./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/openbsd_cstrncpy-alloca-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 0f8a17c6 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0566fbfe-7b88-4fd4-9343-ef7414c6021f/bin/uautomizer-ZXIjhQolGL/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0566fbfe-7b88-4fd4-9343-ef7414c6021f/bin/uautomizer-ZXIjhQolGL/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0566fbfe-7b88-4fd4-9343-ef7414c6021f/bin/uautomizer-ZXIjhQolGL/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0566fbfe-7b88-4fd4-9343-ef7414c6021f/bin/uautomizer-ZXIjhQolGL/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/openbsd_cstrncpy-alloca-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0566fbfe-7b88-4fd4-9343-ef7414c6021f/bin/uautomizer-ZXIjhQolGL/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0566fbfe-7b88-4fd4-9343-ef7414c6021f/bin/uautomizer-ZXIjhQolGL --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 57855fd15a600148bf8b2d693e60ae0827a95c157ed69e07e1c42c75fda7c9c4 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 04:32:39,202 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 04:32:39,206 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 04:32:39,265 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 04:32:39,266 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 04:32:39,271 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 04:32:39,273 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 04:32:39,277 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 04:32:39,280 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 04:32:39,286 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 04:32:39,287 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 04:32:39,289 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 04:32:39,290 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 04:32:39,293 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 04:32:39,295 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 04:32:39,301 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 04:32:39,302 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 04:32:39,303 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 04:32:39,306 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 04:32:39,309 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 04:32:39,311 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 04:32:39,312 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 04:32:39,314 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 04:32:39,315 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 04:32:39,319 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 04:32:39,319 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 04:32:39,320 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 04:32:39,321 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 04:32:39,321 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 04:32:39,323 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 04:32:39,323 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 04:32:39,324 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 04:32:39,325 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 04:32:39,326 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 04:32:39,327 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 04:32:39,328 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 04:32:39,329 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 04:32:39,329 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 04:32:39,330 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 04:32:39,331 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 04:32:39,331 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 04:32:39,333 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0566fbfe-7b88-4fd4-9343-ef7414c6021f/bin/uautomizer-ZXIjhQolGL/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-11-19 04:32:39,357 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 04:32:39,360 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 04:32:39,360 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-19 04:32:39,361 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-19 04:32:39,362 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 04:32:39,362 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 04:32:39,363 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-19 04:32:39,363 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-19 04:32:39,363 INFO L138 SettingsManager]: * Use SBE=true [2021-11-19 04:32:39,364 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 04:32:39,365 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 04:32:39,365 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-19 04:32:39,365 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 04:32:39,365 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 04:32:39,366 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 04:32:39,366 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-19 04:32:39,366 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-19 04:32:39,366 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-19 04:32:39,367 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 04:32:39,367 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 04:32:39,367 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 04:32:39,367 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 04:32:39,368 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 04:32:39,368 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-19 04:32:39,368 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 04:32:39,368 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 04:32:39,369 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 04:32:39,369 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 04:32:39,369 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-19 04:32:39,369 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 04:32:39,370 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 04:32:39,370 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_0566fbfe-7b88-4fd4-9343-ef7414c6021f/bin/uautomizer-ZXIjhQolGL/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0566fbfe-7b88-4fd4-9343-ef7414c6021f/bin/uautomizer-ZXIjhQolGL Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 57855fd15a600148bf8b2d693e60ae0827a95c157ed69e07e1c42c75fda7c9c4 [2021-11-19 04:32:39,679 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 04:32:39,703 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 04:32:39,706 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 04:32:39,707 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 04:32:39,708 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 04:32:39,710 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0566fbfe-7b88-4fd4-9343-ef7414c6021f/bin/uautomizer-ZXIjhQolGL/../../sv-benchmarks/c/array-memsafety/openbsd_cstrncpy-alloca-2.i [2021-11-19 04:32:39,779 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0566fbfe-7b88-4fd4-9343-ef7414c6021f/bin/uautomizer-ZXIjhQolGL/data/d5f1de8cb/846b3a8c3c0f4b6eb14dd23598f8bd3b/FLAG28a388d62 [2021-11-19 04:32:40,341 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 04:32:40,342 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0566fbfe-7b88-4fd4-9343-ef7414c6021f/sv-benchmarks/c/array-memsafety/openbsd_cstrncpy-alloca-2.i [2021-11-19 04:32:40,355 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0566fbfe-7b88-4fd4-9343-ef7414c6021f/bin/uautomizer-ZXIjhQolGL/data/d5f1de8cb/846b3a8c3c0f4b6eb14dd23598f8bd3b/FLAG28a388d62 [2021-11-19 04:32:40,655 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0566fbfe-7b88-4fd4-9343-ef7414c6021f/bin/uautomizer-ZXIjhQolGL/data/d5f1de8cb/846b3a8c3c0f4b6eb14dd23598f8bd3b [2021-11-19 04:32:40,659 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 04:32:40,662 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-11-19 04:32:40,665 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 04:32:40,666 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 04:32:40,670 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 04:32:40,671 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:32:40" (1/1) ... [2021-11-19 04:32:40,674 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e35d42c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:32:40, skipping insertion in model container [2021-11-19 04:32:40,674 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:32:40" (1/1) ... [2021-11-19 04:32:40,683 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 04:32:40,739 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 04:32:41,138 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 04:32:41,147 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 04:32:41,187 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 04:32:41,231 INFO L208 MainTranslator]: Completed translation [2021-11-19 04:32:41,231 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:32:41 WrapperNode [2021-11-19 04:32:41,232 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 04:32:41,233 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 04:32:41,233 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 04:32:41,233 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 04:32:41,247 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:32:41" (1/1) ... [2021-11-19 04:32:41,247 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:32:41" (1/1) ... [2021-11-19 04:32:41,260 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:32:41" (1/1) ... [2021-11-19 04:32:41,260 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:32:41" (1/1) ... [2021-11-19 04:32:41,276 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:32:41" (1/1) ... [2021-11-19 04:32:41,281 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:32:41" (1/1) ... [2021-11-19 04:32:41,284 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:32:41" (1/1) ... [2021-11-19 04:32:41,290 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 04:32:41,291 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 04:32:41,292 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 04:32:41,292 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 04:32:41,293 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:32:41" (1/1) ... [2021-11-19 04:32:41,303 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 04:32:41,315 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0566fbfe-7b88-4fd4-9343-ef7414c6021f/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:32:41,326 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0566fbfe-7b88-4fd4-9343-ef7414c6021f/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 04:32:41,328 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0566fbfe-7b88-4fd4-9343-ef7414c6021f/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 04:32:41,364 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-11-19 04:32:41,365 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 04:32:41,366 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-11-19 04:32:41,366 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-11-19 04:32:41,366 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2021-11-19 04:32:41,367 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2021-11-19 04:32:41,367 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2021-11-19 04:32:41,368 INFO L138 BoogieDeclarations]: Found implementation of procedure cstrncpy [2021-11-19 04:32:41,368 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-11-19 04:32:41,369 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-11-19 04:32:41,369 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-11-19 04:32:41,369 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-11-19 04:32:41,369 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-11-19 04:32:41,370 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-11-19 04:32:41,370 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-11-19 04:32:41,370 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-11-19 04:32:41,370 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-11-19 04:32:41,370 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-11-19 04:32:41,371 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-11-19 04:32:41,371 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-11-19 04:32:41,371 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-11-19 04:32:41,371 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-11-19 04:32:41,371 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-11-19 04:32:41,372 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-11-19 04:32:41,372 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-11-19 04:32:41,372 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-11-19 04:32:41,372 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-11-19 04:32:41,372 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2021-11-19 04:32:41,373 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2021-11-19 04:32:41,373 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2021-11-19 04:32:41,373 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-11-19 04:32:41,373 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-11-19 04:32:41,374 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-11-19 04:32:41,374 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-11-19 04:32:41,374 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-11-19 04:32:41,374 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-11-19 04:32:41,374 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-11-19 04:32:41,375 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-11-19 04:32:41,375 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-11-19 04:32:41,375 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-11-19 04:32:41,375 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-11-19 04:32:41,375 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-11-19 04:32:41,376 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-11-19 04:32:41,376 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-11-19 04:32:41,376 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-11-19 04:32:41,376 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-11-19 04:32:41,377 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-11-19 04:32:41,377 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-11-19 04:32:41,377 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-11-19 04:32:41,377 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-11-19 04:32:41,377 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-11-19 04:32:41,378 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-11-19 04:32:41,378 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-11-19 04:32:41,379 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-11-19 04:32:41,379 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-11-19 04:32:41,379 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-11-19 04:32:41,379 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-11-19 04:32:41,380 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-11-19 04:32:41,380 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-11-19 04:32:41,380 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-11-19 04:32:41,381 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-11-19 04:32:41,381 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-11-19 04:32:41,381 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-11-19 04:32:41,381 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-11-19 04:32:41,382 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-11-19 04:32:41,382 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-11-19 04:32:41,383 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-11-19 04:32:41,383 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-11-19 04:32:41,384 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-11-19 04:32:41,384 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-11-19 04:32:41,384 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-11-19 04:32:41,385 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-11-19 04:32:41,385 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-11-19 04:32:41,385 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-11-19 04:32:41,385 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-11-19 04:32:41,385 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-11-19 04:32:41,385 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-11-19 04:32:41,386 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-11-19 04:32:41,386 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-11-19 04:32:41,386 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-11-19 04:32:41,386 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-11-19 04:32:41,387 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-11-19 04:32:41,387 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-11-19 04:32:41,387 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-11-19 04:32:41,388 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-11-19 04:32:41,388 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-11-19 04:32:41,388 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-11-19 04:32:41,388 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-11-19 04:32:41,389 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-11-19 04:32:41,389 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-11-19 04:32:41,389 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-11-19 04:32:41,389 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-11-19 04:32:41,390 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-11-19 04:32:41,390 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-11-19 04:32:41,390 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-11-19 04:32:41,390 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-11-19 04:32:41,390 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-11-19 04:32:41,390 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-11-19 04:32:41,390 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-11-19 04:32:41,391 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-11-19 04:32:41,391 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-11-19 04:32:41,391 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-11-19 04:32:41,391 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-11-19 04:32:41,391 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-11-19 04:32:41,391 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-11-19 04:32:41,392 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-11-19 04:32:41,392 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-11-19 04:32:41,392 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-11-19 04:32:41,393 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-11-19 04:32:41,393 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-11-19 04:32:41,393 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-11-19 04:32:41,393 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-11-19 04:32:41,394 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-11-19 04:32:41,394 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-11-19 04:32:41,395 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-11-19 04:32:41,395 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-11-19 04:32:41,395 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-11-19 04:32:41,395 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2021-11-19 04:32:41,395 INFO L130 BoogieDeclarations]: Found specification of procedure cstrncpy [2021-11-19 04:32:41,395 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-19 04:32:41,395 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-19 04:32:41,396 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-11-19 04:32:41,396 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-19 04:32:41,396 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-19 04:32:41,396 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-11-19 04:32:41,397 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 04:32:41,698 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 04:32:41,700 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 04:32:42,022 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 04:32:42,033 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 04:32:42,034 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-19 04:32:42,036 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:32:42 BoogieIcfgContainer [2021-11-19 04:32:42,037 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 04:32:42,040 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 04:32:42,040 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 04:32:42,050 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 04:32:42,051 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 04:32:40" (1/3) ... [2021-11-19 04:32:42,052 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a86a6dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:32:42, skipping insertion in model container [2021-11-19 04:32:42,052 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:32:41" (2/3) ... [2021-11-19 04:32:42,052 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a86a6dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:32:42, skipping insertion in model container [2021-11-19 04:32:42,053 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:32:42" (3/3) ... [2021-11-19 04:32:42,054 INFO L111 eAbstractionObserver]: Analyzing ICFG openbsd_cstrncpy-alloca-2.i [2021-11-19 04:32:42,060 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 04:32:42,060 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 11 error locations. [2021-11-19 04:32:42,124 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 04:32:42,137 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 [2021-11-19 04:32:42,138 INFO L340 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2021-11-19 04:32:42,158 INFO L276 IsEmpty]: Start isEmpty. Operand has 46 states, 28 states have (on average 1.75) internal successors, (49), 39 states have internal predecessors, (49), 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) [2021-11-19 04:32:42,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-19 04:32:42,177 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:32:42,178 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:32:42,178 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0REQUIRES_VIOLATION === [cstrncpyErr0REQUIRES_VIOLATION, cstrncpyErr1REQUIRES_VIOLATION, cstrncpyErr2REQUIRES_VIOLATION, cstrncpyErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-19 04:32:42,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:32:42,184 INFO L85 PathProgramCache]: Analyzing trace with hash -1701976042, now seen corresponding path program 1 times [2021-11-19 04:32:42,194 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:32:42,194 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552809839] [2021-11-19 04:32:42,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:32:42,195 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:32:42,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:32:42,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 04:32:42,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:32:42,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:32:42,521 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:32:42,521 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552809839] [2021-11-19 04:32:42,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552809839] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:32:42,522 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:32:42,523 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 04:32:42,524 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922590362] [2021-11-19 04:32:42,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:32:42,530 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 04:32:42,530 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:32:42,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 04:32:42,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 04:32:42,571 INFO L87 Difference]: Start difference. First operand has 46 states, 28 states have (on average 1.75) internal successors, (49), 39 states have internal predecessors, (49), 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 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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) [2021-11-19 04:32:42,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:32:42,742 INFO L93 Difference]: Finished difference Result 44 states and 50 transitions. [2021-11-19 04:32:42,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 04:32:42,745 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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 11 [2021-11-19 04:32:42,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:32:42,753 INFO L225 Difference]: With dead ends: 44 [2021-11-19 04:32:42,754 INFO L226 Difference]: Without dead ends: 41 [2021-11-19 04:32:42,756 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 04:32:42,760 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 47 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:32:42,762 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 53 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 04:32:42,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-11-19 04:32:42,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2021-11-19 04:32:42,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 27 states have (on average 1.5555555555555556) internal successors, (42), 35 states have internal predecessors, (42), 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) [2021-11-19 04:32:42,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2021-11-19 04:32:42,803 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 11 [2021-11-19 04:32:42,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:32:42,803 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2021-11-19 04:32:42,804 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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) [2021-11-19 04:32:42,804 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2021-11-19 04:32:42,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-19 04:32:42,805 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:32:42,805 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:32:42,805 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-19 04:32:42,806 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr1REQUIRES_VIOLATION === [cstrncpyErr0REQUIRES_VIOLATION, cstrncpyErr1REQUIRES_VIOLATION, cstrncpyErr2REQUIRES_VIOLATION, cstrncpyErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-19 04:32:42,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:32:42,807 INFO L85 PathProgramCache]: Analyzing trace with hash -1701976041, now seen corresponding path program 1 times [2021-11-19 04:32:42,807 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:32:42,807 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135990214] [2021-11-19 04:32:42,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:32:42,808 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:32:42,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:32:42,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 04:32:42,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:32:42,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:32:42,978 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:32:42,978 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135990214] [2021-11-19 04:32:42,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135990214] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:32:42,979 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:32:42,980 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-19 04:32:42,980 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443031083] [2021-11-19 04:32:42,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:32:42,981 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 04:32:42,982 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:32:42,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 04:32:42,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-19 04:32:42,984 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 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) [2021-11-19 04:32:43,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:32:43,211 INFO L93 Difference]: Finished difference Result 50 states and 57 transitions. [2021-11-19 04:32:43,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 04:32:43,212 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 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 11 [2021-11-19 04:32:43,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:32:43,216 INFO L225 Difference]: With dead ends: 50 [2021-11-19 04:32:43,216 INFO L226 Difference]: Without dead ends: 50 [2021-11-19 04:32:43,217 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-19 04:32:43,223 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 73 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 04:32:43,224 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 52 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 04:32:43,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-11-19 04:32:43,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 44. [2021-11-19 04:32:43,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 30 states have (on average 1.5333333333333334) internal successors, (46), 38 states have internal predecessors, (46), 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) [2021-11-19 04:32:43,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 51 transitions. [2021-11-19 04:32:43,251 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 51 transitions. Word has length 11 [2021-11-19 04:32:43,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:32:43,252 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 51 transitions. [2021-11-19 04:32:43,252 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 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) [2021-11-19 04:32:43,252 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 51 transitions. [2021-11-19 04:32:43,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-19 04:32:43,255 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:32:43,255 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:32:43,256 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-19 04:32:43,256 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr1REQUIRES_VIOLATION === [cstrncpyErr0REQUIRES_VIOLATION, cstrncpyErr1REQUIRES_VIOLATION, cstrncpyErr2REQUIRES_VIOLATION, cstrncpyErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-19 04:32:43,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:32:43,257 INFO L85 PathProgramCache]: Analyzing trace with hash 1386828186, now seen corresponding path program 1 times [2021-11-19 04:32:43,257 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:32:43,258 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223222838] [2021-11-19 04:32:43,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:32:43,260 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:32:43,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:32:43,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 04:32:43,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:32:43,429 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:32:43,429 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:32:43,430 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223222838] [2021-11-19 04:32:43,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223222838] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:32:43,434 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245064009] [2021-11-19 04:32:43,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:32:43,434 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:32:43,435 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0566fbfe-7b88-4fd4-9343-ef7414c6021f/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:32:43,440 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0566fbfe-7b88-4fd4-9343-ef7414c6021f/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:32:43,462 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0566fbfe-7b88-4fd4-9343-ef7414c6021f/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-19 04:32:43,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:32:43,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-19 04:32:43,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:32:43,727 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-19 04:32:43,728 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-19 04:32:43,909 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:32:43,909 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:32:44,241 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:32:44,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1245064009] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:32:44,245 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:32:44,246 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 9 [2021-11-19 04:32:44,246 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585666189] [2021-11-19 04:32:44,246 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:32:44,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-19 04:32:44,249 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:32:44,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-19 04:32:44,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-19 04:32:44,254 INFO L87 Difference]: Start difference. First operand 44 states and 51 transitions. Second operand has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 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) [2021-11-19 04:32:44,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:32:44,604 INFO L93 Difference]: Finished difference Result 55 states and 63 transitions. [2021-11-19 04:32:44,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 04:32:44,607 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 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 15 [2021-11-19 04:32:44,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:32:44,608 INFO L225 Difference]: With dead ends: 55 [2021-11-19 04:32:44,608 INFO L226 Difference]: Without dead ends: 55 [2021-11-19 04:32:44,609 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2021-11-19 04:32:44,610 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 91 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 04:32:44,611 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 61 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 04:32:44,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-11-19 04:32:44,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 46. [2021-11-19 04:32:44,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 33 states have (on average 1.4848484848484849) internal successors, (49), 40 states have internal predecessors, (49), 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) [2021-11-19 04:32:44,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 54 transitions. [2021-11-19 04:32:44,619 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 54 transitions. Word has length 15 [2021-11-19 04:32:44,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:32:44,620 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 54 transitions. [2021-11-19 04:32:44,620 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 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) [2021-11-19 04:32:44,621 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 54 transitions. [2021-11-19 04:32:44,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-19 04:32:44,622 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:32:44,622 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:32:44,666 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0566fbfe-7b88-4fd4-9343-ef7414c6021f/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-19 04:32:44,847 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0566fbfe-7b88-4fd4-9343-ef7414c6021f/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:32:44,847 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr3REQUIRES_VIOLATION === [cstrncpyErr0REQUIRES_VIOLATION, cstrncpyErr1REQUIRES_VIOLATION, cstrncpyErr2REQUIRES_VIOLATION, cstrncpyErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-19 04:32:44,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:32:44,848 INFO L85 PathProgramCache]: Analyzing trace with hash 1386828133, now seen corresponding path program 1 times [2021-11-19 04:32:44,848 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:32:44,848 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892828372] [2021-11-19 04:32:44,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:32:44,849 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:32:44,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:32:44,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 04:32:44,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:32:44,940 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 04:32:44,941 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:32:44,941 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892828372] [2021-11-19 04:32:44,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892828372] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:32:44,942 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:32:44,942 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 04:32:44,942 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926177230] [2021-11-19 04:32:44,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:32:44,943 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 04:32:44,943 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:32:44,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 04:32:44,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-19 04:32:44,944 INFO L87 Difference]: Start difference. First operand 46 states and 54 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (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) [2021-11-19 04:32:45,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:32:45,036 INFO L93 Difference]: Finished difference Result 45 states and 53 transitions. [2021-11-19 04:32:45,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 04:32:45,036 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (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 15 [2021-11-19 04:32:45,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:32:45,038 INFO L225 Difference]: With dead ends: 45 [2021-11-19 04:32:45,038 INFO L226 Difference]: Without dead ends: 45 [2021-11-19 04:32:45,039 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-19 04:32:45,046 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 51 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:32:45,048 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 47 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 04:32:45,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-11-19 04:32:45,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 39. [2021-11-19 04:32:45,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 33 states have internal predecessors, (40), 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) [2021-11-19 04:32:45,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2021-11-19 04:32:45,060 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 15 [2021-11-19 04:32:45,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:32:45,061 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2021-11-19 04:32:45,061 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (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) [2021-11-19 04:32:45,062 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2021-11-19 04:32:45,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-19 04:32:45,063 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:32:45,063 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:32:45,063 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-19 04:32:45,063 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting cstrncpyErr0REQUIRES_VIOLATION === [cstrncpyErr0REQUIRES_VIOLATION, cstrncpyErr1REQUIRES_VIOLATION, cstrncpyErr2REQUIRES_VIOLATION, cstrncpyErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-19 04:32:45,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:32:45,064 INFO L85 PathProgramCache]: Analyzing trace with hash -1459265875, now seen corresponding path program 1 times [2021-11-19 04:32:45,064 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:32:45,064 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198844543] [2021-11-19 04:32:45,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:32:45,065 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:32:45,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:32:45,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 04:32:45,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:32:45,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:32:45,189 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:32:45,190 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198844543] [2021-11-19 04:32:45,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198844543] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:32:45,190 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:32:45,190 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-19 04:32:45,190 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101912419] [2021-11-19 04:32:45,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:32:45,191 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 04:32:45,191 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:32:45,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 04:32:45,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-19 04:32:45,192 INFO L87 Difference]: Start difference. First operand 39 states and 45 transitions. Second operand has 8 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 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) [2021-11-19 04:32:45,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:32:45,422 INFO L93 Difference]: Finished difference Result 41 states and 47 transitions. [2021-11-19 04:32:45,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 04:32:45,422 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 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 16 [2021-11-19 04:32:45,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:32:45,428 INFO L225 Difference]: With dead ends: 41 [2021-11-19 04:32:45,429 INFO L226 Difference]: Without dead ends: 41 [2021-11-19 04:32:45,429 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-11-19 04:32:45,431 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 107 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:32:45,434 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 55 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 04:32:45,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-11-19 04:32:45,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 38. [2021-11-19 04:32:45,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 32 states have internal predecessors, (39), 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) [2021-11-19 04:32:45,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2021-11-19 04:32:45,451 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 16 [2021-11-19 04:32:45,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:32:45,452 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2021-11-19 04:32:45,452 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 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) [2021-11-19 04:32:45,454 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2021-11-19 04:32:45,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-19 04:32:45,455 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:32:45,456 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:32:45,456 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-19 04:32:45,456 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting cstrncpyErr1REQUIRES_VIOLATION === [cstrncpyErr0REQUIRES_VIOLATION, cstrncpyErr1REQUIRES_VIOLATION, cstrncpyErr2REQUIRES_VIOLATION, cstrncpyErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-19 04:32:45,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:32:45,457 INFO L85 PathProgramCache]: Analyzing trace with hash -1459265874, now seen corresponding path program 1 times [2021-11-19 04:32:45,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:32:45,458 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413920595] [2021-11-19 04:32:45,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:32:45,458 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:32:45,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:32:45,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 04:32:45,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:32:45,617 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:32:45,617 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:32:45,617 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413920595] [2021-11-19 04:32:45,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413920595] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:32:45,617 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:32:45,617 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-19 04:32:45,618 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512164696] [2021-11-19 04:32:45,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:32:45,618 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-19 04:32:45,618 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:32:45,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-19 04:32:45,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-11-19 04:32:45,619 INFO L87 Difference]: Start difference. First operand 38 states and 44 transitions. Second operand has 10 states, 8 states have (on average 1.5) internal successors, (12), 8 states have internal predecessors, (12), 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) [2021-11-19 04:32:45,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:32:45,897 INFO L93 Difference]: Finished difference Result 44 states and 51 transitions. [2021-11-19 04:32:45,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 04:32:45,897 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 1.5) internal successors, (12), 8 states have internal predecessors, (12), 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 16 [2021-11-19 04:32:45,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:32:45,898 INFO L225 Difference]: With dead ends: 44 [2021-11-19 04:32:45,899 INFO L226 Difference]: Without dead ends: 44 [2021-11-19 04:32:45,899 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-11-19 04:32:45,900 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 121 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 04:32:45,900 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 68 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 04:32:45,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-11-19 04:32:45,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 40. [2021-11-19 04:32:45,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 29 states have (on average 1.4137931034482758) internal successors, (41), 34 states have internal predecessors, (41), 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) [2021-11-19 04:32:45,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 46 transitions. [2021-11-19 04:32:45,906 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 46 transitions. Word has length 16 [2021-11-19 04:32:45,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:32:45,906 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 46 transitions. [2021-11-19 04:32:45,906 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 1.5) internal successors, (12), 8 states have internal predecessors, (12), 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) [2021-11-19 04:32:45,907 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 46 transitions. [2021-11-19 04:32:45,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-19 04:32:45,907 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:32:45,908 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:32:45,908 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-19 04:32:45,908 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting cstrncpyErr2REQUIRES_VIOLATION === [cstrncpyErr0REQUIRES_VIOLATION, cstrncpyErr1REQUIRES_VIOLATION, cstrncpyErr2REQUIRES_VIOLATION, cstrncpyErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-19 04:32:45,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:32:45,909 INFO L85 PathProgramCache]: Analyzing trace with hash 2007398120, now seen corresponding path program 1 times [2021-11-19 04:32:45,909 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:32:45,909 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504283949] [2021-11-19 04:32:45,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:32:45,909 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:32:45,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:32:46,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 04:32:46,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:32:46,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:32:46,008 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:32:46,008 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504283949] [2021-11-19 04:32:46,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504283949] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:32:46,009 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:32:46,009 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-19 04:32:46,009 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827903527] [2021-11-19 04:32:46,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:32:46,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-19 04:32:46,010 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:32:46,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-19 04:32:46,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-11-19 04:32:46,011 INFO L87 Difference]: Start difference. First operand 40 states and 46 transitions. Second operand has 9 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 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) [2021-11-19 04:32:46,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:32:46,212 INFO L93 Difference]: Finished difference Result 42 states and 48 transitions. [2021-11-19 04:32:46,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 04:32:46,213 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 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 17 [2021-11-19 04:32:46,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:32:46,214 INFO L225 Difference]: With dead ends: 42 [2021-11-19 04:32:46,214 INFO L226 Difference]: Without dead ends: 42 [2021-11-19 04:32:46,214 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-11-19 04:32:46,215 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 98 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:32:46,215 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 56 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 04:32:46,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-11-19 04:32:46,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 39. [2021-11-19 04:32:46,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 33 states have internal predecessors, (40), 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) [2021-11-19 04:32:46,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2021-11-19 04:32:46,220 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 17 [2021-11-19 04:32:46,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:32:46,220 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2021-11-19 04:32:46,220 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 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) [2021-11-19 04:32:46,220 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2021-11-19 04:32:46,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-19 04:32:46,221 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:32:46,221 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:32:46,221 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-19 04:32:46,221 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting cstrncpyErr3REQUIRES_VIOLATION === [cstrncpyErr0REQUIRES_VIOLATION, cstrncpyErr1REQUIRES_VIOLATION, cstrncpyErr2REQUIRES_VIOLATION, cstrncpyErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-19 04:32:46,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:32:46,222 INFO L85 PathProgramCache]: Analyzing trace with hash 2007398121, now seen corresponding path program 1 times [2021-11-19 04:32:46,222 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:32:46,222 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531731343] [2021-11-19 04:32:46,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:32:46,222 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:32:46,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:32:46,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 04:32:46,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:32:46,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:32:46,348 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:32:46,348 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531731343] [2021-11-19 04:32:46,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531731343] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:32:46,348 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:32:46,349 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-19 04:32:46,349 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799729511] [2021-11-19 04:32:46,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:32:46,349 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-19 04:32:46,349 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:32:46,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-19 04:32:46,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-11-19 04:32:46,350 INFO L87 Difference]: Start difference. First operand 39 states and 45 transitions. Second operand has 9 states, 8 states have (on average 1.625) internal successors, (13), 7 states have internal predecessors, (13), 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) [2021-11-19 04:32:46,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:32:46,583 INFO L93 Difference]: Finished difference Result 41 states and 48 transitions. [2021-11-19 04:32:46,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 04:32:46,584 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.625) internal successors, (13), 7 states have internal predecessors, (13), 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 17 [2021-11-19 04:32:46,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:32:46,585 INFO L225 Difference]: With dead ends: 41 [2021-11-19 04:32:46,585 INFO L226 Difference]: Without dead ends: 41 [2021-11-19 04:32:46,585 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-11-19 04:32:46,586 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 101 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:32:46,586 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 62 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 04:32:46,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-11-19 04:32:46,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2021-11-19 04:32:46,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 30 states have (on average 1.3666666666666667) internal successors, (41), 34 states have internal predecessors, (41), 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) [2021-11-19 04:32:46,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 46 transitions. [2021-11-19 04:32:46,591 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 46 transitions. Word has length 17 [2021-11-19 04:32:46,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:32:46,591 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 46 transitions. [2021-11-19 04:32:46,591 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.625) internal successors, (13), 7 states have internal predecessors, (13), 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) [2021-11-19 04:32:46,591 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 46 transitions. [2021-11-19 04:32:46,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-19 04:32:46,592 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:32:46,592 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:32:46,592 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-19 04:32:46,593 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr4ENSURES_VIOLATIONMEMORY_LEAK === [cstrncpyErr0REQUIRES_VIOLATION, cstrncpyErr1REQUIRES_VIOLATION, cstrncpyErr2REQUIRES_VIOLATION, cstrncpyErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-19 04:32:46,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:32:46,593 INFO L85 PathProgramCache]: Analyzing trace with hash 1969083859, now seen corresponding path program 1 times [2021-11-19 04:32:46,593 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:32:46,594 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955746068] [2021-11-19 04:32:46,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:32:46,594 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:32:46,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:32:46,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 04:32:46,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:32:46,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-19 04:32:46,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:32:46,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:32:46,687 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:32:46,687 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955746068] [2021-11-19 04:32:46,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955746068] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:32:46,687 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:32:46,688 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-19 04:32:46,688 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984321] [2021-11-19 04:32:46,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:32:46,688 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 04:32:46,689 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:32:46,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 04:32:46,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-19 04:32:46,689 INFO L87 Difference]: Start difference. First operand 40 states and 46 transitions. Second operand has 7 states, 7 states have (on average 2.0) internal successors, (14), 5 states have internal predecessors, (14), 2 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) [2021-11-19 04:32:46,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:32:46,900 INFO L93 Difference]: Finished difference Result 62 states and 72 transitions. [2021-11-19 04:32:46,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-19 04:32:46,901 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 5 states have internal predecessors, (14), 2 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) Word has length 19 [2021-11-19 04:32:46,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:32:46,902 INFO L225 Difference]: With dead ends: 62 [2021-11-19 04:32:46,902 INFO L226 Difference]: Without dead ends: 62 [2021-11-19 04:32:46,902 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-11-19 04:32:46,903 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 88 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:32:46,903 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 46 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 04:32:46,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-11-19 04:32:46,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 50. [2021-11-19 04:32:46,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 38 states have (on average 1.3157894736842106) internal successors, (50), 44 states have internal predecessors, (50), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-19 04:32:46,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 58 transitions. [2021-11-19 04:32:46,912 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 58 transitions. Word has length 19 [2021-11-19 04:32:46,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:32:46,913 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 58 transitions. [2021-11-19 04:32:46,913 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 5 states have internal predecessors, (14), 2 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) [2021-11-19 04:32:46,913 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 58 transitions. [2021-11-19 04:32:46,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-19 04:32:46,914 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:32:46,914 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:32:46,915 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-19 04:32:46,915 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr4ENSURES_VIOLATIONMEMORY_LEAK === [cstrncpyErr0REQUIRES_VIOLATION, cstrncpyErr1REQUIRES_VIOLATION, cstrncpyErr2REQUIRES_VIOLATION, cstrncpyErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-19 04:32:46,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:32:46,915 INFO L85 PathProgramCache]: Analyzing trace with hash -2067717999, now seen corresponding path program 1 times [2021-11-19 04:32:46,916 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:32:46,916 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115057484] [2021-11-19 04:32:46,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:32:46,916 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:32:46,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:32:46,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 04:32:46,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:32:46,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-19 04:32:46,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:32:47,041 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:32:47,041 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:32:47,042 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115057484] [2021-11-19 04:32:47,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115057484] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:32:47,042 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:32:47,042 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-19 04:32:47,042 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506047368] [2021-11-19 04:32:47,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:32:47,044 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 04:32:47,044 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:32:47,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 04:32:47,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-19 04:32:47,045 INFO L87 Difference]: Start difference. First operand 50 states and 58 transitions. Second operand has 8 states, 8 states have (on average 1.75) internal successors, (14), 6 states have internal predecessors, (14), 2 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) [2021-11-19 04:32:47,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:32:47,246 INFO L93 Difference]: Finished difference Result 59 states and 69 transitions. [2021-11-19 04:32:47,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-19 04:32:47,247 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 6 states have internal predecessors, (14), 2 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) Word has length 19 [2021-11-19 04:32:47,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:32:47,248 INFO L225 Difference]: With dead ends: 59 [2021-11-19 04:32:47,248 INFO L226 Difference]: Without dead ends: 56 [2021-11-19 04:32:47,248 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2021-11-19 04:32:47,249 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 87 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:32:47,249 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 42 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 04:32:47,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-11-19 04:32:47,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 40. [2021-11-19 04:32:47,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 30 states have (on average 1.3333333333333333) internal successors, (40), 34 states have internal predecessors, (40), 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) [2021-11-19 04:32:47,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 45 transitions. [2021-11-19 04:32:47,254 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 45 transitions. Word has length 19 [2021-11-19 04:32:47,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:32:47,254 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 45 transitions. [2021-11-19 04:32:47,254 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 6 states have internal predecessors, (14), 2 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) [2021-11-19 04:32:47,254 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 45 transitions. [2021-11-19 04:32:47,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-19 04:32:47,262 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:32:47,262 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:32:47,262 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-19 04:32:47,263 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting cstrncpyErr4REQUIRES_VIOLATION === [cstrncpyErr0REQUIRES_VIOLATION, cstrncpyErr1REQUIRES_VIOLATION, cstrncpyErr2REQUIRES_VIOLATION, cstrncpyErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-19 04:32:47,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:32:47,263 INFO L85 PathProgramCache]: Analyzing trace with hash -1069677202, now seen corresponding path program 1 times [2021-11-19 04:32:47,264 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:32:47,264 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865675334] [2021-11-19 04:32:47,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:32:47,264 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:32:47,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:32:47,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 04:32:47,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:32:47,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:32:47,329 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:32:47,329 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865675334] [2021-11-19 04:32:47,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865675334] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:32:47,330 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:32:47,330 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-19 04:32:47,330 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623423872] [2021-11-19 04:32:47,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:32:47,330 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 04:32:47,331 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:32:47,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 04:32:47,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-19 04:32:47,332 INFO L87 Difference]: Start difference. First operand 40 states and 45 transitions. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 5 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) [2021-11-19 04:32:47,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:32:47,442 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2021-11-19 04:32:47,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 04:32:47,443 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 5 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 21 [2021-11-19 04:32:47,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:32:47,443 INFO L225 Difference]: With dead ends: 39 [2021-11-19 04:32:47,444 INFO L226 Difference]: Without dead ends: 39 [2021-11-19 04:32:47,444 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-11-19 04:32:47,445 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 51 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:32:47,445 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 53 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 04:32:47,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-11-19 04:32:47,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-11-19 04:32:47,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 30 states have (on average 1.3) internal successors, (39), 33 states have internal predecessors, (39), 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) [2021-11-19 04:32:47,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 44 transitions. [2021-11-19 04:32:47,449 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 44 transitions. Word has length 21 [2021-11-19 04:32:47,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:32:47,450 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 44 transitions. [2021-11-19 04:32:47,450 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 5 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) [2021-11-19 04:32:47,450 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 44 transitions. [2021-11-19 04:32:47,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-19 04:32:47,451 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:32:47,451 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:32:47,452 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-19 04:32:47,452 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting cstrncpyErr5REQUIRES_VIOLATION === [cstrncpyErr0REQUIRES_VIOLATION, cstrncpyErr1REQUIRES_VIOLATION, cstrncpyErr2REQUIRES_VIOLATION, cstrncpyErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-19 04:32:47,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:32:47,453 INFO L85 PathProgramCache]: Analyzing trace with hash -1069677201, now seen corresponding path program 1 times [2021-11-19 04:32:47,453 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:32:47,453 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185789111] [2021-11-19 04:32:47,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:32:47,453 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:32:47,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:32:47,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 04:32:47,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:32:47,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:32:47,575 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:32:47,576 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185789111] [2021-11-19 04:32:47,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185789111] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:32:47,576 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:32:47,576 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-19 04:32:47,576 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781465929] [2021-11-19 04:32:47,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:32:47,577 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 04:32:47,577 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:32:47,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 04:32:47,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-19 04:32:47,578 INFO L87 Difference]: Start difference. First operand 39 states and 44 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 5 states have internal predecessors, (17), 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) [2021-11-19 04:32:47,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:32:47,824 INFO L93 Difference]: Finished difference Result 74 states and 83 transitions. [2021-11-19 04:32:47,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 04:32:47,824 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 5 states have internal predecessors, (17), 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 21 [2021-11-19 04:32:47,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:32:47,825 INFO L225 Difference]: With dead ends: 74 [2021-11-19 04:32:47,826 INFO L226 Difference]: Without dead ends: 74 [2021-11-19 04:32:47,826 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-11-19 04:32:47,827 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 88 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 04:32:47,827 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 63 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 04:32:47,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-11-19 04:32:47,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 67. [2021-11-19 04:32:47,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 56 states have (on average 1.3035714285714286) internal successors, (73), 60 states have internal predecessors, (73), 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) [2021-11-19 04:32:47,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 80 transitions. [2021-11-19 04:32:47,834 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 80 transitions. Word has length 21 [2021-11-19 04:32:47,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:32:47,834 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 80 transitions. [2021-11-19 04:32:47,834 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 5 states have internal predecessors, (17), 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) [2021-11-19 04:32:47,840 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 80 transitions. [2021-11-19 04:32:47,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-19 04:32:47,842 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:32:47,842 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:32:47,843 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-19 04:32:47,843 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting cstrncpyErr5REQUIRES_VIOLATION === [cstrncpyErr0REQUIRES_VIOLATION, cstrncpyErr1REQUIRES_VIOLATION, cstrncpyErr2REQUIRES_VIOLATION, cstrncpyErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-19 04:32:47,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:32:47,843 INFO L85 PathProgramCache]: Analyzing trace with hash -2080794451, now seen corresponding path program 1 times [2021-11-19 04:32:47,843 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:32:47,844 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704624850] [2021-11-19 04:32:47,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:32:47,844 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:32:47,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:32:48,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 04:32:48,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:32:48,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:32:48,163 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:32:48,164 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704624850] [2021-11-19 04:32:48,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704624850] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:32:48,164 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:32:48,164 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-11-19 04:32:48,164 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493970708] [2021-11-19 04:32:48,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:32:48,165 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-19 04:32:48,165 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:32:48,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-19 04:32:48,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-11-19 04:32:48,166 INFO L87 Difference]: Start difference. First operand 67 states and 80 transitions. Second operand has 12 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 10 states have internal predecessors, (17), 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) [2021-11-19 04:32:48,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:32:48,547 INFO L93 Difference]: Finished difference Result 74 states and 89 transitions. [2021-11-19 04:32:48,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-19 04:32:48,547 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 10 states have internal predecessors, (17), 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 21 [2021-11-19 04:32:48,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:32:48,548 INFO L225 Difference]: With dead ends: 74 [2021-11-19 04:32:48,548 INFO L226 Difference]: Without dead ends: 74 [2021-11-19 04:32:48,549 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2021-11-19 04:32:48,550 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 90 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 04:32:48,550 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 62 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 04:32:48,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-11-19 04:32:48,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 71. [2021-11-19 04:32:48,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 60 states have (on average 1.3166666666666667) internal successors, (79), 64 states have internal predecessors, (79), 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) [2021-11-19 04:32:48,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 86 transitions. [2021-11-19 04:32:48,557 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 86 transitions. Word has length 21 [2021-11-19 04:32:48,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:32:48,557 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 86 transitions. [2021-11-19 04:32:48,558 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 10 states have internal predecessors, (17), 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) [2021-11-19 04:32:48,558 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 86 transitions. [2021-11-19 04:32:48,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-19 04:32:48,559 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:32:48,559 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:32:48,559 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-19 04:32:48,559 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting cstrncpyErr1REQUIRES_VIOLATION === [cstrncpyErr0REQUIRES_VIOLATION, cstrncpyErr1REQUIRES_VIOLATION, cstrncpyErr2REQUIRES_VIOLATION, cstrncpyErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-19 04:32:48,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:32:48,560 INFO L85 PathProgramCache]: Analyzing trace with hash 1217783404, now seen corresponding path program 1 times [2021-11-19 04:32:48,560 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:32:48,560 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610358663] [2021-11-19 04:32:48,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:32:48,561 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:32:48,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:32:48,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 04:32:48,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:32:48,662 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:32:48,662 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:32:48,663 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610358663] [2021-11-19 04:32:48,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610358663] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:32:48,663 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:32:48,663 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-19 04:32:48,663 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943153928] [2021-11-19 04:32:48,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:32:48,666 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 04:32:48,666 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:32:48,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 04:32:48,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-19 04:32:48,667 INFO L87 Difference]: Start difference. First operand 71 states and 86 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 5 states have internal predecessors, (18), 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) [2021-11-19 04:32:48,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:32:48,850 INFO L93 Difference]: Finished difference Result 66 states and 74 transitions. [2021-11-19 04:32:48,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 04:32:48,850 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 5 states have internal predecessors, (18), 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 22 [2021-11-19 04:32:48,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:32:48,851 INFO L225 Difference]: With dead ends: 66 [2021-11-19 04:32:48,851 INFO L226 Difference]: Without dead ends: 66 [2021-11-19 04:32:48,852 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-11-19 04:32:48,852 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 70 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:32:48,853 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 59 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 04:32:48,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-11-19 04:32:48,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 63. [2021-11-19 04:32:48,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 52 states have (on average 1.25) internal successors, (65), 56 states have internal predecessors, (65), 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) [2021-11-19 04:32:48,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 72 transitions. [2021-11-19 04:32:48,857 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 72 transitions. Word has length 22 [2021-11-19 04:32:48,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:32:48,858 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 72 transitions. [2021-11-19 04:32:48,858 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 5 states have internal predecessors, (18), 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) [2021-11-19 04:32:48,858 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 72 transitions. [2021-11-19 04:32:48,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-19 04:32:48,866 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:32:48,866 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:32:48,867 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-19 04:32:48,867 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting cstrncpyErr1REQUIRES_VIOLATION === [cstrncpyErr0REQUIRES_VIOLATION, cstrncpyErr1REQUIRES_VIOLATION, cstrncpyErr2REQUIRES_VIOLATION, cstrncpyErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-19 04:32:48,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:32:48,867 INFO L85 PathProgramCache]: Analyzing trace with hash -62080274, now seen corresponding path program 1 times [2021-11-19 04:32:48,868 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:32:48,868 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979930554] [2021-11-19 04:32:48,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:32:48,868 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:32:48,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:32:49,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 04:32:49,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:32:49,076 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:32:49,076 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:32:49,077 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979930554] [2021-11-19 04:32:49,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979930554] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:32:49,077 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:32:49,077 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-11-19 04:32:49,081 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056239858] [2021-11-19 04:32:49,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:32:49,081 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-19 04:32:49,082 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:32:49,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-19 04:32:49,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-11-19 04:32:49,087 INFO L87 Difference]: Start difference. First operand 63 states and 72 transitions. Second operand has 12 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 10 states have internal predecessors, (18), 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) [2021-11-19 04:32:49,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:32:49,406 INFO L93 Difference]: Finished difference Result 106 states and 118 transitions. [2021-11-19 04:32:49,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-19 04:32:49,406 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 10 states have internal predecessors, (18), 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 22 [2021-11-19 04:32:49,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:32:49,408 INFO L225 Difference]: With dead ends: 106 [2021-11-19 04:32:49,408 INFO L226 Difference]: Without dead ends: 106 [2021-11-19 04:32:49,408 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2021-11-19 04:32:49,409 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 100 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 284 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 04:32:49,409 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 66 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 284 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 04:32:49,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-11-19 04:32:49,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 96. [2021-11-19 04:32:49,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 81 states have (on average 1.2222222222222223) internal successors, (99), 87 states have internal predecessors, (99), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-19 04:32:49,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 110 transitions. [2021-11-19 04:32:49,416 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 110 transitions. Word has length 22 [2021-11-19 04:32:49,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:32:49,417 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 110 transitions. [2021-11-19 04:32:49,417 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 10 states have internal predecessors, (18), 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) [2021-11-19 04:32:49,417 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 110 transitions. [2021-11-19 04:32:49,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-19 04:32:49,425 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:32:49,425 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:32:49,425 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-19 04:32:49,425 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr4ENSURES_VIOLATIONMEMORY_LEAK === [cstrncpyErr0REQUIRES_VIOLATION, cstrncpyErr1REQUIRES_VIOLATION, cstrncpyErr2REQUIRES_VIOLATION, cstrncpyErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-19 04:32:49,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:32:49,426 INFO L85 PathProgramCache]: Analyzing trace with hash -1147417034, now seen corresponding path program 1 times [2021-11-19 04:32:49,426 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:32:49,426 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369914265] [2021-11-19 04:32:49,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:32:49,427 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:32:49,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:32:49,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 04:32:49,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:32:49,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-19 04:32:49,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:32:49,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:32:49,496 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:32:49,497 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369914265] [2021-11-19 04:32:49,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369914265] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:32:49,497 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:32:49,497 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-19 04:32:49,497 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005298523] [2021-11-19 04:32:49,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:32:49,498 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 04:32:49,498 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:32:49,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 04:32:49,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-19 04:32:49,499 INFO L87 Difference]: Start difference. First operand 96 states and 110 transitions. Second operand has 6 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 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) [2021-11-19 04:32:49,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:32:49,631 INFO L93 Difference]: Finished difference Result 97 states and 111 transitions. [2021-11-19 04:32:49,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 04:32:49,632 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 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 25 [2021-11-19 04:32:49,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:32:49,633 INFO L225 Difference]: With dead ends: 97 [2021-11-19 04:32:49,633 INFO L226 Difference]: Without dead ends: 54 [2021-11-19 04:32:49,633 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-11-19 04:32:49,634 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 77 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:32:49,635 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 32 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 04:32:49,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-11-19 04:32:49,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 46. [2021-11-19 04:32:49,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 38 states have (on average 1.2105263157894737) internal successors, (46), 40 states have internal predecessors, (46), 4 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 04:32:49,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2021-11-19 04:32:49,638 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 25 [2021-11-19 04:32:49,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:32:49,638 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2021-11-19 04:32:49,639 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 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) [2021-11-19 04:32:49,639 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2021-11-19 04:32:49,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-19 04:32:49,639 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:32:49,640 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:32:49,640 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-19 04:32:49,640 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting cstrncpyErr5REQUIRES_VIOLATION === [cstrncpyErr0REQUIRES_VIOLATION, cstrncpyErr1REQUIRES_VIOLATION, cstrncpyErr2REQUIRES_VIOLATION, cstrncpyErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-19 04:32:49,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:32:49,640 INFO L85 PathProgramCache]: Analyzing trace with hash 1189675621, now seen corresponding path program 1 times [2021-11-19 04:32:49,641 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:32:49,641 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040265736] [2021-11-19 04:32:49,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:32:49,641 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:32:49,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:32:49,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 04:32:50,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:32:50,005 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:32:50,005 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:32:50,005 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040265736] [2021-11-19 04:32:50,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040265736] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:32:50,005 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [242810184] [2021-11-19 04:32:50,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:32:50,006 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:32:50,006 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0566fbfe-7b88-4fd4-9343-ef7414c6021f/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:32:50,007 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0566fbfe-7b88-4fd4-9343-ef7414c6021f/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:32:50,030 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0566fbfe-7b88-4fd4-9343-ef7414c6021f/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-19 04:32:50,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:32:50,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 55 conjunts are in the unsatisfiable core [2021-11-19 04:32:50,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:32:50,221 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-19 04:32:50,221 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-19 04:32:51,346 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:32:51,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:32:52,467 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:32:52,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [242810184] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:32:52,468 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:32:52,468 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 37 [2021-11-19 04:32:52,469 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917030114] [2021-11-19 04:32:52,469 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:32:52,470 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-11-19 04:32:52,470 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:32:52,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-11-19 04:32:52,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1288, Unknown=0, NotChecked=0, Total=1406 [2021-11-19 04:32:52,473 INFO L87 Difference]: Start difference. First operand 46 states and 51 transitions. Second operand has 38 states, 37 states have (on average 1.4594594594594594) internal successors, (54), 34 states have internal predecessors, (54), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 04:32:53,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:32:53,314 INFO L93 Difference]: Finished difference Result 57 states and 62 transitions. [2021-11-19 04:32:53,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-19 04:32:53,315 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 1.4594594594594594) internal successors, (54), 34 states have internal predecessors, (54), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2021-11-19 04:32:53,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:32:53,316 INFO L225 Difference]: With dead ends: 57 [2021-11-19 04:32:53,316 INFO L226 Difference]: Without dead ends: 57 [2021-11-19 04:32:53,317 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=192, Invalid=2160, Unknown=0, NotChecked=0, Total=2352 [2021-11-19 04:32:53,318 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 11 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 113 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:32:53,318 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 213 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 159 Invalid, 0 Unknown, 113 Unchecked, 0.1s Time] [2021-11-19 04:32:53,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-11-19 04:32:53,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 54. [2021-11-19 04:32:53,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 46 states have (on average 1.173913043478261) internal successors, (54), 48 states have internal predecessors, (54), 4 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 04:32:53,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 59 transitions. [2021-11-19 04:32:53,322 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 59 transitions. Word has length 25 [2021-11-19 04:32:53,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:32:53,323 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 59 transitions. [2021-11-19 04:32:53,323 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 1.4594594594594594) internal successors, (54), 34 states have internal predecessors, (54), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 04:32:53,323 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 59 transitions. [2021-11-19 04:32:53,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-19 04:32:53,324 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:32:53,324 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:32:53,367 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0566fbfe-7b88-4fd4-9343-ef7414c6021f/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-19 04:32:53,545 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0566fbfe-7b88-4fd4-9343-ef7414c6021f/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-19 04:32:53,545 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting cstrncpyErr1REQUIRES_VIOLATION === [cstrncpyErr0REQUIRES_VIOLATION, cstrncpyErr1REQUIRES_VIOLATION, cstrncpyErr2REQUIRES_VIOLATION, cstrncpyErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-19 04:32:53,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:32:53,545 INFO L85 PathProgramCache]: Analyzing trace with hash 1772830859, now seen corresponding path program 1 times [2021-11-19 04:32:53,546 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:32:53,546 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431073444] [2021-11-19 04:32:53,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:32:53,546 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:32:53,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:32:53,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 04:32:53,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:32:53,747 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:32:53,747 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:32:53,747 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431073444] [2021-11-19 04:32:53,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431073444] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:32:53,748 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201374636] [2021-11-19 04:32:53,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:32:53,748 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:32:53,748 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0566fbfe-7b88-4fd4-9343-ef7414c6021f/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:32:53,749 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0566fbfe-7b88-4fd4-9343-ef7414c6021f/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:32:53,786 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0566fbfe-7b88-4fd4-9343-ef7414c6021f/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-19 04:32:53,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:32:53,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-19 04:32:53,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:32:54,156 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:32:54,156 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:32:54,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-19 04:32:54,491 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:32:54,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1201374636] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:32:54,492 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:32:54,492 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 26 [2021-11-19 04:32:54,493 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407486743] [2021-11-19 04:32:54,493 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:32:54,494 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-19 04:32:54,494 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:32:54,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-19 04:32:54,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=617, Unknown=0, NotChecked=0, Total=702 [2021-11-19 04:32:54,496 INFO L87 Difference]: Start difference. First operand 54 states and 59 transitions. Second operand has 27 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 04:32:55,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:32:55,209 INFO L93 Difference]: Finished difference Result 77 states and 83 transitions. [2021-11-19 04:32:55,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-19 04:32:55,210 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2021-11-19 04:32:55,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:32:55,211 INFO L225 Difference]: With dead ends: 77 [2021-11-19 04:32:55,211 INFO L226 Difference]: Without dead ends: 77 [2021-11-19 04:32:55,212 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=210, Invalid=1196, Unknown=0, NotChecked=0, Total=1406 [2021-11-19 04:32:55,213 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 210 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 537 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 561 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 537 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 04:32:55,213 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [210 Valid, 102 Invalid, 561 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 537 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-19 04:32:55,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-11-19 04:32:55,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 58. [2021-11-19 04:32:55,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 50 states have (on average 1.16) internal successors, (58), 52 states have internal predecessors, (58), 4 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 04:32:55,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 63 transitions. [2021-11-19 04:32:55,217 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 63 transitions. Word has length 26 [2021-11-19 04:32:55,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:32:55,218 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 63 transitions. [2021-11-19 04:32:55,218 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 04:32:55,218 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 63 transitions. [2021-11-19 04:32:55,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-19 04:32:55,221 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:32:55,221 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:32:55,264 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0566fbfe-7b88-4fd4-9343-ef7414c6021f/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-19 04:32:55,443 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0566fbfe-7b88-4fd4-9343-ef7414c6021f/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-19 04:32:55,443 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting cstrncpyErr3REQUIRES_VIOLATION === [cstrncpyErr0REQUIRES_VIOLATION, cstrncpyErr1REQUIRES_VIOLATION, cstrncpyErr2REQUIRES_VIOLATION, cstrncpyErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-19 04:32:55,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:32:55,443 INFO L85 PathProgramCache]: Analyzing trace with hash -876818260, now seen corresponding path program 1 times [2021-11-19 04:32:55,443 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:32:55,444 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336939758] [2021-11-19 04:32:55,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:32:55,444 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:32:55,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:32:55,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 04:32:55,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:32:55,755 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 04:32:55,755 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:32:55,755 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336939758] [2021-11-19 04:32:55,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336939758] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:32:55,756 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405696851] [2021-11-19 04:32:55,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:32:55,756 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:32:55,756 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0566fbfe-7b88-4fd4-9343-ef7414c6021f/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:32:55,757 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0566fbfe-7b88-4fd4-9343-ef7414c6021f/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:32:55,779 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0566fbfe-7b88-4fd4-9343-ef7414c6021f/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-19 04:32:55,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:32:55,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 39 conjunts are in the unsatisfiable core [2021-11-19 04:32:55,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:32:55,928 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-19 04:32:55,929 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 1 case distinctions, treesize of input 18 treesize of output 19 [2021-11-19 04:32:55,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-11-19 04:32:56,408 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 04:32:56,408 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:32:57,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 23 [2021-11-19 04:32:57,114 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 04:32:57,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [405696851] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:32:57,114 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:32:57,115 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 31 [2021-11-19 04:32:57,115 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566365155] [2021-11-19 04:32:57,115 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:32:57,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-19 04:32:57,116 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:32:57,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-19 04:32:57,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=884, Unknown=0, NotChecked=0, Total=992 [2021-11-19 04:32:57,117 INFO L87 Difference]: Start difference. First operand 58 states and 63 transitions. Second operand has 32 states, 31 states have (on average 1.967741935483871) internal successors, (61), 28 states have internal predecessors, (61), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 04:32:58,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:32:58,095 INFO L93 Difference]: Finished difference Result 61 states and 67 transitions. [2021-11-19 04:32:58,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-19 04:32:58,096 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 1.967741935483871) internal successors, (61), 28 states have internal predecessors, (61), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2021-11-19 04:32:58,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:32:58,096 INFO L225 Difference]: With dead ends: 61 [2021-11-19 04:32:58,097 INFO L226 Difference]: Without dead ends: 61 [2021-11-19 04:32:58,098 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=233, Invalid=1573, Unknown=0, NotChecked=0, Total=1806 [2021-11-19 04:32:58,099 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 113 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 494 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 494 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 04:32:58,099 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 108 Invalid, 521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 494 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-19 04:32:58,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-11-19 04:32:58,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 59. [2021-11-19 04:32:58,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 51 states have (on average 1.1568627450980393) internal successors, (59), 53 states have internal predecessors, (59), 4 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 04:32:58,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 64 transitions. [2021-11-19 04:32:58,104 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 64 transitions. Word has length 27 [2021-11-19 04:32:58,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:32:58,104 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 64 transitions. [2021-11-19 04:32:58,104 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 1.967741935483871) internal successors, (61), 28 states have internal predecessors, (61), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 04:32:58,104 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 64 transitions. [2021-11-19 04:32:58,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-19 04:32:58,105 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:32:58,105 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:32:58,150 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0566fbfe-7b88-4fd4-9343-ef7414c6021f/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-19 04:32:58,323 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0566fbfe-7b88-4fd4-9343-ef7414c6021f/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:32:58,323 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting cstrncpyErr5REQUIRES_VIOLATION === [cstrncpyErr0REQUIRES_VIOLATION, cstrncpyErr1REQUIRES_VIOLATION, cstrncpyErr2REQUIRES_VIOLATION, cstrncpyErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-19 04:32:58,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:32:58,323 INFO L85 PathProgramCache]: Analyzing trace with hash -1316504664, now seen corresponding path program 1 times [2021-11-19 04:32:58,323 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:32:58,323 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895812220] [2021-11-19 04:32:58,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:32:58,324 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:32:58,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:32:58,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 04:32:58,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:32:58,700 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 04:32:58,701 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:32:58,702 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895812220] [2021-11-19 04:32:58,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895812220] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:32:58,703 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080784657] [2021-11-19 04:32:58,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:32:58,703 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:32:58,703 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0566fbfe-7b88-4fd4-9343-ef7414c6021f/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:32:58,704 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0566fbfe-7b88-4fd4-9343-ef7414c6021f/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:32:58,730 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0566fbfe-7b88-4fd4-9343-ef7414c6021f/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-19 04:32:58,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:32:58,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 55 conjunts are in the unsatisfiable core [2021-11-19 04:32:58,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:32:58,958 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-19 04:32:58,958 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 1 case distinctions, treesize of input 18 treesize of output 19 [2021-11-19 04:32:58,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-11-19 04:32:59,441 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 04:32:59,442 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:33:00,325 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 04:33:00,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1080784657] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:33:00,326 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:33:00,326 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 31 [2021-11-19 04:33:00,326 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810024887] [2021-11-19 04:33:00,326 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:33:00,327 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-19 04:33:00,327 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:33:00,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-19 04:33:00,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=891, Unknown=0, NotChecked=0, Total=992 [2021-11-19 04:33:00,329 INFO L87 Difference]: Start difference. First operand 59 states and 64 transitions. Second operand has 32 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 29 states have internal predecessors, (57), 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) [2021-11-19 04:33:02,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:33:02,791 INFO L93 Difference]: Finished difference Result 96 states and 103 transitions. [2021-11-19 04:33:02,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-19 04:33:02,792 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 29 states have internal predecessors, (57), 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 29 [2021-11-19 04:33:02,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:33:02,793 INFO L225 Difference]: With dead ends: 96 [2021-11-19 04:33:02,793 INFO L226 Difference]: Without dead ends: 64 [2021-11-19 04:33:02,795 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 687 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=503, Invalid=3157, Unknown=0, NotChecked=0, Total=3660 [2021-11-19 04:33:02,795 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 210 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 685 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 779 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 685 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-19 04:33:02,796 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [210 Valid, 127 Invalid, 779 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 685 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-19 04:33:02,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-11-19 04:33:02,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 57. [2021-11-19 04:33:02,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 50 states have (on average 1.22) internal successors, (61), 52 states have internal predecessors, (61), 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) [2021-11-19 04:33:02,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 65 transitions. [2021-11-19 04:33:02,800 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 65 transitions. Word has length 29 [2021-11-19 04:33:02,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:33:02,800 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 65 transitions. [2021-11-19 04:33:02,801 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 29 states have internal predecessors, (57), 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) [2021-11-19 04:33:02,801 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 65 transitions. [2021-11-19 04:33:02,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-19 04:33:02,801 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:33:02,802 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:33:02,846 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0566fbfe-7b88-4fd4-9343-ef7414c6021f/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-19 04:33:03,021 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0566fbfe-7b88-4fd4-9343-ef7414c6021f/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:33:03,022 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting cstrncpyErr5REQUIRES_VIOLATION === [cstrncpyErr0REQUIRES_VIOLATION, cstrncpyErr1REQUIRES_VIOLATION, cstrncpyErr2REQUIRES_VIOLATION, cstrncpyErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-19 04:33:03,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:33:03,022 INFO L85 PathProgramCache]: Analyzing trace with hash 171689394, now seen corresponding path program 1 times [2021-11-19 04:33:03,022 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:33:03,022 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003928803] [2021-11-19 04:33:03,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:33:03,023 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:33:03,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:33:03,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 04:33:03,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:33:03,428 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 04:33:03,428 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:33:03,428 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003928803] [2021-11-19 04:33:03,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003928803] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:33:03,428 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274081273] [2021-11-19 04:33:03,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:33:03,429 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:33:03,429 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0566fbfe-7b88-4fd4-9343-ef7414c6021f/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:33:03,436 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0566fbfe-7b88-4fd4-9343-ef7414c6021f/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:33:03,451 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0566fbfe-7b88-4fd4-9343-ef7414c6021f/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-19 04:33:03,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:33:03,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 55 conjunts are in the unsatisfiable core [2021-11-19 04:33:03,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:33:03,691 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-19 04:33:03,692 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 1 case distinctions, treesize of input 18 treesize of output 19 [2021-11-19 04:33:03,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-11-19 04:33:04,197 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 04:33:04,198 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:33:05,103 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 04:33:05,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274081273] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:33:05,103 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:33:05,104 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 32 [2021-11-19 04:33:05,104 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327175973] [2021-11-19 04:33:05,104 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:33:05,105 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-19 04:33:05,105 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:33:05,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-19 04:33:05,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=952, Unknown=0, NotChecked=0, Total=1056 [2021-11-19 04:33:05,106 INFO L87 Difference]: Start difference. First operand 57 states and 65 transitions. Second operand has 33 states, 32 states have (on average 1.96875) internal successors, (63), 30 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) [2021-11-19 04:33:07,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:33:07,187 INFO L93 Difference]: Finished difference Result 71 states and 76 transitions. [2021-11-19 04:33:07,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-19 04:33:07,188 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 1.96875) internal successors, (63), 30 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 31 [2021-11-19 04:33:07,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:33:07,189 INFO L225 Difference]: With dead ends: 71 [2021-11-19 04:33:07,189 INFO L226 Difference]: Without dead ends: 68 [2021-11-19 04:33:07,191 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 608 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=418, Invalid=3004, Unknown=0, NotChecked=0, Total=3422 [2021-11-19 04:33:07,192 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 135 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 562 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 621 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 562 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-19 04:33:07,192 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 106 Invalid, 621 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 562 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-19 04:33:07,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-11-19 04:33:07,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 60. [2021-11-19 04:33:07,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 53 states have (on average 1.2264150943396226) internal successors, (65), 55 states have internal predecessors, (65), 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) [2021-11-19 04:33:07,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 69 transitions. [2021-11-19 04:33:07,196 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 69 transitions. Word has length 31 [2021-11-19 04:33:07,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:33:07,196 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 69 transitions. [2021-11-19 04:33:07,196 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 1.96875) internal successors, (63), 30 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) [2021-11-19 04:33:07,197 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 69 transitions. [2021-11-19 04:33:07,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-19 04:33:07,197 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:33:07,197 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:33:07,227 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0566fbfe-7b88-4fd4-9343-ef7414c6021f/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-19 04:33:07,398 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0566fbfe-7b88-4fd4-9343-ef7414c6021f/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:33:07,398 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting cstrncpyErr1REQUIRES_VIOLATION === [cstrncpyErr0REQUIRES_VIOLATION, cstrncpyErr1REQUIRES_VIOLATION, cstrncpyErr2REQUIRES_VIOLATION, cstrncpyErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-19 04:33:07,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:33:07,399 INFO L85 PathProgramCache]: Analyzing trace with hash 1045442185, now seen corresponding path program 2 times [2021-11-19 04:33:07,399 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:33:07,399 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831892564] [2021-11-19 04:33:07,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:33:07,400 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:33:07,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:33:07,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 04:33:07,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:33:07,827 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:33:07,827 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:33:07,827 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831892564] [2021-11-19 04:33:07,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831892564] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:33:07,828 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572143819] [2021-11-19 04:33:07,828 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 04:33:07,828 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:33:07,828 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0566fbfe-7b88-4fd4-9343-ef7414c6021f/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:33:07,831 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0566fbfe-7b88-4fd4-9343-ef7414c6021f/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:33:07,854 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0566fbfe-7b88-4fd4-9343-ef7414c6021f/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-19 04:33:07,961 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 04:33:07,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:33:07,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 54 conjunts are in the unsatisfiable core [2021-11-19 04:33:07,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:33:07,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-19 04:33:08,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-11-19 04:33:08,687 INFO L354 Elim1Store]: treesize reduction 34, result has 22.7 percent of original size [2021-11-19 04:33:08,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 40 [2021-11-19 04:33:09,018 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 04:33:09,019 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 35 treesize of output 35 [2021-11-19 04:33:09,251 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:33:09,251 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:33:10,316 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 194 treesize of output 182 [2021-11-19 04:33:10,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 156 treesize of output 152 [2021-11-19 04:33:10,615 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:33:10,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1572143819] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:33:10,616 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:33:10,616 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 42 [2021-11-19 04:33:10,616 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524082699] [2021-11-19 04:33:10,616 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:33:10,617 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-11-19 04:33:10,617 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:33:10,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-11-19 04:33:10,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=1590, Unknown=0, NotChecked=0, Total=1722 [2021-11-19 04:33:10,618 INFO L87 Difference]: Start difference. First operand 60 states and 69 transitions. Second operand has 42 states, 39 states have (on average 1.9230769230769231) internal successors, (75), 38 states have internal predecessors, (75), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 04:33:11,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:33:11,800 INFO L93 Difference]: Finished difference Result 82 states and 89 transitions. [2021-11-19 04:33:11,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-19 04:33:11,803 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 39 states have (on average 1.9230769230769231) internal successors, (75), 38 states have internal predecessors, (75), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2021-11-19 04:33:11,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:33:11,804 INFO L225 Difference]: With dead ends: 82 [2021-11-19 04:33:11,804 INFO L226 Difference]: Without dead ends: 68 [2021-11-19 04:33:11,806 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 548 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=314, Invalid=3468, Unknown=0, NotChecked=0, Total=3782 [2021-11-19 04:33:11,808 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 86 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 403 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 784 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 364 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 04:33:11,808 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 206 Invalid, 784 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 403 Invalid, 0 Unknown, 364 Unchecked, 0.3s Time] [2021-11-19 04:33:11,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-11-19 04:33:11,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 64. [2021-11-19 04:33:11,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 57 states have (on average 1.1929824561403508) internal successors, (68), 59 states have internal predecessors, (68), 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) [2021-11-19 04:33:11,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 72 transitions. [2021-11-19 04:33:11,813 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 72 transitions. Word has length 32 [2021-11-19 04:33:11,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:33:11,813 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 72 transitions. [2021-11-19 04:33:11,814 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 39 states have (on average 1.9230769230769231) internal successors, (75), 38 states have internal predecessors, (75), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 04:33:11,814 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 72 transitions. [2021-11-19 04:33:11,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-19 04:33:11,814 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:33:11,815 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:33:11,861 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0566fbfe-7b88-4fd4-9343-ef7414c6021f/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-19 04:33:12,031 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0566fbfe-7b88-4fd4-9343-ef7414c6021f/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:33:12,031 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting cstrncpyErr3REQUIRES_VIOLATION === [cstrncpyErr0REQUIRES_VIOLATION, cstrncpyErr1REQUIRES_VIOLATION, cstrncpyErr2REQUIRES_VIOLATION, cstrncpyErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-19 04:33:12,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:33:12,031 INFO L85 PathProgramCache]: Analyzing trace with hash -1166776143, now seen corresponding path program 2 times [2021-11-19 04:33:12,032 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:33:12,032 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16118067] [2021-11-19 04:33:12,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:33:12,032 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:33:12,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:33:12,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 04:33:12,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:33:12,462 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 04:33:12,462 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:33:12,462 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16118067] [2021-11-19 04:33:12,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16118067] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:33:12,462 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528055346] [2021-11-19 04:33:12,462 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 04:33:12,462 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:33:12,463 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0566fbfe-7b88-4fd4-9343-ef7414c6021f/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:33:12,467 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0566fbfe-7b88-4fd4-9343-ef7414c6021f/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:33:12,501 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0566fbfe-7b88-4fd4-9343-ef7414c6021f/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-19 04:33:12,764 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 04:33:12,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:33:12,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 53 conjunts are in the unsatisfiable core [2021-11-19 04:33:12,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:33:12,809 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-19 04:33:12,809 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 1 case distinctions, treesize of input 18 treesize of output 19 [2021-11-19 04:33:12,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-11-19 04:33:13,412 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 04:33:13,412 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:33:14,474 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 04:33:14,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1528055346] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:33:14,475 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:33:14,475 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 35 [2021-11-19 04:33:14,475 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852592043] [2021-11-19 04:33:14,476 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:33:14,476 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-19 04:33:14,476 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:33:14,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-19 04:33:14,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1138, Unknown=0, NotChecked=0, Total=1260 [2021-11-19 04:33:14,478 INFO L87 Difference]: Start difference. First operand 64 states and 72 transitions. Second operand has 36 states, 35 states have (on average 1.9714285714285715) internal successors, (69), 33 states have internal predecessors, (69), 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) [2021-11-19 04:33:16,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:33:16,778 INFO L93 Difference]: Finished difference Result 72 states and 77 transitions. [2021-11-19 04:33:16,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-19 04:33:16,779 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 1.9714285714285715) internal successors, (69), 33 states have internal predecessors, (69), 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 [2021-11-19 04:33:16,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:33:16,780 INFO L225 Difference]: With dead ends: 72 [2021-11-19 04:33:16,780 INFO L226 Difference]: Without dead ends: 72 [2021-11-19 04:33:16,782 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 581 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=420, Invalid=3002, Unknown=0, NotChecked=0, Total=3422 [2021-11-19 04:33:16,783 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 117 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 711 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 779 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 711 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-19 04:33:16,783 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 122 Invalid, 779 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 711 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-19 04:33:16,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-11-19 04:33:16,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 69. [2021-11-19 04:33:16,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 62 states have (on average 1.1612903225806452) internal successors, (72), 64 states have internal predecessors, (72), 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) [2021-11-19 04:33:16,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 76 transitions. [2021-11-19 04:33:16,787 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 76 transitions. Word has length 37 [2021-11-19 04:33:16,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:33:16,787 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 76 transitions. [2021-11-19 04:33:16,787 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 1.9714285714285715) internal successors, (69), 33 states have internal predecessors, (69), 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) [2021-11-19 04:33:16,788 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 76 transitions. [2021-11-19 04:33:16,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-19 04:33:16,788 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:33:16,788 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:33:16,836 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0566fbfe-7b88-4fd4-9343-ef7414c6021f/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-19 04:33:17,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0566fbfe-7b88-4fd4-9343-ef7414c6021f/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-11-19 04:33:17,007 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting cstrncpyErr1REQUIRES_VIOLATION === [cstrncpyErr0REQUIRES_VIOLATION, cstrncpyErr1REQUIRES_VIOLATION, cstrncpyErr2REQUIRES_VIOLATION, cstrncpyErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-19 04:33:17,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:33:17,007 INFO L85 PathProgramCache]: Analyzing trace with hash 1394594212, now seen corresponding path program 3 times [2021-11-19 04:33:17,007 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:33:17,008 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901632135] [2021-11-19 04:33:17,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:33:17,008 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:33:17,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:33:17,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 04:33:17,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:33:17,497 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:33:17,498 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:33:17,498 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901632135] [2021-11-19 04:33:17,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901632135] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:33:17,498 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296530683] [2021-11-19 04:33:17,498 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 04:33:17,498 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:33:17,499 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0566fbfe-7b88-4fd4-9343-ef7414c6021f/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:33:17,501 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0566fbfe-7b88-4fd4-9343-ef7414c6021f/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:33:17,518 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0566fbfe-7b88-4fd4-9343-ef7414c6021f/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-19 04:33:17,745 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-19 04:33:17,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:33:17,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 69 conjunts are in the unsatisfiable core [2021-11-19 04:33:17,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:33:17,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-19 04:33:17,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-19 04:33:18,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2021-11-19 04:33:18,249 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-19 04:33:18,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-11-19 04:33:18,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-19 04:33:18,338 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:33:18,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:33:27,336 WARN L838 $PredicateComparison]: unable to prove that (forall ((|cstrncpy_#t~post3.offset| Int) (|v_cstrncpy_#t~post3.offset_36| Int) (|cstrncpy_#t~mem5| Int) (|v_cstrncpy_#t~mem5_36| Int)) (= (select (select (store |c_#memory_int| c_cstrncpy_~d~0.base (store (store (select |c_#memory_int| c_cstrncpy_~d~0.base) |cstrncpy_#t~post3.offset| |cstrncpy_#t~mem5|) |v_cstrncpy_#t~post3.offset_36| |v_cstrncpy_#t~mem5_36|)) c_cstrncpy_~s~0.base) (+ c_cstrncpy_~s~0.offset 2)) 0)) is different from false [2021-11-19 04:33:28,124 WARN L838 $PredicateComparison]: unable to prove that (forall ((|cstrncpy_#t~post3.offset| Int) (|v_cstrncpy_#t~post3.offset_36| Int) (|cstrncpy_#t~mem5| Int) (|v_cstrncpy_#t~mem5_36| Int)) (= (select (select (store |c_#memory_int| c_cstrncpy_~dst.base (store (store (select |c_#memory_int| c_cstrncpy_~dst.base) |cstrncpy_#t~post3.offset| |cstrncpy_#t~mem5|) |v_cstrncpy_#t~post3.offset_36| |v_cstrncpy_#t~mem5_36|)) c_cstrncpy_~src.base) (+ c_cstrncpy_~src.offset 2)) 0)) is different from false [2021-11-19 04:33:28,686 WARN L838 $PredicateComparison]: unable to prove that (forall ((|cstrncpy_#t~post3.offset| Int) (|v_cstrncpy_#t~post3.offset_36| Int) (|cstrncpy_#t~mem5| Int) (|v_cstrncpy_#t~mem5_36| Int)) (= (select (select (store |c_#memory_int| |c_cstrncpy_#in~dst.base| (store (store (select |c_#memory_int| |c_cstrncpy_#in~dst.base|) |cstrncpy_#t~post3.offset| |cstrncpy_#t~mem5|) |v_cstrncpy_#t~post3.offset_36| |v_cstrncpy_#t~mem5_36|)) |c_cstrncpy_#in~src.base|) (+ 2 |c_cstrncpy_#in~src.offset|)) 0)) is different from false [2021-11-19 04:33:34,376 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 754 treesize of output 730 [2021-11-19 04:33:35,640 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2021-11-19 04:33:35,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1296530683] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:33:35,640 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:33:35,640 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17, 17] total 38 [2021-11-19 04:33:35,641 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890608631] [2021-11-19 04:33:35,641 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:33:35,643 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-11-19 04:33:35,643 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:33:35,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-11-19 04:33:35,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1070, Unknown=17, NotChecked=204, Total=1406 [2021-11-19 04:33:35,645 INFO L87 Difference]: Start difference. First operand 69 states and 76 transitions. Second operand has 38 states, 36 states have (on average 2.1944444444444446) internal successors, (79), 35 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) [2021-11-19 04:33:38,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:33:38,709 INFO L93 Difference]: Finished difference Result 96 states and 104 transitions. [2021-11-19 04:33:38,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-19 04:33:38,709 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 36 states have (on average 2.1944444444444446) internal successors, (79), 35 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 42 [2021-11-19 04:33:38,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:33:38,710 INFO L225 Difference]: With dead ends: 96 [2021-11-19 04:33:38,710 INFO L226 Difference]: Without dead ends: 96 [2021-11-19 04:33:38,711 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 65 SyntacticMatches, 4 SemanticMatches, 52 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 473 ImplicationChecksByTransitivity, 19.1s TimeCoverageRelationStatistics Valid=233, Invalid=2311, Unknown=18, NotChecked=300, Total=2862 [2021-11-19 04:33:38,712 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 63 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 690 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 999 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 690 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 283 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-19 04:33:38,712 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 148 Invalid, 999 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 690 Invalid, 0 Unknown, 283 Unchecked, 0.5s Time] [2021-11-19 04:33:38,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-11-19 04:33:38,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 93. [2021-11-19 04:33:38,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 85 states have (on average 1.1294117647058823) internal successors, (96), 87 states have internal predecessors, (96), 4 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 04:33:38,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 101 transitions. [2021-11-19 04:33:38,717 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 101 transitions. Word has length 42 [2021-11-19 04:33:38,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:33:38,718 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 101 transitions. [2021-11-19 04:33:38,718 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 36 states have (on average 2.1944444444444446) internal successors, (79), 35 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) [2021-11-19 04:33:38,718 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 101 transitions. [2021-11-19 04:33:38,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-19 04:33:38,719 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:33:38,719 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:33:38,754 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0566fbfe-7b88-4fd4-9343-ef7414c6021f/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-11-19 04:33:38,935 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0566fbfe-7b88-4fd4-9343-ef7414c6021f/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:33:38,936 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting cstrncpyErr1REQUIRES_VIOLATION === [cstrncpyErr0REQUIRES_VIOLATION, cstrncpyErr1REQUIRES_VIOLATION, cstrncpyErr2REQUIRES_VIOLATION, cstrncpyErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-19 04:33:38,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:33:38,936 INFO L85 PathProgramCache]: Analyzing trace with hash -1764202815, now seen corresponding path program 4 times [2021-11-19 04:33:38,936 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:33:38,936 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769688320] [2021-11-19 04:33:38,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:33:38,937 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:33:38,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:33:39,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 04:33:39,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:33:39,296 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:33:39,297 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:33:39,297 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769688320] [2021-11-19 04:33:39,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769688320] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:33:39,297 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563322934] [2021-11-19 04:33:39,298 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-19 04:33:39,298 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:33:39,298 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0566fbfe-7b88-4fd4-9343-ef7414c6021f/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:33:39,299 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0566fbfe-7b88-4fd4-9343-ef7414c6021f/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:33:39,328 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0566fbfe-7b88-4fd4-9343-ef7414c6021f/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-19 04:33:39,482 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-19 04:33:39,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:33:39,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 59 conjunts are in the unsatisfiable core [2021-11-19 04:33:39,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:33:39,518 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-19 04:33:39,519 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-19 04:33:39,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-19 04:33:39,857 INFO L354 Elim1Store]: treesize reduction 25, result has 47.9 percent of original size [2021-11-19 04:33:39,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 39 [2021-11-19 04:33:40,128 INFO L354 Elim1Store]: treesize reduction 25, result has 47.9 percent of original size [2021-11-19 04:33:40,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 49 [2021-11-19 04:33:40,398 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 04:33:40,399 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 31 treesize of output 31 [2021-11-19 04:33:40,574 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-19 04:33:40,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:33:46,227 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 781 treesize of output 757 [2021-11-19 04:33:48,176 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-19 04:33:48,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1563322934] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:33:48,177 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:33:48,177 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 16] total 43 [2021-11-19 04:33:48,177 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320769186] [2021-11-19 04:33:48,177 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:33:48,178 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-11-19 04:33:48,178 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:33:48,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-11-19 04:33:48,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=1733, Unknown=1, NotChecked=0, Total=1892 [2021-11-19 04:33:48,180 INFO L87 Difference]: Start difference. First operand 93 states and 101 transitions. Second operand has 44 states, 40 states have (on average 2.425) internal successors, (97), 40 states have internal predecessors, (97), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 04:33:51,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:33:51,585 INFO L93 Difference]: Finished difference Result 112 states and 118 transitions. [2021-11-19 04:33:51,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-11-19 04:33:51,586 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 40 states have (on average 2.425) internal successors, (97), 40 states have internal predecessors, (97), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2021-11-19 04:33:51,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:33:51,588 INFO L225 Difference]: With dead ends: 112 [2021-11-19 04:33:51,588 INFO L226 Difference]: Without dead ends: 112 [2021-11-19 04:33:51,591 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 67 SyntacticMatches, 2 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1150 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=759, Invalid=5720, Unknown=1, NotChecked=0, Total=6480 [2021-11-19 04:33:51,592 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 129 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 1181 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 1622 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 1181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 357 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-19 04:33:51,593 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 161 Invalid, 1622 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 1181 Invalid, 0 Unknown, 357 Unchecked, 0.9s Time] [2021-11-19 04:33:51,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-11-19 04:33:51,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 92. [2021-11-19 04:33:51,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 85 states have (on average 1.0941176470588236) internal successors, (93), 86 states have internal predecessors, (93), 4 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 04:33:51,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 98 transitions. [2021-11-19 04:33:51,598 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 98 transitions. Word has length 46 [2021-11-19 04:33:51,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:33:51,598 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 98 transitions. [2021-11-19 04:33:51,599 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 40 states have (on average 2.425) internal successors, (97), 40 states have internal predecessors, (97), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 04:33:51,599 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 98 transitions. [2021-11-19 04:33:51,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-19 04:33:51,600 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:33:51,600 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:33:51,647 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0566fbfe-7b88-4fd4-9343-ef7414c6021f/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-19 04:33:51,819 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0566fbfe-7b88-4fd4-9343-ef7414c6021f/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-11-19 04:33:51,819 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting cstrncpyErr5REQUIRES_VIOLATION === [cstrncpyErr0REQUIRES_VIOLATION, cstrncpyErr1REQUIRES_VIOLATION, cstrncpyErr2REQUIRES_VIOLATION, cstrncpyErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-19 04:33:51,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:33:51,819 INFO L85 PathProgramCache]: Analyzing trace with hash -438640473, now seen corresponding path program 1 times [2021-11-19 04:33:51,819 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:33:51,819 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717207228] [2021-11-19 04:33:51,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:33:51,820 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:33:51,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:33:52,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 04:33:52,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:33:52,458 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 04:33:52,458 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:33:52,458 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717207228] [2021-11-19 04:33:52,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717207228] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:33:52,459 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211724912] [2021-11-19 04:33:52,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:33:52,459 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:33:52,459 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0566fbfe-7b88-4fd4-9343-ef7414c6021f/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:33:52,460 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0566fbfe-7b88-4fd4-9343-ef7414c6021f/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:33:52,461 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0566fbfe-7b88-4fd4-9343-ef7414c6021f/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-19 04:33:52,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:33:52,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 79 conjunts are in the unsatisfiable core [2021-11-19 04:33:52,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:33:52,647 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-19 04:33:52,647 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 1 case distinctions, treesize of input 18 treesize of output 19 [2021-11-19 04:33:52,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-11-19 04:33:53,595 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 04:33:53,596 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:33:55,019 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 04:33:55,019 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1211724912] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:33:55,019 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:33:55,020 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18, 18] total 54 [2021-11-19 04:33:55,020 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825871892] [2021-11-19 04:33:55,020 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:33:55,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-11-19 04:33:55,021 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:33:55,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-11-19 04:33:55,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=266, Invalid=2704, Unknown=0, NotChecked=0, Total=2970 [2021-11-19 04:33:55,023 INFO L87 Difference]: Start difference. First operand 92 states and 98 transitions. Second operand has 55 states, 54 states have (on average 2.111111111111111) internal successors, (114), 51 states have internal predecessors, (114), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 04:33:58,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:33:58,503 INFO L93 Difference]: Finished difference Result 104 states and 110 transitions. [2021-11-19 04:33:58,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-11-19 04:33:58,504 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 54 states have (on average 2.111111111111111) internal successors, (114), 51 states have internal predecessors, (114), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 49 [2021-11-19 04:33:58,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:33:58,505 INFO L225 Difference]: With dead ends: 104 [2021-11-19 04:33:58,505 INFO L226 Difference]: Without dead ends: 64 [2021-11-19 04:33:58,508 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1871 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=933, Invalid=7257, Unknown=0, NotChecked=0, Total=8190 [2021-11-19 04:33:58,509 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 228 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 1290 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 1441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 1290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:33:58,510 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [228 Valid, 150 Invalid, 1441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 1290 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-19 04:33:58,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-11-19 04:33:58,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2021-11-19 04:33:58,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 58 states have (on average 1.0689655172413792) internal successors, (62), 59 states have internal predecessors, (62), 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) [2021-11-19 04:33:58,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 66 transitions. [2021-11-19 04:33:58,514 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 66 transitions. Word has length 49 [2021-11-19 04:33:58,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:33:58,514 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 66 transitions. [2021-11-19 04:33:58,516 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 54 states have (on average 2.111111111111111) internal successors, (114), 51 states have internal predecessors, (114), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 04:33:58,516 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 66 transitions. [2021-11-19 04:33:58,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-19 04:33:58,517 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:33:58,517 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:33:58,543 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0566fbfe-7b88-4fd4-9343-ef7414c6021f/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-19 04:33:58,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0566fbfe-7b88-4fd4-9343-ef7414c6021f/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-11-19 04:33:58,723 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting cstrncpyErr5REQUIRES_VIOLATION === [cstrncpyErr0REQUIRES_VIOLATION, cstrncpyErr1REQUIRES_VIOLATION, cstrncpyErr2REQUIRES_VIOLATION, cstrncpyErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-19 04:33:58,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:33:58,724 INFO L85 PathProgramCache]: Analyzing trace with hash 1556734590, now seen corresponding path program 2 times [2021-11-19 04:33:58,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:33:58,724 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722147787] [2021-11-19 04:33:58,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:33:58,724 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:33:58,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:33:59,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 04:33:59,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:33:59,041 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 41 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:33:59,041 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:33:59,041 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722147787] [2021-11-19 04:33:59,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722147787] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:33:59,041 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989682136] [2021-11-19 04:33:59,041 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 04:33:59,042 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:33:59,042 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0566fbfe-7b88-4fd4-9343-ef7414c6021f/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:33:59,047 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0566fbfe-7b88-4fd4-9343-ef7414c6021f/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:33:59,066 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0566fbfe-7b88-4fd4-9343-ef7414c6021f/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-19 04:33:59,202 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 04:33:59,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:33:59,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 42 conjunts are in the unsatisfiable core [2021-11-19 04:33:59,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:33:59,246 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-19 04:33:59,246 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-19 04:33:59,881 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 45 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:33:59,882 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:34:00,230 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 44 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:34:00,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1989682136] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:34:00,230 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:34:00,230 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 37 [2021-11-19 04:34:00,231 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485012001] [2021-11-19 04:34:00,231 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:34:00,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-11-19 04:34:00,231 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:34:00,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-11-19 04:34:00,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=1156, Unknown=0, NotChecked=0, Total=1332 [2021-11-19 04:34:00,232 INFO L87 Difference]: Start difference. First operand 64 states and 66 transitions. Second operand has 37 states, 36 states have (on average 3.138888888888889) internal successors, (113), 34 states have internal predecessors, (113), 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) [2021-11-19 04:34:01,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:34:01,069 INFO L93 Difference]: Finished difference Result 101 states and 103 transitions. [2021-11-19 04:34:01,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-19 04:34:01,069 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 3.138888888888889) internal successors, (113), 34 states have internal predecessors, (113), 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 57 [2021-11-19 04:34:01,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:34:01,070 INFO L225 Difference]: With dead ends: 101 [2021-11-19 04:34:01,070 INFO L226 Difference]: Without dead ends: 71 [2021-11-19 04:34:01,071 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 96 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 608 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=451, Invalid=2519, Unknown=0, NotChecked=0, Total=2970 [2021-11-19 04:34:01,072 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 129 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 536 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 568 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 536 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 04:34:01,072 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 91 Invalid, 568 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 536 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 04:34:01,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-11-19 04:34:01,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 68. [2021-11-19 04:34:01,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 62 states have (on average 1.064516129032258) internal successors, (66), 63 states have internal predecessors, (66), 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) [2021-11-19 04:34:01,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 70 transitions. [2021-11-19 04:34:01,075 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 70 transitions. Word has length 57 [2021-11-19 04:34:01,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:34:01,075 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 70 transitions. [2021-11-19 04:34:01,075 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 3.138888888888889) internal successors, (113), 34 states have internal predecessors, (113), 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) [2021-11-19 04:34:01,076 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 70 transitions. [2021-11-19 04:34:01,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-19 04:34:01,076 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:34:01,076 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:34:01,102 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0566fbfe-7b88-4fd4-9343-ef7414c6021f/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-19 04:34:01,276 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0566fbfe-7b88-4fd4-9343-ef7414c6021f/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-11-19 04:34:01,277 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting cstrncpyErr5REQUIRES_VIOLATION === [cstrncpyErr0REQUIRES_VIOLATION, cstrncpyErr1REQUIRES_VIOLATION, cstrncpyErr2REQUIRES_VIOLATION, cstrncpyErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-19 04:34:01,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:34:01,277 INFO L85 PathProgramCache]: Analyzing trace with hash -1514483775, now seen corresponding path program 3 times [2021-11-19 04:34:01,278 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:34:01,278 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138189914] [2021-11-19 04:34:01,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:34:01,278 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:34:01,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:34:01,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 04:34:01,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:34:01,807 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 26 proven. 26 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-19 04:34:01,808 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:34:01,808 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138189914] [2021-11-19 04:34:01,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138189914] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:34:01,808 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82245453] [2021-11-19 04:34:01,808 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 04:34:01,808 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:34:01,808 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0566fbfe-7b88-4fd4-9343-ef7414c6021f/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:34:01,809 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0566fbfe-7b88-4fd4-9343-ef7414c6021f/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:34:01,810 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0566fbfe-7b88-4fd4-9343-ef7414c6021f/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-19 04:34:02,616 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-19 04:34:02,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:34:02,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 83 conjunts are in the unsatisfiable core [2021-11-19 04:34:02,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:34:02,669 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-19 04:34:02,670 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 1 case distinctions, treesize of input 18 treesize of output 19 [2021-11-19 04:34:02,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-11-19 04:34:03,490 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-19 04:34:03,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:34:05,017 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-19 04:34:05,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [82245453] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:34:05,018 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:34:05,018 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17, 17] total 48 [2021-11-19 04:34:05,018 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22390704] [2021-11-19 04:34:05,018 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:34:05,019 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-11-19 04:34:05,019 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:34:05,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-11-19 04:34:05,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=250, Invalid=2102, Unknown=0, NotChecked=0, Total=2352 [2021-11-19 04:34:05,021 INFO L87 Difference]: Start difference. First operand 68 states and 70 transitions. Second operand has 49 states, 48 states have (on average 2.4375) internal successors, (117), 46 states have internal predecessors, (117), 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) [2021-11-19 04:34:07,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:34:07,587 INFO L93 Difference]: Finished difference Result 72 states and 74 transitions. [2021-11-19 04:34:07,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-19 04:34:07,588 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 48 states have (on average 2.4375) internal successors, (117), 46 states have internal predecessors, (117), 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 61 [2021-11-19 04:34:07,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:34:07,589 INFO L225 Difference]: With dead ends: 72 [2021-11-19 04:34:07,589 INFO L226 Difference]: Without dead ends: 66 [2021-11-19 04:34:07,590 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 94 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1533 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=763, Invalid=5557, Unknown=0, NotChecked=0, Total=6320 [2021-11-19 04:34:07,591 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 162 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 875 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 972 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 875 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-19 04:34:07,591 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 122 Invalid, 972 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 875 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-19 04:34:07,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-11-19 04:34:07,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 64. [2021-11-19 04:34:07,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 59 states have (on average 1.0508474576271187) internal successors, (62), 59 states have internal predecessors, (62), 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) [2021-11-19 04:34:07,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 66 transitions. [2021-11-19 04:34:07,596 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 66 transitions. Word has length 61 [2021-11-19 04:34:07,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:34:07,596 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 66 transitions. [2021-11-19 04:34:07,596 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 48 states have (on average 2.4375) internal successors, (117), 46 states have internal predecessors, (117), 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) [2021-11-19 04:34:07,597 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 66 transitions. [2021-11-19 04:34:07,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-19 04:34:07,597 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:34:07,598 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:34:07,650 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0566fbfe-7b88-4fd4-9343-ef7414c6021f/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-19 04:34:07,799 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0566fbfe-7b88-4fd4-9343-ef7414c6021f/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-11-19 04:34:07,799 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting cstrncpyErr3REQUIRES_VIOLATION === [cstrncpyErr0REQUIRES_VIOLATION, cstrncpyErr1REQUIRES_VIOLATION, cstrncpyErr2REQUIRES_VIOLATION, cstrncpyErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-19 04:34:07,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:34:07,799 INFO L85 PathProgramCache]: Analyzing trace with hash 1134191805, now seen corresponding path program 3 times [2021-11-19 04:34:07,799 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:34:07,799 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857963670] [2021-11-19 04:34:07,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:34:07,800 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:34:07,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:34:08,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 04:34:08,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:34:08,152 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 61 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:34:08,152 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:34:08,153 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857963670] [2021-11-19 04:34:08,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857963670] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:34:08,153 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112579403] [2021-11-19 04:34:08,153 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 04:34:08,153 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:34:08,153 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0566fbfe-7b88-4fd4-9343-ef7414c6021f/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:34:08,155 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0566fbfe-7b88-4fd4-9343-ef7414c6021f/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:34:08,156 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0566fbfe-7b88-4fd4-9343-ef7414c6021f/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-19 04:34:08,400 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-11-19 04:34:08,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:34:08,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 54 conjunts are in the unsatisfiable core [2021-11-19 04:34:08,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:34:08,443 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-19 04:34:08,444 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-19 04:34:09,154 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 70 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:34:09,154 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:34:09,761 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 70 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:34:09,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2112579403] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:34:09,762 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:34:09,762 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17, 17] total 44 [2021-11-19 04:34:09,762 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020026182] [2021-11-19 04:34:09,763 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:34:09,763 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-11-19 04:34:09,764 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:34:09,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-11-19 04:34:09,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=248, Invalid=1644, Unknown=0, NotChecked=0, Total=1892 [2021-11-19 04:34:09,765 INFO L87 Difference]: Start difference. First operand 64 states and 66 transitions. Second operand has 44 states, 43 states have (on average 3.1627906976744184) internal successors, (136), 40 states have internal predecessors, (136), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 04:34:10,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:34:10,525 INFO L93 Difference]: Finished difference Result 107 states and 109 transitions. [2021-11-19 04:34:10,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-19 04:34:10,526 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 3.1627906976744184) internal successors, (136), 40 states have internal predecessors, (136), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 63 [2021-11-19 04:34:10,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:34:10,527 INFO L225 Difference]: With dead ends: 107 [2021-11-19 04:34:10,527 INFO L226 Difference]: Without dead ends: 71 [2021-11-19 04:34:10,528 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 103 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 810 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=525, Invalid=3135, Unknown=0, NotChecked=0, Total=3660 [2021-11-19 04:34:10,529 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 118 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 508 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 508 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 04:34:10,530 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 100 Invalid, 534 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 508 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 04:34:10,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-11-19 04:34:10,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 68. [2021-11-19 04:34:10,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 63 states have (on average 1.0476190476190477) internal successors, (66), 63 states have internal predecessors, (66), 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) [2021-11-19 04:34:10,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 70 transitions. [2021-11-19 04:34:10,534 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 70 transitions. Word has length 63 [2021-11-19 04:34:10,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:34:10,534 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 70 transitions. [2021-11-19 04:34:10,535 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 3.1627906976744184) internal successors, (136), 40 states have internal predecessors, (136), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 04:34:10,535 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 70 transitions. [2021-11-19 04:34:10,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-19 04:34:10,536 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:34:10,536 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:34:10,582 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0566fbfe-7b88-4fd4-9343-ef7414c6021f/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-19 04:34:10,759 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0566fbfe-7b88-4fd4-9343-ef7414c6021f/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:34:10,759 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting cstrncpyErr3REQUIRES_VIOLATION === [cstrncpyErr0REQUIRES_VIOLATION, cstrncpyErr1REQUIRES_VIOLATION, cstrncpyErr2REQUIRES_VIOLATION, cstrncpyErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-19 04:34:10,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:34:10,759 INFO L85 PathProgramCache]: Analyzing trace with hash 363271104, now seen corresponding path program 4 times [2021-11-19 04:34:10,759 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:34:10,759 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213904920] [2021-11-19 04:34:10,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:34:10,760 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:34:10,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:34:11,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 04:34:11,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:34:11,440 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 26 proven. 49 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-19 04:34:11,441 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:34:11,441 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213904920] [2021-11-19 04:34:11,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213904920] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:34:11,441 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142745402] [2021-11-19 04:34:11,442 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-19 04:34:11,442 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:34:11,442 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0566fbfe-7b88-4fd4-9343-ef7414c6021f/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:34:11,446 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0566fbfe-7b88-4fd4-9343-ef7414c6021f/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:34:11,470 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0566fbfe-7b88-4fd4-9343-ef7414c6021f/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-19 04:34:11,718 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-19 04:34:11,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:34:11,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 105 conjunts are in the unsatisfiable core [2021-11-19 04:34:11,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:34:11,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-19 04:34:11,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-19 04:34:12,845 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 75 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-19 04:34:12,845 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:34:14,603 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 75 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-19 04:34:14,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [142745402] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:34:14,603 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:34:14,604 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19, 19] total 57 [2021-11-19 04:34:14,604 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811087133] [2021-11-19 04:34:14,604 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:34:14,605 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2021-11-19 04:34:14,605 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:34:14,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-11-19 04:34:14,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=312, Invalid=2994, Unknown=0, NotChecked=0, Total=3306 [2021-11-19 04:34:14,607 INFO L87 Difference]: Start difference. First operand 68 states and 70 transitions. Second operand has 58 states, 57 states have (on average 2.3157894736842106) internal successors, (132), 54 states have internal predecessors, (132), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 04:34:17,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:34:17,122 INFO L93 Difference]: Finished difference Result 74 states and 76 transitions. [2021-11-19 04:34:17,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-19 04:34:17,122 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 57 states have (on average 2.3157894736842106) internal successors, (132), 54 states have internal predecessors, (132), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 67 [2021-11-19 04:34:17,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:34:17,123 INFO L225 Difference]: With dead ends: 74 [2021-11-19 04:34:17,123 INFO L226 Difference]: Without dead ends: 0 [2021-11-19 04:34:17,124 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2002 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=883, Invalid=6773, Unknown=0, NotChecked=0, Total=7656 [2021-11-19 04:34:17,125 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 134 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 1008 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 1134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 1008 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-19 04:34:17,125 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 128 Invalid, 1134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 1008 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-19 04:34:17,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-11-19 04:34:17,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-11-19 04:34:17,126 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) [2021-11-19 04:34:17,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-11-19 04:34:17,126 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 67 [2021-11-19 04:34:17,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:34:17,126 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-11-19 04:34:17,126 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 57 states have (on average 2.3157894736842106) internal successors, (132), 54 states have internal predecessors, (132), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 04:34:17,127 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-11-19 04:34:17,127 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-11-19 04:34:17,129 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrncpyErr0REQUIRES_VIOLATION (10 of 11 remaining) [2021-11-19 04:34:17,129 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrncpyErr1REQUIRES_VIOLATION (9 of 11 remaining) [2021-11-19 04:34:17,130 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrncpyErr2REQUIRES_VIOLATION (8 of 11 remaining) [2021-11-19 04:34:17,130 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrncpyErr3REQUIRES_VIOLATION (7 of 11 remaining) [2021-11-19 04:34:17,130 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrncpyErr4REQUIRES_VIOLATION (6 of 11 remaining) [2021-11-19 04:34:17,130 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrncpyErr5REQUIRES_VIOLATION (5 of 11 remaining) [2021-11-19 04:34:17,131 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr0REQUIRES_VIOLATION (4 of 11 remaining) [2021-11-19 04:34:17,131 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr1REQUIRES_VIOLATION (3 of 11 remaining) [2021-11-19 04:34:17,131 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr2REQUIRES_VIOLATION (2 of 11 remaining) [2021-11-19 04:34:17,131 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr3REQUIRES_VIOLATION (1 of 11 remaining) [2021-11-19 04:34:17,131 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr4ENSURES_VIOLATIONMEMORY_LEAK (0 of 11 remaining) [2021-11-19 04:34:17,183 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0566fbfe-7b88-4fd4-9343-ef7414c6021f/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-19 04:34:17,356 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0566fbfe-7b88-4fd4-9343-ef7414c6021f/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:34:17,359 INFO L732 BasicCegarLoop]: Path program histogram: [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:34:17,361 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-19 04:34:17,365 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.11 04:34:17 BoogieIcfgContainer [2021-11-19 04:34:17,365 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-19 04:34:17,366 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-19 04:34:17,366 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-19 04:34:17,366 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-19 04:34:17,367 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:32:42" (3/4) ... [2021-11-19 04:34:17,371 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-11-19 04:34:17,380 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure cstrncpy [2021-11-19 04:34:17,380 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2021-11-19 04:34:17,380 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __bswap_32 [2021-11-19 04:34:17,381 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __bswap_64 [2021-11-19 04:34:17,381 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __uint16_identity [2021-11-19 04:34:17,381 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __uint64_identity [2021-11-19 04:34:17,381 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2021-11-19 04:34:17,381 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __uint32_identity [2021-11-19 04:34:17,387 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 20 nodes and edges [2021-11-19 04:34:17,387 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2021-11-19 04:34:17,388 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-11-19 04:34:17,388 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-11-19 04:34:17,444 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0566fbfe-7b88-4fd4-9343-ef7414c6021f/bin/uautomizer-ZXIjhQolGL/witness.graphml [2021-11-19 04:34:17,445 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-19 04:34:17,446 INFO L158 Benchmark]: Toolchain (without parser) took 96784.13ms. Allocated memory was 111.1MB in the beginning and 153.1MB in the end (delta: 41.9MB). Free memory was 72.9MB in the beginning and 96.0MB in the end (delta: -23.2MB). Peak memory consumption was 17.9MB. Max. memory is 16.1GB. [2021-11-19 04:34:17,446 INFO L158 Benchmark]: CDTParser took 0.38ms. Allocated memory is still 111.1MB. Free memory is still 90.4MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-19 04:34:17,447 INFO L158 Benchmark]: CACSL2BoogieTranslator took 566.91ms. Allocated memory is still 111.1MB. Free memory was 72.7MB in the beginning and 78.9MB in the end (delta: -6.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-19 04:34:17,447 INFO L158 Benchmark]: Boogie Preprocessor took 57.99ms. Allocated memory is still 111.1MB. Free memory was 78.9MB in the beginning and 76.4MB in the end (delta: 2.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-19 04:34:17,447 INFO L158 Benchmark]: RCFGBuilder took 746.18ms. Allocated memory is still 111.1MB. Free memory was 76.4MB in the beginning and 56.6MB in the end (delta: 19.8MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. [2021-11-19 04:34:17,448 INFO L158 Benchmark]: TraceAbstraction took 95325.10ms. Allocated memory was 111.1MB in the beginning and 153.1MB in the end (delta: 41.9MB). Free memory was 56.2MB in the beginning and 99.9MB in the end (delta: -43.7MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-19 04:34:17,448 INFO L158 Benchmark]: Witness Printer took 79.32ms. Allocated memory is still 153.1MB. Free memory was 99.2MB in the beginning and 96.0MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-11-19 04:34:17,450 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.38ms. Allocated memory is still 111.1MB. Free memory is still 90.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 566.91ms. Allocated memory is still 111.1MB. Free memory was 72.7MB in the beginning and 78.9MB in the end (delta: -6.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Preprocessor took 57.99ms. Allocated memory is still 111.1MB. Free memory was 78.9MB in the beginning and 76.4MB in the end (delta: 2.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 746.18ms. Allocated memory is still 111.1MB. Free memory was 76.4MB in the beginning and 56.6MB in the end (delta: 19.8MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. * TraceAbstraction took 95325.10ms. Allocated memory was 111.1MB in the beginning and 153.1MB in the end (delta: 41.9MB). Free memory was 56.2MB in the beginning and 99.9MB in the end (delta: -43.7MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 79.32ms. Allocated memory is still 153.1MB. Free memory was 99.2MB in the beginning and 96.0MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * 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: 520]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 520]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 520]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 520]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 522]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 522]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 543]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 543]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 547]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 547]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 529]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 9 procedures, 61 locations, 11 error locations. Started 1 CEGAR loops. OverallTime: 95.2s, OverallIterations: 30, TraceHistogramMax: 6, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.1s, AutomataDifference: 31.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 3190 SdHoareTripleChecker+Valid, 9.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 3185 mSDsluCounter, 2761 SdHoareTripleChecker+Invalid, 8.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 1117 IncrementalHoareTripleChecker+Unchecked, 1871 mSDsCounter, 1053 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 12003 IncrementalHoareTripleChecker+Invalid, 14173 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1053 mSolverCounterUnsat, 890 mSDtfsCounter, 12003 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1980 GetRequests, 938 SyntacticMatches, 15 SemanticMatches, 1027 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 11822 ImplicationChecksByTransitivity, 55.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=96occurred in iteration=15, InterpolantAutomatonStates: 500, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 30 MinimizatonAttempts, 168 StatesRemovedByMinimization, 26 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 2.6s SatisfiabilityAnalysisTime, 56.0s InterpolantComputationTime, 1487 NumberOfCodeBlocks, 1487 NumberOfCodeBlocksAsserted, 62 NumberOfCheckSat, 2034 ConstructedInterpolants, 61 QuantifiedInterpolants, 24043 SizeOfPredicates, 304 NumberOfNonLiveVariables, 3363 ConjunctsInSsa, 840 ConjunctsInUnsatCore, 60 InterpolantComputations, 15 PerfectInterpolantSequences, 731/1562 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 11 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-11-19 04:34:17,478 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0566fbfe-7b88-4fd4-9343-ef7414c6021f/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE