./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/popl20-more-vector-add.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/popl20-more-vector-add.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 f91e7b856fd6bf43c568f48d1703ed519fbb708e5c1360b96f8534e6fa4ed35d --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 03:33:55,973 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 03:33:55,976 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 03:33:56,016 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 03:33:56,018 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 03:33:56,021 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 03:33:56,023 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 03:33:56,025 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 03:33:56,027 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 03:33:56,031 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 03:33:56,032 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 03:33:56,034 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 03:33:56,035 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 03:33:56,037 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 03:33:56,038 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 03:33:56,043 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 03:33:56,044 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 03:33:56,045 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 03:33:56,046 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 03:33:56,051 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 03:33:56,052 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 03:33:56,066 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 03:33:56,067 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 03:33:56,068 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 03:33:56,078 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 03:33:56,078 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 03:33:56,079 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 03:33:56,080 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 03:33:56,081 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 03:33:56,081 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 03:33:56,082 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 03:33:56,087 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 03:33:56,088 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 03:33:56,089 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 03:33:56,090 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 03:33:56,091 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 03:33:56,091 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 03:33:56,092 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 03:33:56,092 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 03:33:56,093 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 03:33:56,093 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 03:33:56,095 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-09-01 03:33:56,119 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 03:33:56,120 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 03:33:56,121 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 03:33:56,121 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 03:33:56,122 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 03:33:56,122 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 03:33:56,122 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 03:33:56,123 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 03:33:56,123 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 03:33:56,123 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 03:33:56,124 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 03:33:56,124 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-09-01 03:33:56,124 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 03:33:56,124 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 03:33:56,125 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 03:33:56,125 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-09-01 03:33:56,125 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-09-01 03:33:56,125 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-09-01 03:33:56,125 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 03:33:56,126 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-09-01 03:33:56,126 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 03:33:56,126 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 03:33:56,126 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 03:33:56,126 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 03:33:56,127 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 03:33:56,127 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 03:33:56,127 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 03:33:56,127 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 03:33:56,127 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 03:33:56,128 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 03:33:56,128 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 03:33:56,128 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 03:33:56,128 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 03:33:56,128 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 03:33:56,129 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f91e7b856fd6bf43c568f48d1703ed519fbb708e5c1360b96f8534e6fa4ed35d Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 03:33:56,417 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 03:33:56,435 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 03:33:56,438 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 03:33:56,438 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 03:33:56,439 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 03:33:56,440 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-vector-add.wvr.c [2023-09-01 03:33:57,594 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 03:33:57,793 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 03:33:57,794 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-vector-add.wvr.c [2023-09-01 03:33:57,820 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/86856a7d2/927628717fd64a04b8f0b7a92bf0896a/FLAG830398822 [2023-09-01 03:33:57,842 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/86856a7d2/927628717fd64a04b8f0b7a92bf0896a [2023-09-01 03:33:57,845 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 03:33:57,846 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 03:33:57,848 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 03:33:57,849 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 03:33:57,851 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 03:33:57,852 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 03:33:57" (1/1) ... [2023-09-01 03:33:57,855 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4bcc8560 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:33:57, skipping insertion in model container [2023-09-01 03:33:57,855 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 03:33:57" (1/1) ... [2023-09-01 03:33:57,861 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 03:33:57,883 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 03:33:58,032 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-vector-add.wvr.c[2598,2611] [2023-09-01 03:33:58,042 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 03:33:58,051 ERROR L324 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2023-09-01 03:33:58,052 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@21718fba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:33:58, skipping insertion in model container [2023-09-01 03:33:58,052 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 03:33:58,053 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-09-01 03:33:58,054 INFO L158 Benchmark]: Toolchain (without parser) took 207.73ms. Allocated memory is still 79.7MB. Free memory was 60.5MB in the beginning and 50.8MB in the end (delta: 9.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-09-01 03:33:58,055 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 62.9MB. Free memory is still 40.9MB. There was no memory consumed. Max. memory is 16.1GB. [2023-09-01 03:33:58,055 INFO L158 Benchmark]: CACSL2BoogieTranslator took 204.19ms. Allocated memory is still 79.7MB. Free memory was 60.3MB in the beginning and 50.8MB in the end (delta: 9.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-09-01 03:33:58,056 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 62.9MB. Free memory is still 40.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 204.19ms. Allocated memory is still 79.7MB. Free memory was 60.3MB in the beginning and 50.8MB in the end (delta: 9.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 106]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/popl20-more-vector-add.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 f91e7b856fd6bf43c568f48d1703ed519fbb708e5c1360b96f8534e6fa4ed35d --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 03:33:59,680 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 03:33:59,682 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 03:33:59,714 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 03:33:59,716 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 03:33:59,719 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 03:33:59,721 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 03:33:59,723 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 03:33:59,725 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 03:33:59,729 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 03:33:59,730 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 03:33:59,733 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 03:33:59,733 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 03:33:59,735 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 03:33:59,736 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 03:33:59,741 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 03:33:59,742 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 03:33:59,743 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 03:33:59,744 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 03:33:59,747 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 03:33:59,759 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 03:33:59,760 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 03:33:59,761 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 03:33:59,762 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 03:33:59,770 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 03:33:59,770 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 03:33:59,770 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 03:33:59,772 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 03:33:59,772 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 03:33:59,773 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 03:33:59,773 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 03:33:59,778 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 03:33:59,780 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 03:33:59,782 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 03:33:59,783 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 03:33:59,783 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 03:33:59,784 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 03:33:59,785 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 03:33:59,785 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 03:33:59,785 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 03:33:59,786 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 03:33:59,787 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-09-01 03:33:59,820 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 03:33:59,821 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 03:33:59,822 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 03:33:59,822 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 03:33:59,823 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 03:33:59,823 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 03:33:59,824 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 03:33:59,824 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 03:33:59,824 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 03:33:59,824 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 03:33:59,825 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 03:33:59,825 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-09-01 03:33:59,825 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 03:33:59,826 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 03:33:59,826 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 03:33:59,826 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-09-01 03:33:59,826 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-09-01 03:33:59,826 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-09-01 03:33:59,826 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 03:33:59,827 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-09-01 03:33:59,827 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-09-01 03:33:59,827 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-09-01 03:33:59,827 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 03:33:59,827 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 03:33:59,828 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 03:33:59,828 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 03:33:59,828 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 03:33:59,828 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 03:33:59,829 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 03:33:59,829 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 03:33:59,829 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-09-01 03:33:59,829 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-09-01 03:33:59,829 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 03:33:59,830 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 03:33:59,830 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 03:33:59,830 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-09-01 03:33:59,830 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 03:33:59,830 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f91e7b856fd6bf43c568f48d1703ed519fbb708e5c1360b96f8534e6fa4ed35d Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 03:34:00,136 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 03:34:00,155 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 03:34:00,158 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 03:34:00,160 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 03:34:00,160 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 03:34:00,162 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-vector-add.wvr.c [2023-09-01 03:34:01,330 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 03:34:01,524 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 03:34:01,525 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-vector-add.wvr.c [2023-09-01 03:34:01,533 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bf2e50b78/893d642bf461446b85bec9a49bbfd256/FLAG2fafc1db0 [2023-09-01 03:34:01,551 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bf2e50b78/893d642bf461446b85bec9a49bbfd256 [2023-09-01 03:34:01,558 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 03:34:01,559 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 03:34:01,562 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 03:34:01,563 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 03:34:01,570 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 03:34:01,572 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 03:34:01" (1/1) ... [2023-09-01 03:34:01,575 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@30958623 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:34:01, skipping insertion in model container [2023-09-01 03:34:01,575 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 03:34:01" (1/1) ... [2023-09-01 03:34:01,581 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 03:34:01,603 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 03:34:01,790 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-vector-add.wvr.c[2598,2611] [2023-09-01 03:34:01,806 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 03:34:01,823 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-09-01 03:34:01,832 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 03:34:01,850 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-vector-add.wvr.c[2598,2611] [2023-09-01 03:34:01,853 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 03:34:01,858 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 03:34:01,894 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-vector-add.wvr.c[2598,2611] [2023-09-01 03:34:01,898 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 03:34:01,918 INFO L208 MainTranslator]: Completed translation [2023-09-01 03:34:01,919 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:34:01 WrapperNode [2023-09-01 03:34:01,919 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 03:34:01,920 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 03:34:01,920 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 03:34:01,921 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 03:34:01,926 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:34:01" (1/1) ... [2023-09-01 03:34:01,952 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:34:01" (1/1) ... [2023-09-01 03:34:01,984 INFO L138 Inliner]: procedures = 27, calls = 46, calls flagged for inlining = 11, calls inlined = 17, statements flattened = 197 [2023-09-01 03:34:01,984 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 03:34:01,985 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 03:34:01,985 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 03:34:01,985 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 03:34:01,993 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:34:01" (1/1) ... [2023-09-01 03:34:01,993 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:34:01" (1/1) ... [2023-09-01 03:34:01,997 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:34:01" (1/1) ... [2023-09-01 03:34:01,997 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:34:01" (1/1) ... [2023-09-01 03:34:02,010 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:34:01" (1/1) ... [2023-09-01 03:34:02,024 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:34:01" (1/1) ... [2023-09-01 03:34:02,026 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:34:01" (1/1) ... [2023-09-01 03:34:02,028 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:34:01" (1/1) ... [2023-09-01 03:34:02,030 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 03:34:02,033 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 03:34:02,033 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 03:34:02,034 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 03:34:02,035 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:34:01" (1/1) ... [2023-09-01 03:34:02,040 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 03:34:02,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 03:34:02,062 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-09-01 03:34:02,088 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-09-01 03:34:02,113 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 03:34:02,113 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-09-01 03:34:02,113 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 03:34:02,113 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-09-01 03:34:02,113 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-09-01 03:34:02,114 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-09-01 03:34:02,114 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-09-01 03:34:02,114 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-09-01 03:34:02,114 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-09-01 03:34:02,114 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-09-01 03:34:02,114 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-09-01 03:34:02,114 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 03:34:02,114 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 03:34:02,114 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 03:34:02,114 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-09-01 03:34:02,115 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-09-01 03:34:02,240 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 03:34:02,241 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 03:34:02,988 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 03:34:03,000 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 03:34:03,001 INFO L302 CfgBuilder]: Removed 7 assume(true) statements. [2023-09-01 03:34:03,004 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 03:34:03 BoogieIcfgContainer [2023-09-01 03:34:03,004 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 03:34:03,005 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 03:34:03,006 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 03:34:03,008 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 03:34:03,008 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 03:34:01" (1/3) ... [2023-09-01 03:34:03,009 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2af14532 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 03:34:03, skipping insertion in model container [2023-09-01 03:34:03,009 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:34:01" (2/3) ... [2023-09-01 03:34:03,009 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2af14532 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 03:34:03, skipping insertion in model container [2023-09-01 03:34:03,009 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 03:34:03" (3/3) ... [2023-09-01 03:34:03,010 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-vector-add.wvr.c [2023-09-01 03:34:03,023 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 03:34:03,024 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 44 error locations. [2023-09-01 03:34:03,024 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 03:34:03,163 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-09-01 03:34:03,203 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 300 places, 315 transitions, 654 flow [2023-09-01 03:34:03,330 INFO L130 PetriNetUnfolder]: 25/312 cut-off events. [2023-09-01 03:34:03,330 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-09-01 03:34:03,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 325 conditions, 312 events. 25/312 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 403 event pairs, 0 based on Foata normal form. 0/243 useless extension candidates. Maximal degree in co-relation 240. Up to 2 conditions per place. [2023-09-01 03:34:03,338 INFO L82 GeneralOperation]: Start removeDead. Operand has 300 places, 315 transitions, 654 flow [2023-09-01 03:34:03,350 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 293 places, 308 transitions, 634 flow [2023-09-01 03:34:03,355 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 03:34:03,364 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 293 places, 308 transitions, 634 flow [2023-09-01 03:34:03,366 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 293 places, 308 transitions, 634 flow [2023-09-01 03:34:03,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 293 places, 308 transitions, 634 flow [2023-09-01 03:34:03,425 INFO L130 PetriNetUnfolder]: 25/308 cut-off events. [2023-09-01 03:34:03,425 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-09-01 03:34:03,427 INFO L83 FinitePrefix]: Finished finitePrefix Result has 321 conditions, 308 events. 25/308 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 402 event pairs, 0 based on Foata normal form. 0/240 useless extension candidates. Maximal degree in co-relation 240. Up to 2 conditions per place. [2023-09-01 03:34:03,431 INFO L119 LiptonReduction]: Number of co-enabled transitions 4560 [2023-09-01 03:34:31,021 INFO L134 LiptonReduction]: Checked pairs total: 12952 [2023-09-01 03:34:31,021 INFO L136 LiptonReduction]: Total number of compositions: 335 [2023-09-01 03:34:31,033 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-09-01 03:34:31,039 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;@7a18812e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 03:34:31,040 INFO L358 AbstractCegarLoop]: Starting to check reachability of 65 error locations. [2023-09-01 03:34:31,042 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-09-01 03:34:31,042 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 03:34:31,043 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:34:31,043 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-09-01 03:34:31,043 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2023-09-01 03:34:31,050 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:34:31,050 INFO L85 PathProgramCache]: Analyzing trace with hash 37267, now seen corresponding path program 1 times [2023-09-01 03:34:31,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:34:31,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1087441585] [2023-09-01 03:34:31,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:34:31,063 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:34:31,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:34:31,066 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:34:31,078 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-09-01 03:34:31,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:34:31,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 3 conjunts are in the unsatisfiable core [2023-09-01 03:34:31,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:34:31,381 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-09-01 03:34:31,382 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2023-09-01 03:34:31,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:34:31,423 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:34:31,423 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:34:31,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1087441585] [2023-09-01 03:34:31,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1087441585] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:34:31,424 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:34:31,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 03:34:31,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174747996] [2023-09-01 03:34:31,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:34:31,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 03:34:31,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:34:31,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 03:34:31,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 03:34:31,727 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 271 out of 650 [2023-09-01 03:34:31,730 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 79 transitions, 176 flow. Second operand has 3 states, 3 states have (on average 271.6666666666667) internal successors, (815), 3 states have internal predecessors, (815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:34:31,731 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:34:31,731 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 271 of 650 [2023-09-01 03:34:31,732 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:34:34,637 INFO L130 PetriNetUnfolder]: 18697/23672 cut-off events. [2023-09-01 03:34:34,637 INFO L131 PetriNetUnfolder]: For 253/253 co-relation queries the response was YES. [2023-09-01 03:34:34,662 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47526 conditions, 23672 events. 18697/23672 cut-off events. For 253/253 co-relation queries the response was YES. Maximal size of possible extension queue 2005. Compared 123645 event pairs, 10917 based on Foata normal form. 0/6580 useless extension candidates. Maximal degree in co-relation 43964. Up to 23516 conditions per place. [2023-09-01 03:34:34,784 INFO L137 encePairwiseOnDemand]: 644/650 looper letters, 67 selfloop transitions, 1 changer transitions 0/74 dead transitions. [2023-09-01 03:34:34,784 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 74 transitions, 302 flow [2023-09-01 03:34:34,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 03:34:34,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 03:34:34,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 886 transitions. [2023-09-01 03:34:34,806 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4543589743589744 [2023-09-01 03:34:34,806 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 886 transitions. [2023-09-01 03:34:34,807 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 886 transitions. [2023-09-01 03:34:34,810 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:34:34,812 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 886 transitions. [2023-09-01 03:34:34,818 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 295.3333333333333) internal successors, (886), 3 states have internal predecessors, (886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:34:34,824 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 650.0) internal successors, (2600), 4 states have internal predecessors, (2600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:34:34,825 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 650.0) internal successors, (2600), 4 states have internal predecessors, (2600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:34:34,827 INFO L175 Difference]: Start difference. First operand has 82 places, 79 transitions, 176 flow. Second operand 3 states and 886 transitions. [2023-09-01 03:34:34,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 74 transitions, 302 flow [2023-09-01 03:34:34,835 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 74 transitions, 290 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-09-01 03:34:34,837 INFO L231 Difference]: Finished difference. Result has 73 places, 74 transitions, 156 flow [2023-09-01 03:34:34,838 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=650, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=156, PETRI_PLACES=73, PETRI_TRANSITIONS=74} [2023-09-01 03:34:34,841 INFO L281 CegarLoopForPetriNet]: 82 programPoint places, -9 predicate places. [2023-09-01 03:34:34,841 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 74 transitions, 156 flow [2023-09-01 03:34:34,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 271.6666666666667) internal successors, (815), 3 states have internal predecessors, (815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:34:34,842 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:34:34,842 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-09-01 03:34:34,856 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2023-09-01 03:34:35,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:34:35,052 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2023-09-01 03:34:35,052 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:34:35,052 INFO L85 PathProgramCache]: Analyzing trace with hash 37268, now seen corresponding path program 1 times [2023-09-01 03:34:35,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:34:35,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1352058161] [2023-09-01 03:34:35,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:34:35,053 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:34:35,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:34:35,060 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:34:35,063 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-09-01 03:34:35,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:34:35,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 9 conjunts are in the unsatisfiable core [2023-09-01 03:34:35,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:34:35,230 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-09-01 03:34:35,230 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-09-01 03:34:35,264 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:34:35,264 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:34:35,264 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:34:35,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1352058161] [2023-09-01 03:34:35,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1352058161] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:34:35,265 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:34:35,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 03:34:35,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416786331] [2023-09-01 03:34:35,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:34:35,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 03:34:35,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:34:35,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 03:34:35,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 03:34:35,697 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 271 out of 650 [2023-09-01 03:34:35,699 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 74 transitions, 156 flow. Second operand has 3 states, 3 states have (on average 271.6666666666667) internal successors, (815), 3 states have internal predecessors, (815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:34:35,699 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:34:35,699 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 271 of 650 [2023-09-01 03:34:35,699 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:34:39,651 INFO L130 PetriNetUnfolder]: 37393/47339 cut-off events. [2023-09-01 03:34:39,651 INFO L131 PetriNetUnfolder]: For 88/88 co-relation queries the response was YES. [2023-09-01 03:34:39,683 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94592 conditions, 47339 events. 37393/47339 cut-off events. For 88/88 co-relation queries the response was YES. Maximal size of possible extension queue 3645. Compared 266539 event pairs, 21834 based on Foata normal form. 0/13182 useless extension candidates. Maximal degree in co-relation 94586. Up to 23517 conditions per place. [2023-09-01 03:34:39,923 INFO L137 encePairwiseOnDemand]: 638/650 looper letters, 123 selfloop transitions, 8 changer transitions 0/137 dead transitions. [2023-09-01 03:34:39,924 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 137 transitions, 550 flow [2023-09-01 03:34:39,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 03:34:39,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 03:34:39,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 948 transitions. [2023-09-01 03:34:39,930 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48615384615384616 [2023-09-01 03:34:39,930 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 948 transitions. [2023-09-01 03:34:39,931 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 948 transitions. [2023-09-01 03:34:39,931 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:34:39,931 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 948 transitions. [2023-09-01 03:34:39,934 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 316.0) internal successors, (948), 3 states have internal predecessors, (948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:34:39,937 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 650.0) internal successors, (2600), 4 states have internal predecessors, (2600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:34:39,939 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 650.0) internal successors, (2600), 4 states have internal predecessors, (2600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:34:39,939 INFO L175 Difference]: Start difference. First operand has 73 places, 74 transitions, 156 flow. Second operand 3 states and 948 transitions. [2023-09-01 03:34:39,939 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 137 transitions, 550 flow [2023-09-01 03:34:39,941 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 137 transitions, 549 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 03:34:39,943 INFO L231 Difference]: Finished difference. Result has 76 places, 81 transitions, 223 flow [2023-09-01 03:34:39,944 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=650, PETRI_DIFFERENCE_MINUEND_FLOW=155, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=223, PETRI_PLACES=76, PETRI_TRANSITIONS=81} [2023-09-01 03:34:39,945 INFO L281 CegarLoopForPetriNet]: 82 programPoint places, -6 predicate places. [2023-09-01 03:34:39,945 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 81 transitions, 223 flow [2023-09-01 03:34:39,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 271.6666666666667) internal successors, (815), 3 states have internal predecessors, (815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:34:39,947 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:34:39,947 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-09-01 03:34:39,956 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 (3)] Ended with exit code 0 [2023-09-01 03:34:40,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:34:40,157 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2023-09-01 03:34:40,157 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:34:40,157 INFO L85 PathProgramCache]: Analyzing trace with hash 1160367, now seen corresponding path program 1 times [2023-09-01 03:34:40,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:34:40,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1502047048] [2023-09-01 03:34:40,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:34:40,158 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:34:40,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:34:40,167 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:34:40,168 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-09-01 03:34:40,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:34:40,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 11 conjunts are in the unsatisfiable core [2023-09-01 03:34:40,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:34:40,328 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-09-01 03:34:40,328 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-09-01 03:34:40,390 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:34:40,391 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:34:40,579 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:34:40,579 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:34:40,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1502047048] [2023-09-01 03:34:40,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1502047048] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:34:40,579 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:34:40,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-09-01 03:34:40,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160055578] [2023-09-01 03:34:40,580 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:34:40,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-09-01 03:34:40,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:34:40,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-09-01 03:34:40,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-09-01 03:34:42,217 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 251 out of 650 [2023-09-01 03:34:42,219 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 81 transitions, 223 flow. Second operand has 6 states, 6 states have (on average 252.0) internal successors, (1512), 6 states have internal predecessors, (1512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:34:42,219 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:34:42,219 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 251 of 650 [2023-09-01 03:34:42,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:34:49,077 INFO L130 PetriNetUnfolder]: 56101/71026 cut-off events. [2023-09-01 03:34:49,077 INFO L131 PetriNetUnfolder]: For 125/125 co-relation queries the response was YES. [2023-09-01 03:34:49,129 INFO L83 FinitePrefix]: Finished finitePrefix Result has 141979 conditions, 71026 events. 56101/71026 cut-off events. For 125/125 co-relation queries the response was YES. Maximal size of possible extension queue 5264. Compared 414178 event pairs, 32751 based on Foata normal form. 0/20068 useless extension candidates. Maximal degree in co-relation 141970. Up to 23520 conditions per place. [2023-09-01 03:34:49,361 INFO L137 encePairwiseOnDemand]: 635/650 looper letters, 179 selfloop transitions, 35 changer transitions 0/220 dead transitions. [2023-09-01 03:34:49,361 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 220 transitions, 1001 flow [2023-09-01 03:34:49,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 03:34:49,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 03:34:49,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1732 transitions. [2023-09-01 03:34:49,370 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4441025641025641 [2023-09-01 03:34:49,370 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1732 transitions. [2023-09-01 03:34:49,370 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1732 transitions. [2023-09-01 03:34:49,371 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:34:49,371 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1732 transitions. [2023-09-01 03:34:49,375 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 288.6666666666667) internal successors, (1732), 6 states have internal predecessors, (1732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:34:49,381 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 650.0) internal successors, (4550), 7 states have internal predecessors, (4550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:34:49,382 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 650.0) internal successors, (4550), 7 states have internal predecessors, (4550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:34:49,383 INFO L175 Difference]: Start difference. First operand has 76 places, 81 transitions, 223 flow. Second operand 6 states and 1732 transitions. [2023-09-01 03:34:49,383 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 220 transitions, 1001 flow [2023-09-01 03:34:49,385 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 220 transitions, 967 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 03:34:49,387 INFO L231 Difference]: Finished difference. Result has 83 places, 108 transitions, 470 flow [2023-09-01 03:34:49,388 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=650, PETRI_DIFFERENCE_MINUEND_FLOW=207, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=470, PETRI_PLACES=83, PETRI_TRANSITIONS=108} [2023-09-01 03:34:49,388 INFO L281 CegarLoopForPetriNet]: 82 programPoint places, 1 predicate places. [2023-09-01 03:34:49,389 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 108 transitions, 470 flow [2023-09-01 03:34:49,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 252.0) internal successors, (1512), 6 states have internal predecessors, (1512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:34:49,390 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:34:49,390 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-09-01 03:34:49,399 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2023-09-01 03:34:49,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:34:49,599 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2023-09-01 03:34:49,600 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:34:49,600 INFO L85 PathProgramCache]: Analyzing trace with hash 1116469546, now seen corresponding path program 1 times [2023-09-01 03:34:49,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:34:49,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [306615195] [2023-09-01 03:34:49,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:34:49,601 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:34:49,601 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:34:49,604 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:34:49,605 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-09-01 03:34:49,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:34:49,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 18 conjunts are in the unsatisfiable core [2023-09-01 03:34:49,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:34:49,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:34:49,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:34:49,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:34:49,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:34:49,814 INFO L321 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2023-09-01 03:34:49,815 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 29 [2023-09-01 03:34:49,839 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-09-01 03:34:49,839 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2023-09-01 03:34:49,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:34:49,895 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-09-01 03:34:49,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:34:49,927 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-09-01 03:34:49,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:34:49,969 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-09-01 03:34:50,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:34:50,009 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:34:50,010 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:34:50,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [306615195] [2023-09-01 03:34:50,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [306615195] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:34:50,010 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:34:50,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 03:34:50,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865712551] [2023-09-01 03:34:50,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:34:50,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 03:34:50,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:34:50,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 03:34:50,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-09-01 03:34:50,425 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 281 out of 650 [2023-09-01 03:34:50,427 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 108 transitions, 470 flow. Second operand has 4 states, 4 states have (on average 282.25) internal successors, (1129), 4 states have internal predecessors, (1129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:34:50,427 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:34:50,427 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 281 of 650 [2023-09-01 03:34:50,427 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:34:54,590 INFO L130 PetriNetUnfolder]: 42809/54731 cut-off events. [2023-09-01 03:34:54,591 INFO L131 PetriNetUnfolder]: For 163/163 co-relation queries the response was YES. [2023-09-01 03:34:54,647 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109465 conditions, 54731 events. 42809/54731 cut-off events. For 163/163 co-relation queries the response was YES. Maximal size of possible extension queue 4281. Compared 322125 event pairs, 24861 based on Foata normal form. 0/16377 useless extension candidates. Maximal degree in co-relation 109452. Up to 54263 conditions per place. [2023-09-01 03:34:54,857 INFO L137 encePairwiseOnDemand]: 647/650 looper letters, 97 selfloop transitions, 1 changer transitions 0/104 dead transitions. [2023-09-01 03:34:54,858 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 104 transitions, 646 flow [2023-09-01 03:34:54,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 03:34:54,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 03:34:54,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 911 transitions. [2023-09-01 03:34:54,862 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46717948717948715 [2023-09-01 03:34:54,862 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 911 transitions. [2023-09-01 03:34:54,862 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 911 transitions. [2023-09-01 03:34:54,863 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:34:54,863 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 911 transitions. [2023-09-01 03:34:54,865 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 303.6666666666667) internal successors, (911), 3 states have internal predecessors, (911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:34:54,869 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 650.0) internal successors, (2600), 4 states have internal predecessors, (2600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:34:54,870 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 650.0) internal successors, (2600), 4 states have internal predecessors, (2600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:34:54,870 INFO L175 Difference]: Start difference. First operand has 83 places, 108 transitions, 470 flow. Second operand 3 states and 911 transitions. [2023-09-01 03:34:54,870 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 104 transitions, 646 flow [2023-09-01 03:34:54,875 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 104 transitions, 605 flow, removed 12 selfloop flow, removed 1 redundant places. [2023-09-01 03:34:54,878 INFO L231 Difference]: Finished difference. Result has 82 places, 104 transitions, 411 flow [2023-09-01 03:34:54,878 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=650, PETRI_DIFFERENCE_MINUEND_FLOW=409, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=411, PETRI_PLACES=82, PETRI_TRANSITIONS=104} [2023-09-01 03:34:54,879 INFO L281 CegarLoopForPetriNet]: 82 programPoint places, 0 predicate places. [2023-09-01 03:34:54,879 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 104 transitions, 411 flow [2023-09-01 03:34:54,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 282.25) internal successors, (1129), 4 states have internal predecessors, (1129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:34:54,880 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:34:54,880 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-09-01 03:34:54,901 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2023-09-01 03:34:55,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:34:55,095 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2023-09-01 03:34:55,095 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:34:55,095 INFO L85 PathProgramCache]: Analyzing trace with hash 1116469544, now seen corresponding path program 1 times [2023-09-01 03:34:55,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:34:55,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [768576319] [2023-09-01 03:34:55,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:34:55,096 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:34:55,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:34:55,097 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:34:55,100 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2023-09-01 03:34:55,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:34:55,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 18 conjunts are in the unsatisfiable core [2023-09-01 03:34:55,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:34:55,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:34:55,292 INFO L321 Elim1Store]: treesize reduction 86, result has 25.9 percent of original size [2023-09-01 03:34:55,293 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 55 [2023-09-01 03:34:55,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:34:55,369 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 [2023-09-01 03:34:55,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:34:55,390 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 [2023-09-01 03:34:55,432 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-09-01 03:34:55,432 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-09-01 03:34:55,443 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:34:55,444 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:34:55,444 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:34:55,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [768576319] [2023-09-01 03:34:55,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [768576319] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:34:55,444 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:34:55,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 03:34:55,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752571162] [2023-09-01 03:34:55,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:34:55,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 03:34:55,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:34:55,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 03:34:55,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-09-01 03:34:55,820 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 282 out of 650 [2023-09-01 03:34:55,822 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 104 transitions, 411 flow. Second operand has 4 states, 4 states have (on average 283.25) internal successors, (1133), 4 states have internal predecessors, (1133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:34:55,822 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:34:55,822 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 282 of 650 [2023-09-01 03:34:55,822 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:34:58,813 INFO L130 PetriNetUnfolder]: 29517/38436 cut-off events. [2023-09-01 03:34:58,813 INFO L131 PetriNetUnfolder]: For 168/168 co-relation queries the response was YES. [2023-09-01 03:34:58,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76842 conditions, 38436 events. 29517/38436 cut-off events. For 168/168 co-relation queries the response was YES. Maximal size of possible extension queue 2915. Compared 228515 event pairs, 16971 based on Foata normal form. 0/12987 useless extension candidates. Maximal degree in co-relation 76828. Up to 37968 conditions per place. [2023-09-01 03:34:58,988 INFO L137 encePairwiseOnDemand]: 647/650 looper letters, 93 selfloop transitions, 1 changer transitions 0/100 dead transitions. [2023-09-01 03:34:58,989 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 100 transitions, 579 flow [2023-09-01 03:34:58,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 03:34:58,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 03:34:58,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 912 transitions. [2023-09-01 03:34:58,993 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4676923076923077 [2023-09-01 03:34:58,993 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 912 transitions. [2023-09-01 03:34:58,994 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 912 transitions. [2023-09-01 03:34:58,994 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:34:58,994 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 912 transitions. [2023-09-01 03:34:58,996 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 304.0) internal successors, (912), 3 states have internal predecessors, (912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:34:58,999 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 650.0) internal successors, (2600), 4 states have internal predecessors, (2600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:34:59,001 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 650.0) internal successors, (2600), 4 states have internal predecessors, (2600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:34:59,001 INFO L175 Difference]: Start difference. First operand has 82 places, 104 transitions, 411 flow. Second operand 3 states and 912 transitions. [2023-09-01 03:34:59,001 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 100 transitions, 579 flow [2023-09-01 03:34:59,002 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 100 transitions, 578 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 03:34:59,004 INFO L231 Difference]: Finished difference. Result has 81 places, 100 transitions, 392 flow [2023-09-01 03:34:59,004 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=650, PETRI_DIFFERENCE_MINUEND_FLOW=390, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=392, PETRI_PLACES=81, PETRI_TRANSITIONS=100} [2023-09-01 03:34:59,005 INFO L281 CegarLoopForPetriNet]: 82 programPoint places, -1 predicate places. [2023-09-01 03:34:59,005 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 100 transitions, 392 flow [2023-09-01 03:34:59,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 283.25) internal successors, (1133), 4 states have internal predecessors, (1133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:34:59,006 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:34:59,006 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-09-01 03:34:59,018 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2023-09-01 03:34:59,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:34:59,218 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2023-09-01 03:34:59,219 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:34:59,219 INFO L85 PathProgramCache]: Analyzing trace with hash 213778516, now seen corresponding path program 2 times [2023-09-01 03:34:59,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:34:59,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1831689451] [2023-09-01 03:34:59,220 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 03:34:59,220 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:34:59,220 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:34:59,221 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:34:59,223 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2023-09-01 03:34:59,304 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 03:34:59,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 03:34:59,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 13 conjunts are in the unsatisfiable core [2023-09-01 03:34:59,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:34:59,402 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-09-01 03:34:59,403 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-09-01 03:34:59,529 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:34:59,530 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:34:59,958 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:34:59,959 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:34:59,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1831689451] [2023-09-01 03:34:59,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1831689451] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:34:59,961 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:34:59,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-09-01 03:34:59,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207568228] [2023-09-01 03:34:59,962 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:34:59,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 03:34:59,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:34:59,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 03:34:59,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-09-01 03:35:06,957 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 255 out of 650 [2023-09-01 03:35:06,960 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 100 transitions, 392 flow. Second operand has 12 states, 12 states have (on average 256.0) internal successors, (3072), 12 states have internal predecessors, (3072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:35:06,960 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:35:06,960 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 255 of 650 [2023-09-01 03:35:06,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:35:09,342 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.49s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:35:10,604 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:35:12,584 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:35:14,228 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:35:15,519 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:35:17,319 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:35:19,064 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.74s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:35:21,776 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.97s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:35:25,177 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.63s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:35:26,532 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:35:28,623 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.38s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:35:31,167 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.64s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:35:34,498 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.68s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:35:36,113 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.61s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:35:39,745 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:35:54,341 INFO L130 PetriNetUnfolder]: 98365/128063 cut-off events. [2023-09-01 03:35:54,341 INFO L131 PetriNetUnfolder]: For 471/471 co-relation queries the response was YES. [2023-09-01 03:35:54,507 INFO L83 FinitePrefix]: Finished finitePrefix Result has 255878 conditions, 128063 events. 98365/128063 cut-off events. For 471/471 co-relation queries the response was YES. Maximal size of possible extension queue 5601. Compared 828092 event pairs, 56570 based on Foata normal form. 24/44381 useless extension candidates. Maximal degree in co-relation 255863. Up to 12676 conditions per place. [2023-09-01 03:35:54,911 INFO L137 encePairwiseOnDemand]: 637/650 looper letters, 531 selfloop transitions, 72 changer transitions 0/609 dead transitions. [2023-09-01 03:35:54,911 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 609 transitions, 2870 flow [2023-09-01 03:35:54,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-09-01 03:35:54,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-09-01 03:35:54,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 3687 transitions. [2023-09-01 03:35:54,921 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4726923076923077 [2023-09-01 03:35:54,921 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 3687 transitions. [2023-09-01 03:35:54,921 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 3687 transitions. [2023-09-01 03:35:54,923 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:35:54,923 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 3687 transitions. [2023-09-01 03:35:54,930 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 307.25) internal successors, (3687), 12 states have internal predecessors, (3687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:35:54,939 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 650.0) internal successors, (8450), 13 states have internal predecessors, (8450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:35:54,941 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 650.0) internal successors, (8450), 13 states have internal predecessors, (8450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:35:54,941 INFO L175 Difference]: Start difference. First operand has 81 places, 100 transitions, 392 flow. Second operand 12 states and 3687 transitions. [2023-09-01 03:35:54,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 609 transitions, 2870 flow [2023-09-01 03:35:54,945 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 609 transitions, 2869 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 03:35:54,949 INFO L231 Difference]: Finished difference. Result has 98 places, 143 transitions, 927 flow [2023-09-01 03:35:54,949 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=650, PETRI_DIFFERENCE_MINUEND_FLOW=391, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=927, PETRI_PLACES=98, PETRI_TRANSITIONS=143} [2023-09-01 03:35:54,950 INFO L281 CegarLoopForPetriNet]: 82 programPoint places, 16 predicate places. [2023-09-01 03:35:54,950 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 143 transitions, 927 flow [2023-09-01 03:35:54,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 256.0) internal successors, (3072), 12 states have internal predecessors, (3072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:35:54,951 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:35:54,952 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:35:54,965 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2023-09-01 03:35:55,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:35:55,161 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2023-09-01 03:35:55,161 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:35:55,161 INFO L85 PathProgramCache]: Analyzing trace with hash -814565407, now seen corresponding path program 1 times [2023-09-01 03:35:55,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:35:55,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [564974196] [2023-09-01 03:35:55,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:35:55,162 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:35:55,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:35:55,163 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:35:55,164 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2023-09-01 03:35:55,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:35:55,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 17 conjunts are in the unsatisfiable core [2023-09-01 03:35:55,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:35:55,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:35:55,319 INFO L321 Elim1Store]: treesize reduction 79, result has 27.5 percent of original size [2023-09-01 03:35:55,319 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 4 case distinctions, treesize of input 29 treesize of output 48 [2023-09-01 03:35:55,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:35:55,380 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 [2023-09-01 03:35:55,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:35:55,410 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 [2023-09-01 03:35:55,436 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-09-01 03:35:55,436 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-09-01 03:35:55,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:35:55,467 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:35:55,467 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:35:55,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [564974196] [2023-09-01 03:35:55,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [564974196] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:35:55,467 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:35:55,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 03:35:55,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863322072] [2023-09-01 03:35:55,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:35:55,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 03:35:55,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:35:55,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 03:35:55,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-09-01 03:35:55,769 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 282 out of 650 [2023-09-01 03:35:55,770 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 143 transitions, 927 flow. Second operand has 4 states, 4 states have (on average 283.75) internal successors, (1135), 4 states have internal predecessors, (1135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:35:55,771 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:35:55,771 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 282 of 650 [2023-09-01 03:35:55,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:36:05,762 INFO L130 PetriNetUnfolder]: 95225/123823 cut-off events. [2023-09-01 03:36:05,762 INFO L131 PetriNetUnfolder]: For 642/642 co-relation queries the response was YES. [2023-09-01 03:36:06,032 INFO L83 FinitePrefix]: Finished finitePrefix Result has 247557 conditions, 123823 events. 95225/123823 cut-off events. For 642/642 co-relation queries the response was YES. Maximal size of possible extension queue 5140. Compared 797354 event pairs, 54690 based on Foata normal form. 0/42410 useless extension candidates. Maximal degree in co-relation 247534. Up to 122263 conditions per place. [2023-09-01 03:36:06,506 INFO L137 encePairwiseOnDemand]: 647/650 looper letters, 134 selfloop transitions, 1 changer transitions 0/141 dead transitions. [2023-09-01 03:36:06,506 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 141 transitions, 1193 flow [2023-09-01 03:36:06,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 03:36:06,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 03:36:06,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 910 transitions. [2023-09-01 03:36:06,510 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4666666666666667 [2023-09-01 03:36:06,510 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 910 transitions. [2023-09-01 03:36:06,510 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 910 transitions. [2023-09-01 03:36:06,511 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:36:06,511 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 910 transitions. [2023-09-01 03:36:06,512 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 303.3333333333333) internal successors, (910), 3 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:36:06,515 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 650.0) internal successors, (2600), 4 states have internal predecessors, (2600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:36:06,516 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 650.0) internal successors, (2600), 4 states have internal predecessors, (2600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:36:06,516 INFO L175 Difference]: Start difference. First operand has 98 places, 143 transitions, 927 flow. Second operand 3 states and 910 transitions. [2023-09-01 03:36:06,516 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 141 transitions, 1193 flow [2023-09-01 03:36:06,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 141 transitions, 1066 flow, removed 28 selfloop flow, removed 4 redundant places. [2023-09-01 03:36:06,522 INFO L231 Difference]: Finished difference. Result has 94 places, 141 transitions, 798 flow [2023-09-01 03:36:06,522 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=650, PETRI_DIFFERENCE_MINUEND_FLOW=796, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=798, PETRI_PLACES=94, PETRI_TRANSITIONS=141} [2023-09-01 03:36:06,523 INFO L281 CegarLoopForPetriNet]: 82 programPoint places, 12 predicate places. [2023-09-01 03:36:06,523 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 141 transitions, 798 flow [2023-09-01 03:36:06,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 283.75) internal successors, (1135), 4 states have internal predecessors, (1135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:36:06,524 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:36:06,524 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:36:06,537 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2023-09-01 03:36:06,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:36:06,734 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2023-09-01 03:36:06,735 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:36:06,735 INFO L85 PathProgramCache]: Analyzing trace with hash -814565408, now seen corresponding path program 1 times [2023-09-01 03:36:06,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:36:06,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [717607572] [2023-09-01 03:36:06,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:36:06,735 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:36:06,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:36:06,737 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:36:06,745 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2023-09-01 03:36:06,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:36:06,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 18 conjunts are in the unsatisfiable core [2023-09-01 03:36:06,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:36:06,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:36:06,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:36:06,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:36:06,925 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2023-09-01 03:36:06,926 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 32 [2023-09-01 03:36:06,956 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2023-09-01 03:36:07,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:36:07,012 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-09-01 03:36:07,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:36:07,034 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-09-01 03:36:07,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:36:07,059 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-09-01 03:36:07,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:36:07,105 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:36:07,105 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:36:07,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [717607572] [2023-09-01 03:36:07,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [717607572] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:36:07,106 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:36:07,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 03:36:07,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307881629] [2023-09-01 03:36:07,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:36:07,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 03:36:07,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:36:07,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 03:36:07,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-09-01 03:36:07,462 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 281 out of 650 [2023-09-01 03:36:07,463 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 141 transitions, 798 flow. Second operand has 4 states, 4 states have (on average 282.75) internal successors, (1131), 4 states have internal predecessors, (1131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:36:07,463 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:36:07,463 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 281 of 650 [2023-09-01 03:36:07,463 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:36:17,081 INFO L130 PetriNetUnfolder]: 92085/119583 cut-off events. [2023-09-01 03:36:17,081 INFO L131 PetriNetUnfolder]: For 667/667 co-relation queries the response was YES. [2023-09-01 03:36:17,304 INFO L83 FinitePrefix]: Finished finitePrefix Result has 239000 conditions, 119583 events. 92085/119583 cut-off events. For 667/667 co-relation queries the response was YES. Maximal size of possible extension queue 4961. Compared 764237 event pairs, 52810 based on Foata normal form. 0/41583 useless extension candidates. Maximal degree in co-relation 238976. Up to 118023 conditions per place. [2023-09-01 03:36:17,649 INFO L137 encePairwiseOnDemand]: 647/650 looper letters, 132 selfloop transitions, 1 changer transitions 0/139 dead transitions. [2023-09-01 03:36:17,649 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 139 transitions, 1060 flow [2023-09-01 03:36:17,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 03:36:17,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 03:36:17,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 905 transitions. [2023-09-01 03:36:17,652 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4641025641025641 [2023-09-01 03:36:17,653 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 905 transitions. [2023-09-01 03:36:17,653 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 905 transitions. [2023-09-01 03:36:17,653 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:36:17,653 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 905 transitions. [2023-09-01 03:36:17,655 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 301.6666666666667) internal successors, (905), 3 states have internal predecessors, (905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:36:17,657 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 650.0) internal successors, (2600), 4 states have internal predecessors, (2600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:36:17,658 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 650.0) internal successors, (2600), 4 states have internal predecessors, (2600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:36:17,658 INFO L175 Difference]: Start difference. First operand has 94 places, 141 transitions, 798 flow. Second operand 3 states and 905 transitions. [2023-09-01 03:36:17,658 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 139 transitions, 1060 flow [2023-09-01 03:36:17,661 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 139 transitions, 1059 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 03:36:17,663 INFO L231 Difference]: Finished difference. Result has 93 places, 139 transitions, 795 flow [2023-09-01 03:36:17,663 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=650, PETRI_DIFFERENCE_MINUEND_FLOW=793, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=795, PETRI_PLACES=93, PETRI_TRANSITIONS=139} [2023-09-01 03:36:17,664 INFO L281 CegarLoopForPetriNet]: 82 programPoint places, 11 predicate places. [2023-09-01 03:36:17,664 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 139 transitions, 795 flow [2023-09-01 03:36:17,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 282.75) internal successors, (1131), 4 states have internal predecessors, (1131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:36:17,665 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:36:17,665 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:36:17,677 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2023-09-01 03:36:17,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:36:17,873 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2023-09-01 03:36:17,873 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:36:17,874 INFO L85 PathProgramCache]: Analyzing trace with hash 518267548, now seen corresponding path program 1 times [2023-09-01 03:36:17,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:36:17,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [987339892] [2023-09-01 03:36:17,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:36:17,874 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:36:17,875 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:36:17,875 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:36:17,877 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2023-09-01 03:36:17,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:36:17,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 9 conjunts are in the unsatisfiable core [2023-09-01 03:36:17,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:36:18,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:36:18,020 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:36:18,020 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:36:18,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [987339892] [2023-09-01 03:36:18,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [987339892] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:36:18,020 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:36:18,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 03:36:18,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783289092] [2023-09-01 03:36:18,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:36:18,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 03:36:18,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:36:18,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 03:36:18,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-09-01 03:36:18,232 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 269 out of 650 [2023-09-01 03:36:18,246 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 139 transitions, 795 flow. Second operand has 5 states, 5 states have (on average 270.6) internal successors, (1353), 5 states have internal predecessors, (1353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:36:18,246 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:36:18,246 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 269 of 650 [2023-09-01 03:36:18,247 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:36:26,820 INFO L130 PetriNetUnfolder]: 75036/100838 cut-off events. [2023-09-01 03:36:26,820 INFO L131 PetriNetUnfolder]: For 590/590 co-relation queries the response was YES. [2023-09-01 03:36:27,029 INFO L83 FinitePrefix]: Finished finitePrefix Result has 201508 conditions, 100838 events. 75036/100838 cut-off events. For 590/590 co-relation queries the response was YES. Maximal size of possible extension queue 4635. Compared 675131 event pairs, 48743 based on Foata normal form. 4/40476 useless extension candidates. Maximal degree in co-relation 201483. Up to 95594 conditions per place. [2023-09-01 03:36:27,358 INFO L137 encePairwiseOnDemand]: 630/650 looper letters, 157 selfloop transitions, 40 changer transitions 1/203 dead transitions. [2023-09-01 03:36:27,359 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 203 transitions, 1339 flow [2023-09-01 03:36:27,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 03:36:27,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 03:36:27,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1490 transitions. [2023-09-01 03:36:27,363 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4584615384615385 [2023-09-01 03:36:27,363 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1490 transitions. [2023-09-01 03:36:27,363 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1490 transitions. [2023-09-01 03:36:27,364 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:36:27,364 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1490 transitions. [2023-09-01 03:36:27,367 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 298.0) internal successors, (1490), 5 states have internal predecessors, (1490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:36:27,370 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 650.0) internal successors, (3900), 6 states have internal predecessors, (3900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:36:27,371 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 650.0) internal successors, (3900), 6 states have internal predecessors, (3900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:36:27,371 INFO L175 Difference]: Start difference. First operand has 93 places, 139 transitions, 795 flow. Second operand 5 states and 1490 transitions. [2023-09-01 03:36:27,371 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 203 transitions, 1339 flow [2023-09-01 03:36:27,375 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 203 transitions, 1338 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 03:36:27,378 INFO L231 Difference]: Finished difference. Result has 99 places, 143 transitions, 963 flow [2023-09-01 03:36:27,378 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=650, PETRI_DIFFERENCE_MINUEND_FLOW=794, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=963, PETRI_PLACES=99, PETRI_TRANSITIONS=143} [2023-09-01 03:36:27,379 INFO L281 CegarLoopForPetriNet]: 82 programPoint places, 17 predicate places. [2023-09-01 03:36:27,379 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 143 transitions, 963 flow [2023-09-01 03:36:27,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 270.6) internal successors, (1353), 5 states have internal predecessors, (1353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:36:27,379 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:36:27,380 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:36:27,393 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 [2023-09-01 03:36:27,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:36:27,589 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2023-09-01 03:36:27,590 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:36:27,590 INFO L85 PathProgramCache]: Analyzing trace with hash -1113281493, now seen corresponding path program 1 times [2023-09-01 03:36:27,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:36:27,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [614126243] [2023-09-01 03:36:27,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:36:27,590 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:36:27,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:36:27,591 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:36:27,592 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2023-09-01 03:36:27,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:36:27,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 19 conjunts are in the unsatisfiable core [2023-09-01 03:36:27,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:36:27,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:36:27,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:36:27,759 INFO L321 Elim1Store]: treesize reduction 89, result has 14.4 percent of original size [2023-09-01 03:36:27,760 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 2 case distinctions, treesize of input 29 treesize of output 40 [2023-09-01 03:36:27,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:36:27,873 INFO L321 Elim1Store]: treesize reduction 54, result has 29.9 percent of original size [2023-09-01 03:36:27,873 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 28 treesize of output 52 [2023-09-01 03:36:28,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:36:28,155 INFO L321 Elim1Store]: treesize reduction 54, result has 29.9 percent of original size [2023-09-01 03:36:28,155 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 28 treesize of output 52 [2023-09-01 03:36:28,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:36:28,387 INFO L321 Elim1Store]: treesize reduction 62, result has 19.5 percent of original size [2023-09-01 03:36:28,387 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 28 treesize of output 44 [2023-09-01 03:36:28,805 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:36:28,805 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:36:28,805 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:36:28,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [614126243] [2023-09-01 03:36:28,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [614126243] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:36:28,805 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:36:28,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 03:36:28,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016844281] [2023-09-01 03:36:28,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:36:28,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 03:36:28,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:36:28,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 03:36:28,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 03:36:30,761 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 276 out of 650 [2023-09-01 03:36:30,761 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 143 transitions, 963 flow. Second operand has 4 states, 4 states have (on average 278.25) internal successors, (1113), 4 states have internal predecessors, (1113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:36:30,762 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:36:30,762 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 276 of 650 [2023-09-01 03:36:30,762 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:36:40,647 INFO L130 PetriNetUnfolder]: 83707/107997 cut-off events. [2023-09-01 03:36:40,647 INFO L131 PetriNetUnfolder]: For 2842/3064 co-relation queries the response was YES. [2023-09-01 03:36:40,972 INFO L83 FinitePrefix]: Finished finitePrefix Result has 236832 conditions, 107997 events. 83707/107997 cut-off events. For 2842/3064 co-relation queries the response was YES. Maximal size of possible extension queue 4747. Compared 684187 event pairs, 47473 based on Foata normal form. 222/42703 useless extension candidates. Maximal degree in co-relation 236803. Up to 106938 conditions per place. [2023-09-01 03:36:41,344 INFO L137 encePairwiseOnDemand]: 647/650 looper letters, 133 selfloop transitions, 1 changer transitions 0/141 dead transitions. [2023-09-01 03:36:41,344 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 141 transitions, 1227 flow [2023-09-01 03:36:41,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 03:36:41,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 03:36:41,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 888 transitions. [2023-09-01 03:36:41,348 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4553846153846154 [2023-09-01 03:36:41,348 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 888 transitions. [2023-09-01 03:36:41,348 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 888 transitions. [2023-09-01 03:36:41,348 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:36:41,348 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 888 transitions. [2023-09-01 03:36:41,350 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 296.0) internal successors, (888), 3 states have internal predecessors, (888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:36:41,351 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 650.0) internal successors, (2600), 4 states have internal predecessors, (2600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:36:41,352 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 650.0) internal successors, (2600), 4 states have internal predecessors, (2600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:36:41,352 INFO L175 Difference]: Start difference. First operand has 99 places, 143 transitions, 963 flow. Second operand 3 states and 888 transitions. [2023-09-01 03:36:41,352 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 141 transitions, 1227 flow [2023-09-01 03:36:41,393 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 141 transitions, 1182 flow, removed 5 selfloop flow, removed 1 redundant places. [2023-09-01 03:36:41,395 INFO L231 Difference]: Finished difference. Result has 98 places, 141 transitions, 916 flow [2023-09-01 03:36:41,396 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=650, PETRI_DIFFERENCE_MINUEND_FLOW=914, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=916, PETRI_PLACES=98, PETRI_TRANSITIONS=141} [2023-09-01 03:36:41,396 INFO L281 CegarLoopForPetriNet]: 82 programPoint places, 16 predicate places. [2023-09-01 03:36:41,396 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 141 transitions, 916 flow [2023-09-01 03:36:41,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 278.25) internal successors, (1113), 4 states have internal predecessors, (1113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:36:41,397 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:36:41,397 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:36:41,405 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2023-09-01 03:36:41,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:36:41,599 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2023-09-01 03:36:41,599 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:36:41,600 INFO L85 PathProgramCache]: Analyzing trace with hash -1113281491, now seen corresponding path program 1 times [2023-09-01 03:36:41,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:36:41,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [218870120] [2023-09-01 03:36:41,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:36:41,600 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:36:41,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:36:41,601 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:36:41,602 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2023-09-01 03:36:41,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:36:41,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 25 conjunts are in the unsatisfiable core [2023-09-01 03:36:41,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:36:41,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:36:41,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:36:41,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:36:41,776 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2023-09-01 03:36:41,776 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 32 [2023-09-01 03:36:41,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:36:41,802 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2023-09-01 03:36:41,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:36:41,850 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-09-01 03:36:41,856 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-09-01 03:36:41,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:36:41,919 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-09-01 03:36:41,936 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-09-01 03:36:41,936 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-09-01 03:36:41,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:36:41,982 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-09-01 03:36:42,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:36:42,126 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:36:42,127 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:36:42,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [218870120] [2023-09-01 03:36:42,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [218870120] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:36:42,127 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:36:42,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 03:36:42,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307331184] [2023-09-01 03:36:42,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:36:42,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-09-01 03:36:42,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:36:42,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-09-01 03:36:42,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-09-01 03:36:43,385 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 276 out of 650 [2023-09-01 03:36:43,386 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 141 transitions, 916 flow. Second operand has 6 states, 6 states have (on average 277.5) internal successors, (1665), 6 states have internal predecessors, (1665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:36:43,386 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:36:43,386 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 276 of 650 [2023-09-01 03:36:43,386 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:36:52,448 INFO L130 PetriNetUnfolder]: 80882/104152 cut-off events. [2023-09-01 03:36:52,448 INFO L131 PetriNetUnfolder]: For 2812/3024 co-relation queries the response was YES. [2023-09-01 03:36:52,746 INFO L83 FinitePrefix]: Finished finitePrefix Result has 228234 conditions, 104152 events. 80882/104152 cut-off events. For 2812/3024 co-relation queries the response was YES. Maximal size of possible extension queue 4567. Compared 645247 event pairs, 45800 based on Foata normal form. 212/41739 useless extension candidates. Maximal degree in co-relation 228204. Up to 103093 conditions per place. [2023-09-01 03:36:53,093 INFO L137 encePairwiseOnDemand]: 647/650 looper letters, 131 selfloop transitions, 1 changer transitions 0/139 dead transitions. [2023-09-01 03:36:53,093 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 139 transitions, 1176 flow [2023-09-01 03:36:53,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 03:36:53,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 03:36:53,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 886 transitions. [2023-09-01 03:36:53,096 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4543589743589744 [2023-09-01 03:36:53,097 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 886 transitions. [2023-09-01 03:36:53,097 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 886 transitions. [2023-09-01 03:36:53,097 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:36:53,097 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 886 transitions. [2023-09-01 03:36:53,098 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 295.3333333333333) internal successors, (886), 3 states have internal predecessors, (886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:36:53,100 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 650.0) internal successors, (2600), 4 states have internal predecessors, (2600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:36:53,101 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 650.0) internal successors, (2600), 4 states have internal predecessors, (2600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:36:53,101 INFO L175 Difference]: Start difference. First operand has 98 places, 141 transitions, 916 flow. Second operand 3 states and 886 transitions. [2023-09-01 03:36:53,101 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 139 transitions, 1176 flow [2023-09-01 03:36:53,133 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 139 transitions, 1175 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 03:36:53,135 INFO L231 Difference]: Finished difference. Result has 97 places, 139 transitions, 913 flow [2023-09-01 03:36:53,136 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=650, PETRI_DIFFERENCE_MINUEND_FLOW=911, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=913, PETRI_PLACES=97, PETRI_TRANSITIONS=139} [2023-09-01 03:36:53,136 INFO L281 CegarLoopForPetriNet]: 82 programPoint places, 15 predicate places. [2023-09-01 03:36:53,136 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 139 transitions, 913 flow [2023-09-01 03:36:53,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 277.5) internal successors, (1665), 6 states have internal predecessors, (1665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:36:53,137 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:36:53,137 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:36:53,149 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2023-09-01 03:36:53,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:36:53,347 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2023-09-01 03:36:53,347 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:36:53,347 INFO L85 PathProgramCache]: Analyzing trace with hash -151996514, now seen corresponding path program 1 times [2023-09-01 03:36:53,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:36:53,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [440845978] [2023-09-01 03:36:53,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:36:53,348 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:36:53,348 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:36:53,349 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:36:53,349 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2023-09-01 03:36:53,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:36:53,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 12 conjunts are in the unsatisfiable core [2023-09-01 03:36:53,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:36:53,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:36:53,512 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:36:53,512 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:36:53,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [440845978] [2023-09-01 03:36:53,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [440845978] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:36:53,513 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:36:53,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-09-01 03:36:53,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838166762] [2023-09-01 03:36:53,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:36:53,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-09-01 03:36:53,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:36:53,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-09-01 03:36:53,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-09-01 03:36:53,827 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 267 out of 650 [2023-09-01 03:36:53,828 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 139 transitions, 913 flow. Second operand has 7 states, 7 states have (on average 268.42857142857144) internal successors, (1879), 7 states have internal predecessors, (1879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:36:53,828 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:36:53,828 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 267 of 650 [2023-09-01 03:36:53,828 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:37:02,641 INFO L130 PetriNetUnfolder]: 71251/94446 cut-off events. [2023-09-01 03:37:02,641 INFO L131 PetriNetUnfolder]: For 3918/3983 co-relation queries the response was YES. [2023-09-01 03:37:02,910 INFO L83 FinitePrefix]: Finished finitePrefix Result has 209062 conditions, 94446 events. 71251/94446 cut-off events. For 3918/3983 co-relation queries the response was YES. Maximal size of possible extension queue 4420. Compared 617558 event pairs, 45571 based on Foata normal form. 65/42089 useless extension candidates. Maximal degree in co-relation 209031. Up to 92696 conditions per place. [2023-09-01 03:37:03,208 INFO L137 encePairwiseOnDemand]: 635/650 looper letters, 128 selfloop transitions, 41 changer transitions 3/178 dead transitions. [2023-09-01 03:37:03,208 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 178 transitions, 1349 flow [2023-09-01 03:37:03,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 03:37:03,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 03:37:03,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1713 transitions. [2023-09-01 03:37:03,211 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43923076923076926 [2023-09-01 03:37:03,211 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1713 transitions. [2023-09-01 03:37:03,212 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1713 transitions. [2023-09-01 03:37:03,212 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:37:03,212 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1713 transitions. [2023-09-01 03:37:03,214 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 285.5) internal successors, (1713), 6 states have internal predecessors, (1713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:37:03,217 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 650.0) internal successors, (4550), 7 states have internal predecessors, (4550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:37:03,217 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 650.0) internal successors, (4550), 7 states have internal predecessors, (4550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:37:03,217 INFO L175 Difference]: Start difference. First operand has 97 places, 139 transitions, 913 flow. Second operand 6 states and 1713 transitions. [2023-09-01 03:37:03,217 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 178 transitions, 1349 flow [2023-09-01 03:37:03,250 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 178 transitions, 1348 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 03:37:03,252 INFO L231 Difference]: Finished difference. Result has 104 places, 141 transitions, 1026 flow [2023-09-01 03:37:03,252 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=650, PETRI_DIFFERENCE_MINUEND_FLOW=912, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1026, PETRI_PLACES=104, PETRI_TRANSITIONS=141} [2023-09-01 03:37:03,254 INFO L281 CegarLoopForPetriNet]: 82 programPoint places, 22 predicate places. [2023-09-01 03:37:03,254 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 141 transitions, 1026 flow [2023-09-01 03:37:03,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 268.42857142857144) internal successors, (1879), 7 states have internal predecessors, (1879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:37:03,255 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:37:03,255 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1] [2023-09-01 03:37:03,263 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2023-09-01 03:37:03,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:37:03,458 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2023-09-01 03:37:03,459 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:37:03,459 INFO L85 PathProgramCache]: Analyzing trace with hash 979440244, now seen corresponding path program 3 times [2023-09-01 03:37:03,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:37:03,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [738961201] [2023-09-01 03:37:03,459 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 03:37:03,459 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:37:03,459 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:37:03,461 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:37:03,463 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2023-09-01 03:37:03,641 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-09-01 03:37:03,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 03:37:03,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 21 conjunts are in the unsatisfiable core [2023-09-01 03:37:03,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:37:03,733 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-09-01 03:37:03,733 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-09-01 03:37:04,060 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:37:04,060 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:37:06,092 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:37:06,092 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:37:06,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [738961201] [2023-09-01 03:37:06,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [738961201] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:37:06,093 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:37:06,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2023-09-01 03:37:06,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114586134] [2023-09-01 03:37:06,093 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:37:06,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-09-01 03:37:06,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:37:06,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-09-01 03:37:06,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2023-09-01 03:37:37,046 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 255 out of 650 [2023-09-01 03:37:37,049 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 141 transitions, 1026 flow. Second operand has 24 states, 24 states have (on average 256.0) internal successors, (6144), 24 states have internal predecessors, (6144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:37:37,049 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:37:37,049 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 255 of 650 [2023-09-01 03:37:37,049 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:37:46,097 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:37:48,098 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:37:50,101 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:37:52,104 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:37:54,106 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:37:56,108 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:37:58,111 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:38:00,113 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:38:02,116 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:38:04,118 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:38:07,180 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:38:09,182 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:38:11,184 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:38:13,187 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:38:14,541 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:38:15,980 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.44s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:38:17,981 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:38:19,984 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:38:21,986 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:38:23,989 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:38:27,278 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.38s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:38:30,450 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:38:32,452 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:38:34,454 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:38:36,456 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:38:38,459 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:38:39,864 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.40s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:38:41,865 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:38:43,713 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.85s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:38:45,715 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:38:47,492 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.78s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:38:51,254 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.78s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:38:52,926 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.61s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:38:55,183 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:38:56,408 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:38:59,518 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:39:21,308 INFO L130 PetriNetUnfolder]: 137825/178458 cut-off events. [2023-09-01 03:39:21,309 INFO L131 PetriNetUnfolder]: For 13449/13551 co-relation queries the response was YES. [2023-09-01 03:39:21,846 INFO L83 FinitePrefix]: Finished finitePrefix Result has 428308 conditions, 178458 events. 137825/178458 cut-off events. For 13449/13551 co-relation queries the response was YES. Maximal size of possible extension queue 5026. Compared 1149558 event pairs, 78877 based on Foata normal form. 128/80679 useless extension candidates. Maximal degree in co-relation 428273. Up to 37046 conditions per place. [2023-09-01 03:39:22,452 INFO L137 encePairwiseOnDemand]: 637/650 looper letters, 739 selfloop transitions, 120 changer transitions 2/869 dead transitions. [2023-09-01 03:39:22,453 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 869 transitions, 5160 flow [2023-09-01 03:39:22,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-09-01 03:39:22,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-09-01 03:39:22,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 7769 transitions. [2023-09-01 03:39:22,466 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4426780626780627 [2023-09-01 03:39:22,466 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 7769 transitions. [2023-09-01 03:39:22,466 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 7769 transitions. [2023-09-01 03:39:22,468 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:39:22,468 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 7769 transitions. [2023-09-01 03:39:22,476 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 287.74074074074076) internal successors, (7769), 27 states have internal predecessors, (7769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:39:22,492 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 650.0) internal successors, (18200), 28 states have internal predecessors, (18200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:39:22,494 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 650.0) internal successors, (18200), 28 states have internal predecessors, (18200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:39:22,494 INFO L175 Difference]: Start difference. First operand has 104 places, 141 transitions, 1026 flow. Second operand 27 states and 7769 transitions. [2023-09-01 03:39:22,494 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 869 transitions, 5160 flow [2023-09-01 03:39:22,649 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 869 transitions, 5042 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-09-01 03:39:22,654 INFO L231 Difference]: Finished difference. Result has 144 places, 190 transitions, 1718 flow [2023-09-01 03:39:22,655 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=650, PETRI_DIFFERENCE_MINUEND_FLOW=948, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=1718, PETRI_PLACES=144, PETRI_TRANSITIONS=190} [2023-09-01 03:39:22,655 INFO L281 CegarLoopForPetriNet]: 82 programPoint places, 62 predicate places. [2023-09-01 03:39:22,655 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 190 transitions, 1718 flow [2023-09-01 03:39:22,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 256.0) internal successors, (6144), 24 states have internal predecessors, (6144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:39:22,657 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:39:22,657 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:39:22,669 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2023-09-01 03:39:22,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:39:22,867 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2023-09-01 03:39:22,868 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:39:22,868 INFO L85 PathProgramCache]: Analyzing trace with hash -1685242000, now seen corresponding path program 1 times [2023-09-01 03:39:22,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:39:22,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1568011652] [2023-09-01 03:39:22,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:39:22,868 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:39:22,868 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:39:22,869 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:39:22,871 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2023-09-01 03:39:23,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:39:23,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 10 conjunts are in the unsatisfiable core [2023-09-01 03:39:23,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:39:23,116 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-09-01 03:39:23,116 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2023-09-01 03:39:23,139 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-09-01 03:39:23,139 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 [2023-09-01 03:39:23,159 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-09-01 03:39:23,159 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 [2023-09-01 03:39:23,171 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-09-01 03:39:23,172 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-09-01 03:39:23,186 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-09-01 03:39:23,186 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:39:23,186 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:39:23,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1568011652] [2023-09-01 03:39:23,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1568011652] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:39:23,186 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:39:23,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 03:39:23,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338165543] [2023-09-01 03:39:23,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:39:23,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 03:39:23,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:39:23,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 03:39:23,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 03:39:23,477 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 263 out of 650 [2023-09-01 03:39:23,478 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 190 transitions, 1718 flow. Second operand has 4 states, 4 states have (on average 265.75) internal successors, (1063), 4 states have internal predecessors, (1063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:39:23,478 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:39:23,478 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 263 of 650 [2023-09-01 03:39:23,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:39:37,510 INFO L130 PetriNetUnfolder]: 100422/130536 cut-off events. [2023-09-01 03:39:37,511 INFO L131 PetriNetUnfolder]: For 8491/8583 co-relation queries the response was YES. [2023-09-01 03:39:38,153 INFO L83 FinitePrefix]: Finished finitePrefix Result has 309453 conditions, 130536 events. 100422/130536 cut-off events. For 8491/8583 co-relation queries the response was YES. Maximal size of possible extension queue 3583. Compared 824940 event pairs, 58105 based on Foata normal form. 92/64017 useless extension candidates. Maximal degree in co-relation 309402. Up to 129124 conditions per place. [2023-09-01 03:39:38,584 INFO L137 encePairwiseOnDemand]: 645/650 looper letters, 155 selfloop transitions, 24 changer transitions 0/187 dead transitions. [2023-09-01 03:39:38,584 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 187 transitions, 2066 flow [2023-09-01 03:39:38,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 03:39:38,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 03:39:38,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1108 transitions. [2023-09-01 03:39:38,587 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42615384615384616 [2023-09-01 03:39:38,587 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1108 transitions. [2023-09-01 03:39:38,587 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1108 transitions. [2023-09-01 03:39:38,588 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:39:38,588 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1108 transitions. [2023-09-01 03:39:38,589 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 277.0) internal successors, (1108), 4 states have internal predecessors, (1108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:39:38,591 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 650.0) internal successors, (3250), 5 states have internal predecessors, (3250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:39:38,591 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 650.0) internal successors, (3250), 5 states have internal predecessors, (3250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:39:38,591 INFO L175 Difference]: Start difference. First operand has 144 places, 190 transitions, 1718 flow. Second operand 4 states and 1108 transitions. [2023-09-01 03:39:38,591 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 187 transitions, 2066 flow [2023-09-01 03:39:38,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 187 transitions, 1819 flow, removed 45 selfloop flow, removed 10 redundant places. [2023-09-01 03:39:38,651 INFO L231 Difference]: Finished difference. Result has 134 places, 187 transitions, 1509 flow [2023-09-01 03:39:38,651 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=650, PETRI_DIFFERENCE_MINUEND_FLOW=1461, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1509, PETRI_PLACES=134, PETRI_TRANSITIONS=187} [2023-09-01 03:39:38,652 INFO L281 CegarLoopForPetriNet]: 82 programPoint places, 52 predicate places. [2023-09-01 03:39:38,652 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 187 transitions, 1509 flow [2023-09-01 03:39:38,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 265.75) internal successors, (1063), 4 states have internal predecessors, (1063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:39:38,652 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:39:38,652 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:39:38,661 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 (15)] Ended with exit code 0 [2023-09-01 03:39:38,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:39:38,853 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2023-09-01 03:39:38,853 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:39:38,854 INFO L85 PathProgramCache]: Analyzing trace with hash -1685241804, now seen corresponding path program 1 times [2023-09-01 03:39:38,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:39:38,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1268472801] [2023-09-01 03:39:38,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:39:38,854 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:39:38,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:39:38,855 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:39:38,855 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2023-09-01 03:39:39,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:39:39,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 8 conjunts are in the unsatisfiable core [2023-09-01 03:39:39,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:39:39,047 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-09-01 03:39:39,066 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-09-01 03:39:39,066 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 [2023-09-01 03:39:39,081 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-09-01 03:39:39,081 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-09-01 03:39:39,092 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-09-01 03:39:39,093 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:39:39,093 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:39:39,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1268472801] [2023-09-01 03:39:39,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1268472801] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:39:39,093 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:39:39,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 03:39:39,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096007632] [2023-09-01 03:39:39,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:39:39,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 03:39:39,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:39:39,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 03:39:39,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 03:39:39,268 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 263 out of 650 [2023-09-01 03:39:39,269 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 187 transitions, 1509 flow. Second operand has 4 states, 4 states have (on average 265.75) internal successors, (1063), 4 states have internal predecessors, (1063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:39:39,269 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:39:39,269 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 263 of 650 [2023-09-01 03:39:39,269 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand