./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test4-3.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 3a877d22 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 ../sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test4-3.i -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 c24ad121bcc9573550d02da9627a07166858762ae4177dec26b10c884148a83b --- Real Ultimate output --- This is Ultimate 0.2.2-3a877d227dc491413fd706022d0c47cd97beb353-3a877d2 [2021-12-15 16:48:06,585 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 16:48:06,587 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 16:48:06,611 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 16:48:06,612 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 16:48:06,614 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 16:48:06,615 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 16:48:06,616 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 16:48:06,617 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 16:48:06,617 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 16:48:06,618 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 16:48:06,619 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 16:48:06,619 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 16:48:06,620 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 16:48:06,621 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 16:48:06,626 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 16:48:06,628 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 16:48:06,629 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 16:48:06,632 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 16:48:06,638 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 16:48:06,641 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 16:48:06,645 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 16:48:06,646 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 16:48:06,648 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 16:48:06,650 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 16:48:06,653 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 16:48:06,653 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 16:48:06,654 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 16:48:06,655 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 16:48:06,655 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 16:48:06,656 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 16:48:06,657 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 16:48:06,658 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 16:48:06,658 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 16:48:06,659 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 16:48:06,659 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 16:48:06,660 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 16:48:06,660 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 16:48:06,660 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 16:48:06,662 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 16:48:06,662 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 16:48:06,663 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-12-15 16:48:06,692 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 16:48:06,693 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 16:48:06,693 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 16:48:06,693 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 16:48:06,694 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 16:48:06,694 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 16:48:06,695 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 16:48:06,695 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 16:48:06,695 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 16:48:06,695 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 16:48:06,696 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 16:48:06,696 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-15 16:48:06,696 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 16:48:06,696 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 16:48:06,696 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 16:48:06,697 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-15 16:48:06,697 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-15 16:48:06,697 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-15 16:48:06,697 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 16:48:06,697 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-15 16:48:06,697 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 16:48:06,697 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 16:48:06,698 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 16:48:06,698 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 16:48:06,698 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 16:48:06,698 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 16:48:06,699 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 16:48:06,699 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 16:48:06,699 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 16:48:06,699 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 16:48:06,699 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 16:48:06,699 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c24ad121bcc9573550d02da9627a07166858762ae4177dec26b10c884148a83b [2021-12-15 16:48:06,928 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 16:48:06,946 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 16:48:06,948 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 16:48:06,949 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 16:48:06,949 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 16:48:06,950 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test4-3.i [2021-12-15 16:48:07,014 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a4f215c25/68456d82d32e4d50bf2e4947f491d25b/FLAG9864c30fb [2021-12-15 16:48:07,444 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 16:48:07,444 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test4-3.i [2021-12-15 16:48:07,453 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a4f215c25/68456d82d32e4d50bf2e4947f491d25b/FLAG9864c30fb [2021-12-15 16:48:07,775 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a4f215c25/68456d82d32e4d50bf2e4947f491d25b [2021-12-15 16:48:07,779 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 16:48:07,781 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 16:48:07,788 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 16:48:07,788 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 16:48:07,790 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 16:48:07,791 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 04:48:07" (1/1) ... [2021-12-15 16:48:07,793 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a7cc208 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 04:48:07, skipping insertion in model container [2021-12-15 16:48:07,793 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 04:48:07" (1/1) ... [2021-12-15 16:48:07,798 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 16:48:07,867 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 16:48:08,156 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test4-3.i[33021,33034] [2021-12-15 16:48:08,260 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 16:48:08,268 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-12-15 16:48:08,269 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@24da6e4a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 04:48:08, skipping insertion in model container [2021-12-15 16:48:08,269 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 16:48:08,269 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-12-15 16:48:08,271 INFO L158 Benchmark]: Toolchain (without parser) took 489.52ms. Allocated memory is still 98.6MB. Free memory was 57.2MB in the beginning and 62.6MB in the end (delta: -5.3MB). Peak memory consumption was 6.5MB. Max. memory is 16.1GB. [2021-12-15 16:48:08,272 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 98.6MB. Free memory is still 75.9MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-15 16:48:08,272 INFO L158 Benchmark]: CACSL2BoogieTranslator took 481.89ms. Allocated memory is still 98.6MB. Free memory was 57.0MB in the beginning and 62.6MB in the end (delta: -5.5MB). Peak memory consumption was 6.5MB. Max. memory is 16.1GB. [2021-12-15 16:48:08,273 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 98.6MB. Free memory is still 75.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 481.89ms. Allocated memory is still 98.6MB. Free memory was 57.0MB in the beginning and 62.6MB in the end (delta: -5.5MB). Peak memory consumption was 6.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 752]: Unsupported Syntax Found a cast between two array/pointer types where the value type is smaller than the cast-to type 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 ../sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test4-3.i -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 c24ad121bcc9573550d02da9627a07166858762ae4177dec26b10c884148a83b --- Real Ultimate output --- This is Ultimate 0.2.2-3a877d227dc491413fd706022d0c47cd97beb353-3a877d2 [2021-12-15 16:48:10,057 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 16:48:10,059 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 16:48:10,085 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 16:48:10,086 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 16:48:10,089 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 16:48:10,091 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 16:48:10,094 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 16:48:10,095 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 16:48:10,096 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 16:48:10,097 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 16:48:10,098 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 16:48:10,099 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 16:48:10,103 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 16:48:10,104 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 16:48:10,105 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 16:48:10,106 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 16:48:10,107 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 16:48:10,108 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 16:48:10,120 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 16:48:10,121 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 16:48:10,122 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 16:48:10,123 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 16:48:10,123 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 16:48:10,125 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 16:48:10,125 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 16:48:10,125 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 16:48:10,126 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 16:48:10,127 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 16:48:10,127 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 16:48:10,131 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 16:48:10,132 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 16:48:10,133 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 16:48:10,133 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 16:48:10,134 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 16:48:10,134 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 16:48:10,135 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 16:48:10,135 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 16:48:10,135 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 16:48:10,136 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 16:48:10,136 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 16:48:10,138 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-12-15 16:48:10,165 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 16:48:10,165 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 16:48:10,166 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 16:48:10,166 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 16:48:10,167 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 16:48:10,167 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 16:48:10,168 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 16:48:10,168 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 16:48:10,169 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 16:48:10,169 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 16:48:10,169 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 16:48:10,170 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-15 16:48:10,170 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 16:48:10,170 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 16:48:10,170 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 16:48:10,170 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-15 16:48:10,170 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-15 16:48:10,171 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-15 16:48:10,171 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 16:48:10,171 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-15 16:48:10,171 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-12-15 16:48:10,171 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-12-15 16:48:10,171 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 16:48:10,171 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 16:48:10,172 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 16:48:10,180 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 16:48:10,180 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 16:48:10,180 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 16:48:10,181 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 16:48:10,181 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 16:48:10,181 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-12-15 16:48:10,181 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-12-15 16:48:10,181 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 16:48:10,182 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-12-15 16:48:10,182 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c24ad121bcc9573550d02da9627a07166858762ae4177dec26b10c884148a83b [2021-12-15 16:48:10,455 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 16:48:10,483 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 16:48:10,485 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 16:48:10,486 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 16:48:10,488 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 16:48:10,489 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test4-3.i [2021-12-15 16:48:10,539 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b7ae5949f/b2712c2ea0124106a7f71b8393aadce7/FLAG3a2b2f242 [2021-12-15 16:48:11,029 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 16:48:11,030 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test4-3.i [2021-12-15 16:48:11,041 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b7ae5949f/b2712c2ea0124106a7f71b8393aadce7/FLAG3a2b2f242 [2021-12-15 16:48:11,339 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b7ae5949f/b2712c2ea0124106a7f71b8393aadce7 [2021-12-15 16:48:11,341 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 16:48:11,342 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 16:48:11,344 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 16:48:11,345 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 16:48:11,349 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 16:48:11,350 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 04:48:11" (1/1) ... [2021-12-15 16:48:11,351 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5c4a1b24 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 04:48:11, skipping insertion in model container [2021-12-15 16:48:11,351 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 04:48:11" (1/1) ... [2021-12-15 16:48:11,358 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 16:48:11,412 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 16:48:11,774 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test4-3.i[33021,33034] [2021-12-15 16:48:11,893 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 16:48:11,913 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-12-15 16:48:11,929 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 16:48:11,954 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test4-3.i[33021,33034] [2021-12-15 16:48:12,043 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 16:48:12,048 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 16:48:12,083 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test4-3.i[33021,33034] [2021-12-15 16:48:12,141 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 16:48:12,170 INFO L208 MainTranslator]: Completed translation [2021-12-15 16:48:12,171 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 04:48:12 WrapperNode [2021-12-15 16:48:12,171 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 16:48:12,172 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 16:48:12,172 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 16:48:12,172 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 16:48:12,177 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 04:48:12" (1/1) ... [2021-12-15 16:48:12,223 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 04:48:12" (1/1) ... [2021-12-15 16:48:12,286 INFO L137 Inliner]: procedures = 180, calls = 448, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1473 [2021-12-15 16:48:12,286 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 16:48:12,287 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 16:48:12,287 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 16:48:12,287 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 16:48:12,293 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 04:48:12" (1/1) ... [2021-12-15 16:48:12,293 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 04:48:12" (1/1) ... [2021-12-15 16:48:12,306 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 04:48:12" (1/1) ... [2021-12-15 16:48:12,307 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 04:48:12" (1/1) ... [2021-12-15 16:48:12,362 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 04:48:12" (1/1) ... [2021-12-15 16:48:12,391 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 04:48:12" (1/1) ... [2021-12-15 16:48:12,396 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 04:48:12" (1/1) ... [2021-12-15 16:48:12,409 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 16:48:12,410 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 16:48:12,410 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 16:48:12,410 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 16:48:12,411 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 04:48:12" (1/1) ... [2021-12-15 16:48:12,419 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 16:48:12,427 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 16:48:12,437 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) [2021-12-15 16:48:12,457 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 [2021-12-15 16:48:12,470 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-12-15 16:48:12,470 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-12-15 16:48:12,470 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-15 16:48:12,471 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-15 16:48:12,472 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-12-15 16:48:12,472 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-12-15 16:48:12,472 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-15 16:48:12,472 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 16:48:12,472 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-15 16:48:12,472 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-15 16:48:12,473 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-15 16:48:12,473 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-15 16:48:12,473 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-12-15 16:48:12,473 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-12-15 16:48:12,473 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 16:48:12,473 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 16:48:12,730 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 16:48:12,732 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 16:48:12,735 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-15 16:48:17,230 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 16:48:17,245 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 16:48:17,245 INFO L301 CfgBuilder]: Removed 77 assume(true) statements. [2021-12-15 16:48:17,248 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 04:48:17 BoogieIcfgContainer [2021-12-15 16:48:17,248 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 16:48:17,249 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 16:48:17,250 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 16:48:17,252 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 16:48:17,252 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 04:48:11" (1/3) ... [2021-12-15 16:48:17,253 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13415e5c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 04:48:17, skipping insertion in model container [2021-12-15 16:48:17,253 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 04:48:12" (2/3) ... [2021-12-15 16:48:17,253 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13415e5c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 04:48:17, skipping insertion in model container [2021-12-15 16:48:17,253 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 04:48:17" (3/3) ... [2021-12-15 16:48:17,254 INFO L111 eAbstractionObserver]: Analyzing ICFG uthash_SFH_test4-3.i [2021-12-15 16:48:17,258 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 16:48:17,258 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 851 error locations. [2021-12-15 16:48:17,296 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 16:48:17,300 INFO L339 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=FINITE_AUTOMATA, 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, mLoopAccelerationTechnique=FAST_UPR [2021-12-15 16:48:17,300 INFO L340 AbstractCegarLoop]: Starting to check reachability of 851 error locations. [2021-12-15 16:48:17,328 INFO L276 IsEmpty]: Start isEmpty. Operand has 1651 states, 787 states have (on average 2.283354510800508) internal successors, (1797), 1642 states have internal predecessors, (1797), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 7 states have call predecessors, (16), 16 states have call successors, (16) [2021-12-15 16:48:17,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-12-15 16:48:17,333 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 16:48:17,333 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-12-15 16:48:17,334 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 847 more)] === [2021-12-15 16:48:17,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 16:48:17,338 INFO L85 PathProgramCache]: Analyzing trace with hash 37287509, now seen corresponding path program 1 times [2021-12-15 16:48:17,346 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-15 16:48:17,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1099530522] [2021-12-15 16:48:17,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 16:48:17,348 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-15 16:48:17,348 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-15 16:48:17,350 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-15 16:48:17,387 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-12-15 16:48:17,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 16:48:17,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 1 conjunts are in the unsatisfiable core [2021-12-15 16:48:17,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 16:48:17,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 16:48:17,549 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 16:48:17,549 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-15 16:48:17,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1099530522] [2021-12-15 16:48:17,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1099530522] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 16:48:17,550 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 16:48:17,550 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 16:48:17,551 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604229184] [2021-12-15 16:48:17,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 16:48:17,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-15 16:48:17,555 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-15 16:48:17,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-15 16:48:17,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-15 16:48:17,590 INFO L87 Difference]: Start difference. First operand has 1651 states, 787 states have (on average 2.283354510800508) internal successors, (1797), 1642 states have internal predecessors, (1797), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 7 states have call predecessors, (16), 16 states have call successors, (16) Second operand has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 16:48:17,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 16:48:17,683 INFO L93 Difference]: Finished difference Result 1633 states and 1726 transitions. [2021-12-15 16:48:17,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-15 16:48:17,685 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-12-15 16:48:17,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 16:48:17,713 INFO L225 Difference]: With dead ends: 1633 [2021-12-15 16:48:17,714 INFO L226 Difference]: Without dead ends: 1631 [2021-12-15 16:48:17,716 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-15 16:48:17,720 INFO L933 BasicCegarLoop]: 1726 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1726 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 16:48:17,722 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 1726 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 16:48:17,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1631 states. [2021-12-15 16:48:17,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1631 to 1631. [2021-12-15 16:48:17,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1631 states, 778 states have (on average 2.1748071979434447) internal successors, (1692), 1622 states have internal predecessors, (1692), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 7 states have call predecessors, (16), 16 states have call successors, (16) [2021-12-15 16:48:17,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1631 states to 1631 states and 1724 transitions. [2021-12-15 16:48:17,827 INFO L78 Accepts]: Start accepts. Automaton has 1631 states and 1724 transitions. Word has length 5 [2021-12-15 16:48:17,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 16:48:17,828 INFO L470 AbstractCegarLoop]: Abstraction has 1631 states and 1724 transitions. [2021-12-15 16:48:17,828 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 16:48:17,828 INFO L276 IsEmpty]: Start isEmpty. Operand 1631 states and 1724 transitions. [2021-12-15 16:48:17,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-12-15 16:48:17,828 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 16:48:17,829 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-12-15 16:48:17,835 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-12-15 16:48:18,034 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-15 16:48:18,035 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 847 more)] === [2021-12-15 16:48:18,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 16:48:18,035 INFO L85 PathProgramCache]: Analyzing trace with hash 37287571, now seen corresponding path program 1 times [2021-12-15 16:48:18,036 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-15 16:48:18,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1234438549] [2021-12-15 16:48:18,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 16:48:18,036 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-15 16:48:18,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-15 16:48:18,038 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-15 16:48:18,041 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-12-15 16:48:18,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 16:48:18,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-15 16:48:18,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 16:48:18,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-15 16:48:18,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 16:48:18,258 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 16:48:18,259 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-15 16:48:18,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1234438549] [2021-12-15 16:48:18,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1234438549] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 16:48:18,264 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 16:48:18,265 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 16:48:18,265 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785255686] [2021-12-15 16:48:18,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 16:48:18,266 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 16:48:18,266 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-15 16:48:18,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 16:48:18,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 16:48:18,267 INFO L87 Difference]: Start difference. First operand 1631 states and 1724 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 16:48:20,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 16:48:20,457 INFO L93 Difference]: Finished difference Result 1668 states and 1774 transitions. [2021-12-15 16:48:20,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 16:48:20,457 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-12-15 16:48:20,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 16:48:20,462 INFO L225 Difference]: With dead ends: 1668 [2021-12-15 16:48:20,462 INFO L226 Difference]: Without dead ends: 1668 [2021-12-15 16:48:20,463 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 16:48:20,464 INFO L933 BasicCegarLoop]: 996 mSDtfsCounter, 1159 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 927 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1175 SdHoareTripleChecker+Valid, 1291 SdHoareTripleChecker+Invalid, 1032 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 927 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-15 16:48:20,464 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1175 Valid, 1291 Invalid, 1032 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 927 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-12-15 16:48:20,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1668 states. [2021-12-15 16:48:20,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1668 to 1614. [2021-12-15 16:48:20,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1614 states, 854 states have (on average 2.030444964871194) internal successors, (1734), 1605 states have internal predecessors, (1734), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 7 states have call predecessors, (16), 16 states have call successors, (16) [2021-12-15 16:48:20,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1614 states to 1614 states and 1766 transitions. [2021-12-15 16:48:20,493 INFO L78 Accepts]: Start accepts. Automaton has 1614 states and 1766 transitions. Word has length 5 [2021-12-15 16:48:20,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 16:48:20,494 INFO L470 AbstractCegarLoop]: Abstraction has 1614 states and 1766 transitions. [2021-12-15 16:48:20,494 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 16:48:20,494 INFO L276 IsEmpty]: Start isEmpty. Operand 1614 states and 1766 transitions. [2021-12-15 16:48:20,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-12-15 16:48:20,495 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 16:48:20,495 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-12-15 16:48:20,501 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-12-15 16:48:20,701 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-15 16:48:20,701 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 847 more)] === [2021-12-15 16:48:20,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 16:48:20,702 INFO L85 PathProgramCache]: Analyzing trace with hash 37287572, now seen corresponding path program 1 times [2021-12-15 16:48:20,702 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-15 16:48:20,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1894631603] [2021-12-15 16:48:20,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 16:48:20,703 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-15 16:48:20,703 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-15 16:48:20,705 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-15 16:48:20,707 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-12-15 16:48:20,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 16:48:20,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-15 16:48:20,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 16:48:20,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-15 16:48:20,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 16:48:20,845 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 16:48:20,845 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-15 16:48:20,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1894631603] [2021-12-15 16:48:20,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1894631603] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 16:48:20,845 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 16:48:20,846 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 16:48:20,846 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039776182] [2021-12-15 16:48:20,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 16:48:20,846 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 16:48:20,846 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-15 16:48:20,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 16:48:20,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 16:48:20,847 INFO L87 Difference]: Start difference. First operand 1614 states and 1766 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 16:48:23,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 16:48:23,803 INFO L93 Difference]: Finished difference Result 1917 states and 2089 transitions. [2021-12-15 16:48:23,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 16:48:23,803 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-12-15 16:48:23,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 16:48:23,808 INFO L225 Difference]: With dead ends: 1917 [2021-12-15 16:48:23,808 INFO L226 Difference]: Without dead ends: 1917 [2021-12-15 16:48:23,809 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 16:48:23,809 INFO L933 BasicCegarLoop]: 1392 mSDtfsCounter, 504 mSDsluCounter, 684 mSDsCounter, 0 mSdLazyCounter, 992 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 504 SdHoareTripleChecker+Valid, 2076 SdHoareTripleChecker+Invalid, 1015 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 992 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-12-15 16:48:23,810 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [504 Valid, 2076 Invalid, 1015 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 992 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2021-12-15 16:48:23,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1917 states. [2021-12-15 16:48:23,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1917 to 1770. [2021-12-15 16:48:23,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1770 states, 1020 states have (on average 2.0) internal successors, (2040), 1761 states have internal predecessors, (2040), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 7 states have call predecessors, (16), 16 states have call successors, (16) [2021-12-15 16:48:23,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1770 states to 1770 states and 2072 transitions. [2021-12-15 16:48:23,846 INFO L78 Accepts]: Start accepts. Automaton has 1770 states and 2072 transitions. Word has length 5 [2021-12-15 16:48:23,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 16:48:23,846 INFO L470 AbstractCegarLoop]: Abstraction has 1770 states and 2072 transitions. [2021-12-15 16:48:23,846 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 16:48:23,846 INFO L276 IsEmpty]: Start isEmpty. Operand 1770 states and 2072 transitions. [2021-12-15 16:48:23,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-15 16:48:23,846 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 16:48:23,847 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-15 16:48:23,855 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-12-15 16:48:24,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-15 16:48:24,047 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr640REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 847 more)] === [2021-12-15 16:48:24,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 16:48:24,048 INFO L85 PathProgramCache]: Analyzing trace with hash 1157601995, now seen corresponding path program 1 times [2021-12-15 16:48:24,048 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-15 16:48:24,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1388846433] [2021-12-15 16:48:24,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 16:48:24,048 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-15 16:48:24,048 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-15 16:48:24,051 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-15 16:48:24,052 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-12-15 16:48:24,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 16:48:24,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 25 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 16:48:24,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 16:48:24,170 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 16:48:24,171 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 16:48:24,171 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-15 16:48:24,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1388846433] [2021-12-15 16:48:24,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1388846433] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 16:48:24,172 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 16:48:24,172 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 16:48:24,172 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795553825] [2021-12-15 16:48:24,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 16:48:24,173 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 16:48:24,173 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-15 16:48:24,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 16:48:24,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 16:48:24,174 INFO L87 Difference]: Start difference. First operand 1770 states and 2072 transitions. Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 16:48:24,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 16:48:24,282 INFO L93 Difference]: Finished difference Result 3114 states and 3679 transitions. [2021-12-15 16:48:24,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 16:48:24,287 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-12-15 16:48:24,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 16:48:24,302 INFO L225 Difference]: With dead ends: 3114 [2021-12-15 16:48:24,302 INFO L226 Difference]: Without dead ends: 3114 [2021-12-15 16:48:24,303 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 16:48:24,306 INFO L933 BasicCegarLoop]: 1900 mSDtfsCounter, 1143 mSDsluCounter, 1616 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1149 SdHoareTripleChecker+Valid, 3516 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 16:48:24,308 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1149 Valid, 3516 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 16:48:24,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3114 states. [2021-12-15 16:48:24,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3114 to 1771. [2021-12-15 16:48:24,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1771 states, 1021 states have (on average 1.999020568070519) internal successors, (2041), 1762 states have internal predecessors, (2041), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 7 states have call predecessors, (16), 16 states have call successors, (16) [2021-12-15 16:48:24,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1771 states to 1771 states and 2073 transitions. [2021-12-15 16:48:24,379 INFO L78 Accepts]: Start accepts. Automaton has 1771 states and 2073 transitions. Word has length 6 [2021-12-15 16:48:24,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 16:48:24,380 INFO L470 AbstractCegarLoop]: Abstraction has 1771 states and 2073 transitions. [2021-12-15 16:48:24,380 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 16:48:24,380 INFO L276 IsEmpty]: Start isEmpty. Operand 1771 states and 2073 transitions. [2021-12-15 16:48:24,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-15 16:48:24,380 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 16:48:24,381 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 16:48:24,391 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-12-15 16:48:24,581 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-15 16:48:24,581 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 847 more)] === [2021-12-15 16:48:24,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 16:48:24,582 INFO L85 PathProgramCache]: Analyzing trace with hash 334651453, now seen corresponding path program 1 times [2021-12-15 16:48:24,582 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-15 16:48:24,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1625989825] [2021-12-15 16:48:24,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 16:48:24,582 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-15 16:48:24,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-15 16:48:24,583 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-15 16:48:24,636 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-12-15 16:48:24,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 16:48:24,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 16:48:24,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 16:48:24,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 16:48:24,803 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 16:48:24,803 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-15 16:48:24,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1625989825] [2021-12-15 16:48:24,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1625989825] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 16:48:24,803 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 16:48:24,803 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 16:48:24,804 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724026776] [2021-12-15 16:48:24,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 16:48:24,804 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 16:48:24,804 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-15 16:48:24,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 16:48:24,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 16:48:24,805 INFO L87 Difference]: Start difference. First operand 1771 states and 2073 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 16:48:24,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 16:48:24,833 INFO L93 Difference]: Finished difference Result 1735 states and 2036 transitions. [2021-12-15 16:48:24,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 16:48:24,834 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-12-15 16:48:24,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 16:48:24,840 INFO L225 Difference]: With dead ends: 1735 [2021-12-15 16:48:24,841 INFO L226 Difference]: Without dead ends: 1735 [2021-12-15 16:48:24,842 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 16:48:24,842 INFO L933 BasicCegarLoop]: 1573 mSDtfsCounter, 1533 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1549 SdHoareTripleChecker+Valid, 1606 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 16:48:24,843 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1549 Valid, 1606 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 16:48:24,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1735 states. [2021-12-15 16:48:24,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1735 to 1729. [2021-12-15 16:48:24,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1729 states, 1003 states have (on average 1.992023928215354) internal successors, (1998), 1720 states have internal predecessors, (1998), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 7 states have call predecessors, (16), 16 states have call successors, (16) [2021-12-15 16:48:24,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1729 states to 1729 states and 2030 transitions. [2021-12-15 16:48:24,876 INFO L78 Accepts]: Start accepts. Automaton has 1729 states and 2030 transitions. Word has length 11 [2021-12-15 16:48:24,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 16:48:24,877 INFO L470 AbstractCegarLoop]: Abstraction has 1729 states and 2030 transitions. [2021-12-15 16:48:24,877 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 16:48:24,877 INFO L276 IsEmpty]: Start isEmpty. Operand 1729 states and 2030 transitions. [2021-12-15 16:48:24,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-15 16:48:24,877 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 16:48:24,878 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 16:48:24,898 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-12-15 16:48:25,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-15 16:48:25,087 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 847 more)] === [2021-12-15 16:48:25,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 16:48:25,089 INFO L85 PathProgramCache]: Analyzing trace with hash -522505033, now seen corresponding path program 1 times [2021-12-15 16:48:25,089 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-15 16:48:25,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [357660037] [2021-12-15 16:48:25,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 16:48:25,090 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-15 16:48:25,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-15 16:48:25,108 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-15 16:48:25,109 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-12-15 16:48:25,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 16:48:25,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-15 16:48:25,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 16:48:25,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 16:48:25,306 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 16:48:25,306 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-15 16:48:25,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [357660037] [2021-12-15 16:48:25,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [357660037] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 16:48:25,307 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 16:48:25,307 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 16:48:25,307 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298433105] [2021-12-15 16:48:25,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 16:48:25,307 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 16:48:25,307 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-15 16:48:25,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 16:48:25,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 16:48:25,308 INFO L87 Difference]: Start difference. First operand 1729 states and 2030 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 16:48:25,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 16:48:25,377 INFO L93 Difference]: Finished difference Result 1714 states and 2008 transitions. [2021-12-15 16:48:25,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 16:48:25,378 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-12-15 16:48:25,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 16:48:25,384 INFO L225 Difference]: With dead ends: 1714 [2021-12-15 16:48:25,384 INFO L226 Difference]: Without dead ends: 1714 [2021-12-15 16:48:25,385 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 16:48:25,386 INFO L933 BasicCegarLoop]: 1528 mSDtfsCounter, 1504 mSDsluCounter, 1554 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1520 SdHoareTripleChecker+Valid, 3082 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 16:48:25,386 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1520 Valid, 3082 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 16:48:25,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1714 states. [2021-12-15 16:48:25,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1714 to 1707. [2021-12-15 16:48:25,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1707 states, 995 states have (on average 1.9788944723618092) internal successors, (1969), 1698 states have internal predecessors, (1969), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 7 states have call predecessors, (16), 16 states have call successors, (16) [2021-12-15 16:48:25,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1707 states to 1707 states and 2001 transitions. [2021-12-15 16:48:25,416 INFO L78 Accepts]: Start accepts. Automaton has 1707 states and 2001 transitions. Word has length 13 [2021-12-15 16:48:25,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 16:48:25,417 INFO L470 AbstractCegarLoop]: Abstraction has 1707 states and 2001 transitions. [2021-12-15 16:48:25,417 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 16:48:25,417 INFO L276 IsEmpty]: Start isEmpty. Operand 1707 states and 2001 transitions. [2021-12-15 16:48:25,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-15 16:48:25,418 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 16:48:25,418 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 16:48:25,428 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2021-12-15 16:48:25,625 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-15 16:48:25,626 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr42REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 847 more)] === [2021-12-15 16:48:25,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 16:48:25,626 INFO L85 PathProgramCache]: Analyzing trace with hash -22216187, now seen corresponding path program 1 times [2021-12-15 16:48:25,626 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-15 16:48:25,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1025692045] [2021-12-15 16:48:25,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 16:48:25,627 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-15 16:48:25,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-15 16:48:25,628 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-15 16:48:25,628 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-12-15 16:48:25,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 16:48:25,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-15 16:48:25,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 16:48:25,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-15 16:48:25,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 16:48:25,850 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 16:48:25,850 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-15 16:48:25,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1025692045] [2021-12-15 16:48:25,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1025692045] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 16:48:25,850 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 16:48:25,850 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 16:48:25,850 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932092145] [2021-12-15 16:48:25,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 16:48:25,851 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 16:48:25,851 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-15 16:48:25,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 16:48:25,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 16:48:25,851 INFO L87 Difference]: Start difference. First operand 1707 states and 2001 transitions. Second operand has 4 states, 3 states have (on average 9.0) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 16:48:26,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 16:48:26,014 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 16:48:26,015 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 164 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-15 16:48:26,015 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 73 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-15 16:48:26,024 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2021-12-15 16:48:26,216 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-15 16:48:26,219 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.UnsupportedOperationException: Set is immutable at de.uni_freiburg.informatik.ultimate.util.datastructures.ImmutableSet.retainAll(ImmutableSet.java:338) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.UnmodifiableTransFormula.removeSuperfluousVars(UnmodifiableTransFormula.java:212) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaBuilder.finishConstruction(TransFormulaBuilder.java:273) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.OldVarsAssignmentCache.constructOldVarsAssignment(OldVarsAssignmentCache.java:125) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.OldVarsAssignmentCache.getOldVarsAssignment(OldVarsAssignmentCache.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.assertCodeBlock(IncrementalHoareTripleChecker.java:387) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.prepareAssertionStackAndAddTransition(IncrementalHoareTripleChecker.java:206) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.checkReturn(IncrementalHoareTripleChecker.java:170) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker$ProtectedHtc.checkReturn(ChainingHoareTripleChecker.java:486) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker.checkReturn(ChainingHoareTripleChecker.java:128) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.CachingHoareTripleChecker.checkReturn(CachingHoareTripleChecker.java:153) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton$ReturnSuccessorComputationHelper.computeSuccWithSolver(AbstractInterpolantAutomaton.java:442) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.addOtherSuccessors(DeterministicInterpolantAutomaton.java:198) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:78) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.returnSuccessors(AbstractInterpolantAutomaton.java:279) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.returnSuccessors(AbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.TotalizeNwa.returnSuccessors(TotalizeNwa.java:308) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ComplementDeterministicNwa.returnSuccessors(ComplementDeterministicNwa.java:142) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.returnSuccessors(ProductNwa.java:284) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.returnSuccessorsGivenHier(ProductNwa.java:308) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.addReturnsAndSuccessors(NestedWordAutomatonReachableStates.java:1118) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.(NestedWordAutomatonReachableStates.java:950) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates.(NestedWordAutomatonReachableStates.java:182) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.computeDifference(Difference.java:137) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.(Difference.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:868) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:784) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.refineAbstractionInternal(AbstractCegarLoop.java:462) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:420) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-12-15 16:48:26,223 INFO L158 Benchmark]: Toolchain (without parser) took 14881.04ms. Allocated memory was 52.4MB in the beginning and 146.8MB in the end (delta: 94.4MB). Free memory was 27.1MB in the beginning and 40.3MB in the end (delta: -13.2MB). Peak memory consumption was 79.7MB. Max. memory is 16.1GB. [2021-12-15 16:48:26,223 INFO L158 Benchmark]: CDTParser took 0.45ms. Allocated memory is still 52.4MB. Free memory was 34.8MB in the beginning and 34.8MB in the end (delta: 46.3kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-15 16:48:26,223 INFO L158 Benchmark]: CACSL2BoogieTranslator took 826.97ms. Allocated memory was 52.4MB in the beginning and 65.0MB in the end (delta: 12.6MB). Free memory was 26.9MB in the beginning and 28.8MB in the end (delta: -1.9MB). Peak memory consumption was 12.7MB. Max. memory is 16.1GB. [2021-12-15 16:48:26,223 INFO L158 Benchmark]: Boogie Procedure Inliner took 114.24ms. Allocated memory is still 65.0MB. Free memory was 28.8MB in the beginning and 36.2MB in the end (delta: -7.4MB). Peak memory consumption was 2.3MB. Max. memory is 16.1GB. [2021-12-15 16:48:26,224 INFO L158 Benchmark]: Boogie Preprocessor took 122.71ms. Allocated memory was 65.0MB in the beginning and 79.7MB in the end (delta: 14.7MB). Free memory was 36.2MB in the beginning and 52.2MB in the end (delta: -16.0MB). Peak memory consumption was 15.1MB. Max. memory is 16.1GB. [2021-12-15 16:48:26,224 INFO L158 Benchmark]: RCFGBuilder took 4838.05ms. Allocated memory was 79.7MB in the beginning and 121.6MB in the end (delta: 41.9MB). Free memory was 52.2MB in the beginning and 79.7MB in the end (delta: -27.5MB). Peak memory consumption was 54.1MB. Max. memory is 16.1GB. [2021-12-15 16:48:26,224 INFO L158 Benchmark]: TraceAbstraction took 8972.99ms. Allocated memory was 121.6MB in the beginning and 146.8MB in the end (delta: 25.2MB). Free memory was 78.8MB in the beginning and 40.3MB in the end (delta: 38.5MB). Peak memory consumption was 63.4MB. Max. memory is 16.1GB. [2021-12-15 16:48:26,225 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.45ms. Allocated memory is still 52.4MB. Free memory was 34.8MB in the beginning and 34.8MB in the end (delta: 46.3kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 826.97ms. Allocated memory was 52.4MB in the beginning and 65.0MB in the end (delta: 12.6MB). Free memory was 26.9MB in the beginning and 28.8MB in the end (delta: -1.9MB). Peak memory consumption was 12.7MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 114.24ms. Allocated memory is still 65.0MB. Free memory was 28.8MB in the beginning and 36.2MB in the end (delta: -7.4MB). Peak memory consumption was 2.3MB. Max. memory is 16.1GB. * Boogie Preprocessor took 122.71ms. Allocated memory was 65.0MB in the beginning and 79.7MB in the end (delta: 14.7MB). Free memory was 36.2MB in the beginning and 52.2MB in the end (delta: -16.0MB). Peak memory consumption was 15.1MB. Max. memory is 16.1GB. * RCFGBuilder took 4838.05ms. Allocated memory was 79.7MB in the beginning and 121.6MB in the end (delta: 41.9MB). Free memory was 52.2MB in the beginning and 79.7MB in the end (delta: -27.5MB). Peak memory consumption was 54.1MB. Max. memory is 16.1GB. * TraceAbstraction took 8972.99ms. Allocated memory was 121.6MB in the beginning and 146.8MB in the end (delta: 25.2MB). Free memory was 78.8MB in the beginning and 40.3MB in the end (delta: 38.5MB). Peak memory consumption was 63.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: UnsupportedOperationException: Set is immutable de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: UnsupportedOperationException: Set is immutable: de.uni_freiburg.informatik.ultimate.util.datastructures.ImmutableSet.retainAll(ImmutableSet.java:338) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-12-15 16:48:26,266 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: ERROR: ExceptionOrErrorResult: UnsupportedOperationException: Set is immutable