./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/ldv-memsafety/memleaks_test15-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version eb692b52 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/ldv-memsafety/memleaks_test15-1.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 e94333448b9ec2a5ffed0adee00d968fb025c54e55196475ef51117fcee9fc3a --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-20 05:56:28,234 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-20 05:56:28,236 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-20 05:56:28,273 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-20 05:56:28,274 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-20 05:56:28,275 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-20 05:56:28,280 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-20 05:56:28,285 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-20 05:56:28,286 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-20 05:56:28,292 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-20 05:56:28,293 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-20 05:56:28,295 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-20 05:56:28,296 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-20 05:56:28,297 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-20 05:56:28,298 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-20 05:56:28,300 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-20 05:56:28,301 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-20 05:56:28,302 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-20 05:56:28,306 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-20 05:56:28,307 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-20 05:56:28,311 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-20 05:56:28,312 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-20 05:56:28,313 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-20 05:56:28,314 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-20 05:56:28,315 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-20 05:56:28,318 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-20 05:56:28,319 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-20 05:56:28,319 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-20 05:56:28,321 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-20 05:56:28,321 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-20 05:56:28,322 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-20 05:56:28,322 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-20 05:56:28,324 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-20 05:56:28,325 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-20 05:56:28,325 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-20 05:56:28,326 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-20 05:56:28,326 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-20 05:56:28,327 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-20 05:56:28,327 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-20 05:56:28,327 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-20 05:56:28,328 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-20 05:56:28,329 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-20 05:56:28,331 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-07-20 05:56:28,363 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-20 05:56:28,364 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-20 05:56:28,364 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-20 05:56:28,364 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-20 05:56:28,365 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-20 05:56:28,365 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-20 05:56:28,366 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-20 05:56:28,366 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-20 05:56:28,366 INFO L138 SettingsManager]: * Use SBE=true [2022-07-20 05:56:28,367 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-20 05:56:28,367 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-20 05:56:28,367 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-20 05:56:28,367 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-20 05:56:28,367 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-20 05:56:28,368 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-20 05:56:28,368 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-20 05:56:28,368 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-20 05:56:28,368 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-20 05:56:28,368 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-20 05:56:28,369 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-20 05:56:28,370 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-20 05:56:28,370 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-20 05:56:28,370 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-20 05:56:28,370 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-20 05:56:28,370 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-20 05:56:28,370 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-20 05:56:28,371 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-20 05:56:28,371 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-20 05:56:28,371 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-20 05:56:28,371 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-20 05:56:28,371 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e94333448b9ec2a5ffed0adee00d968fb025c54e55196475ef51117fcee9fc3a [2022-07-20 05:56:28,609 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-20 05:56:28,634 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-20 05:56:28,636 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-20 05:56:28,637 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-20 05:56:28,638 INFO L275 PluginConnector]: CDTParser initialized [2022-07-20 05:56:28,639 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-memsafety/memleaks_test15-1.i [2022-07-20 05:56:28,720 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/48a7e36a6/774c0c95df6b46dcba40c7e343fea23b/FLAG7511b320b [2022-07-20 05:56:29,157 INFO L306 CDTParser]: Found 1 translation units. [2022-07-20 05:56:29,158 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-memsafety/memleaks_test15-1.i [2022-07-20 05:56:29,171 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/48a7e36a6/774c0c95df6b46dcba40c7e343fea23b/FLAG7511b320b [2022-07-20 05:56:29,191 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/48a7e36a6/774c0c95df6b46dcba40c7e343fea23b [2022-07-20 05:56:29,193 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-20 05:56:29,195 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-20 05:56:29,197 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-20 05:56:29,197 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-20 05:56:29,200 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-20 05:56:29,201 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 05:56:29" (1/1) ... [2022-07-20 05:56:29,202 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2782db5b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:56:29, skipping insertion in model container [2022-07-20 05:56:29,202 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 05:56:29" (1/1) ... [2022-07-20 05:56:29,207 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-20 05:56:29,263 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-20 05:56:29,568 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 05:56:29,599 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2022-07-20 05:56:29,600 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@3f7a0afa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:56:29, skipping insertion in model container [2022-07-20 05:56:29,600 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-20 05:56:29,601 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-07-20 05:56:29,603 INFO L158 Benchmark]: Toolchain (without parser) took 406.92ms. Allocated memory is still 100.7MB. Free memory was 64.1MB in the beginning and 79.4MB in the end (delta: -15.3MB). Peak memory consumption was 18.7MB. Max. memory is 16.1GB. [2022-07-20 05:56:29,604 INFO L158 Benchmark]: CDTParser took 0.23ms. Allocated memory is still 79.7MB. Free memory is still 45.9MB. There was no memory consumed. Max. memory is 16.1GB. [2022-07-20 05:56:29,605 INFO L158 Benchmark]: CACSL2BoogieTranslator took 403.70ms. Allocated memory is still 100.7MB. Free memory was 63.9MB in the beginning and 79.4MB in the end (delta: -15.5MB). Peak memory consumption was 18.7MB. Max. memory is 16.1GB. [2022-07-20 05:56:29,607 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23ms. Allocated memory is still 79.7MB. Free memory is still 45.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 403.70ms. Allocated memory is still 100.7MB. Free memory was 63.9MB in the beginning and 79.4MB in the end (delta: -15.5MB). Peak memory consumption was 18.7MB. 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_test15-1.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 e94333448b9ec2a5ffed0adee00d968fb025c54e55196475ef51117fcee9fc3a --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-20 05:56:31,364 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-20 05:56:31,367 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-20 05:56:31,411 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-20 05:56:31,411 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-20 05:56:31,412 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-20 05:56:31,416 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-20 05:56:31,418 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-20 05:56:31,420 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-20 05:56:31,424 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-20 05:56:31,425 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-20 05:56:31,430 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-20 05:56:31,430 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-20 05:56:31,432 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-20 05:56:31,433 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-20 05:56:31,436 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-20 05:56:31,436 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-20 05:56:31,438 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-20 05:56:31,439 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-20 05:56:31,444 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-20 05:56:31,446 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-20 05:56:31,446 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-20 05:56:31,448 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-20 05:56:31,449 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-20 05:56:31,450 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-20 05:56:31,457 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-20 05:56:31,457 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-20 05:56:31,457 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-20 05:56:31,458 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-20 05:56:31,458 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-20 05:56:31,459 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-20 05:56:31,459 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-20 05:56:31,461 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-20 05:56:31,462 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-20 05:56:31,463 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-20 05:56:31,464 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-20 05:56:31,464 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-20 05:56:31,464 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-20 05:56:31,465 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-20 05:56:31,465 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-20 05:56:31,466 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-20 05:56:31,468 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-20 05:56:31,473 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2022-07-20 05:56:31,503 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-20 05:56:31,503 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-20 05:56:31,504 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-20 05:56:31,504 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-20 05:56:31,504 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-20 05:56:31,505 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-20 05:56:31,505 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-20 05:56:31,505 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-20 05:56:31,506 INFO L138 SettingsManager]: * Use SBE=true [2022-07-20 05:56:31,506 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-20 05:56:31,507 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-20 05:56:31,507 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-20 05:56:31,507 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-20 05:56:31,507 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-20 05:56:31,507 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-20 05:56:31,508 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-20 05:56:31,508 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-20 05:56:31,508 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-20 05:56:31,508 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-20 05:56:31,508 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-20 05:56:31,508 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-07-20 05:56:31,509 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-07-20 05:56:31,509 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-20 05:56:31,509 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-20 05:56:31,509 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-20 05:56:31,509 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-20 05:56:31,510 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-20 05:56:31,510 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-20 05:56:31,510 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-20 05:56:31,510 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-20 05:56:31,510 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-07-20 05:56:31,511 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-07-20 05:56:31,511 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-07-20 05:56:31,511 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e94333448b9ec2a5ffed0adee00d968fb025c54e55196475ef51117fcee9fc3a [2022-07-20 05:56:31,820 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-20 05:56:31,840 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-20 05:56:31,843 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-20 05:56:31,845 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-20 05:56:31,845 INFO L275 PluginConnector]: CDTParser initialized [2022-07-20 05:56:31,847 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-memsafety/memleaks_test15-1.i [2022-07-20 05:56:31,907 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c3c5473ed/509b83151948415690db9c5cbff61dc4/FLAG53fc6fe94 [2022-07-20 05:56:32,347 INFO L306 CDTParser]: Found 1 translation units. [2022-07-20 05:56:32,351 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-memsafety/memleaks_test15-1.i [2022-07-20 05:56:32,370 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c3c5473ed/509b83151948415690db9c5cbff61dc4/FLAG53fc6fe94 [2022-07-20 05:56:32,389 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c3c5473ed/509b83151948415690db9c5cbff61dc4 [2022-07-20 05:56:32,391 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-20 05:56:32,392 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-20 05:56:32,395 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-20 05:56:32,395 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-20 05:56:32,398 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-20 05:56:32,398 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 05:56:32" (1/1) ... [2022-07-20 05:56:32,399 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@76c73f94 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:56:32, skipping insertion in model container [2022-07-20 05:56:32,399 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 05:56:32" (1/1) ... [2022-07-20 05:56:32,405 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-20 05:56:32,447 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-20 05:56:32,865 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 05:56:32,878 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-07-20 05:56:32,891 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-20 05:56:32,936 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 05:56:32,944 INFO L203 MainTranslator]: Completed pre-run [2022-07-20 05:56:32,988 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 05:56:33,029 INFO L208 MainTranslator]: Completed translation [2022-07-20 05:56:33,030 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:56:33 WrapperNode [2022-07-20 05:56:33,030 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-20 05:56:33,031 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-20 05:56:33,031 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-20 05:56:33,031 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-20 05:56:33,037 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:56:33" (1/1) ... [2022-07-20 05:56:33,070 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:56:33" (1/1) ... [2022-07-20 05:56:33,095 INFO L137 Inliner]: procedures = 176, calls = 103, calls flagged for inlining = 31, calls inlined = 14, statements flattened = 170 [2022-07-20 05:56:33,096 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-20 05:56:33,097 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-20 05:56:33,097 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-20 05:56:33,097 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-20 05:56:33,104 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:56:33" (1/1) ... [2022-07-20 05:56:33,104 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:56:33" (1/1) ... [2022-07-20 05:56:33,108 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:56:33" (1/1) ... [2022-07-20 05:56:33,109 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:56:33" (1/1) ... [2022-07-20 05:56:33,119 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:56:33" (1/1) ... [2022-07-20 05:56:33,121 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:56:33" (1/1) ... [2022-07-20 05:56:33,124 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:56:33" (1/1) ... [2022-07-20 05:56:33,127 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-20 05:56:33,128 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-20 05:56:33,128 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-20 05:56:33,128 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-20 05:56:33,129 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:56:33" (1/1) ... [2022-07-20 05:56:33,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-20 05:56:33,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:56:33,156 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-20 05:56:33,179 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-20 05:56:33,203 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2022-07-20 05:56:33,203 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-20 05:56:33,203 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-20 05:56:33,204 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-20 05:56:33,204 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-20 05:56:33,204 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2022-07-20 05:56:33,204 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-07-20 05:56:33,204 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-20 05:56:33,204 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-07-20 05:56:33,205 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2022-07-20 05:56:33,205 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2022-07-20 05:56:33,205 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-20 05:56:33,205 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-20 05:56:33,309 INFO L234 CfgBuilder]: Building ICFG [2022-07-20 05:56:33,310 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-20 05:56:33,763 INFO L275 CfgBuilder]: Performing block encoding [2022-07-20 05:56:33,769 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-20 05:56:33,769 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-07-20 05:56:33,771 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 05:56:33 BoogieIcfgContainer [2022-07-20 05:56:33,771 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-20 05:56:33,773 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-20 05:56:33,773 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-20 05:56:33,776 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-20 05:56:33,776 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 05:56:32" (1/3) ... [2022-07-20 05:56:33,776 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@773598d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 05:56:33, skipping insertion in model container [2022-07-20 05:56:33,777 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:56:33" (2/3) ... [2022-07-20 05:56:33,777 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@773598d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 05:56:33, skipping insertion in model container [2022-07-20 05:56:33,777 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 05:56:33" (3/3) ... [2022-07-20 05:56:33,778 INFO L111 eAbstractionObserver]: Analyzing ICFG memleaks_test15-1.i [2022-07-20 05:56:33,789 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-20 05:56:33,790 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 50 error locations. [2022-07-20 05:56:33,824 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-20 05:56:33,829 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@3831d322, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@7901b132 [2022-07-20 05:56:33,829 INFO L358 AbstractCegarLoop]: Starting to check reachability of 50 error locations. [2022-07-20 05:56:33,833 INFO L276 IsEmpty]: Start isEmpty. Operand has 129 states, 73 states have (on average 1.821917808219178) internal successors, (133), 123 states have internal predecessors, (133), 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) [2022-07-20 05:56:33,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-20 05:56:33,838 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:56:33,839 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:56:33,840 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr49ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2022-07-20 05:56:33,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:56:33,850 INFO L85 PathProgramCache]: Analyzing trace with hash -599633160, now seen corresponding path program 1 times [2022-07-20 05:56:33,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 05:56:33,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1303151154] [2022-07-20 05:56:33,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:56:33,861 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 05:56:33,862 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 05:56:33,870 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 05:56:33,905 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-07-20 05:56:33,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:56:33,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-20 05:56:33,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:56:34,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:56:34,047 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 05:56:34,048 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 05:56:34,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1303151154] [2022-07-20 05:56:34,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1303151154] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:56:34,050 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:56:34,051 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-20 05:56:34,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172234286] [2022-07-20 05:56:34,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:56:34,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-20 05:56:34,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 05:56:34,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-20 05:56:34,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-20 05:56:34,081 INFO L87 Difference]: Start difference. First operand has 129 states, 73 states have (on average 1.821917808219178) internal successors, (133), 123 states have internal predecessors, (133), 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) Second operand has 6 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-20 05:56:34,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:56:34,174 INFO L93 Difference]: Finished difference Result 129 states and 140 transitions. [2022-07-20 05:56:34,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-20 05:56:34,176 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-07-20 05:56:34,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:56:34,182 INFO L225 Difference]: With dead ends: 129 [2022-07-20 05:56:34,182 INFO L226 Difference]: Without dead ends: 127 [2022-07-20 05:56:34,184 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-20 05:56:34,186 INFO L413 NwaCegarLoop]: 128 mSDtfsCounter, 128 mSDsluCounter, 383 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 511 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 05:56:34,187 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 511 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 05:56:34,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-07-20 05:56:34,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2022-07-20 05:56:34,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 72 states have (on average 1.8055555555555556) internal successors, (130), 121 states have internal predecessors, (130), 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) [2022-07-20 05:56:34,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 138 transitions. [2022-07-20 05:56:34,218 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 138 transitions. Word has length 11 [2022-07-20 05:56:34,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:56:34,219 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 138 transitions. [2022-07-20 05:56:34,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-20 05:56:34,219 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 138 transitions. [2022-07-20 05:56:34,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-07-20 05:56:34,220 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:56:34,220 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:56:34,230 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2022-07-20 05:56:34,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 05:56:34,429 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr46ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2022-07-20 05:56:34,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:56:34,430 INFO L85 PathProgramCache]: Analyzing trace with hash 518474697, now seen corresponding path program 1 times [2022-07-20 05:56:34,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 05:56:34,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [238815582] [2022-07-20 05:56:34,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:56:34,431 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 05:56:34,431 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 05:56:34,432 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 05:56:34,434 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-07-20 05:56:34,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:56:34,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-20 05:56:34,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:56:34,538 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:56:34,538 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 05:56:34,538 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 05:56:34,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [238815582] [2022-07-20 05:56:34,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [238815582] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:56:34,539 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:56:34,539 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-20 05:56:34,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006448143] [2022-07-20 05:56:34,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:56:34,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-20 05:56:34,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 05:56:34,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-20 05:56:34,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-20 05:56:34,541 INFO L87 Difference]: Start difference. First operand 127 states and 138 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 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) [2022-07-20 05:56:34,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:56:34,649 INFO L93 Difference]: Finished difference Result 127 states and 137 transitions. [2022-07-20 05:56:34,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-20 05:56:34,650 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 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 17 [2022-07-20 05:56:34,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:56:34,651 INFO L225 Difference]: With dead ends: 127 [2022-07-20 05:56:34,651 INFO L226 Difference]: Without dead ends: 127 [2022-07-20 05:56:34,651 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-20 05:56:34,652 INFO L413 NwaCegarLoop]: 117 mSDtfsCounter, 123 mSDsluCounter, 353 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 470 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 05:56:34,653 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 470 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 05:56:34,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-07-20 05:56:34,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2022-07-20 05:56:34,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 72 states have (on average 1.7916666666666667) internal successors, (129), 121 states have internal predecessors, (129), 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) [2022-07-20 05:56:34,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 137 transitions. [2022-07-20 05:56:34,661 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 137 transitions. Word has length 17 [2022-07-20 05:56:34,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:56:34,662 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 137 transitions. [2022-07-20 05:56:34,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 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) [2022-07-20 05:56:34,662 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 137 transitions. [2022-07-20 05:56:34,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-07-20 05:56:34,663 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:56:34,663 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:56:34,678 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-07-20 05:56:34,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 05:56:34,872 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2022-07-20 05:56:34,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:56:34,872 INFO L85 PathProgramCache]: Analyzing trace with hash -222458304, now seen corresponding path program 1 times [2022-07-20 05:56:34,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 05:56:34,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1066162753] [2022-07-20 05:56:34,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:56:34,873 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 05:56:34,873 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 05:56:34,875 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 05:56:34,875 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-07-20 05:56:34,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:56:34,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-20 05:56:34,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:56:35,023 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-20 05:56:35,158 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-20 05:56:35,159 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 17 treesize of output 24 [2022-07-20 05:56:35,170 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:56:35,171 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:56:35,370 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:56:35,370 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 05:56:35,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1066162753] [2022-07-20 05:56:35,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1066162753] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:56:35,370 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 05:56:35,370 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2022-07-20 05:56:35,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357168801] [2022-07-20 05:56:35,371 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 05:56:35,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-20 05:56:35,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 05:56:35,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-20 05:56:35,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-07-20 05:56:35,375 INFO L87 Difference]: Start difference. First operand 127 states and 137 transitions. Second operand has 9 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-20 05:56:35,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:56:35,770 INFO L93 Difference]: Finished difference Result 161 states and 174 transitions. [2022-07-20 05:56:35,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-20 05:56:35,770 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 22 [2022-07-20 05:56:35,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:56:35,772 INFO L225 Difference]: With dead ends: 161 [2022-07-20 05:56:35,772 INFO L226 Difference]: Without dead ends: 161 [2022-07-20 05:56:35,772 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-07-20 05:56:35,773 INFO L413 NwaCegarLoop]: 93 mSDtfsCounter, 77 mSDsluCounter, 489 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 582 SdHoareTripleChecker+Invalid, 366 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 70 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-20 05:56:35,773 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 582 Invalid, 366 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 288 Invalid, 0 Unknown, 70 Unchecked, 0.3s Time] [2022-07-20 05:56:35,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2022-07-20 05:56:35,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 140. [2022-07-20 05:56:35,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 88 states have (on average 1.75) internal successors, (154), 134 states have internal predecessors, (154), 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) [2022-07-20 05:56:35,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 162 transitions. [2022-07-20 05:56:35,782 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 162 transitions. Word has length 22 [2022-07-20 05:56:35,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:56:35,782 INFO L495 AbstractCegarLoop]: Abstraction has 140 states and 162 transitions. [2022-07-20 05:56:35,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-20 05:56:35,783 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 162 transitions. [2022-07-20 05:56:35,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-07-20 05:56:35,783 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:56:35,783 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:56:35,798 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-07-20 05:56:35,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 05:56:35,993 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2022-07-20 05:56:35,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:56:35,993 INFO L85 PathProgramCache]: Analyzing trace with hash -222458303, now seen corresponding path program 1 times [2022-07-20 05:56:35,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 05:56:35,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [785965329] [2022-07-20 05:56:35,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:56:35,994 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 05:56:35,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 05:56:35,995 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 05:56:35,997 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-07-20 05:56:36,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:56:36,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-20 05:56:36,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:56:36,086 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-20 05:56:36,091 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-20 05:56:36,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 05:56:36,250 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-20 05:56:36,259 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-20 05:56:36,260 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-07-20 05:56:36,282 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:56:36,282 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:56:38,528 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 05:56:38,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [785965329] [2022-07-20 05:56:38,528 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [785965329] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:56:38,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [733159323] [2022-07-20 05:56:38,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:56:38,529 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-20 05:56:38,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-20 05:56:38,532 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-20 05:56:38,540 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (6)] Waiting until timeout for monitored process [2022-07-20 05:56:38,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:56:38,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-20 05:56:38,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:56:38,727 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-20 05:56:38,733 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-20 05:56:40,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 05:56:40,871 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-20 05:56:40,886 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-20 05:56:40,887 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-07-20 05:56:40,892 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:56:40,892 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:56:43,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [733159323] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:56:43,259 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 05:56:43,259 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2022-07-20 05:56:43,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135107640] [2022-07-20 05:56:43,259 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 05:56:43,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-20 05:56:43,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 05:56:43,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-20 05:56:43,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=86, Unknown=1, NotChecked=0, Total=110 [2022-07-20 05:56:43,262 INFO L87 Difference]: Start difference. First operand 140 states and 162 transitions. Second operand has 9 states, 8 states have (on average 2.0) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-20 05:56:44,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:56:44,004 INFO L93 Difference]: Finished difference Result 180 states and 192 transitions. [2022-07-20 05:56:44,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-20 05:56:44,005 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.0) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2022-07-20 05:56:44,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:56:44,006 INFO L225 Difference]: With dead ends: 180 [2022-07-20 05:56:44,006 INFO L226 Difference]: Without dead ends: 180 [2022-07-20 05:56:44,007 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=31, Invalid=124, Unknown=1, NotChecked=0, Total=156 [2022-07-20 05:56:44,007 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 161 mSDsluCounter, 385 mSDsCounter, 0 mSdLazyCounter, 351 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 464 SdHoareTripleChecker+Invalid, 438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 72 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-20 05:56:44,008 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [161 Valid, 464 Invalid, 438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 351 Invalid, 0 Unknown, 72 Unchecked, 0.7s Time] [2022-07-20 05:56:44,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2022-07-20 05:56:44,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 151. [2022-07-20 05:56:44,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 102 states have (on average 1.6862745098039216) internal successors, (172), 145 states have internal predecessors, (172), 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) [2022-07-20 05:56:44,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 180 transitions. [2022-07-20 05:56:44,016 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 180 transitions. Word has length 22 [2022-07-20 05:56:44,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:56:44,016 INFO L495 AbstractCegarLoop]: Abstraction has 151 states and 180 transitions. [2022-07-20 05:56:44,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.0) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-20 05:56:44,017 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 180 transitions. [2022-07-20 05:56:44,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-07-20 05:56:44,017 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:56:44,018 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:56:44,026 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-07-20 05:56:44,225 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (6)] Ended with exit code 0 [2022-07-20 05:56:44,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2022-07-20 05:56:44,424 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2022-07-20 05:56:44,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:56:44,424 INFO L85 PathProgramCache]: Analyzing trace with hash -126280059, now seen corresponding path program 1 times [2022-07-20 05:56:44,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 05:56:44,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [855345308] [2022-07-20 05:56:44,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:56:44,425 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 05:56:44,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 05:56:44,426 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 05:56:44,427 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-07-20 05:56:44,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:56:44,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-20 05:56:44,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:56:44,513 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-20 05:56:44,550 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 [2022-07-20 05:56:44,586 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 21 treesize of output 9 [2022-07-20 05:56:44,601 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-20 05:56:44,601 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 05:56:44,601 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 05:56:44,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [855345308] [2022-07-20 05:56:44,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [855345308] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:56:44,601 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:56:44,601 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-20 05:56:44,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657204603] [2022-07-20 05:56:44,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:56:44,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-20 05:56:44,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 05:56:44,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-20 05:56:44,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-20 05:56:44,603 INFO L87 Difference]: Start difference. First operand 151 states and 180 transitions. Second operand has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-20 05:56:45,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:56:45,076 INFO L93 Difference]: Finished difference Result 151 states and 179 transitions. [2022-07-20 05:56:45,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-20 05:56:45,077 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 27 [2022-07-20 05:56:45,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:56:45,078 INFO L225 Difference]: With dead ends: 151 [2022-07-20 05:56:45,078 INFO L226 Difference]: Without dead ends: 151 [2022-07-20 05:56:45,078 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-07-20 05:56:45,079 INFO L413 NwaCegarLoop]: 120 mSDtfsCounter, 10 mSDsluCounter, 374 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 494 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-20 05:56:45,079 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 494 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 269 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-20 05:56:45,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2022-07-20 05:56:45,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 150. [2022-07-20 05:56:45,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 102 states have (on average 1.6764705882352942) internal successors, (171), 144 states have internal predecessors, (171), 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) [2022-07-20 05:56:45,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 179 transitions. [2022-07-20 05:56:45,087 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 179 transitions. Word has length 27 [2022-07-20 05:56:45,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:56:45,088 INFO L495 AbstractCegarLoop]: Abstraction has 150 states and 179 transitions. [2022-07-20 05:56:45,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-20 05:56:45,088 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 179 transitions. [2022-07-20 05:56:45,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-07-20 05:56:45,095 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:56:45,095 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:56:45,102 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-07-20 05:56:45,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 05:56:45,296 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2022-07-20 05:56:45,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:56:45,297 INFO L85 PathProgramCache]: Analyzing trace with hash -126280058, now seen corresponding path program 1 times [2022-07-20 05:56:45,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 05:56:45,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2058828676] [2022-07-20 05:56:45,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:56:45,297 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 05:56:45,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 05:56:45,298 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 05:56:45,299 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-07-20 05:56:45,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:56:45,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-20 05:56:45,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:56:45,396 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-20 05:56:45,464 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 [2022-07-20 05:56:45,474 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 [2022-07-20 05:56:45,536 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 [2022-07-20 05:56:45,541 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 21 treesize of output 9 [2022-07-20 05:56:45,563 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-20 05:56:45,564 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 05:56:45,564 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 05:56:45,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2058828676] [2022-07-20 05:56:45,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2058828676] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:56:45,564 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:56:45,564 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-20 05:56:45,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656718006] [2022-07-20 05:56:45,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:56:45,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-20 05:56:45,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 05:56:45,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-20 05:56:45,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-20 05:56:45,566 INFO L87 Difference]: Start difference. First operand 150 states and 179 transitions. Second operand has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-20 05:56:46,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:56:46,104 INFO L93 Difference]: Finished difference Result 159 states and 186 transitions. [2022-07-20 05:56:46,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-20 05:56:46,104 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 27 [2022-07-20 05:56:46,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:56:46,105 INFO L225 Difference]: With dead ends: 159 [2022-07-20 05:56:46,105 INFO L226 Difference]: Without dead ends: 159 [2022-07-20 05:56:46,106 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-07-20 05:56:46,106 INFO L413 NwaCegarLoop]: 116 mSDtfsCounter, 17 mSDsluCounter, 417 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 533 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-20 05:56:46,107 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 533 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-20 05:56:46,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2022-07-20 05:56:46,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 149. [2022-07-20 05:56:46,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 102 states have (on average 1.6666666666666667) internal successors, (170), 143 states have internal predecessors, (170), 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) [2022-07-20 05:56:46,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 178 transitions. [2022-07-20 05:56:46,112 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 178 transitions. Word has length 27 [2022-07-20 05:56:46,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:56:46,112 INFO L495 AbstractCegarLoop]: Abstraction has 149 states and 178 transitions. [2022-07-20 05:56:46,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-20 05:56:46,112 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 178 transitions. [2022-07-20 05:56:46,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-07-20 05:56:46,113 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:56:46,113 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:56:46,123 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-07-20 05:56:46,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 05:56:46,323 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr44ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2022-07-20 05:56:46,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:56:46,323 INFO L85 PathProgramCache]: Analyzing trace with hash -126277696, now seen corresponding path program 1 times [2022-07-20 05:56:46,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 05:56:46,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1492790673] [2022-07-20 05:56:46,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:56:46,324 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 05:56:46,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 05:56:46,325 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 05:56:46,326 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-07-20 05:56:46,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:56:46,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-20 05:56:46,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:56:46,438 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 13 treesize of output 9 [2022-07-20 05:56:46,461 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 20 treesize of output 8 [2022-07-20 05:56:46,474 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-20 05:56:46,474 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 05:56:46,474 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 05:56:46,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1492790673] [2022-07-20 05:56:46,475 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1492790673] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:56:46,475 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:56:46,475 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-20 05:56:46,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005464119] [2022-07-20 05:56:46,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:56:46,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-20 05:56:46,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 05:56:46,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-20 05:56:46,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-20 05:56:46,476 INFO L87 Difference]: Start difference. First operand 149 states and 178 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-20 05:56:46,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:56:46,678 INFO L93 Difference]: Finished difference Result 146 states and 173 transitions. [2022-07-20 05:56:46,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-20 05:56:46,679 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 27 [2022-07-20 05:56:46,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:56:46,680 INFO L225 Difference]: With dead ends: 146 [2022-07-20 05:56:46,680 INFO L226 Difference]: Without dead ends: 146 [2022-07-20 05:56:46,680 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-07-20 05:56:46,681 INFO L413 NwaCegarLoop]: 122 mSDtfsCounter, 5 mSDsluCounter, 575 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 697 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 05:56:46,681 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 697 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-20 05:56:46,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-07-20 05:56:46,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2022-07-20 05:56:46,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 99 states have (on average 1.6666666666666667) internal successors, (165), 140 states have internal predecessors, (165), 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) [2022-07-20 05:56:46,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 173 transitions. [2022-07-20 05:56:46,687 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 173 transitions. Word has length 27 [2022-07-20 05:56:46,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:56:46,687 INFO L495 AbstractCegarLoop]: Abstraction has 146 states and 173 transitions. [2022-07-20 05:56:46,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-20 05:56:46,687 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 173 transitions. [2022-07-20 05:56:46,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-20 05:56:46,688 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:56:46,688 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:56:46,701 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-07-20 05:56:46,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 05:56:46,889 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2022-07-20 05:56:46,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:56:46,890 INFO L85 PathProgramCache]: Analyzing trace with hash -1096052090, now seen corresponding path program 1 times [2022-07-20 05:56:46,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 05:56:46,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1678589774] [2022-07-20 05:56:46,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:56:46,890 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 05:56:46,891 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 05:56:46,892 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 05:56:46,894 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-07-20 05:56:46,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:56:46,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-20 05:56:46,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:56:47,001 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-20 05:56:47,130 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-20 05:56:47,130 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 17 treesize of output 24 [2022-07-20 05:56:51,225 INFO L356 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2022-07-20 05:56:51,226 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 [2022-07-20 05:56:51,263 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 [2022-07-20 05:56:51,333 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 11 treesize of output 5 [2022-07-20 05:56:51,351 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 3 refuted. 3 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:56:51,352 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:56:51,707 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-20 05:56:51,708 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 05:56:51,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1678589774] [2022-07-20 05:56:51,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1678589774] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:56:51,708 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 05:56:51,708 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6] total 12 [2022-07-20 05:56:51,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117029917] [2022-07-20 05:56:51,709 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 05:56:51,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-20 05:56:51,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 05:56:51,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-20 05:56:51,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=123, Unknown=2, NotChecked=0, Total=156 [2022-07-20 05:56:51,710 INFO L87 Difference]: Start difference. First operand 146 states and 173 transitions. Second operand has 13 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 10 states have internal predecessors, (31), 2 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-20 05:56:58,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:56:58,339 INFO L93 Difference]: Finished difference Result 166 states and 181 transitions. [2022-07-20 05:56:58,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-20 05:56:58,340 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 10 states have internal predecessors, (31), 2 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 29 [2022-07-20 05:56:58,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:56:58,341 INFO L225 Difference]: With dead ends: 166 [2022-07-20 05:56:58,341 INFO L226 Difference]: Without dead ends: 166 [2022-07-20 05:56:58,342 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 36 SyntacticMatches, 9 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 10.4s TimeCoverageRelationStatistics Valid=56, Invalid=213, Unknown=3, NotChecked=0, Total=272 [2022-07-20 05:56:58,342 INFO L413 NwaCegarLoop]: 94 mSDtfsCounter, 64 mSDsluCounter, 554 mSDsCounter, 0 mSdLazyCounter, 348 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 648 SdHoareTripleChecker+Invalid, 408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 60 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-20 05:56:58,343 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 648 Invalid, 408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 348 Invalid, 0 Unknown, 60 Unchecked, 0.5s Time] [2022-07-20 05:56:58,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2022-07-20 05:56:58,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 149. [2022-07-20 05:56:58,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 102 states have (on average 1.6372549019607843) internal successors, (167), 142 states have internal predecessors, (167), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-20 05:56:58,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 175 transitions. [2022-07-20 05:56:58,348 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 175 transitions. Word has length 29 [2022-07-20 05:56:58,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:56:58,348 INFO L495 AbstractCegarLoop]: Abstraction has 149 states and 175 transitions. [2022-07-20 05:56:58,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 10 states have internal predecessors, (31), 2 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-20 05:56:58,348 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 175 transitions. [2022-07-20 05:56:58,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-20 05:56:58,349 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:56:58,349 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:56:58,358 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Ended with exit code 0 [2022-07-20 05:56:58,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 05:56:58,559 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2022-07-20 05:56:58,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:56:58,559 INFO L85 PathProgramCache]: Analyzing trace with hash -1096052089, now seen corresponding path program 1 times [2022-07-20 05:56:58,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 05:56:58,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [144693206] [2022-07-20 05:56:58,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:56:58,560 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 05:56:58,561 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 05:56:58,562 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 05:56:58,563 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-07-20 05:56:58,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:56:58,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 27 conjunts are in the unsatisfiable core [2022-07-20 05:56:58,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:56:58,667 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-20 05:56:58,673 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-20 05:56:58,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 05:56:58,867 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-20 05:56:58,890 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-20 05:56:58,890 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 17 treesize of output 24 [2022-07-20 05:57:00,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 05:57:00,990 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-20 05:57:01,000 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-20 05:57:01,000 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-07-20 05:57:01,060 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:57:01,060 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:57:05,389 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 05:57:05,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [144693206] [2022-07-20 05:57:05,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [144693206] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:57:05,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [952050545] [2022-07-20 05:57:05,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:57:05,389 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-20 05:57:05,389 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-20 05:57:05,390 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-20 05:57:05,391 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2022-07-20 05:57:05,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:57:05,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 27 conjunts are in the unsatisfiable core [2022-07-20 05:57:05,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:57:05,539 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-20 05:57:05,549 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-20 05:57:05,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 05:57:05,690 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-20 05:57:05,711 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-20 05:57:05,711 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 17 treesize of output 24 [2022-07-20 05:57:05,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 05:57:05,821 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-20 05:57:05,831 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-20 05:57:05,831 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-07-20 05:57:05,871 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:57:05,871 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:57:08,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [952050545] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:57:08,179 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 05:57:08,179 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2022-07-20 05:57:08,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871589206] [2022-07-20 05:57:08,179 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 05:57:08,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-20 05:57:08,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 05:57:08,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-20 05:57:08,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=103, Unknown=3, NotChecked=0, Total=132 [2022-07-20 05:57:08,181 INFO L87 Difference]: Start difference. First operand 149 states and 175 transitions. Second operand has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-20 05:57:08,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:57:08,780 INFO L93 Difference]: Finished difference Result 181 states and 191 transitions. [2022-07-20 05:57:08,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-20 05:57:08,781 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 29 [2022-07-20 05:57:08,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:57:08,782 INFO L225 Difference]: With dead ends: 181 [2022-07-20 05:57:08,782 INFO L226 Difference]: Without dead ends: 181 [2022-07-20 05:57:08,782 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 59 SyntacticMatches, 5 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=36, Invalid=143, Unknown=3, NotChecked=0, Total=182 [2022-07-20 05:57:08,782 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 81 mSDsluCounter, 408 mSDsCounter, 0 mSdLazyCounter, 381 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 485 SdHoareTripleChecker+Invalid, 458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 70 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-20 05:57:08,783 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 485 Invalid, 458 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 381 Invalid, 0 Unknown, 70 Unchecked, 0.5s Time] [2022-07-20 05:57:08,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2022-07-20 05:57:08,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 151. [2022-07-20 05:57:08,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 105 states have (on average 1.6285714285714286) internal successors, (171), 144 states have internal predecessors, (171), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-20 05:57:08,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 179 transitions. [2022-07-20 05:57:08,787 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 179 transitions. Word has length 29 [2022-07-20 05:57:08,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:57:08,787 INFO L495 AbstractCegarLoop]: Abstraction has 151 states and 179 transitions. [2022-07-20 05:57:08,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-20 05:57:08,788 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 179 transitions. [2022-07-20 05:57:08,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-07-20 05:57:08,788 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:57:08,789 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:57:08,798 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-07-20 05:57:09,000 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (12)] Forceful destruction successful, exit code 0 [2022-07-20 05:57:09,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2022-07-20 05:57:09,198 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2022-07-20 05:57:09,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:57:09,199 INFO L85 PathProgramCache]: Analyzing trace with hash -1039070521, now seen corresponding path program 1 times [2022-07-20 05:57:09,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 05:57:09,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [306163448] [2022-07-20 05:57:09,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:57:09,199 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 05:57:09,199 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 05:57:09,200 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 05:57:09,201 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-07-20 05:57:09,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:57:09,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-20 05:57:09,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:57:09,368 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-20 05:57:09,368 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 05:57:09,368 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 05:57:09,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [306163448] [2022-07-20 05:57:09,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [306163448] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:57:09,369 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:57:09,369 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 05:57:09,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806947950] [2022-07-20 05:57:09,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:57:09,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 05:57:09,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 05:57:09,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 05:57:09,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 05:57:09,370 INFO L87 Difference]: Start difference. First operand 151 states and 179 transitions. Second operand has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 states have internal predecessors, (19), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-20 05:57:09,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:57:09,555 INFO L93 Difference]: Finished difference Result 167 states and 184 transitions. [2022-07-20 05:57:09,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 05:57:09,555 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 states have internal predecessors, (19), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 31 [2022-07-20 05:57:09,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:57:09,556 INFO L225 Difference]: With dead ends: 167 [2022-07-20 05:57:09,556 INFO L226 Difference]: Without dead ends: 167 [2022-07-20 05:57:09,557 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-20 05:57:09,557 INFO L413 NwaCegarLoop]: 101 mSDtfsCounter, 109 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 05:57:09,558 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 238 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-20 05:57:09,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2022-07-20 05:57:09,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 150. [2022-07-20 05:57:09,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 105 states have (on average 1.619047619047619) internal successors, (170), 143 states have internal predecessors, (170), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-20 05:57:09,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 178 transitions. [2022-07-20 05:57:09,562 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 178 transitions. Word has length 31 [2022-07-20 05:57:09,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:57:09,562 INFO L495 AbstractCegarLoop]: Abstraction has 150 states and 178 transitions. [2022-07-20 05:57:09,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 states have internal predecessors, (19), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-20 05:57:09,562 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 178 transitions. [2022-07-20 05:57:09,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-07-20 05:57:09,562 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:57:09,563 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:57:09,575 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-07-20 05:57:09,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 05:57:09,773 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2022-07-20 05:57:09,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:57:09,773 INFO L85 PathProgramCache]: Analyzing trace with hash -1039070520, now seen corresponding path program 1 times [2022-07-20 05:57:09,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 05:57:09,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2053594219] [2022-07-20 05:57:09,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:57:09,774 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 05:57:09,774 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 05:57:09,776 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 05:57:09,779 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-07-20 05:57:09,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:57:09,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-20 05:57:09,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:57:09,975 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-20 05:57:09,975 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:57:10,094 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2022-07-20 05:57:10,314 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-20 05:57:10,314 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 05:57:10,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2053594219] [2022-07-20 05:57:10,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2053594219] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:57:10,314 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 05:57:10,314 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2022-07-20 05:57:10,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176647600] [2022-07-20 05:57:10,314 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 05:57:10,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-20 05:57:10,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 05:57:10,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-20 05:57:10,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-07-20 05:57:10,315 INFO L87 Difference]: Start difference. First operand 150 states and 178 transitions. Second operand has 14 states, 13 states have (on average 3.0) internal successors, (39), 12 states have internal predecessors, (39), 3 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-20 05:57:11,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:57:11,014 INFO L93 Difference]: Finished difference Result 172 states and 182 transitions. [2022-07-20 05:57:11,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-20 05:57:11,015 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.0) internal successors, (39), 12 states have internal predecessors, (39), 3 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 31 [2022-07-20 05:57:11,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:57:11,016 INFO L225 Difference]: With dead ends: 172 [2022-07-20 05:57:11,016 INFO L226 Difference]: Without dead ends: 172 [2022-07-20 05:57:11,017 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-07-20 05:57:11,017 INFO L413 NwaCegarLoop]: 95 mSDtfsCounter, 444 mSDsluCounter, 584 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 444 SdHoareTripleChecker+Valid, 679 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-20 05:57:11,017 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [444 Valid, 679 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 238 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-20 05:57:11,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2022-07-20 05:57:11,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 145. [2022-07-20 05:57:11,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 102 states have (on average 1.5980392156862746) internal successors, (163), 138 states have internal predecessors, (163), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-20 05:57:11,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 171 transitions. [2022-07-20 05:57:11,021 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 171 transitions. Word has length 31 [2022-07-20 05:57:11,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:57:11,021 INFO L495 AbstractCegarLoop]: Abstraction has 145 states and 171 transitions. [2022-07-20 05:57:11,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.0) internal successors, (39), 12 states have internal predecessors, (39), 3 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-20 05:57:11,022 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 171 transitions. [2022-07-20 05:57:11,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-07-20 05:57:11,022 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:57:11,023 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:57:11,031 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-07-20 05:57:11,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 05:57:11,227 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2022-07-20 05:57:11,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:57:11,228 INFO L85 PathProgramCache]: Analyzing trace with hash -2114357432, now seen corresponding path program 1 times [2022-07-20 05:57:11,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 05:57:11,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1056397440] [2022-07-20 05:57:11,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:57:11,228 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 05:57:11,229 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 05:57:11,230 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 05:57:11,232 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-07-20 05:57:11,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:57:11,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-20 05:57:11,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:57:11,485 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 [2022-07-20 05:57:11,531 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 [2022-07-20 05:57:11,561 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-20 05:57:11,561 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:57:11,691 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-20 05:57:11,691 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 05:57:11,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1056397440] [2022-07-20 05:57:11,691 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1056397440] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-20 05:57:11,692 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-20 05:57:11,692 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [11] total 14 [2022-07-20 05:57:11,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669991701] [2022-07-20 05:57:11,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:57:11,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-20 05:57:11,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 05:57:11,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-20 05:57:11,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2022-07-20 05:57:11,693 INFO L87 Difference]: Start difference. First operand 145 states and 171 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-20 05:57:12,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:57:12,235 INFO L93 Difference]: Finished difference Result 161 states and 176 transitions. [2022-07-20 05:57:12,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-20 05:57:12,235 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 33 [2022-07-20 05:57:12,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:57:12,236 INFO L225 Difference]: With dead ends: 161 [2022-07-20 05:57:12,236 INFO L226 Difference]: Without dead ends: 161 [2022-07-20 05:57:12,237 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2022-07-20 05:57:12,237 INFO L413 NwaCegarLoop]: 95 mSDtfsCounter, 127 mSDsluCounter, 342 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 437 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-20 05:57:12,238 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 437 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-20 05:57:12,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2022-07-20 05:57:12,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 144. [2022-07-20 05:57:12,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 102 states have (on average 1.588235294117647) internal successors, (162), 137 states have internal predecessors, (162), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-20 05:57:12,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 170 transitions. [2022-07-20 05:57:12,242 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 170 transitions. Word has length 33 [2022-07-20 05:57:12,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:57:12,242 INFO L495 AbstractCegarLoop]: Abstraction has 144 states and 170 transitions. [2022-07-20 05:57:12,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-20 05:57:12,242 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 170 transitions. [2022-07-20 05:57:12,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-07-20 05:57:12,243 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:57:12,243 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:57:12,252 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-07-20 05:57:12,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 05:57:12,451 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2022-07-20 05:57:12,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:57:12,452 INFO L85 PathProgramCache]: Analyzing trace with hash -2114357431, now seen corresponding path program 1 times [2022-07-20 05:57:12,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 05:57:12,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2077756590] [2022-07-20 05:57:12,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:57:12,452 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 05:57:12,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 05:57:12,454 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 05:57:12,456 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-07-20 05:57:12,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:57:12,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 30 conjunts are in the unsatisfiable core [2022-07-20 05:57:12,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:57:12,715 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 [2022-07-20 05:57:12,720 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 [2022-07-20 05:57:12,773 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 [2022-07-20 05:57:12,777 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-20 05:57:12,835 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-20 05:57:12,835 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:57:13,200 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2022-07-20 05:57:13,468 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-20 05:57:13,468 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 05:57:13,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2077756590] [2022-07-20 05:57:13,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2077756590] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:57:13,469 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 05:57:13,469 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 21 [2022-07-20 05:57:13,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369180892] [2022-07-20 05:57:13,469 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 05:57:13,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-20 05:57:13,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 05:57:13,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-20 05:57:13,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462 [2022-07-20 05:57:13,470 INFO L87 Difference]: Start difference. First operand 144 states and 170 transitions. Second operand has 22 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 19 states have internal predecessors, (43), 4 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-07-20 05:57:15,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:57:15,021 INFO L93 Difference]: Finished difference Result 169 states and 179 transitions. [2022-07-20 05:57:15,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-20 05:57:15,022 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 19 states have internal predecessors, (43), 4 states have call successors, (5), 1 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 33 [2022-07-20 05:57:15,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:57:15,023 INFO L225 Difference]: With dead ends: 169 [2022-07-20 05:57:15,023 INFO L226 Difference]: Without dead ends: 169 [2022-07-20 05:57:15,023 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=124, Invalid=632, Unknown=0, NotChecked=0, Total=756 [2022-07-20 05:57:15,024 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 533 mSDsluCounter, 1001 mSDsCounter, 0 mSdLazyCounter, 576 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 534 SdHoareTripleChecker+Valid, 1084 SdHoareTripleChecker+Invalid, 592 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 576 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-07-20 05:57:15,024 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [534 Valid, 1084 Invalid, 592 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 576 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-07-20 05:57:15,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2022-07-20 05:57:15,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 138. [2022-07-20 05:57:15,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 98 states have (on average 1.5612244897959184) internal successors, (153), 131 states have internal predecessors, (153), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-20 05:57:15,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 161 transitions. [2022-07-20 05:57:15,028 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 161 transitions. Word has length 33 [2022-07-20 05:57:15,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:57:15,029 INFO L495 AbstractCegarLoop]: Abstraction has 138 states and 161 transitions. [2022-07-20 05:57:15,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 19 states have internal predecessors, (43), 4 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-07-20 05:57:15,029 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 161 transitions. [2022-07-20 05:57:15,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-07-20 05:57:15,030 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:57:15,030 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2022-07-20 05:57:15,039 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2022-07-20 05:57:15,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 05:57:15,240 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2022-07-20 05:57:15,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:57:15,240 INFO L85 PathProgramCache]: Analyzing trace with hash -1120570930, now seen corresponding path program 1 times [2022-07-20 05:57:15,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 05:57:15,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1012982925] [2022-07-20 05:57:15,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:57:15,241 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 05:57:15,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 05:57:15,242 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 05:57:15,251 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-07-20 05:57:15,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:57:15,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 59 conjunts are in the unsatisfiable core [2022-07-20 05:57:15,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:57:15,415 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-20 05:57:15,575 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-20 05:57:15,575 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 17 treesize of output 24 [2022-07-20 05:57:15,740 INFO L356 Elim1Store]: treesize reduction 30, result has 45.5 percent of original size [2022-07-20 05:57:15,740 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 23 treesize of output 40 [2022-07-20 05:57:15,815 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-20 05:57:16,112 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-20 05:57:16,112 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 43 [2022-07-20 05:57:16,162 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 [2022-07-20 05:57:16,169 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 39 treesize of output 30 [2022-07-20 05:57:16,314 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 [2022-07-20 05:57:16,461 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:57:16,462 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 72 treesize of output 31 [2022-07-20 05:57:16,541 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:57:16,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:57:17,136 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_345 (Array (_ BitVec 32) (_ BitVec 32)))) (= (select |c_#valid| (let ((.cse1 (bvadd (_ bv4 32) |c_ULTIMATE.start_entry_point_~intf~2#1.offset|))) (select (select (let ((.cse0 (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_~intf~2#1.base|) .cse1) v_ArrVal_345))) (store .cse0 |c_ULTIMATE.start_entry_point_~hdev~0#1.base| (store (select .cse0 |c_ULTIMATE.start_entry_point_~hdev~0#1.base|) (bvadd |c_ULTIMATE.start_entry_point_~hdev~0#1.offset| (_ bv8 32)) |c_ULTIMATE.start_entry_point_~intf~2#1.base|))) |c_ULTIMATE.start_entry_point_~intf~2#1.base|) .cse1))) (_ bv1 1))) is different from false [2022-07-20 05:57:17,173 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:57:17,173 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 38 [2022-07-20 05:57:17,197 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:57:17,197 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 272 treesize of output 264 [2022-07-20 05:57:17,213 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 284 treesize of output 264 [2022-07-20 05:57:17,236 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 226 treesize of output 210 [2022-07-20 05:57:18,679 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 134 treesize of output 118 [2022-07-20 05:57:26,260 WARN L233 SmtUtils]: Spent 6.26s on a formula simplification. DAG size of input: 51 DAG size of output: 15 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-20 05:57:26,261 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 05:57:26,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1012982925] [2022-07-20 05:57:26,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1012982925] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:57:26,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [892888636] [2022-07-20 05:57:26,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:57:26,261 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-20 05:57:26,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-20 05:57:26,262 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-20 05:57:26,264 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2022-07-20 05:57:26,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:57:26,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 59 conjunts are in the unsatisfiable core [2022-07-20 05:57:26,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:57:26,460 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-20 05:57:26,534 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-20 05:57:26,534 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 24 [2022-07-20 05:57:26,639 INFO L356 Elim1Store]: treesize reduction 30, result has 45.5 percent of original size [2022-07-20 05:57:26,640 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 23 treesize of output 40 [2022-07-20 05:57:26,683 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-20 05:57:26,892 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-20 05:57:26,892 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 43 [2022-07-20 05:57:26,970 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 [2022-07-20 05:57:26,979 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 39 treesize of output 30 [2022-07-20 05:57:27,039 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 [2022-07-20 05:57:27,101 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:57:27,101 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 72 treesize of output 31 [2022-07-20 05:57:27,201 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:57:27,202 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:57:27,266 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_383 (Array (_ BitVec 32) (_ BitVec 32)))) (= (select |c_#valid| (select (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_#t~mem57#1.base| v_ArrVal_383))) (store .cse0 |c_ULTIMATE.start_entry_point_~hdev~0#1.base| (store (select .cse0 |c_ULTIMATE.start_entry_point_~hdev~0#1.base|) (bvadd |c_ULTIMATE.start_entry_point_~hdev~0#1.offset| (_ bv8 32)) |c_ULTIMATE.start_entry_point_~intf~2#1.base|))) |c_ULTIMATE.start_entry_point_~intf~2#1.base|) (bvadd (_ bv4 32) |c_ULTIMATE.start_entry_point_~intf~2#1.offset|))) (_ bv1 1))) is different from false [2022-07-20 05:57:27,296 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_383 (Array (_ BitVec 32) (_ BitVec 32)))) (= (select |c_#valid| (let ((.cse1 (bvadd (_ bv4 32) |c_ULTIMATE.start_entry_point_~intf~2#1.offset|))) (select (select (let ((.cse0 (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_~intf~2#1.base|) .cse1) v_ArrVal_383))) (store .cse0 |c_ULTIMATE.start_entry_point_~hdev~0#1.base| (store (select .cse0 |c_ULTIMATE.start_entry_point_~hdev~0#1.base|) (bvadd |c_ULTIMATE.start_entry_point_~hdev~0#1.offset| (_ bv8 32)) |c_ULTIMATE.start_entry_point_~intf~2#1.base|))) |c_ULTIMATE.start_entry_point_~intf~2#1.base|) .cse1))) (_ bv1 1))) is different from false [2022-07-20 05:57:27,338 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:57:27,338 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 38 [2022-07-20 05:57:27,366 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:57:27,366 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 360 treesize of output 350 [2022-07-20 05:57:27,386 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 406 treesize of output 374 [2022-07-20 05:57:27,479 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 226 treesize of output 210 [2022-07-20 05:57:33,760 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 131 treesize of output 115 [2022-07-20 05:57:36,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [892888636] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:57:36,405 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 05:57:36,405 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2022-07-20 05:57:36,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136644599] [2022-07-20 05:57:36,405 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 05:57:36,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-20 05:57:36,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 05:57:36,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-20 05:57:36,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=786, Unknown=6, NotChecked=174, Total=1056 [2022-07-20 05:57:36,407 INFO L87 Difference]: Start difference. First operand 138 states and 161 transitions. Second operand has 21 states, 20 states have (on average 1.4) internal successors, (28), 17 states have internal predecessors, (28), 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) [2022-07-20 05:57:37,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:57:37,925 INFO L93 Difference]: Finished difference Result 137 states and 160 transitions. [2022-07-20 05:57:37,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-20 05:57:37,926 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 1.4) internal successors, (28), 17 states have internal predecessors, (28), 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 34 [2022-07-20 05:57:37,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:57:37,927 INFO L225 Difference]: With dead ends: 137 [2022-07-20 05:57:37,927 INFO L226 Difference]: Without dead ends: 137 [2022-07-20 05:57:37,927 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 60 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 11.2s TimeCoverageRelationStatistics Valid=143, Invalid=1053, Unknown=6, NotChecked=204, Total=1406 [2022-07-20 05:57:37,928 INFO L413 NwaCegarLoop]: 100 mSDtfsCounter, 20 mSDsluCounter, 879 mSDsCounter, 0 mSdLazyCounter, 580 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 979 SdHoareTripleChecker+Invalid, 744 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 580 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 155 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-20 05:57:37,928 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 979 Invalid, 744 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 580 Invalid, 0 Unknown, 155 Unchecked, 0.8s Time] [2022-07-20 05:57:37,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-07-20 05:57:37,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2022-07-20 05:57:37,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 98 states have (on average 1.5510204081632653) internal successors, (152), 130 states have internal predecessors, (152), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-20 05:57:37,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 160 transitions. [2022-07-20 05:57:37,932 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 160 transitions. Word has length 34 [2022-07-20 05:57:37,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:57:37,932 INFO L495 AbstractCegarLoop]: Abstraction has 137 states and 160 transitions. [2022-07-20 05:57:37,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 1.4) internal successors, (28), 17 states have internal predecessors, (28), 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) [2022-07-20 05:57:37,932 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 160 transitions. [2022-07-20 05:57:37,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-07-20 05:57:37,933 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:57:37,933 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2022-07-20 05:57:37,943 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-07-20 05:57:38,146 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (18)] Ended with exit code 0 [2022-07-20 05:57:38,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2022-07-20 05:57:38,343 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2022-07-20 05:57:38,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:57:38,344 INFO L85 PathProgramCache]: Analyzing trace with hash -1120570929, now seen corresponding path program 1 times [2022-07-20 05:57:38,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 05:57:38,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [488677869] [2022-07-20 05:57:38,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:57:38,344 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 05:57:38,344 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 05:57:38,345 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 05:57:38,346 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-07-20 05:57:38,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:57:38,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 68 conjunts are in the unsatisfiable core [2022-07-20 05:57:38,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:57:38,480 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-20 05:57:38,612 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-20 05:57:38,613 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 17 treesize of output 24 [2022-07-20 05:57:38,700 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-20 05:57:38,787 INFO L356 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2022-07-20 05:57:38,787 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 21 [2022-07-20 05:57:38,846 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-20 05:57:38,859 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 13 treesize of output 9 [2022-07-20 05:57:39,079 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-20 05:57:39,079 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 53 [2022-07-20 05:57:39,091 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 24 [2022-07-20 05:57:39,139 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 39 treesize of output 30 [2022-07-20 05:57:39,150 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 27 treesize of output 26 [2022-07-20 05:57:39,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 05:57:39,554 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 05:57:39,559 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:57:39,559 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 95 treesize of output 47 [2022-07-20 05:57:39,576 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-07-20 05:57:39,577 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 18 [2022-07-20 05:57:39,639 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:57:39,639 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:57:40,682 WARN L833 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_423 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (let ((.cse1 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_entry_point_#t~mem57#1.base| v_ArrVal_423))) (store .cse1 |c_ULTIMATE.start_entry_point_~hdev~0#1.base| (store (select .cse1 |c_ULTIMATE.start_entry_point_~hdev~0#1.base|) (bvadd |c_ULTIMATE.start_entry_point_~hdev~0#1.offset| (_ bv8 32)) (bvadd (_ bv8 32) |c_ULTIMATE.start_entry_point_~intf~2#1.offset|)))) |c_ULTIMATE.start_entry_point_~intf~2#1.base|) (bvadd (_ bv4 32) |c_ULTIMATE.start_entry_point_~intf~2#1.offset|)))) (bvule (bvadd (_ bv7 32) .cse0) (bvadd (_ bv8 32) .cse0)))) (forall ((v_ArrVal_423 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_424 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse3 (bvadd |c_ULTIMATE.start_entry_point_~hdev~0#1.offset| (_ bv8 32))) (.cse4 (bvadd (_ bv4 32) |c_ULTIMATE.start_entry_point_~intf~2#1.offset|))) (bvule (bvadd (_ bv8 32) (select (select (let ((.cse2 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_entry_point_#t~mem57#1.base| v_ArrVal_423))) (store .cse2 |c_ULTIMATE.start_entry_point_~hdev~0#1.base| (store (select .cse2 |c_ULTIMATE.start_entry_point_~hdev~0#1.base|) .cse3 (bvadd (_ bv8 32) |c_ULTIMATE.start_entry_point_~intf~2#1.offset|)))) |c_ULTIMATE.start_entry_point_~intf~2#1.base|) .cse4)) (select |c_#length| (select (select (let ((.cse5 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_#t~mem57#1.base| v_ArrVal_424))) (store .cse5 |c_ULTIMATE.start_entry_point_~hdev~0#1.base| (store (select .cse5 |c_ULTIMATE.start_entry_point_~hdev~0#1.base|) .cse3 |c_ULTIMATE.start_entry_point_~intf~2#1.base|))) |c_ULTIMATE.start_entry_point_~intf~2#1.base|) .cse4)))))) is different from false [2022-07-20 05:57:40,739 WARN L833 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_423 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (let ((.cse2 (bvadd (_ bv4 32) |c_ULTIMATE.start_entry_point_~intf~2#1.offset|))) (select (select (let ((.cse1 (store |c_#memory_$Pointer$.offset| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_~intf~2#1.base|) .cse2) v_ArrVal_423))) (store .cse1 |c_ULTIMATE.start_entry_point_~hdev~0#1.base| (store (select .cse1 |c_ULTIMATE.start_entry_point_~hdev~0#1.base|) (bvadd |c_ULTIMATE.start_entry_point_~hdev~0#1.offset| (_ bv8 32)) (bvadd (_ bv8 32) |c_ULTIMATE.start_entry_point_~intf~2#1.offset|)))) |c_ULTIMATE.start_entry_point_~intf~2#1.base|) .cse2)))) (bvule (bvadd .cse0 (_ bv7 32)) (bvadd .cse0 (_ bv8 32))))) (forall ((v_ArrVal_423 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_424 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse6 (bvadd (_ bv4 32) |c_ULTIMATE.start_entry_point_~intf~2#1.offset|))) (let ((.cse4 (bvadd |c_ULTIMATE.start_entry_point_~hdev~0#1.offset| (_ bv8 32))) (.cse5 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_~intf~2#1.base|) .cse6))) (bvule (bvadd (select (select (let ((.cse3 (store |c_#memory_$Pointer$.offset| .cse5 v_ArrVal_423))) (store .cse3 |c_ULTIMATE.start_entry_point_~hdev~0#1.base| (store (select .cse3 |c_ULTIMATE.start_entry_point_~hdev~0#1.base|) .cse4 (bvadd (_ bv8 32) |c_ULTIMATE.start_entry_point_~intf~2#1.offset|)))) |c_ULTIMATE.start_entry_point_~intf~2#1.base|) .cse6) (_ bv8 32)) (select |c_#length| (select (select (let ((.cse7 (store |c_#memory_$Pointer$.base| .cse5 v_ArrVal_424))) (store .cse7 |c_ULTIMATE.start_entry_point_~hdev~0#1.base| (store (select .cse7 |c_ULTIMATE.start_entry_point_~hdev~0#1.base|) .cse4 |c_ULTIMATE.start_entry_point_~intf~2#1.base|))) |c_ULTIMATE.start_entry_point_~intf~2#1.base|) .cse6))))))) is different from false [2022-07-20 05:57:40,817 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:57:40,817 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 93 treesize of output 84 [2022-07-20 05:57:40,833 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:57:40,835 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 64 [2022-07-20 05:57:40,860 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:57:40,861 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 584 treesize of output 576 [2022-07-20 05:57:40,896 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:57:40,897 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 6144 treesize of output 5958 [2022-07-20 05:57:40,932 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 7118 treesize of output 6734 [2022-07-20 05:57:40,984 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 7654 treesize of output 7254