./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/array-memsafety/rec_strlen-alloca-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 5fbdf5bf 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/array-memsafety/rec_strlen-alloca-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 1915ee2ae984f6ece38fc0dcbac99e0ba37faddf .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-wip.dd.seqcomp-5fbdf5b [2021-08-30 16:40:09,369 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-30 16:40:09,371 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-30 16:40:09,392 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-30 16:40:09,393 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-30 16:40:09,393 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-30 16:40:09,394 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-30 16:40:09,401 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-30 16:40:09,402 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-30 16:40:09,403 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-30 16:40:09,403 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-30 16:40:09,404 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-30 16:40:09,404 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-30 16:40:09,405 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-30 16:40:09,406 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-30 16:40:09,409 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-30 16:40:09,412 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-30 16:40:09,421 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-30 16:40:09,422 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-30 16:40:09,423 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-30 16:40:09,424 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-30 16:40:09,435 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-30 16:40:09,436 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-30 16:40:09,436 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-30 16:40:09,438 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-30 16:40:09,438 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-30 16:40:09,438 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-30 16:40:09,439 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-30 16:40:09,439 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-30 16:40:09,440 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-30 16:40:09,440 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-30 16:40:09,440 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-30 16:40:09,456 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-30 16:40:09,457 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-30 16:40:09,457 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-30 16:40:09,457 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-30 16:40:09,458 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-30 16:40:09,458 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-30 16:40:09,458 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-30 16:40:09,459 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-30 16:40:09,459 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-30 16:40:09,461 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-08-30 16:40:09,480 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-30 16:40:09,481 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-30 16:40:09,481 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-30 16:40:09,481 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-30 16:40:09,482 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-30 16:40:09,482 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-30 16:40:09,482 INFO L138 SettingsManager]: * Use SBE=true [2021-08-30 16:40:09,482 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-30 16:40:09,483 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-30 16:40:09,483 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-08-30 16:40:09,483 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-30 16:40:09,483 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-30 16:40:09,483 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-30 16:40:09,483 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-08-30 16:40:09,483 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-08-30 16:40:09,483 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-08-30 16:40:09,484 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-30 16:40:09,490 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-08-30 16:40:09,490 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-30 16:40:09,490 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-30 16:40:09,490 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-30 16:40:09,491 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-30 16:40:09,491 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-30 16:40:09,491 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-30 16:40:09,491 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-30 16:40:09,491 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-30 16:40:09,491 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-30 16:40:09,491 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-30 16:40:09,492 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-30 16:40:09,492 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1915ee2ae984f6ece38fc0dcbac99e0ba37faddf [2021-08-30 16:40:09,737 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-30 16:40:09,755 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-30 16:40:09,757 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-30 16:40:09,758 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-30 16:40:09,758 INFO L275 PluginConnector]: CDTParser initialized [2021-08-30 16:40:09,759 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-memsafety/rec_strlen-alloca-1.i [2021-08-30 16:40:09,810 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3f9ba1c8e/76693083d55f4464a98818e4504731d3/FLAG5cea38c14 [2021-08-30 16:40:10,195 INFO L306 CDTParser]: Found 1 translation units. [2021-08-30 16:40:10,196 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/rec_strlen-alloca-1.i [2021-08-30 16:40:10,214 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3f9ba1c8e/76693083d55f4464a98818e4504731d3/FLAG5cea38c14 [2021-08-30 16:40:10,620 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3f9ba1c8e/76693083d55f4464a98818e4504731d3 [2021-08-30 16:40:10,622 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-30 16:40:10,624 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-08-30 16:40:10,626 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-30 16:40:10,626 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-30 16:40:10,628 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-30 16:40:10,629 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 04:40:10" (1/1) ... [2021-08-30 16:40:10,629 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@15206843 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:40:10, skipping insertion in model container [2021-08-30 16:40:10,629 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 04:40:10" (1/1) ... [2021-08-30 16:40:10,639 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-30 16:40:10,665 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-30 16:40:10,833 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-30 16:40:10,839 INFO L203 MainTranslator]: Completed pre-run [2021-08-30 16:40:10,890 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-30 16:40:10,910 INFO L208 MainTranslator]: Completed translation [2021-08-30 16:40:10,911 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:40:10 WrapperNode [2021-08-30 16:40:10,911 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-30 16:40:10,912 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-30 16:40:10,912 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-30 16:40:10,912 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-30 16:40:10,919 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:40:10" (1/1) ... [2021-08-30 16:40:10,920 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:40:10" (1/1) ... [2021-08-30 16:40:10,938 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:40:10" (1/1) ... [2021-08-30 16:40:10,938 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:40:10" (1/1) ... [2021-08-30 16:40:10,946 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:40:10" (1/1) ... [2021-08-30 16:40:10,948 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:40:10" (1/1) ... [2021-08-30 16:40:10,953 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:40:10" (1/1) ... [2021-08-30 16:40:10,956 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-30 16:40:10,957 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-30 16:40:10,957 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-30 16:40:10,957 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-30 16:40:10,957 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:40:10" (1/1) ... [2021-08-30 16:40:10,963 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-30 16:40:10,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:40:10,977 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-08-30 16:40:10,979 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-08-30 16:40:11,004 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-08-30 16:40:11,004 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-30 16:40:11,004 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-08-30 16:40:11,004 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-08-30 16:40:11,005 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2021-08-30 16:40:11,005 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2021-08-30 16:40:11,005 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2021-08-30 16:40:11,005 INFO L138 BoogieDeclarations]: Found implementation of procedure strlen_rec [2021-08-30 16:40:11,006 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-08-30 16:40:11,006 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-08-30 16:40:11,006 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-08-30 16:40:11,006 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-08-30 16:40:11,007 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-08-30 16:40:11,007 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-08-30 16:40:11,007 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-08-30 16:40:11,007 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-08-30 16:40:11,007 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-08-30 16:40:11,007 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-08-30 16:40:11,007 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-08-30 16:40:11,007 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-08-30 16:40:11,007 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-08-30 16:40:11,008 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-08-30 16:40:11,008 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-08-30 16:40:11,008 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-08-30 16:40:11,008 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-08-30 16:40:11,008 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-08-30 16:40:11,008 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-08-30 16:40:11,008 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2021-08-30 16:40:11,009 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2021-08-30 16:40:11,009 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2021-08-30 16:40:11,009 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-08-30 16:40:11,009 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-08-30 16:40:11,009 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-08-30 16:40:11,009 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-08-30 16:40:11,009 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-08-30 16:40:11,009 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-08-30 16:40:11,010 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-08-30 16:40:11,010 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-08-30 16:40:11,010 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-08-30 16:40:11,010 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-08-30 16:40:11,010 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-08-30 16:40:11,010 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-08-30 16:40:11,010 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-08-30 16:40:11,011 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-08-30 16:40:11,011 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-08-30 16:40:11,011 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-08-30 16:40:11,011 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-08-30 16:40:11,011 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-08-30 16:40:11,012 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-08-30 16:40:11,012 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-08-30 16:40:11,012 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-08-30 16:40:11,012 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-08-30 16:40:11,013 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-08-30 16:40:11,013 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-08-30 16:40:11,013 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-08-30 16:40:11,013 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-08-30 16:40:11,013 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-08-30 16:40:11,013 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-08-30 16:40:11,014 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-08-30 16:40:11,014 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-08-30 16:40:11,014 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-08-30 16:40:11,014 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-08-30 16:40:11,014 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-08-30 16:40:11,014 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-08-30 16:40:11,014 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-08-30 16:40:11,014 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-08-30 16:40:11,015 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-08-30 16:40:11,015 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-08-30 16:40:11,016 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-08-30 16:40:11,016 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-08-30 16:40:11,016 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-08-30 16:40:11,016 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-08-30 16:40:11,017 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-08-30 16:40:11,017 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-08-30 16:40:11,017 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-08-30 16:40:11,017 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-08-30 16:40:11,017 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-08-30 16:40:11,017 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-08-30 16:40:11,017 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-08-30 16:40:11,017 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-08-30 16:40:11,017 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-08-30 16:40:11,017 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-08-30 16:40:11,018 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-08-30 16:40:11,018 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-08-30 16:40:11,018 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-08-30 16:40:11,018 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-08-30 16:40:11,018 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-08-30 16:40:11,018 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-08-30 16:40:11,018 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-08-30 16:40:11,018 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-08-30 16:40:11,018 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-08-30 16:40:11,019 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-08-30 16:40:11,019 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-08-30 16:40:11,019 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-08-30 16:40:11,019 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-08-30 16:40:11,019 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-08-30 16:40:11,019 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-08-30 16:40:11,019 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-08-30 16:40:11,019 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-08-30 16:40:11,019 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-08-30 16:40:11,020 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-08-30 16:40:11,020 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-08-30 16:40:11,020 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-08-30 16:40:11,020 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-08-30 16:40:11,020 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-08-30 16:40:11,020 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-08-30 16:40:11,020 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-08-30 16:40:11,020 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-08-30 16:40:11,020 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-08-30 16:40:11,021 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-08-30 16:40:11,021 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-08-30 16:40:11,021 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-08-30 16:40:11,021 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-08-30 16:40:11,021 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-08-30 16:40:11,021 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-08-30 16:40:11,021 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-08-30 16:40:11,021 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-08-30 16:40:11,021 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2021-08-30 16:40:11,022 INFO L130 BoogieDeclarations]: Found specification of procedure strlen_rec [2021-08-30 16:40:11,022 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-08-30 16:40:11,022 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-08-30 16:40:11,022 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-30 16:40:11,022 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-08-30 16:40:11,022 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-08-30 16:40:11,022 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-08-30 16:40:11,022 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-30 16:40:11,227 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-30 16:40:11,227 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-08-30 16:40:11,230 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 04:40:11 BoogieIcfgContainer [2021-08-30 16:40:11,230 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-30 16:40:11,231 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-30 16:40:11,231 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-30 16:40:11,237 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-30 16:40:11,237 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 04:40:10" (1/3) ... [2021-08-30 16:40:11,238 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c63ec25 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 04:40:11, skipping insertion in model container [2021-08-30 16:40:11,238 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:40:10" (2/3) ... [2021-08-30 16:40:11,238 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c63ec25 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 04:40:11, skipping insertion in model container [2021-08-30 16:40:11,238 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 04:40:11" (3/3) ... [2021-08-30 16:40:11,239 INFO L111 eAbstractionObserver]: Analyzing ICFG rec_strlen-alloca-1.i [2021-08-30 16:40:11,242 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-30 16:40:11,242 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 7 error locations. [2021-08-30 16:40:11,278 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-30 16:40:11,285 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-08-30 16:40:11,285 INFO L340 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2021-08-30 16:40:11,305 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 25 states have internal predecessors, (29), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-08-30 16:40:11,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-08-30 16:40:11,312 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:40:11,313 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:40:11,313 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr2REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 2 more)] === [2021-08-30 16:40:11,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:40:11,327 INFO L82 PathProgramCache]: Analyzing trace with hash -2117754822, now seen corresponding path program 1 times [2021-08-30 16:40:11,333 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:40:11,333 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816057399] [2021-08-30 16:40:11,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:40:11,334 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:40:11,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:40:11,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:40:11,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:40:11,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:40:11,479 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:40:11,480 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816057399] [2021-08-30 16:40:11,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816057399] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 16:40:11,480 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 16:40:11,480 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-30 16:40:11,481 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143976844] [2021-08-30 16:40:11,484 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-30 16:40:11,484 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:40:11,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-30 16:40:11,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-30 16:40:11,501 INFO L87 Difference]: Start difference. First operand has 33 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 25 states have internal predecessors, (29), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:40:11,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:40:11,617 INFO L93 Difference]: Finished difference Result 31 states and 34 transitions. [2021-08-30 16:40:11,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-30 16:40:11,620 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2021-08-30 16:40:11,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:40:11,625 INFO L225 Difference]: With dead ends: 31 [2021-08-30 16:40:11,625 INFO L226 Difference]: Without dead ends: 28 [2021-08-30 16:40:11,626 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.19ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-30 16:40:11,629 INFO L928 BasicCegarLoop]: 6 mSDtfsCounter, 18 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 83.34ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.64ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 98.55ms IncrementalHoareTripleChecker+Time [2021-08-30 16:40:11,630 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 10 Invalid, 70 Unknown, 0 Unchecked, 2.64ms Time], IncrementalHoareTripleChecker [5 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 98.55ms Time] [2021-08-30 16:40:11,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-08-30 16:40:11,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-08-30 16:40:11,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 17 states have (on average 1.411764705882353) internal successors, (24), 21 states have internal predecessors, (24), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-30 16:40:11,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2021-08-30 16:40:11,653 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 10 [2021-08-30 16:40:11,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:40:11,654 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2021-08-30 16:40:11,654 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:40:11,654 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2021-08-30 16:40:11,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-08-30 16:40:11,655 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:40:11,655 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:40:11,655 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-30 16:40:11,655 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 2 more)] === [2021-08-30 16:40:11,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:40:11,657 INFO L82 PathProgramCache]: Analyzing trace with hash -2117754821, now seen corresponding path program 1 times [2021-08-30 16:40:11,657 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:40:11,657 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980469434] [2021-08-30 16:40:11,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:40:11,658 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:40:11,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:40:11,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:40:11,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:40:11,757 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:40:11,757 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:40:11,757 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980469434] [2021-08-30 16:40:11,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980469434] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 16:40:11,758 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 16:40:11,758 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-30 16:40:11,758 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228814255] [2021-08-30 16:40:11,760 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-30 16:40:11,760 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:40:11,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-30 16:40:11,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-30 16:40:11,761 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:40:11,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:40:11,831 INFO L93 Difference]: Finished difference Result 27 states and 30 transitions. [2021-08-30 16:40:11,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-30 16:40:11,831 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2021-08-30 16:40:11,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:40:11,833 INFO L225 Difference]: With dead ends: 27 [2021-08-30 16:40:11,833 INFO L226 Difference]: Without dead ends: 27 [2021-08-30 16:40:11,833 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 22.94ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-08-30 16:40:11,837 INFO L928 BasicCegarLoop]: 6 mSDtfsCounter, 28 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 41.22ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.22ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 50.76ms IncrementalHoareTripleChecker+Time [2021-08-30 16:40:11,838 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 12 Invalid, 57 Unknown, 0 Unchecked, 2.22ms Time], IncrementalHoareTripleChecker [6 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 50.76ms Time] [2021-08-30 16:40:11,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-08-30 16:40:11,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-08-30 16:40:11,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 20 states have internal predecessors, (23), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-30 16:40:11,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2021-08-30 16:40:11,848 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 10 [2021-08-30 16:40:11,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:40:11,848 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2021-08-30 16:40:11,848 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:40:11,849 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2021-08-30 16:40:11,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-08-30 16:40:11,849 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:40:11,849 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:40:11,849 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-30 16:40:11,850 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 2 more)] === [2021-08-30 16:40:11,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:40:11,851 INFO L82 PathProgramCache]: Analyzing trace with hash -2117754768, now seen corresponding path program 1 times [2021-08-30 16:40:11,851 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:40:11,851 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111419762] [2021-08-30 16:40:11,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:40:11,851 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:40:11,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:40:11,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:40:11,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:40:11,933 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:40:11,933 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:40:11,933 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111419762] [2021-08-30 16:40:11,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111419762] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 16:40:11,933 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 16:40:11,933 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-30 16:40:11,933 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913068380] [2021-08-30 16:40:11,934 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-30 16:40:11,934 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:40:11,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-30 16:40:11,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-30 16:40:11,934 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:40:12,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:40:12,006 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2021-08-30 16:40:12,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-30 16:40:12,007 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2021-08-30 16:40:12,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:40:12,009 INFO L225 Difference]: With dead ends: 34 [2021-08-30 16:40:12,009 INFO L226 Difference]: Without dead ends: 34 [2021-08-30 16:40:12,014 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 18.24ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-08-30 16:40:12,017 INFO L928 BasicCegarLoop]: 7 mSDtfsCounter, 19 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 45.86ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.54ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 55.20ms IncrementalHoareTripleChecker+Time [2021-08-30 16:40:12,017 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 14 Invalid, 68 Unknown, 0 Unchecked, 2.54ms Time], IncrementalHoareTripleChecker [6 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 55.20ms Time] [2021-08-30 16:40:12,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-08-30 16:40:12,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 29. [2021-08-30 16:40:12,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 22 states have internal predecessors, (25), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-30 16:40:12,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2021-08-30 16:40:12,021 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 10 [2021-08-30 16:40:12,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:40:12,021 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2021-08-30 16:40:12,021 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:40:12,022 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2021-08-30 16:40:12,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-08-30 16:40:12,022 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:40:12,022 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:40:12,022 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-30 16:40:12,022 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 2 more)] === [2021-08-30 16:40:12,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:40:12,022 INFO L82 PathProgramCache]: Analyzing trace with hash -2117695186, now seen corresponding path program 1 times [2021-08-30 16:40:12,023 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:40:12,023 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589095909] [2021-08-30 16:40:12,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:40:12,023 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:40:12,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:40:12,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:40:12,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:40:12,091 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:40:12,091 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:40:12,091 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589095909] [2021-08-30 16:40:12,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589095909] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 16:40:12,092 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 16:40:12,092 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-30 16:40:12,092 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090631702] [2021-08-30 16:40:12,092 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-30 16:40:12,093 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:40:12,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-30 16:40:12,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-08-30 16:40:12,094 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand has 6 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:40:12,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:40:12,163 INFO L93 Difference]: Finished difference Result 38 states and 42 transitions. [2021-08-30 16:40:12,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-30 16:40:12,164 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2021-08-30 16:40:12,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:40:12,164 INFO L225 Difference]: With dead ends: 38 [2021-08-30 16:40:12,164 INFO L226 Difference]: Without dead ends: 38 [2021-08-30 16:40:12,165 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 35.59ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-30 16:40:12,165 INFO L928 BasicCegarLoop]: 7 mSDtfsCounter, 34 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 44.38ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.42ms SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 55.96ms IncrementalHoareTripleChecker+Time [2021-08-30 16:40:12,166 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 18 Invalid, 95 Unknown, 0 Unchecked, 1.42ms Time], IncrementalHoareTripleChecker [9 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 55.96ms Time] [2021-08-30 16:40:12,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-08-30 16:40:12,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 31. [2021-08-30 16:40:12,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 24 states have internal predecessors, (28), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-30 16:40:12,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2021-08-30 16:40:12,169 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 10 [2021-08-30 16:40:12,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:40:12,169 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2021-08-30 16:40:12,169 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:40:12,169 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2021-08-30 16:40:12,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-30 16:40:12,170 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:40:12,170 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:40:12,170 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-30 16:40:12,170 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting strlen_recErr0REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 2 more)] === [2021-08-30 16:40:12,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:40:12,171 INFO L82 PathProgramCache]: Analyzing trace with hash -1259263901, now seen corresponding path program 1 times [2021-08-30 16:40:12,171 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:40:12,171 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240109040] [2021-08-30 16:40:12,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:40:12,171 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:40:12,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:40:12,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:40:12,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:40:12,206 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:40:12,206 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:40:12,206 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240109040] [2021-08-30 16:40:12,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240109040] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 16:40:12,207 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 16:40:12,207 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-30 16:40:12,207 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129887552] [2021-08-30 16:40:12,207 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-30 16:40:12,207 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:40:12,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-30 16:40:12,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-30 16:40:12,208 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand has 6 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:40:12,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:40:12,266 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2021-08-30 16:40:12,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-30 16:40:12,266 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2021-08-30 16:40:12,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:40:12,266 INFO L225 Difference]: With dead ends: 30 [2021-08-30 16:40:12,266 INFO L226 Difference]: Without dead ends: 30 [2021-08-30 16:40:12,267 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.42ms TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-08-30 16:40:12,267 INFO L928 BasicCegarLoop]: 5 mSDtfsCounter, 29 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 31.14ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.90ms SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 41.95ms IncrementalHoareTripleChecker+Time [2021-08-30 16:40:12,267 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 15 Invalid, 96 Unknown, 0 Unchecked, 0.90ms Time], IncrementalHoareTripleChecker [8 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 41.95ms Time] [2021-08-30 16:40:12,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-08-30 16:40:12,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-08-30 16:40:12,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 23 states have internal predecessors, (27), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-30 16:40:12,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2021-08-30 16:40:12,270 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 13 [2021-08-30 16:40:12,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:40:12,270 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2021-08-30 16:40:12,270 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:40:12,270 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2021-08-30 16:40:12,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-30 16:40:12,270 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:40:12,271 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:40:12,271 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-08-30 16:40:12,271 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting strlen_recErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 2 more)] === [2021-08-30 16:40:12,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:40:12,271 INFO L82 PathProgramCache]: Analyzing trace with hash -1259263900, now seen corresponding path program 1 times [2021-08-30 16:40:12,271 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:40:12,271 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712999721] [2021-08-30 16:40:12,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:40:12,271 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:40:12,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:40:12,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:40:12,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:40:12,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:40:12,348 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:40:12,348 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712999721] [2021-08-30 16:40:12,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712999721] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 16:40:12,348 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 16:40:12,348 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-30 16:40:12,349 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081308269] [2021-08-30 16:40:12,349 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-30 16:40:12,349 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:40:12,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-30 16:40:12,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-08-30 16:40:12,350 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 8 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:40:12,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:40:12,436 INFO L93 Difference]: Finished difference Result 37 states and 42 transitions. [2021-08-30 16:40:12,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-30 16:40:12,437 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2021-08-30 16:40:12,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:40:12,437 INFO L225 Difference]: With dead ends: 37 [2021-08-30 16:40:12,437 INFO L226 Difference]: Without dead ends: 37 [2021-08-30 16:40:12,437 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 49.27ms TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-08-30 16:40:12,438 INFO L928 BasicCegarLoop]: 5 mSDtfsCounter, 45 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 46.92ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.08ms SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 57.10ms IncrementalHoareTripleChecker+Time [2021-08-30 16:40:12,438 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 19 Invalid, 131 Unknown, 0 Unchecked, 1.08ms Time], IncrementalHoareTripleChecker [11 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 57.10ms Time] [2021-08-30 16:40:12,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-08-30 16:40:12,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-08-30 16:40:12,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 28 states have internal predecessors, (33), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-08-30 16:40:12,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2021-08-30 16:40:12,441 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 13 [2021-08-30 16:40:12,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:40:12,441 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2021-08-30 16:40:12,441 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:40:12,441 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2021-08-30 16:40:12,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-30 16:40:12,442 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:40:12,442 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:40:12,442 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-08-30 16:40:12,442 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 2 more)] === [2021-08-30 16:40:12,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:40:12,442 INFO L82 PathProgramCache]: Analyzing trace with hash -1143813903, now seen corresponding path program 1 times [2021-08-30 16:40:12,442 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:40:12,442 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390595725] [2021-08-30 16:40:12,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:40:12,442 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:40:12,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:40:12,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:40:12,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:40:12,532 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:40:12,532 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:40:12,532 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390595725] [2021-08-30 16:40:12,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390595725] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:40:12,532 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908220187] [2021-08-30 16:40:12,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:40:12,533 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:40:12,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:40:12,537 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-30 16:40:12,567 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-30 16:40:12,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:40:12,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-30 16:40:12,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:40:12,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-30 16:40:12,767 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:40:12,768 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:40:12,918 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:40:12,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1908220187] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 16:40:12,919 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 16:40:12,919 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 9 [2021-08-30 16:40:12,919 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738188481] [2021-08-30 16:40:12,920 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-30 16:40:12,920 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:40:12,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-30 16:40:12,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-08-30 16:40:12,921 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:40:13,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:40:13,052 INFO L93 Difference]: Finished difference Result 49 states and 55 transitions. [2021-08-30 16:40:13,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-30 16:40:13,053 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2021-08-30 16:40:13,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:40:13,055 INFO L225 Difference]: With dead ends: 49 [2021-08-30 16:40:13,055 INFO L226 Difference]: Without dead ends: 49 [2021-08-30 16:40:13,055 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 91.15ms TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-08-30 16:40:13,056 INFO L928 BasicCegarLoop]: 10 mSDtfsCounter, 42 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 73.67ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.62ms SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 88.57ms IncrementalHoareTripleChecker+Time [2021-08-30 16:40:13,056 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 27 Invalid, 188 Unknown, 0 Unchecked, 1.62ms Time], IncrementalHoareTripleChecker [16 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 88.57ms Time] [2021-08-30 16:40:13,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-08-30 16:40:13,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 34. [2021-08-30 16:40:13,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 25 states have internal predecessors, (29), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-08-30 16:40:13,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2021-08-30 16:40:13,060 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 14 [2021-08-30 16:40:13,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:40:13,060 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2021-08-30 16:40:13,060 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:40:13,060 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2021-08-30 16:40:13,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-30 16:40:13,061 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:40:13,061 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:40:13,080 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-08-30 16:40:13,276 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:40:13,277 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting strlen_recErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 2 more)] === [2021-08-30 16:40:13,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:40:13,277 INFO L82 PathProgramCache]: Analyzing trace with hash 228211982, now seen corresponding path program 1 times [2021-08-30 16:40:13,278 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:40:13,278 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335157023] [2021-08-30 16:40:13,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:40:13,278 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:40:13,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:40:13,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:40:13,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:40:13,369 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:40:13,370 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:40:13,370 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335157023] [2021-08-30 16:40:13,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335157023] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 16:40:13,370 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 16:40:13,370 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-08-30 16:40:13,370 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906436456] [2021-08-30 16:40:13,370 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-30 16:40:13,370 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:40:13,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-30 16:40:13,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-08-30 16:40:13,371 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand has 9 states, 8 states have (on average 1.5) internal successors, (12), 7 states have internal predecessors, (12), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:40:13,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:40:13,498 INFO L93 Difference]: Finished difference Result 44 states and 47 transitions. [2021-08-30 16:40:13,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-30 16:40:13,498 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.5) internal successors, (12), 7 states have internal predecessors, (12), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2021-08-30 16:40:13,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:40:13,499 INFO L225 Difference]: With dead ends: 44 [2021-08-30 16:40:13,499 INFO L226 Difference]: Without dead ends: 44 [2021-08-30 16:40:13,499 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 65.15ms TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-08-30 16:40:13,500 INFO L928 BasicCegarLoop]: 6 mSDtfsCounter, 24 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 67.84ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.15ms SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 82.70ms IncrementalHoareTripleChecker+Time [2021-08-30 16:40:13,500 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 39 Invalid, 184 Unknown, 0 Unchecked, 1.15ms Time], IncrementalHoareTripleChecker [10 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 82.70ms Time] [2021-08-30 16:40:13,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-08-30 16:40:13,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 41. [2021-08-30 16:40:13,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 31 states have internal predecessors, (34), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-08-30 16:40:13,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2021-08-30 16:40:13,503 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 17 [2021-08-30 16:40:13,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:40:13,503 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2021-08-30 16:40:13,503 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.5) internal successors, (12), 7 states have internal predecessors, (12), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:40:13,503 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2021-08-30 16:40:13,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-30 16:40:13,504 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:40:13,504 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:40:13,504 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-08-30 16:40:13,504 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting strlen_recErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 2 more)] === [2021-08-30 16:40:13,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:40:13,504 INFO L82 PathProgramCache]: Analyzing trace with hash 929276560, now seen corresponding path program 1 times [2021-08-30 16:40:13,504 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:40:13,504 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660713107] [2021-08-30 16:40:13,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:40:13,504 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:40:13,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:40:13,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:40:13,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:40:13,603 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:40:13,603 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:40:13,603 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660713107] [2021-08-30 16:40:13,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660713107] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 16:40:13,603 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 16:40:13,603 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-08-30 16:40:13,603 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853917154] [2021-08-30 16:40:13,604 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-30 16:40:13,604 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:40:13,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-30 16:40:13,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-08-30 16:40:13,604 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 8 states have internal predecessors, (12), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:40:13,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:40:13,745 INFO L93 Difference]: Finished difference Result 55 states and 59 transitions. [2021-08-30 16:40:13,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-30 16:40:13,745 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 8 states have internal predecessors, (12), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2021-08-30 16:40:13,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:40:13,746 INFO L225 Difference]: With dead ends: 55 [2021-08-30 16:40:13,747 INFO L226 Difference]: Without dead ends: 55 [2021-08-30 16:40:13,747 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 84.60ms TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-08-30 16:40:13,747 INFO L928 BasicCegarLoop]: 6 mSDtfsCounter, 42 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 73.79ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.22ms SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 87.77ms IncrementalHoareTripleChecker+Time [2021-08-30 16:40:13,747 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 32 Invalid, 178 Unknown, 0 Unchecked, 1.22ms Time], IncrementalHoareTripleChecker [13 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 87.77ms Time] [2021-08-30 16:40:13,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-08-30 16:40:13,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 42. [2021-08-30 16:40:13,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 30 states have (on average 1.2) internal successors, (36), 32 states have internal predecessors, (36), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-08-30 16:40:13,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2021-08-30 16:40:13,750 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 17 [2021-08-30 16:40:13,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:40:13,750 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2021-08-30 16:40:13,750 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 8 states have internal predecessors, (12), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:40:13,750 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2021-08-30 16:40:13,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-30 16:40:13,751 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:40:13,751 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:40:13,751 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-08-30 16:40:13,751 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr4ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 2 more)] === [2021-08-30 16:40:13,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:40:13,751 INFO L82 PathProgramCache]: Analyzing trace with hash -1516451273, now seen corresponding path program 1 times [2021-08-30 16:40:13,751 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:40:13,751 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569830068] [2021-08-30 16:40:13,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:40:13,752 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:40:13,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:40:13,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:40:13,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:40:13,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-08-30 16:40:13,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:40:13,791 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:40:13,791 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:40:13,791 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569830068] [2021-08-30 16:40:13,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569830068] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 16:40:13,791 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 16:40:13,791 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-30 16:40:13,791 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627489419] [2021-08-30 16:40:13,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-30 16:40:13,791 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:40:13,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-30 16:40:13,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-30 16:40:13,792 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-30 16:40:13,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:40:13,846 INFO L93 Difference]: Finished difference Result 41 states and 46 transitions. [2021-08-30 16:40:13,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-30 16:40:13,846 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2021-08-30 16:40:13,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:40:13,847 INFO L225 Difference]: With dead ends: 41 [2021-08-30 16:40:13,847 INFO L226 Difference]: Without dead ends: 24 [2021-08-30 16:40:13,847 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.36ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-30 16:40:13,847 INFO L928 BasicCegarLoop]: 5 mSDtfsCounter, 14 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 44.15ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.43ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 51.31ms IncrementalHoareTripleChecker+Time [2021-08-30 16:40:13,848 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 8 Invalid, 65 Unknown, 0 Unchecked, 0.43ms Time], IncrementalHoareTripleChecker [5 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 51.31ms Time] [2021-08-30 16:40:13,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-08-30 16:40:13,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2021-08-30 16:40:13,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 16 states have (on average 1.125) internal successors, (18), 16 states have internal predecessors, (18), 4 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:40:13,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2021-08-30 16:40:13,865 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 18 [2021-08-30 16:40:13,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:40:13,865 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2021-08-30 16:40:13,866 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-30 16:40:13,866 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2021-08-30 16:40:13,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-30 16:40:13,866 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:40:13,866 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:40:13,866 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-08-30 16:40:13,867 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting strlen_recErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 2 more)] === [2021-08-30 16:40:13,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:40:13,867 INFO L82 PathProgramCache]: Analyzing trace with hash 1650962797, now seen corresponding path program 1 times [2021-08-30 16:40:13,867 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:40:13,867 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641213465] [2021-08-30 16:40:13,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:40:13,867 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:40:13,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:40:13,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:40:13,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:40:13,973 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:40:13,973 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:40:13,973 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641213465] [2021-08-30 16:40:13,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641213465] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:40:13,973 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39384062] [2021-08-30 16:40:13,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:40:13,974 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:40:13,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:40:13,977 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-30 16:40:13,989 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-30 16:40:14,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:40:14,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-30 16:40:14,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:40:14,177 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:40:14,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:40:14,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-08-30 16:40:14,338 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:40:14,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [39384062] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 16:40:14,339 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 16:40:14,339 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2021-08-30 16:40:14,339 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553476005] [2021-08-30 16:40:14,339 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-30 16:40:14,340 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:40:14,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-30 16:40:14,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2021-08-30 16:40:14,346 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand has 23 states, 19 states have (on average 1.736842105263158) internal successors, (33), 17 states have internal predecessors, (33), 7 states have call successors, (9), 7 states have call predecessors, (9), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:40:14,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:40:14,522 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2021-08-30 16:40:14,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-30 16:40:14,523 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 19 states have (on average 1.736842105263158) internal successors, (33), 17 states have internal predecessors, (33), 7 states have call successors, (9), 7 states have call predecessors, (9), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2021-08-30 16:40:14,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:40:14,523 INFO L225 Difference]: With dead ends: 31 [2021-08-30 16:40:14,523 INFO L226 Difference]: Without dead ends: 31 [2021-08-30 16:40:14,524 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 259.69ms TimeCoverageRelationStatistics Valid=125, Invalid=687, Unknown=0, NotChecked=0, Total=812 [2021-08-30 16:40:14,524 INFO L928 BasicCegarLoop]: 6 mSDtfsCounter, 57 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 79.54ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.34ms SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 96.79ms IncrementalHoareTripleChecker+Time [2021-08-30 16:40:14,524 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 48 Invalid, 276 Unknown, 0 Unchecked, 1.34ms Time], IncrementalHoareTripleChecker [18 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 96.79ms Time] [2021-08-30 16:40:14,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-08-30 16:40:14,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 26. [2021-08-30 16:40:14,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 19 states have (on average 1.105263157894737) internal successors, (21), 19 states have internal predecessors, (21), 5 states have call successors, (5), 5 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:40:14,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2021-08-30 16:40:14,526 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 21 [2021-08-30 16:40:14,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:40:14,526 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2021-08-30 16:40:14,526 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 19 states have (on average 1.736842105263158) internal successors, (33), 17 states have internal predecessors, (33), 7 states have call successors, (9), 7 states have call predecessors, (9), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:40:14,527 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2021-08-30 16:40:14,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-30 16:40:14,527 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:40:14,527 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:40:14,546 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-30 16:40:14,728 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-08-30 16:40:14,729 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting strlen_recErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 2 more)] === [2021-08-30 16:40:14,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:40:14,729 INFO L82 PathProgramCache]: Analyzing trace with hash -1692198505, now seen corresponding path program 2 times [2021-08-30 16:40:14,729 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:40:14,729 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166534324] [2021-08-30 16:40:14,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:40:14,730 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:40:14,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:40:14,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:40:14,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:40:14,889 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:40:14,889 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:40:14,889 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166534324] [2021-08-30 16:40:14,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166534324] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:40:14,889 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077088754] [2021-08-30 16:40:14,889 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-30 16:40:14,889 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:40:14,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:40:14,890 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-30 16:40:14,891 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-30 16:40:14,960 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-30 16:40:14,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-30 16:40:14,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-30 16:40:14,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:40:15,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-08-30 16:40:15,353 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-30 16:40:15,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 33 [2021-08-30 16:40:15,468 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:40:15,468 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:40:15,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 34 [2021-08-30 16:40:15,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2021-08-30 16:40:15,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 35 [2021-08-30 16:40:15,918 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:40:15,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2077088754] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 16:40:15,918 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 16:40:15,918 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 35 [2021-08-30 16:40:15,918 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330944498] [2021-08-30 16:40:15,919 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-08-30 16:40:15,919 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:40:15,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-08-30 16:40:15,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1082, Unknown=0, NotChecked=0, Total=1190 [2021-08-30 16:40:15,919 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand has 35 states, 30 states have (on average 1.4666666666666666) internal successors, (44), 26 states have internal predecessors, (44), 10 states have call successors, (12), 11 states have call predecessors, (12), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:40:16,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:40:16,445 INFO L93 Difference]: Finished difference Result 48 states and 49 transitions. [2021-08-30 16:40:16,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-30 16:40:16,446 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 30 states have (on average 1.4666666666666666) internal successors, (44), 26 states have internal predecessors, (44), 10 states have call successors, (12), 11 states have call predecessors, (12), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2021-08-30 16:40:16,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:40:16,446 INFO L225 Difference]: With dead ends: 48 [2021-08-30 16:40:16,446 INFO L226 Difference]: Without dead ends: 39 [2021-08-30 16:40:16,447 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 942.41ms TimeCoverageRelationStatistics Valid=212, Invalid=2140, Unknown=0, NotChecked=0, Total=2352 [2021-08-30 16:40:16,447 INFO L928 BasicCegarLoop]: 7 mSDtfsCounter, 40 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 102.64ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.27ms SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 133 IncrementalHoareTripleChecker+Unchecked, 132.45ms IncrementalHoareTripleChecker+Time [2021-08-30 16:40:16,448 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 79 Invalid, 444 Unknown, 0 Unchecked, 2.27ms Time], IncrementalHoareTripleChecker [13 Valid, 298 Invalid, 0 Unknown, 133 Unchecked, 132.45ms Time] [2021-08-30 16:40:16,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-08-30 16:40:16,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 34. [2021-08-30 16:40:16,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 26 states have (on average 1.0769230769230769) internal successors, (28), 26 states have internal predecessors, (28), 6 states have call successors, (6), 6 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:40:16,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2021-08-30 16:40:16,449 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 25 [2021-08-30 16:40:16,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:40:16,449 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2021-08-30 16:40:16,450 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 30 states have (on average 1.4666666666666666) internal successors, (44), 26 states have internal predecessors, (44), 10 states have call successors, (12), 11 states have call predecessors, (12), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:40:16,450 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2021-08-30 16:40:16,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-30 16:40:16,450 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:40:16,450 INFO L513 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:40:16,469 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-08-30 16:40:16,656 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:40:16,657 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting strlen_recErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 2 more)] === [2021-08-30 16:40:16,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:40:16,657 INFO L82 PathProgramCache]: Analyzing trace with hash -1867118562, now seen corresponding path program 3 times [2021-08-30 16:40:16,657 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:40:16,657 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316568534] [2021-08-30 16:40:16,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:40:16,658 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:40:16,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:40:16,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:40:16,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:40:16,830 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:40:16,830 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:40:16,830 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316568534] [2021-08-30 16:40:16,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316568534] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:40:16,831 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458212638] [2021-08-30 16:40:16,831 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-30 16:40:16,831 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:40:16,831 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:40:16,831 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-30 16:40:16,832 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-08-30 16:40:16,911 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-30 16:40:16,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-30 16:40:16,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-30 16:40:16,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:40:16,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-30 16:40:16,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-08-30 16:40:17,044 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-30 16:40:17,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-08-30 16:40:17,167 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-08-30 16:40:17,167 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:40:17,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 29 [2021-08-30 16:40:17,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 35 [2021-08-30 16:40:17,679 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-08-30 16:40:17,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1458212638] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 16:40:17,680 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 16:40:17,680 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9, 9] total 32 [2021-08-30 16:40:17,680 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381614520] [2021-08-30 16:40:17,680 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-08-30 16:40:17,680 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:40:17,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-08-30 16:40:17,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=916, Unknown=0, NotChecked=0, Total=992 [2021-08-30 16:40:17,681 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand has 32 states, 27 states have (on average 2.037037037037037) internal successors, (55), 24 states have internal predecessors, (55), 11 states have call successors, (13), 10 states have call predecessors, (13), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:40:18,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:40:18,614 INFO L93 Difference]: Finished difference Result 53 states and 54 transitions. [2021-08-30 16:40:18,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-30 16:40:18,615 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 27 states have (on average 2.037037037037037) internal successors, (55), 24 states have internal predecessors, (55), 11 states have call successors, (13), 10 states have call predecessors, (13), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2021-08-30 16:40:18,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:40:18,615 INFO L225 Difference]: With dead ends: 53 [2021-08-30 16:40:18,615 INFO L226 Difference]: Without dead ends: 0 [2021-08-30 16:40:18,615 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 1138.16ms TimeCoverageRelationStatistics Valid=388, Invalid=2918, Unknown=0, NotChecked=0, Total=3306 [2021-08-30 16:40:18,616 INFO L928 BasicCegarLoop]: 6 mSDtfsCounter, 52 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 537 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 178.71ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 637 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.51ms SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 537 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 78 IncrementalHoareTripleChecker+Unchecked, 211.63ms IncrementalHoareTripleChecker+Time [2021-08-30 16:40:18,616 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 88 Invalid, 637 Unknown, 0 Unchecked, 2.51ms Time], IncrementalHoareTripleChecker [22 Valid, 537 Invalid, 0 Unknown, 78 Unchecked, 211.63ms Time] [2021-08-30 16:40:18,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-08-30 16:40:18,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-08-30 16:40:18,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-30 16:40:18,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-08-30 16:40:18,617 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 33 [2021-08-30 16:40:18,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:40:18,617 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-30 16:40:18,617 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 27 states have (on average 2.037037037037037) internal successors, (55), 24 states have internal predecessors, (55), 11 states have call successors, (13), 10 states have call predecessors, (13), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:40:18,617 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-08-30 16:40:18,617 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-08-30 16:40:18,619 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr0REQUIRES_VIOLATION (6 of 7 remaining) [2021-08-30 16:40:18,619 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr1REQUIRES_VIOLATION (5 of 7 remaining) [2021-08-30 16:40:18,619 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr2REQUIRES_VIOLATION (4 of 7 remaining) [2021-08-30 16:40:18,620 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr3REQUIRES_VIOLATION (3 of 7 remaining) [2021-08-30 16:40:18,620 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr4ENSURES_VIOLATIONMEMORY_LEAK (2 of 7 remaining) [2021-08-30 16:40:18,620 INFO L764 garLoopResultBuilder]: Registering result SAFE for location strlen_recErr0REQUIRES_VIOLATION (1 of 7 remaining) [2021-08-30 16:40:18,620 INFO L764 garLoopResultBuilder]: Registering result SAFE for location strlen_recErr1REQUIRES_VIOLATION (0 of 7 remaining) [2021-08-30 16:40:18,636 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-08-30 16:40:18,832 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:40:18,836 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-30 16:40:18,838 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.08 04:40:18 BoogieIcfgContainer [2021-08-30 16:40:18,838 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-30 16:40:18,839 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-30 16:40:18,839 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-30 16:40:18,839 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-30 16:40:18,839 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 04:40:11" (3/4) ... [2021-08-30 16:40:18,840 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-08-30 16:40:18,844 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2021-08-30 16:40:18,844 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __bswap_32 [2021-08-30 16:40:18,844 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __bswap_64 [2021-08-30 16:40:18,844 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __uint16_identity [2021-08-30 16:40:18,844 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __uint64_identity [2021-08-30 16:40:18,845 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2021-08-30 16:40:18,845 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure strlen_rec [2021-08-30 16:40:18,845 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __uint32_identity [2021-08-30 16:40:18,848 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 12 nodes and edges [2021-08-30 16:40:18,849 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-08-30 16:40:18,849 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-08-30 16:40:18,849 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-08-30 16:40:18,870 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-08-30 16:40:18,870 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-30 16:40:18,870 INFO L158 Benchmark]: Toolchain (without parser) took 8247.32ms. Allocated memory was 48.2MB in the beginning and 86.0MB in the end (delta: 37.7MB). Free memory was 22.7MB in the beginning and 40.0MB in the end (delta: -17.4MB). Peak memory consumption was 19.8MB. Max. memory is 16.1GB. [2021-08-30 16:40:18,871 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 48.2MB. Free memory was 30.4MB in the beginning and 30.3MB in the end (delta: 31.8kB). There was no memory consumed. Max. memory is 16.1GB. [2021-08-30 16:40:18,871 INFO L158 Benchmark]: CACSL2BoogieTranslator took 285.78ms. Allocated memory is still 48.2MB. Free memory was 22.5MB in the beginning and 26.0MB in the end (delta: -3.6MB). Peak memory consumption was 3.7MB. Max. memory is 16.1GB. [2021-08-30 16:40:18,873 INFO L158 Benchmark]: Boogie Preprocessor took 44.24ms. Allocated memory is still 48.2MB. Free memory was 26.0MB in the beginning and 23.8MB in the end (delta: 2.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-08-30 16:40:18,873 INFO L158 Benchmark]: RCFGBuilder took 273.29ms. Allocated memory is still 48.2MB. Free memory was 23.7MB in the beginning and 25.9MB in the end (delta: -2.2MB). Peak memory consumption was 8.6MB. Max. memory is 16.1GB. [2021-08-30 16:40:18,873 INFO L158 Benchmark]: TraceAbstraction took 7607.05ms. Allocated memory was 48.2MB in the beginning and 86.0MB in the end (delta: 37.7MB). Free memory was 25.5MB in the beginning and 42.5MB in the end (delta: -17.0MB). Peak memory consumption was 21.1MB. Max. memory is 16.1GB. [2021-08-30 16:40:18,874 INFO L158 Benchmark]: Witness Printer took 31.61ms. Allocated memory is still 86.0MB. Free memory was 42.5MB in the beginning and 40.0MB in the end (delta: 2.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-08-30 16:40:18,875 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 48.2MB. Free memory was 30.4MB in the beginning and 30.3MB in the end (delta: 31.8kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 285.78ms. Allocated memory is still 48.2MB. Free memory was 22.5MB in the beginning and 26.0MB in the end (delta: -3.6MB). Peak memory consumption was 3.7MB. Max. memory is 16.1GB. * Boogie Preprocessor took 44.24ms. Allocated memory is still 48.2MB. Free memory was 26.0MB in the beginning and 23.8MB in the end (delta: 2.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 273.29ms. Allocated memory is still 48.2MB. Free memory was 23.7MB in the beginning and 25.9MB in the end (delta: -2.2MB). Peak memory consumption was 8.6MB. Max. memory is 16.1GB. * TraceAbstraction took 7607.05ms. Allocated memory was 48.2MB in the beginning and 86.0MB in the end (delta: 37.7MB). Free memory was 25.5MB in the beginning and 42.5MB in the end (delta: -17.0MB). Peak memory consumption was 21.1MB. Max. memory is 16.1GB. * Witness Printer took 31.61ms. Allocated memory is still 86.0MB. Free memory was 42.5MB in the beginning and 40.0MB in the end (delta: 2.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.00ms ErrorAutomatonConstructionTimeTotal, 0.00ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.00ms ErrorAutomatonConstructionTimeAvg, 0.00ms ErrorAutomatonDifferenceTimeAvg, 0.00ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 529]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 529]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 532]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 532]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 520]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 515]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 515]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 9 procedures, 48 locations, 7 error locations. Started 1 CEGAR loops. OverallTime: 7558.76ms, OverallIterations: 13, TraceHistogramMax: 4, EmptinessCheckTime: 17.86ms, AutomataDifference: 2650.60ms, DeadEndRemovalTime: 0.00ms, HoareAnnotationTime: 0.00ms, InitialAbstractionConstructionTime: 14.17ms, PartialOrderReductionTime: 0.00ms, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 462 SdHoareTripleChecker+Valid, 1110.74ms IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 444 mSDsluCounter, 409 SdHoareTripleChecker+Invalid, 913.19ms Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 211 IncrementalHoareTripleChecker+Unchecked, 598 mSDsCounter, 142 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2136 IncrementalHoareTripleChecker+Invalid, 2489 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 142 mSolverCounterUnsat, 82 mSDtfsCounter, 2136 mSolverCounterSat, 21.36ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 364 GetRequests, 159 SyntacticMatches, 6 SemanticMatches, 199 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 974 ImplicationChecksByTransitivity, 2750.18ms Time, 0.00ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=42occurred in iteration=9, InterpolantAutomatonStates: 131, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.00ms DumpTime, AutomataMinimizationStatistics: 62.10ms AutomataMinimizationTime, 13 MinimizatonAttempts, 55 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 31.93ms SsaConstructionTime, 162.13ms SatisfiabilityAnalysisTime, 3340.60ms InterpolantComputationTime, 304 NumberOfCodeBlocks, 304 NumberOfCodeBlocksAsserted, 21 NumberOfCheckSat, 376 ConstructedInterpolants, 20 QuantifiedInterpolants, 2941 SizeOfPredicates, 39 NumberOfNonLiveVariables, 400 ConjunctsInSsa, 99 ConjunctsInUnsatCore, 21 InterpolantComputations, 9 PerfectInterpolantSequences, 46/118 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 7 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-08-30 16:40:18,897 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...