [2023-08-30 05:10:10,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 338.6666666666667) internal successors, (1016), 3 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:10:10,784 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:10:10,787 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 05:10:10,796 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Ended with exit code 0 [2023-08-30 05:10:10,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:10:10,993 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2023-08-30 05:10:10,994 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:10:10,994 INFO L85 PathProgramCache]: Analyzing trace with hash 46782, now seen corresponding path program 1 times [2023-08-30 05:10:10,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:10:10,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [94662558] [2023-08-30 05:10:10,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:10:10,995 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:10:10,995 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:10:10,996 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 05:10:10,998 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-08-30 05:10:11,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:10:11,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 05:10:11,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:10:11,079 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-08-30 05:10:11,080 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2023-08-30 05:10:11,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 05:10:11,088 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 05:10:11,089 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:10:11,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [94662558] [2023-08-30 05:10:11,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [94662558] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:10:11,089 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 05:10:11,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 05:10:11,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984244096] [2023-08-30 05:10:11,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:10:11,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 05:10:11,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:10:11,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 05:10:11,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 05:10:11,241 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 340 out of 822 [2023-08-30 05:10:11,242 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 66 transitions, 168 flow. Second operand has 3 states, 3 states have (on average 340.6666666666667) internal successors, (1022), 3 states have internal predecessors, (1022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:10:11,242 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:10:11,242 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 340 of 822 [2023-08-30 05:10:11,242 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:10:11,628 INFO L130 PetriNetUnfolder]: 1023/1700 cut-off events. [2023-08-30 05:10:11,629 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 05:10:11,630 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3422 conditions, 1700 events. 1023/1700 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 8678 event pairs, 945 based on Foata normal form. 4/498 useless extension candidates. Maximal degree in co-relation 3380. Up to 1684 conditions per place. [2023-08-30 05:10:11,635 INFO L137 encePairwiseOnDemand]: 819/822 looper letters, 59 selfloop transitions, 1 changer transitions 0/64 dead transitions. [2023-08-30 05:10:11,635 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 64 transitions, 284 flow [2023-08-30 05:10:11,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 05:10:11,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 05:10:11,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1078 transitions. [2023-08-30 05:10:11,638 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43714517437145173 [2023-08-30 05:10:11,638 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1078 transitions. [2023-08-30 05:10:11,638 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1078 transitions. [2023-08-30 05:10:11,639 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:10:11,639 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1078 transitions. [2023-08-30 05:10:11,640 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 359.3333333333333) internal successors, (1078), 3 states have internal predecessors, (1078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:10:11,644 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 822.0) internal successors, (3288), 4 states have internal predecessors, (3288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:10:11,645 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 822.0) internal successors, (3288), 4 states have internal predecessors, (3288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:10:11,645 INFO L175 Difference]: Start difference. First operand has 63 places, 66 transitions, 168 flow. Second operand 3 states and 1078 transitions. [2023-08-30 05:10:11,645 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 64 transitions, 284 flow [2023-08-30 05:10:11,646 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 64 transitions, 274 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 05:10:11,647 INFO L231 Difference]: Finished difference. Result has 61 places, 64 transitions, 156 flow [2023-08-30 05:10:11,647 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=822, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=156, PETRI_PLACES=61, PETRI_TRANSITIONS=64} [2023-08-30 05:10:11,647 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, -7 predicate places. [2023-08-30 05:10:11,648 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 64 transitions, 156 flow [2023-08-30 05:10:11,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 340.6666666666667) internal successors, (1022), 3 states have internal predecessors, (1022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:10:11,648 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:10:11,648 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 05:10:11,657 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2023-08-30 05:10:11,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:10:11,856 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2023-08-30 05:10:11,856 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:10:11,856 INFO L85 PathProgramCache]: Analyzing trace with hash 1456754, now seen corresponding path program 1 times [2023-08-30 05:10:11,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:10:11,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [425523489] [2023-08-30 05:10:11,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:10:11,857 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:10:11,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:10:11,862 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 05:10:11,863 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 (4)] Waiting until timeout for monitored process [2023-08-30 05:10:11,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:10:11,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-30 05:10:11,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:10:11,980 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-30 05:10:11,981 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-30 05:10:12,022 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 05:10:12,023 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 05:10:12,156 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 05:10:12,156 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:10:12,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [425523489] [2023-08-30 05:10:12,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [425523489] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 05:10:12,156 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 05:10:12,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-08-30 05:10:12,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736322777] [2023-08-30 05:10:12,157 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 05:10:12,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 05:10:12,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:10:12,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 05:10:12,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-30 05:10:13,171 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 328 out of 822 [2023-08-30 05:10:13,173 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 64 transitions, 156 flow. Second operand has 6 states, 6 states have (on average 329.0) internal successors, (1974), 6 states have internal predecessors, (1974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:10:13,173 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:10:13,173 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 328 of 822 [2023-08-30 05:10:13,174 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:10:14,746 INFO L130 PetriNetUnfolder]: 1029/1712 cut-off events. [2023-08-30 05:10:14,746 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 05:10:14,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3454 conditions, 1712 events. 1029/1712 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 8948 event pairs, 945 based on Foata normal form. 0/498 useless extension candidates. Maximal degree in co-relation 3446. Up to 1677 conditions per place. [2023-08-30 05:10:14,752 INFO L137 encePairwiseOnDemand]: 814/822 looper letters, 54 selfloop transitions, 18 changer transitions 0/76 dead transitions. [2023-08-30 05:10:14,753 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 76 transitions, 348 flow [2023-08-30 05:10:14,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 05:10:14,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 05:10:14,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 2046 transitions. [2023-08-30 05:10:14,757 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4148418491484185 [2023-08-30 05:10:14,757 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 2046 transitions. [2023-08-30 05:10:14,757 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 2046 transitions. [2023-08-30 05:10:14,758 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:10:14,758 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 2046 transitions. [2023-08-30 05:10:14,761 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 341.0) internal successors, (2046), 6 states have internal predecessors, (2046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:10:14,766 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 822.0) internal successors, (5754), 7 states have internal predecessors, (5754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:10:14,768 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 822.0) internal successors, (5754), 7 states have internal predecessors, (5754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:10:14,768 INFO L175 Difference]: Start difference. First operand has 61 places, 64 transitions, 156 flow. Second operand 6 states and 2046 transitions. [2023-08-30 05:10:14,768 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 76 transitions, 348 flow [2023-08-30 05:10:14,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 76 transitions, 347 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 05:10:14,781 INFO L231 Difference]: Finished difference. Result has 68 places, 76 transitions, 279 flow [2023-08-30 05:10:14,781 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=822, PETRI_DIFFERENCE_MINUEND_FLOW=155, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=279, PETRI_PLACES=68, PETRI_TRANSITIONS=76} [2023-08-30 05:10:14,782 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 0 predicate places. [2023-08-30 05:10:14,782 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 76 transitions, 279 flow [2023-08-30 05:10:14,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 329.0) internal successors, (1974), 6 states have internal predecessors, (1974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:10:14,783 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:10:14,783 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 05:10:14,793 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2023-08-30 05:10:14,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:10:14,990 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2023-08-30 05:10:14,990 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:10:14,991 INFO L85 PathProgramCache]: Analyzing trace with hash 45228781, now seen corresponding path program 1 times [2023-08-30 05:10:14,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:10:14,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1505160769] [2023-08-30 05:10:14,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:10:14,991 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:10:14,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:10:14,992 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 05:10:14,994 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-08-30 05:10:15,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:10:15,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-30 05:10:15,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:10:15,078 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 [2023-08-30 05:10:15,098 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 05:10:15,099 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 05:10:15,099 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:10:15,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1505160769] [2023-08-30 05:10:15,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1505160769] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:10:15,099 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 05:10:15,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 05:10:15,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41460799] [2023-08-30 05:10:15,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:10:15,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 05:10:15,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:10:15,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 05:10:15,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 05:10:15,552 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 336 out of 822 [2023-08-30 05:10:15,566 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 76 transitions, 279 flow. Second operand has 4 states, 4 states have (on average 337.0) internal successors, (1348), 4 states have internal predecessors, (1348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:10:15,566 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:10:15,566 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 336 of 822 [2023-08-30 05:10:15,566 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:10:16,047 INFO L130 PetriNetUnfolder]: 1030/1715 cut-off events. [2023-08-30 05:10:16,047 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-08-30 05:10:16,048 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3504 conditions, 1715 events. 1030/1715 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 9055 event pairs, 945 based on Foata normal form. 0/510 useless extension candidates. Maximal degree in co-relation 3492. Up to 1693 conditions per place. [2023-08-30 05:10:16,053 INFO L137 encePairwiseOnDemand]: 817/822 looper letters, 67 selfloop transitions, 8 changer transitions 0/79 dead transitions. [2023-08-30 05:10:16,053 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 79 transitions, 438 flow [2023-08-30 05:10:16,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 05:10:16,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 05:10:16,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1404 transitions. [2023-08-30 05:10:16,056 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42700729927007297 [2023-08-30 05:10:16,056 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1404 transitions. [2023-08-30 05:10:16,056 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1404 transitions. [2023-08-30 05:10:16,057 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:10:16,057 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1404 transitions. [2023-08-30 05:10:16,059 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 351.0) internal successors, (1404), 4 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:10:16,063 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 822.0) internal successors, (4110), 5 states have internal predecessors, (4110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:10:16,064 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 822.0) internal successors, (4110), 5 states have internal predecessors, (4110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:10:16,064 INFO L175 Difference]: Start difference. First operand has 68 places, 76 transitions, 279 flow. Second operand 4 states and 1404 transitions. [2023-08-30 05:10:16,064 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 79 transitions, 438 flow [2023-08-30 05:10:16,065 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 79 transitions, 412 flow, removed 9 selfloop flow, removed 1 redundant places. [2023-08-30 05:10:16,067 INFO L231 Difference]: Finished difference. Result has 71 places, 78 transitions, 289 flow [2023-08-30 05:10:16,067 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=822, PETRI_DIFFERENCE_MINUEND_FLOW=253, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=289, PETRI_PLACES=71, PETRI_TRANSITIONS=78} [2023-08-30 05:10:16,067 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 3 predicate places. [2023-08-30 05:10:16,067 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 78 transitions, 289 flow [2023-08-30 05:10:16,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 337.0) internal successors, (1348), 4 states have internal predecessors, (1348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:10:16,068 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:10:16,068 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 05:10:16,075 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Ended with exit code 0 [2023-08-30 05:10:16,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:10:16,276 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2023-08-30 05:10:16,276 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:10:16,276 INFO L85 PathProgramCache]: Analyzing trace with hash 45228782, now seen corresponding path program 1 times [2023-08-30 05:10:16,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:10:16,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1910759019] [2023-08-30 05:10:16,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:10:16,277 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:10:16,277 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:10:16,278 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 05:10:16,281 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2023-08-30 05:10:16,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:10:16,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 05:10:16,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:10:16,341 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 [2023-08-30 05:10:16,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 05:10:16,344 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 05:10:16,344 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:10:16,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1910759019] [2023-08-30 05:10:16,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1910759019] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:10:16,345 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 05:10:16,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 05:10:16,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041523558] [2023-08-30 05:10:16,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:10:16,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 05:10:16,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:10:16,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 05:10:16,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 05:10:16,491 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 340 out of 822 [2023-08-30 05:10:16,493 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 78 transitions, 289 flow. Second operand has 3 states, 3 states have (on average 341.3333333333333) internal successors, (1024), 3 states have internal predecessors, (1024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:10:16,493 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:10:16,493 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 340 of 822 [2023-08-30 05:10:16,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:10:16,867 INFO L130 PetriNetUnfolder]: 1030/1712 cut-off events. [2023-08-30 05:10:16,868 INFO L131 PetriNetUnfolder]: For 20/20 co-relation queries the response was YES. [2023-08-30 05:10:16,869 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3499 conditions, 1712 events. 1030/1712 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 9033 event pairs, 945 based on Foata normal form. 2/514 useless extension candidates. Maximal degree in co-relation 3485. Up to 1678 conditions per place. [2023-08-30 05:10:16,874 INFO L137 encePairwiseOnDemand]: 819/822 looper letters, 67 selfloop transitions, 5 changer transitions 0/76 dead transitions. [2023-08-30 05:10:16,874 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 76 transitions, 429 flow [2023-08-30 05:10:16,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 05:10:16,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 05:10:16,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1076 transitions. [2023-08-30 05:10:16,877 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43633414436334145 [2023-08-30 05:10:16,877 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1076 transitions. [2023-08-30 05:10:16,877 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1076 transitions. [2023-08-30 05:10:16,877 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:10:16,877 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1076 transitions. [2023-08-30 05:10:16,886 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 358.6666666666667) internal successors, (1076), 3 states have internal predecessors, (1076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:10:16,889 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 822.0) internal successors, (3288), 4 states have internal predecessors, (3288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:10:16,891 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 822.0) internal successors, (3288), 4 states have internal predecessors, (3288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:10:16,891 INFO L175 Difference]: Start difference. First operand has 71 places, 78 transitions, 289 flow. Second operand 3 states and 1076 transitions. [2023-08-30 05:10:16,891 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 76 transitions, 429 flow [2023-08-30 05:10:16,894 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 76 transitions, 418 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-30 05:10:16,895 INFO L231 Difference]: Finished difference. Result has 69 places, 76 transitions, 284 flow [2023-08-30 05:10:16,895 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=822, PETRI_DIFFERENCE_MINUEND_FLOW=274, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=284, PETRI_PLACES=69, PETRI_TRANSITIONS=76} [2023-08-30 05:10:16,897 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 1 predicate places. [2023-08-30 05:10:16,897 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 76 transitions, 284 flow [2023-08-30 05:10:16,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 341.3333333333333) internal successors, (1024), 3 states have internal predecessors, (1024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:10:16,898 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:10:16,898 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 05:10:16,904 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2023-08-30 05:10:17,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:10:17,105 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2023-08-30 05:10:17,105 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:10:17,105 INFO L85 PathProgramCache]: Analyzing trace with hash 1402097510, now seen corresponding path program 1 times [2023-08-30 05:10:17,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:10:17,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2140415028] [2023-08-30 05:10:17,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:10:17,106 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:10:17,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:10:17,113 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 05:10:17,115 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2023-08-30 05:10:17,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:10:17,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-30 05:10:17,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:10:17,223 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 05:10:17,223 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 05:10:17,224 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:10:17,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2140415028] [2023-08-30 05:10:17,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2140415028] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:10:17,224 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 05:10:17,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 05:10:17,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052932216] [2023-08-30 05:10:17,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:10:17,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 05:10:17,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:10:17,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 05:10:17,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 05:10:17,438 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 340 out of 822 [2023-08-30 05:10:17,439 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 76 transitions, 284 flow. Second operand has 3 states, 3 states have (on average 341.6666666666667) internal successors, (1025), 3 states have internal predecessors, (1025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:10:17,439 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:10:17,439 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 340 of 822 [2023-08-30 05:10:17,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:10:17,866 INFO L130 PetriNetUnfolder]: 1029/1711 cut-off events. [2023-08-30 05:10:17,866 INFO L131 PetriNetUnfolder]: For 21/21 co-relation queries the response was YES. [2023-08-30 05:10:17,867 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3497 conditions, 1711 events. 1029/1711 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 8946 event pairs, 945 based on Foata normal form. 1/512 useless extension candidates. Maximal degree in co-relation 3484. Up to 1695 conditions per place. [2023-08-30 05:10:17,872 INFO L137 encePairwiseOnDemand]: 819/822 looper letters, 69 selfloop transitions, 2 changer transitions 0/75 dead transitions. [2023-08-30 05:10:17,872 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 75 transitions, 422 flow [2023-08-30 05:10:17,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 05:10:17,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 05:10:17,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1076 transitions. [2023-08-30 05:10:17,876 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43633414436334145 [2023-08-30 05:10:17,876 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1076 transitions. [2023-08-30 05:10:17,876 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1076 transitions. [2023-08-30 05:10:17,877 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:10:17,877 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1076 transitions. [2023-08-30 05:10:17,879 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 358.6666666666667) internal successors, (1076), 3 states have internal predecessors, (1076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:10:17,881 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 822.0) internal successors, (3288), 4 states have internal predecessors, (3288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:10:17,882 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 822.0) internal successors, (3288), 4 states have internal predecessors, (3288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:10:17,882 INFO L175 Difference]: Start difference. First operand has 69 places, 76 transitions, 284 flow. Second operand 3 states and 1076 transitions. [2023-08-30 05:10:17,882 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 75 transitions, 422 flow [2023-08-30 05:10:17,883 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 75 transitions, 417 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 05:10:17,883 INFO L231 Difference]: Finished difference. Result has 70 places, 75 transitions, 279 flow [2023-08-30 05:10:17,884 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=822, PETRI_DIFFERENCE_MINUEND_FLOW=275, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=279, PETRI_PLACES=70, PETRI_TRANSITIONS=75} [2023-08-30 05:10:17,884 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 2 predicate places. [2023-08-30 05:10:17,884 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 75 transitions, 279 flow [2023-08-30 05:10:17,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 341.6666666666667) internal successors, (1025), 3 states have internal predecessors, (1025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:10:17,885 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:10:17,885 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 05:10:17,898 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2023-08-30 05:10:18,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:10:18,096 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2023-08-30 05:10:18,096 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:10:18,097 INFO L85 PathProgramCache]: Analyzing trace with hash 456930193, now seen corresponding path program 1 times [2023-08-30 05:10:18,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:10:18,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [634048182] [2023-08-30 05:10:18,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:10:18,097 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 [2023-08-30 05:10:18,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:10:18,098 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 05:10:18,099 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2023-08-30 05:10:18,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:10:18,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-30 05:10:18,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:10:18,200 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 5 [2023-08-30 05:10:18,238 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 05:10:18,238 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 05:10:18,408 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 05:10:18,408 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:10:18,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [634048182] [2023-08-30 05:10:18,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [634048182] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 05:10:18,410 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 05:10:18,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-08-30 05:10:18,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781830554] [2023-08-30 05:10:18,410 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 05:10:18,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 05:10:18,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:10:18,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 05:10:18,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-08-30 05:10:19,794 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 326 out of 822 [2023-08-30 05:10:19,795 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 75 transitions, 279 flow. Second operand has 7 states, 7 states have (on average 327.7142857142857) internal successors, (2294), 7 states have internal predecessors, (2294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:10:19,795 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:10:19,795 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 326 of 822 [2023-08-30 05:10:19,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:10:21,129 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 05:10:21,884 INFO L130 PetriNetUnfolder]: 1038/1725 cut-off events. [2023-08-30 05:10:21,884 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2023-08-30 05:10:21,886 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3539 conditions, 1725 events. 1038/1725 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 9175 event pairs, 945 based on Foata normal form. 0/519 useless extension candidates. Maximal degree in co-relation 3525. Up to 1678 conditions per place. [2023-08-30 05:10:21,890 INFO L137 encePairwiseOnDemand]: 812/822 looper letters, 63 selfloop transitions, 22 changer transitions 0/89 dead transitions. [2023-08-30 05:10:21,891 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 89 transitions, 498 flow [2023-08-30 05:10:21,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 05:10:21,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 05:10:21,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 2357 transitions. [2023-08-30 05:10:21,897 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40962808481056656 [2023-08-30 05:10:21,897 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 2357 transitions. [2023-08-30 05:10:21,897 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 2357 transitions. [2023-08-30 05:10:21,898 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:10:21,898 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 2357 transitions. [2023-08-30 05:10:21,901 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 336.7142857142857) internal successors, (2357), 7 states have internal predecessors, (2357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:10:21,906 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 822.0) internal successors, (6576), 8 states have internal predecessors, (6576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:10:21,907 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 822.0) internal successors, (6576), 8 states have internal predecessors, (6576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:10:21,907 INFO L175 Difference]: Start difference. First operand has 70 places, 75 transitions, 279 flow. Second operand 7 states and 2357 transitions. [2023-08-30 05:10:21,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 89 transitions, 498 flow [2023-08-30 05:10:21,908 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 89 transitions, 494 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-30 05:10:21,910 INFO L231 Difference]: Finished difference. Result has 78 places, 89 transitions, 414 flow [2023-08-30 05:10:21,910 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=822, PETRI_DIFFERENCE_MINUEND_FLOW=275, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=414, PETRI_PLACES=78, PETRI_TRANSITIONS=89} [2023-08-30 05:10:21,911 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 10 predicate places. [2023-08-30 05:10:21,911 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 89 transitions, 414 flow [2023-08-30 05:10:21,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 327.7142857142857) internal successors, (2294), 7 states have internal predecessors, (2294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:10:21,921 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:10:21,921 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 05:10:21,936 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2023-08-30 05:10:22,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:10:22,131 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2023-08-30 05:10:22,131 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:10:22,131 INFO L85 PathProgramCache]: Analyzing trace with hash 456932131, now seen corresponding path program 1 times [2023-08-30 05:10:22,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:10:22,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [891481678] [2023-08-30 05:10:22,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:10:22,132 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:10:22,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:10:22,133 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 05:10:22,133 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2023-08-30 05:10:22,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:10:22,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 05:10:22,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:10:22,314 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 05:10:22,315 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 05:10:22,408 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 05:10:22,408 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:10:22,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [891481678] [2023-08-30 05:10:22,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [891481678] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 05:10:22,408 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 05:10:22,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2023-08-30 05:10:22,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727900350] [2023-08-30 05:10:22,408 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 05:10:22,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 05:10:22,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:10:22,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 05:10:22,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2023-08-30 05:10:23,525 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 324 out of 822 [2023-08-30 05:10:23,527 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 89 transitions, 414 flow. Second operand has 10 states, 10 states have (on average 325.1) internal successors, (3251), 10 states have internal predecessors, (3251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:10:23,527 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:10:23,527 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 324 of 822 [2023-08-30 05:10:23,527 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:10:24,581 INFO L130 PetriNetUnfolder]: 2069/3437 cut-off events. [2023-08-30 05:10:24,581 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-08-30 05:10:24,584 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7096 conditions, 3437 events. 2069/3437 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 20531 event pairs, 1890 based on Foata normal form. 2/1038 useless extension candidates. Maximal degree in co-relation 7078. Up to 1698 conditions per place. [2023-08-30 05:10:24,591 INFO L137 encePairwiseOnDemand]: 814/822 looper letters, 137 selfloop transitions, 20 changer transitions 0/161 dead transitions. [2023-08-30 05:10:24,592 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 161 transitions, 1044 flow [2023-08-30 05:10:24,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 05:10:24,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 05:10:24,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 3027 transitions. [2023-08-30 05:10:24,597 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4091646390916464 [2023-08-30 05:10:24,598 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 3027 transitions. [2023-08-30 05:10:24,598 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 3027 transitions. [2023-08-30 05:10:24,599 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:10:24,599 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 3027 transitions. [2023-08-30 05:10:24,603 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 336.3333333333333) internal successors, (3027), 9 states have internal predecessors, (3027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:10:24,608 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 822.0) internal successors, (8220), 10 states have internal predecessors, (8220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:10:24,609 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 822.0) internal successors, (8220), 10 states have internal predecessors, (8220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:10:24,609 INFO L175 Difference]: Start difference. First operand has 78 places, 89 transitions, 414 flow. Second operand 9 states and 3027 transitions. [2023-08-30 05:10:24,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 161 transitions, 1044 flow [2023-08-30 05:10:24,610 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 161 transitions, 1003 flow, removed 14 selfloop flow, removed 2 redundant places. [2023-08-30 05:10:24,612 INFO L231 Difference]: Finished difference. Result has 84 places, 96 transitions, 492 flow [2023-08-30 05:10:24,612 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=822, PETRI_DIFFERENCE_MINUEND_FLOW=383, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=492, PETRI_PLACES=84, PETRI_TRANSITIONS=96} [2023-08-30 05:10:24,612 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 16 predicate places. [2023-08-30 05:10:24,613 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 96 transitions, 492 flow [2023-08-30 05:10:24,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 325.1) internal successors, (3251), 10 states have internal predecessors, (3251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:10:24,613 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:10:24,613 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-08-30 05:10:24,621 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2023-08-30 05:10:24,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:10:24,821 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2023-08-30 05:10:24,821 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:10:24,821 INFO L85 PathProgramCache]: Analyzing trace with hash 454982653, now seen corresponding path program 2 times [2023-08-30 05:10:24,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:10:24,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1562204845] [2023-08-30 05:10:24,821 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 05:10:24,822 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:10:24,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:10:24,822 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 05:10:24,825 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2023-08-30 05:10:24,886 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 05:10:24,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 05:10:24,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-30 05:10:24,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:10:24,933 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-30 05:10:24,934 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-30 05:10:25,054 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 05:10:25,054 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 05:10:25,442 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 05:10:25,442 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:10:25,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1562204845] [2023-08-30 05:10:25,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1562204845] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 05:10:25,442 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 05:10:25,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-30 05:10:25,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202331724] [2023-08-30 05:10:25,442 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 05:10:25,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 05:10:25,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:10:25,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 05:10:25,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-08-30 05:10:30,767 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 330 out of 822 [2023-08-30 05:10:30,770 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 96 transitions, 492 flow. Second operand has 12 states, 12 states have (on average 331.0) internal successors, (3972), 12 states have internal predecessors, (3972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:10:30,770 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:10:30,770 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 330 of 822 [2023-08-30 05:10:30,770 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:10:33,725 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 05:10:35,953 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 05:10:41,603 INFO L130 PetriNetUnfolder]: 2095/3495 cut-off events. [2023-08-30 05:10:41,603 INFO L131 PetriNetUnfolder]: For 244/244 co-relation queries the response was YES. [2023-08-30 05:10:41,605 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7376 conditions, 3495 events. 2095/3495 cut-off events. For 244/244 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 20904 event pairs, 1890 based on Foata normal form. 16/1104 useless extension candidates. Maximal degree in co-relation 7357. Up to 3378 conditions per place. [2023-08-30 05:10:41,615 INFO L137 encePairwiseOnDemand]: 814/822 looper letters, 76 selfloop transitions, 59 changer transitions 0/139 dead transitions. [2023-08-30 05:10:41,616 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 139 transitions, 1122 flow [2023-08-30 05:10:41,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-30 05:10:41,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-30 05:10:41,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 5058 transitions. [2023-08-30 05:10:41,625 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41021897810218977 [2023-08-30 05:10:41,625 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 5058 transitions. [2023-08-30 05:10:41,625 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 5058 transitions. [2023-08-30 05:10:41,626 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:10:41,627 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 5058 transitions. [2023-08-30 05:10:41,633 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 337.2) internal successors, (5058), 15 states have internal predecessors, (5058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:10:41,642 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 822.0) internal successors, (13152), 16 states have internal predecessors, (13152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:10:41,643 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 822.0) internal successors, (13152), 16 states have internal predecessors, (13152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:10:41,643 INFO L175 Difference]: Start difference. First operand has 84 places, 96 transitions, 492 flow. Second operand 15 states and 5058 transitions. [2023-08-30 05:10:41,644 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 139 transitions, 1122 flow [2023-08-30 05:10:41,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 139 transitions, 1117 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-30 05:10:41,647 INFO L231 Difference]: Finished difference. Result has 104 places, 130 transitions, 992 flow [2023-08-30 05:10:41,647 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=822, PETRI_DIFFERENCE_MINUEND_FLOW=487, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=992, PETRI_PLACES=104, PETRI_TRANSITIONS=130} [2023-08-30 05:10:41,648 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 36 predicate places. [2023-08-30 05:10:41,648 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 130 transitions, 992 flow [2023-08-30 05:10:41,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 331.0) internal successors, (3972), 12 states have internal predecessors, (3972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:10:41,649 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:10:41,649 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 05:10:41,659 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2023-08-30 05:10:41,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:10:41,857 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2023-08-30 05:10:41,857 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:10:41,857 INFO L85 PathProgramCache]: Analyzing trace with hash 1023477905, now seen corresponding path program 1 times [2023-08-30 05:10:41,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:10:41,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [369405780] [2023-08-30 05:10:41,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:10:41,858 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:10:41,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:10:41,858 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 05:10:41,861 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2023-08-30 05:10:41,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:10:41,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 05:10:41,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:10:41,972 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 05:10:41,972 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 05:10:41,972 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:10:41,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [369405780] [2023-08-30 05:10:41,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [369405780] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:10:41,973 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 05:10:41,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 05:10:41,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187960801] [2023-08-30 05:10:41,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:10:41,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 05:10:41,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:10:41,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 05:10:41,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 05:10:42,118 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 340 out of 822 [2023-08-30 05:10:42,118 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 130 transitions, 992 flow. Second operand has 4 states, 4 states have (on average 342.0) internal successors, (1368), 4 states have internal predecessors, (1368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:10:42,118 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:10:42,119 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 340 of 822 [2023-08-30 05:10:42,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:10:42,759 INFO L130 PetriNetUnfolder]: 2093/3493 cut-off events. [2023-08-30 05:10:42,759 INFO L131 PetriNetUnfolder]: For 401/401 co-relation queries the response was YES. [2023-08-30 05:10:42,762 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7520 conditions, 3493 events. 2093/3493 cut-off events. For 401/401 co-relation queries the response was YES. Maximal size of possible extension queue 322. Compared 20931 event pairs, 1890 based on Foata normal form. 2/1093 useless extension candidates. Maximal degree in co-relation 7493. Up to 3450 conditions per place. [2023-08-30 05:10:42,770 INFO L137 encePairwiseOnDemand]: 817/822 looper letters, 111 selfloop transitions, 13 changer transitions 0/128 dead transitions. [2023-08-30 05:10:42,770 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 128 transitions, 1210 flow [2023-08-30 05:10:42,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 05:10:42,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 05:10:42,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1417 transitions. [2023-08-30 05:10:42,773 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4309610705596107 [2023-08-30 05:10:42,773 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1417 transitions. [2023-08-30 05:10:42,773 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1417 transitions. [2023-08-30 05:10:42,774 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:10:42,774 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1417 transitions. [2023-08-30 05:10:42,776 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 354.25) internal successors, (1417), 4 states have internal predecessors, (1417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:10:42,779 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 822.0) internal successors, (4110), 5 states have internal predecessors, (4110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:10:42,780 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 822.0) internal successors, (4110), 5 states have internal predecessors, (4110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:10:42,780 INFO L175 Difference]: Start difference. First operand has 104 places, 130 transitions, 992 flow. Second operand 4 states and 1417 transitions. [2023-08-30 05:10:42,780 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 128 transitions, 1210 flow [2023-08-30 05:10:42,783 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 128 transitions, 1076 flow, removed 38 selfloop flow, removed 4 redundant places. [2023-08-30 05:10:42,785 INFO L231 Difference]: Finished difference. Result has 103 places, 128 transitions, 854 flow [2023-08-30 05:10:42,786 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=822, PETRI_DIFFERENCE_MINUEND_FLOW=828, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=854, PETRI_PLACES=103, PETRI_TRANSITIONS=128} [2023-08-30 05:10:42,786 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 35 predicate places. [2023-08-30 05:10:42,786 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 128 transitions, 854 flow [2023-08-30 05:10:42,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 342.0) internal successors, (1368), 4 states have internal predecessors, (1368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:10:42,787 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:10:42,787 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 05:10:42,796 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Ended with exit code 0 [2023-08-30 05:10:42,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:10:42,994 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2023-08-30 05:10:42,995 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:10:42,995 INFO L85 PathProgramCache]: Analyzing trace with hash 110745844, now seen corresponding path program 1 times [2023-08-30 05:10:42,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:10:42,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [286584375] [2023-08-30 05:10:42,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:10:42,995 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:10:42,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:10:42,996 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 05:10:42,998 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2023-08-30 05:10:43,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:10:43,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-30 05:10:43,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:10:43,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 05:10:43,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 05:10:43,176 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-08-30 05:10:43,176 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 [2023-08-30 05:10:43,195 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-08-30 05:10:43,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 05:10:43,244 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 [2023-08-30 05:10:43,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 05:10:43,282 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 [2023-08-30 05:10:43,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 05:10:43,326 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 [2023-08-30 05:10:43,362 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 05:10:43,362 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 05:10:43,362 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:10:43,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [286584375] [2023-08-30 05:10:43,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [286584375] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:10:43,363 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 05:10:43,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 05:10:43,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059431991] [2023-08-30 05:10:43,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:10:43,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 05:10:43,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:10:43,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 05:10:43,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 05:10:43,699 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 341 out of 822 [2023-08-30 05:10:43,700 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 128 transitions, 854 flow. Second operand has 4 states, 4 states have (on average 343.25) internal successors, (1373), 4 states have internal predecessors, (1373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:10:43,700 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:10:43,700 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 341 of 822 [2023-08-30 05:10:43,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:10:44,249 INFO L130 PetriNetUnfolder]: 1563/2689 cut-off events. [2023-08-30 05:10:44,250 INFO L131 PetriNetUnfolder]: For 513/513 co-relation queries the response was YES. [2023-08-30 05:10:44,252 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5831 conditions, 2689 events. 1563/2689 cut-off events. For 513/513 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 15828 event pairs, 1396 based on Foata normal form. 0/963 useless extension candidates. Maximal degree in co-relation 5803. Up to 2657 conditions per place. [2023-08-30 05:10:44,257 INFO L137 encePairwiseOnDemand]: 819/822 looper letters, 119 selfloop transitions, 1 changer transitions 0/124 dead transitions. [2023-08-30 05:10:44,257 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 124 transitions, 1077 flow [2023-08-30 05:10:44,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 05:10:44,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 05:10:44,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1077 transitions. [2023-08-30 05:10:44,260 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4367396593673966 [2023-08-30 05:10:44,260 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1077 transitions. [2023-08-30 05:10:44,260 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1077 transitions. [2023-08-30 05:10:44,260 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:10:44,260 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1077 transitions. [2023-08-30 05:10:44,262 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 359.0) internal successors, (1077), 3 states have internal predecessors, (1077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:10:44,264 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 822.0) internal successors, (3288), 4 states have internal predecessors, (3288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:10:44,264 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 822.0) internal successors, (3288), 4 states have internal predecessors, (3288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:10:44,264 INFO L175 Difference]: Start difference. First operand has 103 places, 128 transitions, 854 flow. Second operand 3 states and 1077 transitions. [2023-08-30 05:10:44,264 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 124 transitions, 1077 flow [2023-08-30 05:10:44,267 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 124 transitions, 1063 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 05:10:44,269 INFO L231 Difference]: Finished difference. Result has 101 places, 124 transitions, 825 flow [2023-08-30 05:10:44,269 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=822, PETRI_DIFFERENCE_MINUEND_FLOW=823, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=825, PETRI_PLACES=101, PETRI_TRANSITIONS=124} [2023-08-30 05:10:44,269 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 33 predicate places. [2023-08-30 05:10:44,269 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 124 transitions, 825 flow [2023-08-30 05:10:44,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 343.25) internal successors, (1373), 4 states have internal predecessors, (1373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:10:44,270 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:10:44,270 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 05:10:44,296 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Ended with exit code 0 [2023-08-30 05:10:44,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:10:44,478 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2023-08-30 05:10:44,478 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:10:44,478 INFO L85 PathProgramCache]: Analyzing trace with hash 110745843, now seen corresponding path program 1 times [2023-08-30 05:10:44,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:10:44,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [380431226] [2023-08-30 05:10:44,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:10:44,479 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:10:44,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:10:44,489 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 05:10:44,501 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2023-08-30 05:10:44,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:10:44,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-30 05:10:44,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:10:44,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 05:10:44,699 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2023-08-30 05:10:44,699 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 [2023-08-30 05:10:44,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 05:10:44,731 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 20 [2023-08-30 05:10:44,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 05:10:44,755 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 20 [2023-08-30 05:10:44,787 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-08-30 05:10:44,788 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 [2023-08-30 05:10:44,808 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 05:10:44,808 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 05:10:44,808 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:10:44,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [380431226] [2023-08-30 05:10:44,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [380431226] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:10:44,808 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 05:10:44,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 05:10:44,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851086748] [2023-08-30 05:10:44,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:10:44,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 05:10:44,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:10:44,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 05:10:44,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 05:10:45,075 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 343 out of 822 [2023-08-30 05:10:45,077 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 124 transitions, 825 flow. Second operand has 4 states, 4 states have (on average 345.25) internal successors, (1381), 4 states have internal predecessors, (1381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:10:45,077 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:10:45,077 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 343 of 822 [2023-08-30 05:10:45,077 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:10:45,510 INFO L130 PetriNetUnfolder]: 1033/1885 cut-off events. [2023-08-30 05:10:45,510 INFO L131 PetriNetUnfolder]: For 513/513 co-relation queries the response was YES. [2023-08-30 05:10:45,512 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4205 conditions, 1885 events. 1033/1885 cut-off events. For 513/513 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 10853 event pairs, 902 based on Foata normal form. 0/833 useless extension candidates. Maximal degree in co-relation 4177. Up to 1853 conditions per place. [2023-08-30 05:10:45,515 INFO L137 encePairwiseOnDemand]: 819/822 looper letters, 115 selfloop transitions, 1 changer transitions 0/120 dead transitions. [2023-08-30 05:10:45,515 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 120 transitions, 1040 flow [2023-08-30 05:10:45,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 05:10:45,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 05:10:45,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1081 transitions. [2023-08-30 05:10:45,518 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4383617193836172 [2023-08-30 05:10:45,518 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1081 transitions. [2023-08-30 05:10:45,518 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1081 transitions. [2023-08-30 05:10:45,518 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:10:45,518 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1081 transitions. [2023-08-30 05:10:45,520 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 360.3333333333333) internal successors, (1081), 3 states have internal predecessors, (1081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:10:45,521 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 822.0) internal successors, (3288), 4 states have internal predecessors, (3288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:10:45,522 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 822.0) internal successors, (3288), 4 states have internal predecessors, (3288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:10:45,522 INFO L175 Difference]: Start difference. First operand has 101 places, 124 transitions, 825 flow. Second operand 3 states and 1081 transitions. [2023-08-30 05:10:45,522 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 120 transitions, 1040 flow [2023-08-30 05:10:45,525 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 120 transitions, 1039 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 05:10:45,526 INFO L231 Difference]: Finished difference. Result has 100 places, 120 transitions, 809 flow [2023-08-30 05:10:45,526 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=822, PETRI_DIFFERENCE_MINUEND_FLOW=807, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=809, PETRI_PLACES=100, PETRI_TRANSITIONS=120} [2023-08-30 05:10:45,527 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 32 predicate places. [2023-08-30 05:10:45,527 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 120 transitions, 809 flow [2023-08-30 05:10:45,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 345.25) internal successors, (1381), 4 states have internal predecessors, (1381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:10:45,527 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:10:45,527 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 05:10:45,535 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 (13)] Ended with exit code 0 [2023-08-30 05:10:45,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:10:45,735 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2023-08-30 05:10:45,736 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:10:45,736 INFO L85 PathProgramCache]: Analyzing trace with hash -861844025, now seen corresponding path program 1 times [2023-08-30 05:10:45,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:10:45,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [292794887] [2023-08-30 05:10:45,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:10:45,736 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:10:45,737 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:10:45,742 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 05:10:45,743 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2023-08-30 05:10:45,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:10:45,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-30 05:10:45,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:10:45,895 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 [2023-08-30 05:10:45,942 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 05:10:45,942 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 05:10:46,345 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 05:10:46,346 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:10:46,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [292794887] [2023-08-30 05:10:46,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [292794887] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 05:10:46,346 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 05:10:46,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2023-08-30 05:10:46,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514420142] [2023-08-30 05:10:46,347 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 05:10:46,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-30 05:10:46,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:10:46,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-30 05:10:46,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2023-08-30 05:10:52,142 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 318 out of 822 [2023-08-30 05:10:52,144 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 120 transitions, 809 flow. Second operand has 13 states, 13 states have (on average 319.38461538461536) internal successors, (4152), 13 states have internal predecessors, (4152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:10:52,144 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:10:52,144 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 318 of 822 [2023-08-30 05:10:52,145 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:10:54,171 INFO L130 PetriNetUnfolder]: 3003/5435 cut-off events. [2023-08-30 05:10:54,171 INFO L131 PetriNetUnfolder]: For 541/541 co-relation queries the response was YES. [2023-08-30 05:10:54,177 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11398 conditions, 5435 events. 3003/5435 cut-off events. For 541/541 co-relation queries the response was YES. Maximal size of possible extension queue 453. Compared 38778 event pairs, 2706 based on Foata normal form. 2/2281 useless extension candidates. Maximal degree in co-relation 11369. Up to 1834 conditions per place. [2023-08-30 05:10:54,185 INFO L137 encePairwiseOnDemand]: 813/822 looper letters, 182 selfloop transitions, 23 changer transitions 0/209 dead transitions. [2023-08-30 05:10:54,185 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 209 transitions, 1491 flow [2023-08-30 05:10:54,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 05:10:54,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 05:10:54,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2679 transitions. [2023-08-30 05:10:54,190 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4073905109489051 [2023-08-30 05:10:54,190 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2679 transitions. [2023-08-30 05:10:54,190 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2679 transitions. [2023-08-30 05:10:54,191 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:10:54,191 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2679 transitions. [2023-08-30 05:10:54,194 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 334.875) internal successors, (2679), 8 states have internal predecessors, (2679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:10:54,198 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 822.0) internal successors, (7398), 9 states have internal predecessors, (7398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:10:54,198 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 822.0) internal successors, (7398), 9 states have internal predecessors, (7398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:10:54,198 INFO L175 Difference]: Start difference. First operand has 100 places, 120 transitions, 809 flow. Second operand 8 states and 2679 transitions. [2023-08-30 05:10:54,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 209 transitions, 1491 flow [2023-08-30 05:10:54,202 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 209 transitions, 1490 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 05:10:54,203 INFO L231 Difference]: Finished difference. Result has 109 places, 125 transitions, 927 flow [2023-08-30 05:10:54,204 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=822, PETRI_DIFFERENCE_MINUEND_FLOW=808, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=927, PETRI_PLACES=109, PETRI_TRANSITIONS=125} [2023-08-30 05:10:54,204 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 41 predicate places. [2023-08-30 05:10:54,204 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 125 transitions, 927 flow [2023-08-30 05:10:54,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 319.38461538461536) internal successors, (4152), 13 states have internal predecessors, (4152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:10:54,205 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:10:54,205 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 05:10:54,213 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2023-08-30 05:10:54,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:10:54,413 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2023-08-30 05:10:54,413 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:10:54,413 INFO L85 PathProgramCache]: Analyzing trace with hash -861886181, now seen corresponding path program 1 times [2023-08-30 05:10:54,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:10:54,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1898092640] [2023-08-30 05:10:54,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:10:54,414 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:10:54,414 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:10:54,415 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 05:10:54,417 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2023-08-30 05:10:54,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:10:54,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-30 05:10:54,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:10:54,590 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 05:10:54,590 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 05:10:54,698 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 05:10:54,698 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:10:54,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1898092640] [2023-08-30 05:10:54,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1898092640] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 05:10:54,698 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 05:10:54,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2023-08-30 05:10:54,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929991418] [2023-08-30 05:10:54,699 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 05:10:54,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 05:10:54,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:10:54,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 05:10:54,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2023-08-30 05:10:55,984 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 324 out of 822 [2023-08-30 05:10:55,986 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 125 transitions, 927 flow. Second operand has 12 states, 12 states have (on average 325.4166666666667) internal successors, (3905), 12 states have internal predecessors, (3905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:10:55,986 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:10:55,986 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 324 of 822 [2023-08-30 05:10:55,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:10:57,169 INFO L130 PetriNetUnfolder]: 2019/3669 cut-off events. [2023-08-30 05:10:57,169 INFO L131 PetriNetUnfolder]: For 686/686 co-relation queries the response was YES. [2023-08-30 05:10:57,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7916 conditions, 3669 events. 2019/3669 cut-off events. For 686/686 co-relation queries the response was YES. Maximal size of possible extension queue 305. Compared 24150 event pairs, 1804 based on Foata normal form. 4/1569 useless extension candidates. Maximal degree in co-relation 7883. Up to 1815 conditions per place. [2023-08-30 05:10:57,180 INFO L137 encePairwiseOnDemand]: 813/822 looper letters, 131 selfloop transitions, 35 changer transitions 0/170 dead transitions. [2023-08-30 05:10:57,180 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 170 transitions, 1396 flow [2023-08-30 05:10:57,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 05:10:57,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 05:10:57,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 3014 transitions. [2023-08-30 05:10:57,185 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4074074074074074 [2023-08-30 05:10:57,185 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 3014 transitions. [2023-08-30 05:10:57,185 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 3014 transitions. [2023-08-30 05:10:57,186 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:10:57,186 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 3014 transitions. [2023-08-30 05:10:57,190 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 334.8888888888889) internal successors, (3014), 9 states have internal predecessors, (3014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:10:57,194 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 822.0) internal successors, (8220), 10 states have internal predecessors, (8220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:10:57,194 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 822.0) internal successors, (8220), 10 states have internal predecessors, (8220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:10:57,195 INFO L175 Difference]: Start difference. First operand has 109 places, 125 transitions, 927 flow. Second operand 9 states and 3014 transitions. [2023-08-30 05:10:57,195 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 170 transitions, 1396 flow [2023-08-30 05:10:57,199 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 170 transitions, 1366 flow, removed 3 selfloop flow, removed 3 redundant places. [2023-08-30 05:10:57,201 INFO L231 Difference]: Finished difference. Result has 114 places, 126 transitions, 987 flow [2023-08-30 05:10:57,201 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=822, PETRI_DIFFERENCE_MINUEND_FLOW=893, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=987, PETRI_PLACES=114, PETRI_TRANSITIONS=126} [2023-08-30 05:10:57,201 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 46 predicate places. [2023-08-30 05:10:57,201 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 126 transitions, 987 flow [2023-08-30 05:10:57,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 325.4166666666667) internal successors, (3905), 12 states have internal predecessors, (3905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:10:57,202 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:10:57,202 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2023-08-30 05:10:57,210 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2023-08-30 05:10:57,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:10:57,410 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2023-08-30 05:10:57,410 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:10:57,410 INFO L85 PathProgramCache]: Analyzing trace with hash -863609600, now seen corresponding path program 1 times [2023-08-30 05:10:57,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:10:57,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [690457057] [2023-08-30 05:10:57,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:10:57,411 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:10:57,411 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:10:57,412 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 05:10:57,413 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2023-08-30 05:10:57,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:10:57,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-30 05:10:57,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:10:57,558 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 [2023-08-30 05:10:57,647 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 05:10:57,647 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 05:10:58,230 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 05:10:58,231 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:10:58,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [690457057] [2023-08-30 05:10:58,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [690457057] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 05:10:58,231 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 05:10:58,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2023-08-30 05:10:58,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263610445] [2023-08-30 05:10:58,231 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 05:10:58,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-30 05:10:58,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:10:58,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-30 05:10:58,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2023-08-30 05:11:08,731 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 318 out of 822 [2023-08-30 05:11:08,734 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 126 transitions, 987 flow. Second operand has 17 states, 17 states have (on average 319.1764705882353) internal successors, (5426), 17 states have internal predecessors, (5426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:11:08,734 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:11:08,734 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 318 of 822 [2023-08-30 05:11:08,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:11:11,904 INFO L130 PetriNetUnfolder]: 3014/5474 cut-off events. [2023-08-30 05:11:11,904 INFO L131 PetriNetUnfolder]: For 1162/1162 co-relation queries the response was YES. [2023-08-30 05:11:11,910 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11732 conditions, 5474 events. 3014/5474 cut-off events. For 1162/1162 co-relation queries the response was YES. Maximal size of possible extension queue 419. Compared 38132 event pairs, 2706 based on Foata normal form. 6/2324 useless extension candidates. Maximal degree in co-relation 11699. Up to 1805 conditions per place. [2023-08-30 05:11:11,918 INFO L137 encePairwiseOnDemand]: 813/822 looper letters, 216 selfloop transitions, 51 changer transitions 0/271 dead transitions. [2023-08-30 05:11:11,918 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 271 transitions, 2391 flow [2023-08-30 05:11:11,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-30 05:11:11,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-30 05:11:11,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 4929 transitions. [2023-08-30 05:11:11,924 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3997566909975669 [2023-08-30 05:11:11,924 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 4929 transitions. [2023-08-30 05:11:11,924 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 4929 transitions. [2023-08-30 05:11:11,926 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:11:11,926 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 4929 transitions. [2023-08-30 05:11:11,931 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 328.6) internal successors, (4929), 15 states have internal predecessors, (4929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:11:11,937 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 822.0) internal successors, (13152), 16 states have internal predecessors, (13152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:11:11,937 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 822.0) internal successors, (13152), 16 states have internal predecessors, (13152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:11:11,938 INFO L175 Difference]: Start difference. First operand has 114 places, 126 transitions, 987 flow. Second operand 15 states and 4929 transitions. [2023-08-30 05:11:11,938 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 271 transitions, 2391 flow [2023-08-30 05:11:11,943 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 271 transitions, 2303 flow, removed 13 selfloop flow, removed 6 redundant places. [2023-08-30 05:11:11,946 INFO L231 Difference]: Finished difference. Result has 130 places, 155 transitions, 1527 flow [2023-08-30 05:11:11,946 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=822, PETRI_DIFFERENCE_MINUEND_FLOW=917, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1527, PETRI_PLACES=130, PETRI_TRANSITIONS=155} [2023-08-30 05:11:11,946 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 62 predicate places. [2023-08-30 05:11:11,946 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 155 transitions, 1527 flow [2023-08-30 05:11:11,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 319.1764705882353) internal successors, (5426), 17 states have internal predecessors, (5426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:11:11,947 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:11:11,947 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 05:11:11,955 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2023-08-30 05:11:12,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:11:12,148 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2023-08-30 05:11:12,148 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:11:12,148 INFO L85 PathProgramCache]: Analyzing trace with hash -947396707, now seen corresponding path program 1 times [2023-08-30 05:11:12,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:11:12,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [374206382] [2023-08-30 05:11:12,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:11:12,149 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:11:12,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:11:12,149 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 05:11:12,150 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2023-08-30 05:11:12,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:11:12,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 26 conjunts are in the unsatisfiable core [2023-08-30 05:11:12,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:11:12,342 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-30 05:11:12,343 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-30 05:11:12,384 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-08-30 05:11:12,385 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2023-08-30 05:11:12,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 05:11:12,479 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 16 treesize of output 18 [2023-08-30 05:11:12,500 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-08-30 05:11:12,501 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2023-08-30 05:11:12,581 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-08-30 05:11:12,581 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2023-08-30 05:11:12,588 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 16 treesize of output 18 [2023-08-30 05:11:12,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 05:11:12,633 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 16 treesize of output 18 [2023-08-30 05:11:12,640 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-30 05:11:12,640 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 [2023-08-30 05:11:12,710 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 05:11:12,711 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 05:11:21,085 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 05:11:21,085 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:11:21,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [374206382] [2023-08-30 05:11:21,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [374206382] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 05:11:21,085 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 05:11:21,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 9 [2023-08-30 05:11:21,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485911379] [2023-08-30 05:11:21,086 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 05:11:21,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-30 05:11:21,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:11:21,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-30 05:11:21,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=80, Unknown=1, NotChecked=0, Total=110 [2023-08-30 05:11:23,233 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 05:11:25,665 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 05:11:27,937 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 05:11:30,270 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 05:11:32,412 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 05:11:34,482 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 05:11:37,066 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 05:11:39,334 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.68s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 05:11:41,545 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 05:11:44,882 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 05:11:48,227 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 05:11:50,818 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 05:11:52,937 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 05:11:55,693 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 05:11:58,970 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 05:12:01,158 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 05:12:04,137 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 05:12:06,275 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 05:12:08,420 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 05:12:12,560 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 05:12:17,847 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 05:12:20,451 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 05:12:22,799 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 05:12:24,957 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 05:12:27,803 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 05:12:30,045 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.92s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 05:12:32,961 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 05:12:35,146 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 05:12:37,438 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 05:12:40,342 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 05:12:42,745 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 05:12:44,911 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 05:12:47,268 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 05:12:49,999 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 05:12:50,314 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 245 out of 822 [2023-08-30 05:12:50,315 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 155 transitions, 1527 flow. Second operand has 11 states, 11 states have (on average 247.0) internal successors, (2717), 11 states have internal predecessors, (2717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:12:50,315 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:12:50,315 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 245 of 822 [2023-08-30 05:12:50,315 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:13:02,144 WARN L222 SmtUtils]: Spent 11.12s on a formula simplification. DAG size of input: 56 DAG size of output: 55 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 05:13:08,422 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 05:13:14,580 WARN L222 SmtUtils]: Spent 5.10s on a formula simplification. DAG size of input: 73 DAG size of output: 71 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 05:13:17,807 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.79s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 05:13:25,048 INFO L130 PetriNetUnfolder]: 2866/5222 cut-off events. [2023-08-30 05:13:25,048 INFO L131 PetriNetUnfolder]: For 1486/1486 co-relation queries the response was YES. [2023-08-30 05:13:25,055 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11436 conditions, 5222 events. 2866/5222 cut-off events. For 1486/1486 co-relation queries the response was YES. Maximal size of possible extension queue 403. Compared 36421 event pairs, 2126 based on Foata normal form. 0/2298 useless extension candidates. Maximal degree in co-relation 11396. Up to 3382 conditions per place. [2023-08-30 05:13:25,062 INFO L137 encePairwiseOnDemand]: 801/822 looper letters, 231 selfloop transitions, 52 changer transitions 0/283 dead transitions. [2023-08-30 05:13:25,062 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 283 transitions, 2614 flow [2023-08-30 05:13:25,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-30 05:13:25,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-30 05:13:25,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 3617 transitions. [2023-08-30 05:13:25,068 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31430309350017377 [2023-08-30 05:13:25,068 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 3617 transitions. [2023-08-30 05:13:25,068 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 3617 transitions. [2023-08-30 05:13:25,069 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:13:25,069 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 3617 transitions. [2023-08-30 05:13:25,072 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 258.35714285714283) internal successors, (3617), 14 states have internal predecessors, (3617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:13:25,078 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 822.0) internal successors, (12330), 15 states have internal predecessors, (12330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:13:25,078 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 822.0) internal successors, (12330), 15 states have internal predecessors, (12330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:13:25,078 INFO L175 Difference]: Start difference. First operand has 130 places, 155 transitions, 1527 flow. Second operand 14 states and 3617 transitions. [2023-08-30 05:13:25,078 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 283 transitions, 2614 flow [2023-08-30 05:13:25,085 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 283 transitions, 2573 flow, removed 12 selfloop flow, removed 3 redundant places. [2023-08-30 05:13:25,088 INFO L231 Difference]: Finished difference. Result has 143 places, 164 transitions, 1733 flow [2023-08-30 05:13:25,088 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=822, PETRI_DIFFERENCE_MINUEND_FLOW=1483, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1733, PETRI_PLACES=143, PETRI_TRANSITIONS=164} [2023-08-30 05:13:25,088 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 75 predicate places. [2023-08-30 05:13:25,089 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 164 transitions, 1733 flow [2023-08-30 05:13:25,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 247.0) internal successors, (2717), 11 states have internal predecessors, (2717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:13:25,089 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:13:25,089 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 05:13:25,113 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2023-08-30 05:13:25,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:13:25,297 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2023-08-30 05:13:25,298 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:13:25,298 INFO L85 PathProgramCache]: Analyzing trace with hash -947396254, now seen corresponding path program 1 times [2023-08-30 05:13:25,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:13:25,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2141543317] [2023-08-30 05:13:25,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:13:25,298 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:13:25,299 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:13:25,300 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 05:13:25,301 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2023-08-30 05:13:25,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:13:25,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 37 conjunts are in the unsatisfiable core [2023-08-30 05:13:25,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:13:25,541 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 [2023-08-30 05:13:25,550 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 [2023-08-30 05:13:25,673 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-08-30 05:13:25,674 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2023-08-30 05:13:25,682 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 16 treesize of output 18 [2023-08-30 05:13:25,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 05:13:25,782 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 16 treesize of output 18 [2023-08-30 05:13:25,795 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-30 05:13:25,795 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 [2023-08-30 05:13:26,030 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 05:13:26,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 05:13:33,433 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 05:13:33,433 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 05:13:33,439 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 05:13:33,439 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:13:33,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2141543317] [2023-08-30 05:13:33,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2141543317] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 05:13:33,440 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 05:13:33,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 15 [2023-08-30 05:13:33,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147366029] [2023-08-30 05:13:33,440 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 05:13:33,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-30 05:13:33,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:13:33,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-30 05:13:33,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2023-08-30 05:13:46,245 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 294 out of 822 [2023-08-30 05:13:46,247 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 164 transitions, 1733 flow. Second operand has 16 states, 16 states have (on average 295.375) internal successors, (4726), 16 states have internal predecessors, (4726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:13:46,247 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:13:46,247 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 294 of 822 [2023-08-30 05:13:46,247 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:13:56,448 WARN L222 SmtUtils]: Spent 10.04s on a formula simplification. DAG size of input: 53 DAG size of output: 50 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 05:14:04,338 WARN L222 SmtUtils]: Spent 5.98s on a formula simplification. DAG size of input: 66 DAG size of output: 65 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 05:14:27,029 WARN L222 SmtUtils]: Spent 18.85s on a formula simplification. DAG size of input: 76 DAG size of output: 75 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 05:14:47,390 WARN L222 SmtUtils]: Spent 19.74s on a formula simplification. DAG size of input: 73 DAG size of output: 72 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 05:14:54,847 WARN L222 SmtUtils]: Spent 5.53s on a formula simplification. DAG size of input: 68 DAG size of output: 64 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 05:15:01,310 INFO L130 PetriNetUnfolder]: 2704/5066 cut-off events. [2023-08-30 05:15:01,310 INFO L131 PetriNetUnfolder]: For 2494/2562 co-relation queries the response was YES. [2023-08-30 05:15:01,318 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12863 conditions, 5066 events. 2704/5066 cut-off events. For 2494/2562 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 36755 event pairs, 1466 based on Foata normal form. 26/2640 useless extension candidates. Maximal degree in co-relation 12817. Up to 2348 conditions per place. [2023-08-30 05:15:01,326 INFO L137 encePairwiseOnDemand]: 794/822 looper letters, 199 selfloop transitions, 99 changer transitions 0/300 dead transitions. [2023-08-30 05:15:01,326 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 300 transitions, 2872 flow [2023-08-30 05:15:01,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-30 05:15:01,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-30 05:15:01,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 5774 transitions. [2023-08-30 05:15:01,332 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3697016263285952 [2023-08-30 05:15:01,332 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 5774 transitions. [2023-08-30 05:15:01,333 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 5774 transitions. [2023-08-30 05:15:01,333 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:15:01,334 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 5774 transitions. [2023-08-30 05:15:01,338 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 303.89473684210526) internal successors, (5774), 19 states have internal predecessors, (5774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:15:01,345 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 822.0) internal successors, (16440), 20 states have internal predecessors, (16440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:15:01,346 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 822.0) internal successors, (16440), 20 states have internal predecessors, (16440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:15:01,346 INFO L175 Difference]: Start difference. First operand has 143 places, 164 transitions, 1733 flow. Second operand 19 states and 5774 transitions. [2023-08-30 05:15:01,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 300 transitions, 2872 flow [2023-08-30 05:15:01,355 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 300 transitions, 2762 flow, removed 13 selfloop flow, removed 8 redundant places. [2023-08-30 05:15:01,358 INFO L231 Difference]: Finished difference. Result has 160 places, 198 transitions, 2221 flow [2023-08-30 05:15:01,358 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=822, PETRI_DIFFERENCE_MINUEND_FLOW=1624, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=2221, PETRI_PLACES=160, PETRI_TRANSITIONS=198} [2023-08-30 05:15:01,358 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 92 predicate places. [2023-08-30 05:15:01,358 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 198 transitions, 2221 flow [2023-08-30 05:15:01,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 295.375) internal successors, (4726), 16 states have internal predecessors, (4726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:15:01,359 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:15:01,359 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 05:15:01,369 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2023-08-30 05:15:01,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:15:01,567 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2023-08-30 05:15:01,567 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:15:01,567 INFO L85 PathProgramCache]: Analyzing trace with hash -947396284, now seen corresponding path program 1 times [2023-08-30 05:15:01,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:15:01,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [412434877] [2023-08-30 05:15:01,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:15:01,568 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:15:01,568 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:15:01,568 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 05:15:01,570 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2023-08-30 05:15:01,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:15:01,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-30 05:15:01,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:15:01,800 INFO L321 Elim1Store]: treesize reduction 50, result has 23.1 percent of original size [2023-08-30 05:15:01,800 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 [2023-08-30 05:15:01,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 05:15:01,867 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 20 [2023-08-30 05:15:01,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 05:15:01,903 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 20 [2023-08-30 05:15:01,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 05:15:01,929 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 20 [2023-08-30 05:15:01,994 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 05:15:01,994 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 05:15:01,994 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:15:01,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [412434877] [2023-08-30 05:15:01,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [412434877] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:15:01,994 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 05:15:01,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 05:15:01,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862219668] [2023-08-30 05:15:01,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:15:01,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 05:15:01,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:15:01,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 05:15:01,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 05:15:02,459 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 336 out of 822 [2023-08-30 05:15:02,460 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 198 transitions, 2221 flow. Second operand has 5 states, 5 states have (on average 338.2) internal successors, (1691), 5 states have internal predecessors, (1691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:15:02,460 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:15:02,460 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 336 of 822 [2023-08-30 05:15:02,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:15:03,734 INFO L130 PetriNetUnfolder]: 2297/4397 cut-off events. [2023-08-30 05:15:03,734 INFO L131 PetriNetUnfolder]: For 5235/5387 co-relation queries the response was YES. [2023-08-30 05:15:03,742 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15177 conditions, 4397 events. 2297/4397 cut-off events. For 5235/5387 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 32627 event pairs, 1413 based on Foata normal form. 5/2538 useless extension candidates. Maximal degree in co-relation 15124. Up to 4300 conditions per place. [2023-08-30 05:15:03,749 INFO L137 encePairwiseOnDemand]: 819/822 looper letters, 190 selfloop transitions, 1 changer transitions 0/196 dead transitions. [2023-08-30 05:15:03,749 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 196 transitions, 2599 flow [2023-08-30 05:15:03,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 05:15:03,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 05:15:03,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1055 transitions. [2023-08-30 05:15:03,752 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4278183292781833 [2023-08-30 05:15:03,752 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1055 transitions. [2023-08-30 05:15:03,752 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1055 transitions. [2023-08-30 05:15:03,752 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:15:03,752 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1055 transitions. [2023-08-30 05:15:03,753 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 351.6666666666667) internal successors, (1055), 3 states have internal predecessors, (1055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:15:03,754 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 822.0) internal successors, (3288), 4 states have internal predecessors, (3288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:15:03,754 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 822.0) internal successors, (3288), 4 states have internal predecessors, (3288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:15:03,754 INFO L175 Difference]: Start difference. First operand has 160 places, 198 transitions, 2221 flow. Second operand 3 states and 1055 transitions. [2023-08-30 05:15:03,754 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 196 transitions, 2599 flow [2023-08-30 05:15:03,772 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 196 transitions, 2533 flow, removed 7 selfloop flow, removed 7 redundant places. [2023-08-30 05:15:03,774 INFO L231 Difference]: Finished difference. Result has 153 places, 196 transitions, 2153 flow [2023-08-30 05:15:03,775 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=822, PETRI_DIFFERENCE_MINUEND_FLOW=2151, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2153, PETRI_PLACES=153, PETRI_TRANSITIONS=196} [2023-08-30 05:15:03,775 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 85 predicate places. [2023-08-30 05:15:03,775 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 196 transitions, 2153 flow [2023-08-30 05:15:03,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 338.2) internal successors, (1691), 5 states have internal predecessors, (1691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:15:03,775 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:15:03,775 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 05:15:03,785 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2023-08-30 05:15:03,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:15:03,976 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2023-08-30 05:15:03,976 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:15:03,976 INFO L85 PathProgramCache]: Analyzing trace with hash -947396282, now seen corresponding path program 1 times [2023-08-30 05:15:03,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:15:03,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [657140034] [2023-08-30 05:15:03,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:15:03,977 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:15:03,977 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:15:03,978 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 05:15:03,980 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2023-08-30 05:15:04,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:15:04,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-30 05:15:04,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:15:04,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 05:15:04,142 INFO L321 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2023-08-30 05:15:04,143 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 23 [2023-08-30 05:15:04,151 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 24 [2023-08-30 05:15:04,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 05:15:04,196 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 [2023-08-30 05:15:04,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 05:15:04,245 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 [2023-08-30 05:15:04,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 05:15:04,284 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 [2023-08-30 05:15:04,337 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 05:15:04,337 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 05:15:04,337 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:15:04,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [657140034] [2023-08-30 05:15:04,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [657140034] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:15:04,337 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 05:15:04,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 05:15:04,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276231943] [2023-08-30 05:15:04,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:15:04,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 05:15:04,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:15:04,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 05:15:04,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-30 05:15:04,784 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 339 out of 822 [2023-08-30 05:15:04,785 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 196 transitions, 2153 flow. Second operand has 5 states, 5 states have (on average 341.2) internal successors, (1706), 5 states have internal predecessors, (1706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:15:04,785 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:15:04,785 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 339 of 822 [2023-08-30 05:15:04,785 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:15:05,616 INFO L130 PetriNetUnfolder]: 2160/4112 cut-off events. [2023-08-30 05:15:05,616 INFO L131 PetriNetUnfolder]: For 4823/4962 co-relation queries the response was YES. [2023-08-30 05:15:05,623 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14353 conditions, 4112 events. 2160/4112 cut-off events. For 4823/4962 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 30061 event pairs, 1314 based on Foata normal form. 2/2469 useless extension candidates. Maximal degree in co-relation 14302. Up to 4015 conditions per place. [2023-08-30 05:15:05,630 INFO L137 encePairwiseOnDemand]: 819/822 looper letters, 188 selfloop transitions, 1 changer transitions 0/194 dead transitions. [2023-08-30 05:15:05,630 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 194 transitions, 2527 flow [2023-08-30 05:15:05,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 05:15:05,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 05:15:05,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1062 transitions. [2023-08-30 05:15:05,632 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4306569343065693 [2023-08-30 05:15:05,632 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1062 transitions. [2023-08-30 05:15:05,632 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1062 transitions. [2023-08-30 05:15:05,633 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:15:05,633 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1062 transitions. [2023-08-30 05:15:05,634 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 354.0) internal successors, (1062), 3 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:15:05,635 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 822.0) internal successors, (3288), 4 states have internal predecessors, (3288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:15:05,635 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 822.0) internal successors, (3288), 4 states have internal predecessors, (3288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:15:05,635 INFO L175 Difference]: Start difference. First operand has 153 places, 196 transitions, 2153 flow. Second operand 3 states and 1062 transitions. [2023-08-30 05:15:05,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 194 transitions, 2527 flow [2023-08-30 05:15:05,651 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 194 transitions, 2526 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 05:15:05,654 INFO L231 Difference]: Finished difference. Result has 152 places, 194 transitions, 2150 flow [2023-08-30 05:15:05,654 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=822, PETRI_DIFFERENCE_MINUEND_FLOW=2148, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2150, PETRI_PLACES=152, PETRI_TRANSITIONS=194} [2023-08-30 05:15:05,654 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 84 predicate places. [2023-08-30 05:15:05,655 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 194 transitions, 2150 flow [2023-08-30 05:15:05,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 341.2) internal successors, (1706), 5 states have internal predecessors, (1706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:15:05,655 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:15:05,655 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 05:15:05,664 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Ended with exit code 0 [2023-08-30 05:15:05,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:15:05,862 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2023-08-30 05:15:05,863 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:15:05,863 INFO L85 PathProgramCache]: Analyzing trace with hash -1824027223, now seen corresponding path program 2 times [2023-08-30 05:15:05,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:15:05,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [675857859] [2023-08-30 05:15:05,863 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 05:15:05,863 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:15:05,863 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:15:05,864 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 05:15:05,864 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2023-08-30 05:15:05,984 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 05:15:05,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 05:15:05,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-30 05:15:05,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:15:06,010 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 5 [2023-08-30 05:15:06,065 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-30 05:15:06,066 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 05:15:06,351 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-30 05:15:06,351 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:15:06,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [675857859] [2023-08-30 05:15:06,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [675857859] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 05:15:06,351 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 05:15:06,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2023-08-30 05:15:06,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441243261] [2023-08-30 05:15:06,351 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 05:15:06,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-30 05:15:06,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:15:06,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-30 05:15:06,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-08-30 05:15:09,532 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 328 out of 822 [2023-08-30 05:15:09,533 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 194 transitions, 2150 flow. Second operand has 9 states, 9 states have (on average 330.0) internal successors, (2970), 9 states have internal predecessors, (2970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:15:09,533 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:15:09,533 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 328 of 822 [2023-08-30 05:15:09,533 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:15:10,885 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 05:15:13,132 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 05:15:16,698 INFO L130 PetriNetUnfolder]: 7062/13579 cut-off events. [2023-08-30 05:15:16,698 INFO L131 PetriNetUnfolder]: For 12603/13470 co-relation queries the response was YES. [2023-08-30 05:15:16,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45533 conditions, 13579 events. 7062/13579 cut-off events. For 12603/13470 co-relation queries the response was YES. Maximal size of possible extension queue 1010. Compared 120460 event pairs, 4687 based on Foata normal form. 18/8097 useless extension candidates. Maximal degree in co-relation 45481. Up to 4552 conditions per place. [2023-08-30 05:15:16,757 INFO L137 encePairwiseOnDemand]: 815/822 looper letters, 331 selfloop transitions, 86 changer transitions 0/422 dead transitions. [2023-08-30 05:15:16,757 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 422 transitions, 4402 flow [2023-08-30 05:15:16,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 05:15:16,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 05:15:16,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 3135 transitions. [2023-08-30 05:15:16,762 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4237631792376318 [2023-08-30 05:15:16,762 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 3135 transitions. [2023-08-30 05:15:16,762 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 3135 transitions. [2023-08-30 05:15:16,762 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:15:16,763 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 3135 transitions. [2023-08-30 05:15:16,765 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 348.3333333333333) internal successors, (3135), 9 states have internal predecessors, (3135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:15:16,768 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 822.0) internal successors, (8220), 10 states have internal predecessors, (8220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:15:16,768 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 822.0) internal successors, (8220), 10 states have internal predecessors, (8220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:15:16,768 INFO L175 Difference]: Start difference. First operand has 152 places, 194 transitions, 2150 flow. Second operand 9 states and 3135 transitions. [2023-08-30 05:15:16,769 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 422 transitions, 4402 flow [2023-08-30 05:15:16,939 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 422 transitions, 4401 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 05:15:16,942 INFO L231 Difference]: Finished difference. Result has 164 places, 199 transitions, 2494 flow [2023-08-30 05:15:16,943 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=822, PETRI_DIFFERENCE_MINUEND_FLOW=2149, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2494, PETRI_PLACES=164, PETRI_TRANSITIONS=199} [2023-08-30 05:15:16,943 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 96 predicate places. [2023-08-30 05:15:16,943 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 199 transitions, 2494 flow [2023-08-30 05:15:16,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 330.0) internal successors, (2970), 9 states have internal predecessors, (2970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:15:16,943 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:15:16,944 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 05:15:16,952 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2023-08-30 05:15:17,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:15:17,151 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2023-08-30 05:15:17,151 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:15:17,152 INFO L85 PathProgramCache]: Analyzing trace with hash -710304319, now seen corresponding path program 1 times [2023-08-30 05:15:17,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:15:17,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [715933039] [2023-08-30 05:15:17,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:15:17,152 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:15:17,152 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:15:17,153 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 05:15:17,153 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2023-08-30 05:15:17,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:15:17,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-30 05:15:17,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:15:17,386 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 05:15:17,386 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 05:15:17,557 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 05:15:17,557 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:15:17,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [715933039] [2023-08-30 05:15:17,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [715933039] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 05:15:17,558 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 05:15:17,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2023-08-30 05:15:17,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549427251] [2023-08-30 05:15:17,558 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 05:15:17,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-30 05:15:17,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:15:17,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-30 05:15:17,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2023-08-30 05:15:20,406 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 324 out of 822 [2023-08-30 05:15:20,408 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 199 transitions, 2494 flow. Second operand has 15 states, 15 states have (on average 325.46666666666664) internal successors, (4882), 15 states have internal predecessors, (4882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:15:20,408 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:15:20,409 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 324 of 822 [2023-08-30 05:15:20,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:15:25,228 INFO L130 PetriNetUnfolder]: 9617/18627 cut-off events. [2023-08-30 05:15:25,229 INFO L131 PetriNetUnfolder]: For 18452/19851 co-relation queries the response was YES. [2023-08-30 05:15:25,275 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62769 conditions, 18627 events. 9617/18627 cut-off events. For 18452/19851 co-relation queries the response was YES. Maximal size of possible extension queue 1580. Compared 176320 event pairs, 6558 based on Foata normal form. 8/11079 useless extension candidates. Maximal degree in co-relation 62712. Up to 9402 conditions per place. [2023-08-30 05:15:25,323 INFO L137 encePairwiseOnDemand]: 811/822 looper letters, 248 selfloop transitions, 77 changer transitions 0/330 dead transitions. [2023-08-30 05:15:25,324 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 330 transitions, 4176 flow [2023-08-30 05:15:25,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-30 05:15:25,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-30 05:15:25,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 4985 transitions. [2023-08-30 05:15:25,328 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4042984590429846 [2023-08-30 05:15:25,328 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 4985 transitions. [2023-08-30 05:15:25,328 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 4985 transitions. [2023-08-30 05:15:25,329 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:15:25,329 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 4985 transitions. [2023-08-30 05:15:25,333 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 332.3333333333333) internal successors, (4985), 15 states have internal predecessors, (4985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:15:25,337 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 822.0) internal successors, (13152), 16 states have internal predecessors, (13152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:15:25,338 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 822.0) internal successors, (13152), 16 states have internal predecessors, (13152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:15:25,338 INFO L175 Difference]: Start difference. First operand has 164 places, 199 transitions, 2494 flow. Second operand 15 states and 4985 transitions. [2023-08-30 05:15:25,338 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 330 transitions, 4176 flow [2023-08-30 05:15:25,594 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 330 transitions, 4162 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-30 05:15:25,597 INFO L231 Difference]: Finished difference. Result has 179 places, 215 transitions, 2926 flow [2023-08-30 05:15:25,597 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=822, PETRI_DIFFERENCE_MINUEND_FLOW=2482, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=2926, PETRI_PLACES=179, PETRI_TRANSITIONS=215} [2023-08-30 05:15:25,598 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 111 predicate places. [2023-08-30 05:15:25,598 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 215 transitions, 2926 flow [2023-08-30 05:15:25,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 325.46666666666664) internal successors, (4882), 15 states have internal predecessors, (4882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:15:25,599 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:15:25,599 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1] [2023-08-30 05:15:25,610 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2023-08-30 05:15:25,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:15:25,802 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2023-08-30 05:15:25,802 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:15:25,802 INFO L85 PathProgramCache]: Analyzing trace with hash -1007192099, now seen corresponding path program 3 times [2023-08-30 05:15:25,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:15:25,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1006350565] [2023-08-30 05:15:25,803 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 05:15:25,803 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:15:25,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:15:25,804 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 05:15:25,805 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2023-08-30 05:15:25,948 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-08-30 05:15:25,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 05:15:25,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-30 05:15:25,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:15:26,002 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-30 05:15:26,002 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-30 05:15:26,271 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 05:15:26,271 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 05:15:28,263 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 05:15:28,264 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:15:28,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1006350565] [2023-08-30 05:15:28,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1006350565] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 05:15:28,264 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 05:15:28,264 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2023-08-30 05:15:28,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718825133] [2023-08-30 05:15:28,264 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 05:15:28,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-30 05:15:28,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:15:28,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-30 05:15:28,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2023-08-30 05:15:53,183 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 330 out of 822 [2023-08-30 05:15:53,186 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 215 transitions, 2926 flow. Second operand has 24 states, 24 states have (on average 331.0) internal successors, (7944), 24 states have internal predecessors, (7944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:15:53,186 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:15:53,186 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 330 of 822 [2023-08-30 05:15:53,187 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:16:03,460 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 05:16:05,190 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.73s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 05:16:07,191 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 05:16:08,897 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.70s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 05:16:10,899 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 05:16:12,902 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 05:16:14,593 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.69s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 05:16:16,595 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 05:16:18,432 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.84s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 05:16:20,434 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 05:16:23,730 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.44s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 05:16:25,661 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.86s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 05:16:27,458 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.80s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 05:16:29,460 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 05:16:32,703 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.69s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 05:16:33,975 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 05:16:35,749 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.76s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 05:16:39,177 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 05:16:40,443 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 05:16:42,943 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 05:16:44,185 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 05:16:46,955 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 05:16:50,484 INFO L130 PetriNetUnfolder]: 9685/18779 cut-off events. [2023-08-30 05:16:50,484 INFO L131 PetriNetUnfolder]: For 19963/20798 co-relation queries the response was YES. [2023-08-30 05:16:50,544 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63866 conditions, 18779 events. 9685/18779 cut-off events. For 19963/20798 co-relation queries the response was YES. Maximal size of possible extension queue 1532. Compared 180329 event pairs, 5022 based on Foata normal form. 66/11305 useless extension candidates. Maximal degree in co-relation 63806. Up to 17994 conditions per place. [2023-08-30 05:16:50,774 INFO L137 encePairwiseOnDemand]: 814/822 looper letters, 132 selfloop transitions, 168 changer transitions 0/305 dead transitions. [2023-08-30 05:16:50,774 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 305 transitions, 5011 flow [2023-08-30 05:16:50,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-08-30 05:16:50,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-08-30 05:16:50,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 9718 transitions. [2023-08-30 05:16:50,787 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4076684285594429 [2023-08-30 05:16:50,787 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 9718 transitions. [2023-08-30 05:16:50,788 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 9718 transitions. [2023-08-30 05:16:50,790 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:16:50,790 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 9718 transitions. [2023-08-30 05:16:50,811 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 335.1034482758621) internal successors, (9718), 29 states have internal predecessors, (9718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:16:50,821 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 822.0) internal successors, (24660), 30 states have internal predecessors, (24660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:16:50,822 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 822.0) internal successors, (24660), 30 states have internal predecessors, (24660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:16:50,822 INFO L175 Difference]: Start difference. First operand has 179 places, 215 transitions, 2926 flow. Second operand 29 states and 9718 transitions. [2023-08-30 05:16:50,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 305 transitions, 5011 flow [2023-08-30 05:16:51,094 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 305 transitions, 4717 flow, removed 13 selfloop flow, removed 11 redundant places. [2023-08-30 05:16:51,098 INFO L231 Difference]: Finished difference. Result has 211 places, 284 transitions, 4381 flow [2023-08-30 05:16:51,098 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=822, PETRI_DIFFERENCE_MINUEND_FLOW=2697, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=4381, PETRI_PLACES=211, PETRI_TRANSITIONS=284} [2023-08-30 05:16:51,099 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 143 predicate places. [2023-08-30 05:16:51,099 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 284 transitions, 4381 flow [2023-08-30 05:16:51,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 331.0) internal successors, (7944), 24 states have internal predecessors, (7944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:16:51,100 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:16:51,100 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 05:16:51,108 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2023-08-30 05:16:51,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:16:51,304 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2023-08-30 05:16:51,304 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:16:51,304 INFO L85 PathProgramCache]: Analyzing trace with hash 695483782, now seen corresponding path program 1 times [2023-08-30 05:16:51,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:16:51,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [724027406] [2023-08-30 05:16:51,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:16:51,305 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:16:51,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:16:51,306 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 05:16:51,307 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2023-08-30 05:16:51,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:16:51,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 05:16:51,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:16:51,493 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-08-30 05:16:51,518 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-08-30 05:16:51,519 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2023-08-30 05:16:51,530 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 05:16:51,530 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 05:16:51,530 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:16:51,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [724027406] [2023-08-30 05:16:51,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [724027406] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:16:51,531 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 05:16:51,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 05:16:51,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458018186] [2023-08-30 05:16:51,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:16:51,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 05:16:51,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:16:51,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 05:16:51,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 05:16:51,760 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 334 out of 822 [2023-08-30 05:16:51,761 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 284 transitions, 4381 flow. Second operand has 4 states, 4 states have (on average 337.0) internal successors, (1348), 4 states have internal predecessors, (1348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:16:51,761 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:16:51,761 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 334 of 822 [2023-08-30 05:16:51,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:16:54,543 INFO L130 PetriNetUnfolder]: 7810/15379 cut-off events. [2023-08-30 05:16:54,544 INFO L131 PetriNetUnfolder]: For 19131/19890 co-relation queries the response was YES. [2023-08-30 05:16:54,589 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51866 conditions, 15379 events. 7810/15379 cut-off events. For 19131/19890 co-relation queries the response was YES. Maximal size of possible extension queue 1246. Compared 143851 event pairs, 4169 based on Foata normal form. 16/9857 useless extension candidates. Maximal degree in co-relation 51793. Up to 14622 conditions per place. [2023-08-30 05:16:54,624 INFO L137 encePairwiseOnDemand]: 818/822 looper letters, 168 selfloop transitions, 103 changer transitions 0/276 dead transitions. [2023-08-30 05:16:54,624 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 276 transitions, 4863 flow [2023-08-30 05:16:54,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 05:16:54,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 05:16:54,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1379 transitions. [2023-08-30 05:16:54,626 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4194038929440389 [2023-08-30 05:16:54,626 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1379 transitions. [2023-08-30 05:16:54,626 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1379 transitions. [2023-08-30 05:16:54,627 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:16:54,627 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1379 transitions. [2023-08-30 05:16:54,628 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 344.75) internal successors, (1379), 4 states have internal predecessors, (1379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:16:54,630 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 822.0) internal successors, (4110), 5 states have internal predecessors, (4110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:16:54,630 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 822.0) internal successors, (4110), 5 states have internal predecessors, (4110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:16:54,630 INFO L175 Difference]: Start difference. First operand has 211 places, 284 transitions, 4381 flow. Second operand 4 states and 1379 transitions. [2023-08-30 05:16:54,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 276 transitions, 4863 flow [2023-08-30 05:16:54,807 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 276 transitions, 4513 flow, removed 72 selfloop flow, removed 9 redundant places. [2023-08-30 05:16:54,810 INFO L231 Difference]: Finished difference. Result has 203 places, 276 transitions, 4177 flow [2023-08-30 05:16:54,810 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=822, PETRI_DIFFERENCE_MINUEND_FLOW=3971, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=4177, PETRI_PLACES=203, PETRI_TRANSITIONS=276} [2023-08-30 05:16:54,811 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 135 predicate places. [2023-08-30 05:16:54,811 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 276 transitions, 4177 flow [2023-08-30 05:16:54,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 337.0) internal successors, (1348), 4 states have internal predecessors, (1348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:16:54,811 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:16:54,811 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 05:16:54,819 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2023-08-30 05:16:55,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:16:55,012 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2023-08-30 05:16:55,012 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:16:55,012 INFO L85 PathProgramCache]: Analyzing trace with hash 695483783, now seen corresponding path program 1 times [2023-08-30 05:16:55,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:16:55,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1943894826] [2023-08-30 05:16:55,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:16:55,012 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:16:55,012 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:16:55,013 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 05:16:55,014 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2023-08-30 05:16:55,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:16:55,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-30 05:16:55,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:16:55,265 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-08-30 05:16:55,273 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 [2023-08-30 05:16:55,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 05:16:55,336 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 [2023-08-30 05:16:55,344 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-30 05:16:55,345 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 [2023-08-30 05:16:55,412 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 05:16:55,413 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 05:16:55,658 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 05:16:55,845 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 05:16:55,845 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:16:55,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1943894826] [2023-08-30 05:16:55,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1943894826] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 05:16:55,846 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 05:16:55,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-30 05:16:55,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373392391] [2023-08-30 05:16:55,846 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 05:16:55,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 05:16:55,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:16:55,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 05:16:55,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2023-08-30 05:16:57,994 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 05:17:00,792 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 05:17:03,459 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 05:17:06,451 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 05:17:08,734 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 05:17:10,915 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 05:17:13,176 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 05:17:15,409 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 05:17:17,594 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 05:17:19,689 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 05:17:21,917 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 05:17:24,281 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 05:17:26,380 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 05:17:28,878 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 05:17:31,084 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 05:17:33,200 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 05:17:33,673 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 299 out of 822 [2023-08-30 05:17:33,674 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 276 transitions, 4177 flow. Second operand has 12 states, 12 states have (on average 301.0) internal successors, (3612), 12 states have internal predecessors, (3612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:17:33,674 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:17:33,674 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 299 of 822 [2023-08-30 05:17:33,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:17:37,494 INFO L130 PetriNetUnfolder]: 7106/13763 cut-off events. [2023-08-30 05:17:37,494 INFO L131 PetriNetUnfolder]: For 21479/22019 co-relation queries the response was YES. [2023-08-30 05:17:37,533 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45314 conditions, 13763 events. 7106/13763 cut-off events. For 21479/22019 co-relation queries the response was YES. Maximal size of possible extension queue 1043. Compared 123547 event pairs, 4211 based on Foata normal form. 16/9981 useless extension candidates. Maximal degree in co-relation 45242. Up to 8507 conditions per place. [2023-08-30 05:17:37,564 INFO L137 encePairwiseOnDemand]: 815/822 looper letters, 216 selfloop transitions, 107 changer transitions 0/325 dead transitions. [2023-08-30 05:17:37,564 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 325 transitions, 5084 flow [2023-08-30 05:17:37,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-30 05:17:37,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-30 05:17:37,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 3071 transitions. [2023-08-30 05:17:37,567 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3736009732360097 [2023-08-30 05:17:37,567 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 3071 transitions. [2023-08-30 05:17:37,567 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 3071 transitions. [2023-08-30 05:17:37,568 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:17:37,568 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 3071 transitions. [2023-08-30 05:17:37,570 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 307.1) internal successors, (3071), 10 states have internal predecessors, (3071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:17:37,573 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 822.0) internal successors, (9042), 11 states have internal predecessors, (9042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:17:37,573 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 822.0) internal successors, (9042), 11 states have internal predecessors, (9042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:17:37,573 INFO L175 Difference]: Start difference. First operand has 203 places, 276 transitions, 4177 flow. Second operand 10 states and 3071 transitions. [2023-08-30 05:17:37,573 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 325 transitions, 5084 flow [2023-08-30 05:17:37,726 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 325 transitions, 4924 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 05:17:37,730 INFO L231 Difference]: Finished difference. Result has 208 places, 268 transitions, 4171 flow [2023-08-30 05:17:37,730 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=822, PETRI_DIFFERENCE_MINUEND_FLOW=3957, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4171, PETRI_PLACES=208, PETRI_TRANSITIONS=268} [2023-08-30 05:17:37,730 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 140 predicate places. [2023-08-30 05:17:37,730 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 268 transitions, 4171 flow [2023-08-30 05:17:37,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 301.0) internal successors, (3612), 12 states have internal predecessors, (3612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:17:37,731 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:17:37,731 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 2, 1, 1, 1, 1, 1] [2023-08-30 05:17:37,741 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2023-08-30 05:17:37,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:17:37,934 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2023-08-30 05:17:37,935 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:17:37,935 INFO L85 PathProgramCache]: Analyzing trace with hash 1486892958, now seen corresponding path program 2 times [2023-08-30 05:17:37,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:17:37,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1266288642] [2023-08-30 05:17:37,935 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 05:17:37,935 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:17:37,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:17:37,936 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 05:17:37,939 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2023-08-30 05:17:38,059 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 05:17:38,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 05:17:38,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-30 05:17:38,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:17:38,087 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 5 [2023-08-30 05:17:38,217 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 05:17:38,217 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 05:17:38,962 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 05:17:38,962 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:17:38,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1266288642] [2023-08-30 05:17:38,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1266288642] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 05:17:38,962 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 05:17:38,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2023-08-30 05:17:38,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045520825] [2023-08-30 05:17:38,962 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 05:17:38,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-30 05:17:38,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:17:38,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-30 05:17:38,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2023-08-30 05:17:50,461 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 328 out of 822 [2023-08-30 05:17:50,462 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 268 transitions, 4171 flow. Second operand has 15 states, 15 states have (on average 329.46666666666664) internal successors, (4942), 15 states have internal predecessors, (4942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:17:50,462 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:17:50,462 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 328 of 822 [2023-08-30 05:17:50,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:17:53,051 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.71s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 05:17:54,611 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.54s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 05:17:56,238 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.63s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 05:17:58,102 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.86s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 05:17:59,725 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.62s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 05:18:01,442 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 05:18:03,168 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.73s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 05:18:05,055 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.89s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 05:18:06,989 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.93s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 05:18:08,694 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 05:18:10,499 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.80s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 05:18:12,501 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 05:18:15,725 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 05:18:20,633 INFO L130 PetriNetUnfolder]: 6154/12401 cut-off events. [2023-08-30 05:18:20,633 INFO L131 PetriNetUnfolder]: For 25657/27096 co-relation queries the response was YES. [2023-08-30 05:18:20,670 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42124 conditions, 12401 events. 6154/12401 cut-off events. For 25657/27096 co-relation queries the response was YES. Maximal size of possible extension queue 945. Compared 112961 event pairs, 4280 based on Foata normal form. 76/8693 useless extension candidates. Maximal degree in co-relation 42051. Up to 3495 conditions per place. [2023-08-30 05:18:20,698 INFO L137 encePairwiseOnDemand]: 815/822 looper letters, 295 selfloop transitions, 173 changer transitions 0/473 dead transitions. [2023-08-30 05:18:20,698 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 473 transitions, 7018 flow [2023-08-30 05:18:20,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-30 05:18:20,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-30 05:18:20,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 5760 transitions. [2023-08-30 05:18:20,703 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41219407471017605 [2023-08-30 05:18:20,704 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 5760 transitions. [2023-08-30 05:18:20,704 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 5760 transitions. [2023-08-30 05:18:20,704 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:18:20,704 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 5760 transitions. [2023-08-30 05:18:20,707 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 338.8235294117647) internal successors, (5760), 17 states have internal predecessors, (5760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:18:20,713 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 822.0) internal successors, (14796), 18 states have internal predecessors, (14796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:18:20,714 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 822.0) internal successors, (14796), 18 states have internal predecessors, (14796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:18:20,714 INFO L175 Difference]: Start difference. First operand has 208 places, 268 transitions, 4171 flow. Second operand 17 states and 5760 transitions. [2023-08-30 05:18:20,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 473 transitions, 7018 flow [2023-08-30 05:18:20,838 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 473 transitions, 6967 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-08-30 05:18:20,844 INFO L231 Difference]: Finished difference. Result has 228 places, 317 transitions, 5727 flow [2023-08-30 05:18:20,844 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=822, PETRI_DIFFERENCE_MINUEND_FLOW=4120, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=5727, PETRI_PLACES=228, PETRI_TRANSITIONS=317} [2023-08-30 05:18:20,844 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 160 predicate places. [2023-08-30 05:18:20,844 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 317 transitions, 5727 flow [2023-08-30 05:18:20,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 329.46666666666664) internal successors, (4942), 15 states have internal predecessors, (4942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:18:20,845 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:18:20,845 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 05:18:20,853 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2023-08-30 05:18:21,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:18:21,046 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2023-08-30 05:18:21,046 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:18:21,046 INFO L85 PathProgramCache]: Analyzing trace with hash 1541585230, now seen corresponding path program 2 times [2023-08-30 05:18:21,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:18:21,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2114854591] [2023-08-30 05:18:21,046 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 05:18:21,047 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:18:21,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:18:21,047 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 05:18:21,048 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2023-08-30 05:18:21,152 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 05:18:21,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 05:18:21,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 05:18:21,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:18:21,159 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 [2023-08-30 05:18:21,180 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-08-30 05:18:21,180 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2023-08-30 05:18:21,195 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-08-30 05:18:21,195 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 [2023-08-30 05:18:21,206 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 05:18:21,206 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 05:18:21,206 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:18:21,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2114854591] [2023-08-30 05:18:21,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2114854591] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:18:21,206 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 05:18:21,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 05:18:21,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951294061] [2023-08-30 05:18:21,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:18:21,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 05:18:21,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:18:21,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 05:18:21,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 05:18:21,378 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 330 out of 822 [2023-08-30 05:18:21,379 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 317 transitions, 5727 flow. Second operand has 4 states, 4 states have (on average 332.75) internal successors, (1331), 4 states have internal predecessors, (1331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:18:21,379 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:18:21,379 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 330 of 822 [2023-08-30 05:18:21,379 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:18:23,443 INFO L130 PetriNetUnfolder]: 4979/9810 cut-off events. [2023-08-30 05:18:23,443 INFO L131 PetriNetUnfolder]: For 23057/23553 co-relation queries the response was YES. [2023-08-30 05:18:23,476 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33613 conditions, 9810 events. 4979/9810 cut-off events. For 23057/23553 co-relation queries the response was YES. Maximal size of possible extension queue 720. Compared 84405 event pairs, 2525 based on Foata normal form. 1428/7979 useless extension candidates. Maximal degree in co-relation 33531. Up to 9497 conditions per place. [2023-08-30 05:18:23,496 INFO L137 encePairwiseOnDemand]: 817/822 looper letters, 248 selfloop transitions, 58 changer transitions 0/309 dead transitions. [2023-08-30 05:18:23,496 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 309 transitions, 6281 flow [2023-08-30 05:18:23,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 05:18:23,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 05:18:23,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1360 transitions. [2023-08-30 05:18:23,498 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41362530413625304 [2023-08-30 05:18:23,498 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1360 transitions. [2023-08-30 05:18:23,498 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1360 transitions. [2023-08-30 05:18:23,498 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:18:23,498 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1360 transitions. [2023-08-30 05:18:23,499 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 340.0) internal successors, (1360), 4 states have internal predecessors, (1360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:18:23,501 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 822.0) internal successors, (4110), 5 states have internal predecessors, (4110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:18:23,501 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 822.0) internal successors, (4110), 5 states have internal predecessors, (4110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:18:23,501 INFO L175 Difference]: Start difference. First operand has 228 places, 317 transitions, 5727 flow. Second operand 4 states and 1360 transitions. [2023-08-30 05:18:23,501 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 309 transitions, 6281 flow [2023-08-30 05:18:23,553 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 309 transitions, 5811 flow, removed 106 selfloop flow, removed 6 redundant places. [2023-08-30 05:18:23,557 INFO L231 Difference]: Finished difference. Result has 222 places, 309 transitions, 5315 flow [2023-08-30 05:18:23,557 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=822, PETRI_DIFFERENCE_MINUEND_FLOW=5199, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=309, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=5315, PETRI_PLACES=222, PETRI_TRANSITIONS=309} [2023-08-30 05:18:23,558 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 154 predicate places. [2023-08-30 05:18:23,558 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 309 transitions, 5315 flow [2023-08-30 05:18:23,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 332.75) internal successors, (1331), 4 states have internal predecessors, (1331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:18:23,558 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:18:23,558 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 05:18:23,569 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2023-08-30 05:18:23,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:18:23,759 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2023-08-30 05:18:23,759 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:18:23,759 INFO L85 PathProgramCache]: Analyzing trace with hash 85157373, now seen corresponding path program 1 times [2023-08-30 05:18:23,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:18:23,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1862202638] [2023-08-30 05:18:23,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:18:23,759 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:18:23,760 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:18:23,761 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 05:18:23,762 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2023-08-30 05:18:23,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:18:23,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-30 05:18:23,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:18:23,891 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 [2023-08-30 05:18:23,906 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 05:18:23,906 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 05:18:23,907 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:18:23,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1862202638] [2023-08-30 05:18:23,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1862202638] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:18:23,907 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 05:18:23,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 05:18:23,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134621822] [2023-08-30 05:18:23,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:18:23,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 05:18:23,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:18:23,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 05:18:23,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 05:18:24,255 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 334 out of 822 [2023-08-30 05:18:24,256 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 309 transitions, 5315 flow. Second operand has 4 states, 4 states have (on average 337.25) internal successors, (1349), 4 states have internal predecessors, (1349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:18:24,256 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:18:24,256 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 334 of 822 [2023-08-30 05:18:24,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:18:25,886 INFO L130 PetriNetUnfolder]: 3647/7426 cut-off events. [2023-08-30 05:18:25,886 INFO L131 PetriNetUnfolder]: For 20890/21262 co-relation queries the response was YES. [2023-08-30 05:18:25,911 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25430 conditions, 7426 events. 3647/7426 cut-off events. For 20890/21262 co-relation queries the response was YES. Maximal size of possible extension queue 544. Compared 62304 event pairs, 1915 based on Foata normal form. 8/5537 useless extension candidates. Maximal degree in co-relation 25347. Up to 6725 conditions per place. [2023-08-30 05:18:25,928 INFO L137 encePairwiseOnDemand]: 818/822 looper letters, 238 selfloop transitions, 62 changer transitions 0/303 dead transitions. [2023-08-30 05:18:25,928 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 303 transitions, 5871 flow [2023-08-30 05:18:25,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 05:18:25,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 05:18:25,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1373 transitions. [2023-08-30 05:18:25,930 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41757907542579076 [2023-08-30 05:18:25,930 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1373 transitions. [2023-08-30 05:18:25,930 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1373 transitions. [2023-08-30 05:18:25,930 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:18:25,931 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1373 transitions. [2023-08-30 05:18:25,931 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 343.25) internal successors, (1373), 4 states have internal predecessors, (1373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:18:25,933 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 822.0) internal successors, (4110), 5 states have internal predecessors, (4110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:18:25,934 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 822.0) internal successors, (4110), 5 states have internal predecessors, (4110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:18:25,934 INFO L175 Difference]: Start difference. First operand has 222 places, 309 transitions, 5315 flow. Second operand 4 states and 1373 transitions. [2023-08-30 05:18:25,934 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 303 transitions, 5871 flow [2023-08-30 05:18:25,987 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 303 transitions, 5812 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 05:18:25,992 INFO L231 Difference]: Finished difference. Result has 221 places, 303 transitions, 5336 flow [2023-08-30 05:18:25,992 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=822, PETRI_DIFFERENCE_MINUEND_FLOW=5212, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=5336, PETRI_PLACES=221, PETRI_TRANSITIONS=303} [2023-08-30 05:18:25,993 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 153 predicate places. [2023-08-30 05:18:25,993 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 303 transitions, 5336 flow [2023-08-30 05:18:25,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 337.25) internal successors, (1349), 4 states have internal predecessors, (1349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:18:25,993 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:18:25,993 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 05:18:26,001 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2023-08-30 05:18:26,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:18:26,194 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2023-08-30 05:18:26,194 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:18:26,194 INFO L85 PathProgramCache]: Analyzing trace with hash 85157374, now seen corresponding path program 1 times [2023-08-30 05:18:26,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:18:26,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1436337771] [2023-08-30 05:18:26,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:18:26,195 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 [2023-08-30 05:18:26,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:18:26,196 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 05:18:26,196 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2023-08-30 05:18:26,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:18:26,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-30 05:18:26,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:18:26,421 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 5 [2023-08-30 05:18:26,595 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 05:18:26,596 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 05:18:27,079 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 05:18:27,080 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:18:27,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1436337771] [2023-08-30 05:18:27,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1436337771] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 05:18:27,080 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 05:18:27,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2023-08-30 05:18:27,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942000098] [2023-08-30 05:18:27,080 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 05:18:27,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-30 05:18:27,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:18:27,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-30 05:18:27,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2023-08-30 05:18:34,758 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 306 out of 822 [2023-08-30 05:18:34,760 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 303 transitions, 5336 flow. Second operand has 15 states, 15 states have (on average 307.73333333333335) internal successors, (4616), 15 states have internal predecessors, (4616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:18:34,760 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:18:34,760 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 306 of 822 [2023-08-30 05:18:34,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:18:38,523 INFO L130 PetriNetUnfolder]: 4157/8824 cut-off events. [2023-08-30 05:18:38,523 INFO L131 PetriNetUnfolder]: For 23530/24162 co-relation queries the response was YES. [2023-08-30 05:18:38,551 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28823 conditions, 8824 events. 4157/8824 cut-off events. For 23530/24162 co-relation queries the response was YES. Maximal size of possible extension queue 620. Compared 78381 event pairs, 1751 based on Foata normal form. 0/6817 useless extension candidates. Maximal degree in co-relation 28741. Up to 4738 conditions per place. [2023-08-30 05:18:38,566 INFO L137 encePairwiseOnDemand]: 809/822 looper letters, 209 selfloop transitions, 141 changer transitions 0/353 dead transitions. [2023-08-30 05:18:38,566 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 353 transitions, 6291 flow [2023-08-30 05:18:38,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-30 05:18:38,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-30 05:18:38,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 4060 transitions. [2023-08-30 05:18:38,570 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3799363653378252 [2023-08-30 05:18:38,570 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 4060 transitions. [2023-08-30 05:18:38,570 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 4060 transitions. [2023-08-30 05:18:38,571 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:18:38,571 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 4060 transitions. [2023-08-30 05:18:38,573 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 312.3076923076923) internal successors, (4060), 13 states have internal predecessors, (4060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:18:38,578 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 822.0) internal successors, (11508), 14 states have internal predecessors, (11508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:18:38,578 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 822.0) internal successors, (11508), 14 states have internal predecessors, (11508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:18:38,578 INFO L175 Difference]: Start difference. First operand has 221 places, 303 transitions, 5336 flow. Second operand 13 states and 4060 transitions. [2023-08-30 05:18:38,578 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 353 transitions, 6291 flow [2023-08-30 05:18:38,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 353 transitions, 6172 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 05:18:38,635 INFO L231 Difference]: Finished difference. Result has 234 places, 304 transitions, 5630 flow [2023-08-30 05:18:38,635 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=822, PETRI_DIFFERENCE_MINUEND_FLOW=5209, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=302, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=5630, PETRI_PLACES=234, PETRI_TRANSITIONS=304} [2023-08-30 05:18:38,639 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 166 predicate places. [2023-08-30 05:18:38,639 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 304 transitions, 5630 flow [2023-08-30 05:18:38,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 307.73333333333335) internal successors, (4616), 15 states have internal predecessors, (4616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:18:38,640 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:18:38,640 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 05:18:38,648 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2023-08-30 05:18:38,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:18:38,848 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2023-08-30 05:18:38,848 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:18:38,849 INFO L85 PathProgramCache]: Analyzing trace with hash -543339933, now seen corresponding path program 2 times [2023-08-30 05:18:38,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:18:38,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1141522276] [2023-08-30 05:18:38,849 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 05:18:38,849 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:18:38,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:18:38,850 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 05:18:38,852 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2023-08-30 05:18:38,994 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 05:18:38,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 05:18:38,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-30 05:18:38,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:18:39,027 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 [2023-08-30 05:18:39,036 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 10 treesize of output 9 [2023-08-30 05:18:39,189 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-08-30 05:18:39,189 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2023-08-30 05:18:39,199 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 16 treesize of output 18 [2023-08-30 05:18:39,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 05:18:39,296 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 16 treesize of output 18 [2023-08-30 05:18:39,317 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-30 05:18:39,318 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 [2023-08-30 05:18:39,459 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-30 05:18:39,459 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 05:18:39,459 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:18:39,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1141522276] [2023-08-30 05:18:39,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1141522276] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:18:39,459 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 05:18:39,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 05:18:39,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538445918] [2023-08-30 05:18:39,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:18:39,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 05:18:39,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:18:39,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 05:18:39,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-30 05:18:40,734 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 320 out of 822 [2023-08-30 05:18:40,734 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 304 transitions, 5630 flow. Second operand has 6 states, 6 states have (on average 321.8333333333333) internal successors, (1931), 6 states have internal predecessors, (1931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:18:40,734 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:18:40,735 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 320 of 822 [2023-08-30 05:18:40,735 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:18:42,631 INFO L130 PetriNetUnfolder]: 3609/7332 cut-off events. [2023-08-30 05:18:42,631 INFO L131 PetriNetUnfolder]: For 34135/34419 co-relation queries the response was YES. [2023-08-30 05:18:42,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27806 conditions, 7332 events. 3609/7332 cut-off events. For 34135/34419 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 60255 event pairs, 1851 based on Foata normal form. 224/6597 useless extension candidates. Maximal degree in co-relation 27720. Up to 7123 conditions per place. [2023-08-30 05:18:42,667 INFO L137 encePairwiseOnDemand]: 817/822 looper letters, 219 selfloop transitions, 80 changer transitions 0/301 dead transitions. [2023-08-30 05:18:42,667 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 301 transitions, 6200 flow [2023-08-30 05:18:42,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 05:18:42,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 05:18:42,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1636 transitions. [2023-08-30 05:18:42,669 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3980535279805353 [2023-08-30 05:18:42,669 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1636 transitions. [2023-08-30 05:18:42,669 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1636 transitions. [2023-08-30 05:18:42,670 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:18:42,670 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1636 transitions. [2023-08-30 05:18:42,671 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 327.2) internal successors, (1636), 5 states have internal predecessors, (1636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:18:42,672 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 822.0) internal successors, (4932), 6 states have internal predecessors, (4932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:18:42,672 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 822.0) internal successors, (4932), 6 states have internal predecessors, (4932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:18:42,673 INFO L175 Difference]: Start difference. First operand has 234 places, 304 transitions, 5630 flow. Second operand 5 states and 1636 transitions. [2023-08-30 05:18:42,673 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 301 transitions, 6200 flow [2023-08-30 05:18:42,726 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 301 transitions, 5986 flow, removed 4 selfloop flow, removed 13 redundant places. [2023-08-30 05:18:42,731 INFO L231 Difference]: Finished difference. Result has 223 places, 301 transitions, 5548 flow [2023-08-30 05:18:42,731 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=822, PETRI_DIFFERENCE_MINUEND_FLOW=5388, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=301, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=5548, PETRI_PLACES=223, PETRI_TRANSITIONS=301} [2023-08-30 05:18:42,731 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 155 predicate places. [2023-08-30 05:18:42,732 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 301 transitions, 5548 flow [2023-08-30 05:18:42,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 321.8333333333333) internal successors, (1931), 6 states have internal predecessors, (1931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:18:42,732 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:18:42,732 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 05:18:42,740 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2023-08-30 05:18:42,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:18:42,939 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2023-08-30 05:18:42,939 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:18:42,940 INFO L85 PathProgramCache]: Analyzing trace with hash 1005020712, now seen corresponding path program 2 times [2023-08-30 05:18:42,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:18:42,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [888526609] [2023-08-30 05:18:42,940 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 05:18:42,940 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:18:42,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:18:42,941 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 05:18:42,943 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2023-08-30 05:18:43,068 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 05:18:43,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 05:18:43,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 22 conjunts are in the unsatisfiable core [2023-08-30 05:18:43,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:18:43,133 INFO L321 Elim1Store]: treesize reduction 41, result has 34.9 percent of original size [2023-08-30 05:18:43,133 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 16 treesize of output 31 [2023-08-30 05:18:43,188 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-08-30 05:18:43,189 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2023-08-30 05:18:43,317 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-08-30 05:18:43,318 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2023-08-30 05:18:43,324 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 16 treesize of output 18 [2023-08-30 05:18:43,404 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-08-30 05:18:43,405 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2023-08-30 05:18:43,413 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 16 treesize of output 18 [2023-08-30 05:18:43,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 05:18:43,445 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 16 treesize of output 18 [2023-08-30 05:18:43,452 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-30 05:18:43,453 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 [2023-08-30 05:18:43,513 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-30 05:18:43,513 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 05:18:43,513 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:18:43,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [888526609] [2023-08-30 05:18:43,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [888526609] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:18:43,514 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 05:18:43,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 05:18:43,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454247683] [2023-08-30 05:18:43,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:18:43,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 05:18:43,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:18:43,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 05:18:43,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 05:18:44,678 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 320 out of 822 [2023-08-30 05:18:44,679 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 301 transitions, 5548 flow. Second operand has 5 states, 5 states have (on average 322.2) internal successors, (1611), 5 states have internal predecessors, (1611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:18:44,679 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:18:44,679 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 320 of 822 [2023-08-30 05:18:44,679 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:18:46,235 INFO L130 PetriNetUnfolder]: 3241/6358 cut-off events. [2023-08-30 05:18:46,235 INFO L131 PetriNetUnfolder]: For 30184/30184 co-relation queries the response was YES. [2023-08-30 05:18:46,253 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24422 conditions, 6358 events. 3241/6358 cut-off events. For 30184/30184 co-relation queries the response was YES. Maximal size of possible extension queue 403. Compared 48785 event pairs, 1555 based on Foata normal form. 54/5760 useless extension candidates. Maximal degree in co-relation 24340. Up to 6333 conditions per place. [2023-08-30 05:18:46,264 INFO L137 encePairwiseOnDemand]: 816/822 looper letters, 272 selfloop transitions, 23 changer transitions 0/295 dead transitions. [2023-08-30 05:18:46,264 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 295 transitions, 6080 flow [2023-08-30 05:18:46,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 05:18:46,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 05:18:46,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1316 transitions. [2023-08-30 05:18:46,267 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4002433090024331 [2023-08-30 05:18:46,267 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1316 transitions. [2023-08-30 05:18:46,267 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1316 transitions. [2023-08-30 05:18:46,267 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:18:46,267 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1316 transitions. [2023-08-30 05:18:46,268 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 329.0) internal successors, (1316), 4 states have internal predecessors, (1316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:18:46,269 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 822.0) internal successors, (4110), 5 states have internal predecessors, (4110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:18:46,270 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 822.0) internal successors, (4110), 5 states have internal predecessors, (4110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:18:46,270 INFO L175 Difference]: Start difference. First operand has 223 places, 301 transitions, 5548 flow. Second operand 4 states and 1316 transitions. [2023-08-30 05:18:46,270 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 295 transitions, 6080 flow [2023-08-30 05:18:46,317 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 295 transitions, 5953 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-08-30 05:18:46,322 INFO L231 Difference]: Finished difference. Result has 217 places, 295 transitions, 5409 flow [2023-08-30 05:18:46,322 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=822, PETRI_DIFFERENCE_MINUEND_FLOW=5363, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=5409, PETRI_PLACES=217, PETRI_TRANSITIONS=295} [2023-08-30 05:18:46,322 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 149 predicate places. [2023-08-30 05:18:46,322 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 295 transitions, 5409 flow [2023-08-30 05:18:46,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 322.2) internal successors, (1611), 5 states have internal predecessors, (1611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:18:46,323 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:18:46,323 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 05:18:46,335 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2023-08-30 05:18:46,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:18:46,530 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2023-08-30 05:18:46,530 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:18:46,530 INFO L85 PathProgramCache]: Analyzing trace with hash 1836225215, now seen corresponding path program 2 times [2023-08-30 05:18:46,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:18:46,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [482869154] [2023-08-30 05:18:46,531 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 05:18:46,531 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:18:46,531 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:18:46,532 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 05:18:46,532 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2023-08-30 05:18:46,646 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 05:18:46,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 05:18:46,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-30 05:18:46,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:18:46,697 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 [2023-08-30 05:18:46,815 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-30 05:18:46,815 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 05:18:46,815 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:18:46,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [482869154] [2023-08-30 05:18:46,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [482869154] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:18:46,815 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 05:18:46,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 05:18:46,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298043694] [2023-08-30 05:18:46,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:18:46,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 05:18:46,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:18:46,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 05:18:46,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2023-08-30 05:18:47,386 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 334 out of 822 [2023-08-30 05:18:47,386 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 295 transitions, 5409 flow. Second operand has 6 states, 6 states have (on average 336.1666666666667) internal successors, (2017), 6 states have internal predecessors, (2017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:18:47,387 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:18:47,387 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 334 of 822 [2023-08-30 05:18:47,387 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:18:48,652 INFO L130 PetriNetUnfolder]: 2261/4482 cut-off events. [2023-08-30 05:18:48,652 INFO L131 PetriNetUnfolder]: For 27500/27500 co-relation queries the response was YES. [2023-08-30 05:18:48,666 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17432 conditions, 4482 events. 2261/4482 cut-off events. For 27500/27500 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 31891 event pairs, 1095 based on Foata normal form. 560/4558 useless extension candidates. Maximal degree in co-relation 17352. Up to 3975 conditions per place. [2023-08-30 05:18:48,675 INFO L137 encePairwiseOnDemand]: 816/822 looper letters, 176 selfloop transitions, 114 changer transitions 0/290 dead transitions. [2023-08-30 05:18:48,675 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 290 transitions, 5949 flow [2023-08-30 05:18:48,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 05:18:48,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 05:18:48,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 2036 transitions. [2023-08-30 05:18:48,678 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41281427412814276 [2023-08-30 05:18:48,678 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 2036 transitions. [2023-08-30 05:18:48,679 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 2036 transitions. [2023-08-30 05:18:48,679 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:18:48,679 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 2036 transitions. [2023-08-30 05:18:48,680 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 339.3333333333333) internal successors, (2036), 6 states have internal predecessors, (2036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:18:48,683 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 822.0) internal successors, (5754), 7 states have internal predecessors, (5754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:18:48,683 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 822.0) internal successors, (5754), 7 states have internal predecessors, (5754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:18:48,683 INFO L175 Difference]: Start difference. First operand has 217 places, 295 transitions, 5409 flow. Second operand 6 states and 2036 transitions. [2023-08-30 05:18:48,683 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 290 transitions, 5949 flow [2023-08-30 05:18:48,727 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 290 transitions, 5918 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-30 05:18:48,732 INFO L231 Difference]: Finished difference. Result has 216 places, 290 transitions, 5566 flow [2023-08-30 05:18:48,733 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=822, PETRI_DIFFERENCE_MINUEND_FLOW=5338, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=290, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5566, PETRI_PLACES=216, PETRI_TRANSITIONS=290} [2023-08-30 05:18:48,733 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 148 predicate places. [2023-08-30 05:18:48,733 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 290 transitions, 5566 flow [2023-08-30 05:18:48,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 336.1666666666667) internal successors, (2017), 6 states have internal predecessors, (2017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:18:48,734 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:18:48,734 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 05:18:48,744 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 [2023-08-30 05:18:48,942 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 [2023-08-30 05:18:48,942 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2023-08-30 05:18:48,942 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:18:48,942 INFO L85 PathProgramCache]: Analyzing trace with hash 1876616425, now seen corresponding path program 3 times [2023-08-30 05:18:48,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:18:48,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1264589492] [2023-08-30 05:18:48,943 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 05:18:48,943 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:18:48,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:18:48,944 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) [2023-08-30 05:18:48,944 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 [2023-08-30 05:18:49,097 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 05:18:49,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 05:18:49,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 24 conjunts are in the unsatisfiable core [2023-08-30 05:18:49,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:18:49,119 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 [2023-08-30 05:18:49,187 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 13 treesize of output 9 [2023-08-30 05:18:49,252 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 5 [2023-08-30 05:18:49,421 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-30 05:18:49,421 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 05:18:50,190 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-08-30 05:18:50,191 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:18:50,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1264589492] [2023-08-30 05:18:50,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1264589492] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 05:18:50,191 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 05:18:50,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 3] total 9 [2023-08-30 05:18:50,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797467467] [2023-08-30 05:18:50,191 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 05:18:50,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 05:18:50,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:18:50,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 05:18:50,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-08-30 05:18:59,260 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 05:19:03,024 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 05:19:06,594 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 05:19:21,128 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 314 out of 822 [2023-08-30 05:19:21,130 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 290 transitions, 5566 flow. Second operand has 10 states, 10 states have (on average 315.9) internal successors, (3159), 10 states have internal predecessors, (3159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:19:21,130 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:19:21,130 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 314 of 822 [2023-08-30 05:19:21,130 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:19:27,838 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 05:19:29,852 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 05:19:44,279 WARN L222 SmtUtils]: Spent 13.51s on a formula simplification. DAG size of input: 47 DAG size of output: 44 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 05:19:47,403 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 05:19:53,441 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 05:19:55,506 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 05:19:57,593 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 05:19:59,651 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 05:20:01,733 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 05:20:03,853 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 05:20:06,026 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 05:20:08,368 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 05:20:08,977 INFO L130 PetriNetUnfolder]: 2269/4489 cut-off events. [2023-08-30 05:20:08,977 INFO L131 PetriNetUnfolder]: For 22681/22681 co-relation queries the response was YES. [2023-08-30 05:20:08,995 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17663 conditions, 4489 events. 2269/4489 cut-off events. For 22681/22681 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 31784 event pairs, 1175 based on Foata normal form. 17/4022 useless extension candidates. Maximal degree in co-relation 17585. Up to 2650 conditions per place. [2023-08-30 05:20:09,004 INFO L137 encePairwiseOnDemand]: 814/822 looper letters, 176 selfloop transitions, 165 changer transitions 0/341 dead transitions. [2023-08-30 05:20:09,004 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 341 transitions, 6582 flow [2023-08-30 05:20:09,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-30 05:20:09,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-30 05:20:09,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 3202 transitions. [2023-08-30 05:20:09,017 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38953771289537714 [2023-08-30 05:20:09,017 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 3202 transitions. [2023-08-30 05:20:09,017 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 3202 transitions. [2023-08-30 05:20:09,017 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:20:09,018 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 3202 transitions. [2023-08-30 05:20:09,019 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 320.2) internal successors, (3202), 10 states have internal predecessors, (3202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:20:09,022 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 822.0) internal successors, (9042), 11 states have internal predecessors, (9042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:20:09,023 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 822.0) internal successors, (9042), 11 states have internal predecessors, (9042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:20:09,023 INFO L175 Difference]: Start difference. First operand has 216 places, 290 transitions, 5566 flow. Second operand 10 states and 3202 transitions. [2023-08-30 05:20:09,023 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 341 transitions, 6582 flow [2023-08-30 05:20:09,064 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 341 transitions, 6199 flow, removed 0 selfloop flow, removed 9 redundant places. [2023-08-30 05:20:09,069 INFO L231 Difference]: Finished difference. Result has 215 places, 308 transitions, 5889 flow [2023-08-30 05:20:09,069 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=822, PETRI_DIFFERENCE_MINUEND_FLOW=5061, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5889, PETRI_PLACES=215, PETRI_TRANSITIONS=308} [2023-08-30 05:20:09,070 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 147 predicate places. [2023-08-30 05:20:09,070 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 308 transitions, 5889 flow [2023-08-30 05:20:09,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 315.9) internal successors, (3159), 10 states have internal predecessors, (3159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:20:09,070 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:20:09,070 INFO L208 CegarLoopForPetriNet]: trace histogram [13, 1, 1, 1, 1] [2023-08-30 05:20:09,082 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2023-08-30 05:20:09,273 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 [2023-08-30 05:20:09,273 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2023-08-30 05:20:09,273 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:20:09,273 INFO L85 PathProgramCache]: Analyzing trace with hash 242392356, now seen corresponding path program 1 times [2023-08-30 05:20:09,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:20:09,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1634888613] [2023-08-30 05:20:09,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:20:09,274 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:20:09,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:20:09,274 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) [2023-08-30 05:20:09,275 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 [2023-08-30 05:20:09,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:20:09,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-30 05:20:09,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:20:09,443 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 [2023-08-30 05:20:11,192 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 05:20:11,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 05:20:18,772 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 05:20:18,772 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:20:18,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1634888613] [2023-08-30 05:20:18,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1634888613] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 05:20:18,772 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 05:20:18,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 29 [2023-08-30 05:20:18,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081462111] [2023-08-30 05:20:18,773 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 05:20:18,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-30 05:20:18,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:20:18,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-30 05:20:18,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=617, Unknown=0, NotChecked=0, Total=870 [2023-08-30 05:22:40,446 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 328 out of 822 [2023-08-30 05:22:40,448 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 308 transitions, 5889 flow. Second operand has 30 states, 30 states have (on average 329.06666666666666) internal successors, (9872), 30 states have internal predecessors, (9872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:22:40,448 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:22:40,448 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 328 of 822 [2023-08-30 05:22:40,449 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:22:49,907 WARN L222 SmtUtils]: Spent 8.02s 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) [2023-08-30 05:22:57,466 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 [] [2023-08-30 05:22:59,469 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 05:23:01,472 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 05:23:03,475 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 05:23:05,478 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 05:23:07,480 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 05:23:09,484 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 05:23:11,487 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 05:23:13,173 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.60s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 05:23:15,175 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 05:23:17,178 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 05:23:19,181 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 05:23:21,185 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 05:23:31,885 WARN L222 SmtUtils]: Spent 9.19s on a formula simplification that was a NOOP. DAG size: 145 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 05:23:38,568 WARN L222 SmtUtils]: Spent 5.11s on a formula simplification that was a NOOP. DAG size: 135 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) Killed by 15