./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 b2eff8ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb13162f-7ac5-41f0-9c58-8cfb946adbe3/bin/uautomizer-GMMbpWq8iD/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb13162f-7ac5-41f0-9c58-8cfb946adbe3/bin/uautomizer-GMMbpWq8iD/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb13162f-7ac5-41f0-9c58-8cfb946adbe3/bin/uautomizer-GMMbpWq8iD/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb13162f-7ac5-41f0-9c58-8cfb946adbe3/bin/uautomizer-GMMbpWq8iD/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/cstrlen-alloca-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb13162f-7ac5-41f0-9c58-8cfb946adbe3/bin/uautomizer-GMMbpWq8iD/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb13162f-7ac5-41f0-9c58-8cfb946adbe3/bin/uautomizer-GMMbpWq8iD --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 2b1ee78e0ef345a64f8c7caca77413516ce68186d78e333a5564d6417b0fa920 .......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-b2eff8b [2021-10-28 23:56:12,887 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-28 23:56:12,890 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-28 23:56:12,957 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-28 23:56:12,960 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-28 23:56:12,966 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-28 23:56:12,970 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-28 23:56:12,975 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-28 23:56:12,979 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-28 23:56:12,988 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-28 23:56:12,990 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-28 23:56:12,992 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-28 23:56:12,993 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-28 23:56:12,997 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-28 23:56:13,000 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-28 23:56:13,008 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-28 23:56:13,012 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-28 23:56:13,014 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-28 23:56:13,016 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-28 23:56:13,021 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-28 23:56:13,028 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-28 23:56:13,030 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-28 23:56:13,032 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-28 23:56:13,033 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-28 23:56:13,036 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-28 23:56:13,037 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-28 23:56:13,037 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-28 23:56:13,039 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-28 23:56:13,039 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-28 23:56:13,041 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-28 23:56:13,041 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-28 23:56:13,042 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-28 23:56:13,043 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-28 23:56:13,044 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-28 23:56:13,045 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-28 23:56:13,046 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-28 23:56:13,047 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-28 23:56:13,047 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-28 23:56:13,047 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-28 23:56:13,048 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-28 23:56:13,049 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-28 23:56:13,050 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb13162f-7ac5-41f0-9c58-8cfb946adbe3/bin/uautomizer-GMMbpWq8iD/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-10-28 23:56:13,079 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-28 23:56:13,079 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-28 23:56:13,079 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-28 23:56:13,080 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-28 23:56:13,081 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-28 23:56:13,081 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-28 23:56:13,081 INFO L138 SettingsManager]: * Use SBE=true [2021-10-28 23:56:13,082 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-28 23:56:13,082 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-28 23:56:13,082 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-28 23:56:13,082 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-28 23:56:13,083 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-28 23:56:13,083 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-28 23:56:13,083 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-28 23:56:13,083 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-28 23:56:13,083 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-28 23:56:13,084 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-28 23:56:13,084 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-28 23:56:13,084 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-28 23:56:13,084 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-28 23:56:13,085 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-28 23:56:13,085 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-28 23:56:13,085 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-28 23:56:13,085 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 23:56:13,086 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-28 23:56:13,086 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-28 23:56:13,086 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-28 23:56:13,086 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-28 23:56:13,086 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-28 23:56:13,087 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_bb13162f-7ac5-41f0-9c58-8cfb946adbe3/bin/uautomizer-GMMbpWq8iD/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb13162f-7ac5-41f0-9c58-8cfb946adbe3/bin/uautomizer-GMMbpWq8iD Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2b1ee78e0ef345a64f8c7caca77413516ce68186d78e333a5564d6417b0fa920 [2021-10-28 23:56:13,401 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-28 23:56:13,425 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-28 23:56:13,428 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-28 23:56:13,430 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-28 23:56:13,431 INFO L275 PluginConnector]: CDTParser initialized [2021-10-28 23:56:13,432 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb13162f-7ac5-41f0-9c58-8cfb946adbe3/bin/uautomizer-GMMbpWq8iD/../../sv-benchmarks/c/array-memsafety/cstrlen-alloca-2.i [2021-10-28 23:56:13,518 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb13162f-7ac5-41f0-9c58-8cfb946adbe3/bin/uautomizer-GMMbpWq8iD/data/d01786e49/a29a90f0d2774801afc68b216ea92134/FLAG2516f9daf [2021-10-28 23:56:14,135 INFO L306 CDTParser]: Found 1 translation units. [2021-10-28 23:56:14,136 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb13162f-7ac5-41f0-9c58-8cfb946adbe3/sv-benchmarks/c/array-memsafety/cstrlen-alloca-2.i [2021-10-28 23:56:14,150 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb13162f-7ac5-41f0-9c58-8cfb946adbe3/bin/uautomizer-GMMbpWq8iD/data/d01786e49/a29a90f0d2774801afc68b216ea92134/FLAG2516f9daf [2021-10-28 23:56:14,381 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb13162f-7ac5-41f0-9c58-8cfb946adbe3/bin/uautomizer-GMMbpWq8iD/data/d01786e49/a29a90f0d2774801afc68b216ea92134 [2021-10-28 23:56:14,384 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-28 23:56:14,386 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-10-28 23:56:14,388 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-28 23:56:14,388 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-28 23:56:14,394 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-28 23:56:14,394 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 11:56:14" (1/1) ... [2021-10-28 23:56:14,396 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d1ea4ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:56:14, skipping insertion in model container [2021-10-28 23:56:14,402 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 11:56:14" (1/1) ... [2021-10-28 23:56:14,408 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-28 23:56:14,452 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-28 23:56:14,914 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 23:56:14,928 INFO L203 MainTranslator]: Completed pre-run [2021-10-28 23:56:14,984 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 23:56:15,018 INFO L208 MainTranslator]: Completed translation [2021-10-28 23:56:15,019 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:56:15 WrapperNode [2021-10-28 23:56:15,019 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-28 23:56:15,021 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-28 23:56:15,021 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-28 23:56:15,021 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-28 23:56:15,034 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:56:15" (1/1) ... [2021-10-28 23:56:15,036 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:56:15" (1/1) ... [2021-10-28 23:56:15,064 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:56:15" (1/1) ... [2021-10-28 23:56:15,064 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:56:15" (1/1) ... [2021-10-28 23:56:15,089 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:56:15" (1/1) ... [2021-10-28 23:56:15,105 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:56:15" (1/1) ... [2021-10-28 23:56:15,109 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:56:15" (1/1) ... [2021-10-28 23:56:15,115 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-28 23:56:15,116 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-28 23:56:15,116 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-28 23:56:15,116 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-28 23:56:15,125 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:56:15" (1/1) ... [2021-10-28 23:56:15,139 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 23:56:15,151 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb13162f-7ac5-41f0-9c58-8cfb946adbe3/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:56:15,164 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb13162f-7ac5-41f0-9c58-8cfb946adbe3/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-28 23:56:15,181 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb13162f-7ac5-41f0-9c58-8cfb946adbe3/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-28 23:56:15,216 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-10-28 23:56:15,217 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-28 23:56:15,217 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-10-28 23:56:15,217 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-10-28 23:56:15,217 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2021-10-28 23:56:15,218 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2021-10-28 23:56:15,218 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2021-10-28 23:56:15,218 INFO L138 BoogieDeclarations]: Found implementation of procedure cstrlen [2021-10-28 23:56:15,218 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-10-28 23:56:15,218 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-10-28 23:56:15,219 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-10-28 23:56:15,219 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-10-28 23:56:15,219 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-10-28 23:56:15,219 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-10-28 23:56:15,219 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-10-28 23:56:15,220 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-10-28 23:56:15,220 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-10-28 23:56:15,220 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-10-28 23:56:15,220 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-10-28 23:56:15,220 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-10-28 23:56:15,221 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-10-28 23:56:15,221 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-10-28 23:56:15,221 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-10-28 23:56:15,221 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-10-28 23:56:15,221 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-10-28 23:56:15,222 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-10-28 23:56:15,222 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-10-28 23:56:15,222 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2021-10-28 23:56:15,222 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2021-10-28 23:56:15,222 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2021-10-28 23:56:15,223 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-10-28 23:56:15,223 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-10-28 23:56:15,223 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-10-28 23:56:15,223 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-10-28 23:56:15,223 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-10-28 23:56:15,224 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-10-28 23:56:15,224 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-10-28 23:56:15,224 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-10-28 23:56:15,224 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-10-28 23:56:15,224 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-10-28 23:56:15,224 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-10-28 23:56:15,225 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-10-28 23:56:15,225 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-10-28 23:56:15,225 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-10-28 23:56:15,225 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-10-28 23:56:15,225 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-10-28 23:56:15,226 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-10-28 23:56:15,226 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-10-28 23:56:15,226 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-10-28 23:56:15,226 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-10-28 23:56:15,226 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-10-28 23:56:15,227 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-10-28 23:56:15,227 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-10-28 23:56:15,227 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-10-28 23:56:15,227 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-10-28 23:56:15,227 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-10-28 23:56:15,228 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-10-28 23:56:15,228 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-10-28 23:56:15,228 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-10-28 23:56:15,228 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-10-28 23:56:15,228 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-10-28 23:56:15,229 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-10-28 23:56:15,229 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-10-28 23:56:15,229 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-10-28 23:56:15,229 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-10-28 23:56:15,229 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-10-28 23:56:15,230 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-10-28 23:56:15,230 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-10-28 23:56:15,230 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-10-28 23:56:15,230 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-10-28 23:56:15,230 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-10-28 23:56:15,231 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-10-28 23:56:15,231 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-10-28 23:56:15,231 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-10-28 23:56:15,231 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-10-28 23:56:15,231 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-10-28 23:56:15,232 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-10-28 23:56:15,232 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-10-28 23:56:15,232 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-10-28 23:56:15,232 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-10-28 23:56:15,232 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-10-28 23:56:15,233 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-10-28 23:56:15,233 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-10-28 23:56:15,233 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-10-28 23:56:15,233 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-10-28 23:56:15,233 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-10-28 23:56:15,234 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-10-28 23:56:15,234 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-10-28 23:56:15,234 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-10-28 23:56:15,234 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-10-28 23:56:15,234 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-10-28 23:56:15,235 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-10-28 23:56:15,235 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-10-28 23:56:15,235 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-10-28 23:56:15,235 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-10-28 23:56:15,235 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-10-28 23:56:15,235 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-10-28 23:56:15,236 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-10-28 23:56:15,236 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-10-28 23:56:15,236 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-10-28 23:56:15,236 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-10-28 23:56:15,236 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-10-28 23:56:15,237 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-10-28 23:56:15,237 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-10-28 23:56:15,237 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-10-28 23:56:15,237 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-10-28 23:56:15,237 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-10-28 23:56:15,238 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-10-28 23:56:15,238 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-10-28 23:56:15,238 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-10-28 23:56:15,238 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-10-28 23:56:15,238 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-10-28 23:56:15,239 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-10-28 23:56:15,239 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-10-28 23:56:15,239 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-10-28 23:56:15,239 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-10-28 23:56:15,239 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-10-28 23:56:15,239 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2021-10-28 23:56:15,240 INFO L130 BoogieDeclarations]: Found specification of procedure cstrlen [2021-10-28 23:56:15,240 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-28 23:56:15,240 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-10-28 23:56:15,240 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-28 23:56:15,240 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-28 23:56:15,241 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-28 23:56:15,241 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-10-28 23:56:15,241 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-28 23:56:15,748 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-28 23:56:15,748 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-10-28 23:56:15,751 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 11:56:15 BoogieIcfgContainer [2021-10-28 23:56:15,751 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-28 23:56:15,753 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-28 23:56:15,754 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-28 23:56:15,761 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-28 23:56:15,761 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 11:56:14" (1/3) ... [2021-10-28 23:56:15,762 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53272776 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 11:56:15, skipping insertion in model container [2021-10-28 23:56:15,762 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:56:15" (2/3) ... [2021-10-28 23:56:15,763 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53272776 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 11:56:15, skipping insertion in model container [2021-10-28 23:56:15,763 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 11:56:15" (3/3) ... [2021-10-28 23:56:15,764 INFO L111 eAbstractionObserver]: Analyzing ICFG cstrlen-alloca-2.i [2021-10-28 23:56:15,771 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-28 23:56:15,771 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 7 error locations. [2021-10-28 23:56:15,827 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-28 23:56:15,835 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-28 23:56:15,835 INFO L340 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2021-10-28 23:56:15,853 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) [2021-10-28 23:56:15,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-28 23:56:15,863 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:56:15,864 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:56:15,865 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr2REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 2 more)] === [2021-10-28 23:56:15,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:56:15,872 INFO L85 PathProgramCache]: Analyzing trace with hash 1480341813, now seen corresponding path program 1 times [2021-10-28 23:56:15,883 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:56:15,884 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730522209] [2021-10-28 23:56:15,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:56:15,885 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:56:16,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:56:16,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:56:16,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:56:16,122 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:56:16,122 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:56:16,123 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730522209] [2021-10-28 23:56:16,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730522209] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:56:16,124 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:56:16,124 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-28 23:56:16,127 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602048337] [2021-10-28 23:56:16,132 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 23:56:16,133 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:56:16,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 23:56:16,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 23:56:16,153 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) [2021-10-28 23:56:16,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:56:16,253 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2021-10-28 23:56:16,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 23:56:16,256 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 [2021-10-28 23:56:16,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:56:16,265 INFO L225 Difference]: With dead ends: 30 [2021-10-28 23:56:16,266 INFO L226 Difference]: Without dead ends: 27 [2021-10-28 23:56:16,268 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 23:56:16,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-10-28 23:56:16,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-10-28 23:56:16,320 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) [2021-10-28 23:56:16,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2021-10-28 23:56:16,324 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 10 [2021-10-28 23:56:16,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:56:16,325 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2021-10-28 23:56:16,325 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) [2021-10-28 23:56:16,326 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2021-10-28 23:56:16,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-28 23:56:16,327 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:56:16,327 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:56:16,328 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-28 23:56:16,329 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 2 more)] === [2021-10-28 23:56:16,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:56:16,330 INFO L85 PathProgramCache]: Analyzing trace with hash 1480341814, now seen corresponding path program 1 times [2021-10-28 23:56:16,330 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:56:16,331 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050230259] [2021-10-28 23:56:16,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:56:16,331 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:56:16,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:56:16,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:56:16,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:56:16,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:56:16,527 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:56:16,527 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050230259] [2021-10-28 23:56:16,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050230259] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:56:16,527 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:56:16,528 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-28 23:56:16,528 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152141634] [2021-10-28 23:56:16,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-28 23:56:16,530 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:56:16,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-28 23:56:16,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-28 23:56:16,532 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) [2021-10-28 23:56:16,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:56:16,629 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2021-10-28 23:56:16,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-28 23:56:16,629 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 [2021-10-28 23:56:16,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:56:16,630 INFO L225 Difference]: With dead ends: 26 [2021-10-28 23:56:16,631 INFO L226 Difference]: Without dead ends: 26 [2021-10-28 23:56:16,632 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-28 23:56:16,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-10-28 23:56:16,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-10-28 23:56:16,639 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) [2021-10-28 23:56:16,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2021-10-28 23:56:16,641 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 10 [2021-10-28 23:56:16,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:56:16,643 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2021-10-28 23:56:16,643 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) [2021-10-28 23:56:16,643 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2021-10-28 23:56:16,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-28 23:56:16,644 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:56:16,644 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:56:16,644 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-28 23:56:16,645 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 2 more)] === [2021-10-28 23:56:16,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:56:16,646 INFO L85 PathProgramCache]: Analyzing trace with hash 1480341867, now seen corresponding path program 1 times [2021-10-28 23:56:16,647 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:56:16,647 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289554451] [2021-10-28 23:56:16,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:56:16,648 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:56:16,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:56:16,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:56:16,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:56:16,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:56:16,751 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:56:16,751 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289554451] [2021-10-28 23:56:16,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289554451] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:56:16,752 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:56:16,752 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-28 23:56:16,752 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056882019] [2021-10-28 23:56:16,753 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-28 23:56:16,753 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:56:16,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-28 23:56:16,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-28 23:56:16,755 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) [2021-10-28 23:56:16,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:56:16,843 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2021-10-28 23:56:16,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-28 23:56:16,844 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 [2021-10-28 23:56:16,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:56:16,846 INFO L225 Difference]: With dead ends: 33 [2021-10-28 23:56:16,847 INFO L226 Difference]: Without dead ends: 33 [2021-10-28 23:56:16,847 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-28 23:56:16,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-10-28 23:56:16,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 28. [2021-10-28 23:56:16,856 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) [2021-10-28 23:56:16,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2021-10-28 23:56:16,857 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 10 [2021-10-28 23:56:16,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:56:16,858 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2021-10-28 23:56:16,858 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) [2021-10-28 23:56:16,859 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2021-10-28 23:56:16,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-28 23:56:16,860 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:56:16,860 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:56:16,860 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-28 23:56:16,861 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 2 more)] === [2021-10-28 23:56:16,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:56:16,862 INFO L85 PathProgramCache]: Analyzing trace with hash 1480401449, now seen corresponding path program 1 times [2021-10-28 23:56:16,862 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:56:16,862 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58775796] [2021-10-28 23:56:16,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:56:16,863 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:56:16,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:56:17,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:56:17,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:56:17,039 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:56:17,040 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:56:17,040 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58775796] [2021-10-28 23:56:17,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58775796] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:56:17,041 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:56:17,042 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-28 23:56:17,042 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350561481] [2021-10-28 23:56:17,044 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-28 23:56:17,044 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:56:17,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-28 23:56:17,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-28 23:56:17,047 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) [2021-10-28 23:56:17,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:56:17,174 INFO L93 Difference]: Finished difference Result 37 states and 40 transitions. [2021-10-28 23:56:17,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-28 23:56:17,175 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 [2021-10-28 23:56:17,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:56:17,178 INFO L225 Difference]: With dead ends: 37 [2021-10-28 23:56:17,178 INFO L226 Difference]: Without dead ends: 37 [2021-10-28 23:56:17,179 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-10-28 23:56:17,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-10-28 23:56:17,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 30. [2021-10-28 23:56:17,190 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) [2021-10-28 23:56:17,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2021-10-28 23:56:17,194 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 10 [2021-10-28 23:56:17,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:56:17,195 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2021-10-28 23:56:17,196 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) [2021-10-28 23:56:17,196 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2021-10-28 23:56:17,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-28 23:56:17,200 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:56:17,200 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:56:17,200 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-28 23:56:17,203 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting cstrlenErr0REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 2 more)] === [2021-10-28 23:56:17,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:56:17,204 INFO L85 PathProgramCache]: Analyzing trace with hash 138789715, now seen corresponding path program 1 times [2021-10-28 23:56:17,204 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:56:17,204 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059579441] [2021-10-28 23:56:17,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:56:17,205 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:56:17,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:56:17,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:56:17,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:56:17,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:56:17,312 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:56:17,313 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059579441] [2021-10-28 23:56:17,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059579441] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:56:17,313 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:56:17,313 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-28 23:56:17,313 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75982305] [2021-10-28 23:56:17,314 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-28 23:56:17,314 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:56:17,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-28 23:56:17,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-28 23:56:17,315 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) [2021-10-28 23:56:17,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:56:17,398 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2021-10-28 23:56:17,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-28 23:56:17,399 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 [2021-10-28 23:56:17,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:56:17,400 INFO L225 Difference]: With dead ends: 29 [2021-10-28 23:56:17,400 INFO L226 Difference]: Without dead ends: 29 [2021-10-28 23:56:17,400 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-10-28 23:56:17,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-10-28 23:56:17,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-10-28 23:56:17,403 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) [2021-10-28 23:56:17,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2021-10-28 23:56:17,404 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 13 [2021-10-28 23:56:17,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:56:17,405 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2021-10-28 23:56:17,405 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) [2021-10-28 23:56:17,405 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2021-10-28 23:56:17,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-28 23:56:17,406 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:56:17,406 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:56:17,406 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-28 23:56:17,406 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting cstrlenErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 2 more)] === [2021-10-28 23:56:17,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:56:17,407 INFO L85 PathProgramCache]: Analyzing trace with hash 138789716, now seen corresponding path program 1 times [2021-10-28 23:56:17,407 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:56:17,407 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669353470] [2021-10-28 23:56:17,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:56:17,408 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:56:17,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:56:17,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:56:17,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:56:17,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:56:17,603 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:56:17,604 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669353470] [2021-10-28 23:56:17,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669353470] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:56:17,604 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:56:17,605 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-10-28 23:56:17,605 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052557504] [2021-10-28 23:56:17,605 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-28 23:56:17,606 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:56:17,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-28 23:56:17,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-10-28 23:56:17,607 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) [2021-10-28 23:56:17,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:56:17,761 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2021-10-28 23:56:17,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-28 23:56:17,768 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 [2021-10-28 23:56:17,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:56:17,769 INFO L225 Difference]: With dead ends: 34 [2021-10-28 23:56:17,770 INFO L226 Difference]: Without dead ends: 34 [2021-10-28 23:56:17,770 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-10-28 23:56:17,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-10-28 23:56:17,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 30. [2021-10-28 23:56:17,777 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) [2021-10-28 23:56:17,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2021-10-28 23:56:17,778 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 13 [2021-10-28 23:56:17,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:56:17,782 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2021-10-28 23:56:17,782 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) [2021-10-28 23:56:17,782 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2021-10-28 23:56:17,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-28 23:56:17,783 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:56:17,783 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:56:17,784 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-28 23:56:17,784 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting cstrlenErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 2 more)] === [2021-10-28 23:56:17,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:56:17,786 INFO L85 PathProgramCache]: Analyzing trace with hash 232930637, now seen corresponding path program 1 times [2021-10-28 23:56:17,787 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:56:17,787 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139026567] [2021-10-28 23:56:17,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:56:17,788 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:56:17,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:56:17,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:56:17,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:56:18,007 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:56:18,008 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:56:18,008 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139026567] [2021-10-28 23:56:18,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139026567] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:56:18,009 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:56:18,009 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-10-28 23:56:18,009 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251165157] [2021-10-28 23:56:18,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-28 23:56:18,011 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:56:18,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-28 23:56:18,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-10-28 23:56:18,014 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) [2021-10-28 23:56:18,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:56:18,244 INFO L93 Difference]: Finished difference Result 41 states and 43 transitions. [2021-10-28 23:56:18,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-28 23:56:18,244 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 [2021-10-28 23:56:18,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:56:18,248 INFO L225 Difference]: With dead ends: 41 [2021-10-28 23:56:18,248 INFO L226 Difference]: Without dead ends: 41 [2021-10-28 23:56:18,253 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-10-28 23:56:18,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-10-28 23:56:18,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 38. [2021-10-28 23:56:18,257 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) [2021-10-28 23:56:18,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2021-10-28 23:56:18,258 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 15 [2021-10-28 23:56:18,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:56:18,259 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2021-10-28 23:56:18,259 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) [2021-10-28 23:56:18,260 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2021-10-28 23:56:18,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-28 23:56:18,260 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:56:18,261 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:56:18,261 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-28 23:56:18,261 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting cstrlenErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 2 more)] === [2021-10-28 23:56:18,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:56:18,262 INFO L85 PathProgramCache]: Analyzing trace with hash 912989007, now seen corresponding path program 1 times [2021-10-28 23:56:18,262 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:56:18,262 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709349685] [2021-10-28 23:56:18,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:56:18,263 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:56:18,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:56:18,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:56:18,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:56:18,451 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:56:18,454 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:56:18,454 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709349685] [2021-10-28 23:56:18,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709349685] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:56:18,454 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:56:18,455 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-28 23:56:18,455 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337368514] [2021-10-28 23:56:18,455 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-28 23:56:18,455 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:56:18,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-28 23:56:18,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-10-28 23:56:18,459 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) [2021-10-28 23:56:18,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:56:18,655 INFO L93 Difference]: Finished difference Result 51 states and 53 transitions. [2021-10-28 23:56:18,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-28 23:56:18,655 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 [2021-10-28 23:56:18,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:56:18,660 INFO L225 Difference]: With dead ends: 51 [2021-10-28 23:56:18,660 INFO L226 Difference]: Without dead ends: 51 [2021-10-28 23:56:18,662 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-10-28 23:56:18,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-10-28 23:56:18,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 38. [2021-10-28 23:56:18,676 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) [2021-10-28 23:56:18,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2021-10-28 23:56:18,680 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 15 [2021-10-28 23:56:18,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:56:18,681 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2021-10-28 23:56:18,681 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) [2021-10-28 23:56:18,681 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2021-10-28 23:56:18,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-28 23:56:18,683 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:56:18,683 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:56:18,684 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-28 23:56:18,684 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 2 more)] === [2021-10-28 23:56:18,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:56:18,685 INFO L85 PathProgramCache]: Analyzing trace with hash -754029460, now seen corresponding path program 1 times [2021-10-28 23:56:18,685 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:56:18,685 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110968118] [2021-10-28 23:56:18,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:56:18,686 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:56:18,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:56:18,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:56:18,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:56:18,849 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:56:18,850 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:56:18,850 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110968118] [2021-10-28 23:56:18,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110968118] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:56:18,851 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548386966] [2021-10-28 23:56:18,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:56:18,851 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:56:18,852 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb13162f-7ac5-41f0-9c58-8cfb946adbe3/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:56:18,855 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb13162f-7ac5-41f0-9c58-8cfb946adbe3/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:56:18,882 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb13162f-7ac5-41f0-9c58-8cfb946adbe3/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-28 23:56:18,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:56:19,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-28 23:56:19,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:56:19,206 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 [2021-10-28 23:56:19,324 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:56:19,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1548386966] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:56:19,324 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:56:19,325 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2021-10-28 23:56:19,325 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539769696] [2021-10-28 23:56:19,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-28 23:56:19,326 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:56:19,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-28 23:56:19,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-10-28 23:56:19,327 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) [2021-10-28 23:56:19,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:56:19,442 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2021-10-28 23:56:19,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-28 23:56:19,442 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 [2021-10-28 23:56:19,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:56:19,443 INFO L225 Difference]: With dead ends: 42 [2021-10-28 23:56:19,444 INFO L226 Difference]: Without dead ends: 42 [2021-10-28 23:56:19,444 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-10-28 23:56:19,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-10-28 23:56:19,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 36. [2021-10-28 23:56:19,453 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) [2021-10-28 23:56:19,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2021-10-28 23:56:19,454 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 14 [2021-10-28 23:56:19,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:56:19,455 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2021-10-28 23:56:19,457 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) [2021-10-28 23:56:19,457 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2021-10-28 23:56:19,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-28 23:56:19,458 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:56:19,458 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:56:19,498 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb13162f-7ac5-41f0-9c58-8cfb946adbe3/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-28 23:56:19,682 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb13162f-7ac5-41f0-9c58-8cfb946adbe3/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-10-28 23:56:19,682 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr4ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 2 more)] === [2021-10-28 23:56:19,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:56:19,683 INFO L85 PathProgramCache]: Analyzing trace with hash -1444358493, now seen corresponding path program 1 times [2021-10-28 23:56:19,683 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:56:19,683 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431501885] [2021-10-28 23:56:19,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:56:19,683 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:56:19,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:56:19,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:56:19,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:56:19,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-10-28 23:56:19,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:56:19,772 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:56:19,773 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:56:19,773 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431501885] [2021-10-28 23:56:19,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431501885] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:56:19,773 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:56:19,774 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-28 23:56:19,774 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091005944] [2021-10-28 23:56:19,774 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-28 23:56:19,775 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:56:19,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-28 23:56:19,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-28 23:56:19,776 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) [2021-10-28 23:56:19,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:56:19,811 INFO L93 Difference]: Finished difference Result 35 states and 38 transitions. [2021-10-28 23:56:19,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 23:56:19,811 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 [2021-10-28 23:56:19,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:56:19,812 INFO L225 Difference]: With dead ends: 35 [2021-10-28 23:56:19,812 INFO L226 Difference]: Without dead ends: 20 [2021-10-28 23:56:19,813 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-28 23:56:19,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-10-28 23:56:19,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-10-28 23:56:19,815 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) [2021-10-28 23:56:19,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2021-10-28 23:56:19,816 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 19 [2021-10-28 23:56:19,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:56:19,816 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2021-10-28 23:56:19,816 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) [2021-10-28 23:56:19,817 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2021-10-28 23:56:19,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-28 23:56:19,817 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:56:19,818 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:56:19,818 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-10-28 23:56:19,818 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting cstrlenErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 2 more)] === [2021-10-28 23:56:19,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:56:19,819 INFO L85 PathProgramCache]: Analyzing trace with hash -1892891924, now seen corresponding path program 1 times [2021-10-28 23:56:19,819 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:56:19,819 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069031445] [2021-10-28 23:56:19,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:56:19,820 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:56:19,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:56:19,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:56:19,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:56:19,983 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:56:19,984 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:56:19,984 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069031445] [2021-10-28 23:56:19,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069031445] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:56:19,984 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607729740] [2021-10-28 23:56:19,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:56:19,985 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:56:19,985 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb13162f-7ac5-41f0-9c58-8cfb946adbe3/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:56:19,986 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb13162f-7ac5-41f0-9c58-8cfb946adbe3/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:56:20,006 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb13162f-7ac5-41f0-9c58-8cfb946adbe3/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-28 23:56:20,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:56:20,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-28 23:56:20,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:56:20,340 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:56:20,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1607729740] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:56:20,340 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:56:20,341 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 15 [2021-10-28 23:56:20,341 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326598670] [2021-10-28 23:56:20,341 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-28 23:56:20,342 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:56:20,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-28 23:56:20,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-10-28 23:56:20,343 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) [2021-10-28 23:56:20,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:56:20,537 INFO L93 Difference]: Finished difference Result 26 states and 27 transitions. [2021-10-28 23:56:20,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-28 23:56:20,540 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 [2021-10-28 23:56:20,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:56:20,541 INFO L225 Difference]: With dead ends: 26 [2021-10-28 23:56:20,541 INFO L226 Difference]: Without dead ends: 26 [2021-10-28 23:56:20,542 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2021-10-28 23:56:20,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-10-28 23:56:20,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 22. [2021-10-28 23:56:20,543 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) [2021-10-28 23:56:20,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2021-10-28 23:56:20,544 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 19 [2021-10-28 23:56:20,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:56:20,544 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2021-10-28 23:56:20,544 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) [2021-10-28 23:56:20,545 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2021-10-28 23:56:20,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-28 23:56:20,545 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:56:20,545 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:56:20,584 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb13162f-7ac5-41f0-9c58-8cfb946adbe3/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-28 23:56:20,757 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb13162f-7ac5-41f0-9c58-8cfb946adbe3/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-10-28 23:56:20,758 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting cstrlenErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 2 more)] === [2021-10-28 23:56:20,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:56:20,758 INFO L85 PathProgramCache]: Analyzing trace with hash 1996994277, now seen corresponding path program 2 times [2021-10-28 23:56:20,758 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:56:20,759 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696572914] [2021-10-28 23:56:20,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:56:20,759 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:56:20,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:56:21,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:56:21,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:56:21,091 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:56:21,091 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:56:21,092 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696572914] [2021-10-28 23:56:21,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696572914] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:56:21,092 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969948641] [2021-10-28 23:56:21,092 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 23:56:21,093 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:56:21,093 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb13162f-7ac5-41f0-9c58-8cfb946adbe3/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:56:21,098 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb13162f-7ac5-41f0-9c58-8cfb946adbe3/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:56:21,099 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb13162f-7ac5-41f0-9c58-8cfb946adbe3/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-28 23:56:21,248 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 23:56:21,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:56:21,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 28 conjunts are in the unsatisfiable core [2021-10-28 23:56:21,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:56:21,347 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 [2021-10-28 23:56:21,992 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-28 23:56:21,993 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 [2021-10-28 23:56:22,154 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:56:22,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1969948641] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:56:22,154 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:56:22,155 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 21 [2021-10-28 23:56:22,155 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428508493] [2021-10-28 23:56:22,156 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-10-28 23:56:22,157 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:56:22,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-28 23:56:22,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=372, Unknown=0, NotChecked=0, Total=420 [2021-10-28 23:56:22,158 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) [2021-10-28 23:56:23,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:56:23,247 INFO L93 Difference]: Finished difference Result 39 states and 40 transitions. [2021-10-28 23:56:23,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-28 23:56:23,248 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 [2021-10-28 23:56:23,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:56:23,249 INFO L225 Difference]: With dead ends: 39 [2021-10-28 23:56:23,249 INFO L226 Difference]: Without dead ends: 32 [2021-10-28 23:56:23,250 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=166, Invalid=1094, Unknown=0, NotChecked=0, Total=1260 [2021-10-28 23:56:23,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-10-28 23:56:23,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 28. [2021-10-28 23:56:23,253 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) [2021-10-28 23:56:23,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2021-10-28 23:56:23,254 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 21 [2021-10-28 23:56:23,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:56:23,254 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2021-10-28 23:56:23,254 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) [2021-10-28 23:56:23,254 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2021-10-28 23:56:23,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-28 23:56:23,255 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:56:23,255 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:56:23,304 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb13162f-7ac5-41f0-9c58-8cfb946adbe3/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-28 23:56:23,478 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb13162f-7ac5-41f0-9c58-8cfb946adbe3/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-10-28 23:56:23,478 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting cstrlenErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 2 more)] === [2021-10-28 23:56:23,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:56:23,479 INFO L85 PathProgramCache]: Analyzing trace with hash 1847085883, now seen corresponding path program 3 times [2021-10-28 23:56:23,479 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:56:23,479 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627695450] [2021-10-28 23:56:23,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:56:23,479 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:56:23,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:56:23,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:56:23,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:56:23,744 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:56:23,744 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:56:23,745 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627695450] [2021-10-28 23:56:23,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627695450] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:56:23,745 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936165171] [2021-10-28 23:56:23,745 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 23:56:23,745 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:56:23,745 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb13162f-7ac5-41f0-9c58-8cfb946adbe3/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:56:23,748 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb13162f-7ac5-41f0-9c58-8cfb946adbe3/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:56:23,786 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb13162f-7ac5-41f0-9c58-8cfb946adbe3/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-28 23:56:23,917 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-10-28 23:56:23,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:56:23,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 31 conjunts are in the unsatisfiable core [2021-10-28 23:56:23,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:56:24,145 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 [2021-10-28 23:56:24,429 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 [2021-10-28 23:56:24,435 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:56:24,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1936165171] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:56:24,436 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:56:24,436 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 22 [2021-10-28 23:56:24,437 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268897753] [2021-10-28 23:56:24,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-10-28 23:56:24,438 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:56:24,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-10-28 23:56:24,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2021-10-28 23:56:24,439 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) [2021-10-28 23:56:24,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:56:24,920 INFO L93 Difference]: Finished difference Result 44 states and 45 transitions. [2021-10-28 23:56:24,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-28 23:56:24,921 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 [2021-10-28 23:56:24,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:56:24,921 INFO L225 Difference]: With dead ends: 44 [2021-10-28 23:56:24,921 INFO L226 Difference]: Without dead ends: 35 [2021-10-28 23:56:24,922 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=111, Invalid=759, Unknown=0, NotChecked=0, Total=870 [2021-10-28 23:56:24,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-10-28 23:56:24,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2021-10-28 23:56:24,925 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) [2021-10-28 23:56:24,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2021-10-28 23:56:24,926 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 27 [2021-10-28 23:56:24,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:56:24,926 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2021-10-28 23:56:24,926 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) [2021-10-28 23:56:24,927 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2021-10-28 23:56:24,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-10-28 23:56:24,927 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:56:24,928 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:56:24,975 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb13162f-7ac5-41f0-9c58-8cfb946adbe3/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-28 23:56:25,137 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb13162f-7ac5-41f0-9c58-8cfb946adbe3/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-10-28 23:56:25,137 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting cstrlenErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 2 more)] === [2021-10-28 23:56:25,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:56:25,138 INFO L85 PathProgramCache]: Analyzing trace with hash 1827827544, now seen corresponding path program 4 times [2021-10-28 23:56:25,138 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:56:25,138 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322125515] [2021-10-28 23:56:25,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:56:25,138 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:56:25,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:56:25,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:56:25,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:56:25,375 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:56:25,375 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:56:25,376 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322125515] [2021-10-28 23:56:25,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322125515] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:56:25,376 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2002939933] [2021-10-28 23:56:25,376 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-28 23:56:25,376 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:56:25,376 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb13162f-7ac5-41f0-9c58-8cfb946adbe3/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:56:25,378 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb13162f-7ac5-41f0-9c58-8cfb946adbe3/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:56:25,401 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb13162f-7ac5-41f0-9c58-8cfb946adbe3/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-28 23:56:25,539 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-28 23:56:25,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:56:25,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 38 conjunts are in the unsatisfiable core [2021-10-28 23:56:25,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:56:25,581 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 [2021-10-28 23:56:25,804 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 [2021-10-28 23:56:26,169 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-28 23:56:26,170 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 [2021-10-28 23:56:26,278 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:56:26,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2002939933] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:56:26,279 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:56:26,279 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-10-28 23:56:26,279 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552564963] [2021-10-28 23:56:26,279 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-10-28 23:56:26,280 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:56:26,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-10-28 23:56:26,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=455, Unknown=0, NotChecked=0, Total=506 [2021-10-28 23:56:26,281 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) [2021-10-28 23:56:27,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:56:27,018 INFO L93 Difference]: Finished difference Result 35 states and 36 transitions. [2021-10-28 23:56:27,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-28 23:56:27,019 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 [2021-10-28 23:56:27,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:56:27,020 INFO L225 Difference]: With dead ends: 35 [2021-10-28 23:56:27,020 INFO L226 Difference]: Without dead ends: 35 [2021-10-28 23:56:27,021 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=124, Invalid=868, Unknown=0, NotChecked=0, Total=992 [2021-10-28 23:56:27,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-10-28 23:56:27,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2021-10-28 23:56:27,024 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) [2021-10-28 23:56:27,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2021-10-28 23:56:27,025 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 31 [2021-10-28 23:56:27,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:56:27,026 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2021-10-28 23:56:27,026 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) [2021-10-28 23:56:27,026 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2021-10-28 23:56:27,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-10-28 23:56:27,028 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:56:27,028 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:56:27,065 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb13162f-7ac5-41f0-9c58-8cfb946adbe3/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-28 23:56:27,242 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb13162f-7ac5-41f0-9c58-8cfb946adbe3/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:56:27,242 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting cstrlenErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 2 more)] === [2021-10-28 23:56:27,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:56:27,243 INFO L85 PathProgramCache]: Analyzing trace with hash -99354543, now seen corresponding path program 5 times [2021-10-28 23:56:27,243 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:56:27,243 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045675783] [2021-10-28 23:56:27,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:56:27,243 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:56:27,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:56:27,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:56:27,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:56:27,534 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:56:27,534 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:56:27,534 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045675783] [2021-10-28 23:56:27,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045675783] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:56:27,535 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329708079] [2021-10-28 23:56:27,535 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-28 23:56:27,535 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:56:27,535 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb13162f-7ac5-41f0-9c58-8cfb946adbe3/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:56:27,546 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb13162f-7ac5-41f0-9c58-8cfb946adbe3/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:56:27,570 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb13162f-7ac5-41f0-9c58-8cfb946adbe3/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-28 23:56:27,753 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-10-28 23:56:27,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:56:27,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 39 conjunts are in the unsatisfiable core [2021-10-28 23:56:27,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:56:27,990 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 [2021-10-28 23:56:28,251 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 [2021-10-28 23:56:28,257 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:56:28,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [329708079] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:56:28,258 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:56:28,258 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 25 [2021-10-28 23:56:28,259 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126021829] [2021-10-28 23:56:28,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-10-28 23:56:28,259 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:56:28,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-10-28 23:56:28,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-10-28 23:56:28,261 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) [2021-10-28 23:56:28,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:56:28,804 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2021-10-28 23:56:28,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-28 23:56:28,806 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 [2021-10-28 23:56:28,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:56:28,807 INFO L225 Difference]: With dead ends: 52 [2021-10-28 23:56:28,807 INFO L226 Difference]: Without dead ends: 41 [2021-10-28 23:56:28,808 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=125, Invalid=997, Unknown=0, NotChecked=0, Total=1122 [2021-10-28 23:56:28,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-10-28 23:56:28,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 38. [2021-10-28 23:56:28,811 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) [2021-10-28 23:56:28,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2021-10-28 23:56:28,812 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 33 [2021-10-28 23:56:28,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:56:28,812 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2021-10-28 23:56:28,812 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) [2021-10-28 23:56:28,813 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2021-10-28 23:56:28,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-10-28 23:56:28,817 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:56:28,818 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:56:28,861 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb13162f-7ac5-41f0-9c58-8cfb946adbe3/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-28 23:56:29,018 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb13162f-7ac5-41f0-9c58-8cfb946adbe3/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:56:29,018 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting cstrlenErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 2 more)] === [2021-10-28 23:56:29,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:56:29,019 INFO L85 PathProgramCache]: Analyzing trace with hash 1272435374, now seen corresponding path program 6 times [2021-10-28 23:56:29,019 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:56:29,019 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055125551] [2021-10-28 23:56:29,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:56:29,019 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:56:29,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:56:29,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:56:29,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:56:29,288 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 6 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:56:29,288 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:56:29,289 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055125551] [2021-10-28 23:56:29,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055125551] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:56:29,289 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857932520] [2021-10-28 23:56:29,289 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-28 23:56:29,290 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:56:29,290 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb13162f-7ac5-41f0-9c58-8cfb946adbe3/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:56:29,298 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb13162f-7ac5-41f0-9c58-8cfb946adbe3/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:56:29,323 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb13162f-7ac5-41f0-9c58-8cfb946adbe3/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-28 23:56:29,561 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-10-28 23:56:29,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:56:29,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 33 conjunts are in the unsatisfiable core [2021-10-28 23:56:29,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:56:29,997 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 15 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:56:29,998 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1857932520] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:56:29,998 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:56:29,998 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 27 [2021-10-28 23:56:29,998 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128282616] [2021-10-28 23:56:29,999 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-10-28 23:56:29,999 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:56:30,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-10-28 23:56:30,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=660, Unknown=0, NotChecked=0, Total=756 [2021-10-28 23:56:30,001 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) [2021-10-28 23:56:30,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:56:30,415 INFO L93 Difference]: Finished difference Result 41 states and 42 transitions. [2021-10-28 23:56:30,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-28 23:56:30,416 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 [2021-10-28 23:56:30,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:56:30,417 INFO L225 Difference]: With dead ends: 41 [2021-10-28 23:56:30,417 INFO L226 Difference]: Without dead ends: 41 [2021-10-28 23:56:30,418 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=164, Invalid=1026, Unknown=0, NotChecked=0, Total=1190 [2021-10-28 23:56:30,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-10-28 23:56:30,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2021-10-28 23:56:30,421 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) [2021-10-28 23:56:30,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2021-10-28 23:56:30,422 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 37 [2021-10-28 23:56:30,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:56:30,422 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2021-10-28 23:56:30,422 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) [2021-10-28 23:56:30,422 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2021-10-28 23:56:30,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-10-28 23:56:30,423 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:56:30,424 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:56:30,482 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb13162f-7ac5-41f0-9c58-8cfb946adbe3/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-28 23:56:30,650 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb13162f-7ac5-41f0-9c58-8cfb946adbe3/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-10-28 23:56:30,650 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting cstrlenErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 2 more)] === [2021-10-28 23:56:30,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:56:30,650 INFO L85 PathProgramCache]: Analyzing trace with hash -1255285209, now seen corresponding path program 7 times [2021-10-28 23:56:30,651 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:56:30,651 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685332281] [2021-10-28 23:56:30,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:56:30,651 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:56:30,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:56:31,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:56:31,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:56:31,023 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 5 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:56:31,024 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:56:31,024 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685332281] [2021-10-28 23:56:31,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685332281] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:56:31,024 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962380405] [2021-10-28 23:56:31,024 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-28 23:56:31,024 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:56:31,025 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb13162f-7ac5-41f0-9c58-8cfb946adbe3/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:56:31,027 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb13162f-7ac5-41f0-9c58-8cfb946adbe3/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:56:31,038 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb13162f-7ac5-41f0-9c58-8cfb946adbe3/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-28 23:56:31,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:56:31,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 43 conjunts are in the unsatisfiable core [2021-10-28 23:56:31,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:56:31,552 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 [2021-10-28 23:56:32,554 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-28 23:56:32,555 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 [2021-10-28 23:56:32,729 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 15 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:56:32,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [962380405] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:56:32,729 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:56:32,729 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 33 [2021-10-28 23:56:32,730 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999059438] [2021-10-28 23:56:32,730 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-10-28 23:56:32,730 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:56:32,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-10-28 23:56:32,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=972, Unknown=0, NotChecked=0, Total=1056 [2021-10-28 23:56:32,732 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) [2021-10-28 23:56:35,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:56:35,477 INFO L93 Difference]: Finished difference Result 63 states and 64 transitions. [2021-10-28 23:56:35,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-10-28 23:56:35,482 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 [2021-10-28 23:56:35,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:56:35,482 INFO L225 Difference]: With dead ends: 63 [2021-10-28 23:56:35,483 INFO L226 Difference]: Without dead ends: 50 [2021-10-28 23:56:35,484 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=275, Invalid=2695, Unknown=0, NotChecked=0, Total=2970 [2021-10-28 23:56:35,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-10-28 23:56:35,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 46. [2021-10-28 23:56:35,488 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) [2021-10-28 23:56:35,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2021-10-28 23:56:35,497 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 39 [2021-10-28 23:56:35,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:56:35,498 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2021-10-28 23:56:35,498 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) [2021-10-28 23:56:35,499 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2021-10-28 23:56:35,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-10-28 23:56:35,500 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:56:35,500 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:56:35,532 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb13162f-7ac5-41f0-9c58-8cfb946adbe3/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-10-28 23:56:35,714 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb13162f-7ac5-41f0-9c58-8cfb946adbe3/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-10-28 23:56:35,714 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting cstrlenErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 2 more)] === [2021-10-28 23:56:35,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:56:35,715 INFO L85 PathProgramCache]: Analyzing trace with hash 592780477, now seen corresponding path program 8 times [2021-10-28 23:56:35,715 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:56:35,715 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746615460] [2021-10-28 23:56:35,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:56:35,715 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:56:35,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:56:36,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:56:36,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:56:36,096 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 6 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:56:36,097 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:56:36,097 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746615460] [2021-10-28 23:56:36,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746615460] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:56:36,097 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697290152] [2021-10-28 23:56:36,097 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 23:56:36,097 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:56:36,098 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb13162f-7ac5-41f0-9c58-8cfb946adbe3/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:56:36,106 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb13162f-7ac5-41f0-9c58-8cfb946adbe3/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:56:36,107 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb13162f-7ac5-41f0-9c58-8cfb946adbe3/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-10-28 23:56:36,353 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 23:56:36,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:56:36,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 48 conjunts are in the unsatisfiable core [2021-10-28 23:56:36,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:56:36,619 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 [2021-10-28 23:56:37,805 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-28 23:56:37,806 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 [2021-10-28 23:56:37,999 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 28 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:56:38,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [697290152] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:56:38,000 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:56:38,000 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 37 [2021-10-28 23:56:38,000 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093714790] [2021-10-28 23:56:38,001 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-10-28 23:56:38,001 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:56:38,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-10-28 23:56:38,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1231, Unknown=0, NotChecked=0, Total=1332 [2021-10-28 23:56:38,003 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) [2021-10-28 23:56:42,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:56:42,394 INFO L93 Difference]: Finished difference Result 71 states and 72 transitions. [2021-10-28 23:56:42,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-10-28 23:56:42,395 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 [2021-10-28 23:56:42,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:56:42,395 INFO L225 Difference]: With dead ends: 71 [2021-10-28 23:56:42,396 INFO L226 Difference]: Without dead ends: 56 [2021-10-28 23:56:42,397 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 514 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=314, Invalid=3346, Unknown=0, NotChecked=0, Total=3660 [2021-10-28 23:56:42,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-10-28 23:56:42,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 52. [2021-10-28 23:56:42,400 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) [2021-10-28 23:56:42,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2021-10-28 23:56:42,401 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 45 [2021-10-28 23:56:42,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:56:42,402 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2021-10-28 23:56:42,402 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) [2021-10-28 23:56:42,402 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2021-10-28 23:56:42,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-10-28 23:56:42,404 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:56:42,404 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:56:42,433 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb13162f-7ac5-41f0-9c58-8cfb946adbe3/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-10-28 23:56:42,614 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb13162f-7ac5-41f0-9c58-8cfb946adbe3/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-10-28 23:56:42,614 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting cstrlenErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 2 more)] === [2021-10-28 23:56:42,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:56:42,620 INFO L85 PathProgramCache]: Analyzing trace with hash -1607150573, now seen corresponding path program 9 times [2021-10-28 23:56:42,620 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:56:42,620 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820150724] [2021-10-28 23:56:42,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:56:42,621 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:56:42,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:56:43,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:56:43,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:56:43,104 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 7 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:56:43,104 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:56:43,105 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820150724] [2021-10-28 23:56:43,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820150724] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:56:43,105 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936370333] [2021-10-28 23:56:43,105 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 23:56:43,105 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:56:43,106 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb13162f-7ac5-41f0-9c58-8cfb946adbe3/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:56:43,107 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb13162f-7ac5-41f0-9c58-8cfb946adbe3/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:56:43,111 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb13162f-7ac5-41f0-9c58-8cfb946adbe3/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-10-28 23:56:43,408 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-10-28 23:56:43,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:56:43,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 35 conjunts are in the unsatisfiable core [2021-10-28 23:56:43,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:56:43,441 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 [2021-10-28 23:56:43,688 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 [2021-10-28 23:56:44,123 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-28 23:56:44,123 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 [2021-10-28 23:56:44,248 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-10-28 23:56:44,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1936370333] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:56:44,248 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:56:44,249 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 7] total 28 [2021-10-28 23:56:44,249 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993992370] [2021-10-28 23:56:44,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-10-28 23:56:44,249 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:56:44,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-10-28 23:56:44,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=702, Unknown=0, NotChecked=0, Total=756 [2021-10-28 23:56:44,251 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) [2021-10-28 23:56:46,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:56:46,172 INFO L93 Difference]: Finished difference Result 75 states and 76 transitions. [2021-10-28 23:56:46,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-10-28 23:56:46,172 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 [2021-10-28 23:56:46,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:56:46,172 INFO L225 Difference]: With dead ends: 75 [2021-10-28 23:56:46,173 INFO L226 Difference]: Without dead ends: 0 [2021-10-28 23:56:46,174 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 436 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=345, Invalid=3077, Unknown=0, NotChecked=0, Total=3422 [2021-10-28 23:56:46,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-28 23:56:46,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-28 23:56:46,174 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) [2021-10-28 23:56:46,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-28 23:56:46,174 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 51 [2021-10-28 23:56:46,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:56:46,174 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-28 23:56:46,174 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) [2021-10-28 23:56:46,175 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-28 23:56:46,175 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-28 23:56:46,176 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr0REQUIRES_VIOLATION [2021-10-28 23:56:46,177 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr1REQUIRES_VIOLATION [2021-10-28 23:56:46,177 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr2REQUIRES_VIOLATION [2021-10-28 23:56:46,177 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr3REQUIRES_VIOLATION [2021-10-28 23:56:46,177 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr4ENSURES_VIOLATIONMEMORY_LEAK [2021-10-28 23:56:46,178 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrlenErr0REQUIRES_VIOLATION [2021-10-28 23:56:46,178 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrlenErr1REQUIRES_VIOLATION [2021-10-28 23:56:46,200 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb13162f-7ac5-41f0-9c58-8cfb946adbe3/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-10-28 23:56:46,378 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb13162f-7ac5-41f0-9c58-8cfb946adbe3/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:56:46,382 INFO L731 BasicCegarLoop]: Path program histogram: [9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:56:46,384 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-28 23:56:46,387 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.10 11:56:46 BoogieIcfgContainer [2021-10-28 23:56:46,387 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-28 23:56:46,387 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-28 23:56:46,387 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-28 23:56:46,388 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-28 23:56:46,388 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 11:56:15" (3/4) ... [2021-10-28 23:56:46,392 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-28 23:56:46,403 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2021-10-28 23:56:46,403 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __bswap_32 [2021-10-28 23:56:46,403 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __bswap_64 [2021-10-28 23:56:46,404 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __uint16_identity [2021-10-28 23:56:46,404 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __uint64_identity [2021-10-28 23:56:46,404 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure cstrlen [2021-10-28 23:56:46,404 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2021-10-28 23:56:46,404 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __uint32_identity [2021-10-28 23:56:46,408 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 12 nodes and edges [2021-10-28 23:56:46,409 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2021-10-28 23:56:46,409 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-28 23:56:46,409 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-28 23:56:46,443 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb13162f-7ac5-41f0-9c58-8cfb946adbe3/bin/uautomizer-GMMbpWq8iD/witness.graphml [2021-10-28 23:56:46,444 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-28 23:56:46,445 INFO L168 Benchmark]: Toolchain (without parser) took 32058.60 ms. Allocated memory was 119.5 MB in the beginning and 153.1 MB in the end (delta: 33.6 MB). Free memory was 80.6 MB in the beginning and 65.4 MB in the end (delta: 15.2 MB). Peak memory consumption was 49.8 MB. Max. memory is 16.1 GB. [2021-10-28 23:56:46,449 INFO L168 Benchmark]: CDTParser took 0.33 ms. Allocated memory is still 119.5 MB. Free memory is still 98.0 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 23:56:46,450 INFO L168 Benchmark]: CACSL2BoogieTranslator took 631.30 ms. Allocated memory is still 119.5 MB. Free memory was 80.4 MB in the beginning and 89.2 MB in the end (delta: -8.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-28 23:56:46,450 INFO L168 Benchmark]: Boogie Preprocessor took 94.27 ms. Allocated memory is still 119.5 MB. Free memory was 89.2 MB in the beginning and 87.1 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-28 23:56:46,451 INFO L168 Benchmark]: RCFGBuilder took 635.55 ms. Allocated memory is still 119.5 MB. Free memory was 87.1 MB in the beginning and 68.8 MB in the end (delta: 18.4 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. [2021-10-28 23:56:46,451 INFO L168 Benchmark]: TraceAbstraction took 30633.44 ms. Allocated memory was 119.5 MB in the beginning and 153.1 MB in the end (delta: 33.6 MB). Free memory was 68.3 MB in the beginning and 67.4 MB in the end (delta: 851.8 kB). Peak memory consumption was 37.4 MB. Max. memory is 16.1 GB. [2021-10-28 23:56:46,452 INFO L168 Benchmark]: Witness Printer took 56.58 ms. Allocated memory is still 153.1 MB. Free memory was 67.4 MB in the beginning and 65.4 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-28 23:56:46,454 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33 ms. Allocated memory is still 119.5 MB. Free memory is still 98.0 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 631.30 ms. Allocated memory is still 119.5 MB. Free memory was 80.4 MB in the beginning and 89.2 MB in the end (delta: -8.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 94.27 ms. Allocated memory is still 119.5 MB. Free memory was 89.2 MB in the beginning and 87.1 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 635.55 ms. Allocated memory is still 119.5 MB. Free memory was 87.1 MB in the beginning and 68.8 MB in the end (delta: 18.4 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. * TraceAbstraction took 30633.44 ms. Allocated memory was 119.5 MB in the beginning and 153.1 MB in the end (delta: 33.6 MB). Free memory was 68.3 MB in the beginning and 67.4 MB in the end (delta: 851.8 kB). Peak memory consumption was 37.4 MB. Max. memory is 16.1 GB. * Witness Printer took 56.58 ms. Allocated memory is still 153.1 MB. Free memory was 67.4 MB in the beginning and 65.4 MB in the end (delta: 2.0 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, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s 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: 30.5s, OverallIterations: 19, TraceHistogramMax: 7, PathProgramHistogramMax: 9, EmptinessCheckTime: 0.0s, AutomataDifference: 13.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 284 SDtfs, 741 SDslu, 1424 SDs, 0 SdLazy, 5181 SolverSat, 265 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 6.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 671 GetRequests, 259 SyntacticMatches, 4 SemanticMatches, 408 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2173 ImplicationChecksByTransitivity, 10.9s Time, 0.0s 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, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 19 MinimizatonAttempts, 62 StatesRemovedByMinimization, 14 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 11.2s 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! [2021-10-28 23:56:46,500 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb13162f-7ac5-41f0-9c58-8cfb946adbe3/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...