./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/ldv-memsafety/memleaks_test14_3.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version c3fed411 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/ldv-memsafety/memleaks_test14_3.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 12d7333ecc5650929161cd50df756e255d5b3c2b6fe8799d2d7337cf38a3a1cb --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-18 21:09:58,987 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-18 21:09:58,989 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-18 21:09:59,051 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-18 21:09:59,052 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-18 21:09:59,053 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-18 21:09:59,053 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-18 21:09:59,055 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-18 21:09:59,056 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-18 21:09:59,056 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-18 21:09:59,057 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-18 21:09:59,058 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-18 21:09:59,058 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-18 21:09:59,059 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-18 21:09:59,064 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-18 21:09:59,066 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-18 21:09:59,067 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-18 21:09:59,067 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-18 21:09:59,068 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-18 21:09:59,070 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-18 21:09:59,071 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-18 21:09:59,071 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-18 21:09:59,072 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-18 21:09:59,073 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-18 21:09:59,075 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-18 21:09:59,075 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-18 21:09:59,075 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-18 21:09:59,076 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-18 21:09:59,076 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-18 21:09:59,077 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-18 21:09:59,077 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-18 21:09:59,078 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-18 21:09:59,078 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-18 21:09:59,079 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-18 21:09:59,079 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-18 21:09:59,079 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-18 21:09:59,080 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-18 21:09:59,080 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-18 21:09:59,080 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-18 21:09:59,081 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-18 21:09:59,081 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-18 21:09:59,082 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-12-18 21:09:59,095 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-18 21:09:59,100 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-18 21:09:59,100 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-18 21:09:59,101 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-18 21:09:59,101 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-18 21:09:59,101 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-18 21:09:59,102 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-18 21:09:59,102 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-18 21:09:59,102 INFO L138 SettingsManager]: * Use SBE=true [2021-12-18 21:09:59,102 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-18 21:09:59,103 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-18 21:09:59,103 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-18 21:09:59,103 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-18 21:09:59,103 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-18 21:09:59,103 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-18 21:09:59,104 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-18 21:09:59,104 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-18 21:09:59,104 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-18 21:09:59,104 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-18 21:09:59,104 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-18 21:09:59,104 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-18 21:09:59,104 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-18 21:09:59,105 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-18 21:09:59,105 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-18 21:09:59,105 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-18 21:09:59,105 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-18 21:09:59,105 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-18 21:09:59,106 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-18 21:09:59,106 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-18 21:09:59,106 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-18 21:09:59,106 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-18 21:09:59,107 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 12d7333ecc5650929161cd50df756e255d5b3c2b6fe8799d2d7337cf38a3a1cb [2021-12-18 21:09:59,285 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-18 21:09:59,298 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-18 21:09:59,300 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-18 21:09:59,301 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-18 21:09:59,301 INFO L275 PluginConnector]: CDTParser initialized [2021-12-18 21:09:59,302 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-memsafety/memleaks_test14_3.i [2021-12-18 21:09:59,368 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c7fe21a7d/aa43d281ae5b4ea2ae731d108d194f39/FLAGef1341290 [2021-12-18 21:09:59,768 INFO L306 CDTParser]: Found 1 translation units. [2021-12-18 21:09:59,769 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-memsafety/memleaks_test14_3.i [2021-12-18 21:09:59,782 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c7fe21a7d/aa43d281ae5b4ea2ae731d108d194f39/FLAGef1341290 [2021-12-18 21:10:00,126 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c7fe21a7d/aa43d281ae5b4ea2ae731d108d194f39 [2021-12-18 21:10:00,128 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-18 21:10:00,129 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-18 21:10:00,141 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-18 21:10:00,142 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-18 21:10:00,145 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-18 21:10:00,145 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 09:10:00" (1/1) ... [2021-12-18 21:10:00,146 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5758529b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:10:00, skipping insertion in model container [2021-12-18 21:10:00,147 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 09:10:00" (1/1) ... [2021-12-18 21:10:00,151 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-18 21:10:00,189 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-18 21:10:00,545 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-18 21:10:00,556 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-12-18 21:10:00,557 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@1c2d6962 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:10:00, skipping insertion in model container [2021-12-18 21:10:00,557 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-18 21:10:00,557 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-12-18 21:10:00,559 INFO L158 Benchmark]: Toolchain (without parser) took 429.52ms. Allocated memory is still 107.0MB. Free memory was 82.9MB in the beginning and 80.4MB in the end (delta: 2.5MB). Peak memory consumption was 9.0MB. Max. memory is 16.1GB. [2021-12-18 21:10:00,560 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 86.0MB. Free memory is still 48.2MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-18 21:10:00,560 INFO L158 Benchmark]: CACSL2BoogieTranslator took 416.68ms. Allocated memory is still 107.0MB. Free memory was 82.6MB in the beginning and 80.4MB in the end (delta: 2.1MB). Peak memory consumption was 9.0MB. Max. memory is 16.1GB. [2021-12-18 21:10:00,562 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 86.0MB. Free memory is still 48.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 416.68ms. Allocated memory is still 107.0MB. Free memory was 82.6MB in the beginning and 80.4MB in the end (delta: 2.1MB). Peak memory consumption was 9.0MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 576]: Unsupported Syntax Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/ldv-memsafety/memleaks_test14_3.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 12d7333ecc5650929161cd50df756e255d5b3c2b6fe8799d2d7337cf38a3a1cb --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-18 21:10:02,172 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-18 21:10:02,174 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-18 21:10:02,211 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-18 21:10:02,211 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-18 21:10:02,214 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-18 21:10:02,214 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-18 21:10:02,218 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-18 21:10:02,219 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-18 21:10:02,223 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-18 21:10:02,224 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-18 21:10:02,225 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-18 21:10:02,225 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-18 21:10:02,227 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-18 21:10:02,228 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-18 21:10:02,232 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-18 21:10:02,232 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-18 21:10:02,233 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-18 21:10:02,234 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-18 21:10:02,239 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-18 21:10:02,240 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-18 21:10:02,240 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-18 21:10:02,241 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-18 21:10:02,242 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-18 21:10:02,247 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-18 21:10:02,247 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-18 21:10:02,247 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-18 21:10:02,249 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-18 21:10:02,249 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-18 21:10:02,250 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-18 21:10:02,250 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-18 21:10:02,250 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-18 21:10:02,251 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-18 21:10:02,252 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-18 21:10:02,253 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-18 21:10:02,253 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-18 21:10:02,253 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-18 21:10:02,254 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-18 21:10:02,254 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-18 21:10:02,255 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-18 21:10:02,255 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-18 21:10:02,256 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-12-18 21:10:02,283 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-18 21:10:02,283 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-18 21:10:02,284 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-18 21:10:02,284 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-18 21:10:02,285 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-18 21:10:02,285 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-18 21:10:02,286 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-18 21:10:02,286 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-18 21:10:02,286 INFO L138 SettingsManager]: * Use SBE=true [2021-12-18 21:10:02,286 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-18 21:10:02,287 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-18 21:10:02,287 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-18 21:10:02,287 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-18 21:10:02,288 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-18 21:10:02,288 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-18 21:10:02,288 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-18 21:10:02,288 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-18 21:10:02,288 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-18 21:10:02,288 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-18 21:10:02,288 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-18 21:10:02,288 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-12-18 21:10:02,289 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-12-18 21:10:02,289 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-18 21:10:02,289 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-18 21:10:02,289 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-18 21:10:02,289 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-18 21:10:02,289 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-18 21:10:02,289 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-18 21:10:02,290 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-18 21:10:02,290 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-18 21:10:02,290 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-12-18 21:10:02,290 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-12-18 21:10:02,290 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-18 21:10:02,290 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-12-18 21:10:02,290 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 12d7333ecc5650929161cd50df756e255d5b3c2b6fe8799d2d7337cf38a3a1cb [2021-12-18 21:10:02,539 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-18 21:10:02,555 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-18 21:10:02,557 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-18 21:10:02,558 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-18 21:10:02,558 INFO L275 PluginConnector]: CDTParser initialized [2021-12-18 21:10:02,559 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-memsafety/memleaks_test14_3.i [2021-12-18 21:10:02,601 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d8543d73c/8a348903291f47508cb27ddeef8db552/FLAG4da45d8ff [2021-12-18 21:10:02,996 INFO L306 CDTParser]: Found 1 translation units. [2021-12-18 21:10:02,996 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-memsafety/memleaks_test14_3.i [2021-12-18 21:10:03,007 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d8543d73c/8a348903291f47508cb27ddeef8db552/FLAG4da45d8ff [2021-12-18 21:10:03,336 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d8543d73c/8a348903291f47508cb27ddeef8db552 [2021-12-18 21:10:03,337 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-18 21:10:03,341 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-18 21:10:03,344 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-18 21:10:03,344 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-18 21:10:03,347 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-18 21:10:03,348 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 09:10:03" (1/1) ... [2021-12-18 21:10:03,349 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@532503c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:10:03, skipping insertion in model container [2021-12-18 21:10:03,349 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 09:10:03" (1/1) ... [2021-12-18 21:10:03,353 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-18 21:10:03,381 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-18 21:10:03,669 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-18 21:10:03,680 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-12-18 21:10:03,698 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-18 21:10:03,734 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-18 21:10:03,752 INFO L203 MainTranslator]: Completed pre-run [2021-12-18 21:10:03,786 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-18 21:10:03,830 INFO L208 MainTranslator]: Completed translation [2021-12-18 21:10:03,831 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:10:03 WrapperNode [2021-12-18 21:10:03,831 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-18 21:10:03,832 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-18 21:10:03,832 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-18 21:10:03,832 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-18 21:10:03,836 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:10:03" (1/1) ... [2021-12-18 21:10:03,853 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:10:03" (1/1) ... [2021-12-18 21:10:03,868 INFO L137 Inliner]: procedures = 168, calls = 79, calls flagged for inlining = 21, calls inlined = 6, statements flattened = 53 [2021-12-18 21:10:03,868 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-18 21:10:03,869 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-18 21:10:03,869 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-18 21:10:03,869 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-18 21:10:03,875 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:10:03" (1/1) ... [2021-12-18 21:10:03,875 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:10:03" (1/1) ... [2021-12-18 21:10:03,878 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:10:03" (1/1) ... [2021-12-18 21:10:03,878 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:10:03" (1/1) ... [2021-12-18 21:10:03,885 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:10:03" (1/1) ... [2021-12-18 21:10:03,888 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:10:03" (1/1) ... [2021-12-18 21:10:03,889 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:10:03" (1/1) ... [2021-12-18 21:10:03,891 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-18 21:10:03,892 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-18 21:10:03,892 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-18 21:10:03,892 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-18 21:10:03,892 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:10:03" (1/1) ... [2021-12-18 21:10:03,897 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-18 21:10:03,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 21:10:03,927 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-18 21:10:03,933 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-18 21:10:03,976 INFO L130 BoogieDeclarations]: Found specification of procedure __ldv_list_add [2021-12-18 21:10:03,976 INFO L138 BoogieDeclarations]: Found implementation of procedure __ldv_list_add [2021-12-18 21:10:03,976 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-12-18 21:10:03,976 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-12-18 21:10:03,977 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_list_add [2021-12-18 21:10:03,977 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_list_add [2021-12-18 21:10:03,977 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-18 21:10:03,977 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-18 21:10:03,977 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-18 21:10:03,977 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-18 21:10:03,977 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-18 21:10:03,978 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-18 21:10:03,978 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-18 21:10:03,978 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_list_del [2021-12-18 21:10:03,978 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_list_del [2021-12-18 21:10:03,978 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-18 21:10:03,978 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-18 21:10:04,114 INFO L236 CfgBuilder]: Building ICFG [2021-12-18 21:10:04,115 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-18 21:10:04,324 INFO L277 CfgBuilder]: Performing block encoding [2021-12-18 21:10:04,332 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-18 21:10:04,332 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-18 21:10:04,334 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 09:10:04 BoogieIcfgContainer [2021-12-18 21:10:04,334 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-18 21:10:04,336 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-18 21:10:04,336 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-18 21:10:04,338 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-18 21:10:04,338 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.12 09:10:03" (1/3) ... [2021-12-18 21:10:04,339 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3139b1f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 09:10:04, skipping insertion in model container [2021-12-18 21:10:04,339 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:10:03" (2/3) ... [2021-12-18 21:10:04,339 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3139b1f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 09:10:04, skipping insertion in model container [2021-12-18 21:10:04,340 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 09:10:04" (3/3) ... [2021-12-18 21:10:04,341 INFO L111 eAbstractionObserver]: Analyzing ICFG memleaks_test14_3.i [2021-12-18 21:10:04,345 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-18 21:10:04,346 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 26 error locations. [2021-12-18 21:10:04,396 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-18 21:10:04,401 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-18 21:10:04,401 INFO L340 AbstractCegarLoop]: Starting to check reachability of 26 error locations. [2021-12-18 21:10:04,410 INFO L276 IsEmpty]: Start isEmpty. Operand has 73 states, 38 states have (on average 1.7894736842105263) internal successors, (68), 65 states have internal predecessors, (68), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-18 21:10:04,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-18 21:10:04,417 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:10:04,418 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:10:04,418 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_list_addErr0REQUIRES_VIOLATION === [ldv_list_addErr0REQUIRES_VIOLATION, ldv_list_addErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION (and 22 more)] === [2021-12-18 21:10:04,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:10:04,425 INFO L85 PathProgramCache]: Analyzing trace with hash 57943215, now seen corresponding path program 1 times [2021-12-18 21:10:04,433 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:10:04,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [410355479] [2021-12-18 21:10:04,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:10:04,434 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:10:04,434 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:10:04,436 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:10:04,437 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-12-18 21:10:04,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:10:04,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-18 21:10:04,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:10:04,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:10:04,711 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-12-18 21:10:04,712 INFO L388 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 15 treesize of output 20 [2021-12-18 21:10:04,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:10:04,767 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 21:10:04,768 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:10:04,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [410355479] [2021-12-18 21:10:04,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [410355479] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 21:10:04,768 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:10:04,769 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-18 21:10:04,770 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138073503] [2021-12-18 21:10:04,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:10:04,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-18 21:10:04,778 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:10:04,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-18 21:10:04,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-18 21:10:04,818 INFO L87 Difference]: Start difference. First operand has 73 states, 38 states have (on average 1.7894736842105263) internal successors, (68), 65 states have internal predecessors, (68), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 7 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-18 21:10:05,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:10:05,047 INFO L93 Difference]: Finished difference Result 83 states and 87 transitions. [2021-12-18 21:10:05,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-18 21:10:05,049 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-12-18 21:10:05,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:10:05,054 INFO L225 Difference]: With dead ends: 83 [2021-12-18 21:10:05,054 INFO L226 Difference]: Without dead ends: 81 [2021-12-18 21:10:05,055 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-12-18 21:10:05,057 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 64 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 51 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 21:10:05,057 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 137 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 194 Invalid, 0 Unknown, 51 Unchecked, 0.2s Time] [2021-12-18 21:10:05,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-12-18 21:10:05,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 70. [2021-12-18 21:10:05,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 37 states have (on average 1.7297297297297298) internal successors, (64), 62 states have internal predecessors, (64), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-18 21:10:05,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 72 transitions. [2021-12-18 21:10:05,082 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 72 transitions. Word has length 12 [2021-12-18 21:10:05,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:10:05,083 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 72 transitions. [2021-12-18 21:10:05,083 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-18 21:10:05,083 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 72 transitions. [2021-12-18 21:10:05,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-18 21:10:05,083 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:10:05,084 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:10:05,095 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-12-18 21:10:05,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:10:05,291 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_list_addErr1REQUIRES_VIOLATION === [ldv_list_addErr0REQUIRES_VIOLATION, ldv_list_addErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION (and 22 more)] === [2021-12-18 21:10:05,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:10:05,291 INFO L85 PathProgramCache]: Analyzing trace with hash 57943216, now seen corresponding path program 1 times [2021-12-18 21:10:05,292 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:10:05,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1840124987] [2021-12-18 21:10:05,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:10:05,292 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:10:05,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:10:05,294 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:10:05,296 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-12-18 21:10:05,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:10:05,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-18 21:10:05,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:10:05,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:10:05,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:10:05,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:10:05,519 INFO L388 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 [2021-12-18 21:10:05,530 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 21:10:05,531 INFO L388 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 [2021-12-18 21:10:05,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:10:05,614 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 21:10:05,614 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:10:05,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1840124987] [2021-12-18 21:10:05,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1840124987] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 21:10:05,615 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:10:05,615 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-18 21:10:05,616 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714852843] [2021-12-18 21:10:05,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:10:05,621 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-18 21:10:05,621 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:10:05,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-18 21:10:05,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-18 21:10:05,622 INFO L87 Difference]: Start difference. First operand 70 states and 72 transitions. Second operand has 8 states, 6 states have (on average 1.5) internal successors, (9), 7 states have internal predecessors, (9), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-18 21:10:05,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:10:05,934 INFO L93 Difference]: Finished difference Result 88 states and 94 transitions. [2021-12-18 21:10:05,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-18 21:10:05,935 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 1.5) internal successors, (9), 7 states have internal predecessors, (9), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-12-18 21:10:05,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:10:05,936 INFO L225 Difference]: With dead ends: 88 [2021-12-18 21:10:05,936 INFO L226 Difference]: Without dead ends: 88 [2021-12-18 21:10:05,936 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-12-18 21:10:05,937 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 79 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 55 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-18 21:10:05,937 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 171 Invalid, 334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 270 Invalid, 0 Unknown, 55 Unchecked, 0.3s Time] [2021-12-18 21:10:05,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-12-18 21:10:05,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 69. [2021-12-18 21:10:05,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 37 states have (on average 1.7027027027027026) internal successors, (63), 61 states have internal predecessors, (63), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-18 21:10:05,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 71 transitions. [2021-12-18 21:10:05,952 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 71 transitions. Word has length 12 [2021-12-18 21:10:05,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:10:05,952 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 71 transitions. [2021-12-18 21:10:05,953 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 1.5) internal successors, (9), 7 states have internal predecessors, (9), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-18 21:10:05,953 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 71 transitions. [2021-12-18 21:10:05,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-18 21:10:05,953 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:10:05,954 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:10:05,961 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-12-18 21:10:06,154 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:10:06,154 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ldv_list_addErr0REQUIRES_VIOLATION, ldv_list_addErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION (and 22 more)] === [2021-12-18 21:10:06,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:10:06,155 INFO L85 PathProgramCache]: Analyzing trace with hash -967961449, now seen corresponding path program 1 times [2021-12-18 21:10:06,155 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:10:06,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1078043287] [2021-12-18 21:10:06,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:10:06,156 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:10:06,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:10:06,159 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:10:06,175 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-12-18 21:10:06,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:10:06,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-18 21:10:06,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:10:06,256 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:10:06,256 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 21:10:06,256 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:10:06,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1078043287] [2021-12-18 21:10:06,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1078043287] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 21:10:06,257 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:10:06,257 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-18 21:10:06,257 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639533118] [2021-12-18 21:10:06,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:10:06,258 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-18 21:10:06,259 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:10:06,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-18 21:10:06,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-18 21:10:06,260 INFO L87 Difference]: Start difference. First operand 69 states and 71 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-18 21:10:06,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:10:06,280 INFO L93 Difference]: Finished difference Result 95 states and 99 transitions. [2021-12-18 21:10:06,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-18 21:10:06,282 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-12-18 21:10:06,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:10:06,286 INFO L225 Difference]: With dead ends: 95 [2021-12-18 21:10:06,286 INFO L226 Difference]: Without dead ends: 95 [2021-12-18 21:10:06,289 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-18 21:10:06,291 INFO L933 BasicCegarLoop]: 92 mSDtfsCounter, 21 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 21:10:06,292 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 341 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 21:10:06,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-12-18 21:10:06,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 73. [2021-12-18 21:10:06,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 40 states have (on average 1.65) internal successors, (66), 64 states have internal predecessors, (66), 4 states have call successors, (4), 4 states have call predecessors, (4), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-12-18 21:10:06,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 75 transitions. [2021-12-18 21:10:06,303 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 75 transitions. Word has length 11 [2021-12-18 21:10:06,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:10:06,304 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 75 transitions. [2021-12-18 21:10:06,304 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-18 21:10:06,305 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 75 transitions. [2021-12-18 21:10:06,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-18 21:10:06,305 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:10:06,305 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:10:06,314 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-12-18 21:10:06,512 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:10:06,512 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ldv_list_addErr0REQUIRES_VIOLATION, ldv_list_addErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION (and 22 more)] === [2021-12-18 21:10:06,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:10:06,515 INFO L85 PathProgramCache]: Analyzing trace with hash -80457768, now seen corresponding path program 1 times [2021-12-18 21:10:06,515 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:10:06,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [353030799] [2021-12-18 21:10:06,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:10:06,516 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:10:06,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:10:06,517 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:10:06,517 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-12-18 21:10:06,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:10:06,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-18 21:10:06,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:10:06,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:10:06,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:10:06,605 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 21:10:06,605 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:10:06,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [353030799] [2021-12-18 21:10:06,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [353030799] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 21:10:06,606 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:10:06,606 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-18 21:10:06,606 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612932543] [2021-12-18 21:10:06,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:10:06,607 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-18 21:10:06,607 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:10:06,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-18 21:10:06,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-18 21:10:06,608 INFO L87 Difference]: Start difference. First operand 73 states and 75 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-18 21:10:06,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:10:06,796 INFO L93 Difference]: Finished difference Result 96 states and 103 transitions. [2021-12-18 21:10:06,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-18 21:10:06,798 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-12-18 21:10:06,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:10:06,799 INFO L225 Difference]: With dead ends: 96 [2021-12-18 21:10:06,799 INFO L226 Difference]: Without dead ends: 96 [2021-12-18 21:10:06,800 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-18 21:10:06,800 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 64 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 21:10:06,801 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 97 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-18 21:10:06,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-12-18 21:10:06,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 76. [2021-12-18 21:10:06,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 42 states have (on average 1.6428571428571428) internal successors, (69), 66 states have internal predecessors, (69), 5 states have call successors, (5), 4 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2021-12-18 21:10:06,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 80 transitions. [2021-12-18 21:10:06,805 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 80 transitions. Word has length 11 [2021-12-18 21:10:06,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:10:06,805 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 80 transitions. [2021-12-18 21:10:06,806 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-18 21:10:06,806 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 80 transitions. [2021-12-18 21:10:06,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-18 21:10:06,806 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:10:06,806 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:10:06,816 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-12-18 21:10:07,006 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:10:07,007 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ldv_list_addErr0REQUIRES_VIOLATION, ldv_list_addErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION (and 22 more)] === [2021-12-18 21:10:07,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:10:07,007 INFO L85 PathProgramCache]: Analyzing trace with hash -80457767, now seen corresponding path program 1 times [2021-12-18 21:10:07,008 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:10:07,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [371012859] [2021-12-18 21:10:07,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:10:07,008 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:10:07,008 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:10:07,009 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:10:07,012 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-12-18 21:10:07,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:10:07,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-18 21:10:07,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:10:07,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:10:07,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:10:07,144 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 21:10:07,144 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:10:07,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [371012859] [2021-12-18 21:10:07,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [371012859] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 21:10:07,144 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:10:07,144 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-18 21:10:07,144 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39153121] [2021-12-18 21:10:07,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:10:07,145 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-18 21:10:07,145 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:10:07,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-18 21:10:07,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-18 21:10:07,145 INFO L87 Difference]: Start difference. First operand 76 states and 80 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-18 21:10:07,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:10:07,329 INFO L93 Difference]: Finished difference Result 93 states and 97 transitions. [2021-12-18 21:10:07,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-18 21:10:07,330 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-12-18 21:10:07,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:10:07,330 INFO L225 Difference]: With dead ends: 93 [2021-12-18 21:10:07,331 INFO L226 Difference]: Without dead ends: 93 [2021-12-18 21:10:07,331 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-18 21:10:07,331 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 66 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 21:10:07,332 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 112 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-18 21:10:07,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-12-18 21:10:07,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 76. [2021-12-18 21:10:07,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 42 states have (on average 1.619047619047619) internal successors, (68), 66 states have internal predecessors, (68), 5 states have call successors, (5), 4 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2021-12-18 21:10:07,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 79 transitions. [2021-12-18 21:10:07,337 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 79 transitions. Word has length 11 [2021-12-18 21:10:07,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:10:07,337 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 79 transitions. [2021-12-18 21:10:07,337 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-18 21:10:07,337 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 79 transitions. [2021-12-18 21:10:07,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-18 21:10:07,338 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:10:07,338 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:10:07,351 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-12-18 21:10:07,548 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:10:07,549 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __ldv_list_addErr1REQUIRES_VIOLATION === [ldv_list_addErr0REQUIRES_VIOLATION, ldv_list_addErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION (and 22 more)] === [2021-12-18 21:10:07,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:10:07,549 INFO L85 PathProgramCache]: Analyzing trace with hash -390474800, now seen corresponding path program 1 times [2021-12-18 21:10:07,549 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:10:07,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1387242986] [2021-12-18 21:10:07,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:10:07,550 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:10:07,550 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:10:07,551 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:10:07,552 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-12-18 21:10:07,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:10:07,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 32 conjunts are in the unsatisfiable core [2021-12-18 21:10:07,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:10:07,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:10:07,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:10:07,687 INFO L388 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 5 treesize of output 3 [2021-12-18 21:10:07,691 INFO L388 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 [2021-12-18 21:10:09,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:10:09,844 INFO L388 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 [2021-12-18 21:10:09,853 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 21:10:09,853 INFO L388 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 [2021-12-18 21:10:09,996 INFO L388 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 15 treesize of output 7 [2021-12-18 21:10:10,000 INFO L388 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 15 treesize of output 7 [2021-12-18 21:10:10,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:10:10,082 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 21:10:10,083 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:10:10,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1387242986] [2021-12-18 21:10:10,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1387242986] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 21:10:10,083 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:10:10,083 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-18 21:10:10,083 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822075044] [2021-12-18 21:10:10,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:10:10,083 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-18 21:10:10,083 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:10:10,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-18 21:10:10,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=89, Unknown=1, NotChecked=0, Total=110 [2021-12-18 21:10:10,084 INFO L87 Difference]: Start difference. First operand 76 states and 79 transitions. Second operand has 11 states, 8 states have (on average 1.375) internal successors, (11), 9 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-18 21:10:10,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:10:10,430 INFO L93 Difference]: Finished difference Result 94 states and 97 transitions. [2021-12-18 21:10:10,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-18 21:10:10,431 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 8 states have (on average 1.375) internal successors, (11), 9 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-12-18 21:10:10,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:10:10,431 INFO L225 Difference]: With dead ends: 94 [2021-12-18 21:10:10,431 INFO L226 Difference]: Without dead ends: 94 [2021-12-18 21:10:10,432 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=34, Invalid=147, Unknown=1, NotChecked=0, Total=182 [2021-12-18 21:10:10,432 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 30 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 347 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 111 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-18 21:10:10,432 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 347 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 196 Invalid, 0 Unknown, 111 Unchecked, 0.3s Time] [2021-12-18 21:10:10,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-12-18 21:10:10,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 86. [2021-12-18 21:10:10,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 50 states have (on average 1.66) internal successors, (83), 74 states have internal predecessors, (83), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2021-12-18 21:10:10,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 96 transitions. [2021-12-18 21:10:10,437 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 96 transitions. Word has length 15 [2021-12-18 21:10:10,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:10:10,437 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 96 transitions. [2021-12-18 21:10:10,437 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 8 states have (on average 1.375) internal successors, (11), 9 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-18 21:10:10,437 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 96 transitions. [2021-12-18 21:10:10,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-18 21:10:10,438 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:10:10,438 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:10:10,448 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-12-18 21:10:10,638 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:10:10,639 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __ldv_list_addErr0REQUIRES_VIOLATION === [ldv_list_addErr0REQUIRES_VIOLATION, ldv_list_addErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION (and 22 more)] === [2021-12-18 21:10:10,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:10:10,639 INFO L85 PathProgramCache]: Analyzing trace with hash -390474801, now seen corresponding path program 1 times [2021-12-18 21:10:10,639 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:10:10,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1357952732] [2021-12-18 21:10:10,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:10:10,639 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:10:10,640 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:10:10,641 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:10:10,668 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-12-18 21:10:10,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:10:10,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-18 21:10:10,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:10:10,769 INFO L388 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 15 treesize of output 7 [2021-12-18 21:10:10,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:10:10,798 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 21:10:10,798 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:10:10,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1357952732] [2021-12-18 21:10:10,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1357952732] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 21:10:10,799 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:10:10,799 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-18 21:10:10,799 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101152245] [2021-12-18 21:10:10,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:10:10,799 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-18 21:10:10,799 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:10:10,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-18 21:10:10,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-12-18 21:10:10,800 INFO L87 Difference]: Start difference. First operand 86 states and 96 transitions. Second operand has 9 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-18 21:10:10,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:10:10,990 INFO L93 Difference]: Finished difference Result 94 states and 104 transitions. [2021-12-18 21:10:10,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-18 21:10:10,990 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-12-18 21:10:10,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:10:10,991 INFO L225 Difference]: With dead ends: 94 [2021-12-18 21:10:10,991 INFO L226 Difference]: Without dead ends: 94 [2021-12-18 21:10:10,991 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-12-18 21:10:10,992 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 40 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 25 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 21:10:10,992 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 303 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 134 Invalid, 0 Unknown, 25 Unchecked, 0.2s Time] [2021-12-18 21:10:10,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-12-18 21:10:10,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 85. [2021-12-18 21:10:10,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 50 states have (on average 1.62) internal successors, (81), 73 states have internal predecessors, (81), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2021-12-18 21:10:10,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 94 transitions. [2021-12-18 21:10:10,996 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 94 transitions. Word has length 15 [2021-12-18 21:10:10,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:10:10,996 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 94 transitions. [2021-12-18 21:10:10,997 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-18 21:10:10,997 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 94 transitions. [2021-12-18 21:10:10,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-18 21:10:10,997 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:10:10,997 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:10:11,006 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-12-18 21:10:11,204 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:10:11,204 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __ldv_list_addErr1REQUIRES_VIOLATION === [ldv_list_addErr0REQUIRES_VIOLATION, ldv_list_addErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION (and 22 more)] === [2021-12-18 21:10:11,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:10:11,205 INFO L85 PathProgramCache]: Analyzing trace with hash 2107541137, now seen corresponding path program 1 times [2021-12-18 21:10:11,205 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:10:11,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1387159976] [2021-12-18 21:10:11,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:10:11,205 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:10:11,205 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:10:11,207 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) [2021-12-18 21:10:11,211 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-12-18 21:10:11,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:10:11,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-18 21:10:11,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:10:11,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:10:11,309 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 21:10:11,309 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:10:11,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1387159976] [2021-12-18 21:10:11,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1387159976] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 21:10:11,310 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:10:11,310 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-18 21:10:11,310 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314192109] [2021-12-18 21:10:11,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:10:11,310 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-18 21:10:11,310 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:10:11,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-18 21:10:11,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-18 21:10:11,311 INFO L87 Difference]: Start difference. First operand 85 states and 94 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-18 21:10:11,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:10:11,323 INFO L93 Difference]: Finished difference Result 90 states and 92 transitions. [2021-12-18 21:10:11,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-18 21:10:11,324 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-12-18 21:10:11,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:10:11,324 INFO L225 Difference]: With dead ends: 90 [2021-12-18 21:10:11,325 INFO L226 Difference]: Without dead ends: 90 [2021-12-18 21:10:11,325 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-18 21:10:11,325 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 19 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 21:10:11,326 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 274 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 21:10:11,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-12-18 21:10:11,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 73. [2021-12-18 21:10:11,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 42 states have (on average 1.5476190476190477) internal successors, (65), 63 states have internal predecessors, (65), 4 states have call successors, (4), 4 states have call predecessors, (4), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-12-18 21:10:11,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 74 transitions. [2021-12-18 21:10:11,329 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 74 transitions. Word has length 15 [2021-12-18 21:10:11,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:10:11,329 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 74 transitions. [2021-12-18 21:10:11,329 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-18 21:10:11,329 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 74 transitions. [2021-12-18 21:10:11,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-18 21:10:11,330 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:10:11,330 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:10:11,338 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-12-18 21:10:11,537 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:10:11,537 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __ldv_list_addErr2REQUIRES_VIOLATION === [ldv_list_addErr0REQUIRES_VIOLATION, ldv_list_addErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION (and 22 more)] === [2021-12-18 21:10:11,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:10:11,538 INFO L85 PathProgramCache]: Analyzing trace with hash 780183108, now seen corresponding path program 1 times [2021-12-18 21:10:11,538 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:10:11,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [347384248] [2021-12-18 21:10:11,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:10:11,539 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:10:11,539 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:10:11,540 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) [2021-12-18 21:10:11,542 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-12-18 21:10:11,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:10:11,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-18 21:10:11,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:10:11,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:10:11,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:10:11,700 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 21:10:11,700 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:10:11,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [347384248] [2021-12-18 21:10:11,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [347384248] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 21:10:11,700 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:10:11,700 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-18 21:10:11,701 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806284576] [2021-12-18 21:10:11,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:10:11,701 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-18 21:10:11,701 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:10:11,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-18 21:10:11,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-12-18 21:10:11,702 INFO L87 Difference]: Start difference. First operand 73 states and 74 transitions. Second operand has 9 states, 8 states have (on average 1.5) internal successors, (12), 6 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-18 21:10:12,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:10:12,079 INFO L93 Difference]: Finished difference Result 81 states and 84 transitions. [2021-12-18 21:10:12,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-18 21:10:12,079 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.5) internal successors, (12), 6 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2021-12-18 21:10:12,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:10:12,080 INFO L225 Difference]: With dead ends: 81 [2021-12-18 21:10:12,080 INFO L226 Difference]: Without dead ends: 81 [2021-12-18 21:10:12,080 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-12-18 21:10:12,081 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 36 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 317 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-18 21:10:12,081 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 317 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-18 21:10:12,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-12-18 21:10:12,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 71. [2021-12-18 21:10:12,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 42 states have (on average 1.5) internal successors, (63), 61 states have internal predecessors, (63), 4 states have call successors, (4), 4 states have call predecessors, (4), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-12-18 21:10:12,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 72 transitions. [2021-12-18 21:10:12,084 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 72 transitions. Word has length 16 [2021-12-18 21:10:12,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:10:12,084 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 72 transitions. [2021-12-18 21:10:12,084 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.5) internal successors, (12), 6 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-18 21:10:12,084 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 72 transitions. [2021-12-18 21:10:12,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-18 21:10:12,085 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:10:12,085 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:10:12,105 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-12-18 21:10:12,293 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:10:12,293 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __ldv_list_addErr3REQUIRES_VIOLATION === [ldv_list_addErr0REQUIRES_VIOLATION, ldv_list_addErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION (and 22 more)] === [2021-12-18 21:10:12,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:10:12,294 INFO L85 PathProgramCache]: Analyzing trace with hash 780183109, now seen corresponding path program 1 times [2021-12-18 21:10:12,294 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:10:12,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [434680828] [2021-12-18 21:10:12,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:10:12,294 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:10:12,294 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:10:12,295 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) [2021-12-18 21:10:12,297 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-12-18 21:10:12,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:10:12,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-18 21:10:12,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:10:12,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:10:12,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:10:12,568 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 21:10:12,569 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:10:12,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [434680828] [2021-12-18 21:10:12,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [434680828] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 21:10:12,569 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:10:12,569 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-18 21:10:12,569 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044571881] [2021-12-18 21:10:12,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:10:12,569 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-18 21:10:12,570 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:10:12,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-18 21:10:12,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-12-18 21:10:12,570 INFO L87 Difference]: Start difference. First operand 71 states and 72 transitions. Second operand has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 7 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-18 21:10:12,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:10:12,913 INFO L93 Difference]: Finished difference Result 86 states and 88 transitions. [2021-12-18 21:10:12,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-18 21:10:12,914 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 7 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2021-12-18 21:10:12,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:10:12,915 INFO L225 Difference]: With dead ends: 86 [2021-12-18 21:10:12,915 INFO L226 Difference]: Without dead ends: 86 [2021-12-18 21:10:12,915 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-12-18 21:10:12,915 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 44 mSDsluCounter, 385 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 452 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-18 21:10:12,916 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 452 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-18 21:10:12,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-12-18 21:10:12,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 69. [2021-12-18 21:10:12,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 42 states have (on average 1.4523809523809523) internal successors, (61), 59 states have internal predecessors, (61), 4 states have call successors, (4), 4 states have call predecessors, (4), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-12-18 21:10:12,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2021-12-18 21:10:12,918 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 16 [2021-12-18 21:10:12,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:10:12,919 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2021-12-18 21:10:12,919 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 7 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-18 21:10:12,919 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2021-12-18 21:10:12,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-18 21:10:12,919 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:10:12,919 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:10:12,929 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-12-18 21:10:13,126 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:10:13,126 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_list_delErr0REQUIRES_VIOLATION === [ldv_list_addErr0REQUIRES_VIOLATION, ldv_list_addErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION (and 22 more)] === [2021-12-18 21:10:13,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:10:13,127 INFO L85 PathProgramCache]: Analyzing trace with hash 615640452, now seen corresponding path program 1 times [2021-12-18 21:10:13,127 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:10:13,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [497298203] [2021-12-18 21:10:13,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:10:13,128 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:10:13,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:10:13,128 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) [2021-12-18 21:10:13,130 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-12-18 21:10:13,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:10:13,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-18 21:10:13,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:10:13,353 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 21:10:13,354 INFO L388 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 10 [2021-12-18 21:10:13,358 INFO L388 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 21:10:13,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:10:13,398 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 21:10:13,398 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:10:13,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [497298203] [2021-12-18 21:10:13,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [497298203] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 21:10:13,398 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:10:13,398 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-18 21:10:13,398 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378192104] [2021-12-18 21:10:13,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:10:13,399 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-18 21:10:13,399 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:10:13,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-18 21:10:13,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-18 21:10:13,399 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-18 21:10:13,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:10:13,471 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2021-12-18 21:10:13,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-18 21:10:13,471 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2021-12-18 21:10:13,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:10:13,472 INFO L225 Difference]: With dead ends: 75 [2021-12-18 21:10:13,472 INFO L226 Difference]: Without dead ends: 75 [2021-12-18 21:10:13,472 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-12-18 21:10:13,472 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 14 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 17 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 21:10:13,473 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 216 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 17 Unchecked, 0.0s Time] [2021-12-18 21:10:13,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-12-18 21:10:13,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 71. [2021-12-18 21:10:13,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 44 states have (on average 1.4318181818181819) internal successors, (63), 61 states have internal predecessors, (63), 4 states have call successors, (4), 4 states have call predecessors, (4), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-12-18 21:10:13,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 72 transitions. [2021-12-18 21:10:13,475 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 72 transitions. Word has length 16 [2021-12-18 21:10:13,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:10:13,476 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 72 transitions. [2021-12-18 21:10:13,476 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-18 21:10:13,476 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 72 transitions. [2021-12-18 21:10:13,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-18 21:10:13,476 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:10:13,476 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:10:13,485 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-12-18 21:10:13,679 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:10:13,679 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __ldv_list_addErr6REQUIRES_VIOLATION === [ldv_list_addErr0REQUIRES_VIOLATION, ldv_list_addErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION (and 22 more)] === [2021-12-18 21:10:13,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:10:13,680 INFO L85 PathProgramCache]: Analyzing trace with hash -1863308281, now seen corresponding path program 1 times [2021-12-18 21:10:13,680 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:10:13,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [167814258] [2021-12-18 21:10:13,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:10:13,680 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:10:13,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:10:13,681 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) [2021-12-18 21:10:13,682 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-12-18 21:10:13,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:10:13,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-18 21:10:13,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:10:13,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:10:13,781 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 21:10:13,782 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:10:13,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [167814258] [2021-12-18 21:10:13,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [167814258] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 21:10:13,782 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:10:13,782 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-18 21:10:13,782 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008956908] [2021-12-18 21:10:13,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:10:13,783 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-18 21:10:13,783 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:10:13,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-18 21:10:13,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-18 21:10:13,783 INFO L87 Difference]: Start difference. First operand 71 states and 72 transitions. Second operand has 5 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-18 21:10:13,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:10:13,873 INFO L93 Difference]: Finished difference Result 70 states and 71 transitions. [2021-12-18 21:10:13,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-18 21:10:13,873 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2021-12-18 21:10:13,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:10:13,874 INFO L225 Difference]: With dead ends: 70 [2021-12-18 21:10:13,874 INFO L226 Difference]: Without dead ends: 70 [2021-12-18 21:10:13,874 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-18 21:10:13,874 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 12 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 21:10:13,875 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 157 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 21:10:13,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-12-18 21:10:13,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2021-12-18 21:10:13,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 44 states have (on average 1.4090909090909092) internal successors, (62), 60 states have internal predecessors, (62), 4 states have call successors, (4), 4 states have call predecessors, (4), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-12-18 21:10:13,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 71 transitions. [2021-12-18 21:10:13,877 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 71 transitions. Word has length 18 [2021-12-18 21:10:13,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:10:13,877 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 71 transitions. [2021-12-18 21:10:13,877 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-18 21:10:13,877 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 71 transitions. [2021-12-18 21:10:13,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-18 21:10:13,878 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:10:13,878 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:10:13,885 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-12-18 21:10:14,083 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:10:14,084 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __ldv_list_addErr7REQUIRES_VIOLATION === [ldv_list_addErr0REQUIRES_VIOLATION, ldv_list_addErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION (and 22 more)] === [2021-12-18 21:10:14,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:10:14,084 INFO L85 PathProgramCache]: Analyzing trace with hash -1863308280, now seen corresponding path program 1 times [2021-12-18 21:10:14,085 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:10:14,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1857519559] [2021-12-18 21:10:14,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:10:14,085 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:10:14,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:10:14,086 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) [2021-12-18 21:10:14,087 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-12-18 21:10:14,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:10:14,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-18 21:10:14,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:10:14,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:10:14,260 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 21:10:14,260 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:10:14,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1857519559] [2021-12-18 21:10:14,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1857519559] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 21:10:14,260 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:10:14,260 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-18 21:10:14,260 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264065852] [2021-12-18 21:10:14,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:10:14,260 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-18 21:10:14,260 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:10:14,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-18 21:10:14,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-18 21:10:14,261 INFO L87 Difference]: Start difference. First operand 70 states and 71 transitions. Second operand has 8 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-18 21:10:14,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:10:14,435 INFO L93 Difference]: Finished difference Result 69 states and 70 transitions. [2021-12-18 21:10:14,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-18 21:10:14,436 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2021-12-18 21:10:14,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:10:14,437 INFO L225 Difference]: With dead ends: 69 [2021-12-18 21:10:14,437 INFO L226 Difference]: Without dead ends: 69 [2021-12-18 21:10:14,437 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-12-18 21:10:14,437 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 38 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 21:10:14,438 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 259 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 21:10:14,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-12-18 21:10:14,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2021-12-18 21:10:14,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 44 states have (on average 1.3863636363636365) internal successors, (61), 59 states have internal predecessors, (61), 4 states have call successors, (4), 4 states have call predecessors, (4), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-12-18 21:10:14,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2021-12-18 21:10:14,439 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 18 [2021-12-18 21:10:14,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:10:14,440 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2021-12-18 21:10:14,440 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-18 21:10:14,440 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2021-12-18 21:10:14,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-18 21:10:14,440 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:10:14,440 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:10:14,449 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-12-18 21:10:14,640 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:10:14,641 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ldv_list_addErr0REQUIRES_VIOLATION, ldv_list_addErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION (and 22 more)] === [2021-12-18 21:10:14,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:10:14,641 INFO L85 PathProgramCache]: Analyzing trace with hash 615538426, now seen corresponding path program 1 times [2021-12-18 21:10:14,641 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:10:14,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [983432863] [2021-12-18 21:10:14,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:10:14,642 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:10:14,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:10:14,643 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) [2021-12-18 21:10:14,644 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-12-18 21:10:14,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:10:14,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-18 21:10:14,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:10:14,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:10:14,808 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 21:10:14,808 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:10:14,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [983432863] [2021-12-18 21:10:14,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [983432863] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 21:10:14,808 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:10:14,808 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-18 21:10:14,808 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99521965] [2021-12-18 21:10:14,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:10:14,809 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-18 21:10:14,809 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:10:14,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-18 21:10:14,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-18 21:10:14,809 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-18 21:10:14,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:10:14,870 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2021-12-18 21:10:14,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-18 21:10:14,871 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2021-12-18 21:10:14,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:10:14,871 INFO L225 Difference]: With dead ends: 72 [2021-12-18 21:10:14,871 INFO L226 Difference]: Without dead ends: 61 [2021-12-18 21:10:14,872 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-18 21:10:14,872 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 26 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 86 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 21:10:14,872 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 104 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 26 Invalid, 0 Unknown, 86 Unchecked, 0.1s Time] [2021-12-18 21:10:14,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-12-18 21:10:14,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2021-12-18 21:10:14,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 37 states have (on average 1.4324324324324325) internal successors, (53), 52 states have internal predecessors, (53), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-18 21:10:14,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2021-12-18 21:10:14,874 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 16 [2021-12-18 21:10:14,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:10:14,874 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2021-12-18 21:10:14,874 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-18 21:10:14,874 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2021-12-18 21:10:14,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-18 21:10:14,874 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:10:14,875 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:10:14,886 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-12-18 21:10:15,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:10:15,075 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ldv_list_addErr0REQUIRES_VIOLATION, ldv_list_addErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION (and 22 more)] === [2021-12-18 21:10:15,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:10:15,076 INFO L85 PathProgramCache]: Analyzing trace with hash -632903047, now seen corresponding path program 1 times [2021-12-18 21:10:15,076 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:10:15,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1882484319] [2021-12-18 21:10:15,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:10:15,076 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:10:15,076 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:10:15,077 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) [2021-12-18 21:10:15,080 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-12-18 21:10:15,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:10:15,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-18 21:10:15,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:10:15,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:10:15,258 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 21:10:15,258 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:10:15,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1882484319] [2021-12-18 21:10:15,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1882484319] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 21:10:15,259 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:10:15,259 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-18 21:10:15,259 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816546152] [2021-12-18 21:10:15,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:10:15,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-18 21:10:15,259 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:10:15,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-18 21:10:15,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-18 21:10:15,260 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-18 21:10:15,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:10:15,371 INFO L93 Difference]: Finished difference Result 69 states and 71 transitions. [2021-12-18 21:10:15,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-18 21:10:15,371 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 25 [2021-12-18 21:10:15,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:10:15,372 INFO L225 Difference]: With dead ends: 69 [2021-12-18 21:10:15,372 INFO L226 Difference]: Without dead ends: 69 [2021-12-18 21:10:15,372 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-12-18 21:10:15,373 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 47 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 25 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 21:10:15,373 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 207 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 77 Invalid, 0 Unknown, 25 Unchecked, 0.1s Time] [2021-12-18 21:10:15,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-12-18 21:10:15,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 60. [2021-12-18 21:10:15,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 37 states have (on average 1.4054054054054055) internal successors, (52), 51 states have internal predecessors, (52), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-18 21:10:15,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2021-12-18 21:10:15,375 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 25 [2021-12-18 21:10:15,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:10:15,375 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2021-12-18 21:10:15,376 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-18 21:10:15,376 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2021-12-18 21:10:15,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-18 21:10:15,376 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:10:15,376 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:10:15,386 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2021-12-18 21:10:15,584 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:10:15,584 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ldv_list_addErr0REQUIRES_VIOLATION, ldv_list_addErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION (and 22 more)] === [2021-12-18 21:10:15,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:10:15,585 INFO L85 PathProgramCache]: Analyzing trace with hash -632903046, now seen corresponding path program 1 times [2021-12-18 21:10:15,585 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:10:15,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [989011475] [2021-12-18 21:10:15,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:10:15,585 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:10:15,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:10:15,587 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) [2021-12-18 21:10:15,589 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-12-18 21:10:15,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:10:15,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-18 21:10:15,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:10:15,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:10:15,852 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 21:10:15,852 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:10:15,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [989011475] [2021-12-18 21:10:15,852 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [989011475] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 21:10:15,852 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:10:15,852 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-18 21:10:15,852 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43862555] [2021-12-18 21:10:15,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:10:15,853 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-18 21:10:15,853 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:10:15,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-18 21:10:15,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-18 21:10:15,853 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-18 21:10:16,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:10:16,069 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2021-12-18 21:10:16,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-18 21:10:16,070 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 25 [2021-12-18 21:10:16,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:10:16,071 INFO L225 Difference]: With dead ends: 59 [2021-12-18 21:10:16,071 INFO L226 Difference]: Without dead ends: 59 [2021-12-18 21:10:16,071 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-12-18 21:10:16,071 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 49 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 21:10:16,071 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 196 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-18 21:10:16,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-12-18 21:10:16,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2021-12-18 21:10:16,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 37 states have (on average 1.3783783783783783) internal successors, (51), 50 states have internal predecessors, (51), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-18 21:10:16,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2021-12-18 21:10:16,073 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 25 [2021-12-18 21:10:16,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:10:16,073 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2021-12-18 21:10:16,073 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-18 21:10:16,073 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2021-12-18 21:10:16,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-18 21:10:16,074 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:10:16,074 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:10:16,084 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-12-18 21:10:16,274 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:10:16,274 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ldv_list_delErr0REQUIRES_VIOLATION === [ldv_list_addErr0REQUIRES_VIOLATION, ldv_list_addErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION (and 22 more)] === [2021-12-18 21:10:16,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:10:16,275 INFO L85 PathProgramCache]: Analyzing trace with hash -2017194109, now seen corresponding path program 1 times [2021-12-18 21:10:16,275 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:10:16,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1001804112] [2021-12-18 21:10:16,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:10:16,275 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:10:16,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:10:16,276 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) [2021-12-18 21:10:16,296 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-12-18 21:10:16,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:10:16,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 33 conjunts are in the unsatisfiable core [2021-12-18 21:10:16,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:10:16,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:10:16,612 INFO L388 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 [2021-12-18 21:10:16,734 INFO L388 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 20 treesize of output 12 [2021-12-18 21:10:16,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:10:16,812 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 21:10:16,812 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:10:16,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1001804112] [2021-12-18 21:10:16,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1001804112] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 21:10:16,813 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:10:16,813 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-12-18 21:10:16,813 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814189427] [2021-12-18 21:10:16,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:10:16,813 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-18 21:10:16,813 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:10:16,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-18 21:10:16,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-12-18 21:10:16,814 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand has 17 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 13 states have internal predecessors, (23), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-18 21:10:16,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:10:16,990 INFO L93 Difference]: Finished difference Result 77 states and 78 transitions. [2021-12-18 21:10:16,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-18 21:10:16,991 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 13 states have internal predecessors, (23), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 30 [2021-12-18 21:10:16,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:10:16,991 INFO L225 Difference]: With dead ends: 77 [2021-12-18 21:10:16,991 INFO L226 Difference]: Without dead ends: 77 [2021-12-18 21:10:16,992 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-12-18 21:10:16,992 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 57 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 126 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 21:10:16,992 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 208 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 115 Invalid, 0 Unknown, 126 Unchecked, 0.1s Time] [2021-12-18 21:10:16,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-12-18 21:10:16,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 70. [2021-12-18 21:10:16,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 46 states have (on average 1.4565217391304348) internal successors, (67), 60 states have internal predecessors, (67), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-18 21:10:16,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 77 transitions. [2021-12-18 21:10:16,994 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 77 transitions. Word has length 30 [2021-12-18 21:10:16,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:10:16,994 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 77 transitions. [2021-12-18 21:10:16,995 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 13 states have internal predecessors, (23), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-18 21:10:16,995 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 77 transitions. [2021-12-18 21:10:16,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-18 21:10:16,995 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:10:16,995 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:10:17,008 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-12-18 21:10:17,202 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:10:17,203 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ldv_list_delErr1REQUIRES_VIOLATION === [ldv_list_addErr0REQUIRES_VIOLATION, ldv_list_addErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION (and 22 more)] === [2021-12-18 21:10:17,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:10:17,203 INFO L85 PathProgramCache]: Analyzing trace with hash -2017194108, now seen corresponding path program 1 times [2021-12-18 21:10:17,204 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:10:17,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [559646366] [2021-12-18 21:10:17,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:10:17,204 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:10:17,204 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:10:17,205 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) [2021-12-18 21:10:17,207 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-12-18 21:10:17,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:10:17,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 50 conjunts are in the unsatisfiable core [2021-12-18 21:10:17,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:10:17,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:10:17,570 INFO L388 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 [2021-12-18 21:10:17,577 INFO L388 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 [2021-12-18 21:10:17,737 INFO L388 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 17 treesize of output 9 [2021-12-18 21:10:17,739 INFO L388 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 15 treesize of output 7 [2021-12-18 21:10:17,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:10:17,867 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 21:10:17,867 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:10:17,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [559646366] [2021-12-18 21:10:17,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [559646366] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 21:10:17,867 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:10:17,867 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-12-18 21:10:17,867 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046687918] [2021-12-18 21:10:17,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:10:17,868 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-18 21:10:17,868 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:10:17,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-18 21:10:17,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-12-18 21:10:17,869 INFO L87 Difference]: Start difference. First operand 70 states and 77 transitions. Second operand has 18 states, 16 states have (on average 1.4375) internal successors, (23), 14 states have internal predecessors, (23), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-18 21:10:18,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:10:18,385 INFO L93 Difference]: Finished difference Result 92 states and 93 transitions. [2021-12-18 21:10:18,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-18 21:10:18,386 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 1.4375) internal successors, (23), 14 states have internal predecessors, (23), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 30 [2021-12-18 21:10:18,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:10:18,386 INFO L225 Difference]: With dead ends: 92 [2021-12-18 21:10:18,387 INFO L226 Difference]: Without dead ends: 92 [2021-12-18 21:10:18,387 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-12-18 21:10:18,387 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 55 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 314 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 321 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 156 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-18 21:10:18,388 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 321 Invalid, 473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 314 Invalid, 0 Unknown, 156 Unchecked, 0.4s Time] [2021-12-18 21:10:18,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-12-18 21:10:18,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 74. [2021-12-18 21:10:18,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 50 states have (on average 1.44) internal successors, (72), 63 states have internal predecessors, (72), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-18 21:10:18,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 82 transitions. [2021-12-18 21:10:18,391 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 82 transitions. Word has length 30 [2021-12-18 21:10:18,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:10:18,391 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 82 transitions. [2021-12-18 21:10:18,391 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 1.4375) internal successors, (23), 14 states have internal predecessors, (23), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-18 21:10:18,391 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 82 transitions. [2021-12-18 21:10:18,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-18 21:10:18,395 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:10:18,395 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:10:18,423 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-12-18 21:10:18,603 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:10:18,604 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ldv_list_addErr0REQUIRES_VIOLATION, ldv_list_addErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION (and 22 more)] === [2021-12-18 21:10:18,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:10:18,604 INFO L85 PathProgramCache]: Analyzing trace with hash -2017296135, now seen corresponding path program 1 times [2021-12-18 21:10:18,604 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:10:18,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2025741112] [2021-12-18 21:10:18,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:10:18,605 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:10:18,605 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:10:18,620 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) [2021-12-18 21:10:18,633 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-12-18 21:10:18,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:10:18,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 31 conjunts are in the unsatisfiable core [2021-12-18 21:10:18,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:10:18,901 INFO L388 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 [2021-12-18 21:10:19,016 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 21:10:19,017 INFO L388 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 10 [2021-12-18 21:10:19,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:10:19,061 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 21:10:19,062 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:10:19,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2025741112] [2021-12-18 21:10:19,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2025741112] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 21:10:19,062 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:10:19,062 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-12-18 21:10:19,062 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180619225] [2021-12-18 21:10:19,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:10:19,062 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-18 21:10:19,062 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:10:19,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-18 21:10:19,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-12-18 21:10:19,063 INFO L87 Difference]: Start difference. First operand 74 states and 82 transitions. Second operand has 14 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-18 21:10:19,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:10:19,438 INFO L93 Difference]: Finished difference Result 78 states and 82 transitions. [2021-12-18 21:10:19,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-18 21:10:19,438 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 30 [2021-12-18 21:10:19,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:10:19,439 INFO L225 Difference]: With dead ends: 78 [2021-12-18 21:10:19,439 INFO L226 Difference]: Without dead ends: 78 [2021-12-18 21:10:19,439 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2021-12-18 21:10:19,440 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 64 mSDsluCounter, 412 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 456 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 21:10:19,440 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 456 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-18 21:10:19,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-12-18 21:10:19,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 74. [2021-12-18 21:10:19,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 50 states have (on average 1.42) internal successors, (71), 63 states have internal predecessors, (71), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-18 21:10:19,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 81 transitions. [2021-12-18 21:10:19,441 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 81 transitions. Word has length 30 [2021-12-18 21:10:19,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:10:19,442 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 81 transitions. [2021-12-18 21:10:19,442 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-18 21:10:19,442 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 81 transitions. [2021-12-18 21:10:19,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-12-18 21:10:19,442 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:10:19,442 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:10:19,454 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-12-18 21:10:19,651 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:10:19,652 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ldv_list_delErr4REQUIRES_VIOLATION === [ldv_list_addErr0REQUIRES_VIOLATION, ldv_list_addErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION (and 22 more)] === [2021-12-18 21:10:19,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:10:19,653 INFO L85 PathProgramCache]: Analyzing trace with hash 952738272, now seen corresponding path program 1 times [2021-12-18 21:10:19,653 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:10:19,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1796590945] [2021-12-18 21:10:19,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:10:19,654 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:10:19,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:10:19,655 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) [2021-12-18 21:10:19,656 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-12-18 21:10:19,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:10:19,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 70 conjunts are in the unsatisfiable core [2021-12-18 21:10:19,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:10:19,808 INFO L354 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2021-12-18 21:10:19,808 INFO L388 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 [2021-12-18 21:10:19,845 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 21:10:19,845 INFO L388 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 19 treesize of output 23 [2021-12-18 21:10:19,971 INFO L354 Elim1Store]: treesize reduction 9, result has 64.0 percent of original size [2021-12-18 21:10:19,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 33 [2021-12-18 21:10:20,256 INFO L388 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 [2021-12-18 21:10:20,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:10:20,306 INFO L388 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 0 case distinctions, treesize of input 21 treesize of output 20 [2021-12-18 21:10:20,326 INFO L388 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 [2021-12-18 21:10:20,347 INFO L354 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2021-12-18 21:10:20,348 INFO L388 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 19 treesize of output 26 [2021-12-18 21:10:20,567 INFO L388 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 19 [2021-12-18 21:10:20,667 INFO L388 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 30 treesize of output 18 [2021-12-18 21:10:20,967 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-12-18 21:10:20,968 INFO L388 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 14 [2021-12-18 21:10:21,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:10:21,044 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 21:10:21,044 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:10:21,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1796590945] [2021-12-18 21:10:21,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1796590945] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 21:10:21,045 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:10:21,045 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2021-12-18 21:10:21,045 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527638738] [2021-12-18 21:10:21,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:10:21,045 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-18 21:10:21,046 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:10:21,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-18 21:10:21,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=492, Unknown=0, NotChecked=0, Total=552 [2021-12-18 21:10:21,047 INFO L87 Difference]: Start difference. First operand 74 states and 81 transitions. Second operand has 24 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 18 states have internal predecessors, (26), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-18 21:10:22,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:10:22,025 INFO L93 Difference]: Finished difference Result 77 states and 80 transitions. [2021-12-18 21:10:22,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-18 21:10:22,026 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 18 states have internal predecessors, (26), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 33 [2021-12-18 21:10:22,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:10:22,026 INFO L225 Difference]: With dead ends: 77 [2021-12-18 21:10:22,026 INFO L226 Difference]: Without dead ends: 77 [2021-12-18 21:10:22,027 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=104, Invalid=888, Unknown=0, NotChecked=0, Total=992 [2021-12-18 21:10:22,027 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 45 mSDsluCounter, 343 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 381 SdHoareTripleChecker+Invalid, 483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 295 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 21:10:22,027 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 381 Invalid, 483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 183 Invalid, 0 Unknown, 295 Unchecked, 0.2s Time] [2021-12-18 21:10:22,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-12-18 21:10:22,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 74. [2021-12-18 21:10:22,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 50 states have (on average 1.4) internal successors, (70), 63 states have internal predecessors, (70), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-18 21:10:22,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 80 transitions. [2021-12-18 21:10:22,029 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 80 transitions. Word has length 33 [2021-12-18 21:10:22,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:10:22,029 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 80 transitions. [2021-12-18 21:10:22,029 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 18 states have internal predecessors, (26), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-18 21:10:22,029 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 80 transitions. [2021-12-18 21:10:22,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-12-18 21:10:22,029 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:10:22,030 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:10:22,038 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-12-18 21:10:22,230 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:10:22,230 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ldv_list_delErr5REQUIRES_VIOLATION === [ldv_list_addErr0REQUIRES_VIOLATION, ldv_list_addErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION (and 22 more)] === [2021-12-18 21:10:22,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:10:22,231 INFO L85 PathProgramCache]: Analyzing trace with hash 952738273, now seen corresponding path program 1 times [2021-12-18 21:10:22,231 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:10:22,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [127466203] [2021-12-18 21:10:22,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:10:22,231 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:10:22,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:10:22,232 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) [2021-12-18 21:10:22,234 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-12-18 21:10:22,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:10:22,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 90 conjunts are in the unsatisfiable core [2021-12-18 21:10:22,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:10:22,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:10:22,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:10:22,471 INFO L388 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 [2021-12-18 21:10:22,477 INFO L388 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 5 treesize of output 3 [2021-12-18 21:10:22,609 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 21:10:22,609 INFO L388 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 [2021-12-18 21:10:22,634 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 21:10:22,634 INFO L388 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 [2021-12-18 21:10:22,782 INFO L388 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 7 treesize of output 3 [2021-12-18 21:10:22,785 INFO L388 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 7 treesize of output 3 [2021-12-18 21:10:23,054 INFO L388 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 [2021-12-18 21:10:23,060 INFO L388 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 [2021-12-18 21:10:23,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:10:23,138 INFO L388 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 0 case distinctions, treesize of input 21 treesize of output 20 [2021-12-18 21:10:23,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:10:23,146 INFO L388 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 0 case distinctions, treesize of input 21 treesize of output 20 [2021-12-18 21:10:23,183 INFO L354 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2021-12-18 21:10:23,183 INFO L388 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 19 treesize of output 26 [2021-12-18 21:10:23,222 INFO L354 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2021-12-18 21:10:23,223 INFO L388 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 19 treesize of output 26 [2021-12-18 21:10:23,504 INFO L388 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 19 [2021-12-18 21:10:23,513 INFO L388 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 19 [2021-12-18 21:10:24,117 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 21:10:24,118 INFO L388 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 69 treesize of output 36 [2021-12-18 21:10:24,128 INFO L388 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 13 [2021-12-18 21:10:24,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:10:24,238 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 21:10:24,238 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:10:24,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [127466203] [2021-12-18 21:10:24,238 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [127466203] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 21:10:24,238 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:10:24,238 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2021-12-18 21:10:24,239 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244407230] [2021-12-18 21:10:24,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:10:24,239 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-18 21:10:24,239 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:10:24,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-18 21:10:24,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2021-12-18 21:10:24,240 INFO L87 Difference]: Start difference. First operand 74 states and 80 transitions. Second operand has 23 states, 20 states have (on average 1.3) internal successors, (26), 18 states have internal predecessors, (26), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-18 21:10:24,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:10:24,507 INFO L93 Difference]: Finished difference Result 76 states and 79 transitions. [2021-12-18 21:10:24,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-18 21:10:24,508 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 20 states have (on average 1.3) internal successors, (26), 18 states have internal predecessors, (26), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 33 [2021-12-18 21:10:24,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:10:24,509 INFO L225 Difference]: With dead ends: 76 [2021-12-18 21:10:24,509 INFO L226 Difference]: Without dead ends: 76 [2021-12-18 21:10:24,509 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=72, Invalid=528, Unknown=0, NotChecked=0, Total=600 [2021-12-18 21:10:24,509 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 16 mSDsluCounter, 471 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 508 SdHoareTripleChecker+Invalid, 490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 366 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 21:10:24,509 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 508 Invalid, 490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 124 Invalid, 0 Unknown, 366 Unchecked, 0.2s Time] [2021-12-18 21:10:24,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-12-18 21:10:24,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 74. [2021-12-18 21:10:24,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 50 states have (on average 1.38) internal successors, (69), 63 states have internal predecessors, (69), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-18 21:10:24,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 79 transitions. [2021-12-18 21:10:24,512 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 79 transitions. Word has length 33 [2021-12-18 21:10:24,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:10:24,512 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 79 transitions. [2021-12-18 21:10:24,512 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 20 states have (on average 1.3) internal successors, (26), 18 states have internal predecessors, (26), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-18 21:10:24,512 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 79 transitions. [2021-12-18 21:10:24,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-18 21:10:24,512 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:10:24,512 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:10:24,520 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Ended with exit code 0 [2021-12-18 21:10:24,720 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:10:24,720 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ldv_list_delErr6REQUIRES_VIOLATION === [ldv_list_addErr0REQUIRES_VIOLATION, ldv_list_addErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION (and 22 more)] === [2021-12-18 21:10:24,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:10:24,721 INFO L85 PathProgramCache]: Analyzing trace with hash -529884599, now seen corresponding path program 1 times [2021-12-18 21:10:24,721 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:10:24,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [885173998] [2021-12-18 21:10:24,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:10:24,721 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:10:24,721 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:10:24,722 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) [2021-12-18 21:10:24,724 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-12-18 21:10:24,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:10:24,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 62 conjunts are in the unsatisfiable core [2021-12-18 21:10:24,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:10:24,910 INFO L354 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2021-12-18 21:10:24,911 INFO L388 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 [2021-12-18 21:10:24,992 INFO L354 Elim1Store]: treesize reduction 9, result has 64.0 percent of original size [2021-12-18 21:10:24,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 33 [2021-12-18 21:10:25,252 INFO L388 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 13 treesize of output 9 [2021-12-18 21:10:25,321 INFO L388 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 [2021-12-18 21:10:25,344 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-18 21:10:25,344 INFO L388 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 21 treesize of output 20 [2021-12-18 21:10:25,616 INFO L388 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 20 [2021-12-18 21:10:25,924 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-12-18 21:10:25,924 INFO L388 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 14 [2021-12-18 21:10:25,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:10:25,999 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 21:10:25,999 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:10:25,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [885173998] [2021-12-18 21:10:25,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [885173998] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 21:10:25,999 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:10:25,999 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2021-12-18 21:10:26,000 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871371184] [2021-12-18 21:10:26,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:10:26,000 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-18 21:10:26,000 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:10:26,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-18 21:10:26,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2021-12-18 21:10:26,001 INFO L87 Difference]: Start difference. First operand 74 states and 79 transitions. Second operand has 23 states, 20 states have (on average 1.35) internal successors, (27), 18 states have internal predecessors, (27), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-18 21:10:26,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:10:26,970 INFO L93 Difference]: Finished difference Result 75 states and 78 transitions. [2021-12-18 21:10:26,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-12-18 21:10:26,971 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 20 states have (on average 1.35) internal successors, (27), 18 states have internal predecessors, (27), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 34 [2021-12-18 21:10:26,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:10:26,971 INFO L225 Difference]: With dead ends: 75 [2021-12-18 21:10:26,971 INFO L226 Difference]: Without dead ends: 75 [2021-12-18 21:10:26,972 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=166, Invalid=1316, Unknown=0, NotChecked=0, Total=1482 [2021-12-18 21:10:26,972 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 49 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 341 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 544 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 183 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-18 21:10:26,972 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 272 Invalid, 544 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 341 Invalid, 0 Unknown, 183 Unchecked, 0.4s Time] [2021-12-18 21:10:26,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-12-18 21:10:26,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 74. [2021-12-18 21:10:26,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 50 states have (on average 1.36) internal successors, (68), 63 states have internal predecessors, (68), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-18 21:10:26,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 78 transitions. [2021-12-18 21:10:26,974 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 78 transitions. Word has length 34 [2021-12-18 21:10:26,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:10:26,974 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 78 transitions. [2021-12-18 21:10:26,974 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 20 states have (on average 1.35) internal successors, (27), 18 states have internal predecessors, (27), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-18 21:10:26,974 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 78 transitions. [2021-12-18 21:10:26,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-18 21:10:26,974 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:10:26,975 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:10:26,983 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Ended with exit code 0 [2021-12-18 21:10:27,182 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:10:27,183 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ldv_list_delErr7REQUIRES_VIOLATION === [ldv_list_addErr0REQUIRES_VIOLATION, ldv_list_addErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION (and 22 more)] === [2021-12-18 21:10:27,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:10:27,183 INFO L85 PathProgramCache]: Analyzing trace with hash -529884598, now seen corresponding path program 1 times [2021-12-18 21:10:27,183 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:10:27,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2143727814] [2021-12-18 21:10:27,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:10:27,183 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:10:27,184 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:10:27,184 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) [2021-12-18 21:10:27,186 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-12-18 21:10:27,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:10:27,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 80 conjunts are in the unsatisfiable core [2021-12-18 21:10:27,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:10:27,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:10:27,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:10:27,369 INFO L388 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 5 treesize of output 3 [2021-12-18 21:10:27,373 INFO L388 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 [2021-12-18 21:10:27,469 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 21:10:27,469 INFO L388 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 [2021-12-18 21:10:27,484 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 21:10:27,485 INFO L388 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 [2021-12-18 21:10:27,585 INFO L388 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 7 treesize of output 3 [2021-12-18 21:10:27,814 INFO L388 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 13 treesize of output 9 [2021-12-18 21:10:27,823 INFO L388 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 13 treesize of output 9 [2021-12-18 21:10:27,926 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-18 21:10:27,927 INFO L388 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 34 [2021-12-18 21:10:29,532 INFO L354 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2021-12-18 21:10:29,532 INFO L388 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 21 treesize of output 30 [2021-12-18 21:10:29,884 INFO L388 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 7 treesize of output 3 [2021-12-18 21:10:30,421 INFO L354 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2021-12-18 21:10:30,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 6 new quantified variables, introduced 3 case distinctions, treesize of input 90 treesize of output 54 [2021-12-18 21:10:30,435 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-18 21:10:30,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 18 [2021-12-18 21:10:30,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:10:30,545 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 21:10:30,545 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:10:30,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2143727814] [2021-12-18 21:10:30,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2143727814] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 21:10:30,545 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:10:30,545 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2021-12-18 21:10:30,545 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632196517] [2021-12-18 21:10:30,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:10:30,545 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-18 21:10:30,545 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:10:30,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-18 21:10:30,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-12-18 21:10:30,546 INFO L87 Difference]: Start difference. First operand 74 states and 78 transitions. Second operand has 23 states, 20 states have (on average 1.35) internal successors, (27), 18 states have internal predecessors, (27), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-18 21:10:30,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:10:30,652 INFO L93 Difference]: Finished difference Result 74 states and 77 transitions. [2021-12-18 21:10:30,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-18 21:10:30,653 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 20 states have (on average 1.35) internal successors, (27), 18 states have internal predecessors, (27), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 34 [2021-12-18 21:10:30,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:10:30,654 INFO L225 Difference]: With dead ends: 74 [2021-12-18 21:10:30,654 INFO L226 Difference]: Without dead ends: 74 [2021-12-18 21:10:30,654 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2021-12-18 21:10:30,655 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 18 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 220 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 21:10:30,655 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 244 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 220 Unchecked, 0.1s Time] [2021-12-18 21:10:30,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-12-18 21:10:30,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2021-12-18 21:10:30,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 50 states have (on average 1.34) internal successors, (67), 63 states have internal predecessors, (67), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-18 21:10:30,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 77 transitions. [2021-12-18 21:10:30,656 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 77 transitions. Word has length 34 [2021-12-18 21:10:30,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:10:30,657 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 77 transitions. [2021-12-18 21:10:30,657 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 20 states have (on average 1.35) internal successors, (27), 18 states have internal predecessors, (27), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-18 21:10:30,657 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 77 transitions. [2021-12-18 21:10:30,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-18 21:10:30,657 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:10:30,657 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:10:30,667 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-12-18 21:10:30,857 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:10:30,858 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_FREE === [ldv_list_addErr0REQUIRES_VIOLATION, ldv_list_addErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION (and 22 more)] === [2021-12-18 21:10:30,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:10:30,858 INFO L85 PathProgramCache]: Analyzing trace with hash 457668250, now seen corresponding path program 1 times [2021-12-18 21:10:30,858 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:10:30,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [469678246] [2021-12-18 21:10:30,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:10:30,858 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:10:30,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:10:30,860 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) [2021-12-18 21:10:30,862 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-12-18 21:10:30,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:10:30,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 32 conjunts are in the unsatisfiable core [2021-12-18 21:10:30,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:10:31,238 INFO L388 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 [2021-12-18 21:10:31,438 INFO L388 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 23 treesize of output 11 [2021-12-18 21:10:31,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:10:31,627 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 21:10:31,627 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:10:31,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [469678246] [2021-12-18 21:10:31,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [469678246] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 21:10:31,627 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:10:31,627 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-12-18 21:10:31,627 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60182617] [2021-12-18 21:10:31,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:10:31,628 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-18 21:10:31,628 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:10:31,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-18 21:10:31,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-12-18 21:10:31,628 INFO L87 Difference]: Start difference. First operand 74 states and 77 transitions. Second operand has 16 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 13 states have internal predecessors, (31), 4 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-18 21:10:31,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:10:31,811 INFO L93 Difference]: Finished difference Result 74 states and 76 transitions. [2021-12-18 21:10:31,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-18 21:10:31,811 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 13 states have internal predecessors, (31), 4 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 39 [2021-12-18 21:10:31,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:10:31,812 INFO L225 Difference]: With dead ends: 74 [2021-12-18 21:10:31,812 INFO L226 Difference]: Without dead ends: 74 [2021-12-18 21:10:31,812 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2021-12-18 21:10:31,812 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 15 mSDsluCounter, 306 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 106 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 21:10:31,812 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 348 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 66 Invalid, 0 Unknown, 106 Unchecked, 0.1s Time] [2021-12-18 21:10:31,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-12-18 21:10:31,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2021-12-18 21:10:31,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 50 states have (on average 1.32) internal successors, (66), 63 states have internal predecessors, (66), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-18 21:10:31,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 76 transitions. [2021-12-18 21:10:31,814 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 76 transitions. Word has length 39 [2021-12-18 21:10:31,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:10:31,814 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 76 transitions. [2021-12-18 21:10:31,814 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 13 states have internal predecessors, (31), 4 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-18 21:10:31,814 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 76 transitions. [2021-12-18 21:10:31,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-12-18 21:10:31,815 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:10:31,815 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:10:31,823 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Ended with exit code 0 [2021-12-18 21:10:32,015 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:10:32,015 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE === [ldv_list_addErr0REQUIRES_VIOLATION, ldv_list_addErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION (and 22 more)] === [2021-12-18 21:10:32,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:10:32,016 INFO L85 PathProgramCache]: Analyzing trace with hash 1302813936, now seen corresponding path program 1 times [2021-12-18 21:10:32,016 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:10:32,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [912270539] [2021-12-18 21:10:32,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:10:32,016 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:10:32,016 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:10:32,017 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) [2021-12-18 21:10:32,021 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-12-18 21:10:32,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:10:32,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 31 conjunts are in the unsatisfiable core [2021-12-18 21:10:32,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:10:32,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:10:32,344 INFO L388 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 [2021-12-18 21:10:32,448 INFO L388 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 20 treesize of output 12 [2021-12-18 21:10:32,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:10:32,565 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 21:10:32,566 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:10:32,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [912270539] [2021-12-18 21:10:32,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [912270539] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 21:10:32,566 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:10:32,566 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-12-18 21:10:32,566 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648010372] [2021-12-18 21:10:32,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:10:32,567 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-18 21:10:32,567 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:10:32,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-18 21:10:32,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-12-18 21:10:32,567 INFO L87 Difference]: Start difference. First operand 74 states and 76 transitions. Second operand has 15 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 states have internal predecessors, (32), 4 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-18 21:10:32,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:10:32,649 INFO L93 Difference]: Finished difference Result 74 states and 75 transitions. [2021-12-18 21:10:32,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-18 21:10:32,650 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 states have internal predecessors, (32), 4 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 40 [2021-12-18 21:10:32,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:10:32,651 INFO L225 Difference]: With dead ends: 74 [2021-12-18 21:10:32,651 INFO L226 Difference]: Without dead ends: 74 [2021-12-18 21:10:32,651 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-12-18 21:10:32,652 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 16 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 69 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 21:10:32,653 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 188 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 48 Invalid, 0 Unknown, 69 Unchecked, 0.0s Time] [2021-12-18 21:10:32,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-12-18 21:10:32,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2021-12-18 21:10:32,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 50 states have (on average 1.3) internal successors, (65), 63 states have internal predecessors, (65), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-18 21:10:32,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 75 transitions. [2021-12-18 21:10:32,655 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 75 transitions. Word has length 40 [2021-12-18 21:10:32,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:10:32,656 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 75 transitions. [2021-12-18 21:10:32,656 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 states have internal predecessors, (32), 4 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-18 21:10:32,656 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 75 transitions. [2021-12-18 21:10:32,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-18 21:10:32,656 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:10:32,656 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:10:32,664 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-12-18 21:10:32,865 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:10:32,865 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ldv_list_addErr0REQUIRES_VIOLATION, ldv_list_addErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION (and 22 more)] === [2021-12-18 21:10:32,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:10:32,866 INFO L85 PathProgramCache]: Analyzing trace with hash 1732526430, now seen corresponding path program 1 times [2021-12-18 21:10:32,866 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:10:32,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1341580045] [2021-12-18 21:10:32,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:10:32,866 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:10:32,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:10:32,867 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) [2021-12-18 21:10:32,868 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-12-18 21:10:33,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-18 21:10:33,038 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-18 21:10:33,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-18 21:10:33,176 INFO L133 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2021-12-18 21:10:33,177 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-12-18 21:10:33,177 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr5REQUIRES_VIOLATION (25 of 26 remaining) [2021-12-18 21:10:33,178 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ldv_list_addErr0REQUIRES_VIOLATION (24 of 26 remaining) [2021-12-18 21:10:33,178 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ldv_list_addErr1REQUIRES_VIOLATION (23 of 26 remaining) [2021-12-18 21:10:33,178 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATION (22 of 26 remaining) [2021-12-18 21:10:33,179 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATION (21 of 26 remaining) [2021-12-18 21:10:33,179 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (20 of 26 remaining) [2021-12-18 21:10:33,179 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_FREE (19 of 26 remaining) [2021-12-18 21:10:33,179 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE (18 of 26 remaining) [2021-12-18 21:10:33,179 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATION (17 of 26 remaining) [2021-12-18 21:10:33,179 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK (16 of 26 remaining) [2021-12-18 21:10:33,179 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ldv_list_delErr0REQUIRES_VIOLATION (15 of 26 remaining) [2021-12-18 21:10:33,179 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ldv_list_delErr1REQUIRES_VIOLATION (14 of 26 remaining) [2021-12-18 21:10:33,179 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ldv_list_delErr2REQUIRES_VIOLATION (13 of 26 remaining) [2021-12-18 21:10:33,179 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ldv_list_delErr3REQUIRES_VIOLATION (12 of 26 remaining) [2021-12-18 21:10:33,179 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ldv_list_delErr4REQUIRES_VIOLATION (11 of 26 remaining) [2021-12-18 21:10:33,179 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ldv_list_delErr5REQUIRES_VIOLATION (10 of 26 remaining) [2021-12-18 21:10:33,179 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ldv_list_delErr6REQUIRES_VIOLATION (9 of 26 remaining) [2021-12-18 21:10:33,179 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ldv_list_delErr7REQUIRES_VIOLATION (8 of 26 remaining) [2021-12-18 21:10:33,180 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location __ldv_list_addErr0REQUIRES_VIOLATION (7 of 26 remaining) [2021-12-18 21:10:33,180 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location __ldv_list_addErr1REQUIRES_VIOLATION (6 of 26 remaining) [2021-12-18 21:10:33,180 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location __ldv_list_addErr2REQUIRES_VIOLATION (5 of 26 remaining) [2021-12-18 21:10:33,180 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location __ldv_list_addErr3REQUIRES_VIOLATION (4 of 26 remaining) [2021-12-18 21:10:33,180 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location __ldv_list_addErr4REQUIRES_VIOLATION (3 of 26 remaining) [2021-12-18 21:10:33,180 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location __ldv_list_addErr5REQUIRES_VIOLATION (2 of 26 remaining) [2021-12-18 21:10:33,180 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location __ldv_list_addErr6REQUIRES_VIOLATION (1 of 26 remaining) [2021-12-18 21:10:33,180 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location __ldv_list_addErr7REQUIRES_VIOLATION (0 of 26 remaining) [2021-12-18 21:10:33,201 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Ended with exit code 0 [2021-12-18 21:10:33,380 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:10:33,383 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:10:33,385 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-18 21:10:33,422 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.12 09:10:33 BoogieIcfgContainer [2021-12-18 21:10:33,423 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-18 21:10:33,423 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-18 21:10:33,423 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-18 21:10:33,423 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-18 21:10:33,423 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 09:10:04" (3/4) ... [2021-12-18 21:10:33,424 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-12-18 21:10:33,471 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-12-18 21:10:33,471 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-18 21:10:33,471 INFO L158 Benchmark]: Toolchain (without parser) took 30130.49ms. Allocated memory was 65.0MB in the beginning and 104.9MB in the end (delta: 39.8MB). Free memory was 44.0MB in the beginning and 36.8MB in the end (delta: 7.2MB). Peak memory consumption was 46.5MB. Max. memory is 16.1GB. [2021-12-18 21:10:33,471 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 65.0MB. Free memory was 47.0MB in the beginning and 46.9MB in the end (delta: 83.9kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-18 21:10:33,471 INFO L158 Benchmark]: CACSL2BoogieTranslator took 486.78ms. Allocated memory was 65.0MB in the beginning and 79.7MB in the end (delta: 14.7MB). Free memory was 43.8MB in the beginning and 60.7MB in the end (delta: -16.9MB). Peak memory consumption was 16.7MB. Max. memory is 16.1GB. [2021-12-18 21:10:33,472 INFO L158 Benchmark]: Boogie Procedure Inliner took 36.81ms. Allocated memory is still 79.7MB. Free memory was 60.7MB in the beginning and 58.3MB in the end (delta: 2.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-18 21:10:33,472 INFO L158 Benchmark]: Boogie Preprocessor took 22.11ms. Allocated memory is still 79.7MB. Free memory was 58.3MB in the beginning and 56.5MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-18 21:10:33,472 INFO L158 Benchmark]: RCFGBuilder took 442.80ms. Allocated memory is still 79.7MB. Free memory was 56.5MB in the beginning and 39.7MB in the end (delta: 16.8MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2021-12-18 21:10:33,472 INFO L158 Benchmark]: TraceAbstraction took 29086.91ms. Allocated memory was 79.7MB in the beginning and 104.9MB in the end (delta: 25.2MB). Free memory was 39.1MB in the beginning and 40.0MB in the end (delta: -904.8kB). Peak memory consumption was 23.5MB. Max. memory is 16.1GB. [2021-12-18 21:10:33,472 INFO L158 Benchmark]: Witness Printer took 47.80ms. Allocated memory is still 104.9MB. Free memory was 40.0MB in the beginning and 36.8MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-12-18 21:10:33,473 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 65.0MB. Free memory was 47.0MB in the beginning and 46.9MB in the end (delta: 83.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 486.78ms. Allocated memory was 65.0MB in the beginning and 79.7MB in the end (delta: 14.7MB). Free memory was 43.8MB in the beginning and 60.7MB in the end (delta: -16.9MB). Peak memory consumption was 16.7MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 36.81ms. Allocated memory is still 79.7MB. Free memory was 60.7MB in the beginning and 58.3MB in the end (delta: 2.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 22.11ms. Allocated memory is still 79.7MB. Free memory was 58.3MB in the beginning and 56.5MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 442.80ms. Allocated memory is still 79.7MB. Free memory was 56.5MB in the beginning and 39.7MB in the end (delta: 16.8MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * TraceAbstraction took 29086.91ms. Allocated memory was 79.7MB in the beginning and 104.9MB in the end (delta: 25.2MB). Free memory was 39.1MB in the beginning and 40.0MB in the end (delta: -904.8kB). Peak memory consumption was 23.5MB. Max. memory is 16.1GB. * Witness Printer took 47.80ms. Allocated memory is still 104.9MB. Free memory was 40.0MB in the beginning and 36.8MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 769]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L569] struct ldv_list_head ldv_global_msg_list = { &(ldv_global_msg_list), &(ldv_global_msg_list) }; VAL [ldv_global_msg_list={1:0}] [L780] CALL entry_point() [L775] struct ldv_list_head list_14 = { &(list_14), &(list_14) }; [L776] CALL alloc_14(&list_14) [L762] CALL, EXPR ldv_malloc(sizeof(struct A14)) VAL [\old(size)=12, ldv_global_msg_list={1:0}] [L526] COND TRUE __VERIFIER_nondet_int() [L527] return malloc(size); [L762] RET, EXPR ldv_malloc(sizeof(struct A14)) VAL [ldv_global_msg_list={1:0}, ldv_malloc(sizeof(struct A14))={3:0}, list={7:0}, list={7:0}] [L762] struct A14 *p = (struct A14 *)ldv_malloc(sizeof(struct A14)); [L763] COND TRUE \read(*p) VAL [ldv_global_msg_list={1:0}, list={7:0}, list={7:0}, p={3:0}] [L764] CALL ldv_list_add(&p->list, list) VAL [head={7:0}, ldv_global_msg_list={1:0}, new={3:4}] [L559] EXPR head->next VAL [head={7:0}, head={7:0}, head->next={7:0}, ldv_global_msg_list={1:0}, new={3:4}, new={3:4}] [L559] CALL __ldv_list_add(new, head, head->next) VAL [ldv_global_msg_list={1:0}, new={3:4}, next={7:0}, prev={7:0}] [L547] next->prev = new VAL [ldv_global_msg_list={1:0}, new={3:4}, new={3:4}, next={7:0}, next={7:0}, prev={7:0}, prev={7:0}] [L548] new->next = next VAL [ldv_global_msg_list={1:0}, new={3:4}, new={3:4}, next={7:0}, next={7:0}, prev={7:0}, prev={7:0}] [L549] new->prev = prev VAL [ldv_global_msg_list={1:0}, new={3:4}, new={3:4}, next={7:0}, next={7:0}, prev={7:0}, prev={7:0}] [L550] prev->next = new VAL [ldv_global_msg_list={1:0}, new={3:4}, new={3:4}, next={7:0}, next={7:0}, prev={7:0}, prev={7:0}] [L559] RET __ldv_list_add(new, head, head->next) VAL [head={7:0}, head={7:0}, head->next={7:0}, ldv_global_msg_list={1:0}, new={3:4}, new={3:4}] [L764] RET ldv_list_add(&p->list, list) VAL [ldv_global_msg_list={1:0}, list={7:0}, list={7:0}, p={3:0}] [L776] RET alloc_14(&list_14) [L777] CALL free_14(&list_14) [L768] struct A14 *p; VAL [ldv_global_msg_list={1:0}, plist={7:0}, plist={7:0}] [L769] EXPR (plist)->next VAL [(plist)->next={3:4}, ldv_global_msg_list={1:0}, plist={7:0}, plist={7:0}] [L769] const typeof( ((typeof(*p) *)0)->list ) *__mptr = ((plist)->next); [L769] p = ({ const typeof( ((typeof(*p) *)0)->list ) *__mptr = ((plist)->next); (typeof(*p) *)( (char *)__mptr - ((size_t) &((typeof(*p) *)0)->list) );}) VAL [__mptr={3:4}, ldv_global_msg_list={1:0}, p={3:0}, plist={7:0}, plist={7:0}] [L769] COND TRUE &p->list != (plist) VAL [__mptr={3:4}, ldv_global_msg_list={1:0}, p={3:0}, plist={7:0}, plist={7:0}] [L770] CALL ldv_list_del(&p->list) VAL [ldv_global_msg_list={1:0}] [L567] EXPR entry->prev VAL [entry={3:4}, entry={3:4}, entry->prev={7:0}, ldv_global_msg_list={1:0}] [L567] EXPR entry->next VAL [entry={3:4}, entry={3:4}, entry->next={7:0}, entry->prev={7:0}, ldv_global_msg_list={1:0}] [L567] CALL __ldv_list_del(entry->prev, entry->next) [L554] next->prev = prev VAL [ldv_global_msg_list={1:0}, next={7:0}, next={7:0}, prev={7:0}, prev={7:0}] [L555] prev->next = next VAL [ldv_global_msg_list={1:0}, next={7:0}, next={7:0}, prev={7:0}, prev={7:0}] [L567] RET __ldv_list_del(entry->prev, entry->next) [L770] RET ldv_list_del(&p->list) VAL [__mptr={3:4}, ldv_global_msg_list={1:0}, p={3:0}, plist={7:0}, plist={7:0}] [L771] free(p) VAL [__mptr={3:4}, ldv_global_msg_list={1:0}, p={3:0}, plist={7:0}, plist={7:0}] [L771] free(p) VAL [__mptr={3:4}, ldv_global_msg_list={1:0}, p={3:0}, plist={7:0}, plist={7:0}] [L771] free(p) [L769] (p)->list.next - UnprovableResult [Line: 559]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 559]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 769]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 769]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 771]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 771]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 771]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 769]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 779]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: 567]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 567]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 567]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 567]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 554]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 554]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 555]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 555]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 547]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 547]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 548]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 548]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 549]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 549]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 550]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 550]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 73 locations, 26 error locations. Started 1 CEGAR loops. OverallTime: 29.0s, OverallIterations: 26, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 6.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1015 SdHoareTripleChecker+Valid, 4.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 984 mSDsluCounter, 6616 SdHoareTripleChecker+Invalid, 3.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 1891 IncrementalHoareTripleChecker+Unchecked, 5367 mSDsCounter, 101 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 3487 IncrementalHoareTripleChecker+Invalid, 5479 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 101 mSolverCounterUnsat, 1249 mSDtfsCounter, 3487 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 608 GetRequests, 287 SyntacticMatches, 9 SemanticMatches, 312 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 627 ImplicationChecksByTransitivity, 9.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=86occurred in iteration=6, InterpolantAutomatonStates: 304, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 25 MinimizatonAttempts, 198 StatesRemovedByMinimization, 18 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 1.0s SatisfiabilityAnalysisTime, 14.2s InterpolantComputationTime, 596 NumberOfCodeBlocks, 596 NumberOfCodeBlocksAsserted, 26 NumberOfCheckSat, 530 ConstructedInterpolants, 179 QuantifiedInterpolants, 7406 SizeOfPredicates, 334 NumberOfNonLiveVariables, 3259 ConjunctsInSsa, 673 ConjunctsInUnsatCore, 25 InterpolantComputations, 25 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-12-18 21:10:33,506 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(valid-deref)