./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/cstrlen-alloca-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 57096758 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afaf3b46-2340-4a26-971c-c4017b245533/bin/uautomizer-hJ6jxDFKc3/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afaf3b46-2340-4a26-971c-c4017b245533/bin/uautomizer-hJ6jxDFKc3/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afaf3b46-2340-4a26-971c-c4017b245533/bin/uautomizer-hJ6jxDFKc3/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afaf3b46-2340-4a26-971c-c4017b245533/bin/uautomizer-hJ6jxDFKc3/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/cstrlen-alloca-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afaf3b46-2340-4a26-971c-c4017b245533/bin/uautomizer-hJ6jxDFKc3/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afaf3b46-2340-4a26-971c-c4017b245533/bin/uautomizer-hJ6jxDFKc3 --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 a9da884533d6d47d95abcc742a22337ea753025b ......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-5709675 [2021-10-15 19:20:06,819 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-15 19:20:06,821 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-15 19:20:06,855 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-15 19:20:06,856 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-15 19:20:06,857 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-15 19:20:06,859 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-15 19:20:06,862 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-15 19:20:06,864 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-15 19:20:06,865 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-15 19:20:06,867 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-15 19:20:06,868 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-15 19:20:06,869 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-15 19:20:06,870 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-15 19:20:06,872 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-15 19:20:06,874 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-15 19:20:06,875 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-15 19:20:06,877 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-15 19:20:06,879 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-15 19:20:06,882 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-15 19:20:06,884 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-15 19:20:06,891 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-15 19:20:06,893 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-15 19:20:06,895 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-15 19:20:06,900 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-15 19:20:06,909 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-15 19:20:06,909 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-15 19:20:06,911 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-15 19:20:06,911 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-15 19:20:06,912 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-15 19:20:06,914 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-15 19:20:06,915 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-15 19:20:06,917 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-15 19:20:06,918 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-15 19:20:06,919 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-15 19:20:06,920 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-15 19:20:06,921 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-15 19:20:06,921 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-15 19:20:06,921 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-15 19:20:06,922 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-15 19:20:06,923 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-15 19:20:06,924 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afaf3b46-2340-4a26-971c-c4017b245533/bin/uautomizer-hJ6jxDFKc3/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-10-15 19:20:06,965 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-15 19:20:06,965 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-15 19:20:06,966 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-15 19:20:06,966 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-15 19:20:06,972 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-15 19:20:06,973 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-15 19:20:06,973 INFO L138 SettingsManager]: * Use SBE=true [2021-10-15 19:20:06,973 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-15 19:20:06,973 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-15 19:20:06,973 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-15 19:20:06,974 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-15 19:20:06,974 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-15 19:20:06,974 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-15 19:20:06,974 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-15 19:20:06,974 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-15 19:20:06,974 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-15 19:20:06,975 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-15 19:20:06,975 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-15 19:20:06,975 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-15 19:20:06,975 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-15 19:20:06,975 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-15 19:20:06,976 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-15 19:20:06,976 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-15 19:20:06,976 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 19:20:06,976 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-15 19:20:06,976 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-15 19:20:06,977 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-15 19:20:06,977 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-15 19:20:06,977 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-15 19:20:06,977 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:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afaf3b46-2340-4a26-971c-c4017b245533/bin/uautomizer-hJ6jxDFKc3/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afaf3b46-2340-4a26-971c-c4017b245533/bin/uautomizer-hJ6jxDFKc3 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a9da884533d6d47d95abcc742a22337ea753025b [2021-10-15 19:20:07,207 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-15 19:20:07,229 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-15 19:20:07,231 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-15 19:20:07,233 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-15 19:20:07,234 INFO L275 PluginConnector]: CDTParser initialized [2021-10-15 19:20:07,235 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afaf3b46-2340-4a26-971c-c4017b245533/bin/uautomizer-hJ6jxDFKc3/../../sv-benchmarks/c/array-memsafety/cstrlen-alloca-2.i [2021-10-15 19:20:07,336 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afaf3b46-2340-4a26-971c-c4017b245533/bin/uautomizer-hJ6jxDFKc3/data/d0373054a/8c8a17106c2d43cfa934c37a130fec4e/FLAGaa3b4d48d [2021-10-15 19:20:07,862 INFO L306 CDTParser]: Found 1 translation units. [2021-10-15 19:20:07,863 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afaf3b46-2340-4a26-971c-c4017b245533/sv-benchmarks/c/array-memsafety/cstrlen-alloca-2.i [2021-10-15 19:20:07,883 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afaf3b46-2340-4a26-971c-c4017b245533/bin/uautomizer-hJ6jxDFKc3/data/d0373054a/8c8a17106c2d43cfa934c37a130fec4e/FLAGaa3b4d48d [2021-10-15 19:20:08,208 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afaf3b46-2340-4a26-971c-c4017b245533/bin/uautomizer-hJ6jxDFKc3/data/d0373054a/8c8a17106c2d43cfa934c37a130fec4e [2021-10-15 19:20:08,210 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-15 19:20:08,211 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-10-15 19:20:08,225 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-15 19:20:08,226 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-15 19:20:08,228 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-15 19:20:08,229 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 07:20:08" (1/1) ... [2021-10-15 19:20:08,231 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d7ae035 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:20:08, skipping insertion in model container [2021-10-15 19:20:08,231 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 07:20:08" (1/1) ... [2021-10-15 19:20:08,240 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-15 19:20:08,278 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-15 19:20:08,621 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 19:20:08,629 INFO L203 MainTranslator]: Completed pre-run [2021-10-15 19:20:08,673 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 19:20:08,714 INFO L208 MainTranslator]: Completed translation [2021-10-15 19:20:08,715 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:20:08 WrapperNode [2021-10-15 19:20:08,715 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-15 19:20:08,716 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-15 19:20:08,716 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-15 19:20:08,716 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-15 19:20:08,726 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:20:08" (1/1) ... [2021-10-15 19:20:08,727 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:20:08" (1/1) ... [2021-10-15 19:20:08,739 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:20:08" (1/1) ... [2021-10-15 19:20:08,740 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:20:08" (1/1) ... [2021-10-15 19:20:08,753 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:20:08" (1/1) ... [2021-10-15 19:20:08,757 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:20:08" (1/1) ... [2021-10-15 19:20:08,761 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:20:08" (1/1) ... [2021-10-15 19:20:08,766 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-15 19:20:08,767 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-15 19:20:08,768 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-15 19:20:08,768 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-15 19:20:08,769 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:20:08" (1/1) ... [2021-10-15 19:20:08,782 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 19:20:08,791 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afaf3b46-2340-4a26-971c-c4017b245533/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:20:08,803 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afaf3b46-2340-4a26-971c-c4017b245533/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-15 19:20:08,812 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afaf3b46-2340-4a26-971c-c4017b245533/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-15 19:20:08,851 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-10-15 19:20:08,851 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-15 19:20:08,851 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-10-15 19:20:08,852 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-10-15 19:20:08,852 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2021-10-15 19:20:08,852 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2021-10-15 19:20:08,852 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2021-10-15 19:20:08,852 INFO L138 BoogieDeclarations]: Found implementation of procedure cstrlen [2021-10-15 19:20:08,853 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-10-15 19:20:08,853 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-10-15 19:20:08,853 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-10-15 19:20:08,853 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-10-15 19:20:08,853 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-10-15 19:20:08,854 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-10-15 19:20:08,854 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-10-15 19:20:08,854 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-10-15 19:20:08,854 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-10-15 19:20:08,854 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-10-15 19:20:08,855 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-10-15 19:20:08,855 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-10-15 19:20:08,855 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-10-15 19:20:08,855 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-10-15 19:20:08,855 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-10-15 19:20:08,856 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-10-15 19:20:08,856 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-10-15 19:20:08,856 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-10-15 19:20:08,856 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-10-15 19:20:08,856 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2021-10-15 19:20:08,857 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2021-10-15 19:20:08,857 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2021-10-15 19:20:08,857 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-10-15 19:20:08,857 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-10-15 19:20:08,857 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-10-15 19:20:08,857 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-10-15 19:20:08,858 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-10-15 19:20:08,858 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-10-15 19:20:08,858 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-10-15 19:20:08,858 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-10-15 19:20:08,858 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-10-15 19:20:08,859 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-10-15 19:20:08,859 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-10-15 19:20:08,859 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-10-15 19:20:08,859 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-10-15 19:20:08,859 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-10-15 19:20:08,860 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-10-15 19:20:08,860 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-10-15 19:20:08,860 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-10-15 19:20:08,860 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-10-15 19:20:08,860 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-10-15 19:20:08,860 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-10-15 19:20:08,861 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-10-15 19:20:08,861 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-10-15 19:20:08,861 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-10-15 19:20:08,861 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-10-15 19:20:08,861 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-10-15 19:20:08,862 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-10-15 19:20:08,862 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-10-15 19:20:08,862 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-10-15 19:20:08,862 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-10-15 19:20:08,862 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-10-15 19:20:08,863 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-10-15 19:20:08,863 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-10-15 19:20:08,863 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-10-15 19:20:08,863 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-10-15 19:20:08,863 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-10-15 19:20:08,863 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-10-15 19:20:08,864 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-10-15 19:20:08,864 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-10-15 19:20:08,864 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-10-15 19:20:08,864 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-10-15 19:20:08,864 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-10-15 19:20:08,865 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-10-15 19:20:08,865 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-10-15 19:20:08,865 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-10-15 19:20:08,865 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-10-15 19:20:08,865 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-10-15 19:20:08,866 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-10-15 19:20:08,866 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-10-15 19:20:08,866 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-10-15 19:20:08,866 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-10-15 19:20:08,866 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-10-15 19:20:08,866 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-10-15 19:20:08,867 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-10-15 19:20:08,867 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-10-15 19:20:08,867 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-10-15 19:20:08,867 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-10-15 19:20:08,867 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-10-15 19:20:08,867 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-10-15 19:20:08,868 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-10-15 19:20:08,868 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-10-15 19:20:08,868 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-10-15 19:20:08,868 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-10-15 19:20:08,868 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-10-15 19:20:08,869 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-10-15 19:20:08,869 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-10-15 19:20:08,869 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-10-15 19:20:08,869 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-10-15 19:20:08,869 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-10-15 19:20:08,869 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-10-15 19:20:08,870 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-10-15 19:20:08,870 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-10-15 19:20:08,870 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-10-15 19:20:08,870 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-10-15 19:20:08,870 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-10-15 19:20:08,871 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-10-15 19:20:08,871 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-10-15 19:20:08,871 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-10-15 19:20:08,871 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-10-15 19:20:08,871 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-10-15 19:20:08,871 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-10-15 19:20:08,872 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-10-15 19:20:08,872 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-10-15 19:20:08,872 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-10-15 19:20:08,872 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-10-15 19:20:08,872 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-10-15 19:20:08,873 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-10-15 19:20:08,873 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-10-15 19:20:08,873 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2021-10-15 19:20:08,873 INFO L130 BoogieDeclarations]: Found specification of procedure cstrlen [2021-10-15 19:20:08,873 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-15 19:20:08,874 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-10-15 19:20:08,874 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-15 19:20:08,874 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-15 19:20:08,874 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-15 19:20:08,874 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-10-15 19:20:08,875 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-15 19:20:09,322 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-15 19:20:09,322 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-10-15 19:20:09,324 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:20:09 BoogieIcfgContainer [2021-10-15 19:20:09,324 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-15 19:20:09,326 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-15 19:20:09,326 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-15 19:20:09,330 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-15 19:20:09,330 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 07:20:08" (1/3) ... [2021-10-15 19:20:09,331 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7986a8c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 07:20:09, skipping insertion in model container [2021-10-15 19:20:09,331 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:20:08" (2/3) ... [2021-10-15 19:20:09,331 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7986a8c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 07:20:09, skipping insertion in model container [2021-10-15 19:20:09,331 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:20:09" (3/3) ... [2021-10-15 19:20:09,333 INFO L111 eAbstractionObserver]: Analyzing ICFG cstrlen-alloca-2.i [2021-10-15 19:20:09,337 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-15 19:20:09,337 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 7 error locations. [2021-10-15 19:20:09,377 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-15 19:20:09,383 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 [2021-10-15 19:20:09,383 INFO L340 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2021-10-15 19:20:09,396 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 25 states have internal predecessors, (30), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-15 19:20:09,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-15 19:20:09,403 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 19:20:09,404 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:20:09,404 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr2REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 2 more)] === [2021-10-15 19:20:09,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:20:09,410 INFO L82 PathProgramCache]: Analyzing trace with hash 1480341813, now seen corresponding path program 1 times [2021-10-15 19:20:09,418 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:20:09,419 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177571258] [2021-10-15 19:20:09,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:20:09,420 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:20:09,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:20:09,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-15 19:20:09,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:20:09,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:20:09,669 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:20:09,670 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177571258] [2021-10-15 19:20:09,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177571258] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:20:09,671 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:20:09,671 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:20:09,673 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339628669] [2021-10-15 19:20:09,678 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 19:20:09,678 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:20:09,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 19:20:09,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-15 19:20:09,694 INFO L87 Difference]: Start difference. First operand has 32 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 25 states have internal predecessors, (30), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) 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) [2021-10-15 19:20:09,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 19:20:09,771 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2021-10-15 19:20:09,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 19:20:09,773 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 [2021-10-15 19:20:09,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 19:20:09,780 INFO L225 Difference]: With dead ends: 30 [2021-10-15 19:20:09,780 INFO L226 Difference]: Without dead ends: 27 [2021-10-15 19:20:09,782 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.1ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-15 19:20:09,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-10-15 19:20:09,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-10-15 19:20:09,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 17 states have (on average 1.411764705882353) internal successors, (24), 21 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-15 19:20:09,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2021-10-15 19:20:09,812 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 10 [2021-10-15 19:20:09,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 19:20:09,813 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2021-10-15 19:20:09,813 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) [2021-10-15 19:20:09,813 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2021-10-15 19:20:09,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-15 19:20:09,814 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 19:20:09,814 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:20:09,814 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-15 19:20:09,815 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 2 more)] === [2021-10-15 19:20:09,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:20:09,816 INFO L82 PathProgramCache]: Analyzing trace with hash 1480341814, now seen corresponding path program 1 times [2021-10-15 19:20:09,816 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:20:09,816 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955910922] [2021-10-15 19:20:09,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:20:09,817 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:20:09,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:20:09,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-15 19:20:09,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:20:09,920 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:20:09,920 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:20:09,920 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955910922] [2021-10-15 19:20:09,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955910922] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:20:09,921 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:20:09,921 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-15 19:20:09,921 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562341216] [2021-10-15 19:20:09,922 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-15 19:20:09,923 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:20:09,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-15 19:20:09,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-15 19:20:09,924 INFO L87 Difference]: Start difference. First operand 27 states and 29 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) [2021-10-15 19:20:10,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 19:20:10,004 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2021-10-15 19:20:10,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-15 19:20:10,004 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 [2021-10-15 19:20:10,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 19:20:10,005 INFO L225 Difference]: With dead ends: 26 [2021-10-15 19:20:10,005 INFO L226 Difference]: Without dead ends: 26 [2021-10-15 19:20:10,006 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 29.9ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-15 19:20:10,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-10-15 19:20:10,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-10-15 19:20:10,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 20 states have internal predecessors, (23), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-15 19:20:10,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2021-10-15 19:20:10,014 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 10 [2021-10-15 19:20:10,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 19:20:10,015 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2021-10-15 19:20:10,015 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) [2021-10-15 19:20:10,015 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2021-10-15 19:20:10,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-15 19:20:10,015 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 19:20:10,016 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:20:10,016 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-15 19:20:10,016 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 2 more)] === [2021-10-15 19:20:10,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:20:10,017 INFO L82 PathProgramCache]: Analyzing trace with hash 1480341867, now seen corresponding path program 1 times [2021-10-15 19:20:10,017 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:20:10,017 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394302556] [2021-10-15 19:20:10,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:20:10,018 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:20:10,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:20:10,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-15 19:20:10,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:20:10,135 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:20:10,135 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:20:10,136 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394302556] [2021-10-15 19:20:10,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394302556] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:20:10,136 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:20:10,136 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-15 19:20:10,136 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143815929] [2021-10-15 19:20:10,137 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-15 19:20:10,137 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:20:10,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-15 19:20:10,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-15 19:20:10,138 INFO L87 Difference]: Start difference. First operand 26 states and 28 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) [2021-10-15 19:20:10,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 19:20:10,220 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2021-10-15 19:20:10,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-15 19:20:10,224 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 [2021-10-15 19:20:10,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 19:20:10,227 INFO L225 Difference]: With dead ends: 33 [2021-10-15 19:20:10,227 INFO L226 Difference]: Without dead ends: 33 [2021-10-15 19:20:10,228 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 25.6ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-15 19:20:10,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-10-15 19:20:10,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 28. [2021-10-15 19:20:10,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 22 states have internal predecessors, (25), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-15 19:20:10,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2021-10-15 19:20:10,245 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 10 [2021-10-15 19:20:10,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 19:20:10,246 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2021-10-15 19:20:10,246 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) [2021-10-15 19:20:10,246 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2021-10-15 19:20:10,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-15 19:20:10,247 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 19:20:10,247 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:20:10,247 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-15 19:20:10,247 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 2 more)] === [2021-10-15 19:20:10,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:20:10,248 INFO L82 PathProgramCache]: Analyzing trace with hash 1480401449, now seen corresponding path program 1 times [2021-10-15 19:20:10,248 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:20:10,248 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271903614] [2021-10-15 19:20:10,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:20:10,248 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:20:10,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:20:10,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-15 19:20:10,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:20:10,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:20:10,366 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:20:10,366 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271903614] [2021-10-15 19:20:10,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271903614] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:20:10,367 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:20:10,367 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-15 19:20:10,367 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499808957] [2021-10-15 19:20:10,367 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-15 19:20:10,367 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:20:10,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-15 19:20:10,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-15 19:20:10,368 INFO L87 Difference]: Start difference. First operand 28 states and 30 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) [2021-10-15 19:20:10,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 19:20:10,454 INFO L93 Difference]: Finished difference Result 37 states and 40 transitions. [2021-10-15 19:20:10,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-15 19:20:10,454 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 [2021-10-15 19:20:10,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 19:20:10,456 INFO L225 Difference]: With dead ends: 37 [2021-10-15 19:20:10,456 INFO L226 Difference]: Without dead ends: 37 [2021-10-15 19:20:10,457 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 39.8ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-10-15 19:20:10,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-10-15 19:20:10,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 30. [2021-10-15 19:20:10,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 24 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-15 19:20:10,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2021-10-15 19:20:10,466 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 10 [2021-10-15 19:20:10,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 19:20:10,467 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2021-10-15 19:20:10,467 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) [2021-10-15 19:20:10,467 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2021-10-15 19:20:10,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-15 19:20:10,470 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 19:20:10,470 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:20:10,470 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-15 19:20:10,472 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting cstrlenErr0REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 2 more)] === [2021-10-15 19:20:10,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:20:10,473 INFO L82 PathProgramCache]: Analyzing trace with hash 138789715, now seen corresponding path program 1 times [2021-10-15 19:20:10,473 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:20:10,473 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564124224] [2021-10-15 19:20:10,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:20:10,474 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:20:10,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:20:10,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-15 19:20:10,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:20:10,582 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:20:10,582 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:20:10,582 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564124224] [2021-10-15 19:20:10,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564124224] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:20:10,583 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:20:10,583 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-15 19:20:10,583 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206469663] [2021-10-15 19:20:10,583 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-15 19:20:10,583 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:20:10,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-15 19:20:10,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-15 19:20:10,584 INFO L87 Difference]: Start difference. First operand 30 states and 33 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) [2021-10-15 19:20:10,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 19:20:10,679 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2021-10-15 19:20:10,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-15 19:20:10,679 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 [2021-10-15 19:20:10,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 19:20:10,680 INFO L225 Difference]: With dead ends: 29 [2021-10-15 19:20:10,680 INFO L226 Difference]: Without dead ends: 29 [2021-10-15 19:20:10,681 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 35.7ms TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-10-15 19:20:10,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-10-15 19:20:10,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-10-15 19:20:10,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 23 states have internal predecessors, (27), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-15 19:20:10,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2021-10-15 19:20:10,684 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 13 [2021-10-15 19:20:10,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 19:20:10,685 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2021-10-15 19:20:10,685 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) [2021-10-15 19:20:10,685 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2021-10-15 19:20:10,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-15 19:20:10,685 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 19:20:10,686 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:20:10,686 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-15 19:20:10,686 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting cstrlenErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 2 more)] === [2021-10-15 19:20:10,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:20:10,687 INFO L82 PathProgramCache]: Analyzing trace with hash 138789716, now seen corresponding path program 1 times [2021-10-15 19:20:10,687 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:20:10,687 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369490224] [2021-10-15 19:20:10,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:20:10,687 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:20:10,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:20:10,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-15 19:20:10,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:20:10,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:20:10,781 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:20:10,782 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369490224] [2021-10-15 19:20:10,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369490224] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:20:10,782 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:20:10,782 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-10-15 19:20:10,782 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463892504] [2021-10-15 19:20:10,783 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-15 19:20:10,783 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:20:10,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-15 19:20:10,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-10-15 19:20:10,784 INFO L87 Difference]: Start difference. First operand 29 states and 32 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) [2021-10-15 19:20:10,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 19:20:10,906 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2021-10-15 19:20:10,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-15 19:20:10,907 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 [2021-10-15 19:20:10,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 19:20:10,909 INFO L225 Difference]: With dead ends: 34 [2021-10-15 19:20:10,909 INFO L226 Difference]: Without dead ends: 34 [2021-10-15 19:20:10,909 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 74.9ms TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-10-15 19:20:10,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-10-15 19:20:10,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 30. [2021-10-15 19:20:10,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 24 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-15 19:20:10,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2021-10-15 19:20:10,913 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 13 [2021-10-15 19:20:10,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 19:20:10,913 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2021-10-15 19:20:10,913 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) [2021-10-15 19:20:10,913 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2021-10-15 19:20:10,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-15 19:20:10,914 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 19:20:10,914 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:20:10,914 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-15 19:20:10,915 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting cstrlenErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 2 more)] === [2021-10-15 19:20:10,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:20:10,915 INFO L82 PathProgramCache]: Analyzing trace with hash 232930637, now seen corresponding path program 1 times [2021-10-15 19:20:10,915 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:20:10,915 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822713766] [2021-10-15 19:20:10,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:20:10,916 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:20:10,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:20:11,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-15 19:20:11,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:20:11,057 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:20:11,057 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:20:11,058 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822713766] [2021-10-15 19:20:11,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822713766] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:20:11,058 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:20:11,058 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-10-15 19:20:11,058 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229780191] [2021-10-15 19:20:11,059 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-15 19:20:11,059 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:20:11,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-15 19:20:11,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-10-15 19:20:11,060 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 9 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 19:20:11,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 19:20:11,231 INFO L93 Difference]: Finished difference Result 41 states and 43 transitions. [2021-10-15 19:20:11,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-15 19:20:11,232 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-10-15 19:20:11,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 19:20:11,233 INFO L225 Difference]: With dead ends: 41 [2021-10-15 19:20:11,233 INFO L226 Difference]: Without dead ends: 41 [2021-10-15 19:20:11,234 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 121.4ms TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-10-15 19:20:11,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-10-15 19:20:11,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 38. [2021-10-15 19:20:11,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 31 states have internal predecessors, (34), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-15 19:20:11,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2021-10-15 19:20:11,248 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 15 [2021-10-15 19:20:11,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 19:20:11,249 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2021-10-15 19:20:11,249 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 19:20:11,250 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2021-10-15 19:20:11,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-15 19:20:11,251 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 19:20:11,251 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:20:11,252 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-15 19:20:11,252 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting cstrlenErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 2 more)] === [2021-10-15 19:20:11,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:20:11,252 INFO L82 PathProgramCache]: Analyzing trace with hash 912989007, now seen corresponding path program 1 times [2021-10-15 19:20:11,253 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:20:11,253 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670589529] [2021-10-15 19:20:11,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:20:11,253 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:20:11,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:20:11,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-15 19:20:11,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:20:11,431 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:20:11,431 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:20:11,431 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670589529] [2021-10-15 19:20:11,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670589529] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:20:11,432 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:20:11,432 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-15 19:20:11,432 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070655504] [2021-10-15 19:20:11,433 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-15 19:20:11,433 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:20:11,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-15 19:20:11,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-10-15 19:20:11,434 INFO L87 Difference]: Start difference. First operand 38 states and 41 transitions. Second operand has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 8 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 19:20:11,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 19:20:11,622 INFO L93 Difference]: Finished difference Result 51 states and 53 transitions. [2021-10-15 19:20:11,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-15 19:20:11,623 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 8 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-10-15 19:20:11,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 19:20:11,626 INFO L225 Difference]: With dead ends: 51 [2021-10-15 19:20:11,626 INFO L226 Difference]: Without dead ends: 51 [2021-10-15 19:20:11,626 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 125.6ms TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-10-15 19:20:11,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-10-15 19:20:11,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 38. [2021-10-15 19:20:11,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 31 states have internal predecessors, (34), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-15 19:20:11,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2021-10-15 19:20:11,641 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 15 [2021-10-15 19:20:11,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 19:20:11,641 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2021-10-15 19:20:11,642 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 8 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 19:20:11,642 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2021-10-15 19:20:11,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-15 19:20:11,642 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 19:20:11,642 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:20:11,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-15 19:20:11,643 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 2 more)] === [2021-10-15 19:20:11,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:20:11,643 INFO L82 PathProgramCache]: Analyzing trace with hash -754029460, now seen corresponding path program 1 times [2021-10-15 19:20:11,643 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:20:11,644 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844770190] [2021-10-15 19:20:11,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:20:11,644 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:20:11,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:20:11,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-15 19:20:11,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:20:11,735 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:20:11,736 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:20:11,736 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844770190] [2021-10-15 19:20:11,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844770190] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:20:11,736 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987326072] [2021-10-15 19:20:11,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:20:11,736 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:20:11,737 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afaf3b46-2340-4a26-971c-c4017b245533/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:20:11,738 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afaf3b46-2340-4a26-971c-c4017b245533/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:20:11,764 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afaf3b46-2340-4a26-971c-c4017b245533/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-15 19:20:11,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:20:11,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-15 19:20:11,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:20:12,020 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 [2021-10-15 19:20:12,124 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:20:12,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1987326072] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:20:12,127 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 19:20:12,127 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2021-10-15 19:20:12,129 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843051845] [2021-10-15 19:20:12,130 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-15 19:20:12,130 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:20:12,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-15 19:20:12,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-10-15 19:20:12,135 INFO L87 Difference]: Start difference. First operand 38 states and 41 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 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) [2021-10-15 19:20:12,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 19:20:12,219 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2021-10-15 19:20:12,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-15 19:20:12,219 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 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 [2021-10-15 19:20:12,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 19:20:12,220 INFO L225 Difference]: With dead ends: 42 [2021-10-15 19:20:12,220 INFO L226 Difference]: Without dead ends: 42 [2021-10-15 19:20:12,221 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 50.9ms TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-10-15 19:20:12,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-10-15 19:20:12,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 36. [2021-10-15 19:20:12,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 29 states have internal predecessors, (32), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-15 19:20:12,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2021-10-15 19:20:12,234 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 14 [2021-10-15 19:20:12,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 19:20:12,235 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2021-10-15 19:20:12,236 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 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) [2021-10-15 19:20:12,236 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2021-10-15 19:20:12,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-15 19:20:12,237 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 19:20:12,237 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:20:12,275 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afaf3b46-2340-4a26-971c-c4017b245533/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-15 19:20:12,456 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afaf3b46-2340-4a26-971c-c4017b245533/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:20:12,457 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr4ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 2 more)] === [2021-10-15 19:20:12,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:20:12,457 INFO L82 PathProgramCache]: Analyzing trace with hash -1444358493, now seen corresponding path program 1 times [2021-10-15 19:20:12,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:20:12,457 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498628906] [2021-10-15 19:20:12,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:20:12,458 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:20:12,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:20:12,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-15 19:20:12,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:20:12,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-10-15 19:20:12,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:20:12,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:20:12,522 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:20:12,522 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498628906] [2021-10-15 19:20:12,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498628906] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:20:12,524 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:20:12,524 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-15 19:20:12,524 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102770538] [2021-10-15 19:20:12,524 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-15 19:20:12,525 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:20:12,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-15 19:20:12,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-15 19:20:12,525 INFO L87 Difference]: Start difference. First operand 36 states and 39 transitions. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 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) [2021-10-15 19:20:12,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 19:20:12,566 INFO L93 Difference]: Finished difference Result 35 states and 38 transitions. [2021-10-15 19:20:12,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 19:20:12,567 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 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 19 [2021-10-15 19:20:12,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 19:20:12,567 INFO L225 Difference]: With dead ends: 35 [2021-10-15 19:20:12,568 INFO L226 Difference]: Without dead ends: 20 [2021-10-15 19:20:12,568 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.9ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-15 19:20:12,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-10-15 19:20:12,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-10-15 19:20:12,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 19:20:12,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2021-10-15 19:20:12,570 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 19 [2021-10-15 19:20:12,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 19:20:12,570 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2021-10-15 19:20:12,570 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 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) [2021-10-15 19:20:12,570 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2021-10-15 19:20:12,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-15 19:20:12,573 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 19:20:12,573 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:20:12,573 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-10-15 19:20:12,573 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting cstrlenErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 2 more)] === [2021-10-15 19:20:12,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:20:12,575 INFO L82 PathProgramCache]: Analyzing trace with hash -1892891924, now seen corresponding path program 1 times [2021-10-15 19:20:12,575 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:20:12,575 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326307115] [2021-10-15 19:20:12,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:20:12,575 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:20:12,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:20:12,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-15 19:20:12,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:20:12,746 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:20:12,746 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:20:12,747 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326307115] [2021-10-15 19:20:12,747 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326307115] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:20:12,747 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662297230] [2021-10-15 19:20:12,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:20:12,747 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:20:12,747 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afaf3b46-2340-4a26-971c-c4017b245533/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:20:12,748 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afaf3b46-2340-4a26-971c-c4017b245533/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:20:12,774 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afaf3b46-2340-4a26-971c-c4017b245533/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-15 19:20:12,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:20:12,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-15 19:20:12,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:20:13,039 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:20:13,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1662297230] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:20:13,039 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 19:20:13,039 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 15 [2021-10-15 19:20:13,041 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8726863] [2021-10-15 19:20:13,044 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-15 19:20:13,044 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:20:13,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-15 19:20:13,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-10-15 19:20:13,046 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand has 16 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 19:20:13,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 19:20:13,194 INFO L93 Difference]: Finished difference Result 26 states and 27 transitions. [2021-10-15 19:20:13,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-15 19:20:13,199 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2021-10-15 19:20:13,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 19:20:13,199 INFO L225 Difference]: With dead ends: 26 [2021-10-15 19:20:13,199 INFO L226 Difference]: Without dead ends: 26 [2021-10-15 19:20:13,200 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 201.1ms TimeCoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2021-10-15 19:20:13,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-10-15 19:20:13,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 22. [2021-10-15 19:20:13,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 17 states have internal predecessors, (19), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 19:20:13,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2021-10-15 19:20:13,201 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 19 [2021-10-15 19:20:13,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 19:20:13,202 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2021-10-15 19:20:13,202 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 19:20:13,202 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2021-10-15 19:20:13,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-15 19:20:13,202 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 19:20:13,202 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:20:13,236 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afaf3b46-2340-4a26-971c-c4017b245533/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-15 19:20:13,403 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afaf3b46-2340-4a26-971c-c4017b245533/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-10-15 19:20:13,403 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting cstrlenErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 2 more)] === [2021-10-15 19:20:13,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:20:13,404 INFO L82 PathProgramCache]: Analyzing trace with hash 1996994277, now seen corresponding path program 2 times [2021-10-15 19:20:13,404 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:20:13,404 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857617479] [2021-10-15 19:20:13,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:20:13,404 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:20:13,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:20:13,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-15 19:20:13,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:20:13,648 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:20:13,648 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:20:13,648 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857617479] [2021-10-15 19:20:13,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857617479] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:20:13,648 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840178681] [2021-10-15 19:20:13,648 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-15 19:20:13,649 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:20:13,649 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afaf3b46-2340-4a26-971c-c4017b245533/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:20:13,649 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afaf3b46-2340-4a26-971c-c4017b245533/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:20:13,687 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afaf3b46-2340-4a26-971c-c4017b245533/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-15 19:20:13,793 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-15 19:20:13,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:20:13,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 28 conjunts are in the unsatisfiable core [2021-10-15 19:20:13,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:20:13,871 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 [2021-10-15 19:20:14,265 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-15 19:20:14,265 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 [2021-10-15 19:20:14,391 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:20:14,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1840178681] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:20:14,392 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 19:20:14,392 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 21 [2021-10-15 19:20:14,392 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369837189] [2021-10-15 19:20:14,393 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-10-15 19:20:14,394 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:20:14,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-15 19:20:14,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=372, Unknown=0, NotChecked=0, Total=420 [2021-10-15 19:20:14,395 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand has 21 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 states have internal predecessors, (31), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 19:20:15,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 19:20:15,178 INFO L93 Difference]: Finished difference Result 39 states and 40 transitions. [2021-10-15 19:20:15,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-15 19:20:15,179 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 states have internal predecessors, (31), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2021-10-15 19:20:15,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 19:20:15,179 INFO L225 Difference]: With dead ends: 39 [2021-10-15 19:20:15,179 INFO L226 Difference]: Without dead ends: 32 [2021-10-15 19:20:15,180 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 850.9ms TimeCoverageRelationStatistics Valid=166, Invalid=1094, Unknown=0, NotChecked=0, Total=1260 [2021-10-15 19:20:15,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-10-15 19:20:15,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 28. [2021-10-15 19:20:15,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.0869565217391304) internal successors, (25), 23 states have internal predecessors, (25), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 19:20:15,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2021-10-15 19:20:15,182 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 21 [2021-10-15 19:20:15,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 19:20:15,182 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2021-10-15 19:20:15,183 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 states have internal predecessors, (31), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 19:20:15,183 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2021-10-15 19:20:15,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-15 19:20:15,183 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 19:20:15,184 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:20:15,220 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afaf3b46-2340-4a26-971c-c4017b245533/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-15 19:20:15,396 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afaf3b46-2340-4a26-971c-c4017b245533/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:20:15,397 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting cstrlenErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 2 more)] === [2021-10-15 19:20:15,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:20:15,397 INFO L82 PathProgramCache]: Analyzing trace with hash 1847085883, now seen corresponding path program 3 times [2021-10-15 19:20:15,397 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:20:15,397 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629706597] [2021-10-15 19:20:15,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:20:15,397 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:20:15,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:20:15,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-15 19:20:15,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:20:15,582 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:20:15,582 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:20:15,582 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629706597] [2021-10-15 19:20:15,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629706597] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:20:15,582 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436138331] [2021-10-15 19:20:15,583 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-15 19:20:15,583 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:20:15,583 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afaf3b46-2340-4a26-971c-c4017b245533/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:20:15,584 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afaf3b46-2340-4a26-971c-c4017b245533/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:20:15,606 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afaf3b46-2340-4a26-971c-c4017b245533/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-15 19:20:15,728 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-10-15 19:20:15,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:20:15,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 31 conjunts are in the unsatisfiable core [2021-10-15 19:20:15,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:20:15,884 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 21 treesize of output 17 [2021-10-15 19:20:16,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-10-15 19:20:16,089 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:20:16,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [436138331] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:20:16,092 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 19:20:16,092 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 22 [2021-10-15 19:20:16,096 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163017865] [2021-10-15 19:20:16,098 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-10-15 19:20:16,098 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:20:16,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-10-15 19:20:16,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2021-10-15 19:20:16,099 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand has 22 states, 20 states have (on average 1.9) internal successors, (38), 19 states have internal predecessors, (38), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 19:20:16,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 19:20:16,477 INFO L93 Difference]: Finished difference Result 44 states and 45 transitions. [2021-10-15 19:20:16,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-15 19:20:16,477 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 1.9) internal successors, (38), 19 states have internal predecessors, (38), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2021-10-15 19:20:16,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 19:20:16,478 INFO L225 Difference]: With dead ends: 44 [2021-10-15 19:20:16,478 INFO L226 Difference]: Without dead ends: 35 [2021-10-15 19:20:16,478 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 430.4ms TimeCoverageRelationStatistics Valid=111, Invalid=759, Unknown=0, NotChecked=0, Total=870 [2021-10-15 19:20:16,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-10-15 19:20:16,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2021-10-15 19:20:16,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 27 states have (on average 1.0740740740740742) internal successors, (29), 27 states have internal predecessors, (29), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 19:20:16,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2021-10-15 19:20:16,481 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 27 [2021-10-15 19:20:16,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 19:20:16,481 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2021-10-15 19:20:16,481 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 1.9) internal successors, (38), 19 states have internal predecessors, (38), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 19:20:16,481 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2021-10-15 19:20:16,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-10-15 19:20:16,482 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 19:20:16,482 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:20:16,526 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afaf3b46-2340-4a26-971c-c4017b245533/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-15 19:20:16,696 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afaf3b46-2340-4a26-971c-c4017b245533/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-10-15 19:20:16,696 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting cstrlenErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 2 more)] === [2021-10-15 19:20:16,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:20:16,697 INFO L82 PathProgramCache]: Analyzing trace with hash 1827827544, now seen corresponding path program 4 times [2021-10-15 19:20:16,697 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:20:16,697 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570645456] [2021-10-15 19:20:16,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:20:16,697 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:20:16,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:20:16,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-15 19:20:16,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:20:16,920 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:20:16,920 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:20:16,920 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570645456] [2021-10-15 19:20:16,920 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570645456] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:20:16,921 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135902837] [2021-10-15 19:20:16,921 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-15 19:20:16,921 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:20:16,921 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afaf3b46-2340-4a26-971c-c4017b245533/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:20:16,922 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afaf3b46-2340-4a26-971c-c4017b245533/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:20:16,941 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afaf3b46-2340-4a26-971c-c4017b245533/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-15 19:20:17,079 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-15 19:20:17,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:20:17,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 38 conjunts are in the unsatisfiable core [2021-10-15 19:20:17,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:20:17,113 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 [2021-10-15 19:20:17,299 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 16 treesize of output 12 [2021-10-15 19:20:17,569 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-15 19:20:17,570 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 [2021-10-15 19:20:17,660 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:20:17,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2135902837] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:20:17,660 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 19:20:17,660 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-10-15 19:20:17,661 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361731319] [2021-10-15 19:20:17,661 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-10-15 19:20:17,661 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:20:17,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-10-15 19:20:17,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=455, Unknown=0, NotChecked=0, Total=506 [2021-10-15 19:20:17,662 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand has 23 states, 20 states have (on average 2.35) internal successors, (47), 20 states have internal predecessors, (47), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 19:20:18,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 19:20:18,245 INFO L93 Difference]: Finished difference Result 35 states and 36 transitions. [2021-10-15 19:20:18,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-15 19:20:18,245 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 20 states have (on average 2.35) internal successors, (47), 20 states have internal predecessors, (47), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2021-10-15 19:20:18,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 19:20:18,246 INFO L225 Difference]: With dead ends: 35 [2021-10-15 19:20:18,246 INFO L226 Difference]: Without dead ends: 35 [2021-10-15 19:20:18,247 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 665.9ms TimeCoverageRelationStatistics Valid=124, Invalid=868, Unknown=0, NotChecked=0, Total=992 [2021-10-15 19:20:18,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-10-15 19:20:18,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2021-10-15 19:20:18,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 29 states have (on average 1.0689655172413792) internal successors, (31), 29 states have internal predecessors, (31), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 19:20:18,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2021-10-15 19:20:18,249 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 31 [2021-10-15 19:20:18,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 19:20:18,250 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2021-10-15 19:20:18,250 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 20 states have (on average 2.35) internal successors, (47), 20 states have internal predecessors, (47), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 19:20:18,250 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2021-10-15 19:20:18,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-10-15 19:20:18,251 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 19:20:18,251 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:20:18,292 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afaf3b46-2340-4a26-971c-c4017b245533/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-15 19:20:18,460 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afaf3b46-2340-4a26-971c-c4017b245533/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-10-15 19:20:18,460 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting cstrlenErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 2 more)] === [2021-10-15 19:20:18,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:20:18,461 INFO L82 PathProgramCache]: Analyzing trace with hash -99354543, now seen corresponding path program 5 times [2021-10-15 19:20:18,461 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:20:18,461 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251600862] [2021-10-15 19:20:18,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:20:18,461 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:20:18,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:20:18,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-15 19:20:18,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:20:18,719 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:20:18,720 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:20:18,720 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251600862] [2021-10-15 19:20:18,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251600862] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:20:18,720 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776501509] [2021-10-15 19:20:18,720 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-15 19:20:18,720 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:20:18,721 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afaf3b46-2340-4a26-971c-c4017b245533/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:20:18,728 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afaf3b46-2340-4a26-971c-c4017b245533/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:20:18,747 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afaf3b46-2340-4a26-971c-c4017b245533/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-15 19:20:18,934 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-10-15 19:20:18,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:20:18,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 39 conjunts are in the unsatisfiable core [2021-10-15 19:20:18,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:20:19,127 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 21 treesize of output 17 [2021-10-15 19:20:19,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-10-15 19:20:19,331 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:20:19,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1776501509] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:20:19,331 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 19:20:19,331 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 25 [2021-10-15 19:20:19,332 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417278893] [2021-10-15 19:20:19,332 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-10-15 19:20:19,332 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:20:19,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-10-15 19:20:19,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-10-15 19:20:19,334 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand has 25 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 19:20:19,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 19:20:19,796 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2021-10-15 19:20:19,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-15 19:20:19,796 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2021-10-15 19:20:19,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 19:20:19,797 INFO L225 Difference]: With dead ends: 52 [2021-10-15 19:20:19,797 INFO L226 Difference]: Without dead ends: 41 [2021-10-15 19:20:19,798 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 519.9ms TimeCoverageRelationStatistics Valid=125, Invalid=997, Unknown=0, NotChecked=0, Total=1122 [2021-10-15 19:20:19,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-10-15 19:20:19,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 38. [2021-10-15 19:20:19,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 33 states have (on average 1.0606060606060606) internal successors, (35), 33 states have internal predecessors, (35), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 19:20:19,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2021-10-15 19:20:19,800 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 33 [2021-10-15 19:20:19,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 19:20:19,800 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2021-10-15 19:20:19,801 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 19:20:19,801 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2021-10-15 19:20:19,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-10-15 19:20:19,801 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 19:20:19,801 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:20:19,838 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afaf3b46-2340-4a26-971c-c4017b245533/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-15 19:20:20,002 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afaf3b46-2340-4a26-971c-c4017b245533/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:20:20,002 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting cstrlenErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 2 more)] === [2021-10-15 19:20:20,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:20:20,003 INFO L82 PathProgramCache]: Analyzing trace with hash 1272435374, now seen corresponding path program 6 times [2021-10-15 19:20:20,003 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:20:20,003 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920569150] [2021-10-15 19:20:20,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:20:20,003 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:20:20,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:20:20,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-15 19:20:20,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:20:20,248 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 6 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:20:20,248 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:20:20,248 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920569150] [2021-10-15 19:20:20,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920569150] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:20:20,248 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677404439] [2021-10-15 19:20:20,248 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-15 19:20:20,248 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:20:20,248 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afaf3b46-2340-4a26-971c-c4017b245533/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:20:20,249 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afaf3b46-2340-4a26-971c-c4017b245533/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:20:20,279 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afaf3b46-2340-4a26-971c-c4017b245533/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-15 19:20:20,491 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-10-15 19:20:20,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:20:20,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 33 conjunts are in the unsatisfiable core [2021-10-15 19:20:20,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:20:20,841 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 15 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:20:20,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1677404439] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:20:20,841 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 19:20:20,841 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 27 [2021-10-15 19:20:20,841 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043687946] [2021-10-15 19:20:20,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-10-15 19:20:20,842 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:20:20,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-10-15 19:20:20,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=660, Unknown=0, NotChecked=0, Total=756 [2021-10-15 19:20:20,843 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand has 28 states, 25 states have (on average 2.52) internal successors, (63), 25 states have internal predecessors, (63), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 19:20:21,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 19:20:21,165 INFO L93 Difference]: Finished difference Result 41 states and 42 transitions. [2021-10-15 19:20:21,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-15 19:20:21,166 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 25 states have (on average 2.52) internal successors, (63), 25 states have internal predecessors, (63), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2021-10-15 19:20:21,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 19:20:21,166 INFO L225 Difference]: With dead ends: 41 [2021-10-15 19:20:21,166 INFO L226 Difference]: Without dead ends: 41 [2021-10-15 19:20:21,167 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 446.3ms TimeCoverageRelationStatistics Valid=164, Invalid=1026, Unknown=0, NotChecked=0, Total=1190 [2021-10-15 19:20:21,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-10-15 19:20:21,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2021-10-15 19:20:21,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 35 states have (on average 1.0571428571428572) internal successors, (37), 35 states have internal predecessors, (37), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 19:20:21,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2021-10-15 19:20:21,169 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 37 [2021-10-15 19:20:21,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 19:20:21,170 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2021-10-15 19:20:21,170 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 25 states have (on average 2.52) internal successors, (63), 25 states have internal predecessors, (63), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 19:20:21,170 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2021-10-15 19:20:21,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-10-15 19:20:21,171 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 19:20:21,171 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:20:21,201 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afaf3b46-2340-4a26-971c-c4017b245533/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-15 19:20:21,384 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afaf3b46-2340-4a26-971c-c4017b245533/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:20:21,384 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting cstrlenErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 2 more)] === [2021-10-15 19:20:21,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:20:21,385 INFO L82 PathProgramCache]: Analyzing trace with hash -1255285209, now seen corresponding path program 7 times [2021-10-15 19:20:21,385 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:20:21,385 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553922862] [2021-10-15 19:20:21,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:20:21,385 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:20:21,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:20:21,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-15 19:20:21,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:20:21,654 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 5 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:20:21,654 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:20:21,654 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553922862] [2021-10-15 19:20:21,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553922862] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:20:21,654 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113540797] [2021-10-15 19:20:21,654 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-15 19:20:21,655 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:20:21,655 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afaf3b46-2340-4a26-971c-c4017b245533/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:20:21,660 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afaf3b46-2340-4a26-971c-c4017b245533/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:20:21,680 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afaf3b46-2340-4a26-971c-c4017b245533/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-15 19:20:21,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:20:21,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 43 conjunts are in the unsatisfiable core [2021-10-15 19:20:21,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:20:22,086 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 [2021-10-15 19:20:22,859 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-15 19:20:22,860 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 [2021-10-15 19:20:23,011 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 15 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:20:23,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113540797] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:20:23,011 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 19:20:23,011 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 33 [2021-10-15 19:20:23,011 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511609512] [2021-10-15 19:20:23,012 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-10-15 19:20:23,012 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:20:23,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-10-15 19:20:23,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=972, Unknown=0, NotChecked=0, Total=1056 [2021-10-15 19:20:23,013 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand has 33 states, 31 states have (on average 2.161290322580645) internal successors, (67), 30 states have internal predecessors, (67), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 19:20:25,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 19:20:25,142 INFO L93 Difference]: Finished difference Result 63 states and 64 transitions. [2021-10-15 19:20:25,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-10-15 19:20:25,142 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 31 states have (on average 2.161290322580645) internal successors, (67), 30 states have internal predecessors, (67), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 39 [2021-10-15 19:20:25,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 19:20:25,143 INFO L225 Difference]: With dead ends: 63 [2021-10-15 19:20:25,143 INFO L226 Difference]: Without dead ends: 50 [2021-10-15 19:20:25,144 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 1533.4ms TimeCoverageRelationStatistics Valid=275, Invalid=2695, Unknown=0, NotChecked=0, Total=2970 [2021-10-15 19:20:25,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-10-15 19:20:25,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 46. [2021-10-15 19:20:25,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 41 states have (on average 1.048780487804878) internal successors, (43), 41 states have internal predecessors, (43), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 19:20:25,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2021-10-15 19:20:25,147 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 39 [2021-10-15 19:20:25,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 19:20:25,148 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2021-10-15 19:20:25,148 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 31 states have (on average 2.161290322580645) internal successors, (67), 30 states have internal predecessors, (67), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 19:20:25,148 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2021-10-15 19:20:25,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-10-15 19:20:25,149 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 19:20:25,149 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:20:25,188 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afaf3b46-2340-4a26-971c-c4017b245533/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-10-15 19:20:25,364 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afaf3b46-2340-4a26-971c-c4017b245533/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-10-15 19:20:25,365 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting cstrlenErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 2 more)] === [2021-10-15 19:20:25,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:20:25,365 INFO L82 PathProgramCache]: Analyzing trace with hash 592780477, now seen corresponding path program 8 times [2021-10-15 19:20:25,365 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:20:25,365 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118728787] [2021-10-15 19:20:25,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:20:25,365 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:20:25,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:20:25,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-15 19:20:25,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:20:25,708 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 6 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:20:25,709 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:20:25,709 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118728787] [2021-10-15 19:20:25,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118728787] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:20:25,709 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930476797] [2021-10-15 19:20:25,709 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-15 19:20:25,709 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:20:25,710 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afaf3b46-2340-4a26-971c-c4017b245533/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:20:25,711 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afaf3b46-2340-4a26-971c-c4017b245533/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:20:25,712 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afaf3b46-2340-4a26-971c-c4017b245533/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-10-15 19:20:25,942 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-15 19:20:25,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:20:25,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 48 conjunts are in the unsatisfiable core [2021-10-15 19:20:25,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:20:26,160 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 [2021-10-15 19:20:27,157 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-15 19:20:27,157 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 [2021-10-15 19:20:27,311 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 28 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:20:27,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1930476797] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:20:27,312 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 19:20:27,312 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 37 [2021-10-15 19:20:27,313 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015488535] [2021-10-15 19:20:27,313 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-10-15 19:20:27,313 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:20:27,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-10-15 19:20:27,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1231, Unknown=0, NotChecked=0, Total=1332 [2021-10-15 19:20:27,315 INFO L87 Difference]: Start difference. First operand 46 states and 47 transitions. Second operand has 37 states, 35 states have (on average 2.257142857142857) internal successors, (79), 34 states have internal predecessors, (79), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 19:20:30,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 19:20:30,981 INFO L93 Difference]: Finished difference Result 71 states and 72 transitions. [2021-10-15 19:20:30,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-10-15 19:20:30,982 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 35 states have (on average 2.257142857142857) internal successors, (79), 34 states have internal predecessors, (79), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2021-10-15 19:20:30,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 19:20:30,983 INFO L225 Difference]: With dead ends: 71 [2021-10-15 19:20:30,983 INFO L226 Difference]: Without dead ends: 56 [2021-10-15 19:20:30,984 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 514 ImplicationChecksByTransitivity, 2011.9ms TimeCoverageRelationStatistics Valid=314, Invalid=3346, Unknown=0, NotChecked=0, Total=3660 [2021-10-15 19:20:30,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-10-15 19:20:30,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 52. [2021-10-15 19:20:30,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 47 states have (on average 1.0425531914893618) internal successors, (49), 47 states have internal predecessors, (49), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 19:20:30,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2021-10-15 19:20:30,987 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 45 [2021-10-15 19:20:30,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 19:20:30,988 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2021-10-15 19:20:30,988 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 35 states have (on average 2.257142857142857) internal successors, (79), 34 states have internal predecessors, (79), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 19:20:30,988 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2021-10-15 19:20:30,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-10-15 19:20:30,989 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 19:20:30,989 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:20:31,015 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afaf3b46-2340-4a26-971c-c4017b245533/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-10-15 19:20:31,200 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afaf3b46-2340-4a26-971c-c4017b245533/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-10-15 19:20:31,201 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting cstrlenErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 2 more)] === [2021-10-15 19:20:31,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:20:31,201 INFO L82 PathProgramCache]: Analyzing trace with hash -1607150573, now seen corresponding path program 9 times [2021-10-15 19:20:31,201 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:20:31,201 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717460402] [2021-10-15 19:20:31,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:20:31,202 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:20:31,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:20:31,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-15 19:20:31,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:20:31,559 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 7 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:20:31,559 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:20:31,559 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717460402] [2021-10-15 19:20:31,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717460402] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:20:31,560 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656339916] [2021-10-15 19:20:31,560 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-15 19:20:31,560 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:20:31,560 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afaf3b46-2340-4a26-971c-c4017b245533/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:20:31,561 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afaf3b46-2340-4a26-971c-c4017b245533/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:20:31,563 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afaf3b46-2340-4a26-971c-c4017b245533/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-10-15 19:20:31,825 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-10-15 19:20:31,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:20:31,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 35 conjunts are in the unsatisfiable core [2021-10-15 19:20:31,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:20:31,865 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 [2021-10-15 19:20:32,067 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 23 treesize of output 19 [2021-10-15 19:20:32,452 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-15 19:20:32,452 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 26 treesize of output 26 [2021-10-15 19:20:32,542 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-10-15 19:20:32,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [656339916] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:20:32,543 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 19:20:32,543 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 7] total 28 [2021-10-15 19:20:32,543 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419859235] [2021-10-15 19:20:32,543 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-10-15 19:20:32,543 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:20:32,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-10-15 19:20:32,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=702, Unknown=0, NotChecked=0, Total=756 [2021-10-15 19:20:32,544 INFO L87 Difference]: Start difference. First operand 52 states and 53 transitions. Second operand has 28 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 19:20:34,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 19:20:34,279 INFO L93 Difference]: Finished difference Result 75 states and 76 transitions. [2021-10-15 19:20:34,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-10-15 19:20:34,279 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2021-10-15 19:20:34,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 19:20:34,280 INFO L225 Difference]: With dead ends: 75 [2021-10-15 19:20:34,280 INFO L226 Difference]: Without dead ends: 0 [2021-10-15 19:20:34,281 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 436 ImplicationChecksByTransitivity, 1718.4ms TimeCoverageRelationStatistics Valid=345, Invalid=3077, Unknown=0, NotChecked=0, Total=3422 [2021-10-15 19:20:34,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-15 19:20:34,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-15 19:20:34,281 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) [2021-10-15 19:20:34,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-15 19:20:34,282 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 51 [2021-10-15 19:20:34,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 19:20:34,282 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-15 19:20:34,282 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 19:20:34,282 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-15 19:20:34,283 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-15 19:20:34,285 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr0REQUIRES_VIOLATION [2021-10-15 19:20:34,286 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr1REQUIRES_VIOLATION [2021-10-15 19:20:34,286 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr2REQUIRES_VIOLATION [2021-10-15 19:20:34,286 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr3REQUIRES_VIOLATION [2021-10-15 19:20:34,286 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr4ENSURES_VIOLATIONMEMORY_LEAK [2021-10-15 19:20:34,286 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrlenErr0REQUIRES_VIOLATION [2021-10-15 19:20:34,287 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrlenErr1REQUIRES_VIOLATION [2021-10-15 19:20:34,314 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afaf3b46-2340-4a26-971c-c4017b245533/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-10-15 19:20:34,500 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afaf3b46-2340-4a26-971c-c4017b245533/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:20:34,504 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-15 19:20:34,506 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.10 07:20:34 BoogieIcfgContainer [2021-10-15 19:20:34,506 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-15 19:20:34,506 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-15 19:20:34,506 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-15 19:20:34,506 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-15 19:20:34,507 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:20:09" (3/4) ... [2021-10-15 19:20:34,510 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-15 19:20:34,517 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2021-10-15 19:20:34,517 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __bswap_32 [2021-10-15 19:20:34,518 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __bswap_64 [2021-10-15 19:20:34,518 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __uint16_identity [2021-10-15 19:20:34,518 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __uint64_identity [2021-10-15 19:20:34,518 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure cstrlen [2021-10-15 19:20:34,518 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2021-10-15 19:20:34,518 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __uint32_identity [2021-10-15 19:20:34,522 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 12 nodes and edges [2021-10-15 19:20:34,522 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2021-10-15 19:20:34,522 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-15 19:20:34,522 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-15 19:20:34,551 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afaf3b46-2340-4a26-971c-c4017b245533/bin/uautomizer-hJ6jxDFKc3/witness.graphml [2021-10-15 19:20:34,551 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-15 19:20:34,552 INFO L168 Benchmark]: Toolchain (without parser) took 26340.48 ms. Allocated memory was 90.2 MB in the beginning and 172.0 MB in the end (delta: 81.8 MB). Free memory was 57.4 MB in the beginning and 99.0 MB in the end (delta: -41.5 MB). Peak memory consumption was 40.3 MB. Max. memory is 16.1 GB. [2021-10-15 19:20:34,553 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 90.2 MB. Free memory is still 42.9 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 19:20:34,553 INFO L168 Benchmark]: CACSL2BoogieTranslator took 490.16 ms. Allocated memory was 90.2 MB in the beginning and 117.4 MB in the end (delta: 27.3 MB). Free memory was 57.2 MB in the beginning and 88.1 MB in the end (delta: -30.9 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-10-15 19:20:34,554 INFO L168 Benchmark]: Boogie Preprocessor took 50.74 ms. Allocated memory is still 117.4 MB. Free memory was 88.1 MB in the beginning and 85.7 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-15 19:20:34,554 INFO L168 Benchmark]: RCFGBuilder took 556.68 ms. Allocated memory is still 117.4 MB. Free memory was 85.7 MB in the beginning and 67.7 MB in the end (delta: 18.0 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. [2021-10-15 19:20:34,555 INFO L168 Benchmark]: TraceAbstraction took 25180.26 ms. Allocated memory was 117.4 MB in the beginning and 172.0 MB in the end (delta: 54.5 MB). Free memory was 67.3 MB in the beginning and 102.5 MB in the end (delta: -35.2 MB). Peak memory consumption was 22.1 MB. Max. memory is 16.1 GB. [2021-10-15 19:20:34,555 INFO L168 Benchmark]: Witness Printer took 45.30 ms. Allocated memory is still 172.0 MB. Free memory was 102.5 MB in the beginning and 99.0 MB in the end (delta: 3.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-15 19:20:34,557 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 90.2 MB. Free memory is still 42.9 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 490.16 ms. Allocated memory was 90.2 MB in the beginning and 117.4 MB in the end (delta: 27.3 MB). Free memory was 57.2 MB in the beginning and 88.1 MB in the end (delta: -30.9 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 50.74 ms. Allocated memory is still 117.4 MB. Free memory was 88.1 MB in the beginning and 85.7 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 556.68 ms. Allocated memory is still 117.4 MB. Free memory was 85.7 MB in the beginning and 67.7 MB in the end (delta: 18.0 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. * TraceAbstraction took 25180.26 ms. Allocated memory was 117.4 MB in the beginning and 172.0 MB in the end (delta: 54.5 MB). Free memory was 67.3 MB in the beginning and 102.5 MB in the end (delta: -35.2 MB). Peak memory consumption was 22.1 MB. Max. memory is 16.1 GB. * Witness Printer took 45.30 ms. Allocated memory is still 172.0 MB. Free memory was 102.5 MB in the beginning and 99.0 MB in the end (delta: 3.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms 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: 516]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 516]: 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, 47 locations, 7 error locations. Started 1 CEGAR loops. OverallTime: 25128.3ms, OverallIterations: 19, TraceHistogramMax: 7, EmptinessCheckTime: 26.4ms, AutomataDifference: 11326.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 10.0ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 284 SDtfs, 741 SDslu, 1424 SDs, 0 SdLazy, 5181 SolverSat, 265 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 5353.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 671 GetRequests, 259 SyntacticMatches, 4 SemanticMatches, 408 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2173 ImplicationChecksByTransitivity, 8911.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=52occurred in iteration=18, InterpolantAutomatonStates: 246, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 119.0ms AutomataMinimizationTime, 19 MinimizatonAttempts, 62 StatesRemovedByMinimization, 14 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 96.8ms SsaConstructionTime, 499.8ms SatisfiabilityAnalysisTime, 9013.6ms InterpolantComputationTime, 749 NumberOfCodeBlocks, 745 NumberOfCodeBlocksAsserted, 49 NumberOfCheckSat, 720 ConstructedInterpolants, 52 QuantifiedInterpolants, 5638 SizeOfPredicates, 76 NumberOfNonLiveVariables, 1365 ConjunctsInSsa, 326 ConjunctsInUnsatCore, 29 InterpolantComputations, 9 PerfectInterpolantSequences, 212/746 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! [2021-10-15 19:20:34,604 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afaf3b46-2340-4a26-971c-c4017b245533/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...