./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 AFTER --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/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 AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 00:42:03,038 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 00:42:03,040 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 00:42:03,083 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 00:42:03,083 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 00:42:03,086 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 00:42:03,088 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 00:42:03,091 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 00:42:03,093 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 00:42:03,097 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 00:42:03,098 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 00:42:03,100 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 00:42:03,101 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 00:42:03,102 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 00:42:03,104 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 00:42:03,109 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 00:42:03,110 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 00:42:03,111 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 00:42:03,113 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 00:42:03,117 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 00:42:03,118 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 00:42:03,119 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 00:42:03,120 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 00:42:03,121 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 00:42:03,127 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 00:42:03,127 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 00:42:03,128 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 00:42:03,129 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 00:42:03,130 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 00:42:03,131 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 00:42:03,131 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 00:42:03,132 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 00:42:03,134 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 00:42:03,135 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 00:42:03,135 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 00:42:03,136 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 00:42:03,136 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 00:42:03,136 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 00:42:03,137 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 00:42:03,137 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 00:42:03,138 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 00:42:03,139 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-30 00:42:03,171 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 00:42:03,172 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 00:42:03,173 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 00:42:03,173 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 00:42:03,174 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 00:42:03,174 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 00:42:03,174 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 00:42:03,175 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 00:42:03,175 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 00:42:03,175 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 00:42:03,176 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 00:42:03,176 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 00:42:03,176 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 00:42:03,176 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 00:42:03,176 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 00:42:03,177 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 00:42:03,177 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 00:42:03,177 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 00:42:03,177 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 00:42:03,177 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 00:42:03,177 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 00:42:03,178 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 00:42:03,178 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 00:42:03,178 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 00:42:03,178 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 00:42:03,178 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 00:42:03,179 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 00:42:03,179 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 00:42:03,179 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 00:42:03,179 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 00:42:03,179 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 00:42:03,180 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 00:42:03,180 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 00:42:03,180 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 00:42:03,180 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f91e7b856fd6bf43c568f48d1703ed519fbb708e5c1360b96f8534e6fa4ed35d Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 00:42:03,498 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 00:42:03,520 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 00:42:03,523 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 00:42:03,524 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 00:42:03,524 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 00:42:03,525 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-vector-add.wvr.c [2023-08-30 00:42:04,725 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 00:42:04,941 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 00:42:04,942 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-vector-add.wvr.c [2023-08-30 00:42:04,948 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a5ec4713b/4748653a0de14d3a8b24ebdd51cee28a/FLAG21b63902f [2023-08-30 00:42:04,962 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a5ec4713b/4748653a0de14d3a8b24ebdd51cee28a [2023-08-30 00:42:04,964 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 00:42:04,965 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 00:42:04,966 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 00:42:04,966 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 00:42:04,969 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 00:42:04,970 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 12:42:04" (1/1) ... [2023-08-30 00:42:04,971 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@32b30157 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:42:04, skipping insertion in model container [2023-08-30 00:42:04,971 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 12:42:04" (1/1) ... [2023-08-30 00:42:04,976 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 00:42:04,993 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 00:42:05,159 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] [2023-08-30 00:42:05,176 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 00:42:05,188 ERROR L324 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2023-08-30 00:42:05,190 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@f22f53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:42:05, skipping insertion in model container [2023-08-30 00:42:05,190 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 00:42:05,191 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-08-30 00:42:05,192 INFO L158 Benchmark]: Toolchain (without parser) took 226.14ms. Allocated memory is still 79.7MB. Free memory was 56.9MB in the beginning and 47.2MB in the end (delta: 9.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-08-30 00:42:05,193 INFO L158 Benchmark]: CDTParser took 0.19ms. Allocated memory is still 60.8MB. Free memory was 39.1MB in the beginning and 39.0MB in the end (delta: 53.1kB). There was no memory consumed. Max. memory is 16.1GB. [2023-08-30 00:42:05,194 INFO L158 Benchmark]: CACSL2BoogieTranslator took 224.43ms. Allocated memory is still 79.7MB. Free memory was 56.7MB in the beginning and 47.2MB in the end (delta: 9.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-08-30 00:42:05,195 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19ms. Allocated memory is still 60.8MB. Free memory was 39.1MB in the beginning and 39.0MB in the end (delta: 53.1kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 224.43ms. Allocated memory is still 79.7MB. Free memory was 56.7MB in the beginning and 47.2MB in the end (delta: 9.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 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 AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 00:42:06,785 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 00:42:06,787 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 00:42:06,830 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 00:42:06,838 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 00:42:06,839 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 00:42:06,841 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 00:42:06,842 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 00:42:06,844 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 00:42:06,848 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 00:42:06,849 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 00:42:06,852 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 00:42:06,852 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 00:42:06,854 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 00:42:06,855 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 00:42:06,858 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 00:42:06,861 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 00:42:06,861 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 00:42:06,863 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 00:42:06,865 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 00:42:06,866 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 00:42:06,867 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 00:42:06,868 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 00:42:06,868 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 00:42:06,871 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 00:42:06,871 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 00:42:06,872 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 00:42:06,872 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 00:42:06,873 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 00:42:06,873 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 00:42:06,874 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 00:42:06,874 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 00:42:06,875 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 00:42:06,875 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 00:42:06,876 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 00:42:06,876 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 00:42:06,877 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 00:42:06,877 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 00:42:06,878 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 00:42:06,878 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 00:42:06,879 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 00:42:06,885 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-08-30 00:42:06,916 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 00:42:06,917 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 00:42:06,918 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 00:42:06,918 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 00:42:06,919 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 00:42:06,919 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 00:42:06,919 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 00:42:06,920 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 00:42:06,920 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 00:42:06,920 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 00:42:06,921 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 00:42:06,921 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 00:42:06,921 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 00:42:06,921 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 00:42:06,921 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 00:42:06,921 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 00:42:06,922 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 00:42:06,922 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 00:42:06,922 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 00:42:06,922 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 00:42:06,922 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-08-30 00:42:06,922 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-08-30 00:42:06,923 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 00:42:06,923 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 00:42:06,923 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 00:42:06,923 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 00:42:06,923 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 00:42:06,924 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 00:42:06,924 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 00:42:06,924 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 00:42:06,924 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-08-30 00:42:06,924 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-08-30 00:42:06,925 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 00:42:06,925 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 00:42:06,925 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 00:42:06,925 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-08-30 00:42:06,925 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 00:42:06,925 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f91e7b856fd6bf43c568f48d1703ed519fbb708e5c1360b96f8534e6fa4ed35d Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 00:42:07,211 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 00:42:07,232 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 00:42:07,235 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 00:42:07,235 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 00:42:07,236 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 00:42:07,237 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-vector-add.wvr.c [2023-08-30 00:42:08,400 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 00:42:08,623 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 00:42:08,623 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-vector-add.wvr.c [2023-08-30 00:42:08,628 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f800b79a8/507053e785ea4c3b87b855ddc82761da/FLAG32bcab922 [2023-08-30 00:42:08,639 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f800b79a8/507053e785ea4c3b87b855ddc82761da [2023-08-30 00:42:08,640 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 00:42:08,641 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 00:42:08,642 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 00:42:08,642 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 00:42:08,645 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 00:42:08,645 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 12:42:08" (1/1) ... [2023-08-30 00:42:08,647 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@347ff4f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:42:08, skipping insertion in model container [2023-08-30 00:42:08,647 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 12:42:08" (1/1) ... [2023-08-30 00:42:08,652 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 00:42:08,669 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 00:42:08,823 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] [2023-08-30 00:42:08,838 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 00:42:08,854 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-08-30 00:42:08,865 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 00:42:08,886 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] [2023-08-30 00:42:08,897 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 00:42:08,905 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 00:42:08,939 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] [2023-08-30 00:42:08,945 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 00:42:08,961 INFO L208 MainTranslator]: Completed translation [2023-08-30 00:42:08,963 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:42:08 WrapperNode [2023-08-30 00:42:08,963 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 00:42:08,964 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 00:42:08,965 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 00:42:08,965 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 00:42:08,970 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:42:08" (1/1) ... [2023-08-30 00:42:08,991 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:42:08" (1/1) ... [2023-08-30 00:42:09,021 INFO L138 Inliner]: procedures = 27, calls = 46, calls flagged for inlining = 11, calls inlined = 17, statements flattened = 197 [2023-08-30 00:42:09,022 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 00:42:09,023 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 00:42:09,023 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 00:42:09,023 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 00:42:09,035 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:42:08" (1/1) ... [2023-08-30 00:42:09,036 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:42:08" (1/1) ... [2023-08-30 00:42:09,047 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:42:08" (1/1) ... [2023-08-30 00:42:09,047 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:42:08" (1/1) ... [2023-08-30 00:42:09,059 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:42:08" (1/1) ... [2023-08-30 00:42:09,072 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:42:08" (1/1) ... [2023-08-30 00:42:09,076 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:42:08" (1/1) ... [2023-08-30 00:42:09,080 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:42:08" (1/1) ... [2023-08-30 00:42:09,083 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 00:42:09,085 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 00:42:09,086 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 00:42:09,086 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 00:42:09,087 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:42:08" (1/1) ... [2023-08-30 00:42:09,091 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 00:42:09,101 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:42:09,118 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-30 00:42:09,139 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-30 00:42:09,152 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 00:42:09,153 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-08-30 00:42:09,153 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 00:42:09,153 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-08-30 00:42:09,153 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 00:42:09,153 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 00:42:09,153 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 00:42:09,153 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 00:42:09,154 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-30 00:42:09,154 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-30 00:42:09,154 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-30 00:42:09,154 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 00:42:09,154 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 00:42:09,154 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 00:42:09,155 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-08-30 00:42:09,156 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-30 00:42:09,299 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 00:42:09,301 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 00:42:10,031 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 00:42:10,040 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 00:42:10,045 INFO L302 CfgBuilder]: Removed 7 assume(true) statements. [2023-08-30 00:42:10,051 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 12:42:10 BoogieIcfgContainer [2023-08-30 00:42:10,051 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 00:42:10,053 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 00:42:10,053 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 00:42:10,055 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 00:42:10,055 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 12:42:08" (1/3) ... [2023-08-30 00:42:10,056 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@761c3268 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 12:42:10, skipping insertion in model container [2023-08-30 00:42:10,056 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:42:08" (2/3) ... [2023-08-30 00:42:10,057 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@761c3268 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 12:42:10, skipping insertion in model container [2023-08-30 00:42:10,057 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 12:42:10" (3/3) ... [2023-08-30 00:42:10,058 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-vector-add.wvr.c [2023-08-30 00:42:10,072 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 00:42:10,072 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 44 error locations. [2023-08-30 00:42:10,072 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 00:42:10,181 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-30 00:42:10,214 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 300 places, 315 transitions, 654 flow [2023-08-30 00:42:10,337 INFO L130 PetriNetUnfolder]: 25/312 cut-off events. [2023-08-30 00:42:10,337 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 00:42:10,347 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. [2023-08-30 00:42:10,347 INFO L82 GeneralOperation]: Start removeDead. Operand has 300 places, 315 transitions, 654 flow [2023-08-30 00:42:10,357 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 293 places, 308 transitions, 634 flow [2023-08-30 00:42:10,361 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 00:42:10,379 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 293 places, 308 transitions, 634 flow [2023-08-30 00:42:10,381 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 293 places, 308 transitions, 634 flow [2023-08-30 00:42:10,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 293 places, 308 transitions, 634 flow [2023-08-30 00:42:10,433 INFO L130 PetriNetUnfolder]: 25/308 cut-off events. [2023-08-30 00:42:10,434 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 00:42:10,436 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. [2023-08-30 00:42:10,439 INFO L119 LiptonReduction]: Number of co-enabled transitions 4560 [2023-08-30 00:42:37,441 INFO L134 LiptonReduction]: Checked pairs total: 12952 [2023-08-30 00:42:37,441 INFO L136 LiptonReduction]: Total number of compositions: 335 [2023-08-30 00:42:37,456 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 00:42:37,461 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;@1bcf5b8, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 00:42:37,462 INFO L358 AbstractCegarLoop]: Starting to check reachability of 65 error locations. [2023-08-30 00:42:37,464 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-08-30 00:42:37,464 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 00:42:37,465 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:42:37,469 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 00:42:37,471 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2023-08-30 00:42:37,478 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:42:37,478 INFO L85 PathProgramCache]: Analyzing trace with hash 37267, now seen corresponding path program 1 times [2023-08-30 00:42:37,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:42:37,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1981235048] [2023-08-30 00:42:37,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:42:37,493 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:42:37,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:42:37,496 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:42:37,523 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-08-30 00:42:37,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:42:37,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 00:42:37,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:42:37,754 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-08-30 00:42:37,755 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 [2023-08-30 00:42:37,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:42:37,792 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:42:37,793 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:42:37,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1981235048] [2023-08-30 00:42:37,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1981235048] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:42:37,794 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:42:37,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 00:42:37,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111330284] [2023-08-30 00:42:37,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:42:37,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 00:42:37,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:42:37,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 00:42:37,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 00:42:38,091 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 271 out of 650 [2023-08-30 00:42:38,094 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) [2023-08-30 00:42:38,095 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:42:38,095 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 271 of 650 [2023-08-30 00:42:38,096 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:42:40,724 INFO L130 PetriNetUnfolder]: 18697/23672 cut-off events. [2023-08-30 00:42:40,724 INFO L131 PetriNetUnfolder]: For 253/253 co-relation queries the response was YES. [2023-08-30 00:42:40,756 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. [2023-08-30 00:42:40,905 INFO L137 encePairwiseOnDemand]: 644/650 looper letters, 67 selfloop transitions, 1 changer transitions 0/74 dead transitions. [2023-08-30 00:42:40,905 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 74 transitions, 302 flow [2023-08-30 00:42:40,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:42:40,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:42:40,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 886 transitions. [2023-08-30 00:42:40,926 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4543589743589744 [2023-08-30 00:42:40,928 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 886 transitions. [2023-08-30 00:42:40,928 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 886 transitions. [2023-08-30 00:42:40,931 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:42:40,933 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 886 transitions. [2023-08-30 00:42:40,939 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) [2023-08-30 00:42:40,948 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) [2023-08-30 00:42:40,951 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) [2023-08-30 00:42:40,953 INFO L175 Difference]: Start difference. First operand has 82 places, 79 transitions, 176 flow. Second operand 3 states and 886 transitions. [2023-08-30 00:42:40,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 74 transitions, 302 flow [2023-08-30 00:42:40,967 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 74 transitions, 290 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-30 00:42:40,969 INFO L231 Difference]: Finished difference. Result has 73 places, 74 transitions, 156 flow [2023-08-30 00:42:40,971 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} [2023-08-30 00:42:40,976 INFO L281 CegarLoopForPetriNet]: 82 programPoint places, -9 predicate places. [2023-08-30 00:42:40,977 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 74 transitions, 156 flow [2023-08-30 00:42:40,978 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) [2023-08-30 00:42:40,978 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:42:40,982 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 00:42:40,993 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2023-08-30 00:42:41,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:42:41,192 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2023-08-30 00:42:41,193 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:42:41,193 INFO L85 PathProgramCache]: Analyzing trace with hash 37268, now seen corresponding path program 1 times [2023-08-30 00:42:41,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:42:41,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [286972464] [2023-08-30 00:42:41,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:42:41,194 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:42:41,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:42:41,195 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:42:41,202 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-08-30 00:42:41,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:42:41,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 00:42:41,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:42:41,367 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 00:42:41,368 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 [2023-08-30 00:42:41,403 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:42:41,404 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:42:41,404 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:42:41,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [286972464] [2023-08-30 00:42:41,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [286972464] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:42:41,404 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:42:41,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 00:42:41,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150600740] [2023-08-30 00:42:41,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:42:41,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 00:42:41,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:42:41,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 00:42:41,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 00:42:41,831 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 271 out of 650 [2023-08-30 00:42:41,833 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) [2023-08-30 00:42:41,833 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:42:41,833 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 271 of 650 [2023-08-30 00:42:41,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:42:45,363 INFO L130 PetriNetUnfolder]: 37393/47339 cut-off events. [2023-08-30 00:42:45,363 INFO L131 PetriNetUnfolder]: For 88/88 co-relation queries the response was YES. [2023-08-30 00:42:45,400 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. [2023-08-30 00:42:45,604 INFO L137 encePairwiseOnDemand]: 638/650 looper letters, 123 selfloop transitions, 8 changer transitions 0/137 dead transitions. [2023-08-30 00:42:45,605 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 137 transitions, 550 flow [2023-08-30 00:42:45,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:42:45,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:42:45,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 948 transitions. [2023-08-30 00:42:45,609 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48615384615384616 [2023-08-30 00:42:45,609 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 948 transitions. [2023-08-30 00:42:45,609 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 948 transitions. [2023-08-30 00:42:45,609 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:42:45,609 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 948 transitions. [2023-08-30 00:42:45,611 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) [2023-08-30 00:42:45,615 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) [2023-08-30 00:42:45,617 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) [2023-08-30 00:42:45,617 INFO L175 Difference]: Start difference. First operand has 73 places, 74 transitions, 156 flow. Second operand 3 states and 948 transitions. [2023-08-30 00:42:45,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 137 transitions, 550 flow [2023-08-30 00:42:45,619 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 137 transitions, 549 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 00:42:45,621 INFO L231 Difference]: Finished difference. Result has 76 places, 81 transitions, 223 flow [2023-08-30 00:42:45,622 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} [2023-08-30 00:42:45,622 INFO L281 CegarLoopForPetriNet]: 82 programPoint places, -6 predicate places. [2023-08-30 00:42:45,623 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 81 transitions, 223 flow [2023-08-30 00:42:45,623 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) [2023-08-30 00:42:45,624 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:42:45,624 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 00:42:45,640 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2023-08-30 00:42:45,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:42:45,833 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2023-08-30 00:42:45,835 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:42:45,836 INFO L85 PathProgramCache]: Analyzing trace with hash 1160367, now seen corresponding path program 1 times [2023-08-30 00:42:45,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:42:45,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1522515748] [2023-08-30 00:42:45,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:42:45,836 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:42:45,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:42:45,841 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:42:45,842 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-08-30 00:42:45,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:42:45,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-30 00:42:45,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:42:46,011 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 00:42:46,011 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 [2023-08-30 00:42:46,071 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:42:46,071 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:42:46,236 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:42:46,237 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:42:46,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1522515748] [2023-08-30 00:42:46,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1522515748] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:42:46,237 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:42:46,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-08-30 00:42:46,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352572862] [2023-08-30 00:42:46,238 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:42:46,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 00:42:46,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:42:46,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 00:42:46,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-30 00:42:47,750 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 251 out of 650 [2023-08-30 00:42:47,752 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) [2023-08-30 00:42:47,752 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:42:47,752 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 251 of 650 [2023-08-30 00:42:47,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:42:54,480 INFO L130 PetriNetUnfolder]: 56101/71026 cut-off events. [2023-08-30 00:42:54,481 INFO L131 PetriNetUnfolder]: For 125/125 co-relation queries the response was YES. [2023-08-30 00:42:54,556 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. [2023-08-30 00:42:54,872 INFO L137 encePairwiseOnDemand]: 635/650 looper letters, 179 selfloop transitions, 35 changer transitions 0/220 dead transitions. [2023-08-30 00:42:54,872 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 220 transitions, 1001 flow [2023-08-30 00:42:54,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 00:42:54,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 00:42:54,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1732 transitions. [2023-08-30 00:42:54,879 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4441025641025641 [2023-08-30 00:42:54,879 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1732 transitions. [2023-08-30 00:42:54,879 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1732 transitions. [2023-08-30 00:42:54,880 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:42:54,880 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1732 transitions. [2023-08-30 00:42:54,884 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) [2023-08-30 00:42:54,890 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) [2023-08-30 00:42:54,892 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) [2023-08-30 00:42:54,892 INFO L175 Difference]: Start difference. First operand has 76 places, 81 transitions, 223 flow. Second operand 6 states and 1732 transitions. [2023-08-30 00:42:54,892 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 220 transitions, 1001 flow [2023-08-30 00:42:54,895 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 220 transitions, 967 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 00:42:54,897 INFO L231 Difference]: Finished difference. Result has 83 places, 108 transitions, 470 flow [2023-08-30 00:42:54,897 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} [2023-08-30 00:42:54,898 INFO L281 CegarLoopForPetriNet]: 82 programPoint places, 1 predicate places. [2023-08-30 00:42:54,898 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 108 transitions, 470 flow [2023-08-30 00:42:54,899 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) [2023-08-30 00:42:54,899 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:42:54,900 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 00:42:54,911 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2023-08-30 00:42:55,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:42:55,108 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2023-08-30 00:42:55,109 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:42:55,109 INFO L85 PathProgramCache]: Analyzing trace with hash 1116469546, now seen corresponding path program 1 times [2023-08-30 00:42:55,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:42:55,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [884969536] [2023-08-30 00:42:55,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:42:55,110 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:42:55,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:42:55,111 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:42:55,112 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-08-30 00:42:55,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:42:55,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-30 00:42:55,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:42:55,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:42:55,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:42:55,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:42:55,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:42:55,344 INFO L321 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2023-08-30 00:42:55,344 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 [2023-08-30 00:42:55,373 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-08-30 00:42:55,373 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 [2023-08-30 00:42:55,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:42:55,429 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-30 00:42:55,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:42:55,461 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-30 00:42:55,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:42:55,493 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-30 00:42:55,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:42:55,521 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:42:55,521 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:42:55,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [884969536] [2023-08-30 00:42:55,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [884969536] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:42:55,522 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:42:55,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 00:42:55,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022253276] [2023-08-30 00:42:55,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:42:55,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 00:42:55,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:42:55,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 00:42:55,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 00:42:55,937 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 281 out of 650 [2023-08-30 00:42:55,938 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) [2023-08-30 00:42:55,938 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:42:55,938 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 281 of 650 [2023-08-30 00:42:55,938 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:42:59,777 INFO L130 PetriNetUnfolder]: 42809/54731 cut-off events. [2023-08-30 00:42:59,777 INFO L131 PetriNetUnfolder]: For 163/163 co-relation queries the response was YES. [2023-08-30 00:42:59,847 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. [2023-08-30 00:43:00,069 INFO L137 encePairwiseOnDemand]: 647/650 looper letters, 97 selfloop transitions, 1 changer transitions 0/104 dead transitions. [2023-08-30 00:43:00,069 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 104 transitions, 646 flow [2023-08-30 00:43:00,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:43:00,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:43:00,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 911 transitions. [2023-08-30 00:43:00,074 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46717948717948715 [2023-08-30 00:43:00,074 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 911 transitions. [2023-08-30 00:43:00,074 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 911 transitions. [2023-08-30 00:43:00,075 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:43:00,075 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 911 transitions. [2023-08-30 00:43:00,077 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) [2023-08-30 00:43:00,080 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) [2023-08-30 00:43:00,082 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) [2023-08-30 00:43:00,082 INFO L175 Difference]: Start difference. First operand has 83 places, 108 transitions, 470 flow. Second operand 3 states and 911 transitions. [2023-08-30 00:43:00,082 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 104 transitions, 646 flow [2023-08-30 00:43:00,087 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 104 transitions, 605 flow, removed 12 selfloop flow, removed 1 redundant places. [2023-08-30 00:43:00,090 INFO L231 Difference]: Finished difference. Result has 82 places, 104 transitions, 411 flow [2023-08-30 00:43:00,091 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} [2023-08-30 00:43:00,092 INFO L281 CegarLoopForPetriNet]: 82 programPoint places, 0 predicate places. [2023-08-30 00:43:00,092 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 104 transitions, 411 flow [2023-08-30 00:43:00,093 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) [2023-08-30 00:43:00,093 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:43:00,093 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 00:43:00,106 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2023-08-30 00:43:00,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:43:00,303 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2023-08-30 00:43:00,304 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:43:00,304 INFO L85 PathProgramCache]: Analyzing trace with hash 1116469544, now seen corresponding path program 1 times [2023-08-30 00:43:00,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:43:00,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1764354130] [2023-08-30 00:43:00,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:43:00,305 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:43:00,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:43:00,306 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:43:00,306 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2023-08-30 00:43:00,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:43:00,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-30 00:43:00,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:43:00,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:43:00,499 INFO L321 Elim1Store]: treesize reduction 86, result has 25.9 percent of original size [2023-08-30 00:43:00,499 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 [2023-08-30 00:43:00,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:43:00,575 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2023-08-30 00:43:00,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:43:00,595 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2023-08-30 00:43:00,785 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-08-30 00:43:00,785 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-08-30 00:43:00,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:43:00,795 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:43:00,795 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:43:00,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1764354130] [2023-08-30 00:43:00,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1764354130] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:43:00,795 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:43:00,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 00:43:00,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76985730] [2023-08-30 00:43:00,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:43:00,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 00:43:00,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:43:00,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 00:43:00,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 00:43:01,115 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 282 out of 650 [2023-08-30 00:43:01,116 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) [2023-08-30 00:43:01,116 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:43:01,116 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 282 of 650 [2023-08-30 00:43:01,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:43:03,777 INFO L130 PetriNetUnfolder]: 29517/38436 cut-off events. [2023-08-30 00:43:03,777 INFO L131 PetriNetUnfolder]: For 168/168 co-relation queries the response was YES. [2023-08-30 00:43:03,864 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. [2023-08-30 00:43:04,014 INFO L137 encePairwiseOnDemand]: 647/650 looper letters, 93 selfloop transitions, 1 changer transitions 0/100 dead transitions. [2023-08-30 00:43:04,014 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 100 transitions, 579 flow [2023-08-30 00:43:04,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:43:04,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:43:04,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 912 transitions. [2023-08-30 00:43:04,021 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4676923076923077 [2023-08-30 00:43:04,022 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 912 transitions. [2023-08-30 00:43:04,022 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 912 transitions. [2023-08-30 00:43:04,022 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:43:04,022 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 912 transitions. [2023-08-30 00:43:04,024 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) [2023-08-30 00:43:04,027 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) [2023-08-30 00:43:04,028 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) [2023-08-30 00:43:04,029 INFO L175 Difference]: Start difference. First operand has 82 places, 104 transitions, 411 flow. Second operand 3 states and 912 transitions. [2023-08-30 00:43:04,029 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 100 transitions, 579 flow [2023-08-30 00:43:04,031 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 100 transitions, 578 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 00:43:04,035 INFO L231 Difference]: Finished difference. Result has 81 places, 100 transitions, 392 flow [2023-08-30 00:43:04,035 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} [2023-08-30 00:43:04,038 INFO L281 CegarLoopForPetriNet]: 82 programPoint places, -1 predicate places. [2023-08-30 00:43:04,038 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 100 transitions, 392 flow [2023-08-30 00:43:04,040 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) [2023-08-30 00:43:04,040 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:43:04,040 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-08-30 00:43:04,051 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2023-08-30 00:43:04,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:43:04,250 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2023-08-30 00:43:04,250 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:43:04,250 INFO L85 PathProgramCache]: Analyzing trace with hash 213778516, now seen corresponding path program 2 times [2023-08-30 00:43:04,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:43:04,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1785985993] [2023-08-30 00:43:04,250 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 00:43:04,251 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:43:04,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:43:04,252 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:43:04,253 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2023-08-30 00:43:04,334 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 00:43:04,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:43:04,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-30 00:43:04,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:43:04,448 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 00:43:04,448 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 [2023-08-30 00:43:04,577 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:43:04,577 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:43:04,978 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:43:04,978 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:43:04,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1785985993] [2023-08-30 00:43:04,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1785985993] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:43:04,979 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:43:04,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-30 00:43:04,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423703442] [2023-08-30 00:43:04,979 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:43:04,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 00:43:04,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:43:04,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 00:43:04,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-08-30 00:43:12,022 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 255 out of 650 [2023-08-30 00:43:12,024 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) [2023-08-30 00:43:12,024 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:43:12,024 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 255 of 650 [2023-08-30 00:43:12,024 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:43:14,257 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:43:15,434 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:43:17,328 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:43:18,907 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:43:20,160 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:43:21,901 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:43:23,614 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.71s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:43:26,204 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.88s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:43:29,457 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.54s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:43:30,752 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:43:32,793 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:43:35,308 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.61s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:43:38,632 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.69s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:43:40,158 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.53s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:43:43,575 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:43:57,607 INFO L130 PetriNetUnfolder]: 98365/128063 cut-off events. [2023-08-30 00:43:57,608 INFO L131 PetriNetUnfolder]: For 471/471 co-relation queries the response was YES. [2023-08-30 00:43:57,808 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. [2023-08-30 00:43:58,175 INFO L137 encePairwiseOnDemand]: 637/650 looper letters, 531 selfloop transitions, 72 changer transitions 0/609 dead transitions. [2023-08-30 00:43:58,175 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 609 transitions, 2870 flow [2023-08-30 00:43:58,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 00:43:58,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 00:43:58,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 3687 transitions. [2023-08-30 00:43:58,186 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4726923076923077 [2023-08-30 00:43:58,186 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 3687 transitions. [2023-08-30 00:43:58,186 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 3687 transitions. [2023-08-30 00:43:58,188 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:43:58,188 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 3687 transitions. [2023-08-30 00:43:58,195 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) [2023-08-30 00:43:58,204 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) [2023-08-30 00:43:58,206 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) [2023-08-30 00:43:58,206 INFO L175 Difference]: Start difference. First operand has 81 places, 100 transitions, 392 flow. Second operand 12 states and 3687 transitions. [2023-08-30 00:43:58,207 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 609 transitions, 2870 flow [2023-08-30 00:43:58,211 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 609 transitions, 2869 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 00:43:58,215 INFO L231 Difference]: Finished difference. Result has 98 places, 143 transitions, 927 flow [2023-08-30 00:43:58,216 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} [2023-08-30 00:43:58,216 INFO L281 CegarLoopForPetriNet]: 82 programPoint places, 16 predicate places. [2023-08-30 00:43:58,216 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 143 transitions, 927 flow [2023-08-30 00:43:58,218 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) [2023-08-30 00:43:58,218 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:43:58,218 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:43:58,227 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 (7)] Ended with exit code 0 [2023-08-30 00:43:58,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:43:58,427 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2023-08-30 00:43:58,428 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:43:58,428 INFO L85 PathProgramCache]: Analyzing trace with hash -814565407, now seen corresponding path program 1 times [2023-08-30 00:43:58,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:43:58,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1135083382] [2023-08-30 00:43:58,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:43:58,428 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:43:58,428 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:43:58,429 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:43:58,430 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2023-08-30 00:43:58,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:43:58,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-30 00:43:58,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:43:58,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:43:58,622 INFO L321 Elim1Store]: treesize reduction 79, result has 27.5 percent of original size [2023-08-30 00:43:58,622 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 [2023-08-30 00:43:58,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:43:58,670 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2023-08-30 00:43:58,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:43:58,693 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2023-08-30 00:43:58,725 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-08-30 00:43:58,725 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-08-30 00:43:58,758 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:43:58,758 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:43:58,758 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:43:58,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1135083382] [2023-08-30 00:43:58,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1135083382] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:43:58,759 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:43:58,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 00:43:58,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583152556] [2023-08-30 00:43:58,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:43:58,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 00:43:58,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:43:58,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 00:43:58,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 00:43:59,076 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 282 out of 650 [2023-08-30 00:43:59,077 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) [2023-08-30 00:43:59,077 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:43:59,077 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 282 of 650 [2023-08-30 00:43:59,077 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:44:08,286 INFO L130 PetriNetUnfolder]: 95225/123823 cut-off events. [2023-08-30 00:44:08,287 INFO L131 PetriNetUnfolder]: For 642/642 co-relation queries the response was YES. [2023-08-30 00:44:08,637 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. [2023-08-30 00:44:09,060 INFO L137 encePairwiseOnDemand]: 647/650 looper letters, 134 selfloop transitions, 1 changer transitions 0/141 dead transitions. [2023-08-30 00:44:09,061 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 141 transitions, 1193 flow [2023-08-30 00:44:09,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:44:09,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:44:09,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 910 transitions. [2023-08-30 00:44:09,064 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4666666666666667 [2023-08-30 00:44:09,065 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 910 transitions. [2023-08-30 00:44:09,065 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 910 transitions. [2023-08-30 00:44:09,065 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:44:09,065 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 910 transitions. [2023-08-30 00:44:09,067 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) [2023-08-30 00:44:09,070 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) [2023-08-30 00:44:09,070 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) [2023-08-30 00:44:09,070 INFO L175 Difference]: Start difference. First operand has 98 places, 143 transitions, 927 flow. Second operand 3 states and 910 transitions. [2023-08-30 00:44:09,071 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 141 transitions, 1193 flow [2023-08-30 00:44:09,075 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 141 transitions, 1066 flow, removed 28 selfloop flow, removed 4 redundant places. [2023-08-30 00:44:09,077 INFO L231 Difference]: Finished difference. Result has 94 places, 141 transitions, 798 flow [2023-08-30 00:44:09,077 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} [2023-08-30 00:44:09,078 INFO L281 CegarLoopForPetriNet]: 82 programPoint places, 12 predicate places. [2023-08-30 00:44:09,078 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 141 transitions, 798 flow [2023-08-30 00:44:09,078 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) [2023-08-30 00:44:09,078 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:44:09,079 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:44:09,088 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 (8)] Ended with exit code 0 [2023-08-30 00:44:09,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:44:09,288 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2023-08-30 00:44:09,288 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:44:09,288 INFO L85 PathProgramCache]: Analyzing trace with hash -814565408, now seen corresponding path program 1 times [2023-08-30 00:44:09,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:44:09,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1045258511] [2023-08-30 00:44:09,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:44:09,289 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:44:09,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:44:09,291 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:44:09,293 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2023-08-30 00:44:09,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:44:09,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-30 00:44:09,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:44:09,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:44:09,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:44:09,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:44:09,491 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2023-08-30 00:44:09,491 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 [2023-08-30 00:44:09,510 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 [2023-08-30 00:44:09,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:44:09,569 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-30 00:44:09,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:44:09,594 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-30 00:44:09,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:44:09,627 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-30 00:44:09,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:44:09,677 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:44:09,678 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:44:09,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1045258511] [2023-08-30 00:44:09,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1045258511] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:44:09,678 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:44:09,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 00:44:09,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258854187] [2023-08-30 00:44:09,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:44:09,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 00:44:09,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:44:09,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 00:44:09,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 00:44:10,075 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 281 out of 650 [2023-08-30 00:44:10,076 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) [2023-08-30 00:44:10,076 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:44:10,077 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 281 of 650 [2023-08-30 00:44:10,077 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:44:19,240 INFO L130 PetriNetUnfolder]: 92085/119583 cut-off events. [2023-08-30 00:44:19,240 INFO L131 PetriNetUnfolder]: For 667/667 co-relation queries the response was YES. [2023-08-30 00:44:19,597 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. [2023-08-30 00:44:19,950 INFO L137 encePairwiseOnDemand]: 647/650 looper letters, 132 selfloop transitions, 1 changer transitions 0/139 dead transitions. [2023-08-30 00:44:19,950 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 139 transitions, 1060 flow [2023-08-30 00:44:19,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:44:19,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:44:19,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 905 transitions. [2023-08-30 00:44:19,953 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4641025641025641 [2023-08-30 00:44:19,954 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 905 transitions. [2023-08-30 00:44:19,954 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 905 transitions. [2023-08-30 00:44:19,954 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:44:19,954 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 905 transitions. [2023-08-30 00:44:19,956 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) [2023-08-30 00:44:19,958 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) [2023-08-30 00:44:19,959 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) [2023-08-30 00:44:19,959 INFO L175 Difference]: Start difference. First operand has 94 places, 141 transitions, 798 flow. Second operand 3 states and 905 transitions. [2023-08-30 00:44:19,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 139 transitions, 1060 flow [2023-08-30 00:44:19,962 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 139 transitions, 1059 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 00:44:19,964 INFO L231 Difference]: Finished difference. Result has 93 places, 139 transitions, 795 flow [2023-08-30 00:44:19,965 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} [2023-08-30 00:44:19,965 INFO L281 CegarLoopForPetriNet]: 82 programPoint places, 11 predicate places. [2023-08-30 00:44:19,965 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 139 transitions, 795 flow [2023-08-30 00:44:19,966 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) [2023-08-30 00:44:19,966 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:44:19,966 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:44:19,978 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2023-08-30 00:44:20,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:44:20,175 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2023-08-30 00:44:20,176 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:44:20,176 INFO L85 PathProgramCache]: Analyzing trace with hash 518267548, now seen corresponding path program 1 times [2023-08-30 00:44:20,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:44:20,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1792152611] [2023-08-30 00:44:20,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:44:20,176 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:44:20,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:44:20,177 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:44:20,178 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2023-08-30 00:44:20,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:44:20,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 00:44:20,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:44:20,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:44:20,317 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:44:20,317 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:44:20,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1792152611] [2023-08-30 00:44:20,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1792152611] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:44:20,317 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:44:20,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 00:44:20,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381435322] [2023-08-30 00:44:20,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:44:20,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 00:44:20,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:44:20,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 00:44:20,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 00:44:20,534 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 269 out of 650 [2023-08-30 00:44:20,535 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) [2023-08-30 00:44:20,535 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:44:20,535 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 269 of 650 [2023-08-30 00:44:20,535 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:44:28,879 INFO L130 PetriNetUnfolder]: 75036/100838 cut-off events. [2023-08-30 00:44:28,880 INFO L131 PetriNetUnfolder]: For 590/590 co-relation queries the response was YES. [2023-08-30 00:44:29,224 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. [2023-08-30 00:44:29,668 INFO L137 encePairwiseOnDemand]: 630/650 looper letters, 157 selfloop transitions, 40 changer transitions 1/203 dead transitions. [2023-08-30 00:44:29,668 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 203 transitions, 1339 flow [2023-08-30 00:44:29,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 00:44:29,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 00:44:29,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1490 transitions. [2023-08-30 00:44:29,673 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4584615384615385 [2023-08-30 00:44:29,673 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1490 transitions. [2023-08-30 00:44:29,673 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1490 transitions. [2023-08-30 00:44:29,674 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:44:29,674 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1490 transitions. [2023-08-30 00:44:29,677 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) [2023-08-30 00:44:29,680 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) [2023-08-30 00:44:29,681 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) [2023-08-30 00:44:29,681 INFO L175 Difference]: Start difference. First operand has 93 places, 139 transitions, 795 flow. Second operand 5 states and 1490 transitions. [2023-08-30 00:44:29,681 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 203 transitions, 1339 flow [2023-08-30 00:44:29,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 203 transitions, 1338 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 00:44:29,688 INFO L231 Difference]: Finished difference. Result has 99 places, 143 transitions, 963 flow [2023-08-30 00:44:29,688 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} [2023-08-30 00:44:29,689 INFO L281 CegarLoopForPetriNet]: 82 programPoint places, 17 predicate places. [2023-08-30 00:44:29,689 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 143 transitions, 963 flow [2023-08-30 00:44:29,689 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) [2023-08-30 00:44:29,689 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:44:29,690 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:44:29,703 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Ended with exit code 0 [2023-08-30 00:44:29,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:44:29,899 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2023-08-30 00:44:29,899 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:44:29,899 INFO L85 PathProgramCache]: Analyzing trace with hash -1113281493, now seen corresponding path program 1 times [2023-08-30 00:44:29,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:44:29,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [391174222] [2023-08-30 00:44:29,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:44:29,899 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:44:29,900 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:44:29,900 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:44:29,904 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2023-08-30 00:44:30,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:44:30,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-30 00:44:30,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:44:30,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:44:30,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:44:30,061 INFO L321 Elim1Store]: treesize reduction 89, result has 14.4 percent of original size [2023-08-30 00:44:30,061 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 [2023-08-30 00:44:30,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:44:30,167 INFO L321 Elim1Store]: treesize reduction 54, result has 29.9 percent of original size [2023-08-30 00:44:30,168 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 [2023-08-30 00:44:30,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:44:30,431 INFO L321 Elim1Store]: treesize reduction 54, result has 29.9 percent of original size [2023-08-30 00:44:30,432 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 [2023-08-30 00:44:30,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:44:30,646 INFO L321 Elim1Store]: treesize reduction 62, result has 19.5 percent of original size [2023-08-30 00:44:30,646 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 [2023-08-30 00:44:30,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:44:30,905 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:44:30,905 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:44:30,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [391174222] [2023-08-30 00:44:30,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [391174222] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:44:30,906 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:44:30,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 00:44:30,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020890950] [2023-08-30 00:44:30,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:44:30,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 00:44:30,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:44:30,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 00:44:30,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 00:44:32,923 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 276 out of 650 [2023-08-30 00:44:32,924 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) [2023-08-30 00:44:32,924 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:44:32,924 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 276 of 650 [2023-08-30 00:44:32,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:44:42,624 INFO L130 PetriNetUnfolder]: 83707/107997 cut-off events. [2023-08-30 00:44:42,625 INFO L131 PetriNetUnfolder]: For 2842/3064 co-relation queries the response was YES. [2023-08-30 00:44:43,042 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. [2023-08-30 00:44:43,526 INFO L137 encePairwiseOnDemand]: 647/650 looper letters, 133 selfloop transitions, 1 changer transitions 0/141 dead transitions. [2023-08-30 00:44:43,526 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 141 transitions, 1227 flow [2023-08-30 00:44:43,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:44:43,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:44:43,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 888 transitions. [2023-08-30 00:44:43,529 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4553846153846154 [2023-08-30 00:44:43,529 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 888 transitions. [2023-08-30 00:44:43,529 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 888 transitions. [2023-08-30 00:44:43,530 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:44:43,530 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 888 transitions. [2023-08-30 00:44:43,531 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) [2023-08-30 00:44:43,533 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) [2023-08-30 00:44:43,534 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) [2023-08-30 00:44:43,534 INFO L175 Difference]: Start difference. First operand has 99 places, 143 transitions, 963 flow. Second operand 3 states and 888 transitions. [2023-08-30 00:44:43,534 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 141 transitions, 1227 flow [2023-08-30 00:44:43,565 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 141 transitions, 1182 flow, removed 5 selfloop flow, removed 1 redundant places. [2023-08-30 00:44:43,567 INFO L231 Difference]: Finished difference. Result has 98 places, 141 transitions, 916 flow [2023-08-30 00:44:43,568 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} [2023-08-30 00:44:43,568 INFO L281 CegarLoopForPetriNet]: 82 programPoint places, 16 predicate places. [2023-08-30 00:44:43,568 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 141 transitions, 916 flow [2023-08-30 00:44:43,569 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) [2023-08-30 00:44:43,569 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:44:43,569 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:44:43,578 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2023-08-30 00:44:43,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:44:43,778 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2023-08-30 00:44:43,779 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:44:43,779 INFO L85 PathProgramCache]: Analyzing trace with hash -1113281491, now seen corresponding path program 1 times [2023-08-30 00:44:43,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:44:43,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [829006345] [2023-08-30 00:44:43,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:44:43,779 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:44:43,779 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:44:43,780 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:44:43,781 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2023-08-30 00:44:43,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:44:43,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-30 00:44:43,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:44:43,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:44:43,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:44:43,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:44:43,965 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2023-08-30 00:44:43,965 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 [2023-08-30 00:44:43,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:44:43,979 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 [2023-08-30 00:44:44,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:44:44,022 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-30 00:44:44,028 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-08-30 00:44:44,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:44:44,076 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-30 00:44:44,090 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-30 00:44:44,091 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-08-30 00:44:44,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:44:44,143 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-30 00:44:44,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:44:44,290 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:44:44,290 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:44:44,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [829006345] [2023-08-30 00:44:44,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [829006345] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:44:44,290 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:44:44,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 00:44:44,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984382023] [2023-08-30 00:44:44,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:44:44,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 00:44:44,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:44:44,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 00:44:44,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-08-30 00:44:45,439 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 276 out of 650 [2023-08-30 00:44:45,441 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) [2023-08-30 00:44:45,441 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:44:45,441 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 276 of 650 [2023-08-30 00:44:45,442 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:44:53,905 INFO L130 PetriNetUnfolder]: 80882/104152 cut-off events. [2023-08-30 00:44:53,905 INFO L131 PetriNetUnfolder]: For 2812/3024 co-relation queries the response was YES. [2023-08-30 00:44:54,289 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. [2023-08-30 00:44:54,608 INFO L137 encePairwiseOnDemand]: 647/650 looper letters, 131 selfloop transitions, 1 changer transitions 0/139 dead transitions. [2023-08-30 00:44:54,608 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 139 transitions, 1176 flow [2023-08-30 00:44:54,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:44:54,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:44:54,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 886 transitions. [2023-08-30 00:44:54,611 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4543589743589744 [2023-08-30 00:44:54,611 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 886 transitions. [2023-08-30 00:44:54,611 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 886 transitions. [2023-08-30 00:44:54,611 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:44:54,611 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 886 transitions. [2023-08-30 00:44:54,613 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) [2023-08-30 00:44:54,614 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) [2023-08-30 00:44:54,615 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) [2023-08-30 00:44:54,615 INFO L175 Difference]: Start difference. First operand has 98 places, 141 transitions, 916 flow. Second operand 3 states and 886 transitions. [2023-08-30 00:44:54,615 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 139 transitions, 1176 flow [2023-08-30 00:44:54,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 139 transitions, 1175 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 00:44:54,635 INFO L231 Difference]: Finished difference. Result has 97 places, 139 transitions, 913 flow [2023-08-30 00:44:54,635 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} [2023-08-30 00:44:54,636 INFO L281 CegarLoopForPetriNet]: 82 programPoint places, 15 predicate places. [2023-08-30 00:44:54,636 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 139 transitions, 913 flow [2023-08-30 00:44:54,637 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) [2023-08-30 00:44:54,637 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:44:54,637 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:44:54,645 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Ended with exit code 0 [2023-08-30 00:44:54,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:44:54,842 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2023-08-30 00:44:54,842 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:44:54,842 INFO L85 PathProgramCache]: Analyzing trace with hash -151996514, now seen corresponding path program 1 times [2023-08-30 00:44:54,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:44:54,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1372615514] [2023-08-30 00:44:54,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:44:54,843 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:44:54,843 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:44:54,844 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:44:54,844 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2023-08-30 00:44:54,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:44:54,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-30 00:44:54,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:44:55,031 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:44:55,032 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:44:55,032 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:44:55,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1372615514] [2023-08-30 00:44:55,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1372615514] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:44:55,032 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:44:55,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 00:44:55,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730903323] [2023-08-30 00:44:55,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:44:55,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 00:44:55,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:44:55,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 00:44:55,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-08-30 00:44:55,343 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 267 out of 650 [2023-08-30 00:44:55,344 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) [2023-08-30 00:44:55,344 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:44:55,344 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 267 of 650 [2023-08-30 00:44:55,344 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:45:03,277 INFO L130 PetriNetUnfolder]: 71251/94446 cut-off events. [2023-08-30 00:45:03,277 INFO L131 PetriNetUnfolder]: For 3918/3983 co-relation queries the response was YES. [2023-08-30 00:45:03,644 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. [2023-08-30 00:45:03,923 INFO L137 encePairwiseOnDemand]: 635/650 looper letters, 128 selfloop transitions, 41 changer transitions 3/178 dead transitions. [2023-08-30 00:45:03,924 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 178 transitions, 1349 flow [2023-08-30 00:45:03,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 00:45:03,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 00:45:03,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1713 transitions. [2023-08-30 00:45:03,927 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43923076923076926 [2023-08-30 00:45:03,927 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1713 transitions. [2023-08-30 00:45:03,927 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1713 transitions. [2023-08-30 00:45:03,928 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:45:03,928 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1713 transitions. [2023-08-30 00:45:03,930 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) [2023-08-30 00:45:03,932 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) [2023-08-30 00:45:03,933 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) [2023-08-30 00:45:03,933 INFO L175 Difference]: Start difference. First operand has 97 places, 139 transitions, 913 flow. Second operand 6 states and 1713 transitions. [2023-08-30 00:45:03,933 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 178 transitions, 1349 flow [2023-08-30 00:45:03,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 178 transitions, 1348 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 00:45:03,957 INFO L231 Difference]: Finished difference. Result has 104 places, 141 transitions, 1026 flow [2023-08-30 00:45:03,957 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} [2023-08-30 00:45:03,957 INFO L281 CegarLoopForPetriNet]: 82 programPoint places, 22 predicate places. [2023-08-30 00:45:03,957 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 141 transitions, 1026 flow [2023-08-30 00:45:03,958 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) [2023-08-30 00:45:03,958 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:45:03,958 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1] [2023-08-30 00:45:03,967 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Ended with exit code 0 [2023-08-30 00:45:04,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:45:04,159 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2023-08-30 00:45:04,159 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:45:04,159 INFO L85 PathProgramCache]: Analyzing trace with hash 979440244, now seen corresponding path program 3 times [2023-08-30 00:45:04,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:45:04,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [880389131] [2023-08-30 00:45:04,160 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 00:45:04,160 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:45:04,160 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:45:04,161 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:45:04,161 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2023-08-30 00:45:04,308 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-08-30 00:45:04,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:45:04,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-30 00:45:04,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:45:04,402 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 00:45:04,402 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 [2023-08-30 00:45:04,752 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:45:04,752 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:45:06,874 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:45:06,875 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:45:06,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [880389131] [2023-08-30 00:45:06,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [880389131] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:45:06,875 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:45:06,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2023-08-30 00:45:06,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053203335] [2023-08-30 00:45:06,876 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:45:06,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-30 00:45:06,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:45:06,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-30 00:45:06,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2023-08-30 00:45:37,603 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 255 out of 650 [2023-08-30 00:45:37,606 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) [2023-08-30 00:45:37,606 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:45:37,606 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 255 of 650 [2023-08-30 00:45:37,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:45:46,806 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:45:48,807 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:45:50,810 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:45:52,813 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:45:54,815 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:45:56,817 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:45:58,820 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:46:00,822 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:46:02,825 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:46:04,827 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:46:08,285 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:46:10,287 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:46:12,289 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:46:14,292 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:46:16,294 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:46:18,207 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.91s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:46:20,209 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:46:22,211 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:46:24,214 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:46:26,216 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:46:32,322 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:46:34,324 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:46:36,327 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:46:38,318 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.99s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:46:40,114 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.80s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:46:42,116 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:46:44,118 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:46:46,121 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:46:48,123 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:46:51,017 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:47:09,137 INFO L130 PetriNetUnfolder]: 120646/156225 cut-off events. [2023-08-30 00:47:09,138 INFO L131 PetriNetUnfolder]: For 11812/11914 co-relation queries the response was YES. [2023-08-30 00:47:09,905 INFO L83 FinitePrefix]: Finished finitePrefix Result has 374969 conditions, 156225 events. 120646/156225 cut-off events. For 11812/11914 co-relation queries the response was YES. Maximal size of possible extension queue 5023. Compared 1002858 event pairs, 69043 based on Foata normal form. 126/70652 useless extension candidates. Maximal degree in co-relation 374934. Up to 32416 conditions per place. [2023-08-30 00:47:10,594 INFO L137 encePairwiseOnDemand]: 637/650 looper letters, 651 selfloop transitions, 115 changer transitions 2/776 dead transitions. [2023-08-30 00:47:10,594 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 776 transitions, 4660 flow [2023-08-30 00:47:10,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-30 00:47:10,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-30 00:47:10,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 6909 transitions. [2023-08-30 00:47:10,606 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4428846153846154 [2023-08-30 00:47:10,606 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 6909 transitions. [2023-08-30 00:47:10,606 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 6909 transitions. [2023-08-30 00:47:10,608 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:47:10,608 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 6909 transitions. [2023-08-30 00:47:10,615 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 287.875) internal successors, (6909), 24 states have internal predecessors, (6909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:47:10,631 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 650.0) internal successors, (16250), 25 states have internal predecessors, (16250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:47:10,632 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 650.0) internal successors, (16250), 25 states have internal predecessors, (16250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:47:10,632 INFO L175 Difference]: Start difference. First operand has 104 places, 141 transitions, 1026 flow. Second operand 24 states and 6909 transitions. [2023-08-30 00:47:10,632 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 776 transitions, 4660 flow [2023-08-30 00:47:10,743 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 776 transitions, 4544 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-30 00:47:10,749 INFO L231 Difference]: Finished difference. Result has 138 places, 185 transitions, 1656 flow [2023-08-30 00:47:10,750 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=24, PETRI_FLOW=1656, PETRI_PLACES=138, PETRI_TRANSITIONS=185} [2023-08-30 00:47:10,750 INFO L281 CegarLoopForPetriNet]: 82 programPoint places, 56 predicate places. [2023-08-30 00:47:10,750 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 185 transitions, 1656 flow [2023-08-30 00:47:10,751 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) [2023-08-30 00:47:10,752 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:47:10,752 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:47:10,762 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2023-08-30 00:47:10,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:47:10,962 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2023-08-30 00:47:10,962 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:47:10,962 INFO L85 PathProgramCache]: Analyzing trace with hash -1685242000, now seen corresponding path program 1 times [2023-08-30 00:47:10,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:47:10,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1458633939] [2023-08-30 00:47:10,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:47:10,963 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:47:10,963 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:47:10,964 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:47:10,965 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2023-08-30 00:47:11,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:47:11,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 00:47:11,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:47:11,217 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-08-30 00:47:11,218 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 [2023-08-30 00:47:11,244 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-08-30 00:47:11,245 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2023-08-30 00:47:11,270 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-08-30 00:47:11,270 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2023-08-30 00:47:11,283 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-08-30 00:47:11,283 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-08-30 00:47:11,296 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 00:47:11,296 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:47:11,296 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:47:11,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1458633939] [2023-08-30 00:47:11,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1458633939] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:47:11,296 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:47:11,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 00:47:11,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042579673] [2023-08-30 00:47:11,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:47:11,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 00:47:11,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:47:11,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 00:47:11,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 00:47:11,591 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 263 out of 650 [2023-08-30 00:47:11,592 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 185 transitions, 1656 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) [2023-08-30 00:47:11,592 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:47:11,592 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 263 of 650 [2023-08-30 00:47:11,592 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:47:23,491 INFO L130 PetriNetUnfolder]: 87903/114277 cut-off events. [2023-08-30 00:47:23,492 INFO L131 PetriNetUnfolder]: For 7364/7456 co-relation queries the response was YES. [2023-08-30 00:47:24,295 INFO L83 FinitePrefix]: Finished finitePrefix Result has 270927 conditions, 114277 events. 87903/114277 cut-off events. For 7364/7456 co-relation queries the response was YES. Maximal size of possible extension queue 3580. Compared 718980 event pairs, 50863 based on Foata normal form. 92/56070 useless extension candidates. Maximal degree in co-relation 270879. Up to 113037 conditions per place. [2023-08-30 00:47:24,667 INFO L137 encePairwiseOnDemand]: 645/650 looper letters, 150 selfloop transitions, 24 changer transitions 0/182 dead transitions. [2023-08-30 00:47:24,667 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 182 transitions, 1994 flow [2023-08-30 00:47:24,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 00:47:24,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 00:47:24,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1108 transitions. [2023-08-30 00:47:24,670 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42615384615384616 [2023-08-30 00:47:24,670 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1108 transitions. [2023-08-30 00:47:24,671 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1108 transitions. [2023-08-30 00:47:24,671 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:47:24,671 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1108 transitions. [2023-08-30 00:47:24,672 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) [2023-08-30 00:47:24,674 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) [2023-08-30 00:47:24,675 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) [2023-08-30 00:47:24,675 INFO L175 Difference]: Start difference. First operand has 138 places, 185 transitions, 1656 flow. Second operand 4 states and 1108 transitions. [2023-08-30 00:47:24,675 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 182 transitions, 1994 flow [2023-08-30 00:47:24,709 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 182 transitions, 1755 flow, removed 42 selfloop flow, removed 10 redundant places. [2023-08-30 00:47:24,711 INFO L231 Difference]: Finished difference. Result has 128 places, 182 transitions, 1455 flow [2023-08-30 00:47:24,711 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=650, PETRI_DIFFERENCE_MINUEND_FLOW=1407, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1455, PETRI_PLACES=128, PETRI_TRANSITIONS=182} [2023-08-30 00:47:24,711 INFO L281 CegarLoopForPetriNet]: 82 programPoint places, 46 predicate places. [2023-08-30 00:47:24,712 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 182 transitions, 1455 flow [2023-08-30 00:47:24,712 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) [2023-08-30 00:47:24,712 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:47:24,712 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:47:24,721 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 [2023-08-30 00:47:24,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:47:24,917 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2023-08-30 00:47:24,917 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:47:24,917 INFO L85 PathProgramCache]: Analyzing trace with hash -1685241804, now seen corresponding path program 1 times [2023-08-30 00:47:24,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:47:24,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [44673068] [2023-08-30 00:47:24,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:47:24,918 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:47:24,918 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:47:24,919 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:47:24,919 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2023-08-30 00:47:25,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:47:25,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 00:47:25,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:47:25,116 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 0 case distinctions, treesize of input 6 treesize of output 7 [2023-08-30 00:47:25,137 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-08-30 00:47:25,138 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2023-08-30 00:47:25,155 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-08-30 00:47:25,156 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-08-30 00:47:25,167 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 00:47:25,167 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:47:25,167 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:47:25,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [44673068] [2023-08-30 00:47:25,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [44673068] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:47:25,168 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:47:25,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 00:47:25,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288237769] [2023-08-30 00:47:25,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:47:25,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 00:47:25,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:47:25,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 00:47:25,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 00:47:25,469 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 263 out of 650 [2023-08-30 00:47:25,470 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 182 transitions, 1455 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) [2023-08-30 00:47:25,470 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:47:25,470 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 263 of 650 [2023-08-30 00:47:25,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand