./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/ldv-memsafety/memleaks_test17_2-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 791161d1 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_test17_2-2.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 bb0a504b43b0de742fcc89ebbe9d313056bb1824edece6c56238a649b6f48626 --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-23 06:11:26,237 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-23 06:11:26,239 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-23 06:11:26,278 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-23 06:11:26,279 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-23 06:11:26,280 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-23 06:11:26,282 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-23 06:11:26,284 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-23 06:11:26,285 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-23 06:11:26,289 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-23 06:11:26,290 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-23 06:11:26,292 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-23 06:11:26,292 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-23 06:11:26,294 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-23 06:11:26,295 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-23 06:11:26,298 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-23 06:11:26,299 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-23 06:11:26,300 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-23 06:11:26,302 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-23 06:11:26,307 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-23 06:11:26,309 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-23 06:11:26,311 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-23 06:11:26,311 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-23 06:11:26,312 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-23 06:11:26,314 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-23 06:11:26,319 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-23 06:11:26,320 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-23 06:11:26,320 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-23 06:11:26,321 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-23 06:11:26,321 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-23 06:11:26,322 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-23 06:11:26,322 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-23 06:11:26,324 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-23 06:11:26,324 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-23 06:11:26,325 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-23 06:11:26,325 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-23 06:11:26,325 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-23 06:11:26,326 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-23 06:11:26,326 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-23 06:11:26,326 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-23 06:11:26,327 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-23 06:11:26,329 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-23 06:11:26,330 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-07-23 06:11:26,356 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-23 06:11:26,357 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-23 06:11:26,357 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-23 06:11:26,357 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-23 06:11:26,358 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-23 06:11:26,358 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-23 06:11:26,359 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-23 06:11:26,359 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-23 06:11:26,359 INFO L138 SettingsManager]: * Use SBE=true [2022-07-23 06:11:26,360 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-23 06:11:26,360 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-23 06:11:26,360 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-23 06:11:26,360 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-23 06:11:26,361 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-23 06:11:26,361 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-23 06:11:26,361 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-23 06:11:26,361 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-23 06:11:26,361 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-23 06:11:26,361 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-23 06:11:26,361 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-23 06:11:26,362 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-23 06:11:26,362 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-23 06:11:26,362 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-23 06:11:26,362 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-23 06:11:26,362 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-23 06:11:26,362 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-23 06:11:26,363 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-23 06:11:26,363 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-23 06:11:26,363 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-23 06:11:26,363 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-23 06:11:26,364 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bb0a504b43b0de742fcc89ebbe9d313056bb1824edece6c56238a649b6f48626 [2022-07-23 06:11:26,609 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-23 06:11:26,626 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-23 06:11:26,628 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-23 06:11:26,629 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-23 06:11:26,630 INFO L275 PluginConnector]: CDTParser initialized [2022-07-23 06:11:26,631 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-memsafety/memleaks_test17_2-2.i [2022-07-23 06:11:26,682 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fc62e38b7/26b6d558920b4e4481bb9c77d64cbcbb/FLAG9ff7053cd [2022-07-23 06:11:27,166 INFO L306 CDTParser]: Found 1 translation units. [2022-07-23 06:11:27,167 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-memsafety/memleaks_test17_2-2.i [2022-07-23 06:11:27,176 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fc62e38b7/26b6d558920b4e4481bb9c77d64cbcbb/FLAG9ff7053cd [2022-07-23 06:11:27,189 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fc62e38b7/26b6d558920b4e4481bb9c77d64cbcbb [2022-07-23 06:11:27,191 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-23 06:11:27,192 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-23 06:11:27,194 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-23 06:11:27,194 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-23 06:11:27,196 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-23 06:11:27,197 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.07 06:11:27" (1/1) ... [2022-07-23 06:11:27,198 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@498d1832 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 06:11:27, skipping insertion in model container [2022-07-23 06:11:27,198 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.07 06:11:27" (1/1) ... [2022-07-23 06:11:27,203 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-23 06:11:27,247 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-23 06:11:27,552 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-23 06:11:27,562 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2022-07-23 06:11:27,563 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@4eb7a63c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 06:11:27, skipping insertion in model container [2022-07-23 06:11:27,563 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-23 06:11:27,564 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-07-23 06:11:27,565 INFO L158 Benchmark]: Toolchain (without parser) took 372.26ms. Allocated memory is still 98.6MB. Free memory was 65.1MB in the beginning and 68.6MB in the end (delta: -3.5MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2022-07-23 06:11:27,565 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 98.6MB. Free memory was 53.0MB in the beginning and 53.0MB in the end (delta: 47.9kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-23 06:11:27,566 INFO L158 Benchmark]: CACSL2BoogieTranslator took 369.52ms. Allocated memory is still 98.6MB. Free memory was 64.9MB in the beginning and 68.6MB in the end (delta: -3.7MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2022-07-23 06:11:27,567 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 98.6MB. Free memory was 53.0MB in the beginning and 53.0MB in the end (delta: 47.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 369.52ms. Allocated memory is still 98.6MB. Free memory was 64.9MB in the beginning and 68.6MB in the end (delta: -3.7MB). Peak memory consumption was 6.3MB. 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 of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/ldv-memsafety/memleaks_test17_2-2.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 bb0a504b43b0de742fcc89ebbe9d313056bb1824edece6c56238a649b6f48626 --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-23 06:11:29,221 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-23 06:11:29,223 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-23 06:11:29,258 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-23 06:11:29,258 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-23 06:11:29,260 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-23 06:11:29,262 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-23 06:11:29,265 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-23 06:11:29,273 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-23 06:11:29,274 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-23 06:11:29,275 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-23 06:11:29,277 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-23 06:11:29,278 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-23 06:11:29,278 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-23 06:11:29,279 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-23 06:11:29,282 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-23 06:11:29,282 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-23 06:11:29,285 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-23 06:11:29,287 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-23 06:11:29,289 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-23 06:11:29,291 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-23 06:11:29,292 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-23 06:11:29,293 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-23 06:11:29,294 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-23 06:11:29,295 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-23 06:11:29,299 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-23 06:11:29,302 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-23 06:11:29,302 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-23 06:11:29,303 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-23 06:11:29,303 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-23 06:11:29,303 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-23 06:11:29,304 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-23 06:11:29,305 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-23 06:11:29,306 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-23 06:11:29,307 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-23 06:11:29,307 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-23 06:11:29,308 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-23 06:11:29,308 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-23 06:11:29,308 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-23 06:11:29,309 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-23 06:11:29,309 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-23 06:11:29,311 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-23 06:11:29,316 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2022-07-23 06:11:29,338 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-23 06:11:29,339 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-23 06:11:29,339 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-23 06:11:29,339 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-23 06:11:29,340 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-23 06:11:29,340 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-23 06:11:29,340 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-23 06:11:29,341 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-23 06:11:29,341 INFO L138 SettingsManager]: * Use SBE=true [2022-07-23 06:11:29,341 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-23 06:11:29,342 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-23 06:11:29,342 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-23 06:11:29,342 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-23 06:11:29,342 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-23 06:11:29,342 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-23 06:11:29,342 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-23 06:11:29,343 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-23 06:11:29,343 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-23 06:11:29,343 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-23 06:11:29,343 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-23 06:11:29,343 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-07-23 06:11:29,343 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-07-23 06:11:29,343 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-23 06:11:29,344 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-23 06:11:29,344 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-23 06:11:29,344 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-23 06:11:29,344 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-23 06:11:29,344 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-23 06:11:29,344 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-23 06:11:29,344 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-23 06:11:29,345 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-07-23 06:11:29,345 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-07-23 06:11:29,345 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-07-23 06:11:29,345 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bb0a504b43b0de742fcc89ebbe9d313056bb1824edece6c56238a649b6f48626 [2022-07-23 06:11:29,641 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-23 06:11:29,664 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-23 06:11:29,666 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-23 06:11:29,667 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-23 06:11:29,668 INFO L275 PluginConnector]: CDTParser initialized [2022-07-23 06:11:29,669 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-memsafety/memleaks_test17_2-2.i [2022-07-23 06:11:29,730 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b231ea957/1b39bf5789e241a8842866a513286c37/FLAG96607c632 [2022-07-23 06:11:30,217 INFO L306 CDTParser]: Found 1 translation units. [2022-07-23 06:11:30,218 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-memsafety/memleaks_test17_2-2.i [2022-07-23 06:11:30,232 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b231ea957/1b39bf5789e241a8842866a513286c37/FLAG96607c632 [2022-07-23 06:11:30,540 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b231ea957/1b39bf5789e241a8842866a513286c37 [2022-07-23 06:11:30,542 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-23 06:11:30,544 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-23 06:11:30,545 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-23 06:11:30,545 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-23 06:11:30,547 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-23 06:11:30,548 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.07 06:11:30" (1/1) ... [2022-07-23 06:11:30,549 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e2c70a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 06:11:30, skipping insertion in model container [2022-07-23 06:11:30,549 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.07 06:11:30" (1/1) ... [2022-07-23 06:11:30,555 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-23 06:11:30,596 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-23 06:11:30,973 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-23 06:11:30,990 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-07-23 06:11:30,997 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-23 06:11:31,042 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-23 06:11:31,055 INFO L203 MainTranslator]: Completed pre-run [2022-07-23 06:11:31,110 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-23 06:11:31,189 INFO L208 MainTranslator]: Completed translation [2022-07-23 06:11:31,190 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 06:11:31 WrapperNode [2022-07-23 06:11:31,190 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-23 06:11:31,192 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-23 06:11:31,192 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-23 06:11:31,192 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-23 06:11:31,199 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 06:11:31" (1/1) ... [2022-07-23 06:11:31,234 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 06:11:31" (1/1) ... [2022-07-23 06:11:31,258 INFO L137 Inliner]: procedures = 167, calls = 80, calls flagged for inlining = 24, calls inlined = 6, statements flattened = 99 [2022-07-23 06:11:31,259 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-23 06:11:31,260 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-23 06:11:31,260 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-23 06:11:31,260 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-23 06:11:31,266 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 06:11:31" (1/1) ... [2022-07-23 06:11:31,267 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 06:11:31" (1/1) ... [2022-07-23 06:11:31,279 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 06:11:31" (1/1) ... [2022-07-23 06:11:31,285 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 06:11:31" (1/1) ... [2022-07-23 06:11:31,294 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 06:11:31" (1/1) ... [2022-07-23 06:11:31,297 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 06:11:31" (1/1) ... [2022-07-23 06:11:31,299 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 06:11:31" (1/1) ... [2022-07-23 06:11:31,302 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-23 06:11:31,303 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-23 06:11:31,303 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-23 06:11:31,303 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-23 06:11:31,304 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 06:11:31" (1/1) ... [2022-07-23 06:11:31,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-23 06:11:31,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 06:11:31,329 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-23 06:11:31,380 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-23 06:11:31,414 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-07-23 06:11:31,414 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-07-23 06:11:31,414 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-23 06:11:31,414 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-23 06:11:31,414 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-23 06:11:31,415 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-23 06:11:31,415 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-23 06:11:31,416 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-07-23 06:11:31,416 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-23 06:11:31,416 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-23 06:11:31,567 INFO L234 CfgBuilder]: Building ICFG [2022-07-23 06:11:31,568 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-23 06:11:31,843 INFO L275 CfgBuilder]: Performing block encoding [2022-07-23 06:11:31,848 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-23 06:11:31,848 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-07-23 06:11:31,850 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.07 06:11:31 BoogieIcfgContainer [2022-07-23 06:11:31,850 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-23 06:11:31,851 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-23 06:11:31,851 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-23 06:11:31,853 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-23 06:11:31,854 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.07 06:11:30" (1/3) ... [2022-07-23 06:11:31,854 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3da0eb72 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.07 06:11:31, skipping insertion in model container [2022-07-23 06:11:31,854 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 06:11:31" (2/3) ... [2022-07-23 06:11:31,855 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3da0eb72 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.07 06:11:31, skipping insertion in model container [2022-07-23 06:11:31,855 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.07 06:11:31" (3/3) ... [2022-07-23 06:11:31,856 INFO L111 eAbstractionObserver]: Analyzing ICFG memleaks_test17_2-2.i [2022-07-23 06:11:31,880 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-23 06:11:31,881 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 20 error locations. [2022-07-23 06:11:31,925 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-23 06:11:31,930 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@24cf0252, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@78b5aa35 [2022-07-23 06:11:31,930 INFO L358 AbstractCegarLoop]: Starting to check reachability of 20 error locations. [2022-07-23 06:11:31,934 INFO L276 IsEmpty]: Start isEmpty. Operand has 67 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 63 states have internal predecessors, (76), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-23 06:11:31,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-23 06:11:31,940 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:11:31,940 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:11:31,941 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-23 06:11:31,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:11:31,946 INFO L85 PathProgramCache]: Analyzing trace with hash 858994893, now seen corresponding path program 1 times [2022-07-23 06:11:31,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:11:31,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1495688265] [2022-07-23 06:11:31,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:11:31,957 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:11:31,957 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:11:31,959 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:11:31,960 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-07-23 06:11:32,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:11:32,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 1 conjunts are in the unsatisfiable core [2022-07-23 06:11:32,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:11:32,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 06:11:32,066 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 06:11:32,066 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:11:32,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1495688265] [2022-07-23 06:11:32,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1495688265] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 06:11:32,068 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 06:11:32,068 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-23 06:11:32,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207980811] [2022-07-23 06:11:32,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 06:11:32,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-23 06:11:32,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:11:32,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-23 06:11:32,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-23 06:11:32,098 INFO L87 Difference]: Start difference. First operand has 67 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 63 states have internal predecessors, (76), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 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) [2022-07-23 06:11:32,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:11:32,117 INFO L93 Difference]: Finished difference Result 67 states and 75 transitions. [2022-07-23 06:11:32,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-23 06:11:32,119 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 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 14 [2022-07-23 06:11:32,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:11:32,124 INFO L225 Difference]: With dead ends: 67 [2022-07-23 06:11:32,125 INFO L226 Difference]: Without dead ends: 65 [2022-07-23 06:11:32,126 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-23 06:11:32,131 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 06:11:32,133 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 06:11:32,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-07-23 06:11:32,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2022-07-23 06:11:32,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 42 states have (on average 1.6428571428571428) internal successors, (69), 61 states have internal predecessors, (69), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-23 06:11:32,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 73 transitions. [2022-07-23 06:11:32,174 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 73 transitions. Word has length 14 [2022-07-23 06:11:32,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:11:32,174 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 73 transitions. [2022-07-23 06:11:32,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 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) [2022-07-23 06:11:32,175 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 73 transitions. [2022-07-23 06:11:32,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-23 06:11:32,177 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:11:32,177 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:11:32,203 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-07-23 06:11:32,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:11:32,408 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-23 06:11:32,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:11:32,409 INFO L85 PathProgramCache]: Analyzing trace with hash 465967883, now seen corresponding path program 1 times [2022-07-23 06:11:32,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:11:32,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [435641964] [2022-07-23 06:11:32,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:11:32,411 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:11:32,411 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:11:32,413 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:11:32,414 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-07-23 06:11:32,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:11:32,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-23 06:11:32,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:11:32,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 06:11:32,486 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 06:11:32,487 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:11:32,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [435641964] [2022-07-23 06:11:32,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [435641964] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 06:11:32,487 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 06:11:32,487 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-23 06:11:32,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365446606] [2022-07-23 06:11:32,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 06:11:32,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-23 06:11:32,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:11:32,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-23 06:11:32,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-23 06:11:32,490 INFO L87 Difference]: Start difference. First operand 65 states and 73 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 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) [2022-07-23 06:11:32,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:11:32,570 INFO L93 Difference]: Finished difference Result 121 states and 137 transitions. [2022-07-23 06:11:32,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-23 06:11:32,571 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 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 14 [2022-07-23 06:11:32,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:11:32,573 INFO L225 Difference]: With dead ends: 121 [2022-07-23 06:11:32,573 INFO L226 Difference]: Without dead ends: 121 [2022-07-23 06:11:32,573 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-23 06:11:32,574 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 57 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 06:11:32,575 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 249 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 06:11:32,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-07-23 06:11:32,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 69. [2022-07-23 06:11:32,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 45 states have (on average 1.6) internal successors, (72), 64 states have internal predecessors, (72), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-23 06:11:32,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 78 transitions. [2022-07-23 06:11:32,581 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 78 transitions. Word has length 14 [2022-07-23 06:11:32,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:11:32,582 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 78 transitions. [2022-07-23 06:11:32,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 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) [2022-07-23 06:11:32,582 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 78 transitions. [2022-07-23 06:11:32,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-23 06:11:32,583 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:11:32,583 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:11:32,607 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-07-23 06:11:32,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:11:32,790 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-23 06:11:32,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:11:32,791 INFO L85 PathProgramCache]: Analyzing trace with hash 465866789, now seen corresponding path program 1 times [2022-07-23 06:11:32,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:11:32,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [83121644] [2022-07-23 06:11:32,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:11:32,792 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:11:32,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:11:32,793 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:11:32,795 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-07-23 06:11:32,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:11:32,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-23 06:11:32,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:11:32,865 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-23 06:11:32,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 06:11:32,886 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 06:11:32,886 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:11:32,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [83121644] [2022-07-23 06:11:32,886 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [83121644] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 06:11:32,886 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 06:11:32,886 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-23 06:11:32,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185260096] [2022-07-23 06:11:32,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 06:11:32,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-23 06:11:32,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:11:32,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-23 06:11:32,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-23 06:11:32,888 INFO L87 Difference]: Start difference. First operand 69 states and 78 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 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) [2022-07-23 06:11:33,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:11:33,040 INFO L93 Difference]: Finished difference Result 93 states and 107 transitions. [2022-07-23 06:11:33,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-23 06:11:33,041 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 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 14 [2022-07-23 06:11:33,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:11:33,042 INFO L225 Difference]: With dead ends: 93 [2022-07-23 06:11:33,042 INFO L226 Difference]: Without dead ends: 93 [2022-07-23 06:11:33,042 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-23 06:11:33,043 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 24 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 06:11:33,043 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 188 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 06:11:33,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-07-23 06:11:33,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 80. [2022-07-23 06:11:33,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 56 states have (on average 1.5892857142857142) internal successors, (89), 75 states have internal predecessors, (89), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-23 06:11:33,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 95 transitions. [2022-07-23 06:11:33,050 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 95 transitions. Word has length 14 [2022-07-23 06:11:33,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:11:33,050 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 95 transitions. [2022-07-23 06:11:33,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 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) [2022-07-23 06:11:33,051 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 95 transitions. [2022-07-23 06:11:33,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-23 06:11:33,051 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:11:33,051 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:11:33,061 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2022-07-23 06:11:33,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:11:33,259 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-23 06:11:33,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:11:33,260 INFO L85 PathProgramCache]: Analyzing trace with hash 465866790, now seen corresponding path program 1 times [2022-07-23 06:11:33,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:11:33,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [449642829] [2022-07-23 06:11:33,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:11:33,260 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:11:33,260 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:11:33,262 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:11:33,265 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-07-23 06:11:33,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:11:33,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-23 06:11:33,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:11:33,341 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-23 06:11:33,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 06:11:33,505 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 06:11:33,506 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:11:33,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [449642829] [2022-07-23 06:11:33,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [449642829] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 06:11:33,506 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 06:11:33,506 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-07-23 06:11:33,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282526286] [2022-07-23 06:11:33,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 06:11:33,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-23 06:11:33,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:11:33,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-23 06:11:33,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-07-23 06:11:33,507 INFO L87 Difference]: Start difference. First operand 80 states and 95 transitions. Second operand has 11 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 10 states have internal predecessors, (12), 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) [2022-07-23 06:11:33,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:11:33,846 INFO L93 Difference]: Finished difference Result 117 states and 138 transitions. [2022-07-23 06:11:33,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-23 06:11:33,847 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 10 states have internal predecessors, (12), 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 14 [2022-07-23 06:11:33,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:11:33,848 INFO L225 Difference]: With dead ends: 117 [2022-07-23 06:11:33,848 INFO L226 Difference]: Without dead ends: 117 [2022-07-23 06:11:33,848 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2022-07-23 06:11:33,849 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 221 mSDsluCounter, 352 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 429 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-23 06:11:33,849 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [221 Valid, 429 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 207 Invalid, 0 Unknown, 39 Unchecked, 0.2s Time] [2022-07-23 06:11:33,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-07-23 06:11:33,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 100. [2022-07-23 06:11:33,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 76 states have (on average 1.5657894736842106) internal successors, (119), 95 states have internal predecessors, (119), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-23 06:11:33,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 125 transitions. [2022-07-23 06:11:33,856 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 125 transitions. Word has length 14 [2022-07-23 06:11:33,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:11:33,856 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 125 transitions. [2022-07-23 06:11:33,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 10 states have internal predecessors, (12), 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) [2022-07-23 06:11:33,857 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 125 transitions. [2022-07-23 06:11:33,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-23 06:11:33,858 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:11:33,858 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:11:33,884 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2022-07-23 06:11:34,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:11:34,065 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-23 06:11:34,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:11:34,065 INFO L85 PathProgramCache]: Analyzing trace with hash 1353471564, now seen corresponding path program 1 times [2022-07-23 06:11:34,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:11:34,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [221687552] [2022-07-23 06:11:34,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:11:34,066 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:11:34,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:11:34,069 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:11:34,072 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-07-23 06:11:34,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:11:34,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-23 06:11:34,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:11:34,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 06:11:34,153 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 06:11:34,153 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:11:34,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [221687552] [2022-07-23 06:11:34,153 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [221687552] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 06:11:34,153 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 06:11:34,154 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-23 06:11:34,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986263304] [2022-07-23 06:11:34,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 06:11:34,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-23 06:11:34,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:11:34,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-23 06:11:34,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-23 06:11:34,155 INFO L87 Difference]: Start difference. First operand 100 states and 125 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 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) [2022-07-23 06:11:34,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:11:34,259 INFO L93 Difference]: Finished difference Result 144 states and 174 transitions. [2022-07-23 06:11:34,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-23 06:11:34,259 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 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 14 [2022-07-23 06:11:34,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:11:34,261 INFO L225 Difference]: With dead ends: 144 [2022-07-23 06:11:34,261 INFO L226 Difference]: Without dead ends: 142 [2022-07-23 06:11:34,262 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-23 06:11:34,262 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 48 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 06:11:34,263 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 200 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 06:11:34,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2022-07-23 06:11:34,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 100. [2022-07-23 06:11:34,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 76 states have (on average 1.5526315789473684) internal successors, (118), 95 states have internal predecessors, (118), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-23 06:11:34,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 124 transitions. [2022-07-23 06:11:34,269 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 124 transitions. Word has length 14 [2022-07-23 06:11:34,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:11:34,270 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 124 transitions. [2022-07-23 06:11:34,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 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) [2022-07-23 06:11:34,270 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 124 transitions. [2022-07-23 06:11:34,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-23 06:11:34,271 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:11:34,271 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:11:34,285 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-07-23 06:11:34,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:11:34,478 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-23 06:11:34,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:11:34,479 INFO L85 PathProgramCache]: Analyzing trace with hash 1353370470, now seen corresponding path program 1 times [2022-07-23 06:11:34,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:11:34,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2114682762] [2022-07-23 06:11:34,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:11:34,480 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:11:34,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:11:34,484 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:11:34,485 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-07-23 06:11:34,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:11:34,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-23 06:11:34,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:11:34,579 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 06:11:34,579 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 06:11:34,579 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:11:34,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2114682762] [2022-07-23 06:11:34,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2114682762] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 06:11:34,580 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 06:11:34,580 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-23 06:11:34,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876521633] [2022-07-23 06:11:34,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 06:11:34,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-23 06:11:34,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:11:34,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-23 06:11:34,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-23 06:11:34,582 INFO L87 Difference]: Start difference. First operand 100 states and 124 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 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) [2022-07-23 06:11:34,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:11:34,623 INFO L93 Difference]: Finished difference Result 86 states and 102 transitions. [2022-07-23 06:11:34,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-23 06:11:34,624 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 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 14 [2022-07-23 06:11:34,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:11:34,625 INFO L225 Difference]: With dead ends: 86 [2022-07-23 06:11:34,625 INFO L226 Difference]: Without dead ends: 84 [2022-07-23 06:11:34,625 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-23 06:11:34,626 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 0 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 06:11:34,626 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 275 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 06:11:34,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-07-23 06:11:34,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2022-07-23 06:11:34,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 61 states have (on average 1.5573770491803278) internal successors, (95), 80 states have internal predecessors, (95), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-23 06:11:34,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 100 transitions. [2022-07-23 06:11:34,639 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 100 transitions. Word has length 14 [2022-07-23 06:11:34,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:11:34,640 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 100 transitions. [2022-07-23 06:11:34,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 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) [2022-07-23 06:11:34,640 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 100 transitions. [2022-07-23 06:11:34,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-07-23 06:11:34,641 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:11:34,641 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:11:34,650 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-07-23 06:11:34,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:11:34,848 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-23 06:11:34,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:11:34,848 INFO L85 PathProgramCache]: Analyzing trace with hash 1598186502, now seen corresponding path program 1 times [2022-07-23 06:11:34,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:11:34,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1371371607] [2022-07-23 06:11:34,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:11:34,849 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:11:34,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:11:34,850 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:11:34,852 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-07-23 06:11:34,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:11:34,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-23 06:11:34,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:11:34,935 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-23 06:11:35,124 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 06:11:35,124 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:11:36,267 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 06:11:36,267 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:11:36,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1371371607] [2022-07-23 06:11:36,268 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1371371607] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 06:11:36,268 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 06:11:36,268 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 20 [2022-07-23 06:11:36,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154191343] [2022-07-23 06:11:36,269 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 06:11:36,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-23 06:11:36,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:11:36,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-23 06:11:36,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-07-23 06:11:36,272 INFO L87 Difference]: Start difference. First operand 84 states and 100 transitions. Second operand has 21 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 19 states have internal predecessors, (28), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-23 06:11:38,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:11:38,156 INFO L93 Difference]: Finished difference Result 180 states and 204 transitions. [2022-07-23 06:11:38,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-23 06:11:38,157 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 19 states have internal predecessors, (28), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2022-07-23 06:11:38,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:11:38,158 INFO L225 Difference]: With dead ends: 180 [2022-07-23 06:11:38,158 INFO L226 Difference]: Without dead ends: 180 [2022-07-23 06:11:38,158 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=186, Invalid=744, Unknown=0, NotChecked=0, Total=930 [2022-07-23 06:11:38,159 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 390 mSDsluCounter, 615 mSDsCounter, 0 mSdLazyCounter, 314 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 390 SdHoareTripleChecker+Valid, 666 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 132 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-07-23 06:11:38,159 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [390 Valid, 666 Invalid, 473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 314 Invalid, 0 Unknown, 132 Unchecked, 1.2s Time] [2022-07-23 06:11:38,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2022-07-23 06:11:38,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 90. [2022-07-23 06:11:38,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 67 states have (on average 1.537313432835821) internal successors, (103), 86 states have internal predecessors, (103), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-23 06:11:38,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 108 transitions. [2022-07-23 06:11:38,163 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 108 transitions. Word has length 17 [2022-07-23 06:11:38,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:11:38,164 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 108 transitions. [2022-07-23 06:11:38,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 19 states have internal predecessors, (28), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-23 06:11:38,164 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 108 transitions. [2022-07-23 06:11:38,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-07-23 06:11:38,164 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:11:38,164 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:11:38,172 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-07-23 06:11:38,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:11:38,372 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-23 06:11:38,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:11:38,373 INFO L85 PathProgramCache]: Analyzing trace with hash 740047555, now seen corresponding path program 1 times [2022-07-23 06:11:38,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:11:38,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1251742442] [2022-07-23 06:11:38,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:11:38,374 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:11:38,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:11:38,375 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:11:38,377 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-07-23 06:11:38,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:11:38,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-23 06:11:38,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:11:38,438 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-23 06:11:38,479 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 06:11:38,480 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 06:11:38,480 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:11:38,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1251742442] [2022-07-23 06:11:38,480 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1251742442] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 06:11:38,480 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 06:11:38,480 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-23 06:11:38,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859368361] [2022-07-23 06:11:38,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 06:11:38,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-23 06:11:38,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:11:38,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-23 06:11:38,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-23 06:11:38,482 INFO L87 Difference]: Start difference. First operand 90 states and 108 transitions. Second operand has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 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) [2022-07-23 06:11:38,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:11:38,682 INFO L93 Difference]: Finished difference Result 100 states and 119 transitions. [2022-07-23 06:11:38,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-23 06:11:38,683 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 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 22 [2022-07-23 06:11:38,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:11:38,684 INFO L225 Difference]: With dead ends: 100 [2022-07-23 06:11:38,684 INFO L226 Difference]: Without dead ends: 100 [2022-07-23 06:11:38,684 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-23 06:11:38,684 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 33 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-23 06:11:38,685 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 218 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-23 06:11:38,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-07-23 06:11:38,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 91. [2022-07-23 06:11:38,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 68 states have (on average 1.5441176470588236) internal successors, (105), 87 states have internal predecessors, (105), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-23 06:11:38,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 110 transitions. [2022-07-23 06:11:38,694 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 110 transitions. Word has length 22 [2022-07-23 06:11:38,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:11:38,695 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 110 transitions. [2022-07-23 06:11:38,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 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) [2022-07-23 06:11:38,695 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 110 transitions. [2022-07-23 06:11:38,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-07-23 06:11:38,695 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:11:38,695 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:11:38,714 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-07-23 06:11:38,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:11:38,903 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-23 06:11:38,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:11:38,903 INFO L85 PathProgramCache]: Analyzing trace with hash 740047556, now seen corresponding path program 1 times [2022-07-23 06:11:38,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:11:38,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [596564123] [2022-07-23 06:11:38,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:11:38,904 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:11:38,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:11:38,905 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:11:38,906 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-07-23 06:11:38,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:11:38,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 21 conjunts are in the unsatisfiable core [2022-07-23 06:11:38,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:11:38,988 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-23 06:11:39,254 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 06:11:39,254 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:11:40,824 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 06:11:40,825 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:11:40,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [596564123] [2022-07-23 06:11:40,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [596564123] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-23 06:11:40,825 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-23 06:11:40,825 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10] total 16 [2022-07-23 06:11:40,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846584943] [2022-07-23 06:11:40,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 06:11:40,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-23 06:11:40,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:11:40,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-23 06:11:40,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2022-07-23 06:11:40,830 INFO L87 Difference]: Start difference. First operand 91 states and 110 transitions. Second operand has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 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) [2022-07-23 06:11:41,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:11:41,607 INFO L93 Difference]: Finished difference Result 108 states and 120 transitions. [2022-07-23 06:11:41,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-23 06:11:41,608 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 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 22 [2022-07-23 06:11:41,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:11:41,609 INFO L225 Difference]: With dead ends: 108 [2022-07-23 06:11:41,609 INFO L226 Difference]: Without dead ends: 108 [2022-07-23 06:11:41,609 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2022-07-23 06:11:41,613 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 138 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 38 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-23 06:11:41,613 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 256 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 111 Invalid, 0 Unknown, 38 Unchecked, 0.5s Time] [2022-07-23 06:11:41,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-07-23 06:11:41,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 91. [2022-07-23 06:11:41,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 68 states have (on average 1.5294117647058822) internal successors, (104), 87 states have internal predecessors, (104), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-23 06:11:41,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 109 transitions. [2022-07-23 06:11:41,631 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 109 transitions. Word has length 22 [2022-07-23 06:11:41,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:11:41,632 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 109 transitions. [2022-07-23 06:11:41,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 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) [2022-07-23 06:11:41,632 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 109 transitions. [2022-07-23 06:11:41,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-07-23 06:11:41,633 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:11:41,633 INFO L195 NwaCegarLoop]: 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] [2022-07-23 06:11:41,640 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-07-23 06:11:41,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:11:41,838 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-23 06:11:41,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:11:41,839 INFO L85 PathProgramCache]: Analyzing trace with hash 1466637803, now seen corresponding path program 1 times [2022-07-23 06:11:41,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:11:41,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [935606735] [2022-07-23 06:11:41,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:11:41,839 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:11:41,840 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:11:41,841 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:11:41,843 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-07-23 06:11:41,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:11:41,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-23 06:11:41,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:11:41,900 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-23 06:11:41,935 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-23 06:11:41,941 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 06:11:41,942 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:11:41,984 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2022-07-23 06:11:41,987 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2022-07-23 06:11:42,010 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 06:11:42,010 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:11:42,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [935606735] [2022-07-23 06:11:42,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [935606735] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 06:11:42,011 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 06:11:42,011 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2022-07-23 06:11:42,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717946851] [2022-07-23 06:11:42,021 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 06:11:42,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-23 06:11:42,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:11:42,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-23 06:11:42,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-07-23 06:11:42,023 INFO L87 Difference]: Start difference. First operand 91 states and 109 transitions. Second operand has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 8 states have internal predecessors, (27), 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) [2022-07-23 06:11:42,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:11:42,318 INFO L93 Difference]: Finished difference Result 159 states and 183 transitions. [2022-07-23 06:11:42,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-23 06:11:42,319 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 8 states have internal predecessors, (27), 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 23 [2022-07-23 06:11:42,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:11:42,320 INFO L225 Difference]: With dead ends: 159 [2022-07-23 06:11:42,320 INFO L226 Difference]: Without dead ends: 159 [2022-07-23 06:11:42,320 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2022-07-23 06:11:42,321 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 92 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-23 06:11:42,321 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 299 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-23 06:11:42,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2022-07-23 06:11:42,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 108. [2022-07-23 06:11:42,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 84 states have (on average 1.5714285714285714) internal successors, (132), 103 states have internal predecessors, (132), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-07-23 06:11:42,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 140 transitions. [2022-07-23 06:11:42,337 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 140 transitions. Word has length 23 [2022-07-23 06:11:42,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:11:42,337 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 140 transitions. [2022-07-23 06:11:42,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 8 states have internal predecessors, (27), 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) [2022-07-23 06:11:42,337 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 140 transitions. [2022-07-23 06:11:42,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-07-23 06:11:42,338 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:11:42,338 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:11:42,362 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-07-23 06:11:42,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:11:42,538 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-23 06:11:42,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:11:42,539 INFO L85 PathProgramCache]: Analyzing trace with hash 1828515846, now seen corresponding path program 2 times [2022-07-23 06:11:42,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:11:42,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1150458573] [2022-07-23 06:11:42,539 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-23 06:11:42,539 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:11:42,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:11:42,541 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:11:42,542 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-07-23 06:11:42,600 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-23 06:11:42,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 06:11:42,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 21 conjunts are in the unsatisfiable core [2022-07-23 06:11:42,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:11:42,643 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-23 06:11:43,373 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 06:11:43,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:11:46,413 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 06:11:46,414 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:11:46,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1150458573] [2022-07-23 06:11:46,414 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1150458573] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 06:11:46,414 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 06:11:46,414 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 27 [2022-07-23 06:11:46,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809437133] [2022-07-23 06:11:46,414 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 06:11:46,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-07-23 06:11:46,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:11:46,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-07-23 06:11:46,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=614, Unknown=0, NotChecked=0, Total=756 [2022-07-23 06:11:46,415 INFO L87 Difference]: Start difference. First operand 108 states and 140 transitions. Second operand has 28 states, 25 states have (on average 1.6) internal successors, (40), 26 states have internal predecessors, (40), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-23 06:11:50,269 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-23 06:11:51,838 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.55s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-23 06:11:56,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:11:56,211 INFO L93 Difference]: Finished difference Result 354 states and 426 transitions. [2022-07-23 06:11:56,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-07-23 06:11:56,211 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 25 states have (on average 1.6) internal successors, (40), 26 states have internal predecessors, (40), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 23 [2022-07-23 06:11:56,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:11:56,213 INFO L225 Difference]: With dead ends: 354 [2022-07-23 06:11:56,213 INFO L226 Difference]: Without dead ends: 354 [2022-07-23 06:11:56,214 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 561 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=522, Invalid=1928, Unknown=0, NotChecked=0, Total=2450 [2022-07-23 06:11:56,214 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 1036 mSDsluCounter, 1113 mSDsCounter, 0 mSdLazyCounter, 811 mSolverCounterSat, 83 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1036 SdHoareTripleChecker+Valid, 1198 SdHoareTripleChecker+Invalid, 1078 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 811 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 183 IncrementalHoareTripleChecker+Unchecked, 7.1s IncrementalHoareTripleChecker+Time [2022-07-23 06:11:56,214 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1036 Valid, 1198 Invalid, 1078 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 811 Invalid, 1 Unknown, 183 Unchecked, 7.1s Time] [2022-07-23 06:11:56,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2022-07-23 06:11:56,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 120. [2022-07-23 06:11:56,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 96 states have (on average 1.5416666666666667) internal successors, (148), 115 states have internal predecessors, (148), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-07-23 06:11:56,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 156 transitions. [2022-07-23 06:11:56,222 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 156 transitions. Word has length 23 [2022-07-23 06:11:56,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:11:56,223 INFO L495 AbstractCegarLoop]: Abstraction has 120 states and 156 transitions. [2022-07-23 06:11:56,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 25 states have (on average 1.6) internal successors, (40), 26 states have internal predecessors, (40), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-23 06:11:56,223 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 156 transitions. [2022-07-23 06:11:56,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-07-23 06:11:56,224 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:11:56,225 INFO L195 NwaCegarLoop]: 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] [2022-07-23 06:11:56,232 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Ended with exit code 0 [2022-07-23 06:11:56,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:11:56,433 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-23 06:11:56,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:11:56,434 INFO L85 PathProgramCache]: Analyzing trace with hash -1778913965, now seen corresponding path program 1 times [2022-07-23 06:11:56,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:11:56,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [168630216] [2022-07-23 06:11:56,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:11:56,435 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:11:56,435 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:11:56,436 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:11:56,438 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-07-23 06:11:56,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:11:56,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-23 06:11:56,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:11:56,641 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 06:11:56,641 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 06:11:56,641 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:11:56,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [168630216] [2022-07-23 06:11:56,641 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [168630216] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 06:11:56,641 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 06:11:56,641 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-23 06:11:56,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588905301] [2022-07-23 06:11:56,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 06:11:56,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-23 06:11:56,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:11:56,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-23 06:11:56,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-07-23 06:11:56,642 INFO L87 Difference]: Start difference. First operand 120 states and 156 transitions. Second operand has 6 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 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) [2022-07-23 06:11:56,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:11:56,744 INFO L93 Difference]: Finished difference Result 119 states and 154 transitions. [2022-07-23 06:11:56,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-23 06:11:56,746 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 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 24 [2022-07-23 06:11:56,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:11:56,747 INFO L225 Difference]: With dead ends: 119 [2022-07-23 06:11:56,747 INFO L226 Difference]: Without dead ends: 119 [2022-07-23 06:11:56,747 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-07-23 06:11:56,747 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 60 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 06:11:56,748 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 162 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 06:11:56,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-07-23 06:11:56,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2022-07-23 06:11:56,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 96 states have (on average 1.5208333333333333) internal successors, (146), 114 states have internal predecessors, (146), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-07-23 06:11:56,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 154 transitions. [2022-07-23 06:11:56,751 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 154 transitions. Word has length 24 [2022-07-23 06:11:56,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:11:56,752 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 154 transitions. [2022-07-23 06:11:56,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 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) [2022-07-23 06:11:56,752 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 154 transitions. [2022-07-23 06:11:56,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-07-23 06:11:56,752 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:11:56,752 INFO L195 NwaCegarLoop]: 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] [2022-07-23 06:11:56,763 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-07-23 06:11:56,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:11:56,953 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-23 06:11:56,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:11:56,954 INFO L85 PathProgramCache]: Analyzing trace with hash -1778868221, now seen corresponding path program 1 times [2022-07-23 06:11:56,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:11:56,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1956993805] [2022-07-23 06:11:56,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:11:56,956 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:11:56,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:11:56,958 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:11:56,959 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-07-23 06:11:57,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:11:57,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-23 06:11:57,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:11:57,070 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-23 06:11:57,146 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-23 06:11:57,171 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 06:11:57,171 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:11:57,275 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2022-07-23 06:11:57,277 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 24 [2022-07-23 06:11:57,321 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 06:11:57,321 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:11:57,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1956993805] [2022-07-23 06:11:57,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1956993805] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 06:11:57,322 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 06:11:57,322 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2022-07-23 06:11:57,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355022816] [2022-07-23 06:11:57,323 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 06:11:57,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-23 06:11:57,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:11:57,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-23 06:11:57,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-07-23 06:11:57,324 INFO L87 Difference]: Start difference. First operand 119 states and 154 transitions. Second operand has 11 states, 10 states have (on average 3.8) internal successors, (38), 11 states have internal predecessors, (38), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-23 06:11:57,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:11:57,671 INFO L93 Difference]: Finished difference Result 166 states and 191 transitions. [2022-07-23 06:11:57,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-23 06:11:57,672 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.8) internal successors, (38), 11 states have internal predecessors, (38), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2022-07-23 06:11:57,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:11:57,673 INFO L225 Difference]: With dead ends: 166 [2022-07-23 06:11:57,673 INFO L226 Difference]: Without dead ends: 166 [2022-07-23 06:11:57,673 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2022-07-23 06:11:57,673 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 130 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 52 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-23 06:11:57,674 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 372 Invalid, 319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 254 Invalid, 0 Unknown, 52 Unchecked, 0.3s Time] [2022-07-23 06:11:57,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2022-07-23 06:11:57,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 123. [2022-07-23 06:11:57,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 100 states have (on average 1.5) internal successors, (150), 118 states have internal predecessors, (150), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-07-23 06:11:57,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 158 transitions. [2022-07-23 06:11:57,677 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 158 transitions. Word has length 24 [2022-07-23 06:11:57,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:11:57,677 INFO L495 AbstractCegarLoop]: Abstraction has 123 states and 158 transitions. [2022-07-23 06:11:57,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.8) internal successors, (38), 11 states have internal predecessors, (38), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-23 06:11:57,677 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 158 transitions. [2022-07-23 06:11:57,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-07-23 06:11:57,678 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:11:57,678 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:11:57,694 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-07-23 06:11:57,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:11:57,879 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-23 06:11:57,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:11:57,879 INFO L85 PathProgramCache]: Analyzing trace with hash -878858933, now seen corresponding path program 1 times [2022-07-23 06:11:57,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:11:57,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1676403352] [2022-07-23 06:11:57,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:11:57,880 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:11:57,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:11:57,881 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:11:57,883 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-07-23 06:11:57,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:11:57,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-23 06:11:57,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:11:57,963 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-23 06:11:58,065 INFO L356 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2022-07-23 06:11:58,066 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 17 [2022-07-23 06:11:58,078 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 06:11:58,078 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:11:58,226 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 06:11:58,226 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:11:58,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1676403352] [2022-07-23 06:11:58,226 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1676403352] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 06:11:58,226 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 06:11:58,226 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2022-07-23 06:11:58,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785800473] [2022-07-23 06:11:58,226 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 06:11:58,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-23 06:11:58,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:11:58,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-23 06:11:58,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-07-23 06:11:58,227 INFO L87 Difference]: Start difference. First operand 123 states and 158 transitions. Second operand has 9 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-23 06:11:58,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:11:58,453 INFO L93 Difference]: Finished difference Result 187 states and 237 transitions. [2022-07-23 06:11:58,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-23 06:11:58,454 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 26 [2022-07-23 06:11:58,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:11:58,455 INFO L225 Difference]: With dead ends: 187 [2022-07-23 06:11:58,455 INFO L226 Difference]: Without dead ends: 187 [2022-07-23 06:11:58,455 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-07-23 06:11:58,456 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 84 mSDsluCounter, 359 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 429 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-23 06:11:58,456 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 429 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 193 Invalid, 0 Unknown, 43 Unchecked, 0.2s Time] [2022-07-23 06:11:58,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2022-07-23 06:11:58,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 142. [2022-07-23 06:11:58,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 120 states have (on average 1.4666666666666666) internal successors, (176), 135 states have internal predecessors, (176), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2022-07-23 06:11:58,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 187 transitions. [2022-07-23 06:11:58,471 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 187 transitions. Word has length 26 [2022-07-23 06:11:58,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:11:58,471 INFO L495 AbstractCegarLoop]: Abstraction has 142 states and 187 transitions. [2022-07-23 06:11:58,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-23 06:11:58,472 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 187 transitions. [2022-07-23 06:11:58,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-07-23 06:11:58,472 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:11:58,473 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:11:58,483 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-07-23 06:11:58,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:11:58,683 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-23 06:11:58,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:11:58,683 INFO L85 PathProgramCache]: Analyzing trace with hash -878858932, now seen corresponding path program 1 times [2022-07-23 06:11:58,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:11:58,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1624784936] [2022-07-23 06:11:58,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:11:58,684 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:11:58,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:11:58,685 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:11:58,687 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-07-23 06:11:58,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:11:58,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 29 conjunts are in the unsatisfiable core [2022-07-23 06:11:58,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:11:58,832 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-23 06:12:02,513 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-23 06:12:02,513 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 16 [2022-07-23 06:12:02,598 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 06:12:02,598 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:12:03,103 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:12:03,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1624784936] [2022-07-23 06:12:03,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1624784936] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 06:12:03,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1954826994] [2022-07-23 06:12:03,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:12:03,104 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-23 06:12:03,104 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-23 06:12:03,107 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-23 06:12:03,124 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2022-07-23 06:12:03,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:12:03,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-07-23 06:12:03,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:12:03,269 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-23 06:12:03,276 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-23 06:12:10,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 06:12:10,007 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-23 06:12:10,016 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-23 06:12:10,016 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 12 [2022-07-23 06:12:10,046 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 06:12:10,046 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:12:10,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1954826994] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 06:12:10,455 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 06:12:10,455 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 24 [2022-07-23 06:12:10,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129875414] [2022-07-23 06:12:10,455 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 06:12:10,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-23 06:12:10,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:12:10,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-23 06:12:10,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=662, Unknown=2, NotChecked=0, Total=756 [2022-07-23 06:12:10,457 INFO L87 Difference]: Start difference. First operand 142 states and 187 transitions. Second operand has 25 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 3 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-23 06:12:14,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:12:14,988 INFO L93 Difference]: Finished difference Result 149 states and 198 transitions. [2022-07-23 06:12:14,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-23 06:12:14,988 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 3 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 26 [2022-07-23 06:12:14,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:12:14,989 INFO L225 Difference]: With dead ends: 149 [2022-07-23 06:12:14,989 INFO L226 Difference]: Without dead ends: 149 [2022-07-23 06:12:14,990 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 14.9s TimeCoverageRelationStatistics Valid=125, Invalid=927, Unknown=4, NotChecked=0, Total=1056 [2022-07-23 06:12:14,990 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 38 mSDsluCounter, 730 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 787 SdHoareTripleChecker+Invalid, 508 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 199 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-23 06:12:14,990 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 787 Invalid, 508 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 300 Invalid, 0 Unknown, 199 Unchecked, 0.3s Time] [2022-07-23 06:12:14,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2022-07-23 06:12:14,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 148. [2022-07-23 06:12:14,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 125 states have (on average 1.464) internal successors, (183), 140 states have internal predecessors, (183), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2022-07-23 06:12:14,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 197 transitions. [2022-07-23 06:12:14,994 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 197 transitions. Word has length 26 [2022-07-23 06:12:14,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:12:14,995 INFO L495 AbstractCegarLoop]: Abstraction has 148 states and 197 transitions. [2022-07-23 06:12:14,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 3 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-23 06:12:14,995 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 197 transitions. [2022-07-23 06:12:14,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-07-23 06:12:14,995 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:12:14,995 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:12:15,003 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (17)] Ended with exit code 0 [2022-07-23 06:12:15,211 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-07-23 06:12:15,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:12:15,401 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-23 06:12:15,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:12:15,402 INFO L85 PathProgramCache]: Analyzing trace with hash -850229781, now seen corresponding path program 1 times [2022-07-23 06:12:15,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:12:15,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [288519915] [2022-07-23 06:12:15,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:12:15,402 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:12:15,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:12:15,405 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:12:15,406 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-07-23 06:12:15,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:12:15,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-23 06:12:15,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:12:15,501 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-23 06:12:15,501 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 06:12:15,502 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:12:15,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [288519915] [2022-07-23 06:12:15,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [288519915] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 06:12:15,502 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 06:12:15,502 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-23 06:12:15,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065019291] [2022-07-23 06:12:15,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 06:12:15,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-23 06:12:15,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:12:15,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-23 06:12:15,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-23 06:12:15,504 INFO L87 Difference]: Start difference. First operand 148 states and 197 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-23 06:12:15,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:12:15,537 INFO L93 Difference]: Finished difference Result 161 states and 202 transitions. [2022-07-23 06:12:15,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-23 06:12:15,538 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 26 [2022-07-23 06:12:15,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:12:15,539 INFO L225 Difference]: With dead ends: 161 [2022-07-23 06:12:15,539 INFO L226 Difference]: Without dead ends: 161 [2022-07-23 06:12:15,539 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-23 06:12:15,541 INFO L413 NwaCegarLoop]: 90 mSDtfsCounter, 37 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 06:12:15,541 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 312 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 06:12:15,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2022-07-23 06:12:15,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 138. [2022-07-23 06:12:15,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 116 states have (on average 1.4482758620689655) internal successors, (168), 130 states have internal predecessors, (168), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (7), 6 states have call predecessors, (7), 4 states have call successors, (7) [2022-07-23 06:12:15,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 179 transitions. [2022-07-23 06:12:15,548 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 179 transitions. Word has length 26 [2022-07-23 06:12:15,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:12:15,549 INFO L495 AbstractCegarLoop]: Abstraction has 138 states and 179 transitions. [2022-07-23 06:12:15,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-23 06:12:15,549 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 179 transitions. [2022-07-23 06:12:15,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-07-23 06:12:15,552 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:12:15,552 INFO L195 NwaCegarLoop]: 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] [2022-07-23 06:12:15,580 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-07-23 06:12:15,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:12:15,760 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-23 06:12:15,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:12:15,761 INFO L85 PathProgramCache]: Analyzing trace with hash -24310932, now seen corresponding path program 1 times [2022-07-23 06:12:15,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:12:15,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1777732881] [2022-07-23 06:12:15,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:12:15,762 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:12:15,762 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:12:15,763 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:12:15,765 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-07-23 06:12:15,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:12:15,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-23 06:12:15,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:12:15,906 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 06:12:15,907 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:12:15,996 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 06:12:15,997 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:12:15,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1777732881] [2022-07-23 06:12:15,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1777732881] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 06:12:15,997 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 06:12:15,997 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 13 [2022-07-23 06:12:15,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220319774] [2022-07-23 06:12:15,997 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 06:12:15,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-23 06:12:15,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:12:15,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-23 06:12:15,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2022-07-23 06:12:15,998 INFO L87 Difference]: Start difference. First operand 138 states and 179 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-23 06:12:16,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:12:16,279 INFO L93 Difference]: Finished difference Result 262 states and 306 transitions. [2022-07-23 06:12:16,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-23 06:12:16,280 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 27 [2022-07-23 06:12:16,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:12:16,281 INFO L225 Difference]: With dead ends: 262 [2022-07-23 06:12:16,281 INFO L226 Difference]: Without dead ends: 262 [2022-07-23 06:12:16,281 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2022-07-23 06:12:16,281 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 767 mSDsluCounter, 308 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 767 SdHoareTripleChecker+Valid, 368 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 06:12:16,281 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [767 Valid, 368 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 06:12:16,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2022-07-23 06:12:16,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 121. [2022-07-23 06:12:16,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 99 states have (on average 1.4343434343434343) internal successors, (142), 113 states have internal predecessors, (142), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (7), 6 states have call predecessors, (7), 4 states have call successors, (7) [2022-07-23 06:12:16,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 153 transitions. [2022-07-23 06:12:16,285 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 153 transitions. Word has length 27 [2022-07-23 06:12:16,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:12:16,285 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 153 transitions. [2022-07-23 06:12:16,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-23 06:12:16,285 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 153 transitions. [2022-07-23 06:12:16,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-23 06:12:16,285 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:12:16,286 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:12:16,298 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-07-23 06:12:16,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:12:16,494 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-23 06:12:16,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:12:16,495 INFO L85 PathProgramCache]: Analyzing trace with hash 1525074233, now seen corresponding path program 1 times [2022-07-23 06:12:16,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:12:16,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1104235983] [2022-07-23 06:12:16,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:12:16,496 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:12:16,496 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:12:16,497 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:12:16,499 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-07-23 06:12:16,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:12:16,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-23 06:12:16,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:12:16,588 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-23 06:12:16,588 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 06:12:16,588 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:12:16,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1104235983] [2022-07-23 06:12:16,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1104235983] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 06:12:16,589 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 06:12:16,589 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-23 06:12:16,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115492073] [2022-07-23 06:12:16,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 06:12:16,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-23 06:12:16,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:12:16,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-23 06:12:16,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-23 06:12:16,591 INFO L87 Difference]: Start difference. First operand 121 states and 153 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-23 06:12:16,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:12:16,627 INFO L93 Difference]: Finished difference Result 141 states and 170 transitions. [2022-07-23 06:12:16,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-23 06:12:16,632 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 28 [2022-07-23 06:12:16,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:12:16,633 INFO L225 Difference]: With dead ends: 141 [2022-07-23 06:12:16,633 INFO L226 Difference]: Without dead ends: 141 [2022-07-23 06:12:16,634 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-23 06:12:16,634 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 28 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 06:12:16,635 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 258 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 06:12:16,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2022-07-23 06:12:16,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 118. [2022-07-23 06:12:16,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 96 states have (on average 1.4166666666666667) internal successors, (136), 111 states have internal predecessors, (136), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2022-07-23 06:12:16,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 147 transitions. [2022-07-23 06:12:16,640 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 147 transitions. Word has length 28 [2022-07-23 06:12:16,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:12:16,640 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 147 transitions. [2022-07-23 06:12:16,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-23 06:12:16,640 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 147 transitions. [2022-07-23 06:12:16,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-23 06:12:16,641 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:12:16,641 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:12:16,650 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-07-23 06:12:16,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:12:16,849 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-23 06:12:16,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:12:16,850 INFO L85 PathProgramCache]: Analyzing trace with hash -1027082728, now seen corresponding path program 1 times [2022-07-23 06:12:16,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:12:16,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1996681094] [2022-07-23 06:12:16,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:12:16,850 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:12:16,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:12:16,851 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:12:16,853 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-07-23 06:12:16,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:12:16,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-23 06:12:16,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:12:16,917 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-23 06:12:16,918 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 06:12:16,918 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:12:16,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1996681094] [2022-07-23 06:12:16,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1996681094] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 06:12:16,918 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 06:12:16,918 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-23 06:12:16,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035540644] [2022-07-23 06:12:16,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 06:12:16,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-23 06:12:16,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:12:16,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-23 06:12:16,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-23 06:12:16,920 INFO L87 Difference]: Start difference. First operand 118 states and 147 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-23 06:12:16,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:12:16,972 INFO L93 Difference]: Finished difference Result 133 states and 153 transitions. [2022-07-23 06:12:16,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-23 06:12:16,973 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 28 [2022-07-23 06:12:16,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:12:16,973 INFO L225 Difference]: With dead ends: 133 [2022-07-23 06:12:16,973 INFO L226 Difference]: Without dead ends: 133 [2022-07-23 06:12:16,974 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-23 06:12:16,974 INFO L413 NwaCegarLoop]: 84 mSDtfsCounter, 50 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 06:12:16,974 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 201 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 06:12:16,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2022-07-23 06:12:16,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 108. [2022-07-23 06:12:16,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 86 states have (on average 1.3604651162790697) internal successors, (117), 101 states have internal predecessors, (117), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2022-07-23 06:12:16,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 128 transitions. [2022-07-23 06:12:16,977 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 128 transitions. Word has length 28 [2022-07-23 06:12:16,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:12:16,977 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 128 transitions. [2022-07-23 06:12:16,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-23 06:12:16,977 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 128 transitions. [2022-07-23 06:12:16,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-23 06:12:16,977 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:12:16,977 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:12:16,985 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Ended with exit code 0 [2022-07-23 06:12:17,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:12:17,184 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-23 06:12:17,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:12:17,184 INFO L85 PathProgramCache]: Analyzing trace with hash 1822208300, now seen corresponding path program 2 times [2022-07-23 06:12:17,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:12:17,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1456998940] [2022-07-23 06:12:17,185 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-23 06:12:17,185 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:12:17,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:12:17,186 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:12:17,188 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-07-23 06:12:17,275 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-23 06:12:17,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 06:12:17,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-23 06:12:17,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:12:17,311 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-23 06:12:17,317 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-23 06:12:17,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 06:12:17,825 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2022-07-23 06:12:17,835 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-23 06:12:17,835 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 12 [2022-07-23 06:12:17,923 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 06:12:17,924 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:12:22,689 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:12:22,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1456998940] [2022-07-23 06:12:22,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1456998940] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 06:12:22,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1169288806] [2022-07-23 06:12:22,690 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-23 06:12:22,690 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-23 06:12:22,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-23 06:12:22,692 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-23 06:12:22,709 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2022-07-23 06:12:22,802 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-23 06:12:22,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 06:12:22,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-23 06:12:22,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:12:22,819 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-23 06:12:22,824 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-23 06:12:23,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 06:12:23,091 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2022-07-23 06:12:23,099 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-23 06:12:23,100 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 12 [2022-07-23 06:12:23,166 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 06:12:23,166 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:12:25,476 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1169288806] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 06:12:25,476 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 06:12:25,476 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2022-07-23 06:12:25,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792201496] [2022-07-23 06:12:25,477 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 06:12:25,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-23 06:12:25,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:12:25,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-23 06:12:25,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=320, Unknown=1, NotChecked=0, Total=380 [2022-07-23 06:12:25,479 INFO L87 Difference]: Start difference. First operand 108 states and 128 transitions. Second operand has 18 states, 16 states have (on average 1.6875) internal successors, (27), 17 states have internal predecessors, (27), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-23 06:12:28,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:12:28,102 INFO L93 Difference]: Finished difference Result 168 states and 192 transitions. [2022-07-23 06:12:28,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-23 06:12:28,103 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 1.6875) internal successors, (27), 17 states have internal predecessors, (27), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 29 [2022-07-23 06:12:28,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:12:28,104 INFO L225 Difference]: With dead ends: 168 [2022-07-23 06:12:28,104 INFO L226 Difference]: Without dead ends: 168 [2022-07-23 06:12:28,104 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=85, Invalid=513, Unknown=2, NotChecked=0, Total=600 [2022-07-23 06:12:28,104 INFO L413 NwaCegarLoop]: 84 mSDtfsCounter, 85 mSDsluCounter, 740 mSDsCounter, 0 mSdLazyCounter, 423 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 824 SdHoareTripleChecker+Invalid, 633 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 423 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 194 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-23 06:12:28,105 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 824 Invalid, 633 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 423 Invalid, 0 Unknown, 194 Unchecked, 0.4s Time] [2022-07-23 06:12:28,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2022-07-23 06:12:28,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 120. [2022-07-23 06:12:28,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 97 states have (on average 1.3298969072164948) internal successors, (129), 112 states have internal predecessors, (129), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2022-07-23 06:12:28,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 143 transitions. [2022-07-23 06:12:28,107 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 143 transitions. Word has length 29 [2022-07-23 06:12:28,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:12:28,108 INFO L495 AbstractCegarLoop]: Abstraction has 120 states and 143 transitions. [2022-07-23 06:12:28,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 1.6875) internal successors, (27), 17 states have internal predecessors, (27), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-23 06:12:28,108 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 143 transitions. [2022-07-23 06:12:28,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-07-23 06:12:28,108 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:12:28,108 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 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] [2022-07-23 06:12:28,123 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-07-23 06:12:28,320 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (23)] Ended with exit code 0 [2022-07-23 06:12:28,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2022-07-23 06:12:28,518 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-23 06:12:28,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:12:28,518 INFO L85 PathProgramCache]: Analyzing trace with hash -475836742, now seen corresponding path program 1 times [2022-07-23 06:12:28,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:12:28,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1715358689] [2022-07-23 06:12:28,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:12:28,519 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:12:28,519 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:12:28,520 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:12:28,522 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-07-23 06:12:28,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:12:28,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-23 06:12:28,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:12:28,578 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-23 06:12:28,645 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 06:12:28,646 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:12:28,714 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 06:12:28,714 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:12:28,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1715358689] [2022-07-23 06:12:28,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1715358689] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 06:12:28,714 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 06:12:28,714 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2022-07-23 06:12:28,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700349766] [2022-07-23 06:12:28,714 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 06:12:28,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-23 06:12:28,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:12:28,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-23 06:12:28,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-07-23 06:12:28,717 INFO L87 Difference]: Start difference. First operand 120 states and 143 transitions. Second operand has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-23 06:12:28,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:12:28,873 INFO L93 Difference]: Finished difference Result 126 states and 146 transitions. [2022-07-23 06:12:28,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-23 06:12:28,874 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 31 [2022-07-23 06:12:28,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:12:28,874 INFO L225 Difference]: With dead ends: 126 [2022-07-23 06:12:28,874 INFO L226 Difference]: Without dead ends: 126 [2022-07-23 06:12:28,875 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-07-23 06:12:28,875 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 26 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 31 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 06:12:28,875 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 275 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 123 Invalid, 0 Unknown, 31 Unchecked, 0.1s Time] [2022-07-23 06:12:28,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2022-07-23 06:12:28,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 124. [2022-07-23 06:12:28,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 100 states have (on average 1.32) internal successors, (132), 115 states have internal predecessors, (132), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2022-07-23 06:12:28,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 146 transitions. [2022-07-23 06:12:28,878 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 146 transitions. Word has length 31 [2022-07-23 06:12:28,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:12:28,878 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 146 transitions. [2022-07-23 06:12:28,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-23 06:12:28,878 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 146 transitions. [2022-07-23 06:12:28,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-07-23 06:12:28,879 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:12:28,879 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 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] [2022-07-23 06:12:28,905 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2022-07-23 06:12:29,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:12:29,079 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-23 06:12:29,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:12:29,080 INFO L85 PathProgramCache]: Analyzing trace with hash -475836741, now seen corresponding path program 1 times [2022-07-23 06:12:29,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:12:29,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1352470928] [2022-07-23 06:12:29,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:12:29,080 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:12:29,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:12:29,081 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:12:29,082 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-07-23 06:12:29,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:12:29,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-23 06:12:29,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:12:29,168 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-23 06:12:29,453 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 06:12:29,453 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:12:30,213 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 06:12:30,213 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:12:30,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1352470928] [2022-07-23 06:12:30,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1352470928] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 06:12:30,213 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 06:12:30,213 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 18 [2022-07-23 06:12:30,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482654705] [2022-07-23 06:12:30,214 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 06:12:30,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-23 06:12:30,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:12:30,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-23 06:12:30,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2022-07-23 06:12:30,214 INFO L87 Difference]: Start difference. First operand 124 states and 146 transitions. Second operand has 19 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 17 states have internal predecessors, (52), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-23 06:12:30,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:12:30,914 INFO L93 Difference]: Finished difference Result 144 states and 169 transitions. [2022-07-23 06:12:30,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-23 06:12:30,917 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 17 states have internal predecessors, (52), 4 states have call successors, (4), 3 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 31 [2022-07-23 06:12:30,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:12:30,918 INFO L225 Difference]: With dead ends: 144 [2022-07-23 06:12:30,918 INFO L226 Difference]: Without dead ends: 144 [2022-07-23 06:12:30,918 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2022-07-23 06:12:30,918 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 44 mSDsluCounter, 520 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 576 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 77 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-23 06:12:30,919 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 576 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 196 Invalid, 0 Unknown, 77 Unchecked, 0.5s Time] [2022-07-23 06:12:30,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2022-07-23 06:12:30,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 124. [2022-07-23 06:12:30,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 100 states have (on average 1.31) internal successors, (131), 115 states have internal predecessors, (131), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2022-07-23 06:12:30,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 145 transitions. [2022-07-23 06:12:30,923 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 145 transitions. Word has length 31 [2022-07-23 06:12:30,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:12:30,924 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 145 transitions. [2022-07-23 06:12:30,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 17 states have internal predecessors, (52), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-23 06:12:30,924 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 145 transitions. [2022-07-23 06:12:30,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-07-23 06:12:30,924 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:12:30,925 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 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] [2022-07-23 06:12:30,937 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2022-07-23 06:12:31,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:12:31,131 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-23 06:12:31,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:12:31,132 INFO L85 PathProgramCache]: Analyzing trace with hash 818465468, now seen corresponding path program 1 times [2022-07-23 06:12:31,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:12:31,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1900552497] [2022-07-23 06:12:31,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:12:31,132 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:12:31,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:12:31,133 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:12:31,134 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-07-23 06:12:31,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:12:31,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-23 06:12:31,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:12:31,241 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-23 06:12:31,241 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:12:31,257 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-07-23 06:12:31,257 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 11 [2022-07-23 06:12:31,271 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-23 06:12:31,272 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:12:31,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1900552497] [2022-07-23 06:12:31,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1900552497] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 06:12:31,272 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 06:12:31,272 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2022-07-23 06:12:31,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38292064] [2022-07-23 06:12:31,273 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 06:12:31,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-23 06:12:31,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:12:31,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-23 06:12:31,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-23 06:12:31,274 INFO L87 Difference]: Start difference. First operand 124 states and 145 transitions. Second operand has 5 states, 4 states have (on average 6.25) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-23 06:12:31,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:12:31,457 INFO L93 Difference]: Finished difference Result 143 states and 166 transitions. [2022-07-23 06:12:31,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-23 06:12:31,458 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.25) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 32 [2022-07-23 06:12:31,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:12:31,462 INFO L225 Difference]: With dead ends: 143 [2022-07-23 06:12:31,462 INFO L226 Difference]: Without dead ends: 143 [2022-07-23 06:12:31,463 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-07-23 06:12:31,466 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 82 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-23 06:12:31,466 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 151 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-23 06:12:31,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-07-23 06:12:31,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 129. [2022-07-23 06:12:31,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 105 states have (on average 1.3238095238095238) internal successors, (139), 120 states have internal predecessors, (139), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2022-07-23 06:12:31,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 153 transitions. [2022-07-23 06:12:31,490 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 153 transitions. Word has length 32 [2022-07-23 06:12:31,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:12:31,491 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 153 transitions. [2022-07-23 06:12:31,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.25) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-23 06:12:31,491 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 153 transitions. [2022-07-23 06:12:31,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-07-23 06:12:31,492 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:12:31,493 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 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] [2022-07-23 06:12:31,500 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Ended with exit code 0 [2022-07-23 06:12:31,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:12:31,699 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-23 06:12:31,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:12:31,700 INFO L85 PathProgramCache]: Analyzing trace with hash 818465469, now seen corresponding path program 1 times [2022-07-23 06:12:31,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:12:31,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [229277862] [2022-07-23 06:12:31,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:12:31,700 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:12:31,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:12:31,702 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:12:31,704 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-07-23 06:12:31,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:12:31,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-23 06:12:31,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:12:31,919 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-23 06:12:31,919 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:12:32,119 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 06:12:32,119 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 29 [2022-07-23 06:12:32,394 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-23 06:12:32,394 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:12:32,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [229277862] [2022-07-23 06:12:32,394 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [229277862] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 06:12:32,394 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 06:12:32,395 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2022-07-23 06:12:32,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348186623] [2022-07-23 06:12:32,395 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 06:12:32,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-23 06:12:32,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:12:32,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-23 06:12:32,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2022-07-23 06:12:32,396 INFO L87 Difference]: Start difference. First operand 129 states and 153 transitions. Second operand has 14 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 12 states have internal predecessors, (46), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-23 06:12:33,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:12:33,922 INFO L93 Difference]: Finished difference Result 280 states and 311 transitions. [2022-07-23 06:12:33,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-23 06:12:33,922 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 12 states have internal predecessors, (46), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 32 [2022-07-23 06:12:33,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:12:33,923 INFO L225 Difference]: With dead ends: 280 [2022-07-23 06:12:33,923 INFO L226 Difference]: Without dead ends: 280 [2022-07-23 06:12:33,924 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=131, Invalid=421, Unknown=0, NotChecked=0, Total=552 [2022-07-23 06:12:33,924 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 325 mSDsluCounter, 383 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 326 SdHoareTripleChecker+Valid, 445 SdHoareTripleChecker+Invalid, 340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-23 06:12:33,924 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [326 Valid, 445 Invalid, 340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-23 06:12:33,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2022-07-23 06:12:33,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 143. [2022-07-23 06:12:33,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 120 states have (on average 1.3666666666666667) internal successors, (164), 132 states have internal predecessors, (164), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (9), 8 states have call predecessors, (9), 5 states have call successors, (9) [2022-07-23 06:12:33,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 178 transitions. [2022-07-23 06:12:33,939 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 178 transitions. Word has length 32 [2022-07-23 06:12:33,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:12:33,940 INFO L495 AbstractCegarLoop]: Abstraction has 143 states and 178 transitions. [2022-07-23 06:12:33,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 12 states have internal predecessors, (46), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-23 06:12:33,940 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 178 transitions. [2022-07-23 06:12:33,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-07-23 06:12:33,941 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:12:33,941 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:12:33,965 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2022-07-23 06:12:34,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:12:34,165 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-23 06:12:34,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:12:34,166 INFO L85 PathProgramCache]: Analyzing trace with hash -1191141044, now seen corresponding path program 3 times [2022-07-23 06:12:34,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:12:34,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1600742937] [2022-07-23 06:12:34,166 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-23 06:12:34,166 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:12:34,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:12:34,168 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:12:34,169 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-07-23 06:12:34,225 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-23 06:12:34,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 06:12:34,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 27 conjunts are in the unsatisfiable core [2022-07-23 06:12:34,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:12:34,256 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-23 06:12:34,261 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-23 06:12:34,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 06:12:34,582 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-23 06:12:34,592 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-23 06:12:34,592 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 12 [2022-07-23 06:12:34,693 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-23 06:12:34,693 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:12:35,191 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:12:35,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1600742937] [2022-07-23 06:12:35,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1600742937] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 06:12:35,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [244468680] [2022-07-23 06:12:35,192 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-23 06:12:35,192 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-23 06:12:35,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-23 06:12:35,193 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-23 06:12:35,198 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (29)] Waiting until timeout for monitored process [2022-07-23 06:12:35,288 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-23 06:12:35,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 06:12:35,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 27 conjunts are in the unsatisfiable core [2022-07-23 06:12:35,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:12:35,302 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-23 06:12:35,307 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-23 06:12:37,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 06:12:37,521 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-23 06:12:37,529 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-23 06:12:37,529 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 12 [2022-07-23 06:12:37,555 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-23 06:12:37,555 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:12:37,804 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [244468680] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 06:12:37,804 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 06:12:37,804 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2022-07-23 06:12:37,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83994] [2022-07-23 06:12:37,804 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 06:12:37,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-23 06:12:37,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:12:37,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-23 06:12:37,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2022-07-23 06:12:37,805 INFO L87 Difference]: Start difference. First operand 143 states and 178 transitions. Second operand has 13 states, 11 states have (on average 2.0) internal successors, (22), 12 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-23 06:12:40,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:12:40,049 INFO L93 Difference]: Finished difference Result 143 states and 177 transitions. [2022-07-23 06:12:40,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-23 06:12:40,050 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 2.0) internal successors, (22), 12 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 32 [2022-07-23 06:12:40,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:12:40,050 INFO L225 Difference]: With dead ends: 143 [2022-07-23 06:12:40,050 INFO L226 Difference]: Without dead ends: 143 [2022-07-23 06:12:40,051 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=51, Invalid=290, Unknown=1, NotChecked=0, Total=342 [2022-07-23 06:12:40,051 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 8 mSDsluCounter, 380 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 437 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 99 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 06:12:40,051 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 437 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 64 Invalid, 0 Unknown, 99 Unchecked, 0.1s Time] [2022-07-23 06:12:40,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-07-23 06:12:40,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 137. [2022-07-23 06:12:40,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 115 states have (on average 1.373913043478261) internal successors, (158), 127 states have internal predecessors, (158), 4 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (7), 7 states have call predecessors, (7), 4 states have call successors, (7) [2022-07-23 06:12:40,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 169 transitions. [2022-07-23 06:12:40,054 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 169 transitions. Word has length 32 [2022-07-23 06:12:40,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:12:40,054 INFO L495 AbstractCegarLoop]: Abstraction has 137 states and 169 transitions. [2022-07-23 06:12:40,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 2.0) internal successors, (22), 12 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-23 06:12:40,055 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 169 transitions. [2022-07-23 06:12:40,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-07-23 06:12:40,055 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:12:40,055 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 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] [2022-07-23 06:12:40,058 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (29)] Forceful destruction successful, exit code 0 [2022-07-23 06:12:40,265 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2022-07-23 06:12:40,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:12:40,458 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-23 06:12:40,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:12:40,459 INFO L85 PathProgramCache]: Analyzing trace with hash -397374190, now seen corresponding path program 1 times [2022-07-23 06:12:40,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:12:40,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1894919509] [2022-07-23 06:12:40,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:12:40,459 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:12:40,459 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:12:40,461 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:12:40,462 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-07-23 06:12:40,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:12:40,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-23 06:12:40,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:12:40,604 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-23 06:12:40,636 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-23 06:12:40,645 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-23 06:12:40,645 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:12:40,676 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2022-07-23 06:12:40,806 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-23 06:12:40,806 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:12:40,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1894919509] [2022-07-23 06:12:40,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1894919509] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 06:12:40,806 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 06:12:40,806 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2022-07-23 06:12:40,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873068042] [2022-07-23 06:12:40,806 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 06:12:40,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-23 06:12:40,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:12:40,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-23 06:12:40,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-07-23 06:12:40,807 INFO L87 Difference]: Start difference. First operand 137 states and 169 transitions. Second operand has 13 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-23 06:12:41,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:12:41,542 INFO L93 Difference]: Finished difference Result 214 states and 240 transitions. [2022-07-23 06:12:41,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-23 06:12:41,543 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 33 [2022-07-23 06:12:41,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:12:41,544 INFO L225 Difference]: With dead ends: 214 [2022-07-23 06:12:41,544 INFO L226 Difference]: Without dead ends: 214 [2022-07-23 06:12:41,544 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2022-07-23 06:12:41,545 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 109 mSDsluCounter, 567 mSDsCounter, 0 mSdLazyCounter, 405 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 640 SdHoareTripleChecker+Invalid, 412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-23 06:12:41,545 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 640 Invalid, 412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 405 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-23 06:12:41,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2022-07-23 06:12:41,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 146. [2022-07-23 06:12:41,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 124 states have (on average 1.3790322580645162) internal successors, (171), 136 states have internal predecessors, (171), 4 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (7), 7 states have call predecessors, (7), 4 states have call successors, (7) [2022-07-23 06:12:41,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 182 transitions. [2022-07-23 06:12:41,548 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 182 transitions. Word has length 33 [2022-07-23 06:12:41,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:12:41,548 INFO L495 AbstractCegarLoop]: Abstraction has 146 states and 182 transitions. [2022-07-23 06:12:41,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-23 06:12:41,549 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 182 transitions. [2022-07-23 06:12:41,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-07-23 06:12:41,549 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:12:41,549 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 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] [2022-07-23 06:12:41,558 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2022-07-23 06:12:41,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:12:41,750 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-23 06:12:41,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:12:41,751 INFO L85 PathProgramCache]: Analyzing trace with hash 566302140, now seen corresponding path program 1 times [2022-07-23 06:12:41,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:12:41,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1319930944] [2022-07-23 06:12:41,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:12:41,751 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:12:41,751 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:12:41,753 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:12:41,754 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2022-07-23 06:12:41,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:12:41,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-23 06:12:41,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:12:42,069 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-23 06:12:42,160 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-23 06:12:42,194 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 06:12:42,194 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:12:42,265 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2022-07-23 06:12:42,469 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-23 06:12:42,469 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:12:42,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1319930944] [2022-07-23 06:12:42,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1319930944] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 06:12:42,469 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 06:12:42,469 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 17 [2022-07-23 06:12:42,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370039445] [2022-07-23 06:12:42,469 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 06:12:42,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-23 06:12:42,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:12:42,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-23 06:12:42,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2022-07-23 06:12:42,470 INFO L87 Difference]: Start difference. First operand 146 states and 182 transitions. Second operand has 18 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 16 states have internal predecessors, (59), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-23 06:12:42,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:12:42,684 INFO L93 Difference]: Finished difference Result 181 states and 221 transitions. [2022-07-23 06:12:42,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-23 06:12:42,685 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 16 states have internal predecessors, (59), 4 states have call successors, (4), 3 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 34 [2022-07-23 06:12:42,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:12:42,686 INFO L225 Difference]: With dead ends: 181 [2022-07-23 06:12:42,686 INFO L226 Difference]: Without dead ends: 179 [2022-07-23 06:12:42,686 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2022-07-23 06:12:42,686 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 45 mSDsluCounter, 575 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 653 SdHoareTripleChecker+Invalid, 329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 193 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-23 06:12:42,687 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 653 Invalid, 329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 130 Invalid, 0 Unknown, 193 Unchecked, 0.2s Time] [2022-07-23 06:12:42,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2022-07-23 06:12:42,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 155. [2022-07-23 06:12:42,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 132 states have (on average 1.3636363636363635) internal successors, (180), 144 states have internal predecessors, (180), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (7), 7 states have call predecessors, (7), 4 states have call successors, (7) [2022-07-23 06:12:42,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 191 transitions. [2022-07-23 06:12:42,690 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 191 transitions. Word has length 34 [2022-07-23 06:12:42,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:12:42,690 INFO L495 AbstractCegarLoop]: Abstraction has 155 states and 191 transitions. [2022-07-23 06:12:42,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 16 states have internal predecessors, (59), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-23 06:12:42,690 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 191 transitions. [2022-07-23 06:12:42,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-07-23 06:12:42,690 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:12:42,691 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 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] [2022-07-23 06:12:42,711 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2022-07-23 06:12:42,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:12:42,899 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-23 06:12:42,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:12:42,899 INFO L85 PathProgramCache]: Analyzing trace with hash 375497300, now seen corresponding path program 1 times [2022-07-23 06:12:42,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:12:42,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1012897208] [2022-07-23 06:12:42,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:12:42,900 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:12:42,900 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:12:42,901 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:12:42,904 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2022-07-23 06:12:42,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:12:42,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-23 06:12:42,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:12:42,996 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-23 06:12:43,051 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-23 06:12:43,088 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2022-07-23 06:12:43,101 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-23 06:12:43,101 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:12:43,136 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 36 [2022-07-23 06:12:43,327 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-23 06:12:43,327 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:12:43,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1012897208] [2022-07-23 06:12:43,327 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1012897208] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 06:12:43,327 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 06:12:43,327 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2022-07-23 06:12:43,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015791386] [2022-07-23 06:12:43,327 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 06:12:43,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-23 06:12:43,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:12:43,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-23 06:12:43,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2022-07-23 06:12:43,328 INFO L87 Difference]: Start difference. First operand 155 states and 191 transitions. Second operand has 13 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-23 06:12:43,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:12:43,649 INFO L93 Difference]: Finished difference Result 183 states and 219 transitions. [2022-07-23 06:12:43,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-23 06:12:43,650 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 35 [2022-07-23 06:12:43,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:12:43,651 INFO L225 Difference]: With dead ends: 183 [2022-07-23 06:12:43,651 INFO L226 Difference]: Without dead ends: 183 [2022-07-23 06:12:43,651 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2022-07-23 06:12:43,651 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 54 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 349 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 125 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-23 06:12:43,651 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 349 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 197 Invalid, 0 Unknown, 125 Unchecked, 0.3s Time] [2022-07-23 06:12:43,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2022-07-23 06:12:43,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 150. [2022-07-23 06:12:43,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 127 states have (on average 1.3700787401574803) internal successors, (174), 139 states have internal predecessors, (174), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (7), 7 states have call predecessors, (7), 4 states have call successors, (7) [2022-07-23 06:12:43,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 185 transitions. [2022-07-23 06:12:43,655 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 185 transitions. Word has length 35 [2022-07-23 06:12:43,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:12:43,655 INFO L495 AbstractCegarLoop]: Abstraction has 150 states and 185 transitions. [2022-07-23 06:12:43,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-23 06:12:43,656 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 185 transitions. [2022-07-23 06:12:43,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-07-23 06:12:43,656 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:12:43,656 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:12:43,665 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2022-07-23 06:12:43,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:12:43,864 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-23 06:12:43,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:12:43,864 INFO L85 PathProgramCache]: Analyzing trace with hash -2027972411, now seen corresponding path program 1 times [2022-07-23 06:12:43,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:12:43,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1406892443] [2022-07-23 06:12:43,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:12:43,864 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:12:43,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:12:43,866 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:12:43,867 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2022-07-23 06:12:43,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:12:43,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-23 06:12:43,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:12:44,068 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-23 06:12:44,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:12:44,212 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-23 06:12:44,212 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:12:44,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1406892443] [2022-07-23 06:12:44,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1406892443] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 06:12:44,212 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 06:12:44,212 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2022-07-23 06:12:44,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9965590] [2022-07-23 06:12:44,212 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 06:12:44,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-23 06:12:44,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:12:44,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-23 06:12:44,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2022-07-23 06:12:44,213 INFO L87 Difference]: Start difference. First operand 150 states and 185 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-23 06:12:44,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:12:44,630 INFO L93 Difference]: Finished difference Result 254 states and 296 transitions. [2022-07-23 06:12:44,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-23 06:12:44,631 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 36 [2022-07-23 06:12:44,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:12:44,631 INFO L225 Difference]: With dead ends: 254 [2022-07-23 06:12:44,631 INFO L226 Difference]: Without dead ends: 254 [2022-07-23 06:12:44,632 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=166, Invalid=484, Unknown=0, NotChecked=0, Total=650 [2022-07-23 06:12:44,632 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 728 mSDsluCounter, 379 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 728 SdHoareTripleChecker+Valid, 452 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-23 06:12:44,632 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [728 Valid, 452 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-23 06:12:44,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2022-07-23 06:12:44,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 158. [2022-07-23 06:12:44,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 134 states have (on average 1.3507462686567164) internal successors, (181), 146 states have internal predecessors, (181), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (9), 8 states have call predecessors, (9), 5 states have call successors, (9) [2022-07-23 06:12:44,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 195 transitions. [2022-07-23 06:12:44,636 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 195 transitions. Word has length 36 [2022-07-23 06:12:44,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:12:44,636 INFO L495 AbstractCegarLoop]: Abstraction has 158 states and 195 transitions. [2022-07-23 06:12:44,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-23 06:12:44,636 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 195 transitions. [2022-07-23 06:12:44,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-07-23 06:12:44,636 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:12:44,636 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 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] [2022-07-23 06:12:44,659 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2022-07-23 06:12:44,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:12:44,837 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-23 06:12:44,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:12:44,837 INFO L85 PathProgramCache]: Analyzing trace with hash -185148971, now seen corresponding path program 1 times [2022-07-23 06:12:44,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:12:44,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [541514868] [2022-07-23 06:12:44,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:12:44,838 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:12:44,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:12:44,839 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:12:44,840 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2022-07-23 06:12:44,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:12:44,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-23 06:12:44,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:12:45,009 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-23 06:12:45,010 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:12:45,099 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-23 06:12:45,099 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:12:45,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [541514868] [2022-07-23 06:12:45,099 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [541514868] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 06:12:45,100 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 06:12:45,100 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 13 [2022-07-23 06:12:45,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68477359] [2022-07-23 06:12:45,100 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 06:12:45,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-23 06:12:45,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:12:45,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-23 06:12:45,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2022-07-23 06:12:45,101 INFO L87 Difference]: Start difference. First operand 158 states and 195 transitions. Second operand has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-23 06:12:45,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:12:45,374 INFO L93 Difference]: Finished difference Result 187 states and 219 transitions. [2022-07-23 06:12:45,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-23 06:12:45,375 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 36 [2022-07-23 06:12:45,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:12:45,376 INFO L225 Difference]: With dead ends: 187 [2022-07-23 06:12:45,376 INFO L226 Difference]: Without dead ends: 187 [2022-07-23 06:12:45,376 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2022-07-23 06:12:45,377 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 365 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 365 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-23 06:12:45,377 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [365 Valid, 273 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-23 06:12:45,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2022-07-23 06:12:45,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 155. [2022-07-23 06:12:45,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 131 states have (on average 1.3206106870229009) internal successors, (173), 143 states have internal predecessors, (173), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (9), 8 states have call predecessors, (9), 5 states have call successors, (9) [2022-07-23 06:12:45,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 187 transitions. [2022-07-23 06:12:45,380 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 187 transitions. Word has length 36 [2022-07-23 06:12:45,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:12:45,380 INFO L495 AbstractCegarLoop]: Abstraction has 155 states and 187 transitions. [2022-07-23 06:12:45,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-23 06:12:45,381 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 187 transitions. [2022-07-23 06:12:45,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-07-23 06:12:45,381 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:12:45,381 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:12:45,405 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2022-07-23 06:12:45,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:12:45,582 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-23 06:12:45,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:12:45,582 INFO L85 PathProgramCache]: Analyzing trace with hash -1645803514, now seen corresponding path program 3 times [2022-07-23 06:12:45,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:12:45,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [465314290] [2022-07-23 06:12:45,582 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-23 06:12:45,582 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:12:45,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:12:45,584 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:12:45,585 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2022-07-23 06:12:45,705 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-07-23 06:12:45,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 06:12:45,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-23 06:12:45,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:12:45,731 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-23 06:12:46,345 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 06:12:46,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:12:49,270 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 06:12:49,271 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:12:49,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [465314290] [2022-07-23 06:12:49,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [465314290] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 06:12:49,271 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 06:12:49,271 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 31 [2022-07-23 06:12:49,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604840440] [2022-07-23 06:12:49,271 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 06:12:49,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-07-23 06:12:49,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:12:49,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-07-23 06:12:49,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=810, Unknown=0, NotChecked=0, Total=992 [2022-07-23 06:12:49,272 INFO L87 Difference]: Start difference. First operand 155 states and 187 transitions. Second operand has 32 states, 29 states have (on average 2.206896551724138) internal successors, (64), 30 states have internal predecessors, (64), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-23 06:13:02,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:13:02,327 INFO L93 Difference]: Finished difference Result 313 states and 398 transitions. [2022-07-23 06:13:02,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-07-23 06:13:02,328 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 29 states have (on average 2.206896551724138) internal successors, (64), 30 states have internal predecessors, (64), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 35 [2022-07-23 06:13:02,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:13:02,330 INFO L225 Difference]: With dead ends: 313 [2022-07-23 06:13:02,330 INFO L226 Difference]: Without dead ends: 313 [2022-07-23 06:13:02,331 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1282 ImplicationChecksByTransitivity, 12.1s TimeCoverageRelationStatistics Valid=1097, Invalid=4015, Unknown=0, NotChecked=0, Total=5112 [2022-07-23 06:13:02,332 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 430 mSDsluCounter, 992 mSDsCounter, 0 mSdLazyCounter, 1128 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 430 SdHoareTripleChecker+Valid, 1058 SdHoareTripleChecker+Invalid, 1464 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 1128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 255 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-07-23 06:13:02,332 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [430 Valid, 1058 Invalid, 1464 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 1128 Invalid, 0 Unknown, 255 Unchecked, 3.4s Time] [2022-07-23 06:13:02,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2022-07-23 06:13:02,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 179. [2022-07-23 06:13:02,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 155 states have (on average 1.3225806451612903) internal successors, (205), 167 states have internal predecessors, (205), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (9), 8 states have call predecessors, (9), 5 states have call successors, (9) [2022-07-23 06:13:02,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 219 transitions. [2022-07-23 06:13:02,344 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 219 transitions. Word has length 35 [2022-07-23 06:13:02,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:13:02,344 INFO L495 AbstractCegarLoop]: Abstraction has 179 states and 219 transitions. [2022-07-23 06:13:02,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 29 states have (on average 2.206896551724138) internal successors, (64), 30 states have internal predecessors, (64), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-23 06:13:02,344 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 219 transitions. [2022-07-23 06:13:02,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-07-23 06:13:02,344 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:13:02,345 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 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] [2022-07-23 06:13:02,352 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2022-07-23 06:13:02,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:13:02,552 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-23 06:13:02,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:13:02,553 INFO L85 PathProgramCache]: Analyzing trace with hash 2145816479, now seen corresponding path program 1 times [2022-07-23 06:13:02,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:13:02,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2104585287] [2022-07-23 06:13:02,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:13:02,553 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:13:02,554 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:13:02,555 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:13:02,560 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2022-07-23 06:13:02,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:13:02,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-23 06:13:02,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:13:02,785 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-23 06:13:02,785 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:13:02,947 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-23 06:13:02,947 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:13:02,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2104585287] [2022-07-23 06:13:02,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2104585287] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 06:13:02,948 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 06:13:02,948 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2022-07-23 06:13:02,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278640628] [2022-07-23 06:13:02,948 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 06:13:02,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-23 06:13:02,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:13:02,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-23 06:13:02,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2022-07-23 06:13:02,950 INFO L87 Difference]: Start difference. First operand 179 states and 219 transitions. Second operand has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 states have internal predecessors, (55), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-23 06:13:03,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:13:03,462 INFO L93 Difference]: Finished difference Result 201 states and 240 transitions. [2022-07-23 06:13:03,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-23 06:13:03,463 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 states have internal predecessors, (55), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 37 [2022-07-23 06:13:03,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:13:03,464 INFO L225 Difference]: With dead ends: 201 [2022-07-23 06:13:03,464 INFO L226 Difference]: Without dead ends: 201 [2022-07-23 06:13:03,465 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=166, Invalid=484, Unknown=0, NotChecked=0, Total=650 [2022-07-23 06:13:03,465 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 351 mSDsluCounter, 354 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 351 SdHoareTripleChecker+Valid, 409 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-23 06:13:03,465 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [351 Valid, 409 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-23 06:13:03,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2022-07-23 06:13:03,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 193. [2022-07-23 06:13:03,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 169 states have (on average 1.2958579881656804) internal successors, (219), 180 states have internal predecessors, (219), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (9), 9 states have call predecessors, (9), 5 states have call successors, (9) [2022-07-23 06:13:03,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 233 transitions. [2022-07-23 06:13:03,469 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 233 transitions. Word has length 37 [2022-07-23 06:13:03,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:13:03,469 INFO L495 AbstractCegarLoop]: Abstraction has 193 states and 233 transitions. [2022-07-23 06:13:03,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 states have internal predecessors, (55), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-23 06:13:03,469 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 233 transitions. [2022-07-23 06:13:03,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-07-23 06:13:03,470 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:13:03,470 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:13:03,489 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2022-07-23 06:13:03,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:13:03,681 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-23 06:13:03,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:13:03,682 INFO L85 PathProgramCache]: Analyzing trace with hash 731071653, now seen corresponding path program 2 times [2022-07-23 06:13:03,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:13:03,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1445740269] [2022-07-23 06:13:03,682 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-23 06:13:03,682 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:13:03,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:13:03,684 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:13:03,685 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2022-07-23 06:13:03,792 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-23 06:13:03,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 06:13:03,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 40 conjunts are in the unsatisfiable core [2022-07-23 06:13:03,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:13:03,834 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-23 06:13:03,844 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-23 06:13:04,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 06:13:04,354 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2022-07-23 06:13:04,362 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-23 06:13:04,362 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 12 [2022-07-23 06:13:04,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 06:13:04,656 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2022-07-23 06:13:04,665 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-23 06:13:04,665 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 12 [2022-07-23 06:13:04,756 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-23 06:13:04,757 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:13:05,427 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:13:05,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1445740269] [2022-07-23 06:13:05,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1445740269] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 06:13:05,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [45760933] [2022-07-23 06:13:05,428 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-23 06:13:05,428 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-23 06:13:05,428 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-23 06:13:05,429 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-23 06:13:05,430 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (38)] Waiting until timeout for monitored process [2022-07-23 06:13:05,583 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-23 06:13:05,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 06:13:05,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 40 conjunts are in the unsatisfiable core [2022-07-23 06:13:05,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:13:05,600 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-23 06:13:05,606 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-23 06:13:07,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 06:13:07,916 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2022-07-23 06:13:07,925 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-23 06:13:07,925 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 12 [2022-07-23 06:13:08,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 06:13:08,084 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2022-07-23 06:13:08,093 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-23 06:13:08,093 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 12 [2022-07-23 06:13:08,127 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-23 06:13:08,127 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:13:08,461 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [45760933] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 06:13:08,461 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 06:13:08,461 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2022-07-23 06:13:08,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279617119] [2022-07-23 06:13:08,461 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 06:13:08,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-23 06:13:08,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:13:08,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-23 06:13:08,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2022-07-23 06:13:08,462 INFO L87 Difference]: Start difference. First operand 193 states and 233 transitions. Second operand has 20 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 19 states have internal predecessors, (32), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-23 06:13:08,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:13:08,920 INFO L93 Difference]: Finished difference Result 221 states and 265 transitions. [2022-07-23 06:13:08,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-23 06:13:08,921 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 19 states have internal predecessors, (32), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 39 [2022-07-23 06:13:08,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:13:08,922 INFO L225 Difference]: With dead ends: 221 [2022-07-23 06:13:08,922 INFO L226 Difference]: Without dead ends: 221 [2022-07-23 06:13:08,922 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 57 SyntacticMatches, 7 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=93, Invalid=609, Unknown=0, NotChecked=0, Total=702 [2022-07-23 06:13:08,922 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 69 mSDsluCounter, 559 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 617 SdHoareTripleChecker+Invalid, 514 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 200 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-23 06:13:08,923 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 617 Invalid, 514 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 300 Invalid, 0 Unknown, 200 Unchecked, 0.3s Time] [2022-07-23 06:13:08,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2022-07-23 06:13:08,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 205. [2022-07-23 06:13:08,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 179 states have (on average 1.2849162011173185) internal successors, (230), 190 states have internal predecessors, (230), 7 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (13), 11 states have call predecessors, (13), 7 states have call successors, (13) [2022-07-23 06:13:08,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 250 transitions. [2022-07-23 06:13:08,926 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 250 transitions. Word has length 39 [2022-07-23 06:13:08,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:13:08,926 INFO L495 AbstractCegarLoop]: Abstraction has 205 states and 250 transitions. [2022-07-23 06:13:08,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 19 states have internal predecessors, (32), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-23 06:13:08,926 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 250 transitions. [2022-07-23 06:13:08,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-07-23 06:13:08,926 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:13:08,927 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 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] [2022-07-23 06:13:08,950 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (37)] Forceful destruction successful, exit code 0 [2022-07-23 06:13:09,130 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (38)] Forceful destruction successful, exit code 0 [2022-07-23 06:13:09,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2022-07-23 06:13:09,331 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-23 06:13:09,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:13:09,332 INFO L85 PathProgramCache]: Analyzing trace with hash -275846323, now seen corresponding path program 1 times [2022-07-23 06:13:09,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:13:09,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [291435568] [2022-07-23 06:13:09,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:13:09,332 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:13:09,332 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:13:09,334 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:13:09,335 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2022-07-23 06:13:09,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:13:09,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-23 06:13:09,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:13:09,437 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-23 06:13:09,484 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-23 06:13:09,520 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-07-23 06:13:09,641 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 15 treesize of output 7 [2022-07-23 06:13:09,669 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-23 06:13:09,683 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 06:13:09,683 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:13:09,806 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:13:09,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [291435568] [2022-07-23 06:13:09,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [291435568] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 06:13:09,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1419601103] [2022-07-23 06:13:09,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:13:09,806 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-23 06:13:09,807 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-23 06:13:09,808 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-23 06:13:09,809 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (40)] Waiting until timeout for monitored process [2022-07-23 06:13:09,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:13:09,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-23 06:13:09,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:13:09,946 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-23 06:13:10,041 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-23 06:13:10,100 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-07-23 06:13:10,287 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 15 treesize of output 7 [2022-07-23 06:13:10,301 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-23 06:13:10,316 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 06:13:10,317 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:13:10,378 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1419601103] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 06:13:10,378 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 06:13:10,378 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2022-07-23 06:13:10,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420614288] [2022-07-23 06:13:10,379 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 06:13:10,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-23 06:13:10,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:13:10,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-23 06:13:10,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2022-07-23 06:13:10,380 INFO L87 Difference]: Start difference. First operand 205 states and 250 transitions. Second operand has 17 states, 16 states have (on average 3.5625) internal successors, (57), 15 states have internal predecessors, (57), 3 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-23 06:13:10,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:13:10,811 INFO L93 Difference]: Finished difference Result 234 states and 280 transitions. [2022-07-23 06:13:10,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-23 06:13:10,812 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 3.5625) internal successors, (57), 15 states have internal predecessors, (57), 3 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 40 [2022-07-23 06:13:10,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:13:10,813 INFO L225 Difference]: With dead ends: 234 [2022-07-23 06:13:10,813 INFO L226 Difference]: Without dead ends: 234 [2022-07-23 06:13:10,813 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 92 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=107, Invalid=445, Unknown=0, NotChecked=0, Total=552 [2022-07-23 06:13:10,813 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 77 mSDsluCounter, 482 mSDsCounter, 0 mSdLazyCounter, 356 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 540 SdHoareTripleChecker+Invalid, 458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 91 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-23 06:13:10,814 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 540 Invalid, 458 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 356 Invalid, 0 Unknown, 91 Unchecked, 0.3s Time] [2022-07-23 06:13:10,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2022-07-23 06:13:10,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 225. [2022-07-23 06:13:10,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 199 states have (on average 1.2613065326633166) internal successors, (251), 210 states have internal predecessors, (251), 7 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (13), 11 states have call predecessors, (13), 7 states have call successors, (13) [2022-07-23 06:13:10,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 271 transitions. [2022-07-23 06:13:10,817 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 271 transitions. Word has length 40 [2022-07-23 06:13:10,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:13:10,818 INFO L495 AbstractCegarLoop]: Abstraction has 225 states and 271 transitions. [2022-07-23 06:13:10,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 3.5625) internal successors, (57), 15 states have internal predecessors, (57), 3 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-23 06:13:10,818 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 271 transitions. [2022-07-23 06:13:10,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-07-23 06:13:10,818 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:13:10,818 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:13:10,840 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (39)] Forceful destruction successful, exit code 0 [2022-07-23 06:13:11,037 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (40)] Forceful destruction successful, exit code 0 [2022-07-23 06:13:11,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2022-07-23 06:13:11,229 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-23 06:13:11,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:13:11,230 INFO L85 PathProgramCache]: Analyzing trace with hash -72017103, now seen corresponding path program 1 times [2022-07-23 06:13:11,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:13:11,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [770723358] [2022-07-23 06:13:11,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:13:11,231 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:13:11,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:13:11,232 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:13:11,234 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2022-07-23 06:13:11,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:13:11,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-23 06:13:11,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:13:11,496 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-23 06:13:11,497 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:13:12,062 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2022-07-23 06:13:12,480 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-23 06:13:12,480 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:13:12,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [770723358] [2022-07-23 06:13:12,480 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [770723358] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 06:13:12,480 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 06:13:12,480 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2022-07-23 06:13:12,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022633891] [2022-07-23 06:13:12,481 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 06:13:12,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-23 06:13:12,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:13:12,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-23 06:13:12,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2022-07-23 06:13:12,482 INFO L87 Difference]: Start difference. First operand 225 states and 271 transitions. Second operand has 18 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-23 06:13:14,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:13:14,607 INFO L93 Difference]: Finished difference Result 294 states and 330 transitions. [2022-07-23 06:13:14,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-23 06:13:14,608 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 41 [2022-07-23 06:13:14,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:13:14,610 INFO L225 Difference]: With dead ends: 294 [2022-07-23 06:13:14,610 INFO L226 Difference]: Without dead ends: 294 [2022-07-23 06:13:14,610 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=128, Invalid=628, Unknown=0, NotChecked=0, Total=756 [2022-07-23 06:13:14,610 INFO L413 NwaCegarLoop]: 87 mSDtfsCounter, 418 mSDsluCounter, 868 mSDsCounter, 0 mSdLazyCounter, 407 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 418 SdHoareTripleChecker+Valid, 955 SdHoareTripleChecker+Invalid, 486 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 407 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-07-23 06:13:14,610 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [418 Valid, 955 Invalid, 486 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 407 Invalid, 0 Unknown, 45 Unchecked, 1.4s Time] [2022-07-23 06:13:14,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2022-07-23 06:13:14,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 222. [2022-07-23 06:13:14,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 197 states have (on average 1.2385786802030456) internal successors, (244), 207 states have internal predecessors, (244), 7 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (13), 11 states have call predecessors, (13), 7 states have call successors, (13) [2022-07-23 06:13:14,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 264 transitions. [2022-07-23 06:13:14,615 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 264 transitions. Word has length 41 [2022-07-23 06:13:14,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:13:14,615 INFO L495 AbstractCegarLoop]: Abstraction has 222 states and 264 transitions. [2022-07-23 06:13:14,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-23 06:13:14,615 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 264 transitions. [2022-07-23 06:13:14,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-07-23 06:13:14,616 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:13:14,616 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 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] [2022-07-23 06:13:14,626 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (41)] Forceful destruction successful, exit code 0 [2022-07-23 06:13:14,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:13:14,824 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-23 06:13:14,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:13:14,824 INFO L85 PathProgramCache]: Analyzing trace with hash 1776836543, now seen corresponding path program 2 times [2022-07-23 06:13:14,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:13:14,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [528429592] [2022-07-23 06:13:14,825 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-23 06:13:14,825 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:13:14,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:13:14,826 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:13:14,828 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2022-07-23 06:13:14,924 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-23 06:13:14,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 06:13:14,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-23 06:13:14,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:13:14,958 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-23 06:13:15,021 INFO L356 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2022-07-23 06:13:15,021 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2022-07-23 06:13:15,126 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 15 treesize of output 7 [2022-07-23 06:13:15,152 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-23 06:13:15,169 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 06:13:15,169 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:13:17,213 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 36 [2022-07-23 06:13:20,961 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 21 [2022-07-23 06:13:20,962 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 74 [2022-07-23 06:13:21,010 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-23 06:13:21,010 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:13:21,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [528429592] [2022-07-23 06:13:21,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [528429592] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 06:13:21,011 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 06:13:21,011 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2022-07-23 06:13:21,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197849233] [2022-07-23 06:13:21,011 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 06:13:21,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-23 06:13:21,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:13:21,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-23 06:13:21,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=312, Unknown=3, NotChecked=0, Total=380 [2022-07-23 06:13:21,013 INFO L87 Difference]: Start difference. First operand 222 states and 264 transitions. Second operand has 20 states, 19 states have (on average 3.263157894736842) internal successors, (62), 19 states have internal predecessors, (62), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-23 06:13:21,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:13:21,276 INFO L93 Difference]: Finished difference Result 253 states and 295 transitions. [2022-07-23 06:13:21,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-23 06:13:21,277 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 3.263157894736842) internal successors, (62), 19 states have internal predecessors, (62), 3 states have call successors, (3), 2 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 40 [2022-07-23 06:13:21,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:13:21,278 INFO L225 Difference]: With dead ends: 253 [2022-07-23 06:13:21,278 INFO L226 Difference]: Without dead ends: 253 [2022-07-23 06:13:21,278 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=96, Invalid=453, Unknown=3, NotChecked=0, Total=552 [2022-07-23 06:13:21,279 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 78 mSDsluCounter, 551 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 608 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 106 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-23 06:13:21,280 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 608 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 174 Invalid, 0 Unknown, 106 Unchecked, 0.2s Time] [2022-07-23 06:13:21,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2022-07-23 06:13:21,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 241. [2022-07-23 06:13:21,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 214 states have (on average 1.2289719626168225) internal successors, (263), 224 states have internal predecessors, (263), 7 states have call successors, (7), 4 states have call predecessors, (7), 6 states have return successors, (13), 12 states have call predecessors, (13), 7 states have call successors, (13) [2022-07-23 06:13:21,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 283 transitions. [2022-07-23 06:13:21,291 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 283 transitions. Word has length 40 [2022-07-23 06:13:21,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:13:21,291 INFO L495 AbstractCegarLoop]: Abstraction has 241 states and 283 transitions. [2022-07-23 06:13:21,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 3.263157894736842) internal successors, (62), 19 states have internal predecessors, (62), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-23 06:13:21,291 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 283 transitions. [2022-07-23 06:13:21,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-07-23 06:13:21,292 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:13:21,292 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 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] [2022-07-23 06:13:21,314 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (42)] Forceful destruction successful, exit code 0 [2022-07-23 06:13:21,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:13:21,500 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-23 06:13:21,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:13:21,501 INFO L85 PathProgramCache]: Analyzing trace with hash 1776836544, now seen corresponding path program 1 times [2022-07-23 06:13:21,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:13:21,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [903601508] [2022-07-23 06:13:21,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:13:21,501 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:13:21,502 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:13:21,502 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:13:21,504 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2022-07-23 06:13:21,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:13:21,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-23 06:13:21,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:13:21,641 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-23 06:13:22,200 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 06:13:22,201 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:13:23,534 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 06:13:23,535 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:13:23,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [903601508] [2022-07-23 06:13:23,535 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [903601508] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 06:13:23,535 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 06:13:23,535 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 23 [2022-07-23 06:13:23,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823845636] [2022-07-23 06:13:23,535 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 06:13:23,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-23 06:13:23,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:13:23,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-23 06:13:23,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2022-07-23 06:13:23,536 INFO L87 Difference]: Start difference. First operand 241 states and 283 transitions. Second operand has 24 states, 22 states have (on average 3.1818181818181817) internal successors, (70), 22 states have internal predecessors, (70), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-23 06:13:25,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:13:25,789 INFO L93 Difference]: Finished difference Result 326 states and 368 transitions. [2022-07-23 06:13:25,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-23 06:13:25,790 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 3.1818181818181817) internal successors, (70), 22 states have internal predecessors, (70), 4 states have call successors, (4), 3 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 [2022-07-23 06:13:25,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:13:25,791 INFO L225 Difference]: With dead ends: 326 [2022-07-23 06:13:25,791 INFO L226 Difference]: Without dead ends: 326 [2022-07-23 06:13:25,792 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=152, Invalid=1038, Unknown=0, NotChecked=0, Total=1190 [2022-07-23 06:13:25,792 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 230 mSDsluCounter, 1145 mSDsCounter, 0 mSdLazyCounter, 376 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 1228 SdHoareTripleChecker+Invalid, 907 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 510 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-23 06:13:25,792 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [230 Valid, 1228 Invalid, 907 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 376 Invalid, 0 Unknown, 510 Unchecked, 1.1s Time] [2022-07-23 06:13:25,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2022-07-23 06:13:25,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 242. [2022-07-23 06:13:25,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 215 states have (on average 1.2325581395348837) internal successors, (265), 225 states have internal predecessors, (265), 7 states have call successors, (7), 4 states have call predecessors, (7), 6 states have return successors, (13), 12 states have call predecessors, (13), 7 states have call successors, (13) [2022-07-23 06:13:25,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 285 transitions. [2022-07-23 06:13:25,795 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 285 transitions. Word has length 40 [2022-07-23 06:13:25,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:13:25,796 INFO L495 AbstractCegarLoop]: Abstraction has 242 states and 285 transitions. [2022-07-23 06:13:25,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 3.1818181818181817) internal successors, (70), 22 states have internal predecessors, (70), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-23 06:13:25,796 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 285 transitions. [2022-07-23 06:13:25,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-07-23 06:13:25,796 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:13:25,796 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 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] [2022-07-23 06:13:25,806 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (43)] Forceful destruction successful, exit code 0 [2022-07-23 06:13:26,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:13:26,004 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-23 06:13:26,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:13:26,005 INFO L85 PathProgramCache]: Analyzing trace with hash 392679819, now seen corresponding path program 1 times [2022-07-23 06:13:26,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:13:26,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1080749552] [2022-07-23 06:13:26,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:13:26,005 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:13:26,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:13:26,006 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:13:26,008 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2022-07-23 06:13:26,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:13:26,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 28 conjunts are in the unsatisfiable core [2022-07-23 06:13:26,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:13:26,124 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-23 06:13:26,257 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-23 06:13:26,258 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 18 treesize of output 25 [2022-07-23 06:13:26,345 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-23 06:13:26,414 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-07-23 06:13:26,442 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 17 [2022-07-23 06:13:26,452 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 06:13:26,452 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:13:26,560 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 34 [2022-07-23 06:13:31,158 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:13:31,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1080749552] [2022-07-23 06:13:31,158 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1080749552] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 06:13:31,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [721915388] [2022-07-23 06:13:31,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:13:31,158 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-23 06:13:31,158 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-23 06:13:31,159 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-23 06:13:31,160 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (45)] Waiting until timeout for monitored process [2022-07-23 06:13:31,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:13:31,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 31 conjunts are in the unsatisfiable core [2022-07-23 06:13:31,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:13:31,328 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-23 06:13:31,496 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-23 06:13:31,496 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 12 [2022-07-23 06:13:31,587 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-23 06:13:31,703 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-07-23 06:13:31,728 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 17 [2022-07-23 06:13:31,740 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 06:13:31,741 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:13:31,816 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 42 [2022-07-23 06:13:31,824 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 06:13:31,824 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 53 [2022-07-23 06:13:34,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [721915388] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 06:13:34,083 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 06:13:34,083 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 21 [2022-07-23 06:13:34,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007250548] [2022-07-23 06:13:34,083 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 06:13:34,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-23 06:13:34,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:13:34,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-23 06:13:34,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=712, Unknown=1, NotChecked=0, Total=812 [2022-07-23 06:13:34,084 INFO L87 Difference]: Start difference. First operand 242 states and 285 transitions. Second operand has 22 states, 21 states have (on average 2.761904761904762) internal successors, (58), 18 states have internal predecessors, (58), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-23 06:13:34,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:13:34,773 INFO L93 Difference]: Finished difference Result 263 states and 307 transitions. [2022-07-23 06:13:34,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-23 06:13:34,773 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.761904761904762) internal successors, (58), 18 states have internal predecessors, (58), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 41 [2022-07-23 06:13:34,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:13:34,774 INFO L225 Difference]: With dead ends: 263 [2022-07-23 06:13:34,774 INFO L226 Difference]: Without dead ends: 263 [2022-07-23 06:13:34,775 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 86 SyntacticMatches, 5 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=172, Invalid=1087, Unknown=1, NotChecked=0, Total=1260 [2022-07-23 06:13:34,775 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 138 mSDsluCounter, 556 mSDsCounter, 0 mSdLazyCounter, 538 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 617 SdHoareTripleChecker+Invalid, 580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 538 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 20 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-23 06:13:34,775 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 617 Invalid, 580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 538 Invalid, 0 Unknown, 20 Unchecked, 0.5s Time] [2022-07-23 06:13:34,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2022-07-23 06:13:34,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 236. [2022-07-23 06:13:34,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 209 states have (on average 1.244019138755981) internal successors, (260), 219 states have internal predecessors, (260), 7 states have call successors, (7), 4 states have call predecessors, (7), 6 states have return successors, (13), 12 states have call predecessors, (13), 7 states have call successors, (13) [2022-07-23 06:13:34,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 280 transitions. [2022-07-23 06:13:34,778 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 280 transitions. Word has length 41 [2022-07-23 06:13:34,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:13:34,778 INFO L495 AbstractCegarLoop]: Abstraction has 236 states and 280 transitions. [2022-07-23 06:13:34,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.761904761904762) internal successors, (58), 18 states have internal predecessors, (58), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-23 06:13:34,779 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 280 transitions. [2022-07-23 06:13:34,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-07-23 06:13:34,779 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:13:34,779 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 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] [2022-07-23 06:13:34,800 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (45)] Ended with exit code 0 [2022-07-23 06:13:35,008 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (44)] Forceful destruction successful, exit code 0 [2022-07-23 06:13:35,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:13:35,208 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-23 06:13:35,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:13:35,208 INFO L85 PathProgramCache]: Analyzing trace with hash -503073279, now seen corresponding path program 1 times [2022-07-23 06:13:35,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:13:35,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1738623213] [2022-07-23 06:13:35,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:13:35,208 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:13:35,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:13:35,210 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:13:35,213 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (46)] Waiting until timeout for monitored process [2022-07-23 06:13:35,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:13:35,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-23 06:13:35,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:13:35,370 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-23 06:13:35,557 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-07-23 06:13:35,750 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-23 06:13:35,751 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:13:36,538 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-23 06:13:36,539 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:13:36,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1738623213] [2022-07-23 06:13:36,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1738623213] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 06:13:36,539 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 06:13:36,539 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 29 [2022-07-23 06:13:36,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823044871] [2022-07-23 06:13:36,539 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 06:13:36,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-07-23 06:13:36,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:13:36,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-07-23 06:13:36,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=687, Unknown=0, NotChecked=0, Total=812 [2022-07-23 06:13:36,540 INFO L87 Difference]: Start difference. First operand 236 states and 280 transitions. Second operand has 29 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 27 states have internal predecessors, (58), 4 states have call successors, (4), 1 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-23 06:13:38,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:13:38,170 INFO L93 Difference]: Finished difference Result 434 states and 483 transitions. [2022-07-23 06:13:38,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-23 06:13:38,170 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 27 states have internal predecessors, (58), 4 states have call successors, (4), 1 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 41 [2022-07-23 06:13:38,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:13:38,171 INFO L225 Difference]: With dead ends: 434 [2022-07-23 06:13:38,171 INFO L226 Difference]: Without dead ends: 434 [2022-07-23 06:13:38,172 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 415 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=521, Invalid=2029, Unknown=0, NotChecked=0, Total=2550 [2022-07-23 06:13:38,175 INFO L413 NwaCegarLoop]: 131 mSDtfsCounter, 614 mSDsluCounter, 1439 mSDsCounter, 0 mSdLazyCounter, 668 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 614 SdHoareTripleChecker+Valid, 1570 SdHoareTripleChecker+Invalid, 853 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 668 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 96 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-23 06:13:38,180 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [614 Valid, 1570 Invalid, 853 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 668 Invalid, 0 Unknown, 96 Unchecked, 0.8s Time] [2022-07-23 06:13:38,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2022-07-23 06:13:38,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 227. [2022-07-23 06:13:38,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 200 states have (on average 1.24) internal successors, (248), 210 states have internal predecessors, (248), 7 states have call successors, (7), 4 states have call predecessors, (7), 6 states have return successors, (13), 12 states have call predecessors, (13), 7 states have call successors, (13) [2022-07-23 06:13:38,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 268 transitions. [2022-07-23 06:13:38,197 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 268 transitions. Word has length 41 [2022-07-23 06:13:38,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:13:38,197 INFO L495 AbstractCegarLoop]: Abstraction has 227 states and 268 transitions. [2022-07-23 06:13:38,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 27 states have internal predecessors, (58), 4 states have call successors, (4), 1 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-23 06:13:38,197 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 268 transitions. [2022-07-23 06:13:38,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-07-23 06:13:38,203 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:13:38,203 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:13:38,210 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (46)] Forceful destruction successful, exit code 0 [2022-07-23 06:13:38,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:13:38,410 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-23 06:13:38,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:13:38,411 INFO L85 PathProgramCache]: Analyzing trace with hash 2062437122, now seen corresponding path program 1 times [2022-07-23 06:13:38,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:13:38,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [183581691] [2022-07-23 06:13:38,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:13:38,411 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:13:38,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:13:38,413 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:13:38,414 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (47)] Waiting until timeout for monitored process [2022-07-23 06:13:38,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:13:38,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-23 06:13:38,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:13:38,582 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-23 06:13:38,733 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-23 06:13:38,747 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-23 06:13:38,747 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:13:38,901 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-23 06:13:38,901 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:13:38,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [183581691] [2022-07-23 06:13:38,901 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [183581691] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 06:13:38,901 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 06:13:38,901 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 17 [2022-07-23 06:13:38,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248288030] [2022-07-23 06:13:38,902 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 06:13:38,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-23 06:13:38,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:13:38,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-23 06:13:38,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2022-07-23 06:13:38,903 INFO L87 Difference]: Start difference. First operand 227 states and 268 transitions. Second operand has 18 states, 17 states have (on average 3.0) internal successors, (51), 15 states have internal predecessors, (51), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-07-23 06:13:39,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:13:39,842 INFO L93 Difference]: Finished difference Result 323 states and 357 transitions. [2022-07-23 06:13:39,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-07-23 06:13:39,843 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 3.0) internal successors, (51), 15 states have internal predecessors, (51), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 42 [2022-07-23 06:13:39,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:13:39,844 INFO L225 Difference]: With dead ends: 323 [2022-07-23 06:13:39,844 INFO L226 Difference]: Without dead ends: 323 [2022-07-23 06:13:39,845 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=211, Invalid=1271, Unknown=0, NotChecked=0, Total=1482 [2022-07-23 06:13:39,845 INFO L413 NwaCegarLoop]: 94 mSDtfsCounter, 446 mSDsluCounter, 863 mSDsCounter, 0 mSdLazyCounter, 397 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 446 SdHoareTripleChecker+Valid, 957 SdHoareTripleChecker+Invalid, 476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 42 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-23 06:13:39,845 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [446 Valid, 957 Invalid, 476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 397 Invalid, 0 Unknown, 42 Unchecked, 0.4s Time] [2022-07-23 06:13:39,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2022-07-23 06:13:39,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 235. [2022-07-23 06:13:39,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 206 states have (on average 1.2378640776699028) internal successors, (255), 217 states have internal predecessors, (255), 7 states have call successors, (7), 5 states have call predecessors, (7), 8 states have return successors, (13), 12 states have call predecessors, (13), 7 states have call successors, (13) [2022-07-23 06:13:39,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 275 transitions. [2022-07-23 06:13:39,869 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 275 transitions. Word has length 42 [2022-07-23 06:13:39,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:13:39,870 INFO L495 AbstractCegarLoop]: Abstraction has 235 states and 275 transitions. [2022-07-23 06:13:39,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 3.0) internal successors, (51), 15 states have internal predecessors, (51), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-07-23 06:13:39,870 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 275 transitions. [2022-07-23 06:13:39,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-07-23 06:13:39,871 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:13:39,871 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 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] [2022-07-23 06:13:39,892 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (47)] Forceful destruction successful, exit code 0 [2022-07-23 06:13:40,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:13:40,078 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-23 06:13:40,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:13:40,078 INFO L85 PathProgramCache]: Analyzing trace with hash -752641937, now seen corresponding path program 1 times [2022-07-23 06:13:40,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:13:40,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [583060812] [2022-07-23 06:13:40,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:13:40,079 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:13:40,079 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:13:40,096 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:13:40,098 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (48)] Waiting until timeout for monitored process [2022-07-23 06:13:40,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:13:40,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-23 06:13:40,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:13:40,201 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-23 06:13:40,311 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-23 06:13:40,321 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 06:13:40,321 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:13:44,413 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-07-23 06:13:44,415 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-07-23 06:13:44,450 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-23 06:13:44,451 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:13:44,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [583060812] [2022-07-23 06:13:44,451 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [583060812] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 06:13:44,451 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 06:13:44,451 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2022-07-23 06:13:44,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662279708] [2022-07-23 06:13:44,451 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 06:13:44,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-23 06:13:44,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:13:44,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-23 06:13:44,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=124, Unknown=2, NotChecked=0, Total=156 [2022-07-23 06:13:44,454 INFO L87 Difference]: Start difference. First operand 235 states and 275 transitions. Second operand has 13 states, 12 states have (on average 4.416666666666667) internal successors, (53), 13 states have internal predecessors, (53), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-23 06:13:44,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:13:44,833 INFO L93 Difference]: Finished difference Result 262 states and 299 transitions. [2022-07-23 06:13:44,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-23 06:13:44,833 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 4.416666666666667) internal successors, (53), 13 states have internal predecessors, (53), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 41 [2022-07-23 06:13:44,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:13:44,834 INFO L225 Difference]: With dead ends: 262 [2022-07-23 06:13:44,834 INFO L226 Difference]: Without dead ends: 262 [2022-07-23 06:13:44,835 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=61, Invalid=243, Unknown=2, NotChecked=0, Total=306 [2022-07-23 06:13:44,835 INFO L413 NwaCegarLoop]: 88 mSDtfsCounter, 74 mSDsluCounter, 638 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 726 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 18 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-23 06:13:44,835 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 726 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 215 Invalid, 0 Unknown, 18 Unchecked, 0.3s Time] [2022-07-23 06:13:44,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2022-07-23 06:13:44,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 241. [2022-07-23 06:13:44,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 210 states have (on average 1.2380952380952381) internal successors, (260), 222 states have internal predecessors, (260), 7 states have call successors, (7), 6 states have call predecessors, (7), 10 states have return successors, (13), 12 states have call predecessors, (13), 7 states have call successors, (13) [2022-07-23 06:13:44,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 280 transitions. [2022-07-23 06:13:44,838 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 280 transitions. Word has length 41 [2022-07-23 06:13:44,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:13:44,838 INFO L495 AbstractCegarLoop]: Abstraction has 241 states and 280 transitions. [2022-07-23 06:13:44,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 4.416666666666667) internal successors, (53), 13 states have internal predecessors, (53), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-23 06:13:44,839 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 280 transitions. [2022-07-23 06:13:44,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-07-23 06:13:44,839 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:13:44,839 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:13:44,867 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (48)] Forceful destruction successful, exit code 0 [2022-07-23 06:13:45,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:13:45,040 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-23 06:13:45,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:13:45,040 INFO L85 PathProgramCache]: Analyzing trace with hash -1671328571, now seen corresponding path program 3 times [2022-07-23 06:13:45,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:13:45,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1952299088] [2022-07-23 06:13:45,041 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-23 06:13:45,041 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:13:45,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:13:45,042 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:13:45,043 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (49)] Waiting until timeout for monitored process [2022-07-23 06:13:45,155 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-23 06:13:45,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 06:13:45,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 39 conjunts are in the unsatisfiable core [2022-07-23 06:13:45,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:13:45,186 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-23 06:13:45,189 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-23 06:13:47,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 06:13:47,492 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-23 06:13:47,500 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-23 06:13:47,501 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 12 [2022-07-23 06:13:47,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 06:13:47,722 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-23 06:13:47,731 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-23 06:13:47,732 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 12 [2022-07-23 06:13:47,862 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-23 06:13:47,862 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:13:48,350 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:13:48,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1952299088] [2022-07-23 06:13:48,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1952299088] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 06:13:48,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [568045251] [2022-07-23 06:13:48,350 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-23 06:13:48,351 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-23 06:13:48,351 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-23 06:13:48,352 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-23 06:13:48,373 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (50)] Waiting until timeout for monitored process [2022-07-23 06:13:48,522 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-23 06:13:48,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 06:13:48,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 38 conjunts are in the unsatisfiable core [2022-07-23 06:13:48,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:13:48,540 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-23 06:13:48,544 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-23 06:13:48,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 06:13:48,785 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-23 06:13:48,796 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-23 06:13:48,796 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 12 [2022-07-23 06:13:48,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 06:13:48,951 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-23 06:13:48,961 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-23 06:13:48,962 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 12 [2022-07-23 06:13:49,017 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-23 06:13:49,017 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:13:49,418 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [568045251] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 06:13:49,418 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 06:13:49,418 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2022-07-23 06:13:49,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722094214] [2022-07-23 06:13:49,418 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 06:13:49,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-23 06:13:49,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:13:49,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-23 06:13:49,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=259, Unknown=1, NotChecked=0, Total=306 [2022-07-23 06:13:49,419 INFO L87 Difference]: Start difference. First operand 241 states and 280 transitions. Second operand has 16 states, 13 states have (on average 2.076923076923077) internal successors, (27), 15 states have internal predecessors, (27), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-23 06:13:50,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:13:50,022 INFO L93 Difference]: Finished difference Result 274 states and 312 transitions. [2022-07-23 06:13:50,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-23 06:13:50,022 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 2.076923076923077) internal successors, (27), 15 states have internal predecessors, (27), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 42 [2022-07-23 06:13:50,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:13:50,023 INFO L225 Difference]: With dead ends: 274 [2022-07-23 06:13:50,023 INFO L226 Difference]: Without dead ends: 274 [2022-07-23 06:13:50,024 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 70 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=88, Invalid=511, Unknown=1, NotChecked=0, Total=600 [2022-07-23 06:13:50,024 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 121 mSDsluCounter, 472 mSDsCounter, 0 mSdLazyCounter, 294 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 526 SdHoareTripleChecker+Invalid, 427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 120 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-23 06:13:50,024 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [121 Valid, 526 Invalid, 427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 294 Invalid, 0 Unknown, 120 Unchecked, 0.4s Time] [2022-07-23 06:13:50,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2022-07-23 06:13:50,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 232. [2022-07-23 06:13:50,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 202 states have (on average 1.2425742574257426) internal successors, (251), 215 states have internal predecessors, (251), 6 states have call successors, (6), 6 states have call predecessors, (6), 10 states have return successors, (11), 10 states have call predecessors, (11), 6 states have call successors, (11) [2022-07-23 06:13:50,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 268 transitions. [2022-07-23 06:13:50,027 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 268 transitions. Word has length 42 [2022-07-23 06:13:50,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:13:50,027 INFO L495 AbstractCegarLoop]: Abstraction has 232 states and 268 transitions. [2022-07-23 06:13:50,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 2.076923076923077) internal successors, (27), 15 states have internal predecessors, (27), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-23 06:13:50,028 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 268 transitions. [2022-07-23 06:13:50,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-07-23 06:13:50,028 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:13:50,028 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 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] [2022-07-23 06:13:50,035 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (49)] Ended with exit code 0 [2022-07-23 06:13:50,233 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (50)] Forceful destruction successful, exit code 0 [2022-07-23 06:13:50,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2022-07-23 06:13:50,429 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-23 06:13:50,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:13:50,429 INFO L85 PathProgramCache]: Analyzing trace with hash 1199661072, now seen corresponding path program 1 times [2022-07-23 06:13:50,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:13:50,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [988205979] [2022-07-23 06:13:50,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:13:50,430 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:13:50,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:13:50,431 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:13:50,432 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (51)] Waiting until timeout for monitored process [2022-07-23 06:13:50,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:13:50,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-23 06:13:50,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:13:50,673 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-23 06:13:50,740 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-23 06:13:50,740 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 8 [2022-07-23 06:13:50,967 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-23 06:13:51,158 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 06:13:51,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:13:51,480 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 22 [2022-07-23 06:13:51,481 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 44 [2022-07-23 06:13:54,144 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:13:54,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [988205979] [2022-07-23 06:13:54,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [988205979] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 06:13:54,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [186012731] [2022-07-23 06:13:54,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:13:54,145 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-23 06:13:54,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-23 06:13:54,146 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-23 06:13:54,147 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (52)] Waiting until timeout for monitored process [2022-07-23 06:13:54,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:13:54,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 28 conjunts are in the unsatisfiable core [2022-07-23 06:13:54,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:13:54,534 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-23 06:13:54,638 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-23 06:13:54,638 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 8 [2022-07-23 06:13:56,861 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-23 06:13:56,933 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 06:13:56,934 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:13:57,110 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 22 [2022-07-23 06:13:57,114 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 44 [2022-07-23 06:14:07,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [186012731] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 06:14:07,515 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 06:14:07,515 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2022-07-23 06:14:07,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639324743] [2022-07-23 06:14:07,516 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 06:14:07,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-23 06:14:07,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:14:07,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-23 06:14:07,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=814, Unknown=1, NotChecked=0, Total=930 [2022-07-23 06:14:07,517 INFO L87 Difference]: Start difference. First operand 232 states and 268 transitions. Second operand has 21 states, 20 states have (on average 2.95) internal successors, (59), 18 states have internal predecessors, (59), 3 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-23 06:14:07,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:14:07,620 INFO L93 Difference]: Finished difference Result 248 states and 282 transitions. [2022-07-23 06:14:07,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-23 06:14:07,620 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.95) internal successors, (59), 18 states have internal predecessors, (59), 3 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 42 [2022-07-23 06:14:07,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:14:07,621 INFO L225 Difference]: With dead ends: 248 [2022-07-23 06:14:07,621 INFO L226 Difference]: Without dead ends: 227 [2022-07-23 06:14:07,621 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 111 SyntacticMatches, 8 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 411 ImplicationChecksByTransitivity, 15.9s TimeCoverageRelationStatistics Valid=125, Invalid=930, Unknown=1, NotChecked=0, Total=1056 [2022-07-23 06:14:07,622 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 30 mSDsluCounter, 447 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 503 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 164 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 06:14:07,622 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 503 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 41 Invalid, 0 Unknown, 164 Unchecked, 0.1s Time] [2022-07-23 06:14:07,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2022-07-23 06:14:07,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 227. [2022-07-23 06:14:07,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 197 states have (on average 1.2436548223350254) internal successors, (245), 211 states have internal predecessors, (245), 6 states have call successors, (6), 6 states have call predecessors, (6), 10 states have return successors, (10), 9 states have call predecessors, (10), 6 states have call successors, (10) [2022-07-23 06:14:07,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 261 transitions. [2022-07-23 06:14:07,625 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 261 transitions. Word has length 42 [2022-07-23 06:14:07,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:14:07,625 INFO L495 AbstractCegarLoop]: Abstraction has 227 states and 261 transitions. [2022-07-23 06:14:07,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.95) internal successors, (59), 18 states have internal predecessors, (59), 3 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-23 06:14:07,625 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 261 transitions. [2022-07-23 06:14:07,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-07-23 06:14:07,625 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:14:07,625 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:14:07,634 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (51)] Ended with exit code 0 [2022-07-23 06:14:07,838 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (52)] Forceful destruction successful, exit code 0 [2022-07-23 06:14:08,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2022-07-23 06:14:08,035 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-23 06:14:08,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:14:08,036 INFO L85 PathProgramCache]: Analyzing trace with hash -488958544, now seen corresponding path program 1 times [2022-07-23 06:14:08,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:14:08,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1733041807] [2022-07-23 06:14:08,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:14:08,036 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:14:08,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:14:08,039 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:14:08,045 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (53)] Waiting until timeout for monitored process [2022-07-23 06:14:08,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:14:08,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-23 06:14:08,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:14:08,443 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-23 06:14:08,726 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-23 06:14:08,772 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-23 06:14:08,772 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:14:09,066 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-23 06:14:09,066 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:14:09,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1733041807] [2022-07-23 06:14:09,066 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1733041807] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 06:14:09,066 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 06:14:09,066 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 8] total 22 [2022-07-23 06:14:09,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536951899] [2022-07-23 06:14:09,067 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 06:14:09,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-23 06:14:09,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:14:09,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-23 06:14:09,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2022-07-23 06:14:09,067 INFO L87 Difference]: Start difference. First operand 227 states and 261 transitions. Second operand has 23 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 20 states have internal predecessors, (65), 5 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-23 06:14:09,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:14:09,550 INFO L93 Difference]: Finished difference Result 254 states and 289 transitions. [2022-07-23 06:14:09,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-23 06:14:09,551 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 20 states have internal predecessors, (65), 5 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 43 [2022-07-23 06:14:09,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:14:09,552 INFO L225 Difference]: With dead ends: 254 [2022-07-23 06:14:09,552 INFO L226 Difference]: Without dead ends: 254 [2022-07-23 06:14:09,553 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=128, Invalid=684, Unknown=0, NotChecked=0, Total=812 [2022-07-23 06:14:09,553 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 67 mSDsluCounter, 880 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 952 SdHoareTripleChecker+Invalid, 406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 298 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-23 06:14:09,553 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 952 Invalid, 406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 105 Invalid, 0 Unknown, 298 Unchecked, 0.2s Time] [2022-07-23 06:14:09,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2022-07-23 06:14:09,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 229. [2022-07-23 06:14:09,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 199 states have (on average 1.2412060301507537) internal successors, (247), 213 states have internal predecessors, (247), 6 states have call successors, (6), 6 states have call predecessors, (6), 10 states have return successors, (10), 9 states have call predecessors, (10), 6 states have call successors, (10) [2022-07-23 06:14:09,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 263 transitions. [2022-07-23 06:14:09,556 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 263 transitions. Word has length 43 [2022-07-23 06:14:09,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:14:09,556 INFO L495 AbstractCegarLoop]: Abstraction has 229 states and 263 transitions. [2022-07-23 06:14:09,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 20 states have internal predecessors, (65), 5 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-23 06:14:09,557 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 263 transitions. [2022-07-23 06:14:09,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-07-23 06:14:09,557 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:14:09,557 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-07-23 06:14:09,579 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (53)] Forceful destruction successful, exit code 0 [2022-07-23 06:14:09,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:14:09,766 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-23 06:14:09,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:14:09,766 INFO L85 PathProgramCache]: Analyzing trace with hash -1857063425, now seen corresponding path program 1 times [2022-07-23 06:14:09,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:14:09,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1151940224] [2022-07-23 06:14:09,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:14:09,767 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:14:09,767 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:14:09,768 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:14:09,769 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (54)] Waiting until timeout for monitored process [2022-07-23 06:14:09,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:14:09,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-23 06:14:09,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:14:09,914 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-23 06:14:10,136 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-23 06:14:10,154 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 06:14:10,154 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:14:10,368 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-07-23 06:14:10,370 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-07-23 06:14:10,451 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-23 06:14:10,451 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:14:10,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1151940224] [2022-07-23 06:14:10,451 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1151940224] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 06:14:10,451 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 06:14:10,451 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2022-07-23 06:14:10,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149772344] [2022-07-23 06:14:10,451 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 06:14:10,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-23 06:14:10,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:14:10,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-23 06:14:10,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2022-07-23 06:14:10,452 INFO L87 Difference]: Start difference. First operand 229 states and 263 transitions. Second operand has 16 states, 15 states have (on average 4.533333333333333) internal successors, (68), 16 states have internal predecessors, (68), 3 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-23 06:14:11,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:14:11,207 INFO L93 Difference]: Finished difference Result 263 states and 295 transitions. [2022-07-23 06:14:11,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-23 06:14:11,208 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 4.533333333333333) internal successors, (68), 16 states have internal predecessors, (68), 3 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 42 [2022-07-23 06:14:11,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:14:11,209 INFO L225 Difference]: With dead ends: 263 [2022-07-23 06:14:11,209 INFO L226 Difference]: Without dead ends: 263 [2022-07-23 06:14:11,209 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=105, Invalid=357, Unknown=0, NotChecked=0, Total=462 [2022-07-23 06:14:11,210 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 132 mSDsluCounter, 490 mSDsCounter, 0 mSdLazyCounter, 351 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 554 SdHoareTripleChecker+Invalid, 493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 128 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-23 06:14:11,210 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 554 Invalid, 493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 351 Invalid, 0 Unknown, 128 Unchecked, 0.6s Time] [2022-07-23 06:14:11,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2022-07-23 06:14:11,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 234. [2022-07-23 06:14:11,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 204 states have (on average 1.2401960784313726) internal successors, (253), 218 states have internal predecessors, (253), 6 states have call successors, (6), 6 states have call predecessors, (6), 10 states have return successors, (10), 9 states have call predecessors, (10), 6 states have call successors, (10) [2022-07-23 06:14:11,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 269 transitions. [2022-07-23 06:14:11,213 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 269 transitions. Word has length 42 [2022-07-23 06:14:11,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:14:11,213 INFO L495 AbstractCegarLoop]: Abstraction has 234 states and 269 transitions. [2022-07-23 06:14:11,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 4.533333333333333) internal successors, (68), 16 states have internal predecessors, (68), 3 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-23 06:14:11,213 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 269 transitions. [2022-07-23 06:14:11,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-07-23 06:14:11,214 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:14:11,214 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 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] [2022-07-23 06:14:11,222 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (54)] Forceful destruction successful, exit code 0 [2022-07-23 06:14:11,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:14:11,422 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-23 06:14:11,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:14:11,422 INFO L85 PathProgramCache]: Analyzing trace with hash -591810866, now seen corresponding path program 1 times [2022-07-23 06:14:11,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:14:11,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1580059422] [2022-07-23 06:14:11,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:14:11,423 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:14:11,423 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:14:11,440 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:14:11,442 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (55)] Waiting until timeout for monitored process [2022-07-23 06:14:11,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:14:11,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 33 conjunts are in the unsatisfiable core [2022-07-23 06:14:11,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:14:11,843 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-23 06:14:11,971 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 22 [2022-07-23 06:14:16,230 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-23 06:14:16,230 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:14:18,462 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 52 [2022-07-23 06:14:33,454 WARN L233 SmtUtils]: Spent 6.24s on a formula simplification that was a NOOP. DAG size: 45 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-23 06:14:33,455 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:14:33,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1580059422] [2022-07-23 06:14:33,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1580059422] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 06:14:33,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1306964191] [2022-07-23 06:14:33,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:14:33,455 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-23 06:14:33,455 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-23 06:14:33,456 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-23 06:14:33,458 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (56)] Waiting until timeout for monitored process [2022-07-23 06:14:33,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:14:33,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 40 conjunts are in the unsatisfiable core [2022-07-23 06:14:33,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:14:36,378 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-23 06:14:36,630 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 34 treesize of output 22 [2022-07-23 06:14:39,025 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-23 06:14:39,025 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:14:43,529 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 100 [2022-07-23 06:14:57,046 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1306964191] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 06:14:57,046 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 06:14:57,046 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2022-07-23 06:14:57,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903935794] [2022-07-23 06:14:57,046 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 06:14:57,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-07-23 06:14:57,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:14:57,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-07-23 06:14:57,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=1700, Unknown=14, NotChecked=0, Total=1892 [2022-07-23 06:14:57,047 INFO L87 Difference]: Start difference. First operand 234 states and 269 transitions. Second operand has 29 states, 28 states have (on average 2.5357142857142856) internal successors, (71), 25 states have internal predecessors, (71), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-23 06:14:57,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:14:57,077 INFO L93 Difference]: Finished difference Result 240 states and 274 transitions. [2022-07-23 06:14:57,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-23 06:14:57,077 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.5357142857142856) internal successors, (71), 25 states have internal predecessors, (71), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 43 [2022-07-23 06:14:57,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:14:57,078 INFO L225 Difference]: With dead ends: 240 [2022-07-23 06:14:57,078 INFO L226 Difference]: Without dead ends: 213 [2022-07-23 06:14:57,079 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 81 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 591 ImplicationChecksByTransitivity, 43.9s TimeCoverageRelationStatistics Valid=178, Invalid=1700, Unknown=14, NotChecked=0, Total=1892 [2022-07-23 06:14:57,079 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 34 mSDsluCounter, 589 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 640 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 268 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 06:14:57,079 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 640 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 268 Unchecked, 0.0s Time] [2022-07-23 06:14:57,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2022-07-23 06:14:57,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 213. [2022-07-23 06:14:57,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 185 states have (on average 1.2594594594594595) internal successors, (233), 199 states have internal predecessors, (233), 5 states have call successors, (5), 5 states have call predecessors, (5), 9 states have return successors, (9), 8 states have call predecessors, (9), 5 states have call successors, (9) [2022-07-23 06:14:57,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 247 transitions. [2022-07-23 06:14:57,082 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 247 transitions. Word has length 43 [2022-07-23 06:14:57,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:14:57,082 INFO L495 AbstractCegarLoop]: Abstraction has 213 states and 247 transitions. [2022-07-23 06:14:57,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.5357142857142856) internal successors, (71), 25 states have internal predecessors, (71), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-23 06:14:57,082 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 247 transitions. [2022-07-23 06:14:57,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-07-23 06:14:57,083 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:14:57,083 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:14:57,091 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (55)] Forceful destruction successful, exit code 0 [2022-07-23 06:14:57,287 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (56)] Forceful destruction successful, exit code 0 [2022-07-23 06:14:57,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2022-07-23 06:14:57,487 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-23 06:14:57,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:14:57,487 INFO L85 PathProgramCache]: Analyzing trace with hash 2022154436, now seen corresponding path program 1 times [2022-07-23 06:14:57,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:14:57,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1097719918] [2022-07-23 06:14:57,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:14:57,488 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:14:57,488 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:14:57,489 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:14:57,490 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (57)] Waiting until timeout for monitored process [2022-07-23 06:14:57,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:14:57,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-23 06:14:57,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:14:57,654 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-23 06:14:57,730 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-23 06:14:57,813 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2022-07-23 06:14:57,912 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2022-07-23 06:14:57,941 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-23 06:14:57,942 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:14:58,275 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-23 06:14:58,276 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:14:58,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1097719918] [2022-07-23 06:14:58,276 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1097719918] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 06:14:58,276 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 06:14:58,276 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 19 [2022-07-23 06:14:58,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164371970] [2022-07-23 06:14:58,276 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 06:14:58,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-23 06:14:58,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:14:58,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-23 06:14:58,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2022-07-23 06:14:58,277 INFO L87 Difference]: Start difference. First operand 213 states and 247 transitions. Second operand has 20 states, 19 states have (on average 3.0) internal successors, (57), 17 states have internal predecessors, (57), 4 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-07-23 06:14:59,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:14:59,385 INFO L93 Difference]: Finished difference Result 253 states and 287 transitions. [2022-07-23 06:14:59,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-23 06:14:59,386 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 3.0) internal successors, (57), 17 states have internal predecessors, (57), 4 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 44 [2022-07-23 06:14:59,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:14:59,387 INFO L225 Difference]: With dead ends: 253 [2022-07-23 06:14:59,387 INFO L226 Difference]: Without dead ends: 253 [2022-07-23 06:14:59,387 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=165, Invalid=1167, Unknown=0, NotChecked=0, Total=1332 [2022-07-23 06:14:59,388 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 191 mSDsluCounter, 654 mSDsCounter, 0 mSdLazyCounter, 579 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 723 SdHoareTripleChecker+Invalid, 666 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 579 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 66 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-23 06:14:59,388 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [191 Valid, 723 Invalid, 666 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 579 Invalid, 0 Unknown, 66 Unchecked, 0.6s Time] [2022-07-23 06:14:59,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2022-07-23 06:14:59,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 215. [2022-07-23 06:14:59,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 187 states have (on average 1.2566844919786095) internal successors, (235), 201 states have internal predecessors, (235), 5 states have call successors, (5), 5 states have call predecessors, (5), 9 states have return successors, (9), 8 states have call predecessors, (9), 5 states have call successors, (9) [2022-07-23 06:14:59,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 249 transitions. [2022-07-23 06:14:59,391 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 249 transitions. Word has length 44 [2022-07-23 06:14:59,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:14:59,391 INFO L495 AbstractCegarLoop]: Abstraction has 215 states and 249 transitions. [2022-07-23 06:14:59,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 3.0) internal successors, (57), 17 states have internal predecessors, (57), 4 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-07-23 06:14:59,391 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 249 transitions. [2022-07-23 06:14:59,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-07-23 06:14:59,391 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:14:59,392 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 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] [2022-07-23 06:14:59,408 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (57)] Forceful destruction successful, exit code 0 [2022-07-23 06:14:59,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:14:59,607 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-23 06:14:59,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:14:59,608 INFO L85 PathProgramCache]: Analyzing trace with hash 316873631, now seen corresponding path program 3 times [2022-07-23 06:14:59,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:14:59,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [165526167] [2022-07-23 06:14:59,608 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-23 06:14:59,608 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:14:59,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:14:59,609 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:14:59,610 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (58)] Waiting until timeout for monitored process [2022-07-23 06:14:59,738 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-07-23 06:14:59,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 06:14:59,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-23 06:14:59,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:14:59,773 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-23 06:14:59,835 INFO L356 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-07-23 06:14:59,835 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-07-23 06:14:59,876 INFO L356 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2022-07-23 06:14:59,876 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2022-07-23 06:14:59,990 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 15 treesize of output 7 [2022-07-23 06:15:00,018 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-23 06:15:00,037 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 06:15:00,037 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:15:02,092 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 36 [2022-07-23 06:15:10,157 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 29 [2022-07-23 06:15:10,160 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1468 treesize of output 1452 [2022-07-23 06:15:10,272 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-23 06:15:10,272 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:15:10,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [165526167] [2022-07-23 06:15:10,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [165526167] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 06:15:10,272 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 06:15:10,273 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2022-07-23 06:15:10,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16527233] [2022-07-23 06:15:10,273 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 06:15:10,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-23 06:15:10,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:15:10,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-23 06:15:10,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=414, Unknown=5, NotChecked=0, Total=506 [2022-07-23 06:15:10,274 INFO L87 Difference]: Start difference. First operand 215 states and 249 transitions. Second operand has 23 states, 22 states have (on average 3.090909090909091) internal successors, (68), 22 states have internal predecessors, (68), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-23 06:15:13,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:15:13,220 INFO L93 Difference]: Finished difference Result 377 states and 432 transitions. [2022-07-23 06:15:13,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-23 06:15:13,220 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 3.090909090909091) internal successors, (68), 22 states have internal predecessors, (68), 3 states have call successors, (3), 2 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 43 [2022-07-23 06:15:13,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:15:13,222 INFO L225 Difference]: With dead ends: 377 [2022-07-23 06:15:13,222 INFO L226 Difference]: Without dead ends: 377 [2022-07-23 06:15:13,222 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 12.6s TimeCoverageRelationStatistics Valid=178, Invalid=872, Unknown=6, NotChecked=0, Total=1056 [2022-07-23 06:15:13,222 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 222 mSDsluCounter, 680 mSDsCounter, 0 mSdLazyCounter, 364 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 734 SdHoareTripleChecker+Invalid, 610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 364 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 220 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-23 06:15:13,222 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [224 Valid, 734 Invalid, 610 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 364 Invalid, 0 Unknown, 220 Unchecked, 0.6s Time] [2022-07-23 06:15:13,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2022-07-23 06:15:13,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 241. [2022-07-23 06:15:13,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 209 states have (on average 1.2392344497607655) internal successors, (259), 225 states have internal predecessors, (259), 7 states have call successors, (7), 6 states have call predecessors, (7), 11 states have return successors, (13), 9 states have call predecessors, (13), 7 states have call successors, (13) [2022-07-23 06:15:13,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 279 transitions. [2022-07-23 06:15:13,226 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 279 transitions. Word has length 43 [2022-07-23 06:15:13,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:15:13,226 INFO L495 AbstractCegarLoop]: Abstraction has 241 states and 279 transitions. [2022-07-23 06:15:13,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 3.090909090909091) internal successors, (68), 22 states have internal predecessors, (68), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-23 06:15:13,226 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 279 transitions. [2022-07-23 06:15:13,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-23 06:15:13,227 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:15:13,227 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:15:13,236 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (58)] Forceful destruction successful, exit code 0 [2022-07-23 06:15:13,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:15:13,436 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-23 06:15:13,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:15:13,436 INFO L85 PathProgramCache]: Analyzing trace with hash -1737721805, now seen corresponding path program 1 times [2022-07-23 06:15:13,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:15:13,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1570045357] [2022-07-23 06:15:13,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:15:13,437 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:15:13,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:15:13,438 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:15:13,440 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (59)] Waiting until timeout for monitored process [2022-07-23 06:15:13,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:15:13,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 30 conjunts are in the unsatisfiable core [2022-07-23 06:15:13,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:15:13,577 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-23 06:15:13,691 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-23 06:15:13,692 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 18 treesize of output 25 [2022-07-23 06:15:13,754 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-23 06:15:13,835 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-07-23 06:15:17,967 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-07-23 06:15:17,998 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-07-23 06:15:18,014 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-23 06:15:18,014 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:15:18,576 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-23 06:15:18,576 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:15:18,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1570045357] [2022-07-23 06:15:18,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1570045357] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 06:15:18,576 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 06:15:18,576 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 26 [2022-07-23 06:15:18,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409603165] [2022-07-23 06:15:18,576 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 06:15:18,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-07-23 06:15:18,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:15:18,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-07-23 06:15:18,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=620, Unknown=1, NotChecked=0, Total=702 [2022-07-23 06:15:18,577 INFO L87 Difference]: Start difference. First operand 241 states and 279 transitions. Second operand has 27 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 23 states have internal predecessors, (62), 5 states have call successors, (5), 5 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-23 06:15:19,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:15:19,911 INFO L93 Difference]: Finished difference Result 288 states and 325 transitions. [2022-07-23 06:15:19,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-07-23 06:15:19,912 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 23 states have internal predecessors, (62), 5 states have call successors, (5), 5 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 45 [2022-07-23 06:15:19,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:15:19,913 INFO L225 Difference]: With dead ends: 288 [2022-07-23 06:15:19,913 INFO L226 Difference]: Without dead ends: 288 [2022-07-23 06:15:19,914 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 60 SyntacticMatches, 4 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=175, Invalid=1464, Unknown=1, NotChecked=0, Total=1640 [2022-07-23 06:15:19,914 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 128 mSDsluCounter, 941 mSDsCounter, 0 mSdLazyCounter, 756 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 1017 SdHoareTripleChecker+Invalid, 860 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 756 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 76 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-23 06:15:19,914 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 1017 Invalid, 860 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 756 Invalid, 0 Unknown, 76 Unchecked, 0.7s Time] [2022-07-23 06:15:19,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2022-07-23 06:15:19,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 243. [2022-07-23 06:15:19,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 211 states have (on average 1.2369668246445498) internal successors, (261), 227 states have internal predecessors, (261), 7 states have call successors, (7), 6 states have call predecessors, (7), 11 states have return successors, (13), 9 states have call predecessors, (13), 7 states have call successors, (13) [2022-07-23 06:15:19,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 281 transitions. [2022-07-23 06:15:19,918 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 281 transitions. Word has length 45 [2022-07-23 06:15:19,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:15:19,918 INFO L495 AbstractCegarLoop]: Abstraction has 243 states and 281 transitions. [2022-07-23 06:15:19,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 23 states have internal predecessors, (62), 5 states have call successors, (5), 5 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-23 06:15:19,918 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 281 transitions. [2022-07-23 06:15:19,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-07-23 06:15:19,918 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:15:19,919 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 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] [2022-07-23 06:15:19,937 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (59)] Forceful destruction successful, exit code 0 [2022-07-23 06:15:20,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:15:20,127 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-23 06:15:20,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:15:20,127 INFO L85 PathProgramCache]: Analyzing trace with hash 1233148047, now seen corresponding path program 2 times [2022-07-23 06:15:20,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:15:20,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1805270259] [2022-07-23 06:15:20,128 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-23 06:15:20,128 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:15:20,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:15:20,129 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:15:20,131 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (60)] Waiting until timeout for monitored process [2022-07-23 06:15:20,258 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-23 06:15:20,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 06:15:20,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-23 06:15:20,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:15:20,286 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-23 06:15:20,341 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-23 06:15:20,341 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-07-23 06:15:20,487 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-23 06:15:20,502 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 06:15:20,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:15:24,736 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 22 [2022-07-23 06:15:24,738 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 184 treesize of output 176 [2022-07-23 06:15:24,785 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-23 06:15:24,785 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:15:24,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1805270259] [2022-07-23 06:15:24,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1805270259] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 06:15:24,786 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 06:15:24,786 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2022-07-23 06:15:24,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617249019] [2022-07-23 06:15:24,786 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 06:15:24,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-23 06:15:24,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:15:24,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-23 06:15:24,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=219, Unknown=2, NotChecked=0, Total=272 [2022-07-23 06:15:24,787 INFO L87 Difference]: Start difference. First operand 243 states and 281 transitions. Second operand has 17 states, 16 states have (on average 3.6875) internal successors, (59), 17 states have internal predecessors, (59), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-23 06:15:25,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:15:25,011 INFO L93 Difference]: Finished difference Result 271 states and 309 transitions. [2022-07-23 06:15:25,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-23 06:15:25,012 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 3.6875) internal successors, (59), 17 states have internal predecessors, (59), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 44 [2022-07-23 06:15:25,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:15:25,013 INFO L225 Difference]: With dead ends: 271 [2022-07-23 06:15:25,013 INFO L226 Difference]: Without dead ends: 271 [2022-07-23 06:15:25,013 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=63, Invalid=277, Unknown=2, NotChecked=0, Total=342 [2022-07-23 06:15:25,014 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 73 mSDsluCounter, 422 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 482 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-23 06:15:25,014 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 482 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 150 Invalid, 0 Unknown, 43 Unchecked, 0.2s Time] [2022-07-23 06:15:25,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2022-07-23 06:15:25,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 234. [2022-07-23 06:15:25,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 205 states have (on average 1.2390243902439024) internal successors, (254), 219 states have internal predecessors, (254), 6 states have call successors, (6), 5 states have call predecessors, (6), 9 states have return successors, (11), 9 states have call predecessors, (11), 6 states have call successors, (11) [2022-07-23 06:15:25,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 271 transitions. [2022-07-23 06:15:25,017 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 271 transitions. Word has length 44 [2022-07-23 06:15:25,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:15:25,018 INFO L495 AbstractCegarLoop]: Abstraction has 234 states and 271 transitions. [2022-07-23 06:15:25,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 3.6875) internal successors, (59), 17 states have internal predecessors, (59), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-23 06:15:25,018 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 271 transitions. [2022-07-23 06:15:25,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-07-23 06:15:25,018 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:15:25,019 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:15:25,041 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (60)] Forceful destruction successful, exit code 0 [2022-07-23 06:15:25,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:15:25,226 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-23 06:15:25,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:15:25,227 INFO L85 PathProgramCache]: Analyzing trace with hash -1988382823, now seen corresponding path program 2 times [2022-07-23 06:15:25,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:15:25,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [736112672] [2022-07-23 06:15:25,227 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-23 06:15:25,227 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:15:25,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:15:25,229 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:15:25,230 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (61)] Waiting until timeout for monitored process [2022-07-23 06:15:25,404 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-23 06:15:25,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 06:15:25,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-23 06:15:25,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:15:25,493 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-23 06:15:25,632 INFO L356 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-07-23 06:15:25,632 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-07-23 06:15:25,688 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-23 06:15:25,701 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-23 06:15:25,702 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:15:36,134 WARN L833 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_alloc_17_~i~0#1| (_ BitVec 32))) (= (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_alloc_17_~array#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_alloc_17_~array#1.base|) (bvadd (bvmul (_ bv4 32) |ULTIMATE.start_alloc_17_~i~0#1|) |c_ULTIMATE.start_alloc_17_~array#1.offset|) |c_ULTIMATE.start_alloc_17_#t~ret39#1.offset|)) |c_ULTIMATE.start_entry_point_~array~0#1.base|) |c_ULTIMATE.start_entry_point_~array~0#1.offset|) (_ bv0 32))) is different from false [2022-07-23 06:15:38,271 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2022-07-23 06:15:38,417 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 13 trivial. 1 not checked. [2022-07-23 06:15:38,418 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:15:38,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [736112672] [2022-07-23 06:15:38,418 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [736112672] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 06:15:38,418 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 06:15:38,418 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 20 [2022-07-23 06:15:38,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571759240] [2022-07-23 06:15:38,418 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 06:15:38,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-23 06:15:38,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:15:38,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-23 06:15:38,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=312, Unknown=5, NotChecked=36, Total=420 [2022-07-23 06:15:38,419 INFO L87 Difference]: Start difference. First operand 234 states and 271 transitions. Second operand has 21 states, 20 states have (on average 2.5) internal successors, (50), 17 states have internal predecessors, (50), 5 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-07-23 06:15:39,629 WARN L833 $PredicateComparison]: unable to prove that (and (= |c_ULTIMATE.start_alloc_17_~array#1.offset| |c_ULTIMATE.start_entry_point_~array~0#1.offset|) (= (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_alloc_17_~array#1.base|) |c_ULTIMATE.start_alloc_17_~array#1.offset|) (_ bv0 32)) (forall ((|ULTIMATE.start_alloc_17_~i~0#1| (_ BitVec 32))) (= (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_alloc_17_~array#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_alloc_17_~array#1.base|) (bvadd (bvmul (_ bv4 32) |ULTIMATE.start_alloc_17_~i~0#1|) |c_ULTIMATE.start_alloc_17_~array#1.offset|) |c_ULTIMATE.start_alloc_17_#t~ret39#1.offset|)) |c_ULTIMATE.start_entry_point_~array~0#1.base|) |c_ULTIMATE.start_entry_point_~array~0#1.offset|) (_ bv0 32))) (= |c_ULTIMATE.start_alloc_17_#t~ret39#1.offset| (_ bv0 32)) (= |c_ULTIMATE.start_entry_point_~array~0#1.base| |c_ULTIMATE.start_alloc_17_~array#1.base|)) is different from false [2022-07-23 06:15:39,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:15:39,926 INFO L93 Difference]: Finished difference Result 282 states and 319 transitions. [2022-07-23 06:15:39,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-23 06:15:39,927 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.5) internal successors, (50), 17 states have internal predecessors, (50), 5 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 46 [2022-07-23 06:15:39,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:15:39,927 INFO L225 Difference]: With dead ends: 282 [2022-07-23 06:15:39,927 INFO L226 Difference]: Without dead ends: 282 [2022-07-23 06:15:39,928 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 13.9s TimeCoverageRelationStatistics Valid=116, Invalid=486, Unknown=6, NotChecked=94, Total=702 [2022-07-23 06:15:39,928 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 169 mSDsluCounter, 643 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 714 SdHoareTripleChecker+Invalid, 402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 136 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-23 06:15:39,928 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [171 Valid, 714 Invalid, 402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 254 Invalid, 0 Unknown, 136 Unchecked, 0.3s Time] [2022-07-23 06:15:39,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2022-07-23 06:15:39,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 234. [2022-07-23 06:15:39,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 205 states have (on average 1.2439024390243902) internal successors, (255), 219 states have internal predecessors, (255), 6 states have call successors, (6), 5 states have call predecessors, (6), 9 states have return successors, (11), 9 states have call predecessors, (11), 6 states have call successors, (11) [2022-07-23 06:15:39,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 272 transitions. [2022-07-23 06:15:39,931 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 272 transitions. Word has length 46 [2022-07-23 06:15:39,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:15:39,932 INFO L495 AbstractCegarLoop]: Abstraction has 234 states and 272 transitions. [2022-07-23 06:15:39,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.5) internal successors, (50), 17 states have internal predecessors, (50), 5 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-07-23 06:15:39,932 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 272 transitions. [2022-07-23 06:15:39,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-23 06:15:39,932 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:15:39,932 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 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] [2022-07-23 06:15:39,942 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (61)] Forceful destruction successful, exit code 0 [2022-07-23 06:15:40,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:15:40,140 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-23 06:15:40,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:15:40,140 INFO L85 PathProgramCache]: Analyzing trace with hash -1665358864, now seen corresponding path program 2 times [2022-07-23 06:15:40,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:15:40,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2115523615] [2022-07-23 06:15:40,140 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-23 06:15:40,140 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:15:40,141 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:15:40,142 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:15:40,143 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (62)] Waiting until timeout for monitored process [2022-07-23 06:15:40,250 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-23 06:15:40,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 06:15:40,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 21 conjunts are in the unsatisfiable core [2022-07-23 06:15:40,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:15:40,294 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-23 06:15:40,433 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2022-07-23 06:15:40,802 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 06:15:40,803 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:15:41,548 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 06:15:41,549 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:15:41,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2115523615] [2022-07-23 06:15:41,549 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2115523615] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 06:15:41,549 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 06:15:41,549 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 31 [2022-07-23 06:15:41,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604158755] [2022-07-23 06:15:41,549 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 06:15:41,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-07-23 06:15:41,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:15:41,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-07-23 06:15:41,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=809, Unknown=0, NotChecked=0, Total=930 [2022-07-23 06:15:41,550 INFO L87 Difference]: Start difference. First operand 234 states and 272 transitions. Second operand has 31 states, 30 states have (on average 2.433333333333333) internal successors, (73), 29 states have internal predecessors, (73), 4 states have call successors, (4), 1 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-23 06:15:43,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:15:43,943 INFO L93 Difference]: Finished difference Result 384 states and 441 transitions. [2022-07-23 06:15:43,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-07-23 06:15:43,944 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.433333333333333) internal successors, (73), 29 states have internal predecessors, (73), 4 states have call successors, (4), 1 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 45 [2022-07-23 06:15:43,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:15:43,945 INFO L225 Difference]: With dead ends: 384 [2022-07-23 06:15:43,945 INFO L226 Difference]: Without dead ends: 376 [2022-07-23 06:15:43,946 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 514 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=554, Invalid=2526, Unknown=0, NotChecked=0, Total=3080 [2022-07-23 06:15:43,946 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 862 mSDsluCounter, 574 mSDsCounter, 0 mSdLazyCounter, 457 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 862 SdHoareTripleChecker+Valid, 626 SdHoareTripleChecker+Invalid, 732 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 457 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 127 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-23 06:15:43,946 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [862 Valid, 626 Invalid, 732 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 457 Invalid, 0 Unknown, 127 Unchecked, 0.8s Time] [2022-07-23 06:15:43,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2022-07-23 06:15:43,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 236. [2022-07-23 06:15:43,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 207 states have (on average 1.251207729468599) internal successors, (259), 221 states have internal predecessors, (259), 6 states have call successors, (6), 5 states have call predecessors, (6), 9 states have return successors, (11), 9 states have call predecessors, (11), 6 states have call successors, (11) [2022-07-23 06:15:43,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 276 transitions. [2022-07-23 06:15:43,953 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 276 transitions. Word has length 45 [2022-07-23 06:15:43,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:15:43,953 INFO L495 AbstractCegarLoop]: Abstraction has 236 states and 276 transitions. [2022-07-23 06:15:43,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.433333333333333) internal successors, (73), 29 states have internal predecessors, (73), 4 states have call successors, (4), 1 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-23 06:15:43,953 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 276 transitions. [2022-07-23 06:15:43,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-07-23 06:15:43,954 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:15:43,954 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:15:43,975 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (62)] Forceful destruction successful, exit code 0 [2022-07-23 06:15:44,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:15:44,155 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-23 06:15:44,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:15:44,155 INFO L85 PathProgramCache]: Analyzing trace with hash -1510325227, now seen corresponding path program 2 times [2022-07-23 06:15:44,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:15:44,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1777857476] [2022-07-23 06:15:44,156 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-23 06:15:44,156 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:15:44,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:15:44,157 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:15:44,158 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (63)] Waiting until timeout for monitored process [2022-07-23 06:15:44,309 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-23 06:15:44,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 06:15:44,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 21 conjunts are in the unsatisfiable core [2022-07-23 06:15:44,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:15:44,405 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-23 06:15:44,578 INFO L356 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2022-07-23 06:15:44,578 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2022-07-23 06:15:44,631 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-23 06:15:44,652 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-23 06:15:44,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:15:45,097 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:15:45,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1777857476] [2022-07-23 06:15:45,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1777857476] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 06:15:45,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1233091400] [2022-07-23 06:15:45,097 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-23 06:15:45,097 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-23 06:15:45,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-23 06:15:45,098 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-23 06:15:45,099 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (64)] Waiting until timeout for monitored process [2022-07-23 06:15:45,315 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-23 06:15:45,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 06:15:45,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 26 conjunts are in the unsatisfiable core [2022-07-23 06:15:45,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:15:45,604 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-23 06:15:45,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 06:15:45,886 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-07-23 06:15:46,003 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-23 06:15:46,008 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-23 06:15:46,008 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:15:46,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1233091400] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 06:15:46,344 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 06:15:46,344 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 23 [2022-07-23 06:15:46,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006445569] [2022-07-23 06:15:46,344 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 06:15:46,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-23 06:15:46,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:15:46,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-23 06:15:46,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2022-07-23 06:15:46,345 INFO L87 Difference]: Start difference. First operand 236 states and 276 transitions. Second operand has 24 states, 23 states have (on average 2.9130434782608696) internal successors, (67), 21 states have internal predecessors, (67), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-23 06:15:47,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:15:47,716 INFO L93 Difference]: Finished difference Result 351 states and 391 transitions. [2022-07-23 06:15:47,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-23 06:15:47,717 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.9130434782608696) internal successors, (67), 21 states have internal predecessors, (67), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 47 [2022-07-23 06:15:47,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:15:47,718 INFO L225 Difference]: With dead ends: 351 [2022-07-23 06:15:47,718 INFO L226 Difference]: Without dead ends: 351 [2022-07-23 06:15:47,718 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 90 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=219, Invalid=1187, Unknown=0, NotChecked=0, Total=1406 [2022-07-23 06:15:47,718 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 309 mSDsluCounter, 712 mSDsCounter, 0 mSdLazyCounter, 826 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 315 SdHoareTripleChecker+Valid, 779 SdHoareTripleChecker+Invalid, 912 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 826 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 48 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-23 06:15:47,718 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [315 Valid, 779 Invalid, 912 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 826 Invalid, 0 Unknown, 48 Unchecked, 1.0s Time] [2022-07-23 06:15:47,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2022-07-23 06:15:47,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 264. [2022-07-23 06:15:47,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 234 states have (on average 1.2692307692307692) internal successors, (297), 248 states have internal predecessors, (297), 7 states have call successors, (7), 5 states have call predecessors, (7), 9 states have return successors, (13), 10 states have call predecessors, (13), 7 states have call successors, (13) [2022-07-23 06:15:47,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 317 transitions. [2022-07-23 06:15:47,722 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 317 transitions. Word has length 47 [2022-07-23 06:15:47,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:15:47,722 INFO L495 AbstractCegarLoop]: Abstraction has 264 states and 317 transitions. [2022-07-23 06:15:47,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.9130434782608696) internal successors, (67), 21 states have internal predecessors, (67), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-23 06:15:47,723 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 317 transitions. [2022-07-23 06:15:47,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-07-23 06:15:47,723 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:15:47,723 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:15:47,744 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (64)] Ended with exit code 0 [2022-07-23 06:15:47,936 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (63)] Ended with exit code 0 [2022-07-23 06:15:48,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:15:48,137 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-23 06:15:48,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:15:48,138 INFO L85 PathProgramCache]: Analyzing trace with hash -791017244, now seen corresponding path program 4 times [2022-07-23 06:15:48,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:15:48,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [933285570] [2022-07-23 06:15:48,138 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-23 06:15:48,139 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:15:48,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:15:48,140 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:15:48,141 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (65)] Waiting until timeout for monitored process [2022-07-23 06:15:48,261 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-23 06:15:48,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 06:15:48,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-23 06:15:48,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:15:48,310 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-23 06:15:48,505 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-07-23 06:15:48,785 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 06:15:48,785 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:15:49,212 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-23 06:15:49,212 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:15:49,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [933285570] [2022-07-23 06:15:49,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [933285570] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 06:15:49,213 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 06:15:49,213 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 10] total 25 [2022-07-23 06:15:49,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478520404] [2022-07-23 06:15:49,213 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 06:15:49,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-23 06:15:49,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:15:49,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-23 06:15:49,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2022-07-23 06:15:49,214 INFO L87 Difference]: Start difference. First operand 264 states and 317 transitions. Second operand has 25 states, 24 states have (on average 3.1666666666666665) internal successors, (76), 24 states have internal predecessors, (76), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-23 06:15:50,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:15:50,888 INFO L93 Difference]: Finished difference Result 414 states and 497 transitions. [2022-07-23 06:15:50,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-23 06:15:50,889 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 3.1666666666666665) internal successors, (76), 24 states have internal predecessors, (76), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 46 [2022-07-23 06:15:50,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:15:50,891 INFO L225 Difference]: With dead ends: 414 [2022-07-23 06:15:50,891 INFO L226 Difference]: Without dead ends: 414 [2022-07-23 06:15:50,891 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=300, Invalid=1422, Unknown=0, NotChecked=0, Total=1722 [2022-07-23 06:15:50,891 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 527 mSDsluCounter, 671 mSDsCounter, 0 mSdLazyCounter, 477 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 527 SdHoareTripleChecker+Valid, 726 SdHoareTripleChecker+Invalid, 555 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-23 06:15:50,891 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [527 Valid, 726 Invalid, 555 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 477 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-23 06:15:50,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2022-07-23 06:15:50,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 390. [2022-07-23 06:15:50,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 356 states have (on average 1.2865168539325842) internal successors, (458), 367 states have internal predecessors, (458), 11 states have call successors, (11), 5 states have call predecessors, (11), 9 states have return successors, (21), 17 states have call predecessors, (21), 11 states have call successors, (21) [2022-07-23 06:15:50,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 490 transitions. [2022-07-23 06:15:50,896 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 490 transitions. Word has length 46 [2022-07-23 06:15:50,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:15:50,897 INFO L495 AbstractCegarLoop]: Abstraction has 390 states and 490 transitions. [2022-07-23 06:15:50,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 3.1666666666666665) internal successors, (76), 24 states have internal predecessors, (76), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-23 06:15:50,897 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 490 transitions. [2022-07-23 06:15:50,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-23 06:15:50,897 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:15:50,897 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:15:50,908 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (65)] Ended with exit code 0 [2022-07-23 06:15:51,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:15:51,112 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-23 06:15:51,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:15:51,112 INFO L85 PathProgramCache]: Analyzing trace with hash 424558363, now seen corresponding path program 2 times [2022-07-23 06:15:51,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:15:51,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1567121139] [2022-07-23 06:15:51,113 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-23 06:15:51,113 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:15:51,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:15:51,114 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:15:51,116 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (66)] Waiting until timeout for monitored process [2022-07-23 06:15:51,320 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-23 06:15:51,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 06:15:51,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 26 conjunts are in the unsatisfiable core [2022-07-23 06:15:51,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:15:51,352 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-23 06:15:51,406 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-23 06:15:51,458 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2022-07-23 06:15:51,521 INFO L356 Elim1Store]: treesize reduction 39, result has 30.4 percent of original size [2022-07-23 06:15:51,521 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 26 [2022-07-23 06:15:51,567 INFO L356 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2022-07-23 06:15:51,567 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-07-23 06:15:51,614 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2022-07-23 06:15:51,633 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-23 06:15:51,633 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:15:57,995 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:15:57,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1567121139] [2022-07-23 06:15:57,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1567121139] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 06:15:57,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1187769333] [2022-07-23 06:15:57,995 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-23 06:15:57,996 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-23 06:15:57,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-23 06:15:57,997 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-23 06:15:57,998 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (67)] Waiting until timeout for monitored process [2022-07-23 06:15:58,210 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-23 06:15:58,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 06:15:58,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-23 06:15:58,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:15:58,432 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-23 06:15:58,596 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-23 06:15:58,747 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2022-07-23 06:15:58,772 INFO L356 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2022-07-23 06:15:58,772 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 21 [2022-07-23 06:15:58,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 06:15:58,866 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-07-23 06:15:58,994 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2022-07-23 06:15:58,999 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-23 06:15:59,000 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:16:03,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1187769333] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 06:16:03,302 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 06:16:03,302 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 23 [2022-07-23 06:16:03,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504913437] [2022-07-23 06:16:03,302 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 06:16:03,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-23 06:16:03,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:16:03,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-23 06:16:03,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=612, Unknown=3, NotChecked=0, Total=702 [2022-07-23 06:16:03,303 INFO L87 Difference]: Start difference. First operand 390 states and 490 transitions. Second operand has 24 states, 23 states have (on average 2.8260869565217392) internal successors, (65), 21 states have internal predecessors, (65), 5 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-23 06:16:04,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:16:04,552 INFO L93 Difference]: Finished difference Result 458 states and 560 transitions. [2022-07-23 06:16:04,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-23 06:16:04,552 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.8260869565217392) internal successors, (65), 21 states have internal predecessors, (65), 5 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 48 [2022-07-23 06:16:04,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:16:04,554 INFO L225 Difference]: With dead ends: 458 [2022-07-23 06:16:04,554 INFO L226 Difference]: Without dead ends: 458 [2022-07-23 06:16:04,554 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 92 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=125, Invalid=864, Unknown=3, NotChecked=0, Total=992 [2022-07-23 06:16:04,554 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 170 mSDsluCounter, 742 mSDsCounter, 0 mSdLazyCounter, 737 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 803 SdHoareTripleChecker+Invalid, 844 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 737 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 85 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-23 06:16:04,554 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [171 Valid, 803 Invalid, 844 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 737 Invalid, 0 Unknown, 85 Unchecked, 1.0s Time] [2022-07-23 06:16:04,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2022-07-23 06:16:04,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 404. [2022-07-23 06:16:04,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 370 states have (on average 1.281081081081081) internal successors, (474), 381 states have internal predecessors, (474), 11 states have call successors, (11), 5 states have call predecessors, (11), 9 states have return successors, (21), 17 states have call predecessors, (21), 11 states have call successors, (21) [2022-07-23 06:16:04,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 506 transitions. [2022-07-23 06:16:04,559 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 506 transitions. Word has length 48 [2022-07-23 06:16:04,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:16:04,559 INFO L495 AbstractCegarLoop]: Abstraction has 404 states and 506 transitions. [2022-07-23 06:16:04,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.8260869565217392) internal successors, (65), 21 states have internal predecessors, (65), 5 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-23 06:16:04,559 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 506 transitions. [2022-07-23 06:16:04,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-07-23 06:16:04,560 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:16:04,560 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:16:04,570 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (66)] Forceful destruction successful, exit code 0 [2022-07-23 06:16:04,770 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (67)] Ended with exit code 0 [2022-07-23 06:16:04,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2022-07-23 06:16:04,968 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-23 06:16:04,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:16:04,969 INFO L85 PathProgramCache]: Analyzing trace with hash -507079458, now seen corresponding path program 4 times [2022-07-23 06:16:04,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:16:04,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1296622337] [2022-07-23 06:16:04,969 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-23 06:16:04,969 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:16:04,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:16:04,971 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:16:05,000 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (68)] Waiting until timeout for monitored process [2022-07-23 06:16:05,106 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-23 06:16:05,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 06:16:05,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-23 06:16:05,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:16:05,205 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-23 06:16:05,504 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-07-23 06:16:05,955 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 20 proven. 19 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-23 06:16:05,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:16:06,706 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-23 06:16:06,706 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:16:06,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1296622337] [2022-07-23 06:16:06,706 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1296622337] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 06:16:06,706 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 06:16:06,706 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 10] total 25 [2022-07-23 06:16:06,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328633838] [2022-07-23 06:16:06,706 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 06:16:06,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-23 06:16:06,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:16:06,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-23 06:16:06,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2022-07-23 06:16:06,707 INFO L87 Difference]: Start difference. First operand 404 states and 506 transitions. Second operand has 25 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 24 states have internal predecessors, (62), 7 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2022-07-23 06:16:09,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:16:09,156 INFO L93 Difference]: Finished difference Result 414 states and 473 transitions. [2022-07-23 06:16:09,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-23 06:16:09,157 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 24 states have internal predecessors, (62), 7 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 49 [2022-07-23 06:16:09,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:16:09,158 INFO L225 Difference]: With dead ends: 414 [2022-07-23 06:16:09,159 INFO L226 Difference]: Without dead ends: 414 [2022-07-23 06:16:09,159 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=305, Invalid=1417, Unknown=0, NotChecked=0, Total=1722 [2022-07-23 06:16:09,160 INFO L413 NwaCegarLoop]: 87 mSDtfsCounter, 720 mSDsluCounter, 1063 mSDsCounter, 0 mSdLazyCounter, 556 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 720 SdHoareTripleChecker+Valid, 1150 SdHoareTripleChecker+Invalid, 618 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-07-23 06:16:09,175 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [720 Valid, 1150 Invalid, 618 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 556 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-07-23 06:16:09,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2022-07-23 06:16:09,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 340. [2022-07-23 06:16:09,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 308 states have (on average 1.2467532467532467) internal successors, (384), 320 states have internal predecessors, (384), 9 states have call successors, (9), 5 states have call predecessors, (9), 9 states have return successors, (17), 14 states have call predecessors, (17), 9 states have call successors, (17) [2022-07-23 06:16:09,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 410 transitions. [2022-07-23 06:16:09,193 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 410 transitions. Word has length 49 [2022-07-23 06:16:09,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:16:09,193 INFO L495 AbstractCegarLoop]: Abstraction has 340 states and 410 transitions. [2022-07-23 06:16:09,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 24 states have internal predecessors, (62), 7 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2022-07-23 06:16:09,194 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 410 transitions. [2022-07-23 06:16:09,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-23 06:16:09,194 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:16:09,194 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:16:09,204 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (68)] Forceful destruction successful, exit code 0 [2022-07-23 06:16:09,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:16:09,395 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-23 06:16:09,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:16:09,395 INFO L85 PathProgramCache]: Analyzing trace with hash -1229413940, now seen corresponding path program 1 times [2022-07-23 06:16:09,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:16:09,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1457069126] [2022-07-23 06:16:09,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:16:09,396 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:16:09,396 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:16:09,397 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:16:09,398 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (69)] Waiting until timeout for monitored process [2022-07-23 06:16:09,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:16:09,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-23 06:16:09,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:16:09,551 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-07-23 06:16:09,551 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:16:09,654 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-07-23 06:16:09,654 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:16:09,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1457069126] [2022-07-23 06:16:09,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1457069126] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 06:16:09,654 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 06:16:09,654 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-07-23 06:16:09,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124713666] [2022-07-23 06:16:09,654 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 06:16:09,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-23 06:16:09,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:16:09,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-23 06:16:09,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-07-23 06:16:09,655 INFO L87 Difference]: Start difference. First operand 340 states and 410 transitions. Second operand has 10 states, 10 states have (on average 5.2) internal successors, (52), 10 states have internal predecessors, (52), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-07-23 06:16:09,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:16:09,811 INFO L93 Difference]: Finished difference Result 407 states and 473 transitions. [2022-07-23 06:16:09,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-23 06:16:09,812 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 10 states have internal predecessors, (52), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 48 [2022-07-23 06:16:09,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:16:09,813 INFO L225 Difference]: With dead ends: 407 [2022-07-23 06:16:09,813 INFO L226 Difference]: Without dead ends: 407 [2022-07-23 06:16:09,814 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2022-07-23 06:16:09,814 INFO L413 NwaCegarLoop]: 88 mSDtfsCounter, 210 mSDsluCounter, 476 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 564 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 06:16:09,814 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [210 Valid, 564 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 06:16:09,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2022-07-23 06:16:09,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 330. [2022-07-23 06:16:09,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 298 states have (on average 1.2147651006711409) internal successors, (362), 310 states have internal predecessors, (362), 9 states have call successors, (9), 5 states have call predecessors, (9), 9 states have return successors, (17), 14 states have call predecessors, (17), 9 states have call successors, (17) [2022-07-23 06:16:09,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 388 transitions. [2022-07-23 06:16:09,818 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 388 transitions. Word has length 48 [2022-07-23 06:16:09,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:16:09,818 INFO L495 AbstractCegarLoop]: Abstraction has 330 states and 388 transitions. [2022-07-23 06:16:09,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 10 states have internal predecessors, (52), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-07-23 06:16:09,818 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 388 transitions. [2022-07-23 06:16:09,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-07-23 06:16:09,819 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:16:09,819 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 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] [2022-07-23 06:16:09,826 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (69)] Forceful destruction successful, exit code 0 [2022-07-23 06:16:10,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:16:10,026 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-23 06:16:10,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:16:10,026 INFO L85 PathProgramCache]: Analyzing trace with hash 1023026287, now seen corresponding path program 3 times [2022-07-23 06:16:10,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:16:10,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1567212244] [2022-07-23 06:16:10,026 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-23 06:16:10,027 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:16:10,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:16:10,028 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:16:10,029 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (70)] Waiting until timeout for monitored process [2022-07-23 06:16:10,185 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-07-23 06:16:10,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 06:16:10,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-23 06:16:10,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:16:10,210 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-23 06:16:10,279 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-23 06:16:10,280 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-23 06:16:10,346 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-23 06:16:10,346 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-07-23 06:16:10,540 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-23 06:16:10,558 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 4 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 06:16:10,558 INFO L328 TraceCheckSpWp]: Computing backward predicates...