./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/pthread-memsafety/list1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version eb692b52 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/pthread-memsafety/list1.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 1da30149a66945688e686f90b0d1749d09e30bdcfdeae7b4325d99ddbe3a8206 --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-20 06:33:45,947 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-20 06:33:45,984 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-20 06:33:46,028 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-20 06:33:46,028 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-20 06:33:46,029 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-20 06:33:46,030 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-20 06:33:46,031 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-20 06:33:46,032 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-20 06:33:46,033 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-20 06:33:46,033 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-20 06:33:46,034 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-20 06:33:46,034 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-20 06:33:46,035 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-20 06:33:46,036 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-20 06:33:46,036 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-20 06:33:46,037 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-20 06:33:46,042 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-20 06:33:46,044 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-20 06:33:46,050 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-20 06:33:46,051 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-20 06:33:46,055 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-20 06:33:46,055 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-20 06:33:46,056 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-20 06:33:46,056 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-20 06:33:46,059 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-20 06:33:46,060 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-20 06:33:46,061 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-20 06:33:46,062 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-20 06:33:46,062 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-20 06:33:46,063 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-20 06:33:46,064 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-20 06:33:46,065 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-20 06:33:46,066 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-20 06:33:46,066 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-20 06:33:46,067 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-20 06:33:46,067 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-20 06:33:46,068 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-20 06:33:46,068 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-20 06:33:46,068 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-20 06:33:46,069 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-20 06:33:46,070 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-20 06:33:46,071 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-07-20 06:33:46,101 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-20 06:33:46,102 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-20 06:33:46,102 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-20 06:33:46,102 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-20 06:33:46,103 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-20 06:33:46,103 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-20 06:33:46,104 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-20 06:33:46,104 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-20 06:33:46,104 INFO L138 SettingsManager]: * Use SBE=true [2022-07-20 06:33:46,105 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-20 06:33:46,105 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-20 06:33:46,105 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-20 06:33:46,105 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-20 06:33:46,105 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-20 06:33:46,105 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-20 06:33:46,106 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-20 06:33:46,106 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-20 06:33:46,106 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-20 06:33:46,106 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-20 06:33:46,106 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-20 06:33:46,106 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-20 06:33:46,106 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-20 06:33:46,107 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-20 06:33:46,107 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-20 06:33:46,107 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-20 06:33:46,107 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-20 06:33:46,107 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-20 06:33:46,107 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-20 06:33:46,108 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-20 06:33:46,108 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-20 06:33:46,108 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1da30149a66945688e686f90b0d1749d09e30bdcfdeae7b4325d99ddbe3a8206 [2022-07-20 06:33:46,292 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-20 06:33:46,316 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-20 06:33:46,317 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-20 06:33:46,318 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-20 06:33:46,319 INFO L275 PluginConnector]: CDTParser initialized [2022-07-20 06:33:46,320 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread-memsafety/list1.i [2022-07-20 06:33:46,381 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4a3d24815/18bdfe1de8c347dc8a2acfc6c6f67d20/FLAG6a2f7b73f [2022-07-20 06:33:46,791 INFO L306 CDTParser]: Found 1 translation units. [2022-07-20 06:33:46,792 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-memsafety/list1.i [2022-07-20 06:33:46,805 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4a3d24815/18bdfe1de8c347dc8a2acfc6c6f67d20/FLAG6a2f7b73f [2022-07-20 06:33:46,818 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4a3d24815/18bdfe1de8c347dc8a2acfc6c6f67d20 [2022-07-20 06:33:46,819 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-20 06:33:46,820 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-20 06:33:46,821 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-20 06:33:46,821 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-20 06:33:46,823 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-20 06:33:46,824 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 06:33:46" (1/1) ... [2022-07-20 06:33:46,824 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5daee0d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:33:46, skipping insertion in model container [2022-07-20 06:33:46,825 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 06:33:46" (1/1) ... [2022-07-20 06:33:46,829 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-20 06:33:46,873 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-20 06:33:47,224 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 06:33:47,232 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2022-07-20 06:33:47,233 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@3cf9c08c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:33:47, skipping insertion in model container [2022-07-20 06:33:47,233 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-20 06:33:47,234 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-07-20 06:33:47,235 INFO L158 Benchmark]: Toolchain (without parser) took 413.95ms. Allocated memory was 83.9MB in the beginning and 100.7MB in the end (delta: 16.8MB). Free memory was 47.2MB in the beginning and 72.3MB in the end (delta: -25.1MB). Peak memory consumption was 6.5MB. Max. memory is 16.1GB. [2022-07-20 06:33:47,236 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 83.9MB. Free memory was 62.5MB in the beginning and 62.4MB in the end (delta: 21.2kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-20 06:33:47,237 INFO L158 Benchmark]: CACSL2BoogieTranslator took 412.38ms. Allocated memory was 83.9MB in the beginning and 100.7MB in the end (delta: 16.8MB). Free memory was 47.1MB in the beginning and 72.3MB in the end (delta: -25.3MB). Peak memory consumption was 6.5MB. Max. memory is 16.1GB. [2022-07-20 06:33:47,239 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 83.9MB. Free memory was 62.5MB in the beginning and 62.4MB in the end (delta: 21.2kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 412.38ms. Allocated memory was 83.9MB in the beginning and 100.7MB in the end (delta: 16.8MB). Free memory was 47.1MB in the beginning and 72.3MB in the end (delta: -25.3MB). Peak memory consumption was 6.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 1048]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/pthread-memsafety/list1.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 1da30149a66945688e686f90b0d1749d09e30bdcfdeae7b4325d99ddbe3a8206 --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-20 06:33:49,042 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-20 06:33:49,044 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-20 06:33:49,084 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-20 06:33:49,085 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-20 06:33:49,086 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-20 06:33:49,089 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-20 06:33:49,091 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-20 06:33:49,092 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-20 06:33:49,096 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-20 06:33:49,097 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-20 06:33:49,098 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-20 06:33:49,099 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-20 06:33:49,100 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-20 06:33:49,101 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-20 06:33:49,105 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-20 06:33:49,106 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-20 06:33:49,107 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-20 06:33:49,108 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-20 06:33:49,112 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-20 06:33:49,113 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-20 06:33:49,114 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-20 06:33:49,116 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-20 06:33:49,116 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-20 06:33:49,117 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-20 06:33:49,123 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-20 06:33:49,123 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-20 06:33:49,124 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-20 06:33:49,124 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-20 06:33:49,125 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-20 06:33:49,125 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-20 06:33:49,126 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-20 06:33:49,127 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-20 06:33:49,127 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-20 06:33:49,128 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-20 06:33:49,129 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-20 06:33:49,129 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-20 06:33:49,130 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-20 06:33:49,130 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-20 06:33:49,130 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-20 06:33:49,131 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-20 06:33:49,132 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-20 06:33:49,139 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2022-07-20 06:33:49,165 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-20 06:33:49,165 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-20 06:33:49,166 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-20 06:33:49,166 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-20 06:33:49,166 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-20 06:33:49,167 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-20 06:33:49,167 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-20 06:33:49,167 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-20 06:33:49,167 INFO L138 SettingsManager]: * Use SBE=true [2022-07-20 06:33:49,168 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-20 06:33:49,168 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-20 06:33:49,169 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-20 06:33:49,169 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-20 06:33:49,169 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-20 06:33:49,169 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-20 06:33:49,169 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-20 06:33:49,169 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-20 06:33:49,170 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-20 06:33:49,170 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-20 06:33:49,170 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-20 06:33:49,170 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-07-20 06:33:49,170 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-07-20 06:33:49,170 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-20 06:33:49,170 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-20 06:33:49,171 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-20 06:33:49,171 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-20 06:33:49,171 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-20 06:33:49,171 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-20 06:33:49,171 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-20 06:33:49,171 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-20 06:33:49,172 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-07-20 06:33:49,172 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-07-20 06:33:49,172 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-07-20 06:33:49,172 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1da30149a66945688e686f90b0d1749d09e30bdcfdeae7b4325d99ddbe3a8206 [2022-07-20 06:33:49,411 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-20 06:33:49,425 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-20 06:33:49,427 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-20 06:33:49,428 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-20 06:33:49,429 INFO L275 PluginConnector]: CDTParser initialized [2022-07-20 06:33:49,430 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread-memsafety/list1.i [2022-07-20 06:33:49,505 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/53e8d31ae/1806094d667f404586a9e21364479f41/FLAG8656f95ab [2022-07-20 06:33:50,059 INFO L306 CDTParser]: Found 1 translation units. [2022-07-20 06:33:50,072 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-memsafety/list1.i [2022-07-20 06:33:50,084 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/53e8d31ae/1806094d667f404586a9e21364479f41/FLAG8656f95ab [2022-07-20 06:33:50,514 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/53e8d31ae/1806094d667f404586a9e21364479f41 [2022-07-20 06:33:50,516 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-20 06:33:50,517 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-20 06:33:50,518 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-20 06:33:50,518 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-20 06:33:50,526 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-20 06:33:50,527 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 06:33:50" (1/1) ... [2022-07-20 06:33:50,528 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@66991644 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:33:50, skipping insertion in model container [2022-07-20 06:33:50,528 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 06:33:50" (1/1) ... [2022-07-20 06:33:50,533 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-20 06:33:50,596 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-20 06:33:50,974 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 06:33:50,983 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-07-20 06:33:50,991 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-20 06:33:51,018 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 06:33:51,032 INFO L203 MainTranslator]: Completed pre-run [2022-07-20 06:33:51,057 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 06:33:51,125 INFO L208 MainTranslator]: Completed translation [2022-07-20 06:33:51,125 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:33:51 WrapperNode [2022-07-20 06:33:51,125 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-20 06:33:51,126 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-20 06:33:51,126 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-20 06:33:51,127 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-20 06:33:51,131 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:33:51" (1/1) ... [2022-07-20 06:33:51,156 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:33:51" (1/1) ... [2022-07-20 06:33:51,180 INFO L137 Inliner]: procedures = 267, calls = 33, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 74 [2022-07-20 06:33:51,180 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-20 06:33:51,181 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-20 06:33:51,181 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-20 06:33:51,181 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-20 06:33:51,186 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:33:51" (1/1) ... [2022-07-20 06:33:51,187 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:33:51" (1/1) ... [2022-07-20 06:33:51,194 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:33:51" (1/1) ... [2022-07-20 06:33:51,194 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:33:51" (1/1) ... [2022-07-20 06:33:51,210 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:33:51" (1/1) ... [2022-07-20 06:33:51,219 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:33:51" (1/1) ... [2022-07-20 06:33:51,221 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:33:51" (1/1) ... [2022-07-20 06:33:51,228 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-20 06:33:51,232 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-20 06:33:51,232 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-20 06:33:51,232 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-20 06:33:51,233 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:33:51" (1/1) ... [2022-07-20 06:33:51,238 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-20 06:33:51,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 06:33:51,255 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) [2022-07-20 06:33:51,272 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 [2022-07-20 06:33:51,282 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-07-20 06:33:51,282 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-20 06:33:51,282 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-20 06:33:51,282 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-07-20 06:33:51,282 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-20 06:33:51,282 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-07-20 06:33:51,282 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-20 06:33:51,282 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-20 06:33:51,283 INFO L130 BoogieDeclarations]: Found specification of procedure delete [2022-07-20 06:33:51,283 INFO L138 BoogieDeclarations]: Found implementation of procedure delete [2022-07-20 06:33:51,283 INFO L130 BoogieDeclarations]: Found specification of procedure build [2022-07-20 06:33:51,283 INFO L138 BoogieDeclarations]: Found implementation of procedure build [2022-07-20 06:33:51,283 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-20 06:33:51,283 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-20 06:33:51,284 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-20 06:33:51,439 INFO L234 CfgBuilder]: Building ICFG [2022-07-20 06:33:51,441 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-20 06:33:51,750 INFO L275 CfgBuilder]: Performing block encoding [2022-07-20 06:33:51,755 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-20 06:33:51,757 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-20 06:33:51,758 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 06:33:51 BoogieIcfgContainer [2022-07-20 06:33:51,759 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-20 06:33:51,760 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-20 06:33:51,761 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-20 06:33:51,762 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-20 06:33:51,763 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 06:33:50" (1/3) ... [2022-07-20 06:33:51,763 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a18de1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 06:33:51, skipping insertion in model container [2022-07-20 06:33:51,763 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:33:51" (2/3) ... [2022-07-20 06:33:51,764 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a18de1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 06:33:51, skipping insertion in model container [2022-07-20 06:33:51,764 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 06:33:51" (3/3) ... [2022-07-20 06:33:51,764 INFO L111 eAbstractionObserver]: Analyzing ICFG list1.i [2022-07-20 06:33:51,773 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-20 06:33:51,774 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 38 error locations. [2022-07-20 06:33:51,774 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-20 06:33:51,849 INFO L135 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-07-20 06:33:51,875 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-07-20 06:33:51,883 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 152 places, 151 transitions, 318 flow [2022-07-20 06:33:51,885 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 152 places, 151 transitions, 318 flow [2022-07-20 06:33:51,886 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 152 places, 151 transitions, 318 flow [2022-07-20 06:33:51,958 INFO L129 PetriNetUnfolder]: 6/149 cut-off events. [2022-07-20 06:33:51,958 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-20 06:33:51,961 INFO L84 FinitePrefix]: Finished finitePrefix Result has 158 conditions, 149 events. 6/149 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 379 event pairs, 0 based on Foata normal form. 0/105 useless extension candidates. Maximal degree in co-relation 87. Up to 3 conditions per place. [2022-07-20 06:33:51,964 INFO L116 LiptonReduction]: Number of co-enabled transitions 960 [2022-07-20 06:34:09,588 INFO L131 LiptonReduction]: Checked pairs total: 1626 [2022-07-20 06:34:09,588 INFO L133 LiptonReduction]: Total number of compositions: 187 [2022-07-20 06:34:09,602 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 65 places, 62 transitions, 140 flow [2022-07-20 06:34:09,627 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 170 states, 74 states have (on average 4.04054054054054) internal successors, (299), 169 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:34:09,676 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-20 06:34:09,685 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=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, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@d3dbfde, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@3a91e887 [2022-07-20 06:34:09,685 INFO L358 AbstractCegarLoop]: Starting to check reachability of 69 error locations. [2022-07-20 06:34:09,688 INFO L276 IsEmpty]: Start isEmpty. Operand has 170 states, 74 states have (on average 4.04054054054054) internal successors, (299), 169 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:34:09,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2 [2022-07-20 06:34:09,691 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:34:09,692 INFO L195 NwaCegarLoop]: trace histogram [1] [2022-07-20 06:34:09,708 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [buildErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, buildErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, buildErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 66 more)] === [2022-07-20 06:34:09,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:34:09,716 INFO L85 PathProgramCache]: Analyzing trace with hash 636, now seen corresponding path program 1 times [2022-07-20 06:34:09,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 06:34:09,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2066905895] [2022-07-20 06:34:09,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:34:09,727 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 06:34:09,727 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 06:34:09,743 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) [2022-07-20 06:34:09,755 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-07-20 06:34:09,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:34:09,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 3 conjuncts, 1 conjunts are in the unsatisfiable core [2022-07-20 06:34:09,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 06:34:09,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:34:09,848 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 06:34:09,848 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 06:34:09,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2066905895] [2022-07-20 06:34:09,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2066905895] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 06:34:09,849 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 06:34:09,849 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2022-07-20 06:34:09,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149741347] [2022-07-20 06:34:09,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 06:34:09,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-20 06:34:09,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 06:34:09,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-20 06:34:09,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-20 06:34:09,872 INFO L87 Difference]: Start difference. First operand has 170 states, 74 states have (on average 4.04054054054054) internal successors, (299), 169 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 1 states have (on average 1.0) internal successors, (1), 1 states have internal predecessors, (1), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:34:10,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:34:10,001 INFO L93 Difference]: Finished difference Result 132 states and 230 transitions. [2022-07-20 06:34:10,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-20 06:34:10,003 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 1 states have (on average 1.0) internal successors, (1), 1 states have internal predecessors, (1), 0 states have call successors, (0), 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 1 [2022-07-20 06:34:10,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:34:10,009 INFO L225 Difference]: With dead ends: 132 [2022-07-20 06:34:10,010 INFO L226 Difference]: Without dead ends: 132 [2022-07-20 06:34:10,010 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 0 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-20 06:34:10,013 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 06:34:10,013 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 1 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 06:34:10,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-07-20 06:34:10,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2022-07-20 06:34:10,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 65 states have (on average 3.5384615384615383) internal successors, (230), 131 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:34:10,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 230 transitions. [2022-07-20 06:34:10,041 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 230 transitions. Word has length 1 [2022-07-20 06:34:10,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:34:10,041 INFO L495 AbstractCegarLoop]: Abstraction has 132 states and 230 transitions. [2022-07-20 06:34:10,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 1 states have (on average 1.0) internal successors, (1), 1 states have internal predecessors, (1), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:34:10,042 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 230 transitions. [2022-07-20 06:34:10,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-07-20 06:34:10,042 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:34:10,042 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-07-20 06:34:10,069 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-07-20 06:34:10,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 06:34:10,249 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [buildErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, buildErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, buildErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 66 more)] === [2022-07-20 06:34:10,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:34:10,250 INFO L85 PathProgramCache]: Analyzing trace with hash 623943, now seen corresponding path program 1 times [2022-07-20 06:34:10,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 06:34:10,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [528545696] [2022-07-20 06:34:10,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:34:10,251 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 06:34:10,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 06:34:10,252 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) [2022-07-20 06:34:10,254 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-07-20 06:34:10,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:34:10,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-20 06:34:10,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 06:34:10,375 INFO L356 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2022-07-20 06:34:10,376 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 22 [2022-07-20 06:34:10,388 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:34:10,388 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 06:34:10,388 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 06:34:10,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [528545696] [2022-07-20 06:34:10,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [528545696] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 06:34:10,389 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 06:34:10,389 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-07-20 06:34:10,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559913090] [2022-07-20 06:34:10,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 06:34:10,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 06:34:10,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 06:34:10,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 06:34:10,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 06:34:10,391 INFO L87 Difference]: Start difference. First operand 132 states and 230 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:34:10,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:34:10,534 INFO L93 Difference]: Finished difference Result 143 states and 246 transitions. [2022-07-20 06:34:10,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 06:34:10,535 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 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 3 [2022-07-20 06:34:10,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:34:10,536 INFO L225 Difference]: With dead ends: 143 [2022-07-20 06:34:10,536 INFO L226 Difference]: Without dead ends: 143 [2022-07-20 06:34:10,537 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 06:34:10,537 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 31 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 06:34:10,538 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 0 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 06:34:10,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-07-20 06:34:10,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 118. [2022-07-20 06:34:10,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 59 states have (on average 3.4237288135593222) internal successors, (202), 117 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:34:10,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 202 transitions. [2022-07-20 06:34:10,545 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 202 transitions. Word has length 3 [2022-07-20 06:34:10,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:34:10,546 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 202 transitions. [2022-07-20 06:34:10,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:34:10,546 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 202 transitions. [2022-07-20 06:34:10,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-07-20 06:34:10,546 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:34:10,547 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-07-20 06:34:10,556 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-07-20 06:34:10,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 06:34:10,756 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [buildErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, buildErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, buildErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 66 more)] === [2022-07-20 06:34:10,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:34:10,756 INFO L85 PathProgramCache]: Analyzing trace with hash 623944, now seen corresponding path program 1 times [2022-07-20 06:34:10,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 06:34:10,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1911948691] [2022-07-20 06:34:10,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:34:10,757 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 06:34:10,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 06:34:10,759 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) [2022-07-20 06:34:10,762 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-07-20 06:34:10,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:34:10,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-20 06:34:10,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 06:34:10,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:34:10,862 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-20 06:34:10,865 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2022-07-20 06:34:10,876 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:34:10,876 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 06:34:10,876 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 06:34:10,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1911948691] [2022-07-20 06:34:10,876 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1911948691] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 06:34:10,876 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 06:34:10,876 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-07-20 06:34:10,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181282300] [2022-07-20 06:34:10,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 06:34:10,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 06:34:10,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 06:34:10,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 06:34:10,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 06:34:10,878 INFO L87 Difference]: Start difference. First operand 118 states and 202 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:34:11,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:34:11,048 INFO L93 Difference]: Finished difference Result 119 states and 207 transitions. [2022-07-20 06:34:11,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 06:34:11,049 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 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 3 [2022-07-20 06:34:11,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:34:11,050 INFO L225 Difference]: With dead ends: 119 [2022-07-20 06:34:11,050 INFO L226 Difference]: Without dead ends: 119 [2022-07-20 06:34:11,050 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 06:34:11,051 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 1 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 06:34:11,051 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 1 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-20 06:34:11,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-07-20 06:34:11,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 118. [2022-07-20 06:34:11,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 59 states have (on average 3.457627118644068) internal successors, (204), 117 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:34:11,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 204 transitions. [2022-07-20 06:34:11,057 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 204 transitions. Word has length 3 [2022-07-20 06:34:11,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:34:11,058 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 204 transitions. [2022-07-20 06:34:11,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:34:11,058 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 204 transitions. [2022-07-20 06:34:11,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-07-20 06:34:11,058 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:34:11,058 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-07-20 06:34:11,065 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2022-07-20 06:34:11,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 06:34:11,259 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting buildErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [buildErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, buildErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, buildErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 66 more)] === [2022-07-20 06:34:11,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:34:11,260 INFO L85 PathProgramCache]: Analyzing trace with hash 19343058, now seen corresponding path program 1 times [2022-07-20 06:34:11,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 06:34:11,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [83253076] [2022-07-20 06:34:11,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:34:11,260 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 06:34:11,260 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 06:34:11,261 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) [2022-07-20 06:34:11,265 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-07-20 06:34:11,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:34:11,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-20 06:34:11,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 06:34:11,376 INFO L390 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 [2022-07-20 06:34:11,379 INFO L390 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 [2022-07-20 06:34:11,386 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:34:11,386 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 06:34:11,386 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 06:34:11,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [83253076] [2022-07-20 06:34:11,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [83253076] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 06:34:11,387 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 06:34:11,387 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-20 06:34:11,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309730032] [2022-07-20 06:34:11,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 06:34:11,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 06:34:11,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 06:34:11,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 06:34:11,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 06:34:11,388 INFO L87 Difference]: Start difference. First operand 118 states and 204 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:34:11,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:34:11,526 INFO L93 Difference]: Finished difference Result 137 states and 236 transitions. [2022-07-20 06:34:11,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 06:34:11,526 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 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 4 [2022-07-20 06:34:11,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:34:11,527 INFO L225 Difference]: With dead ends: 137 [2022-07-20 06:34:11,527 INFO L226 Difference]: Without dead ends: 137 [2022-07-20 06:34:11,528 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 06:34:11,528 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 31 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 06:34:11,528 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 0 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 06:34:11,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-07-20 06:34:11,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 112. [2022-07-20 06:34:11,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 57 states have (on average 3.3684210526315788) internal successors, (192), 111 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:34:11,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 192 transitions. [2022-07-20 06:34:11,533 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 192 transitions. Word has length 4 [2022-07-20 06:34:11,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:34:11,533 INFO L495 AbstractCegarLoop]: Abstraction has 112 states and 192 transitions. [2022-07-20 06:34:11,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:34:11,533 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 192 transitions. [2022-07-20 06:34:11,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-07-20 06:34:11,533 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:34:11,533 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-07-20 06:34:11,552 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-07-20 06:34:11,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 06:34:11,742 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [buildErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, buildErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, buildErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 66 more)] === [2022-07-20 06:34:11,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:34:11,742 INFO L85 PathProgramCache]: Analyzing trace with hash 599634247, now seen corresponding path program 1 times [2022-07-20 06:34:11,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 06:34:11,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [152134786] [2022-07-20 06:34:11,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:34:11,743 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 06:34:11,743 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 06:34:11,744 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) [2022-07-20 06:34:11,746 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-07-20 06:34:11,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:34:11,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-20 06:34:11,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 06:34:11,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:34:11,833 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-20 06:34:11,842 INFO L356 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2022-07-20 06:34:11,842 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 22 [2022-07-20 06:34:11,875 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-20 06:34:11,875 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-07-20 06:34:11,888 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-20 06:34:11,888 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 14 [2022-07-20 06:34:11,922 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-20 06:34:11,922 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-07-20 06:34:11,951 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:34:11,952 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 06:34:11,952 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 06:34:11,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [152134786] [2022-07-20 06:34:11,952 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [152134786] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 06:34:11,952 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 06:34:11,952 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 06:34:11,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823119199] [2022-07-20 06:34:11,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 06:34:11,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-20 06:34:11,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 06:34:11,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-20 06:34:11,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-20 06:34:11,954 INFO L87 Difference]: Start difference. First operand 112 states and 192 transitions. Second operand has 5 states, 4 states have (on average 1.25) internal successors, (5), 4 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) [2022-07-20 06:34:12,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:34:12,165 INFO L93 Difference]: Finished difference Result 116 states and 203 transitions. [2022-07-20 06:34:12,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-20 06:34:12,166 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.25) internal successors, (5), 4 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 [2022-07-20 06:34:12,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:34:12,167 INFO L225 Difference]: With dead ends: 116 [2022-07-20 06:34:12,167 INFO L226 Difference]: Without dead ends: 116 [2022-07-20 06:34:12,167 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-07-20 06:34:12,167 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 2 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 46 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 06:34:12,168 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 1 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 119 Invalid, 0 Unknown, 46 Unchecked, 0.2s Time] [2022-07-20 06:34:12,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-07-20 06:34:12,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 113. [2022-07-20 06:34:12,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 58 states have (on average 3.3793103448275863) internal successors, (196), 112 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:34:12,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 196 transitions. [2022-07-20 06:34:12,172 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 196 transitions. Word has length 5 [2022-07-20 06:34:12,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:34:12,173 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 196 transitions. [2022-07-20 06:34:12,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.25) internal successors, (5), 4 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) [2022-07-20 06:34:12,173 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 196 transitions. [2022-07-20 06:34:12,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-07-20 06:34:12,173 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:34:12,174 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-07-20 06:34:12,183 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-07-20 06:34:12,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 06:34:12,374 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting buildErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [buildErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, buildErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, buildErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 66 more)] === [2022-07-20 06:34:12,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:34:12,375 INFO L85 PathProgramCache]: Analyzing trace with hash 599634300, now seen corresponding path program 1 times [2022-07-20 06:34:12,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 06:34:12,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [750781621] [2022-07-20 06:34:12,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:34:12,375 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 06:34:12,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 06:34:12,377 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) [2022-07-20 06:34:12,379 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-07-20 06:34:12,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:34:12,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 21 conjunts are in the unsatisfiable core [2022-07-20 06:34:12,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 06:34:12,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:34:12,522 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 06:34:12,522 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 06:34:12,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [750781621] [2022-07-20 06:34:12,522 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [750781621] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 06:34:12,522 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 06:34:12,522 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 06:34:12,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430649735] [2022-07-20 06:34:12,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 06:34:12,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-20 06:34:12,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 06:34:12,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-20 06:34:12,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-20 06:34:12,523 INFO L87 Difference]: Start difference. First operand 113 states and 196 transitions. Second operand has 6 states, 5 states have (on average 1.0) internal successors, (5), 5 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) [2022-07-20 06:34:12,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:34:12,893 INFO L93 Difference]: Finished difference Result 130 states and 221 transitions. [2022-07-20 06:34:12,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-20 06:34:12,893 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.0) internal successors, (5), 5 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 [2022-07-20 06:34:12,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:34:12,894 INFO L225 Difference]: With dead ends: 130 [2022-07-20 06:34:12,894 INFO L226 Difference]: Without dead ends: 130 [2022-07-20 06:34:12,894 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2022-07-20 06:34:12,895 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 106 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-20 06:34:12,895 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 0 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-20 06:34:12,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-07-20 06:34:12,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 115. [2022-07-20 06:34:12,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 60 states have (on average 3.2666666666666666) internal successors, (196), 114 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:34:12,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 196 transitions. [2022-07-20 06:34:12,899 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 196 transitions. Word has length 5 [2022-07-20 06:34:12,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:34:12,899 INFO L495 AbstractCegarLoop]: Abstraction has 115 states and 196 transitions. [2022-07-20 06:34:12,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.0) internal successors, (5), 5 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) [2022-07-20 06:34:12,899 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 196 transitions. [2022-07-20 06:34:12,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-07-20 06:34:12,899 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:34:12,899 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-07-20 06:34:12,908 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-07-20 06:34:13,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 06:34:13,107 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [buildErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, buildErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, buildErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 66 more)] === [2022-07-20 06:34:13,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:34:13,107 INFO L85 PathProgramCache]: Analyzing trace with hash 1408792635, now seen corresponding path program 1 times [2022-07-20 06:34:13,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 06:34:13,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [641965889] [2022-07-20 06:34:13,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:34:13,108 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 06:34:13,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 06:34:13,109 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) [2022-07-20 06:34:13,111 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-07-20 06:34:13,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:34:13,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-20 06:34:13,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 06:34:13,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:34:13,209 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-20 06:34:13,212 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2022-07-20 06:34:13,241 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-20 06:34:13,241 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2022-07-20 06:34:13,286 INFO L356 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-07-20 06:34:13,286 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 30 [2022-07-20 06:34:13,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:34:13,348 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 06:34:13,348 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 06:34:13,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [641965889] [2022-07-20 06:34:13,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [641965889] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 06:34:13,349 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 06:34:13,349 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 06:34:13,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951046090] [2022-07-20 06:34:13,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 06:34:13,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-20 06:34:13,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 06:34:13,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-20 06:34:13,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-20 06:34:13,350 INFO L87 Difference]: Start difference. First operand 115 states and 196 transitions. Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 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) [2022-07-20 06:34:13,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:34:13,612 INFO L93 Difference]: Finished difference Result 118 states and 202 transitions. [2022-07-20 06:34:13,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-20 06:34:13,613 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 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 [2022-07-20 06:34:13,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:34:13,613 INFO L225 Difference]: With dead ends: 118 [2022-07-20 06:34:13,613 INFO L226 Difference]: Without dead ends: 118 [2022-07-20 06:34:13,613 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-20 06:34:13,614 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 2 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 46 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-20 06:34:13,614 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 1 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 119 Invalid, 0 Unknown, 46 Unchecked, 0.3s Time] [2022-07-20 06:34:13,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-07-20 06:34:13,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 116. [2022-07-20 06:34:13,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 61 states have (on average 3.262295081967213) internal successors, (199), 115 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:34:13,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 199 transitions. [2022-07-20 06:34:13,617 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 199 transitions. Word has length 6 [2022-07-20 06:34:13,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:34:13,618 INFO L495 AbstractCegarLoop]: Abstraction has 116 states and 199 transitions. [2022-07-20 06:34:13,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 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) [2022-07-20 06:34:13,618 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 199 transitions. [2022-07-20 06:34:13,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-07-20 06:34:13,618 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:34:13,618 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-07-20 06:34:13,641 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-07-20 06:34:13,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 06:34:13,840 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting buildErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [buildErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, buildErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, buildErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 66 more)] === [2022-07-20 06:34:13,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:34:13,841 INFO L85 PathProgramCache]: Analyzing trace with hash 1408792700, now seen corresponding path program 1 times [2022-07-20 06:34:13,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 06:34:13,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [143068269] [2022-07-20 06:34:13,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:34:13,842 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 06:34:13,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 06:34:13,843 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 06:34:13,844 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-07-20 06:34:13,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:34:13,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 27 conjunts are in the unsatisfiable core [2022-07-20 06:34:13,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 06:34:14,019 INFO L390 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 [2022-07-20 06:34:14,024 INFO L390 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 [2022-07-20 06:34:14,092 INFO L356 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-07-20 06:34:14,092 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 18 [2022-07-20 06:34:14,119 INFO L356 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-07-20 06:34:14,119 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 18 [2022-07-20 06:34:14,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:34:14,161 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 06:34:14,161 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 06:34:14,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [143068269] [2022-07-20 06:34:14,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [143068269] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 06:34:14,161 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 06:34:14,161 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-20 06:34:14,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176894514] [2022-07-20 06:34:14,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 06:34:14,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-20 06:34:14,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 06:34:14,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-20 06:34:14,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-20 06:34:14,162 INFO L87 Difference]: Start difference. First operand 116 states and 199 transitions. Second operand has 7 states, 6 states have (on average 1.0) internal successors, (6), 6 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) [2022-07-20 06:34:14,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:34:14,632 INFO L93 Difference]: Finished difference Result 129 states and 222 transitions. [2022-07-20 06:34:14,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-20 06:34:14,633 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.0) internal successors, (6), 6 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 [2022-07-20 06:34:14,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:34:14,634 INFO L225 Difference]: With dead ends: 129 [2022-07-20 06:34:14,634 INFO L226 Difference]: Without dead ends: 129 [2022-07-20 06:34:14,634 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2022-07-20 06:34:14,635 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 106 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-20 06:34:14,635 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 0 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-20 06:34:14,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-07-20 06:34:14,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 117. [2022-07-20 06:34:14,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 62 states have (on average 3.2096774193548385) internal successors, (199), 116 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:34:14,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 199 transitions. [2022-07-20 06:34:14,638 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 199 transitions. Word has length 6 [2022-07-20 06:34:14,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:34:14,638 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 199 transitions. [2022-07-20 06:34:14,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.0) internal successors, (6), 6 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) [2022-07-20 06:34:14,639 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 199 transitions. [2022-07-20 06:34:14,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-20 06:34:14,639 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:34:14,639 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:34:14,647 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-07-20 06:34:14,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 06:34:14,840 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting buildErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [buildErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, buildErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, buildErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 66 more)] === [2022-07-20 06:34:14,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:34:14,840 INFO L85 PathProgramCache]: Analyzing trace with hash 722900562, now seen corresponding path program 1 times [2022-07-20 06:34:14,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 06:34:14,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1580849110] [2022-07-20 06:34:14,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:34:14,840 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 06:34:14,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 06:34:14,843 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 06:34:14,844 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-07-20 06:34:14,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:34:14,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 21 conjunts are in the unsatisfiable core [2022-07-20 06:34:14,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 06:34:15,024 INFO L356 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-07-20 06:34:15,024 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 18 [2022-07-20 06:34:15,038 INFO L356 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-07-20 06:34:15,038 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 18 [2022-07-20 06:34:15,182 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 06:34:15,182 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2022-07-20 06:34:15,216 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-07-20 06:34:15,237 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-20 06:34:15,237 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 7 [2022-07-20 06:34:15,271 INFO L356 Elim1Store]: treesize reduction 38, result has 39.7 percent of original size [2022-07-20 06:34:15,271 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 28 treesize of output 45 [2022-07-20 06:34:15,280 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-20 06:34:15,280 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 7 [2022-07-20 06:34:15,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:34:15,302 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 06:34:15,302 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 06:34:15,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1580849110] [2022-07-20 06:34:15,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1580849110] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 06:34:15,303 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 06:34:15,303 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-20 06:34:15,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514015770] [2022-07-20 06:34:15,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 06:34:15,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-20 06:34:15,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 06:34:15,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-20 06:34:15,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-07-20 06:34:15,303 INFO L87 Difference]: Start difference. First operand 117 states and 199 transitions. Second operand has 8 states, 7 states have (on average 1.0) internal successors, (7), 7 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:34:15,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:34:15,715 INFO L93 Difference]: Finished difference Result 127 states and 214 transitions. [2022-07-20 06:34:15,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-20 06:34:15,716 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.0) internal successors, (7), 7 states have internal predecessors, (7), 0 states have call successors, (0), 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 7 [2022-07-20 06:34:15,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:34:15,717 INFO L225 Difference]: With dead ends: 127 [2022-07-20 06:34:15,717 INFO L226 Difference]: Without dead ends: 127 [2022-07-20 06:34:15,717 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2022-07-20 06:34:15,717 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 102 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-20 06:34:15,717 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 0 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 137 Invalid, 0 Unknown, 50 Unchecked, 0.3s Time] [2022-07-20 06:34:15,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-07-20 06:34:15,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 120. [2022-07-20 06:34:15,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 65 states have (on average 3.169230769230769) internal successors, (206), 119 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:34:15,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 206 transitions. [2022-07-20 06:34:15,721 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 206 transitions. Word has length 7 [2022-07-20 06:34:15,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:34:15,721 INFO L495 AbstractCegarLoop]: Abstraction has 120 states and 206 transitions. [2022-07-20 06:34:15,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.0) internal successors, (7), 7 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:34:15,721 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 206 transitions. [2022-07-20 06:34:15,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-20 06:34:15,721 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:34:15,721 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:34:15,739 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-07-20 06:34:15,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 06:34:15,927 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [buildErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, buildErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, buildErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 66 more)] === [2022-07-20 06:34:15,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:34:15,928 INFO L85 PathProgramCache]: Analyzing trace with hash 722900499, now seen corresponding path program 1 times [2022-07-20 06:34:15,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 06:34:15,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [287300806] [2022-07-20 06:34:15,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:34:15,928 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 06:34:15,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 06:34:15,930 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 06:34:15,931 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-07-20 06:34:16,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:34:16,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 33 conjunts are in the unsatisfiable core [2022-07-20 06:34:16,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 06:34:16,125 INFO L356 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2022-07-20 06:34:16,125 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 22 [2022-07-20 06:34:16,142 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-20 06:34:16,240 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-20 06:34:16,240 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 14 [2022-07-20 06:34:16,260 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-20 06:34:16,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:34:16,328 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-20 06:34:16,404 INFO L356 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-07-20 06:34:16,404 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 18 [2022-07-20 06:34:16,421 INFO L356 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-07-20 06:34:16,421 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 18 [2022-07-20 06:34:16,586 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-20 06:34:16,586 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 14 [2022-07-20 06:34:16,627 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-20 06:34:16,627 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 14 [2022-07-20 06:34:16,651 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-20 06:34:16,651 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 7 [2022-07-20 06:34:16,663 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-20 06:34:16,664 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 7 [2022-07-20 06:34:16,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:34:16,677 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-20 06:34:16,677 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 24 [2022-07-20 06:34:16,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:34:16,742 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 06:34:16,742 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 06:34:16,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [287300806] [2022-07-20 06:34:16,742 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [287300806] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 06:34:16,742 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 06:34:16,742 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-20 06:34:16,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001657140] [2022-07-20 06:34:16,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 06:34:16,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-20 06:34:16,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 06:34:16,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-20 06:34:16,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-20 06:34:16,743 INFO L87 Difference]: Start difference. First operand 120 states and 206 transitions. Second operand has 8 states, 7 states have (on average 1.0) internal successors, (7), 7 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:34:17,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:34:17,291 INFO L93 Difference]: Finished difference Result 122 states and 211 transitions. [2022-07-20 06:34:17,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-20 06:34:17,291 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.0) internal successors, (7), 7 states have internal predecessors, (7), 0 states have call successors, (0), 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 7 [2022-07-20 06:34:17,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:34:17,292 INFO L225 Difference]: With dead ends: 122 [2022-07-20 06:34:17,292 INFO L226 Difference]: Without dead ends: 122 [2022-07-20 06:34:17,292 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2022-07-20 06:34:17,293 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 6 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 90 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-20 06:34:17,293 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 0 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 203 Invalid, 0 Unknown, 90 Unchecked, 0.3s Time] [2022-07-20 06:34:17,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-07-20 06:34:17,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 120. [2022-07-20 06:34:17,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 65 states have (on average 3.1538461538461537) internal successors, (205), 119 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:34:17,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 205 transitions. [2022-07-20 06:34:17,296 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 205 transitions. Word has length 7 [2022-07-20 06:34:17,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:34:17,296 INFO L495 AbstractCegarLoop]: Abstraction has 120 states and 205 transitions. [2022-07-20 06:34:17,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.0) internal successors, (7), 7 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:34:17,296 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 205 transitions. [2022-07-20 06:34:17,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-20 06:34:17,296 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:34:17,296 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:34:17,306 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-07-20 06:34:17,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 06:34:17,497 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting buildErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [buildErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, buildErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, buildErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 66 more)] === [2022-07-20 06:34:17,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:34:17,497 INFO L85 PathProgramCache]: Analyzing trace with hash 722900563, now seen corresponding path program 1 times [2022-07-20 06:34:17,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 06:34:17,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1093597950] [2022-07-20 06:34:17,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:34:17,498 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 06:34:17,498 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 06:34:17,499 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 06:34:17,500 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-07-20 06:34:17,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:34:17,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-20 06:34:17,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 06:34:17,796 INFO L356 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-07-20 06:34:17,796 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 18 [2022-07-20 06:34:17,816 INFO L356 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-07-20 06:34:17,816 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 18 [2022-07-20 06:34:17,970 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-20 06:34:17,971 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 7 [2022-07-20 06:34:17,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:34:17,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:34:17,982 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-20 06:34:17,982 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 26 [2022-07-20 06:34:18,007 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-20 06:34:18,007 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 7 [2022-07-20 06:34:18,028 INFO L356 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2022-07-20 06:34:18,028 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 24 [2022-07-20 06:34:18,078 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:34:18,078 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 06:34:18,078 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 06:34:18,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1093597950] [2022-07-20 06:34:18,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1093597950] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 06:34:18,079 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 06:34:18,079 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-20 06:34:18,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862919171] [2022-07-20 06:34:18,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 06:34:18,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-20 06:34:18,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 06:34:18,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-20 06:34:18,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-07-20 06:34:18,080 INFO L87 Difference]: Start difference. First operand 120 states and 205 transitions. Second operand has 8 states, 7 states have (on average 1.0) internal successors, (7), 7 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:34:18,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:34:18,503 INFO L93 Difference]: Finished difference Result 204 states and 349 transitions. [2022-07-20 06:34:18,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-20 06:34:18,503 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.0) internal successors, (7), 7 states have internal predecessors, (7), 0 states have call successors, (0), 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 7 [2022-07-20 06:34:18,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:34:18,505 INFO L225 Difference]: With dead ends: 204 [2022-07-20 06:34:18,505 INFO L226 Difference]: Without dead ends: 204 [2022-07-20 06:34:18,505 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2022-07-20 06:34:18,506 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 186 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-20 06:34:18,506 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [186 Valid, 0 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-20 06:34:18,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2022-07-20 06:34:18,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 119. [2022-07-20 06:34:18,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 64 states have (on average 3.15625) internal successors, (202), 118 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:34:18,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 202 transitions. [2022-07-20 06:34:18,515 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 202 transitions. Word has length 7 [2022-07-20 06:34:18,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:34:18,515 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 202 transitions. [2022-07-20 06:34:18,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.0) internal successors, (7), 7 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:34:18,515 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 202 transitions. [2022-07-20 06:34:18,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-07-20 06:34:18,516 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:34:18,516 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:34:18,534 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-07-20 06:34:18,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 06:34:18,735 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [buildErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, buildErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, buildErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 66 more)] === [2022-07-20 06:34:18,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:34:18,735 INFO L85 PathProgramCache]: Analyzing trace with hash 935074129, now seen corresponding path program 1 times [2022-07-20 06:34:18,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 06:34:18,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2063285757] [2022-07-20 06:34:18,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:34:18,736 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 06:34:18,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 06:34:18,737 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 06:34:18,738 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-07-20 06:34:18,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:34:18,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 35 conjunts are in the unsatisfiable core [2022-07-20 06:34:18,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 06:34:18,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:34:18,889 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-20 06:34:18,898 INFO L356 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2022-07-20 06:34:18,898 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 22 [2022-07-20 06:34:18,964 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-20 06:34:18,964 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-07-20 06:34:18,975 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-20 06:34:18,975 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 14 [2022-07-20 06:34:19,018 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-20 06:34:19,018 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-07-20 06:34:19,073 INFO L356 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-07-20 06:34:19,074 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 18 [2022-07-20 06:34:19,088 INFO L356 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-07-20 06:34:19,089 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 18 [2022-07-20 06:34:19,228 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-20 06:34:19,228 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 14 [2022-07-20 06:34:19,254 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-20 06:34:19,254 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 14 [2022-07-20 06:34:19,287 INFO L356 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2022-07-20 06:34:19,287 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 32 [2022-07-20 06:34:19,331 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-20 06:34:19,331 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 7 [2022-07-20 06:34:19,338 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-20 06:34:19,338 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 7 [2022-07-20 06:34:19,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:34:19,537 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 06:34:19,537 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 06:34:19,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2063285757] [2022-07-20 06:34:19,537 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2063285757] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 06:34:19,537 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 06:34:19,537 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-20 06:34:19,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281865253] [2022-07-20 06:34:19,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 06:34:19,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-20 06:34:19,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 06:34:19,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-20 06:34:19,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-07-20 06:34:19,538 INFO L87 Difference]: Start difference. First operand 119 states and 202 transitions. Second operand has 9 states, 8 states have (on average 1.0) internal successors, (8), 8 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:34:20,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:34:20,040 INFO L93 Difference]: Finished difference Result 123 states and 209 transitions. [2022-07-20 06:34:20,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-20 06:34:20,041 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.0) internal successors, (8), 8 states have internal predecessors, (8), 0 states have call successors, (0), 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 8 [2022-07-20 06:34:20,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:34:20,043 INFO L225 Difference]: With dead ends: 123 [2022-07-20 06:34:20,043 INFO L226 Difference]: Without dead ends: 123 [2022-07-20 06:34:20,043 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2022-07-20 06:34:20,044 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 5 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 132 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-20 06:34:20,045 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 0 Invalid, 338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 197 Invalid, 0 Unknown, 132 Unchecked, 0.3s Time] [2022-07-20 06:34:20,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2022-07-20 06:34:20,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 120. [2022-07-20 06:34:20,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 65 states have (on average 3.1538461538461537) internal successors, (205), 119 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:34:20,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 205 transitions. [2022-07-20 06:34:20,051 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 205 transitions. Word has length 8 [2022-07-20 06:34:20,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:34:20,051 INFO L495 AbstractCegarLoop]: Abstraction has 120 states and 205 transitions. [2022-07-20 06:34:20,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.0) internal successors, (8), 8 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:34:20,051 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 205 transitions. [2022-07-20 06:34:20,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-20 06:34:20,052 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:34:20,052 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:34:20,060 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Ended with exit code 0 [2022-07-20 06:34:20,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 06:34:20,260 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [buildErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, buildErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, buildErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 66 more)] === [2022-07-20 06:34:20,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:34:20,261 INFO L85 PathProgramCache]: Analyzing trace with hash -1077471237, now seen corresponding path program 1 times [2022-07-20 06:34:20,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 06:34:20,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [587049912] [2022-07-20 06:34:20,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:34:20,261 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 06:34:20,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 06:34:20,262 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 06:34:20,264 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-07-20 06:34:20,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:34:20,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 35 conjunts are in the unsatisfiable core [2022-07-20 06:34:20,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 06:34:20,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:34:20,473 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-20 06:34:20,475 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2022-07-20 06:34:20,508 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-20 06:34:20,508 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-07-20 06:34:20,537 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-20 06:34:20,537 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2022-07-20 06:34:20,548 INFO L390 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 [2022-07-20 06:34:20,595 INFO L356 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-07-20 06:34:20,595 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 18 [2022-07-20 06:34:20,611 INFO L356 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-07-20 06:34:20,611 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 18 [2022-07-20 06:34:20,688 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-20 06:34:20,689 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 7 [2022-07-20 06:34:20,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:34:20,717 INFO L356 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2022-07-20 06:34:20,717 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 38 [2022-07-20 06:34:20,729 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-20 06:34:20,729 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 17 [2022-07-20 06:34:20,740 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-20 06:34:20,741 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 7 [2022-07-20 06:34:21,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:34:21,982 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 06:34:21,982 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 06:34:21,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [587049912] [2022-07-20 06:34:21,983 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [587049912] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 06:34:21,983 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 06:34:21,983 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-20 06:34:21,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245984271] [2022-07-20 06:34:21,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 06:34:21,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-20 06:34:21,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 06:34:21,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-20 06:34:21,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-07-20 06:34:21,984 INFO L87 Difference]: Start difference. First operand 120 states and 205 transitions. Second operand has 10 states, 9 states have (on average 1.0) internal successors, (9), 9 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:34:22,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:34:22,447 INFO L93 Difference]: Finished difference Result 124 states and 211 transitions. [2022-07-20 06:34:22,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-20 06:34:22,447 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.0) internal successors, (9), 9 states have internal predecessors, (9), 0 states have call successors, (0), 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 9 [2022-07-20 06:34:22,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:34:22,448 INFO L225 Difference]: With dead ends: 124 [2022-07-20 06:34:22,448 INFO L226 Difference]: Without dead ends: 124 [2022-07-20 06:34:22,448 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-07-20 06:34:22,449 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 6 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 98 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-20 06:34:22,449 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 0 Invalid, 351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 250 Invalid, 0 Unknown, 98 Unchecked, 0.4s Time] [2022-07-20 06:34:22,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-07-20 06:34:22,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 121. [2022-07-20 06:34:22,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 66 states have (on average 3.1363636363636362) internal successors, (207), 120 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:34:22,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 207 transitions. [2022-07-20 06:34:22,452 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 207 transitions. Word has length 9 [2022-07-20 06:34:22,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:34:22,452 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 207 transitions. [2022-07-20 06:34:22,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.0) internal successors, (9), 9 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:34:22,452 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 207 transitions. [2022-07-20 06:34:22,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-20 06:34:22,452 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:34:22,452 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:34:22,461 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-07-20 06:34:22,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 06:34:22,653 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [buildErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, buildErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, buildErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 66 more)] === [2022-07-20 06:34:22,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:34:22,653 INFO L85 PathProgramCache]: Analyzing trace with hash -1077471268, now seen corresponding path program 1 times [2022-07-20 06:34:22,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 06:34:22,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1688362283] [2022-07-20 06:34:22,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:34:22,654 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 06:34:22,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 06:34:22,655 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 06:34:22,656 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-07-20 06:34:22,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:34:22,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 35 conjunts are in the unsatisfiable core [2022-07-20 06:34:22,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 06:34:22,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:34:22,853 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-20 06:34:22,856 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2022-07-20 06:34:22,904 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-20 06:34:22,904 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-07-20 06:34:22,944 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-20 06:34:22,945 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2022-07-20 06:34:23,000 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-07-20 06:34:23,000 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 18 [2022-07-20 06:34:23,027 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-07-20 06:34:23,027 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 18 [2022-07-20 06:34:23,143 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-20 06:34:23,144 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 14 [2022-07-20 06:34:23,171 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-20 06:34:23,172 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 14 [2022-07-20 06:34:23,201 INFO L356 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2022-07-20 06:34:23,202 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 35 [2022-07-20 06:34:23,266 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-20 06:34:23,266 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 7 [2022-07-20 06:34:23,274 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-20 06:34:23,275 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 7 [2022-07-20 06:34:23,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:34:23,651 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 06:34:23,651 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 06:34:23,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1688362283] [2022-07-20 06:34:23,651 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1688362283] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 06:34:23,651 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 06:34:23,651 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-20 06:34:23,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237790678] [2022-07-20 06:34:23,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 06:34:23,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-20 06:34:23,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 06:34:23,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-20 06:34:23,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-07-20 06:34:23,652 INFO L87 Difference]: Start difference. First operand 121 states and 207 transitions. Second operand has 10 states, 9 states have (on average 1.0) internal successors, (9), 9 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:34:23,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:34:23,994 INFO L93 Difference]: Finished difference Result 125 states and 212 transitions. [2022-07-20 06:34:23,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-20 06:34:23,995 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.0) internal successors, (9), 9 states have internal predecessors, (9), 0 states have call successors, (0), 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 9 [2022-07-20 06:34:23,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:34:23,996 INFO L225 Difference]: With dead ends: 125 [2022-07-20 06:34:23,996 INFO L226 Difference]: Without dead ends: 125 [2022-07-20 06:34:23,996 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2022-07-20 06:34:23,996 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 6 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 139 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-20 06:34:23,997 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 0 Invalid, 346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 204 Invalid, 0 Unknown, 139 Unchecked, 0.3s Time] [2022-07-20 06:34:23,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-07-20 06:34:23,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 122. [2022-07-20 06:34:23,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 67 states have (on average 3.1044776119402986) internal successors, (208), 121 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:34:23,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 208 transitions. [2022-07-20 06:34:23,999 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 208 transitions. Word has length 9 [2022-07-20 06:34:24,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:34:24,000 INFO L495 AbstractCegarLoop]: Abstraction has 122 states and 208 transitions. [2022-07-20 06:34:24,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.0) internal successors, (9), 9 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:34:24,000 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 208 transitions. [2022-07-20 06:34:24,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-07-20 06:34:24,001 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:34:24,001 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:34:24,011 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2022-07-20 06:34:24,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 06:34:24,212 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [buildErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, buildErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, buildErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 66 more)] === [2022-07-20 06:34:24,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:34:24,213 INFO L85 PathProgramCache]: Analyzing trace with hash 958130803, now seen corresponding path program 2 times [2022-07-20 06:34:24,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 06:34:24,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1740196010] [2022-07-20 06:34:24,214 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 06:34:24,214 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 06:34:24,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 06:34:24,216 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 06:34:24,220 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-07-20 06:34:24,430 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 06:34:24,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 06:34:24,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 36 conjunts are in the unsatisfiable core [2022-07-20 06:34:24,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 06:34:24,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:34:24,449 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-20 06:34:24,460 INFO L356 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2022-07-20 06:34:24,460 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 22 [2022-07-20 06:34:24,519 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-20 06:34:24,519 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 14 [2022-07-20 06:34:24,527 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-20 06:34:24,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:34:24,563 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-20 06:34:24,626 INFO L356 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-07-20 06:34:24,626 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 18 [2022-07-20 06:34:24,643 INFO L356 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-07-20 06:34:24,643 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 18 [2022-07-20 06:34:24,786 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-20 06:34:24,786 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 14 [2022-07-20 06:34:24,830 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-20 06:34:24,830 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 14 [2022-07-20 06:34:24,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:34:24,853 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-20 06:34:24,853 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 24 [2022-07-20 06:34:24,866 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-20 06:34:24,866 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 7 [2022-07-20 06:34:24,876 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-20 06:34:24,876 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 7 [2022-07-20 06:34:25,438 INFO L356 Elim1Store]: treesize reduction 20, result has 57.4 percent of original size [2022-07-20 06:34:25,438 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 40 [2022-07-20 06:34:26,457 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:34:26,457 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 06:34:26,680 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-20 06:34:26,680 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 16 [2022-07-20 06:34:26,727 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-07-20 06:34:26,728 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2022-07-20 06:34:30,045 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 158 treesize of output 142 [2022-07-20 06:34:30,049 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 150 treesize of output 126 [2022-07-20 06:34:39,764 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:34:39,764 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 06:34:39,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1740196010] [2022-07-20 06:34:39,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1740196010] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 06:34:39,765 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 06:34:39,765 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2022-07-20 06:34:39,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806423081] [2022-07-20 06:34:39,765 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 06:34:39,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-20 06:34:39,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 06:34:39,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-20 06:34:39,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2022-07-20 06:34:39,766 INFO L87 Difference]: Start difference. First operand 122 states and 208 transitions. Second operand has 16 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 15 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:34:39,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:34:39,945 INFO L93 Difference]: Finished difference Result 139 states and 232 transitions. [2022-07-20 06:34:39,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-20 06:34:39,945 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 15 states have internal predecessors, (20), 0 states have call successors, (0), 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 10 [2022-07-20 06:34:39,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:34:39,946 INFO L225 Difference]: With dead ends: 139 [2022-07-20 06:34:39,946 INFO L226 Difference]: Without dead ends: 139 [2022-07-20 06:34:39,946 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2022-07-20 06:34:39,946 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 21 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 284 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 06:34:39,947 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 0 Invalid, 335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 50 Invalid, 0 Unknown, 284 Unchecked, 0.1s Time] [2022-07-20 06:34:39,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2022-07-20 06:34:39,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 123. [2022-07-20 06:34:39,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 68 states have (on average 3.1176470588235294) internal successors, (212), 122 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:34:39,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 212 transitions. [2022-07-20 06:34:39,949 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 212 transitions. Word has length 10 [2022-07-20 06:34:39,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:34:39,949 INFO L495 AbstractCegarLoop]: Abstraction has 123 states and 212 transitions. [2022-07-20 06:34:39,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 15 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:34:39,949 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 212 transitions. [2022-07-20 06:34:39,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-07-20 06:34:39,950 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:34:39,950 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:34:39,969 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-07-20 06:34:40,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 06:34:40,151 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting buildErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [buildErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, buildErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, buildErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 66 more)] === [2022-07-20 06:34:40,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:34:40,151 INFO L85 PathProgramCache]: Analyzing trace with hash 958130856, now seen corresponding path program 1 times [2022-07-20 06:34:40,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 06:34:40,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1848901977] [2022-07-20 06:34:40,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:34:40,152 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 06:34:40,152 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 06:34:40,153 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 06:34:40,155 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-07-20 06:34:40,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:34:40,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 48 conjunts are in the unsatisfiable core [2022-07-20 06:34:40,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 06:34:40,362 INFO L390 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 [2022-07-20 06:34:40,368 INFO L390 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 [2022-07-20 06:34:40,409 INFO L356 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-07-20 06:34:40,409 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 18 [2022-07-20 06:34:40,431 INFO L356 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-07-20 06:34:40,431 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 18 [2022-07-20 06:34:40,497 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-20 06:34:40,498 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 7 [2022-07-20 06:34:40,511 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-20 06:34:40,512 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 7 [2022-07-20 06:34:40,534 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-20 06:34:40,534 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 30 [2022-07-20 06:34:40,538 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 19 [2022-07-20 06:34:40,576 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-20 06:34:40,582 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-20 06:34:40,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:34:40,601 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-07-20 06:34:40,608 INFO L356 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2022-07-20 06:34:40,608 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 17 [2022-07-20 06:34:40,625 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:34:40,625 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 06:34:40,777 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 32 [2022-07-20 06:34:40,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:34:40,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:34:40,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:34:40,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:34:41,106 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 32 [2022-07-20 06:34:41,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:34:41,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:34:41,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:34:41,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:34:41,302 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 32 [2022-07-20 06:34:41,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:34:41,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:34:41,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:34:41,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:34:48,158 WARN L233 SmtUtils]: Spent 6.17s on a formula simplification that was a NOOP. DAG size: 90 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-20 06:34:55,869 WARN L233 SmtUtils]: Spent 6.20s on a formula simplification that was a NOOP. DAG size: 90 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-20 06:34:55,902 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 06:34:55,919 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:34:55,919 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 06:34:55,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1848901977] [2022-07-20 06:34:55,920 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1848901977] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 06:34:55,920 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 06:34:55,920 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 15 [2022-07-20 06:34:55,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795402883] [2022-07-20 06:34:55,920 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 06:34:55,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-20 06:34:55,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 06:34:55,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-20 06:34:55,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=182, Unknown=9, NotChecked=0, Total=240 [2022-07-20 06:34:55,922 INFO L87 Difference]: Start difference. First operand 123 states and 212 transitions. Second operand has 16 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 16 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:35:02,445 WARN L233 SmtUtils]: Spent 6.22s on a formula simplification that was a NOOP. DAG size: 98 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-20 06:35:02,846 WARN L833 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_636 (_ BitVec 32)) (|v_buildThread1of1ForFork1_append_#t~malloc2#1.base_116| (_ BitVec 32))) (or (not (= (select |c_#valid| |v_buildThread1of1ForFork1_append_#t~malloc2#1.base_116|) (_ bv0 1))) (let ((.cse0 (select (select |c_#memory_$Pointer$.offset| |c_buildThread1of1ForFork1_~#list~0#1.base|) |c_buildThread1of1ForFork1_~#list~0#1.offset|))) (let ((.cse1 (bvadd .cse0 (_ bv8 32)))) (and (bvule (bvadd .cse0 (_ bv4 32)) .cse1) (bvule .cse1 (select (store |c_#length| |v_buildThread1of1ForFork1_append_#t~malloc2#1.base_116| v_ArrVal_636) (select (select |c_#memory_$Pointer$.base| |c_buildThread1of1ForFork1_~#list~0#1.base|) |c_buildThread1of1ForFork1_~#list~0#1.offset|)))))))) (forall ((|#memory_$Pointer$.offset| (Array (_ BitVec 32) (Array (_ BitVec 32) (_ BitVec 32)))) (|#memory_$Pointer$.base| (Array (_ BitVec 32) (Array (_ BitVec 32) (_ BitVec 32)))) (|v_buildThread1of1ForFork1_append_#t~malloc2#1.base_116| (_ BitVec 32))) (or (not (= (select |c_#valid| |v_buildThread1of1ForFork1_append_#t~malloc2#1.base_116|) (_ bv0 1))) (and (let ((.cse2 (select (select (store |#memory_$Pointer$.offset| |c_buildThread1of1ForFork1_append_~plist#1.base| (store (select |#memory_$Pointer$.offset| |c_buildThread1of1ForFork1_append_~plist#1.base|) |c_buildThread1of1ForFork1_append_~plist#1.offset| |c_buildThread1of1ForFork1_append_~elem~0#1.offset|)) |c_buildThread1of1ForFork1_~#list~0#1.base|) |c_buildThread1of1ForFork1_~#list~0#1.offset|))) (bvule (bvadd (_ bv4 32) .cse2) (bvadd (_ bv8 32) .cse2))) (forall ((v_ArrVal_636 (_ BitVec 32))) (bvule (bvadd (_ bv8 32) (select (select (store |#memory_$Pointer$.offset| |c_buildThread1of1ForFork1_append_~plist#1.base| (store (select |#memory_$Pointer$.offset| |c_buildThread1of1ForFork1_append_~plist#1.base|) |c_buildThread1of1ForFork1_append_~plist#1.offset| |c_buildThread1of1ForFork1_append_~elem~0#1.offset|)) |c_buildThread1of1ForFork1_~#list~0#1.base|) |c_buildThread1of1ForFork1_~#list~0#1.offset|)) (select (store |c_#length| |v_buildThread1of1ForFork1_append_#t~malloc2#1.base_116| v_ArrVal_636) (select (select (store |#memory_$Pointer$.base| |c_buildThread1of1ForFork1_append_~plist#1.base| (store (select |#memory_$Pointer$.base| |c_buildThread1of1ForFork1_append_~plist#1.base|) |c_buildThread1of1ForFork1_append_~plist#1.offset| |c_buildThread1of1ForFork1_append_~elem~0#1.base|)) |c_buildThread1of1ForFork1_~#list~0#1.base|) |c_buildThread1of1ForFork1_~#list~0#1.offset|)))))))) is different from false [2022-07-20 06:35:09,337 WARN L233 SmtUtils]: Spent 6.37s on a formula simplification. DAG size of input: 109 DAG size of output: 101 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-20 06:35:21,796 WARN L233 SmtUtils]: Spent 12.30s on a formula simplification. DAG size of input: 90 DAG size of output: 88 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-20 06:35:22,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:35:22,084 INFO L93 Difference]: Finished difference Result 224 states and 379 transitions. [2022-07-20 06:35:22,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-20 06:35:22,084 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 16 states have internal predecessors, (20), 0 states have call successors, (0), 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 10 [2022-07-20 06:35:22,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:35:22,085 INFO L225 Difference]: With dead ends: 224 [2022-07-20 06:35:22,085 INFO L226 Difference]: Without dead ends: 224 [2022-07-20 06:35:22,085 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 39.8s TimeCoverageRelationStatistics Valid=144, Invalid=450, Unknown=10, NotChecked=46, Total=650 [2022-07-20 06:35:22,086 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 106 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 530 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 263 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-20 06:35:22,086 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 2 Invalid, 530 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 252 Invalid, 0 Unknown, 263 Unchecked, 0.5s Time] [2022-07-20 06:35:22,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2022-07-20 06:35:22,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 137. [2022-07-20 06:35:22,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 82 states have (on average 2.8780487804878048) internal successors, (236), 136 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:35:22,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 236 transitions. [2022-07-20 06:35:22,089 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 236 transitions. Word has length 10 [2022-07-20 06:35:22,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:35:22,089 INFO L495 AbstractCegarLoop]: Abstraction has 137 states and 236 transitions. [2022-07-20 06:35:22,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 16 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:35:22,089 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 236 transitions. [2022-07-20 06:35:22,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-07-20 06:35:22,090 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:35:22,090 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:35:22,109 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-07-20 06:35:22,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 06:35:22,298 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting buildErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [buildErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, buildErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, buildErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 66 more)] === [2022-07-20 06:35:22,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:35:22,299 INFO L85 PathProgramCache]: Analyzing trace with hash 958130857, now seen corresponding path program 1 times [2022-07-20 06:35:22,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 06:35:22,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [961052243] [2022-07-20 06:35:22,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:35:22,300 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 06:35:22,300 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 06:35:22,301 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 06:35:22,302 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-07-20 06:35:22,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:35:22,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 21 conjunts are in the unsatisfiable core [2022-07-20 06:35:22,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 06:35:22,495 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-20 06:35:22,511 INFO L356 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2022-07-20 06:35:22,512 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 21 [2022-07-20 06:35:22,524 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:35:22,524 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 06:35:22,558 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-07-20 06:35:22,625 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-07-20 06:35:22,626 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 26 [2022-07-20 06:35:22,639 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:35:22,639 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 06:35:22,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [961052243] [2022-07-20 06:35:22,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [961052243] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 06:35:22,639 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 06:35:22,639 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2022-07-20 06:35:22,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552586316] [2022-07-20 06:35:22,639 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 06:35:22,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-20 06:35:22,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 06:35:22,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-20 06:35:22,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-07-20 06:35:22,640 INFO L87 Difference]: Start difference. First operand 137 states and 236 transitions. Second operand has 8 states, 7 states have (on average 2.0) internal successors, (14), 8 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:35:23,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:35:23,136 INFO L93 Difference]: Finished difference Result 159 states and 270 transitions. [2022-07-20 06:35:23,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-20 06:35:23,137 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 8 states have internal predecessors, (14), 0 states have call successors, (0), 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 10 [2022-07-20 06:35:23,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:35:23,138 INFO L225 Difference]: With dead ends: 159 [2022-07-20 06:35:23,138 INFO L226 Difference]: Without dead ends: 159 [2022-07-20 06:35:23,138 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-07-20 06:35:23,138 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 54 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 22 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-20 06:35:23,138 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 0 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 145 Invalid, 0 Unknown, 22 Unchecked, 0.5s Time] [2022-07-20 06:35:23,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2022-07-20 06:35:23,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 134. [2022-07-20 06:35:23,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 81 states have (on average 2.7901234567901234) internal successors, (226), 133 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:35:23,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 226 transitions. [2022-07-20 06:35:23,141 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 226 transitions. Word has length 10 [2022-07-20 06:35:23,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:35:23,141 INFO L495 AbstractCegarLoop]: Abstraction has 134 states and 226 transitions. [2022-07-20 06:35:23,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 8 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:35:23,141 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 226 transitions. [2022-07-20 06:35:23,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-20 06:35:23,142 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:35:23,142 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:35:23,152 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-07-20 06:35:23,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 06:35:23,354 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [buildErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, buildErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, buildErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 66 more)] === [2022-07-20 06:35:23,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:35:23,354 INFO L85 PathProgramCache]: Analyzing trace with hash -578018175, now seen corresponding path program 1 times [2022-07-20 06:35:23,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 06:35:23,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1779542595] [2022-07-20 06:35:23,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:35:23,355 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 06:35:23,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 06:35:23,356 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 06:35:23,357 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-07-20 06:35:23,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:35:23,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 33 conjunts are in the unsatisfiable core [2022-07-20 06:35:23,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 06:35:23,549 INFO L356 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2022-07-20 06:35:23,549 INFO L390 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 1 case distinctions, treesize of input 9 treesize of output 18 [2022-07-20 06:35:23,563 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-20 06:35:23,563 INFO L390 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 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-20 06:35:23,618 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-20 06:35:23,618 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-07-20 06:35:23,630 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-20 06:35:23,630 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-07-20 06:35:23,670 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-20 06:35:23,671 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-07-20 06:35:23,682 INFO L390 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 [2022-07-20 06:35:23,756 INFO L356 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-07-20 06:35:23,757 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 18 [2022-07-20 06:35:23,777 INFO L356 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-07-20 06:35:23,777 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 18 [2022-07-20 06:35:23,956 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-20 06:35:23,957 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 7 [2022-07-20 06:35:23,970 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-20 06:35:23,970 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 7 [2022-07-20 06:35:23,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:35:23,990 INFO L356 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2022-07-20 06:35:23,991 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 35 [2022-07-20 06:35:24,004 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-20 06:35:24,005 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 12 [2022-07-20 06:35:24,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:35:24,232 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 06:35:24,233 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 06:35:24,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1779542595] [2022-07-20 06:35:24,233 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1779542595] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 06:35:24,233 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 06:35:24,233 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-20 06:35:24,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809016635] [2022-07-20 06:35:24,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 06:35:24,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-20 06:35:24,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 06:35:24,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-20 06:35:24,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-20 06:35:24,234 INFO L87 Difference]: Start difference. First operand 134 states and 226 transitions. Second operand has 8 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 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) [2022-07-20 06:35:25,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:35:25,055 INFO L93 Difference]: Finished difference Result 138 states and 233 transitions. [2022-07-20 06:35:25,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-20 06:35:25,056 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 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 [2022-07-20 06:35:25,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:35:25,056 INFO L225 Difference]: With dead ends: 138 [2022-07-20 06:35:25,057 INFO L226 Difference]: Without dead ends: 138 [2022-07-20 06:35:25,057 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2022-07-20 06:35:25,057 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 6 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 91 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-20 06:35:25,057 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 0 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 183 Invalid, 0 Unknown, 91 Unchecked, 0.4s Time] [2022-07-20 06:35:25,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2022-07-20 06:35:25,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 138. [2022-07-20 06:35:25,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 85 states have (on average 2.7411764705882353) internal successors, (233), 137 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:35:25,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 233 transitions. [2022-07-20 06:35:25,060 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 233 transitions. Word has length 11 [2022-07-20 06:35:25,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:35:25,060 INFO L495 AbstractCegarLoop]: Abstraction has 138 states and 233 transitions. [2022-07-20 06:35:25,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 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) [2022-07-20 06:35:25,061 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 233 transitions. [2022-07-20 06:35:25,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-20 06:35:25,061 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:35:25,061 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:35:25,072 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Ended with exit code 0 [2022-07-20 06:35:25,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 06:35:25,262 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [buildErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, buildErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, buildErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 66 more)] === [2022-07-20 06:35:25,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:35:25,262 INFO L85 PathProgramCache]: Analyzing trace with hash -578018174, now seen corresponding path program 1 times [2022-07-20 06:35:25,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 06:35:25,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [336074529] [2022-07-20 06:35:25,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:35:25,262 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 06:35:25,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 06:35:25,264 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 06:35:25,281 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-07-20 06:35:25,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:35:25,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 28 conjunts are in the unsatisfiable core [2022-07-20 06:35:25,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 06:35:25,436 INFO L356 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2022-07-20 06:35:25,436 INFO L390 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 1 case distinctions, treesize of input 9 treesize of output 18 [2022-07-20 06:35:25,476 INFO L356 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2022-07-20 06:35:25,477 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 21 [2022-07-20 06:35:25,512 INFO L356 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2022-07-20 06:35:25,512 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 27 [2022-07-20 06:35:25,592 INFO L356 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-07-20 06:35:25,593 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 18 [2022-07-20 06:35:25,612 INFO L356 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-07-20 06:35:25,612 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 18 [2022-07-20 06:35:25,705 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 06:35:25,706 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2022-07-20 06:35:25,729 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-07-20 06:35:25,786 INFO L356 Elim1Store]: treesize reduction 27, result has 57.1 percent of original size [2022-07-20 06:35:25,786 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 35 treesize of output 63 [2022-07-20 06:35:25,989 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-20 06:35:25,989 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 7 [2022-07-20 06:35:25,994 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-20 06:35:25,994 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 7 [2022-07-20 06:35:27,417 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:35:27,417 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 06:35:27,417 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 06:35:27,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [336074529] [2022-07-20 06:35:27,417 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [336074529] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 06:35:27,418 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 06:35:27,418 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-20 06:35:27,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285843871] [2022-07-20 06:35:27,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 06:35:27,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-20 06:35:27,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 06:35:27,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-20 06:35:27,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-07-20 06:35:27,418 INFO L87 Difference]: Start difference. First operand 138 states and 233 transitions. Second operand has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 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) [2022-07-20 06:35:28,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:35:28,645 INFO L93 Difference]: Finished difference Result 143 states and 239 transitions. [2022-07-20 06:35:28,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-20 06:35:28,646 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 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 [2022-07-20 06:35:28,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:35:28,646 INFO L225 Difference]: With dead ends: 143 [2022-07-20 06:35:28,646 INFO L226 Difference]: Without dead ends: 143 [2022-07-20 06:35:28,647 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2022-07-20 06:35:28,647 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 4 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 126 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-20 06:35:28,647 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 0 Invalid, 317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 182 Invalid, 0 Unknown, 126 Unchecked, 0.3s Time] [2022-07-20 06:35:28,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-07-20 06:35:28,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2022-07-20 06:35:28,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 90 states have (on average 2.6555555555555554) internal successors, (239), 142 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:35:28,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 239 transitions. [2022-07-20 06:35:28,650 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 239 transitions. Word has length 11 [2022-07-20 06:35:28,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:35:28,650 INFO L495 AbstractCegarLoop]: Abstraction has 143 states and 239 transitions. [2022-07-20 06:35:28,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 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) [2022-07-20 06:35:28,650 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 239 transitions. [2022-07-20 06:35:28,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-20 06:35:28,651 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:35:28,651 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:35:28,663 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-07-20 06:35:28,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 06:35:28,851 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting buildErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [buildErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, buildErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, buildErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 66 more)] === [2022-07-20 06:35:28,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:35:28,852 INFO L85 PathProgramCache]: Analyzing trace with hash 1287413377, now seen corresponding path program 1 times [2022-07-20 06:35:28,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 06:35:28,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2098875339] [2022-07-20 06:35:28,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:35:28,852 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 06:35:28,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 06:35:28,861 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 06:35:28,862 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-07-20 06:35:29,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:35:29,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 49 conjunts are in the unsatisfiable core [2022-07-20 06:35:29,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 06:35:29,122 INFO L390 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 [2022-07-20 06:35:29,131 INFO L390 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 [2022-07-20 06:35:29,207 INFO L356 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-07-20 06:35:29,207 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 18 [2022-07-20 06:35:29,232 INFO L356 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-07-20 06:35:29,232 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 18 [2022-07-20 06:35:29,305 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-20 06:35:29,305 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 7 [2022-07-20 06:35:29,312 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-20 06:35:29,312 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 7 [2022-07-20 06:35:29,346 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-20 06:35:29,347 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 30 [2022-07-20 06:35:29,353 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 19 [2022-07-20 06:35:29,399 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-20 06:35:29,406 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-20 06:35:29,436 INFO L356 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2022-07-20 06:35:29,437 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 17 [2022-07-20 06:35:29,441 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-07-20 06:35:29,461 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:35:29,462 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 06:35:29,913 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 62 [2022-07-20 06:35:29,916 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 102 treesize of output 94 [2022-07-20 06:35:30,474 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 32 [2022-07-20 06:35:31,047 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 62 [2022-07-20 06:35:31,050 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 102 treesize of output 94 [2022-07-20 06:35:31,636 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 32 [2022-07-20 06:35:32,184 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 32 [2022-07-20 06:35:32,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:35:32,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:35:32,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:35:32,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:35:41,724 WARN L233 SmtUtils]: Spent 8.22s on a formula simplification that was a NOOP. DAG size: 90 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-20 06:35:48,825 WARN L233 SmtUtils]: Spent 6.19s on a formula simplification that was a NOOP. DAG size: 90 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-20 06:35:49,216 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 06:35:49,219 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:35:49,219 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 06:35:49,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2098875339] [2022-07-20 06:35:49,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2098875339] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 06:35:49,219 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 06:35:49,219 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 15 [2022-07-20 06:35:49,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869699110] [2022-07-20 06:35:49,220 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 06:35:49,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-20 06:35:49,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 06:35:49,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-20 06:35:49,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=182, Unknown=9, NotChecked=0, Total=240 [2022-07-20 06:35:49,221 INFO L87 Difference]: Start difference. First operand 143 states and 239 transitions. Second operand has 16 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 16 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:35:50,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:35:50,069 INFO L93 Difference]: Finished difference Result 163 states and 273 transitions. [2022-07-20 06:35:50,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-20 06:35:50,070 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 16 states have internal predecessors, (22), 0 states have call successors, (0), 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 [2022-07-20 06:35:50,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:35:50,070 INFO L225 Difference]: With dead ends: 163 [2022-07-20 06:35:50,071 INFO L226 Difference]: Without dead ends: 163 [2022-07-20 06:35:50,071 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 16.6s TimeCoverageRelationStatistics Valid=114, Invalid=339, Unknown=9, NotChecked=0, Total=462 [2022-07-20 06:35:50,071 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 123 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 432 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 148 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-20 06:35:50,071 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 0 Invalid, 432 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 222 Invalid, 0 Unknown, 148 Unchecked, 0.6s Time] [2022-07-20 06:35:50,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2022-07-20 06:35:50,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 122. [2022-07-20 06:35:50,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 73 states have (on average 2.8219178082191783) internal successors, (206), 121 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:35:50,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 206 transitions. [2022-07-20 06:35:50,074 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 206 transitions. Word has length 11 [2022-07-20 06:35:50,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:35:50,074 INFO L495 AbstractCegarLoop]: Abstraction has 122 states and 206 transitions. [2022-07-20 06:35:50,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 16 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:35:50,074 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 206 transitions. [2022-07-20 06:35:50,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-20 06:35:50,074 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:35:50,074 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:35:50,097 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-07-20 06:35:50,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 06:35:50,275 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [buildErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, buildErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, buildErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 66 more)] === [2022-07-20 06:35:50,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:35:50,275 INFO L85 PathProgramCache]: Analyzing trace with hash -1288025498, now seen corresponding path program 2 times [2022-07-20 06:35:50,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 06:35:50,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2088498590] [2022-07-20 06:35:50,276 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 06:35:50,276 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 06:35:50,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 06:35:50,277 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 06:35:50,279 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-07-20 06:35:50,427 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-07-20 06:35:50,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 06:35:50,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 28 conjunts are in the unsatisfiable core [2022-07-20 06:35:50,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 06:35:50,448 INFO L356 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2022-07-20 06:35:50,449 INFO L390 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 1 case distinctions, treesize of input 9 treesize of output 18 [2022-07-20 06:35:50,491 INFO L356 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2022-07-20 06:35:50,491 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 21 [2022-07-20 06:35:50,528 INFO L356 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2022-07-20 06:35:50,528 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 27 [2022-07-20 06:35:50,607 INFO L356 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-07-20 06:35:50,607 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 18 [2022-07-20 06:35:50,625 INFO L356 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-07-20 06:35:50,626 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 18 [2022-07-20 06:35:50,740 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-07-20 06:35:50,782 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 06:35:50,783 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2022-07-20 06:35:50,837 INFO L356 Elim1Store]: treesize reduction 27, result has 57.1 percent of original size [2022-07-20 06:35:50,837 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 35 treesize of output 63 [2022-07-20 06:35:51,087 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-20 06:35:51,088 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 7 [2022-07-20 06:35:51,092 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-20 06:35:51,092 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 7 [2022-07-20 06:35:52,430 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:35:52,431 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 06:35:52,431 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 06:35:52,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2088498590] [2022-07-20 06:35:52,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2088498590] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 06:35:52,432 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 06:35:52,432 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-20 06:35:52,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102881647] [2022-07-20 06:35:52,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 06:35:52,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-20 06:35:52,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 06:35:52,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-20 06:35:52,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-07-20 06:35:52,435 INFO L87 Difference]: Start difference. First operand 122 states and 206 transitions. Second operand has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 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) [2022-07-20 06:35:52,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:35:52,823 INFO L93 Difference]: Finished difference Result 126 states and 211 transitions. [2022-07-20 06:35:52,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-20 06:35:52,824 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 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 [2022-07-20 06:35:52,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:35:52,824 INFO L225 Difference]: With dead ends: 126 [2022-07-20 06:35:52,824 INFO L226 Difference]: Without dead ends: 126 [2022-07-20 06:35:52,825 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=46, Invalid=135, Unknown=1, NotChecked=0, Total=182 [2022-07-20 06:35:52,825 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 5 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 129 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 06:35:52,825 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 0 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 172 Invalid, 0 Unknown, 129 Unchecked, 0.2s Time] [2022-07-20 06:35:52,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2022-07-20 06:35:52,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 121. [2022-07-20 06:35:52,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 72 states have (on average 2.8472222222222223) internal successors, (205), 120 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:35:52,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 205 transitions. [2022-07-20 06:35:52,828 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 205 transitions. Word has length 11 [2022-07-20 06:35:52,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:35:52,828 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 205 transitions. [2022-07-20 06:35:52,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 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) [2022-07-20 06:35:52,828 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 205 transitions. [2022-07-20 06:35:52,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-20 06:35:52,829 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:35:52,829 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:35:52,838 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-07-20 06:35:53,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 06:35:53,029 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [buildErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, buildErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, buildErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 66 more)] === [2022-07-20 06:35:53,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:35:53,030 INFO L85 PathProgramCache]: Analyzing trace with hash -207505928, now seen corresponding path program 3 times [2022-07-20 06:35:53,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 06:35:53,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [132949048] [2022-07-20 06:35:53,030 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-20 06:35:53,030 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 06:35:53,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 06:35:53,033 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 06:35:53,034 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-07-20 06:35:53,174 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-07-20 06:35:53,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 06:35:53,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 28 conjunts are in the unsatisfiable core [2022-07-20 06:35:53,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 06:35:53,192 INFO L356 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2022-07-20 06:35:53,193 INFO L390 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 1 case distinctions, treesize of input 9 treesize of output 18 [2022-07-20 06:35:53,220 INFO L356 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2022-07-20 06:35:53,220 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 21 [2022-07-20 06:35:53,244 INFO L356 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2022-07-20 06:35:53,244 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 27 [2022-07-20 06:35:53,312 INFO L356 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-07-20 06:35:53,313 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 18 [2022-07-20 06:35:53,327 INFO L356 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-07-20 06:35:53,327 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 18 [2022-07-20 06:35:53,421 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-07-20 06:35:53,460 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-20 06:35:53,460 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 7 [2022-07-20 06:35:53,466 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-20 06:35:53,466 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 7 [2022-07-20 06:35:53,506 INFO L356 Elim1Store]: treesize reduction 27, result has 57.1 percent of original size [2022-07-20 06:35:53,506 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 36 treesize of output 64 [2022-07-20 06:35:54,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:35:54,181 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 06:35:54,181 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 06:35:54,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [132949048] [2022-07-20 06:35:54,181 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [132949048] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 06:35:54,181 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 06:35:54,181 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-20 06:35:54,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432581190] [2022-07-20 06:35:54,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 06:35:54,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-20 06:35:54,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 06:35:54,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-20 06:35:54,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-07-20 06:35:54,182 INFO L87 Difference]: Start difference. First operand 121 states and 205 transitions. Second operand has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 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) [2022-07-20 06:35:54,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:35:54,741 INFO L93 Difference]: Finished difference Result 124 states and 207 transitions. [2022-07-20 06:35:54,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-20 06:35:54,742 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 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 [2022-07-20 06:35:54,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:35:54,742 INFO L225 Difference]: With dead ends: 124 [2022-07-20 06:35:54,742 INFO L226 Difference]: Without dead ends: 124 [2022-07-20 06:35:54,743 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=46, Invalid=135, Unknown=1, NotChecked=0, Total=182 [2022-07-20 06:35:54,743 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 8 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 135 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-20 06:35:54,743 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 0 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 170 Invalid, 0 Unknown, 135 Unchecked, 0.3s Time] [2022-07-20 06:35:54,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-07-20 06:35:54,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 119. [2022-07-20 06:35:54,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 70 states have (on average 2.8857142857142857) internal successors, (202), 118 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:35:54,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 202 transitions. [2022-07-20 06:35:54,745 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 202 transitions. Word has length 11 [2022-07-20 06:35:54,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:35:54,746 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 202 transitions. [2022-07-20 06:35:54,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 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) [2022-07-20 06:35:54,746 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 202 transitions. [2022-07-20 06:35:54,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-20 06:35:54,746 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:35:54,746 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:35:54,754 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Ended with exit code 0 [2022-07-20 06:35:54,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 06:35:54,947 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [buildErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, buildErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, buildErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 66 more)] === [2022-07-20 06:35:54,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:35:54,947 INFO L85 PathProgramCache]: Analyzing trace with hash -362716017, now seen corresponding path program 3 times [2022-07-20 06:35:54,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 06:35:54,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1905014238] [2022-07-20 06:35:54,948 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-20 06:35:54,948 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 06:35:54,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 06:35:54,949 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 06:35:54,951 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-07-20 06:35:55,189 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-20 06:35:55,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 06:35:55,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 40 conjunts are in the unsatisfiable core [2022-07-20 06:35:55,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 06:35:55,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:35:55,208 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-20 06:35:55,212 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2022-07-20 06:35:55,292 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-20 06:35:55,292 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-07-20 06:35:55,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:35:55,367 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-07-20 06:35:55,430 INFO L356 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-07-20 06:35:55,430 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 18 [2022-07-20 06:35:55,452 INFO L356 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-07-20 06:35:55,452 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 18 [2022-07-20 06:35:55,552 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-20 06:35:55,552 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 14 [2022-07-20 06:35:55,589 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-20 06:35:55,589 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 7 [2022-07-20 06:35:55,604 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-20 06:35:55,604 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 7 [2022-07-20 06:35:55,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:35:55,618 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-20 06:35:55,619 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 28 [2022-07-20 06:35:56,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:35:56,333 INFO L356 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2022-07-20 06:35:56,333 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 32 [2022-07-20 06:35:57,477 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:35:57,477 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 06:35:57,984 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-20 06:35:57,984 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 16 [2022-07-20 06:35:58,099 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-07-20 06:35:58,100 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2022-07-20 06:36:16,591 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 211 treesize of output 187 [2022-07-20 06:36:16,598 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 195 treesize of output 179 [2022-07-20 06:37:05,594 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:37:05,595 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 06:37:05,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1905014238] [2022-07-20 06:37:05,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1905014238] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 06:37:05,595 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 06:37:05,595 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-07-20 06:37:05,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775202450] [2022-07-20 06:37:05,595 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 06:37:05,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-20 06:37:05,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 06:37:05,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-20 06:37:05,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=230, Unknown=3, NotChecked=0, Total=306 [2022-07-20 06:37:05,596 INFO L87 Difference]: Start difference. First operand 119 states and 202 transitions. Second operand has 18 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:37:09,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:37:09,021 INFO L93 Difference]: Finished difference Result 220 states and 380 transitions. [2022-07-20 06:37:09,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-20 06:37:09,023 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 states have internal predecessors, (22), 0 states have call successors, (0), 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 [2022-07-20 06:37:09,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:37:09,024 INFO L225 Difference]: With dead ends: 220 [2022-07-20 06:37:09,024 INFO L226 Difference]: Without dead ends: 220 [2022-07-20 06:37:09,024 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 16.4s TimeCoverageRelationStatistics Valid=167, Invalid=480, Unknown=3, NotChecked=0, Total=650 [2022-07-20 06:37:09,025 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 69 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 359 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-20 06:37:09,025 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 0 Invalid, 557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 184 Invalid, 0 Unknown, 359 Unchecked, 0.5s Time] [2022-07-20 06:37:09,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2022-07-20 06:37:09,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 125. [2022-07-20 06:37:09,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 76 states have (on average 2.9078947368421053) internal successors, (221), 124 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:37:09,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 221 transitions. [2022-07-20 06:37:09,027 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 221 transitions. Word has length 11 [2022-07-20 06:37:09,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:37:09,028 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 221 transitions. [2022-07-20 06:37:09,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:37:09,028 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 221 transitions. [2022-07-20 06:37:09,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-20 06:37:09,028 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:37:09,028 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:37:09,039 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Ended with exit code 0 [2022-07-20 06:37:09,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 06:37:09,232 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [buildErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, buildErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, buildErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 66 more)] === [2022-07-20 06:37:09,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:37:09,233 INFO L85 PathProgramCache]: Analyzing trace with hash -363908679, now seen corresponding path program 2 times [2022-07-20 06:37:09,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 06:37:09,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [908149825] [2022-07-20 06:37:09,233 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 06:37:09,233 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 06:37:09,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 06:37:09,235 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 06:37:09,239 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-07-20 06:37:09,430 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-07-20 06:37:09,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 06:37:09,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 33 conjunts are in the unsatisfiable core [2022-07-20 06:37:09,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 06:37:09,469 INFO L356 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2022-07-20 06:37:09,469 INFO L390 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 1 case distinctions, treesize of input 9 treesize of output 18 [2022-07-20 06:37:09,486 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-20 06:37:09,486 INFO L390 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 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-20 06:37:09,544 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-20 06:37:09,545 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-07-20 06:37:09,562 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-20 06:37:09,562 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-07-20 06:37:09,625 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-20 06:37:09,626 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-07-20 06:37:09,691 INFO L356 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-07-20 06:37:09,691 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 18 [2022-07-20 06:37:09,714 INFO L356 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-07-20 06:37:09,714 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 18 [2022-07-20 06:37:09,830 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-20 06:37:09,830 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 14 [2022-07-20 06:37:09,868 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-20 06:37:09,868 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 14 [2022-07-20 06:37:09,895 INFO L356 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2022-07-20 06:37:09,895 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 32 [2022-07-20 06:37:09,947 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-20 06:37:09,947 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 7 [2022-07-20 06:37:09,955 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-20 06:37:09,955 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 7 [2022-07-20 06:37:10,303 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:37:10,303 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 06:37:10,303 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 06:37:10,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [908149825] [2022-07-20 06:37:10,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [908149825] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 06:37:10,303 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 06:37:10,303 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-20 06:37:10,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211152210] [2022-07-20 06:37:10,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 06:37:10,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-20 06:37:10,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 06:37:10,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-20 06:37:10,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-07-20 06:37:10,304 INFO L87 Difference]: Start difference. First operand 125 states and 221 transitions. Second operand has 9 states, 8 states have (on average 1.375) internal successors, (11), 8 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) [2022-07-20 06:37:11,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:37:11,037 INFO L93 Difference]: Finished difference Result 132 states and 230 transitions. [2022-07-20 06:37:11,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-20 06:37:11,037 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.375) internal successors, (11), 8 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 [2022-07-20 06:37:11,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:37:11,038 INFO L225 Difference]: With dead ends: 132 [2022-07-20 06:37:11,038 INFO L226 Difference]: Without dead ends: 132 [2022-07-20 06:37:11,038 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2022-07-20 06:37:11,038 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 6 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 122 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-20 06:37:11,038 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 0 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 165 Invalid, 0 Unknown, 122 Unchecked, 0.5s Time] [2022-07-20 06:37:11,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-07-20 06:37:11,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 126. [2022-07-20 06:37:11,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 77 states have (on average 2.896103896103896) internal successors, (223), 125 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:37:11,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 223 transitions. [2022-07-20 06:37:11,041 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 223 transitions. Word has length 11 [2022-07-20 06:37:11,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:37:11,041 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 223 transitions. [2022-07-20 06:37:11,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.375) internal successors, (11), 8 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) [2022-07-20 06:37:11,041 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 223 transitions. [2022-07-20 06:37:11,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-20 06:37:11,041 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:37:11,041 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:37:11,065 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Ended with exit code 0 [2022-07-20 06:37:11,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 06:37:11,250 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [buildErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, buildErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, buildErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 66 more)] === [2022-07-20 06:37:11,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:37:11,251 INFO L85 PathProgramCache]: Analyzing trace with hash -363908678, now seen corresponding path program 4 times [2022-07-20 06:37:11,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 06:37:11,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1326868294] [2022-07-20 06:37:11,251 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-20 06:37:11,251 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 06:37:11,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 06:37:11,252 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 06:37:11,254 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-07-20 06:37:11,429 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-20 06:37:11,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 06:37:11,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 28 conjunts are in the unsatisfiable core [2022-07-20 06:37:11,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 06:37:11,460 INFO L356 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2022-07-20 06:37:11,460 INFO L390 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 1 case distinctions, treesize of input 9 treesize of output 18 [2022-07-20 06:37:11,509 INFO L356 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2022-07-20 06:37:11,509 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 21 [2022-07-20 06:37:11,546 INFO L356 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2022-07-20 06:37:11,547 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 27 [2022-07-20 06:37:11,629 INFO L356 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-07-20 06:37:11,630 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 18 [2022-07-20 06:37:11,649 INFO L356 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-07-20 06:37:11,649 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 18 [2022-07-20 06:37:11,747 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-07-20 06:37:11,787 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 06:37:11,787 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2022-07-20 06:37:11,855 INFO L356 Elim1Store]: treesize reduction 27, result has 57.1 percent of original size [2022-07-20 06:37:11,856 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 36 treesize of output 64 [2022-07-20 06:37:12,066 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-20 06:37:12,066 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 7 [2022-07-20 06:37:12,072 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-20 06:37:12,072 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 7 [2022-07-20 06:37:13,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:37:13,745 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 06:37:13,745 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 06:37:13,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1326868294] [2022-07-20 06:37:13,745 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1326868294] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 06:37:13,745 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 06:37:13,745 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-20 06:37:13,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267256918] [2022-07-20 06:37:13,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 06:37:13,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-20 06:37:13,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 06:37:13,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-20 06:37:13,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-07-20 06:37:13,747 INFO L87 Difference]: Start difference. First operand 126 states and 223 transitions. Second operand has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 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) [2022-07-20 06:37:14,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:37:14,217 INFO L93 Difference]: Finished difference Result 132 states and 229 transitions. [2022-07-20 06:37:14,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-20 06:37:14,217 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 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 [2022-07-20 06:37:14,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:37:14,218 INFO L225 Difference]: With dead ends: 132 [2022-07-20 06:37:14,218 INFO L226 Difference]: Without dead ends: 132 [2022-07-20 06:37:14,218 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2022-07-20 06:37:14,219 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 5 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 119 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 06:37:14,219 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 0 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 172 Invalid, 0 Unknown, 119 Unchecked, 0.2s Time] [2022-07-20 06:37:14,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-07-20 06:37:14,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 123. [2022-07-20 06:37:14,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 74 states have (on average 2.945945945945946) internal successors, (218), 122 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:37:14,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 218 transitions. [2022-07-20 06:37:14,221 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 218 transitions. Word has length 11 [2022-07-20 06:37:14,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:37:14,221 INFO L495 AbstractCegarLoop]: Abstraction has 123 states and 218 transitions. [2022-07-20 06:37:14,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 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) [2022-07-20 06:37:14,221 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 218 transitions. [2022-07-20 06:37:14,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-07-20 06:37:14,221 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:37:14,221 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-07-20 06:37:14,231 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2022-07-20 06:37:14,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 06:37:14,428 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting buildErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [buildErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, buildErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, buildErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 66 more)] === [2022-07-20 06:37:14,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:37:14,429 INFO L85 PathProgramCache]: Analyzing trace with hash 1640707198, now seen corresponding path program 1 times [2022-07-20 06:37:14,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 06:37:14,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [877916889] [2022-07-20 06:37:14,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:37:14,429 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 06:37:14,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 06:37:14,430 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 06:37:14,432 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-07-20 06:37:14,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:37:14,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-20 06:37:14,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 06:37:14,660 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-20 06:37:14,689 INFO L356 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-07-20 06:37:14,689 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 19 [2022-07-20 06:37:14,756 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-20 06:37:14,756 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 27 [2022-07-20 06:37:14,761 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2022-07-20 06:37:14,781 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 06:37:14,781 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-07-20 06:37:14,952 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:37:14,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 06:37:15,036 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2022-07-20 06:37:15,049 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2022-07-20 06:37:15,099 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 06:37:15,100 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 29 [2022-07-20 06:37:15,108 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 26 [2022-07-20 06:37:15,286 INFO L356 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-07-20 06:37:15,286 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 1 [2022-07-20 06:37:15,288 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-20 06:37:15,288 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 06:37:15,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [877916889] [2022-07-20 06:37:15,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [877916889] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-20 06:37:15,288 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-20 06:37:15,288 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2022-07-20 06:37:15,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375182232] [2022-07-20 06:37:15,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 06:37:15,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 06:37:15,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 06:37:15,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 06:37:15,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-07-20 06:37:15,290 INFO L87 Difference]: Start difference. First operand 123 states and 218 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 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) [2022-07-20 06:37:15,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:37:15,472 INFO L93 Difference]: Finished difference Result 145 states and 256 transitions. [2022-07-20 06:37:15,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 06:37:15,473 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 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 12 [2022-07-20 06:37:15,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:37:15,473 INFO L225 Difference]: With dead ends: 145 [2022-07-20 06:37:15,473 INFO L226 Difference]: Without dead ends: 145 [2022-07-20 06:37:15,474 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-07-20 06:37:15,474 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 27 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 25 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 06:37:15,474 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 0 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 65 Invalid, 0 Unknown, 25 Unchecked, 0.2s Time] [2022-07-20 06:37:15,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2022-07-20 06:37:15,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 120. [2022-07-20 06:37:15,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 73 states have (on average 2.904109589041096) internal successors, (212), 119 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:37:15,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 212 transitions. [2022-07-20 06:37:15,482 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 212 transitions. Word has length 12 [2022-07-20 06:37:15,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:37:15,483 INFO L495 AbstractCegarLoop]: Abstraction has 120 states and 212 transitions. [2022-07-20 06:37:15,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 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) [2022-07-20 06:37:15,483 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 212 transitions. [2022-07-20 06:37:15,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-07-20 06:37:15,483 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:37:15,483 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-07-20 06:37:15,491 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Ended with exit code 0 [2022-07-20 06:37:15,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 06:37:15,683 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [buildErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, buildErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, buildErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 66 more)] === [2022-07-20 06:37:15,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:37:15,684 INFO L85 PathProgramCache]: Analyzing trace with hash 1640707135, now seen corresponding path program 4 times [2022-07-20 06:37:15,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 06:37:15,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [192609486] [2022-07-20 06:37:15,684 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-20 06:37:15,684 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 06:37:15,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 06:37:15,686 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 06:37:15,686 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-07-20 06:37:15,960 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-20 06:37:15,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 06:37:15,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 54 conjunts are in the unsatisfiable core [2022-07-20 06:37:15,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 06:37:15,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:37:15,981 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-20 06:37:15,985 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2022-07-20 06:37:16,051 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-20 06:37:16,051 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-07-20 06:37:16,120 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-20 06:37:16,120 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2022-07-20 06:37:16,212 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-07-20 06:37:16,212 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 18 [2022-07-20 06:37:16,250 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-07-20 06:37:16,250 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 18 [2022-07-20 06:37:16,391 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-20 06:37:16,392 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 14 [2022-07-20 06:37:16,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:37:16,438 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2022-07-20 06:37:16,460 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-20 06:37:16,461 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 7 [2022-07-20 06:37:16,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:37:16,475 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-20 06:37:16,475 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 31 [2022-07-20 06:37:16,505 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-20 06:37:16,506 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 7 [2022-07-20 06:37:16,645 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-20 06:37:16,659 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-20 06:37:16,842 INFO L356 Elim1Store]: treesize reduction 28, result has 58.2 percent of original size [2022-07-20 06:37:16,843 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 61 [2022-07-20 06:37:17,281 INFO L356 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-07-20 06:37:17,281 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 87 treesize of output 62 [2022-07-20 06:37:17,312 INFO L356 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-07-20 06:37:17,312 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 18 [2022-07-20 06:37:17,746 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 06:37:17,747 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 204 treesize of output 236 [2022-07-20 06:37:17,876 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 06:37:17,877 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 259 treesize of output 307 [2022-07-20 06:37:17,892 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-20 06:37:17,892 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 316 treesize of output 312