./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 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f275f07d-780e-4f51-8688-e966b504fbd3/bin/uautomizer-AkOaLMaTGY/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f275f07d-780e-4f51-8688-e966b504fbd3/bin/uautomizer-AkOaLMaTGY/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f275f07d-780e-4f51-8688-e966b504fbd3/bin/uautomizer-AkOaLMaTGY/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f275f07d-780e-4f51-8688-e966b504fbd3/bin/uautomizer-AkOaLMaTGY/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_f275f07d-780e-4f51-8688-e966b504fbd3/bin/uautomizer-AkOaLMaTGY/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f275f07d-780e-4f51-8688-e966b504fbd3/bin/uautomizer-AkOaLMaTGY --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-47ea020 [2021-11-07 08:20:33,221 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 08:20:33,223 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 08:20:33,257 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 08:20:33,258 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 08:20:33,259 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 08:20:33,260 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 08:20:33,263 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 08:20:33,265 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 08:20:33,266 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 08:20:33,267 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 08:20:33,268 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 08:20:33,269 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 08:20:33,270 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 08:20:33,272 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 08:20:33,273 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 08:20:33,274 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 08:20:33,275 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 08:20:33,278 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 08:20:33,280 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 08:20:33,282 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 08:20:33,292 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 08:20:33,293 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 08:20:33,294 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 08:20:33,298 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 08:20:33,298 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 08:20:33,299 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 08:20:33,300 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 08:20:33,300 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 08:20:33,302 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 08:20:33,302 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 08:20:33,303 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 08:20:33,304 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 08:20:33,305 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 08:20:33,312 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 08:20:33,313 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 08:20:33,314 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 08:20:33,314 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 08:20:33,314 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 08:20:33,315 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 08:20:33,316 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 08:20:33,317 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f275f07d-780e-4f51-8688-e966b504fbd3/bin/uautomizer-AkOaLMaTGY/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-11-07 08:20:33,360 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 08:20:33,360 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 08:20:33,361 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-07 08:20:33,361 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-07 08:20:33,369 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-07 08:20:33,369 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-07 08:20:33,370 INFO L138 SettingsManager]: * Use SBE=true [2021-11-07 08:20:33,370 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 08:20:33,370 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 08:20:33,370 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-07 08:20:33,371 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 08:20:33,372 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 08:20:33,372 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 08:20:33,372 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-07 08:20:33,372 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-07 08:20:33,372 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-07 08:20:33,373 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 08:20:33,373 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 08:20:33,373 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 08:20:33,373 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 08:20:33,374 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 08:20:33,374 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 08:20:33,374 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 08:20:33,374 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 08:20:33,374 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 08:20:33,375 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 08:20:33,375 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-07 08:20:33,375 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 08:20:33,375 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 08:20:33,377 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_f275f07d-780e-4f51-8688-e966b504fbd3/bin/uautomizer-AkOaLMaTGY/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f275f07d-780e-4f51-8688-e966b504fbd3/bin/uautomizer-AkOaLMaTGY Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 57855fd15a600148bf8b2d693e60ae0827a95c157ed69e07e1c42c75fda7c9c4 [2021-11-07 08:20:33,679 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 08:20:33,704 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 08:20:33,707 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 08:20:33,709 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 08:20:33,710 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 08:20:33,711 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f275f07d-780e-4f51-8688-e966b504fbd3/bin/uautomizer-AkOaLMaTGY/../../sv-benchmarks/c/array-memsafety/openbsd_cstrncpy-alloca-2.i [2021-11-07 08:20:33,787 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f275f07d-780e-4f51-8688-e966b504fbd3/bin/uautomizer-AkOaLMaTGY/data/bbd5012d5/cd842dc3ca04480586a46e793e405c6d/FLAG1d59d6669 [2021-11-07 08:20:34,444 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 08:20:34,445 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f275f07d-780e-4f51-8688-e966b504fbd3/sv-benchmarks/c/array-memsafety/openbsd_cstrncpy-alloca-2.i [2021-11-07 08:20:34,461 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f275f07d-780e-4f51-8688-e966b504fbd3/bin/uautomizer-AkOaLMaTGY/data/bbd5012d5/cd842dc3ca04480586a46e793e405c6d/FLAG1d59d6669 [2021-11-07 08:20:34,673 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f275f07d-780e-4f51-8688-e966b504fbd3/bin/uautomizer-AkOaLMaTGY/data/bbd5012d5/cd842dc3ca04480586a46e793e405c6d [2021-11-07 08:20:34,676 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 08:20:34,678 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-11-07 08:20:34,680 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 08:20:34,680 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 08:20:34,684 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 08:20:34,685 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 08:20:34" (1/1) ... [2021-11-07 08:20:34,687 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d70d159 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:20:34, skipping insertion in model container [2021-11-07 08:20:34,687 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 08:20:34" (1/1) ... [2021-11-07 08:20:34,695 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 08:20:34,741 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 08:20:35,144 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 08:20:35,153 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 08:20:35,236 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 08:20:35,278 INFO L208 MainTranslator]: Completed translation [2021-11-07 08:20:35,279 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:20:35 WrapperNode [2021-11-07 08:20:35,280 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 08:20:35,281 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 08:20:35,281 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 08:20:35,282 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 08:20:35,296 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:20:35" (1/1) ... [2021-11-07 08:20:35,298 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:20:35" (1/1) ... [2021-11-07 08:20:35,320 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:20:35" (1/1) ... [2021-11-07 08:20:35,320 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:20:35" (1/1) ... [2021-11-07 08:20:35,335 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:20:35" (1/1) ... [2021-11-07 08:20:35,339 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:20:35" (1/1) ... [2021-11-07 08:20:35,343 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:20:35" (1/1) ... [2021-11-07 08:20:35,355 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 08:20:35,356 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 08:20:35,356 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 08:20:35,356 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 08:20:35,371 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:20:35" (1/1) ... [2021-11-07 08:20:35,384 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 08:20:35,396 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f275f07d-780e-4f51-8688-e966b504fbd3/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:20:35,416 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f275f07d-780e-4f51-8688-e966b504fbd3/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 08:20:35,442 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f275f07d-780e-4f51-8688-e966b504fbd3/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 08:20:35,475 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-11-07 08:20:35,475 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 08:20:35,475 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-11-07 08:20:35,476 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-11-07 08:20:35,476 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2021-11-07 08:20:35,476 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2021-11-07 08:20:35,476 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2021-11-07 08:20:35,477 INFO L138 BoogieDeclarations]: Found implementation of procedure cstrncpy [2021-11-07 08:20:35,477 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-11-07 08:20:35,478 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-11-07 08:20:35,478 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-11-07 08:20:35,479 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-11-07 08:20:35,479 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-11-07 08:20:35,479 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-11-07 08:20:35,479 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-11-07 08:20:35,479 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-11-07 08:20:35,480 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-11-07 08:20:35,480 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-11-07 08:20:35,480 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-11-07 08:20:35,480 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-11-07 08:20:35,480 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-11-07 08:20:35,481 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-11-07 08:20:35,481 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-11-07 08:20:35,481 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-11-07 08:20:35,481 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-11-07 08:20:35,481 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-11-07 08:20:35,481 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-11-07 08:20:35,482 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2021-11-07 08:20:35,482 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2021-11-07 08:20:35,482 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2021-11-07 08:20:35,482 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-11-07 08:20:35,483 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-11-07 08:20:35,483 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-11-07 08:20:35,483 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-11-07 08:20:35,483 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-11-07 08:20:35,483 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-11-07 08:20:35,483 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-11-07 08:20:35,484 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-11-07 08:20:35,484 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-11-07 08:20:35,484 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-11-07 08:20:35,484 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-11-07 08:20:35,484 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-11-07 08:20:35,485 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-11-07 08:20:35,485 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-11-07 08:20:35,485 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-11-07 08:20:35,485 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-11-07 08:20:35,485 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-11-07 08:20:35,486 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-11-07 08:20:35,486 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-11-07 08:20:35,486 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-11-07 08:20:35,486 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-11-07 08:20:35,487 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-11-07 08:20:35,487 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-11-07 08:20:35,488 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-11-07 08:20:35,488 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-11-07 08:20:35,488 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-11-07 08:20:35,489 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-11-07 08:20:35,489 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-11-07 08:20:35,489 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-11-07 08:20:35,489 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-11-07 08:20:35,489 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-11-07 08:20:35,489 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-11-07 08:20:35,490 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-11-07 08:20:35,490 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-11-07 08:20:35,490 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-11-07 08:20:35,490 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-11-07 08:20:35,491 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-11-07 08:20:35,491 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-11-07 08:20:35,492 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-11-07 08:20:35,492 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-11-07 08:20:35,493 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-11-07 08:20:35,493 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-11-07 08:20:35,493 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-11-07 08:20:35,494 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-11-07 08:20:35,494 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-11-07 08:20:35,494 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-11-07 08:20:35,494 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-11-07 08:20:35,494 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-11-07 08:20:35,495 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-11-07 08:20:35,495 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-11-07 08:20:35,495 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-11-07 08:20:35,495 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-11-07 08:20:35,496 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-11-07 08:20:35,496 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-11-07 08:20:35,496 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-11-07 08:20:35,496 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-11-07 08:20:35,497 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-11-07 08:20:35,497 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-11-07 08:20:35,497 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-11-07 08:20:35,497 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-11-07 08:20:35,497 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-11-07 08:20:35,498 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-11-07 08:20:35,498 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-11-07 08:20:35,498 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-11-07 08:20:35,498 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-11-07 08:20:35,498 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-11-07 08:20:35,499 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-11-07 08:20:35,499 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-11-07 08:20:35,499 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-11-07 08:20:35,499 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-11-07 08:20:35,499 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-11-07 08:20:35,499 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-11-07 08:20:35,500 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-11-07 08:20:35,500 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-11-07 08:20:35,500 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-11-07 08:20:35,501 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-11-07 08:20:35,501 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-11-07 08:20:35,501 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-11-07 08:20:35,501 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-11-07 08:20:35,502 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-11-07 08:20:35,502 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-11-07 08:20:35,502 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-11-07 08:20:35,503 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-11-07 08:20:35,503 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-11-07 08:20:35,504 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-11-07 08:20:35,504 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-11-07 08:20:35,504 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-11-07 08:20:35,504 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2021-11-07 08:20:35,504 INFO L130 BoogieDeclarations]: Found specification of procedure cstrncpy [2021-11-07 08:20:35,505 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-07 08:20:35,505 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-07 08:20:35,505 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-11-07 08:20:35,505 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 08:20:35,505 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-07 08:20:35,505 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-11-07 08:20:35,506 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 08:20:36,154 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 08:20:36,154 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-07 08:20:36,157 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 08:20:36 BoogieIcfgContainer [2021-11-07 08:20:36,157 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 08:20:36,159 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 08:20:36,159 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 08:20:36,163 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 08:20:36,164 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 08:20:34" (1/3) ... [2021-11-07 08:20:36,165 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3eb59c63 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 08:20:36, skipping insertion in model container [2021-11-07 08:20:36,165 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:20:35" (2/3) ... [2021-11-07 08:20:36,165 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3eb59c63 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 08:20:36, skipping insertion in model container [2021-11-07 08:20:36,165 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 08:20:36" (3/3) ... [2021-11-07 08:20:36,167 INFO L111 eAbstractionObserver]: Analyzing ICFG openbsd_cstrncpy-alloca-2.i [2021-11-07 08:20:36,173 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 08:20:36,174 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 11 error locations. [2021-11-07 08:20:36,226 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 08:20:36,234 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 [2021-11-07 08:20:36,234 INFO L340 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2021-11-07 08:20:36,252 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) [2021-11-07 08:20:36,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-07 08:20:36,261 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:20:36,262 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:20:36,262 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0REQUIRES_VIOLATION === [cstrncpyErr0REQUIRES_VIOLATION, cstrncpyErr1REQUIRES_VIOLATION, cstrncpyErr2REQUIRES_VIOLATION, cstrncpyErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-07 08:20:36,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:20:36,269 INFO L85 PathProgramCache]: Analyzing trace with hash -1701976042, now seen corresponding path program 1 times [2021-11-07 08:20:36,279 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:20:36,279 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932038629] [2021-11-07 08:20:36,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:20:36,281 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:20:36,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:20:36,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:20:36,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:20:36,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:20:36,601 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:20:36,602 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932038629] [2021-11-07 08:20:36,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932038629] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:20:36,603 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:20:36,603 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:20:36,605 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692592120] [2021-11-07 08:20:36,611 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:20:36,611 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:20:36,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:20:36,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:20:36,630 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) [2021-11-07 08:20:36,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:20:36,833 INFO L93 Difference]: Finished difference Result 44 states and 50 transitions. [2021-11-07 08:20:36,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 08:20:36,838 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 [2021-11-07 08:20:36,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:20:36,847 INFO L225 Difference]: With dead ends: 44 [2021-11-07 08:20:36,847 INFO L226 Difference]: Without dead ends: 41 [2021-11-07 08:20:36,849 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:20:36,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-11-07 08:20:36,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2021-11-07 08:20:36,886 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) [2021-11-07 08:20:36,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2021-11-07 08:20:36,889 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 11 [2021-11-07 08:20:36,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:20:36,890 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2021-11-07 08:20:36,890 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) [2021-11-07 08:20:36,891 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2021-11-07 08:20:36,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-07 08:20:36,891 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:20:36,892 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:20:36,892 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-07 08:20:36,892 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr1REQUIRES_VIOLATION === [cstrncpyErr0REQUIRES_VIOLATION, cstrncpyErr1REQUIRES_VIOLATION, cstrncpyErr2REQUIRES_VIOLATION, cstrncpyErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-07 08:20:36,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:20:36,893 INFO L85 PathProgramCache]: Analyzing trace with hash -1701976041, now seen corresponding path program 1 times [2021-11-07 08:20:36,894 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:20:36,894 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309153922] [2021-11-07 08:20:36,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:20:36,895 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:20:36,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:20:37,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:20:37,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:20:37,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:20:37,077 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:20:37,078 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309153922] [2021-11-07 08:20:37,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309153922] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:20:37,078 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:20:37,078 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 08:20:37,079 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858426173] [2021-11-07 08:20:37,080 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 08:20:37,080 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:20:37,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 08:20:37,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 08:20:37,082 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) [2021-11-07 08:20:37,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:20:37,240 INFO L93 Difference]: Finished difference Result 50 states and 57 transitions. [2021-11-07 08:20:37,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 08:20:37,240 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 [2021-11-07 08:20:37,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:20:37,243 INFO L225 Difference]: With dead ends: 50 [2021-11-07 08:20:37,243 INFO L226 Difference]: Without dead ends: 50 [2021-11-07 08:20:37,244 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-07 08:20:37,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-11-07 08:20:37,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 44. [2021-11-07 08:20:37,257 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) [2021-11-07 08:20:37,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 51 transitions. [2021-11-07 08:20:37,261 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 51 transitions. Word has length 11 [2021-11-07 08:20:37,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:20:37,261 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 51 transitions. [2021-11-07 08:20:37,261 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) [2021-11-07 08:20:37,262 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 51 transitions. [2021-11-07 08:20:37,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-07 08:20:37,264 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:20:37,264 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:20:37,265 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-07 08:20:37,265 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr1REQUIRES_VIOLATION === [cstrncpyErr0REQUIRES_VIOLATION, cstrncpyErr1REQUIRES_VIOLATION, cstrncpyErr2REQUIRES_VIOLATION, cstrncpyErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-07 08:20:37,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:20:37,266 INFO L85 PathProgramCache]: Analyzing trace with hash 1386828186, now seen corresponding path program 1 times [2021-11-07 08:20:37,266 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:20:37,267 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270523407] [2021-11-07 08:20:37,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:20:37,268 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:20:37,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:20:37,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:20:37,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:20:37,507 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:20:37,508 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:20:37,508 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270523407] [2021-11-07 08:20:37,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270523407] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:20:37,510 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050196382] [2021-11-07 08:20:37,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:20:37,512 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:20:37,512 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f275f07d-780e-4f51-8688-e966b504fbd3/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:20:37,514 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f275f07d-780e-4f51-8688-e966b504fbd3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:20:37,542 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f275f07d-780e-4f51-8688-e966b504fbd3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-07 08:20:37,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:20:37,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-07 08:20:37,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:20:37,806 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-07 08:20:37,807 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 [2021-11-07 08:20:38,002 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:20:38,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2050196382] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:20:38,003 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:20:38,003 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2021-11-07 08:20:38,003 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658174662] [2021-11-07 08:20:38,004 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 08:20:38,004 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:20:38,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 08:20:38,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-07 08:20:38,005 INFO L87 Difference]: Start difference. First operand 44 states and 51 transitions. Second operand has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:20:38,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:20:38,242 INFO L93 Difference]: Finished difference Result 49 states and 56 transitions. [2021-11-07 08:20:38,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 08:20:38,243 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (3), 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 [2021-11-07 08:20:38,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:20:38,247 INFO L225 Difference]: With dead ends: 49 [2021-11-07 08:20:38,247 INFO L226 Difference]: Without dead ends: 49 [2021-11-07 08:20:38,248 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-07 08:20:38,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-11-07 08:20:38,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 42. [2021-11-07 08:20:38,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 29 states have (on average 1.5172413793103448) internal successors, (44), 36 states have internal predecessors, (44), 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) [2021-11-07 08:20:38,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 49 transitions. [2021-11-07 08:20:38,270 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 49 transitions. Word has length 15 [2021-11-07 08:20:38,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:20:38,270 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 49 transitions. [2021-11-07 08:20:38,270 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:20:38,271 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 49 transitions. [2021-11-07 08:20:38,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-07 08:20:38,271 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:20:38,272 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:20:38,319 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f275f07d-780e-4f51-8688-e966b504fbd3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-07 08:20:38,472 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f275f07d-780e-4f51-8688-e966b504fbd3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:20:38,473 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr3REQUIRES_VIOLATION === [cstrncpyErr0REQUIRES_VIOLATION, cstrncpyErr1REQUIRES_VIOLATION, cstrncpyErr2REQUIRES_VIOLATION, cstrncpyErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-07 08:20:38,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:20:38,473 INFO L85 PathProgramCache]: Analyzing trace with hash 1386828133, now seen corresponding path program 1 times [2021-11-07 08:20:38,473 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:20:38,474 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130223151] [2021-11-07 08:20:38,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:20:38,475 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:20:38,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:20:38,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:20:38,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:20:38,575 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 08:20:38,576 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:20:38,576 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130223151] [2021-11-07 08:20:38,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130223151] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:20:38,577 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:20:38,577 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 08:20:38,577 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996409385] [2021-11-07 08:20:38,578 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 08:20:38,578 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:20:38,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 08:20:38,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:20:38,579 INFO L87 Difference]: Start difference. First operand 42 states and 49 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) [2021-11-07 08:20:38,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:20:38,676 INFO L93 Difference]: Finished difference Result 41 states and 48 transitions. [2021-11-07 08:20:38,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 08:20:38,677 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 [2021-11-07 08:20:38,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:20:38,678 INFO L225 Difference]: With dead ends: 41 [2021-11-07 08:20:38,678 INFO L226 Difference]: Without dead ends: 41 [2021-11-07 08:20:38,679 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-07 08:20:38,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-11-07 08:20:38,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2021-11-07 08:20:38,683 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) [2021-11-07 08:20:38,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2021-11-07 08:20:38,684 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 15 [2021-11-07 08:20:38,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:20:38,685 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2021-11-07 08:20:38,685 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) [2021-11-07 08:20:38,685 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2021-11-07 08:20:38,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-07 08:20:38,686 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:20:38,687 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:20:38,687 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-07 08:20:38,687 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting cstrncpyErr0REQUIRES_VIOLATION === [cstrncpyErr0REQUIRES_VIOLATION, cstrncpyErr1REQUIRES_VIOLATION, cstrncpyErr2REQUIRES_VIOLATION, cstrncpyErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-07 08:20:38,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:20:38,688 INFO L85 PathProgramCache]: Analyzing trace with hash -1459265875, now seen corresponding path program 1 times [2021-11-07 08:20:38,688 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:20:38,688 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868809264] [2021-11-07 08:20:38,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:20:38,689 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:20:38,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:20:38,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:20:38,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:20:38,802 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:20:38,803 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:20:38,803 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868809264] [2021-11-07 08:20:38,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868809264] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:20:38,803 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:20:38,804 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-07 08:20:38,804 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787589709] [2021-11-07 08:20:38,805 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 08:20:38,805 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:20:38,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 08:20:38,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-07 08:20:38,807 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) [2021-11-07 08:20:39,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:20:39,025 INFO L93 Difference]: Finished difference Result 41 states and 47 transitions. [2021-11-07 08:20:39,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 08:20:39,025 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 [2021-11-07 08:20:39,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:20:39,030 INFO L225 Difference]: With dead ends: 41 [2021-11-07 08:20:39,030 INFO L226 Difference]: Without dead ends: 41 [2021-11-07 08:20:39,030 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-11-07 08:20:39,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-11-07 08:20:39,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 38. [2021-11-07 08:20:39,040 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) [2021-11-07 08:20:39,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2021-11-07 08:20:39,044 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 16 [2021-11-07 08:20:39,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:20:39,044 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2021-11-07 08:20:39,044 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) [2021-11-07 08:20:39,045 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2021-11-07 08:20:39,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-07 08:20:39,045 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:20:39,046 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:20:39,046 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-07 08:20:39,046 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting cstrncpyErr1REQUIRES_VIOLATION === [cstrncpyErr0REQUIRES_VIOLATION, cstrncpyErr1REQUIRES_VIOLATION, cstrncpyErr2REQUIRES_VIOLATION, cstrncpyErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-07 08:20:39,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:20:39,047 INFO L85 PathProgramCache]: Analyzing trace with hash -1459265874, now seen corresponding path program 1 times [2021-11-07 08:20:39,047 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:20:39,048 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235800565] [2021-11-07 08:20:39,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:20:39,048 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:20:39,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:20:39,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:20:39,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:20:39,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:20:39,306 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:20:39,307 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235800565] [2021-11-07 08:20:39,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235800565] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:20:39,308 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:20:39,308 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-07 08:20:39,309 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297092236] [2021-11-07 08:20:39,313 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-07 08:20:39,321 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:20:39,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-07 08:20:39,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-11-07 08:20:39,323 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) [2021-11-07 08:20:39,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:20:39,625 INFO L93 Difference]: Finished difference Result 44 states and 51 transitions. [2021-11-07 08:20:39,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 08:20:39,625 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 [2021-11-07 08:20:39,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:20:39,626 INFO L225 Difference]: With dead ends: 44 [2021-11-07 08:20:39,626 INFO L226 Difference]: Without dead ends: 44 [2021-11-07 08:20:39,626 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-11-07 08:20:39,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-11-07 08:20:39,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 40. [2021-11-07 08:20:39,629 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) [2021-11-07 08:20:39,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 46 transitions. [2021-11-07 08:20:39,630 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 46 transitions. Word has length 16 [2021-11-07 08:20:39,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:20:39,630 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 46 transitions. [2021-11-07 08:20:39,630 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) [2021-11-07 08:20:39,630 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 46 transitions. [2021-11-07 08:20:39,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-07 08:20:39,631 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:20:39,631 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:20:39,631 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-07 08:20:39,631 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting cstrncpyErr2REQUIRES_VIOLATION === [cstrncpyErr0REQUIRES_VIOLATION, cstrncpyErr1REQUIRES_VIOLATION, cstrncpyErr2REQUIRES_VIOLATION, cstrncpyErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-07 08:20:39,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:20:39,632 INFO L85 PathProgramCache]: Analyzing trace with hash 2007398120, now seen corresponding path program 1 times [2021-11-07 08:20:39,632 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:20:39,632 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734413334] [2021-11-07 08:20:39,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:20:39,632 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:20:39,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:20:39,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:20:39,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:20:39,729 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:20:39,730 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:20:39,730 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734413334] [2021-11-07 08:20:39,730 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734413334] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:20:39,730 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:20:39,730 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-07 08:20:39,731 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600323935] [2021-11-07 08:20:39,731 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-07 08:20:39,731 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:20:39,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-07 08:20:39,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-11-07 08:20:39,732 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) [2021-11-07 08:20:39,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:20:39,944 INFO L93 Difference]: Finished difference Result 42 states and 48 transitions. [2021-11-07 08:20:39,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 08:20:39,944 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 [2021-11-07 08:20:39,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:20:39,945 INFO L225 Difference]: With dead ends: 42 [2021-11-07 08:20:39,945 INFO L226 Difference]: Without dead ends: 42 [2021-11-07 08:20:39,946 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2021-11-07 08:20:39,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-11-07 08:20:39,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 39. [2021-11-07 08:20:39,949 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) [2021-11-07 08:20:39,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2021-11-07 08:20:39,950 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 17 [2021-11-07 08:20:39,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:20:39,950 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2021-11-07 08:20:39,950 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) [2021-11-07 08:20:39,951 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2021-11-07 08:20:39,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-07 08:20:39,951 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:20:39,951 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:20:39,952 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-07 08:20:39,952 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting cstrncpyErr3REQUIRES_VIOLATION === [cstrncpyErr0REQUIRES_VIOLATION, cstrncpyErr1REQUIRES_VIOLATION, cstrncpyErr2REQUIRES_VIOLATION, cstrncpyErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-07 08:20:39,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:20:39,952 INFO L85 PathProgramCache]: Analyzing trace with hash 2007398121, now seen corresponding path program 1 times [2021-11-07 08:20:39,952 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:20:39,953 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841850145] [2021-11-07 08:20:39,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:20:39,953 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:20:39,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:20:40,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:20:40,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:20:40,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:20:40,094 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:20:40,094 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841850145] [2021-11-07 08:20:40,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841850145] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:20:40,095 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:20:40,095 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-07 08:20:40,095 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961643543] [2021-11-07 08:20:40,096 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-07 08:20:40,096 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:20:40,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-07 08:20:40,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-11-07 08:20:40,097 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) [2021-11-07 08:20:40,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:20:40,331 INFO L93 Difference]: Finished difference Result 41 states and 48 transitions. [2021-11-07 08:20:40,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 08:20:40,332 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 [2021-11-07 08:20:40,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:20:40,333 INFO L225 Difference]: With dead ends: 41 [2021-11-07 08:20:40,333 INFO L226 Difference]: Without dead ends: 41 [2021-11-07 08:20:40,333 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-11-07 08:20:40,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-11-07 08:20:40,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2021-11-07 08:20:40,336 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) [2021-11-07 08:20:40,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 46 transitions. [2021-11-07 08:20:40,337 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 46 transitions. Word has length 17 [2021-11-07 08:20:40,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:20:40,337 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 46 transitions. [2021-11-07 08:20:40,337 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) [2021-11-07 08:20:40,338 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 46 transitions. [2021-11-07 08:20:40,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-07 08:20:40,339 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:20:40,339 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:20:40,339 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-07 08:20:40,340 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr4ENSURES_VIOLATIONMEMORY_LEAK === [cstrncpyErr0REQUIRES_VIOLATION, cstrncpyErr1REQUIRES_VIOLATION, cstrncpyErr2REQUIRES_VIOLATION, cstrncpyErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-07 08:20:40,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:20:40,340 INFO L85 PathProgramCache]: Analyzing trace with hash 1969083859, now seen corresponding path program 1 times [2021-11-07 08:20:40,341 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:20:40,341 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319042759] [2021-11-07 08:20:40,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:20:40,341 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:20:40,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:20:40,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:20:40,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:20:40,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-07 08:20:40,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:20:40,425 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:20:40,425 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:20:40,425 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319042759] [2021-11-07 08:20:40,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319042759] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:20:40,426 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:20:40,426 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-07 08:20:40,426 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015033716] [2021-11-07 08:20:40,427 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 08:20:40,427 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:20:40,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 08:20:40,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-07 08:20:40,428 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) [2021-11-07 08:20:40,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:20:40,652 INFO L93 Difference]: Finished difference Result 62 states and 72 transitions. [2021-11-07 08:20:40,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-07 08:20:40,652 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 [2021-11-07 08:20:40,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:20:40,654 INFO L225 Difference]: With dead ends: 62 [2021-11-07 08:20:40,654 INFO L226 Difference]: Without dead ends: 62 [2021-11-07 08:20:40,654 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-11-07 08:20:40,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-11-07 08:20:40,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 50. [2021-11-07 08:20:40,660 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) [2021-11-07 08:20:40,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 58 transitions. [2021-11-07 08:20:40,661 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 58 transitions. Word has length 19 [2021-11-07 08:20:40,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:20:40,661 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 58 transitions. [2021-11-07 08:20:40,662 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) [2021-11-07 08:20:40,662 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 58 transitions. [2021-11-07 08:20:40,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-07 08:20:40,663 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:20:40,663 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:20:40,663 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-07 08:20:40,664 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr4ENSURES_VIOLATIONMEMORY_LEAK === [cstrncpyErr0REQUIRES_VIOLATION, cstrncpyErr1REQUIRES_VIOLATION, cstrncpyErr2REQUIRES_VIOLATION, cstrncpyErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-07 08:20:40,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:20:40,664 INFO L85 PathProgramCache]: Analyzing trace with hash -2067717999, now seen corresponding path program 1 times [2021-11-07 08:20:40,665 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:20:40,665 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039878933] [2021-11-07 08:20:40,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:20:40,665 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:20:40,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:20:40,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:20:40,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:20:40,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-07 08:20:40,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:20:40,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:20:40,810 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:20:40,811 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039878933] [2021-11-07 08:20:40,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039878933] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:20:40,811 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:20:40,811 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-07 08:20:40,812 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689424054] [2021-11-07 08:20:40,812 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 08:20:40,812 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:20:40,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 08:20:40,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-07 08:20:40,814 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) [2021-11-07 08:20:41,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:20:41,039 INFO L93 Difference]: Finished difference Result 59 states and 69 transitions. [2021-11-07 08:20:41,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-07 08:20:41,040 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 [2021-11-07 08:20:41,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:20:41,041 INFO L225 Difference]: With dead ends: 59 [2021-11-07 08:20:41,041 INFO L226 Difference]: Without dead ends: 56 [2021-11-07 08:20:41,042 INFO L786 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 [2021-11-07 08:20:41,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-11-07 08:20:41,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 40. [2021-11-07 08:20:41,058 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) [2021-11-07 08:20:41,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 45 transitions. [2021-11-07 08:20:41,060 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 45 transitions. Word has length 19 [2021-11-07 08:20:41,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:20:41,060 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 45 transitions. [2021-11-07 08:20:41,061 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) [2021-11-07 08:20:41,061 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 45 transitions. [2021-11-07 08:20:41,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-07 08:20:41,064 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:20:41,064 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:20:41,064 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-07 08:20:41,065 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting cstrncpyErr4REQUIRES_VIOLATION === [cstrncpyErr0REQUIRES_VIOLATION, cstrncpyErr1REQUIRES_VIOLATION, cstrncpyErr2REQUIRES_VIOLATION, cstrncpyErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-07 08:20:41,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:20:41,065 INFO L85 PathProgramCache]: Analyzing trace with hash -1069677202, now seen corresponding path program 1 times [2021-11-07 08:20:41,066 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:20:41,066 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040535171] [2021-11-07 08:20:41,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:20:41,066 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:20:41,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:20:41,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:20:41,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:20:41,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:20:41,131 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:20:41,131 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040535171] [2021-11-07 08:20:41,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040535171] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:20:41,132 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:20:41,132 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 08:20:41,132 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923961070] [2021-11-07 08:20:41,133 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 08:20:41,133 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:20:41,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 08:20:41,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-07 08:20:41,134 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) [2021-11-07 08:20:41,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:20:41,305 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2021-11-07 08:20:41,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 08:20:41,306 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 [2021-11-07 08:20:41,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:20:41,307 INFO L225 Difference]: With dead ends: 39 [2021-11-07 08:20:41,307 INFO L226 Difference]: Without dead ends: 39 [2021-11-07 08:20:41,308 INFO L786 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 [2021-11-07 08:20:41,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-11-07 08:20:41,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-11-07 08:20:41,312 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) [2021-11-07 08:20:41,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 44 transitions. [2021-11-07 08:20:41,313 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 44 transitions. Word has length 21 [2021-11-07 08:20:41,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:20:41,315 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 44 transitions. [2021-11-07 08:20:41,315 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) [2021-11-07 08:20:41,316 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 44 transitions. [2021-11-07 08:20:41,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-07 08:20:41,318 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:20:41,318 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:20:41,318 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-07 08:20:41,318 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting cstrncpyErr5REQUIRES_VIOLATION === [cstrncpyErr0REQUIRES_VIOLATION, cstrncpyErr1REQUIRES_VIOLATION, cstrncpyErr2REQUIRES_VIOLATION, cstrncpyErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-07 08:20:41,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:20:41,321 INFO L85 PathProgramCache]: Analyzing trace with hash -1069677201, now seen corresponding path program 1 times [2021-11-07 08:20:41,321 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:20:41,321 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112941020] [2021-11-07 08:20:41,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:20:41,322 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:20:41,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:20:41,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:20:41,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:20:41,481 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:20:41,481 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:20:41,482 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112941020] [2021-11-07 08:20:41,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112941020] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:20:41,482 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:20:41,482 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-07 08:20:41,483 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987298696] [2021-11-07 08:20:41,483 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 08:20:41,483 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:20:41,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 08:20:41,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-07 08:20:41,484 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) [2021-11-07 08:20:41,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:20:41,705 INFO L93 Difference]: Finished difference Result 74 states and 83 transitions. [2021-11-07 08:20:41,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 08:20:41,706 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 [2021-11-07 08:20:41,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:20:41,707 INFO L225 Difference]: With dead ends: 74 [2021-11-07 08:20:41,707 INFO L226 Difference]: Without dead ends: 74 [2021-11-07 08:20:41,707 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-11-07 08:20:41,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-11-07 08:20:41,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 67. [2021-11-07 08:20:41,711 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) [2021-11-07 08:20:41,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 80 transitions. [2021-11-07 08:20:41,712 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 80 transitions. Word has length 21 [2021-11-07 08:20:41,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:20:41,712 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 80 transitions. [2021-11-07 08:20:41,712 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) [2021-11-07 08:20:41,712 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 80 transitions. [2021-11-07 08:20:41,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-07 08:20:41,713 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:20:41,714 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:20:41,714 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-07 08:20:41,714 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting cstrncpyErr5REQUIRES_VIOLATION === [cstrncpyErr0REQUIRES_VIOLATION, cstrncpyErr1REQUIRES_VIOLATION, cstrncpyErr2REQUIRES_VIOLATION, cstrncpyErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-07 08:20:41,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:20:41,718 INFO L85 PathProgramCache]: Analyzing trace with hash -2080794451, now seen corresponding path program 1 times [2021-11-07 08:20:41,719 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:20:41,719 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186791980] [2021-11-07 08:20:41,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:20:41,719 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:20:41,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:20:41,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:20:42,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:20:42,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:20:42,003 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:20:42,003 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186791980] [2021-11-07 08:20:42,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186791980] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:20:42,003 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:20:42,003 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-11-07 08:20:42,004 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327816567] [2021-11-07 08:20:42,004 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 08:20:42,004 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:20:42,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 08:20:42,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-11-07 08:20:42,005 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) [2021-11-07 08:20:42,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:20:42,437 INFO L93 Difference]: Finished difference Result 74 states and 89 transitions. [2021-11-07 08:20:42,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-07 08:20:42,437 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 [2021-11-07 08:20:42,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:20:42,438 INFO L225 Difference]: With dead ends: 74 [2021-11-07 08:20:42,439 INFO L226 Difference]: Without dead ends: 74 [2021-11-07 08:20:42,439 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2021-11-07 08:20:42,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-11-07 08:20:42,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 71. [2021-11-07 08:20:42,443 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) [2021-11-07 08:20:42,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 86 transitions. [2021-11-07 08:20:42,445 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 86 transitions. Word has length 21 [2021-11-07 08:20:42,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:20:42,445 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 86 transitions. [2021-11-07 08:20:42,446 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) [2021-11-07 08:20:42,446 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 86 transitions. [2021-11-07 08:20:42,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-07 08:20:42,447 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:20:42,447 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:20:42,447 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-07 08:20:42,448 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting cstrncpyErr1REQUIRES_VIOLATION === [cstrncpyErr0REQUIRES_VIOLATION, cstrncpyErr1REQUIRES_VIOLATION, cstrncpyErr2REQUIRES_VIOLATION, cstrncpyErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-07 08:20:42,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:20:42,448 INFO L85 PathProgramCache]: Analyzing trace with hash 1217783404, now seen corresponding path program 1 times [2021-11-07 08:20:42,449 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:20:42,449 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676860617] [2021-11-07 08:20:42,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:20:42,449 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:20:42,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:20:42,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:20:42,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:20:42,566 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:20:42,567 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:20:42,567 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676860617] [2021-11-07 08:20:42,567 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676860617] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:20:42,567 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:20:42,568 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-07 08:20:42,568 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545827586] [2021-11-07 08:20:42,568 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 08:20:42,569 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:20:42,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 08:20:42,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-07 08:20:42,570 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) [2021-11-07 08:20:42,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:20:42,777 INFO L93 Difference]: Finished difference Result 66 states and 74 transitions. [2021-11-07 08:20:42,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 08:20:42,777 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 [2021-11-07 08:20:42,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:20:42,779 INFO L225 Difference]: With dead ends: 66 [2021-11-07 08:20:42,779 INFO L226 Difference]: Without dead ends: 66 [2021-11-07 08:20:42,779 INFO L786 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 [2021-11-07 08:20:42,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-11-07 08:20:42,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 63. [2021-11-07 08:20:42,782 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) [2021-11-07 08:20:42,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 72 transitions. [2021-11-07 08:20:42,783 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 72 transitions. Word has length 22 [2021-11-07 08:20:42,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:20:42,784 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 72 transitions. [2021-11-07 08:20:42,784 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) [2021-11-07 08:20:42,784 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 72 transitions. [2021-11-07 08:20:42,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-07 08:20:42,785 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:20:42,785 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:20:42,785 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-07 08:20:42,786 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting cstrncpyErr1REQUIRES_VIOLATION === [cstrncpyErr0REQUIRES_VIOLATION, cstrncpyErr1REQUIRES_VIOLATION, cstrncpyErr2REQUIRES_VIOLATION, cstrncpyErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-07 08:20:42,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:20:42,792 INFO L85 PathProgramCache]: Analyzing trace with hash -62080274, now seen corresponding path program 1 times [2021-11-07 08:20:42,792 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:20:42,792 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719842025] [2021-11-07 08:20:42,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:20:42,793 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:20:42,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:20:42,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:20:43,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:20:43,014 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:20:43,014 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:20:43,014 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719842025] [2021-11-07 08:20:43,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719842025] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:20:43,015 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:20:43,015 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-11-07 08:20:43,018 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618543369] [2021-11-07 08:20:43,018 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 08:20:43,019 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:20:43,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 08:20:43,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-11-07 08:20:43,021 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) [2021-11-07 08:20:43,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:20:43,390 INFO L93 Difference]: Finished difference Result 106 states and 118 transitions. [2021-11-07 08:20:43,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-07 08:20:43,391 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 [2021-11-07 08:20:43,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:20:43,392 INFO L225 Difference]: With dead ends: 106 [2021-11-07 08:20:43,393 INFO L226 Difference]: Without dead ends: 106 [2021-11-07 08:20:43,393 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2021-11-07 08:20:43,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-11-07 08:20:43,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 96. [2021-11-07 08:20:43,397 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) [2021-11-07 08:20:43,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 110 transitions. [2021-11-07 08:20:43,398 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 110 transitions. Word has length 22 [2021-11-07 08:20:43,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:20:43,399 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 110 transitions. [2021-11-07 08:20:43,399 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) [2021-11-07 08:20:43,399 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 110 transitions. [2021-11-07 08:20:43,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-07 08:20:43,400 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:20:43,400 INFO L513 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] [2021-11-07 08:20:43,400 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-07 08:20:43,400 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr4ENSURES_VIOLATIONMEMORY_LEAK === [cstrncpyErr0REQUIRES_VIOLATION, cstrncpyErr1REQUIRES_VIOLATION, cstrncpyErr2REQUIRES_VIOLATION, cstrncpyErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-07 08:20:43,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:20:43,401 INFO L85 PathProgramCache]: Analyzing trace with hash -1147417034, now seen corresponding path program 1 times [2021-11-07 08:20:43,401 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:20:43,401 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794846657] [2021-11-07 08:20:43,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:20:43,401 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:20:43,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:20:43,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:20:43,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:20:43,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-07 08:20:43,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:20:43,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:20:43,493 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:20:43,493 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794846657] [2021-11-07 08:20:43,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794846657] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:20:43,493 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:20:43,493 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 08:20:43,495 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499726192] [2021-11-07 08:20:43,496 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 08:20:43,496 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:20:43,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 08:20:43,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-07 08:20:43,497 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) [2021-11-07 08:20:43,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:20:43,603 INFO L93 Difference]: Finished difference Result 97 states and 111 transitions. [2021-11-07 08:20:43,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 08:20:43,603 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 [2021-11-07 08:20:43,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:20:43,604 INFO L225 Difference]: With dead ends: 97 [2021-11-07 08:20:43,605 INFO L226 Difference]: Without dead ends: 54 [2021-11-07 08:20:43,605 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-07 08:20:43,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-11-07 08:20:43,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 46. [2021-11-07 08:20:43,609 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) [2021-11-07 08:20:43,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2021-11-07 08:20:43,611 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 25 [2021-11-07 08:20:43,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:20:43,611 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2021-11-07 08:20:43,612 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) [2021-11-07 08:20:43,612 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2021-11-07 08:20:43,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-07 08:20:43,613 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:20:43,613 INFO L513 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] [2021-11-07 08:20:43,614 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-07 08:20:43,614 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting cstrncpyErr5REQUIRES_VIOLATION === [cstrncpyErr0REQUIRES_VIOLATION, cstrncpyErr1REQUIRES_VIOLATION, cstrncpyErr2REQUIRES_VIOLATION, cstrncpyErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-07 08:20:43,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:20:43,614 INFO L85 PathProgramCache]: Analyzing trace with hash 1189675621, now seen corresponding path program 1 times [2021-11-07 08:20:43,615 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:20:43,615 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647715608] [2021-11-07 08:20:43,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:20:43,615 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:20:43,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:20:44,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:20:44,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:20:44,046 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:20:44,047 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:20:44,047 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647715608] [2021-11-07 08:20:44,047 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647715608] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:20:44,047 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338207398] [2021-11-07 08:20:44,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:20:44,047 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:20:44,048 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f275f07d-780e-4f51-8688-e966b504fbd3/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:20:44,049 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f275f07d-780e-4f51-8688-e966b504fbd3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:20:44,076 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f275f07d-780e-4f51-8688-e966b504fbd3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-07 08:20:44,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:20:44,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 55 conjunts are in the unsatisfiable core [2021-11-07 08:20:44,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:20:44,322 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-07 08:20:44,323 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 [2021-11-07 08:20:44,330 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 [2021-11-07 08:20:44,822 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:20:44,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [338207398] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:20:44,823 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:20:44,823 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 20 [2021-11-07 08:20:44,824 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414337730] [2021-11-07 08:20:44,824 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-07 08:20:44,824 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:20:44,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-07 08:20:44,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=372, Unknown=0, NotChecked=0, Total=420 [2021-11-07 08:20:44,826 INFO L87 Difference]: Start difference. First operand 46 states and 51 transitions. Second operand has 21 states, 20 states have (on average 1.65) internal successors, (33), 19 states have internal predecessors, (33), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:20:46,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:20:46,510 INFO L93 Difference]: Finished difference Result 69 states and 75 transitions. [2021-11-07 08:20:46,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-07 08:20:46,510 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 1.65) internal successors, (33), 19 states have internal predecessors, (33), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2021-11-07 08:20:46,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:20:46,511 INFO L225 Difference]: With dead ends: 69 [2021-11-07 08:20:46,511 INFO L226 Difference]: Without dead ends: 48 [2021-11-07 08:20:46,512 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=225, Invalid=1335, Unknown=0, NotChecked=0, Total=1560 [2021-11-07 08:20:46,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-11-07 08:20:46,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 44. [2021-11-07 08:20:46,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 37 states have (on average 1.2432432432432432) internal successors, (46), 39 states have internal predecessors, (46), 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) [2021-11-07 08:20:46,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 50 transitions. [2021-11-07 08:20:46,516 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 50 transitions. Word has length 25 [2021-11-07 08:20:46,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:20:46,517 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 50 transitions. [2021-11-07 08:20:46,517 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 1.65) internal successors, (33), 19 states have internal predecessors, (33), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:20:46,517 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 50 transitions. [2021-11-07 08:20:46,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-07 08:20:46,520 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:20:46,520 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:20:46,559 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f275f07d-780e-4f51-8688-e966b504fbd3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-07 08:20:46,730 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f275f07d-780e-4f51-8688-e966b504fbd3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-07 08:20:46,731 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting cstrncpyErr1REQUIRES_VIOLATION === [cstrncpyErr0REQUIRES_VIOLATION, cstrncpyErr1REQUIRES_VIOLATION, cstrncpyErr2REQUIRES_VIOLATION, cstrncpyErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-07 08:20:46,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:20:46,731 INFO L85 PathProgramCache]: Analyzing trace with hash 1772830859, now seen corresponding path program 1 times [2021-11-07 08:20:46,731 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:20:46,731 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871095032] [2021-11-07 08:20:46,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:20:46,732 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:20:46,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:20:46,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:20:46,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:20:46,969 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:20:46,969 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:20:46,969 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871095032] [2021-11-07 08:20:46,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871095032] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:20:46,970 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497686350] [2021-11-07 08:20:46,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:20:46,970 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:20:46,970 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f275f07d-780e-4f51-8688-e966b504fbd3/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:20:46,971 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f275f07d-780e-4f51-8688-e966b504fbd3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:20:46,982 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f275f07d-780e-4f51-8688-e966b504fbd3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-07 08:20:47,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:20:47,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-07 08:20:47,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:20:47,450 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:20:47,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [497686350] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:20:47,451 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:20:47,451 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-11-07 08:20:47,451 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945991165] [2021-11-07 08:20:47,452 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-07 08:20:47,452 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:20:47,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-07 08:20:47,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-11-07 08:20:47,453 INFO L87 Difference]: Start difference. First operand 44 states and 50 transitions. Second operand has 20 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 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) [2021-11-07 08:20:47,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:20:47,903 INFO L93 Difference]: Finished difference Result 48 states and 52 transitions. [2021-11-07 08:20:47,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-07 08:20:47,904 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 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 26 [2021-11-07 08:20:47,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:20:47,905 INFO L225 Difference]: With dead ends: 48 [2021-11-07 08:20:47,905 INFO L226 Difference]: Without dead ends: 48 [2021-11-07 08:20:47,906 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=117, Invalid=585, Unknown=0, NotChecked=0, Total=702 [2021-11-07 08:20:47,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-11-07 08:20:47,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 44. [2021-11-07 08:20:47,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 37 states have (on average 1.2162162162162162) internal successors, (45), 39 states have internal predecessors, (45), 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) [2021-11-07 08:20:47,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 49 transitions. [2021-11-07 08:20:47,908 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 49 transitions. Word has length 26 [2021-11-07 08:20:47,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:20:47,909 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 49 transitions. [2021-11-07 08:20:47,909 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 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) [2021-11-07 08:20:47,909 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 49 transitions. [2021-11-07 08:20:47,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-07 08:20:47,910 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:20:47,910 INFO L513 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] [2021-11-07 08:20:47,938 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f275f07d-780e-4f51-8688-e966b504fbd3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-07 08:20:48,122 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f275f07d-780e-4f51-8688-e966b504fbd3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-07 08:20:48,123 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting cstrncpyErr3REQUIRES_VIOLATION === [cstrncpyErr0REQUIRES_VIOLATION, cstrncpyErr1REQUIRES_VIOLATION, cstrncpyErr2REQUIRES_VIOLATION, cstrncpyErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-07 08:20:48,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:20:48,123 INFO L85 PathProgramCache]: Analyzing trace with hash -876818260, now seen corresponding path program 1 times [2021-11-07 08:20:48,123 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:20:48,123 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309087229] [2021-11-07 08:20:48,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:20:48,124 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:20:48,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:20:48,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:20:48,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:20:48,376 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 08:20:48,376 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:20:48,377 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309087229] [2021-11-07 08:20:48,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309087229] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:20:48,377 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452220044] [2021-11-07 08:20:48,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:20:48,377 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:20:48,377 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f275f07d-780e-4f51-8688-e966b504fbd3/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:20:48,378 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f275f07d-780e-4f51-8688-e966b504fbd3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:20:48,407 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f275f07d-780e-4f51-8688-e966b504fbd3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-07 08:20:48,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:20:48,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 39 conjunts are in the unsatisfiable core [2021-11-07 08:20:48,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:20:48,677 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-07 08:20:48,677 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 [2021-11-07 08:20:48,683 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 [2021-11-07 08:20:49,180 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 08:20:49,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1452220044] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:20:49,180 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:20:49,181 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-11-07 08:20:49,181 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573332928] [2021-11-07 08:20:49,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-07 08:20:49,181 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:20:49,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-07 08:20:49,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=413, Unknown=0, NotChecked=0, Total=462 [2021-11-07 08:20:49,182 INFO L87 Difference]: Start difference. First operand 44 states and 49 transitions. Second operand has 22 states, 21 states have (on average 2.0) internal successors, (42), 19 states have internal predecessors, (42), 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) [2021-11-07 08:20:50,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:20:50,000 INFO L93 Difference]: Finished difference Result 44 states and 48 transitions. [2021-11-07 08:20:50,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-07 08:20:50,001 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.0) internal successors, (42), 19 states have internal predecessors, (42), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2021-11-07 08:20:50,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:20:50,002 INFO L225 Difference]: With dead ends: 44 [2021-11-07 08:20:50,002 INFO L226 Difference]: Without dead ends: 44 [2021-11-07 08:20:50,003 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=126, Invalid=804, Unknown=0, NotChecked=0, Total=930 [2021-11-07 08:20:50,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-11-07 08:20:50,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2021-11-07 08:20:50,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 37 states have (on average 1.1891891891891893) internal successors, (44), 39 states have internal predecessors, (44), 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) [2021-11-07 08:20:50,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 48 transitions. [2021-11-07 08:20:50,005 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 48 transitions. Word has length 27 [2021-11-07 08:20:50,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:20:50,005 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 48 transitions. [2021-11-07 08:20:50,005 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.0) internal successors, (42), 19 states have internal predecessors, (42), 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) [2021-11-07 08:20:50,005 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 48 transitions. [2021-11-07 08:20:50,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-07 08:20:50,006 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:20:50,006 INFO L513 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] [2021-11-07 08:20:50,052 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f275f07d-780e-4f51-8688-e966b504fbd3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-07 08:20:50,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f275f07d-780e-4f51-8688-e966b504fbd3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:20:50,207 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting cstrncpyErr5REQUIRES_VIOLATION === [cstrncpyErr0REQUIRES_VIOLATION, cstrncpyErr1REQUIRES_VIOLATION, cstrncpyErr2REQUIRES_VIOLATION, cstrncpyErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-07 08:20:50,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:20:50,207 INFO L85 PathProgramCache]: Analyzing trace with hash 171689394, now seen corresponding path program 1 times [2021-11-07 08:20:50,207 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:20:50,208 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264560687] [2021-11-07 08:20:50,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:20:50,208 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:20:50,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:20:50,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:20:50,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:20:50,636 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 08:20:50,636 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:20:50,636 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264560687] [2021-11-07 08:20:50,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264560687] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:20:50,636 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375434625] [2021-11-07 08:20:50,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:20:50,636 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:20:50,637 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f275f07d-780e-4f51-8688-e966b504fbd3/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:20:50,639 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f275f07d-780e-4f51-8688-e966b504fbd3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:20:50,662 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f275f07d-780e-4f51-8688-e966b504fbd3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-07 08:20:50,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:20:50,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 55 conjunts are in the unsatisfiable core [2021-11-07 08:20:50,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:20:50,952 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-07 08:20:50,952 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 [2021-11-07 08:20:50,959 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 [2021-11-07 08:20:51,458 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 08:20:51,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1375434625] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:20:51,459 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:20:51,459 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 21 [2021-11-07 08:20:51,460 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686240326] [2021-11-07 08:20:51,460 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-07 08:20:51,460 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:20:51,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-07 08:20:51,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=412, Unknown=0, NotChecked=0, Total=462 [2021-11-07 08:20:51,462 INFO L87 Difference]: Start difference. First operand 44 states and 48 transitions. Second operand has 22 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 20 states have internal predecessors, (41), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:20:52,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:20:52,688 INFO L93 Difference]: Finished difference Result 57 states and 61 transitions. [2021-11-07 08:20:52,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-07 08:20:52,688 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 20 states have internal predecessors, (41), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2021-11-07 08:20:52,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:20:52,689 INFO L225 Difference]: With dead ends: 57 [2021-11-07 08:20:52,689 INFO L226 Difference]: Without dead ends: 54 [2021-11-07 08:20:52,690 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=199, Invalid=1441, Unknown=0, NotChecked=0, Total=1640 [2021-11-07 08:20:52,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-11-07 08:20:52,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2021-11-07 08:20:52,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 43 states have (on average 1.2093023255813953) internal successors, (52), 45 states have internal predecessors, (52), 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) [2021-11-07 08:20:52,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 56 transitions. [2021-11-07 08:20:52,693 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 56 transitions. Word has length 31 [2021-11-07 08:20:52,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:20:52,693 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 56 transitions. [2021-11-07 08:20:52,694 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 20 states have internal predecessors, (41), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:20:52,694 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 56 transitions. [2021-11-07 08:20:52,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-07 08:20:52,694 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:20:52,695 INFO L513 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] [2021-11-07 08:20:52,727 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f275f07d-780e-4f51-8688-e966b504fbd3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-11-07 08:20:52,910 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f275f07d-780e-4f51-8688-e966b504fbd3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:20:52,910 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting cstrncpyErr1REQUIRES_VIOLATION === [cstrncpyErr0REQUIRES_VIOLATION, cstrncpyErr1REQUIRES_VIOLATION, cstrncpyErr2REQUIRES_VIOLATION, cstrncpyErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-07 08:20:52,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:20:52,911 INFO L85 PathProgramCache]: Analyzing trace with hash 1045442185, now seen corresponding path program 2 times [2021-11-07 08:20:52,911 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:20:52,911 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007078097] [2021-11-07 08:20:52,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:20:52,911 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:20:52,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:20:53,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:20:53,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:20:53,367 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:20:53,368 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:20:53,368 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007078097] [2021-11-07 08:20:53,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007078097] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:20:53,368 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74519776] [2021-11-07 08:20:53,369 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 08:20:53,369 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:20:53,369 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f275f07d-780e-4f51-8688-e966b504fbd3/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:20:53,383 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f275f07d-780e-4f51-8688-e966b504fbd3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:20:53,385 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f275f07d-780e-4f51-8688-e966b504fbd3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-07 08:20:53,643 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 08:20:53,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:20:53,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 54 conjunts are in the unsatisfiable core [2021-11-07 08:20:53,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:20:53,687 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 [2021-11-07 08:20:53,806 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 [2021-11-07 08:20:54,403 INFO L354 Elim1Store]: treesize reduction 34, result has 22.7 percent of original size [2021-11-07 08:20:54,404 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 [2021-11-07 08:20:54,806 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 08:20:54,807 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 [2021-11-07 08:20:55,066 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:20:55,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [74519776] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:20:55,066 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:20:55,066 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 29 [2021-11-07 08:20:55,067 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024186626] [2021-11-07 08:20:55,067 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-07 08:20:55,067 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:20:55,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-07 08:20:55,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=747, Unknown=0, NotChecked=0, Total=812 [2021-11-07 08:20:55,069 INFO L87 Difference]: Start difference. First operand 50 states and 56 transitions. Second operand has 29 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 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) [2021-11-07 08:20:57,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:20:57,345 INFO L93 Difference]: Finished difference Result 72 states and 76 transitions. [2021-11-07 08:20:57,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-07 08:20:57,346 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 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 32 [2021-11-07 08:20:57,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:20:57,347 INFO L225 Difference]: With dead ends: 72 [2021-11-07 08:20:57,347 INFO L226 Difference]: Without dead ends: 58 [2021-11-07 08:20:57,349 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 526 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=286, Invalid=2794, Unknown=0, NotChecked=0, Total=3080 [2021-11-07 08:20:57,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-11-07 08:20:57,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 54. [2021-11-07 08:20:57,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 47 states have (on average 1.1702127659574468) internal successors, (55), 49 states have internal predecessors, (55), 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) [2021-11-07 08:20:57,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 59 transitions. [2021-11-07 08:20:57,352 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 59 transitions. Word has length 32 [2021-11-07 08:20:57,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:20:57,353 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 59 transitions. [2021-11-07 08:20:57,353 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 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) [2021-11-07 08:20:57,353 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 59 transitions. [2021-11-07 08:20:57,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-07 08:20:57,354 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:20:57,354 INFO L513 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] [2021-11-07 08:20:57,397 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f275f07d-780e-4f51-8688-e966b504fbd3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-07 08:20:57,574 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f275f07d-780e-4f51-8688-e966b504fbd3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:20:57,575 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting cstrncpyErr3REQUIRES_VIOLATION === [cstrncpyErr0REQUIRES_VIOLATION, cstrncpyErr1REQUIRES_VIOLATION, cstrncpyErr2REQUIRES_VIOLATION, cstrncpyErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-07 08:20:57,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:20:57,575 INFO L85 PathProgramCache]: Analyzing trace with hash -1166776143, now seen corresponding path program 2 times [2021-11-07 08:20:57,575 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:20:57,575 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643527474] [2021-11-07 08:20:57,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:20:57,576 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:20:57,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:20:58,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:20:58,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:20:58,047 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 08:20:58,047 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:20:58,047 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643527474] [2021-11-07 08:20:58,047 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643527474] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:20:58,047 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094037348] [2021-11-07 08:20:58,047 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 08:20:58,047 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:20:58,048 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f275f07d-780e-4f51-8688-e966b504fbd3/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:20:58,048 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f275f07d-780e-4f51-8688-e966b504fbd3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:20:58,049 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f275f07d-780e-4f51-8688-e966b504fbd3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-07 08:20:58,334 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 08:20:58,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:20:58,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 47 conjunts are in the unsatisfiable core [2021-11-07 08:20:58,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:20:58,398 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-07 08:20:58,398 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 [2021-11-07 08:20:58,401 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 [2021-11-07 08:20:59,161 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 08:20:59,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1094037348] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:20:59,161 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:20:59,162 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 27 [2021-11-07 08:20:59,162 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971608753] [2021-11-07 08:20:59,162 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-07 08:20:59,162 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:20:59,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-07 08:20:59,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=691, Unknown=0, NotChecked=0, Total=756 [2021-11-07 08:20:59,164 INFO L87 Difference]: Start difference. First operand 54 states and 59 transitions. Second operand has 28 states, 27 states have (on average 2.0) internal successors, (54), 25 states have internal predecessors, (54), 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) [2021-11-07 08:21:00,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:21:00,670 INFO L93 Difference]: Finished difference Result 61 states and 66 transitions. [2021-11-07 08:21:00,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-07 08:21:00,673 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.0) internal successors, (54), 25 states have internal predecessors, (54), 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 [2021-11-07 08:21:00,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:21:00,674 INFO L225 Difference]: With dead ends: 61 [2021-11-07 08:21:00,674 INFO L226 Difference]: Without dead ends: 61 [2021-11-07 08:21:00,675 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=225, Invalid=1755, Unknown=0, NotChecked=0, Total=1980 [2021-11-07 08:21:00,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-11-07 08:21:00,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 59. [2021-11-07 08:21:00,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 52 states have (on average 1.1538461538461537) internal successors, (60), 54 states have internal predecessors, (60), 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) [2021-11-07 08:21:00,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 64 transitions. [2021-11-07 08:21:00,678 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 64 transitions. Word has length 37 [2021-11-07 08:21:00,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:21:00,678 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 64 transitions. [2021-11-07 08:21:00,678 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.0) internal successors, (54), 25 states have internal predecessors, (54), 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) [2021-11-07 08:21:00,679 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 64 transitions. [2021-11-07 08:21:00,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-07 08:21:00,679 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:21:00,679 INFO L513 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] [2021-11-07 08:21:00,708 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f275f07d-780e-4f51-8688-e966b504fbd3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-11-07 08:21:00,894 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f275f07d-780e-4f51-8688-e966b504fbd3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:21:00,894 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting cstrncpyErr1REQUIRES_VIOLATION === [cstrncpyErr0REQUIRES_VIOLATION, cstrncpyErr1REQUIRES_VIOLATION, cstrncpyErr2REQUIRES_VIOLATION, cstrncpyErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-07 08:21:00,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:21:00,895 INFO L85 PathProgramCache]: Analyzing trace with hash 1394594212, now seen corresponding path program 3 times [2021-11-07 08:21:00,895 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:21:00,895 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943490622] [2021-11-07 08:21:00,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:21:00,896 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:21:00,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:21:01,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:21:01,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:21:01,359 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:21:01,359 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:21:01,360 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943490622] [2021-11-07 08:21:01,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943490622] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:21:01,360 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963490229] [2021-11-07 08:21:01,360 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 08:21:01,360 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:21:01,360 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f275f07d-780e-4f51-8688-e966b504fbd3/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:21:01,363 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f275f07d-780e-4f51-8688-e966b504fbd3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:21:01,390 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f275f07d-780e-4f51-8688-e966b504fbd3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-07 08:21:01,786 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-07 08:21:01,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:21:01,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 65 conjunts are in the unsatisfiable core [2021-11-07 08:21:01,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:21:01,836 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 [2021-11-07 08:21:02,070 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 [2021-11-07 08:21:02,474 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 28 treesize of output 27 [2021-11-07 08:21:02,621 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-07 08:21:02,622 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 [2021-11-07 08:21:02,654 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 [2021-11-07 08:21:02,672 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:21:02,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963490229] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:21:02,672 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:21:02,673 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17] total 31 [2021-11-07 08:21:02,673 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017883245] [2021-11-07 08:21:02,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-07 08:21:02,673 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:21:02,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-07 08:21:02,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=850, Unknown=0, NotChecked=0, Total=930 [2021-11-07 08:21:02,678 INFO L87 Difference]: Start difference. First operand 59 states and 64 transitions. Second operand has 31 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 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) [2021-11-07 08:21:03,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:21:03,750 INFO L93 Difference]: Finished difference Result 86 states and 92 transitions. [2021-11-07 08:21:03,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-07 08:21:03,751 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 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 [2021-11-07 08:21:03,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:21:03,751 INFO L225 Difference]: With dead ends: 86 [2021-11-07 08:21:03,751 INFO L226 Difference]: Without dead ends: 86 [2021-11-07 08:21:03,752 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=176, Invalid=1716, Unknown=0, NotChecked=0, Total=1892 [2021-11-07 08:21:03,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-11-07 08:21:03,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 83. [2021-11-07 08:21:03,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 75 states have (on average 1.12) internal successors, (84), 77 states have internal predecessors, (84), 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) [2021-11-07 08:21:03,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 89 transitions. [2021-11-07 08:21:03,756 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 89 transitions. Word has length 42 [2021-11-07 08:21:03,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:21:03,757 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 89 transitions. [2021-11-07 08:21:03,757 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 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) [2021-11-07 08:21:03,757 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 89 transitions. [2021-11-07 08:21:03,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-07 08:21:03,758 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:21:03,758 INFO L513 BasicCegarLoop]: trace histogram [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, 1, 1] [2021-11-07 08:21:03,792 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f275f07d-780e-4f51-8688-e966b504fbd3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-07 08:21:03,974 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f275f07d-780e-4f51-8688-e966b504fbd3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-11-07 08:21:03,974 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting cstrncpyErr5REQUIRES_VIOLATION === [cstrncpyErr0REQUIRES_VIOLATION, cstrncpyErr1REQUIRES_VIOLATION, cstrncpyErr2REQUIRES_VIOLATION, cstrncpyErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-07 08:21:03,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:21:03,975 INFO L85 PathProgramCache]: Analyzing trace with hash 629729263, now seen corresponding path program 1 times [2021-11-07 08:21:03,975 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:21:03,975 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808677786] [2021-11-07 08:21:03,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:21:03,975 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:21:03,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:21:04,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:21:04,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:21:04,479 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 08:21:04,480 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:21:04,480 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808677786] [2021-11-07 08:21:04,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808677786] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:21:04,480 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359209016] [2021-11-07 08:21:04,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:21:04,481 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:21:04,481 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f275f07d-780e-4f51-8688-e966b504fbd3/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:21:04,486 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f275f07d-780e-4f51-8688-e966b504fbd3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:21:04,494 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f275f07d-780e-4f51-8688-e966b504fbd3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-07 08:21:04,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:21:04,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 75 conjunts are in the unsatisfiable core [2021-11-07 08:21:04,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:21:04,899 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-07 08:21:04,901 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 [2021-11-07 08:21:04,904 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 [2021-11-07 08:21:05,792 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 08:21:05,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [359209016] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:21:05,792 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:21:05,792 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-11-07 08:21:05,792 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278765253] [2021-11-07 08:21:05,793 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-07 08:21:05,793 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:21:05,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-07 08:21:05,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=784, Unknown=0, NotChecked=0, Total=870 [2021-11-07 08:21:05,794 INFO L87 Difference]: Start difference. First operand 83 states and 89 transitions. Second operand has 30 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:21:07,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:21:07,728 INFO L93 Difference]: Finished difference Result 92 states and 98 transitions. [2021-11-07 08:21:07,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-07 08:21:07,729 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2021-11-07 08:21:07,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:21:07,729 INFO L225 Difference]: With dead ends: 92 [2021-11-07 08:21:07,729 INFO L226 Difference]: Without dead ends: 59 [2021-11-07 08:21:07,731 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 707 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=368, Invalid=2824, Unknown=0, NotChecked=0, Total=3192 [2021-11-07 08:21:07,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-11-07 08:21:07,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2021-11-07 08:21:07,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 54 states have internal predecessors, (58), 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) [2021-11-07 08:21:07,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 62 transitions. [2021-11-07 08:21:07,733 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 62 transitions. Word has length 45 [2021-11-07 08:21:07,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:21:07,733 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 62 transitions. [2021-11-07 08:21:07,734 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:21:07,734 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 62 transitions. [2021-11-07 08:21:07,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-07 08:21:07,734 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:21:07,735 INFO L513 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] [2021-11-07 08:21:07,782 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f275f07d-780e-4f51-8688-e966b504fbd3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-07 08:21:07,950 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f275f07d-780e-4f51-8688-e966b504fbd3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-11-07 08:21:07,950 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting cstrncpyErr1REQUIRES_VIOLATION === [cstrncpyErr0REQUIRES_VIOLATION, cstrncpyErr1REQUIRES_VIOLATION, cstrncpyErr2REQUIRES_VIOLATION, cstrncpyErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-07 08:21:07,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:21:07,951 INFO L85 PathProgramCache]: Analyzing trace with hash -1764202815, now seen corresponding path program 4 times [2021-11-07 08:21:07,951 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:21:07,951 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043825704] [2021-11-07 08:21:07,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:21:07,951 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:21:07,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:21:08,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:21:08,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:21:08,228 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:21:08,228 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:21:08,228 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043825704] [2021-11-07 08:21:08,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043825704] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:21:08,228 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130331941] [2021-11-07 08:21:08,229 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 08:21:08,229 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:21:08,229 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f275f07d-780e-4f51-8688-e966b504fbd3/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:21:08,242 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f275f07d-780e-4f51-8688-e966b504fbd3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:21:08,257 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f275f07d-780e-4f51-8688-e966b504fbd3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-07 08:21:08,722 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 08:21:08,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:21:08,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 45 conjunts are in the unsatisfiable core [2021-11-07 08:21:08,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:21:09,164 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:21:09,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2130331941] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:21:09,164 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:21:09,165 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 24 [2021-11-07 08:21:09,165 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380917629] [2021-11-07 08:21:09,165 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-07 08:21:09,165 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:21:09,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-07 08:21:09,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=535, Unknown=0, NotChecked=0, Total=600 [2021-11-07 08:21:09,166 INFO L87 Difference]: Start difference. First operand 59 states and 62 transitions. Second operand has 25 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 22 states have internal predecessors, (62), 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) [2021-11-07 08:21:09,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:21:09,832 INFO L93 Difference]: Finished difference Result 60 states and 63 transitions. [2021-11-07 08:21:09,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-07 08:21:09,832 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 22 states have internal predecessors, (62), 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 46 [2021-11-07 08:21:09,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:21:09,834 INFO L225 Difference]: With dead ends: 60 [2021-11-07 08:21:09,834 INFO L226 Difference]: Without dead ends: 60 [2021-11-07 08:21:09,835 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=153, Invalid=969, Unknown=0, NotChecked=0, Total=1122 [2021-11-07 08:21:09,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-11-07 08:21:09,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2021-11-07 08:21:09,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 52 states have (on average 1.0961538461538463) internal successors, (57), 54 states have internal predecessors, (57), 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) [2021-11-07 08:21:09,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 61 transitions. [2021-11-07 08:21:09,837 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 61 transitions. Word has length 46 [2021-11-07 08:21:09,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:21:09,838 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 61 transitions. [2021-11-07 08:21:09,838 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 22 states have internal predecessors, (62), 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) [2021-11-07 08:21:09,838 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 61 transitions. [2021-11-07 08:21:09,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-07 08:21:09,839 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:21:09,839 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:21:09,878 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f275f07d-780e-4f51-8688-e966b504fbd3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-07 08:21:10,058 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f275f07d-780e-4f51-8688-e966b504fbd3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-11-07 08:21:10,058 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting cstrncpyErr5REQUIRES_VIOLATION === [cstrncpyErr0REQUIRES_VIOLATION, cstrncpyErr1REQUIRES_VIOLATION, cstrncpyErr2REQUIRES_VIOLATION, cstrncpyErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-07 08:21:10,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:21:10,059 INFO L85 PathProgramCache]: Analyzing trace with hash 1165758780, now seen corresponding path program 2 times [2021-11-07 08:21:10,059 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:21:10,059 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697831622] [2021-11-07 08:21:10,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:21:10,059 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:21:10,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:21:10,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:21:10,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:21:10,536 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-07 08:21:10,537 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:21:10,537 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697831622] [2021-11-07 08:21:10,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697831622] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:21:10,537 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596455133] [2021-11-07 08:21:10,537 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 08:21:10,538 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:21:10,538 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f275f07d-780e-4f51-8688-e966b504fbd3/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:21:10,543 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f275f07d-780e-4f51-8688-e966b504fbd3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:21:10,550 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f275f07d-780e-4f51-8688-e966b504fbd3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-07 08:21:10,988 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 08:21:10,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:21:10,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 75 conjunts are in the unsatisfiable core [2021-11-07 08:21:10,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:21:11,037 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-07 08:21:11,037 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 [2021-11-07 08:21:11,040 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 [2021-11-07 08:21:11,894 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-07 08:21:11,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1596455133] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:21:11,894 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:21:11,894 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15] total 28 [2021-11-07 08:21:11,894 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647301897] [2021-11-07 08:21:11,895 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-07 08:21:11,895 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:21:11,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-07 08:21:11,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=725, Unknown=0, NotChecked=0, Total=812 [2021-11-07 08:21:11,896 INFO L87 Difference]: Start difference. First operand 59 states and 61 transitions. Second operand has 29 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 27 states have internal predecessors, (65), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:21:13,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:21:13,162 INFO L93 Difference]: Finished difference Result 63 states and 65 transitions. [2021-11-07 08:21:13,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-07 08:21:13,163 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 27 states have internal predecessors, (65), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2021-11-07 08:21:13,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:21:13,163 INFO L225 Difference]: With dead ends: 63 [2021-11-07 08:21:13,164 INFO L226 Difference]: Without dead ends: 57 [2021-11-07 08:21:13,165 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 589 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=315, Invalid=2337, Unknown=0, NotChecked=0, Total=2652 [2021-11-07 08:21:13,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-11-07 08:21:13,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 55. [2021-11-07 08:21:13,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 49 states have (on average 1.0816326530612246) internal successors, (53), 50 states have internal predecessors, (53), 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) [2021-11-07 08:21:13,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 57 transitions. [2021-11-07 08:21:13,185 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 57 transitions. Word has length 51 [2021-11-07 08:21:13,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:21:13,186 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 57 transitions. [2021-11-07 08:21:13,186 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 27 states have internal predecessors, (65), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:21:13,202 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 57 transitions. [2021-11-07 08:21:13,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-07 08:21:13,203 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:21:13,203 INFO L513 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:21:13,241 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f275f07d-780e-4f51-8688-e966b504fbd3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-07 08:21:13,403 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f275f07d-780e-4f51-8688-e966b504fbd3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-11-07 08:21:13,403 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting cstrncpyErr1REQUIRES_VIOLATION === [cstrncpyErr0REQUIRES_VIOLATION, cstrncpyErr1REQUIRES_VIOLATION, cstrncpyErr2REQUIRES_VIOLATION, cstrncpyErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-07 08:21:13,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:21:13,404 INFO L85 PathProgramCache]: Analyzing trace with hash 1796822079, now seen corresponding path program 5 times [2021-11-07 08:21:13,404 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:21:13,404 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782551997] [2021-11-07 08:21:13,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:21:13,404 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:21:13,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:21:14,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:21:14,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:21:14,052 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 14 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:21:14,052 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:21:14,052 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782551997] [2021-11-07 08:21:14,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782551997] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:21:14,053 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36645405] [2021-11-07 08:21:14,053 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 08:21:14,053 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:21:14,053 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f275f07d-780e-4f51-8688-e966b504fbd3/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:21:14,067 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f275f07d-780e-4f51-8688-e966b504fbd3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:21:14,068 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f275f07d-780e-4f51-8688-e966b504fbd3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-07 08:21:14,944 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-11-07 08:21:14,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:21:14,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 89 conjunts are in the unsatisfiable core [2021-11-07 08:21:14,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:21:14,987 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 [2021-11-07 08:21:14,991 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 [2021-11-07 08:21:15,332 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 16 treesize of output 12 [2021-11-07 08:21:15,628 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 23 treesize of output 22 [2021-11-07 08:21:15,828 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 23 treesize of output 22 [2021-11-07 08:21:16,014 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-11-07 08:21:16,016 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 27 treesize of output 26 [2021-11-07 08:21:16,203 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 08:21:16,203 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 21 treesize of output 21 [2021-11-07 08:21:16,391 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 6 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:21:16,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [36645405] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:21:16,391 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:21:16,391 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 19] total 42 [2021-11-07 08:21:16,391 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744790068] [2021-11-07 08:21:16,392 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-11-07 08:21:16,392 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:21:16,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-11-07 08:21:16,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1627, Unknown=0, NotChecked=0, Total=1722 [2021-11-07 08:21:16,393 INFO L87 Difference]: Start difference. First operand 55 states and 57 transitions. Second operand has 42 states, 40 states have (on average 2.3) internal successors, (92), 39 states have internal predecessors, (92), 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) [2021-11-07 08:21:19,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:21:19,039 INFO L93 Difference]: Finished difference Result 96 states and 98 transitions. [2021-11-07 08:21:19,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-11-07 08:21:19,039 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 40 states have (on average 2.3) internal successors, (92), 39 states have internal predecessors, (92), 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 52 [2021-11-07 08:21:19,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:21:19,040 INFO L225 Difference]: With dead ends: 96 [2021-11-07 08:21:19,040 INFO L226 Difference]: Without dead ends: 70 [2021-11-07 08:21:19,042 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 935 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=371, Invalid=5635, Unknown=0, NotChecked=0, Total=6006 [2021-11-07 08:21:19,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-11-07 08:21:19,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 64. [2021-11-07 08:21:19,045 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) [2021-11-07 08:21:19,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 66 transitions. [2021-11-07 08:21:19,045 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 66 transitions. Word has length 52 [2021-11-07 08:21:19,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:21:19,046 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 66 transitions. [2021-11-07 08:21:19,046 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 40 states have (on average 2.3) internal successors, (92), 39 states have internal predecessors, (92), 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) [2021-11-07 08:21:19,046 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 66 transitions. [2021-11-07 08:21:19,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-07 08:21:19,047 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:21:19,047 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:21:19,073 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f275f07d-780e-4f51-8688-e966b504fbd3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-07 08:21:19,247 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f275f07d-780e-4f51-8688-e966b504fbd3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-11-07 08:21:19,248 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting cstrncpyErr3REQUIRES_VIOLATION === [cstrncpyErr0REQUIRES_VIOLATION, cstrncpyErr1REQUIRES_VIOLATION, cstrncpyErr2REQUIRES_VIOLATION, cstrncpyErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-07 08:21:19,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:21:19,248 INFO L85 PathProgramCache]: Analyzing trace with hash -172410309, now seen corresponding path program 3 times [2021-11-07 08:21:19,248 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:21:19,248 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627623602] [2021-11-07 08:21:19,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:21:19,248 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:21:19,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:21:19,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:21:19,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:21:19,761 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 12 proven. 36 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-07 08:21:19,761 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:21:19,762 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627623602] [2021-11-07 08:21:19,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627623602] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:21:19,762 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681152786] [2021-11-07 08:21:19,762 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 08:21:19,762 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:21:19,762 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f275f07d-780e-4f51-8688-e966b504fbd3/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:21:19,771 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f275f07d-780e-4f51-8688-e966b504fbd3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:21:19,772 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f275f07d-780e-4f51-8688-e966b504fbd3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-07 08:21:20,351 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-07 08:21:20,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:21:20,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 73 conjunts are in the unsatisfiable core [2021-11-07 08:21:20,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:21:20,391 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-07 08:21:20,391 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 [2021-11-07 08:21:20,393 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 [2021-11-07 08:21:21,269 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-07 08:21:21,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [681152786] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:21:21,269 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:21:21,270 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 30 [2021-11-07 08:21:21,270 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169162111] [2021-11-07 08:21:21,270 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-07 08:21:21,270 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:21:21,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-07 08:21:21,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=838, Unknown=0, NotChecked=0, Total=930 [2021-11-07 08:21:21,272 INFO L87 Difference]: Start difference. First operand 64 states and 66 transitions. Second operand has 31 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:21:22,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:21:22,566 INFO L93 Difference]: Finished difference Result 65 states and 67 transitions. [2021-11-07 08:21:22,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-07 08:21:22,567 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 57 [2021-11-07 08:21:22,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:21:22,567 INFO L225 Difference]: With dead ends: 65 [2021-11-07 08:21:22,568 INFO L226 Difference]: Without dead ends: 65 [2021-11-07 08:21:22,569 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 606 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=309, Invalid=2447, Unknown=0, NotChecked=0, Total=2756 [2021-11-07 08:21:22,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-11-07 08:21:22,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 63. [2021-11-07 08:21:22,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 58 states have (on average 1.0517241379310345) internal successors, (61), 58 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) [2021-11-07 08:21:22,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 65 transitions. [2021-11-07 08:21:22,572 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 65 transitions. Word has length 57 [2021-11-07 08:21:22,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:21:22,573 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 65 transitions. [2021-11-07 08:21:22,573 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:21:22,573 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 65 transitions. [2021-11-07 08:21:22,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-07 08:21:22,574 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:21:22,574 INFO L513 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:21:22,621 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f275f07d-780e-4f51-8688-e966b504fbd3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-07 08:21:22,792 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f275f07d-780e-4f51-8688-e966b504fbd3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-11-07 08:21:22,793 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting cstrncpyErr1REQUIRES_VIOLATION === [cstrncpyErr0REQUIRES_VIOLATION, cstrncpyErr1REQUIRES_VIOLATION, cstrncpyErr2REQUIRES_VIOLATION, cstrncpyErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-07 08:21:22,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:21:22,793 INFO L85 PathProgramCache]: Analyzing trace with hash 313681498, now seen corresponding path program 6 times [2021-11-07 08:21:22,793 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:21:22,793 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244168230] [2021-11-07 08:21:22,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:21:22,794 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:21:22,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:21:23,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:21:23,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:21:23,620 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 18 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:21:23,621 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:21:23,621 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244168230] [2021-11-07 08:21:23,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244168230] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:21:23,621 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314256353] [2021-11-07 08:21:23,621 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 08:21:23,621 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:21:23,621 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f275f07d-780e-4f51-8688-e966b504fbd3/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:21:23,622 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f275f07d-780e-4f51-8688-e966b504fbd3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:21:23,629 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f275f07d-780e-4f51-8688-e966b504fbd3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-07 08:21:24,265 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-11-07 08:21:24,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:21:24,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 99 conjunts are in the unsatisfiable core [2021-11-07 08:21:24,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:21:24,296 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 [2021-11-07 08:21:24,632 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 [2021-11-07 08:21:25,035 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 28 treesize of output 27 [2021-11-07 08:21:25,194 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 21 treesize of output 20 [2021-11-07 08:21:25,313 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 21 treesize of output 20 [2021-11-07 08:21:25,429 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 [2021-11-07 08:21:25,517 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 [2021-11-07 08:21:25,534 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 18 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:21:25,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1314256353] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:21:25,535 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:21:25,535 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 23] total 44 [2021-11-07 08:21:25,535 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410138864] [2021-11-07 08:21:25,536 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-11-07 08:21:25,536 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:21:25,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-11-07 08:21:25,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1775, Unknown=0, NotChecked=0, Total=1892 [2021-11-07 08:21:25,538 INFO L87 Difference]: Start difference. First operand 63 states and 65 transitions. Second operand has 44 states, 42 states have (on average 2.2857142857142856) internal successors, (96), 41 states have internal predecessors, (96), 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) [2021-11-07 08:21:27,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:21:27,174 INFO L93 Difference]: Finished difference Result 102 states and 104 transitions. [2021-11-07 08:21:27,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-07 08:21:27,175 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 42 states have (on average 2.2857142857142856) internal successors, (96), 41 states have internal predecessors, (96), 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 62 [2021-11-07 08:21:27,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:21:27,176 INFO L225 Difference]: With dead ends: 102 [2021-11-07 08:21:27,176 INFO L226 Difference]: Without dead ends: 70 [2021-11-07 08:21:27,178 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 579 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=239, Invalid=3421, Unknown=0, NotChecked=0, Total=3660 [2021-11-07 08:21:27,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-11-07 08:21:27,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 67. [2021-11-07 08:21:27,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 62 states have (on average 1.0483870967741935) internal successors, (65), 62 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) [2021-11-07 08:21:27,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 69 transitions. [2021-11-07 08:21:27,181 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 69 transitions. Word has length 62 [2021-11-07 08:21:27,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:21:27,181 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 69 transitions. [2021-11-07 08:21:27,182 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 42 states have (on average 2.2857142857142856) internal successors, (96), 41 states have internal predecessors, (96), 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) [2021-11-07 08:21:27,182 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 69 transitions. [2021-11-07 08:21:27,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-07 08:21:27,183 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:21:27,183 INFO L513 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:21:27,211 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f275f07d-780e-4f51-8688-e966b504fbd3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-07 08:21:27,390 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f275f07d-780e-4f51-8688-e966b504fbd3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-11-07 08:21:27,390 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting cstrncpyErr1REQUIRES_VIOLATION === [cstrncpyErr0REQUIRES_VIOLATION, cstrncpyErr1REQUIRES_VIOLATION, cstrncpyErr2REQUIRES_VIOLATION, cstrncpyErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-07 08:21:27,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:21:27,391 INFO L85 PathProgramCache]: Analyzing trace with hash -1096660233, now seen corresponding path program 7 times [2021-11-07 08:21:27,391 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:21:27,391 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763999631] [2021-11-07 08:21:27,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:21:27,391 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:21:27,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:21:27,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:21:27,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:21:27,844 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 15 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:21:27,844 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:21:27,844 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763999631] [2021-11-07 08:21:27,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763999631] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:21:27,844 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807593166] [2021-11-07 08:21:27,844 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 08:21:27,845 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:21:27,845 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f275f07d-780e-4f51-8688-e966b504fbd3/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:21:27,846 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f275f07d-780e-4f51-8688-e966b504fbd3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:21:27,870 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f275f07d-780e-4f51-8688-e966b504fbd3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-07 08:21:28,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:21:28,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 63 conjunts are in the unsatisfiable core [2021-11-07 08:21:28,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:21:29,141 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 28 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:21:29,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1807593166] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:21:29,141 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:21:29,142 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 30 [2021-11-07 08:21:29,142 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954601849] [2021-11-07 08:21:29,142 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-07 08:21:29,142 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:21:29,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-07 08:21:29,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=832, Unknown=0, NotChecked=0, Total=930 [2021-11-07 08:21:29,144 INFO L87 Difference]: Start difference. First operand 67 states and 69 transitions. Second operand has 31 states, 28 states have (on average 3.2142857142857144) internal successors, (90), 28 states have internal predecessors, (90), 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) [2021-11-07 08:21:30,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:21:30,066 INFO L93 Difference]: Finished difference Result 75 states and 77 transitions. [2021-11-07 08:21:30,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-07 08:21:30,067 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 28 states have (on average 3.2142857142857144) internal successors, (90), 28 states have internal predecessors, (90), 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 66 [2021-11-07 08:21:30,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:21:30,068 INFO L225 Difference]: With dead ends: 75 [2021-11-07 08:21:30,068 INFO L226 Difference]: Without dead ends: 75 [2021-11-07 08:21:30,069 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=210, Invalid=1512, Unknown=0, NotChecked=0, Total=1722 [2021-11-07 08:21:30,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-11-07 08:21:30,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 73. [2021-11-07 08:21:30,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 68 states have (on average 1.0441176470588236) internal successors, (71), 68 states have internal predecessors, (71), 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) [2021-11-07 08:21:30,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 75 transitions. [2021-11-07 08:21:30,072 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 75 transitions. Word has length 66 [2021-11-07 08:21:30,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:21:30,072 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 75 transitions. [2021-11-07 08:21:30,073 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 28 states have (on average 3.2142857142857144) internal successors, (90), 28 states have internal predecessors, (90), 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) [2021-11-07 08:21:30,073 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 75 transitions. [2021-11-07 08:21:30,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-07 08:21:30,074 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:21:30,074 INFO L513 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:21:30,108 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f275f07d-780e-4f51-8688-e966b504fbd3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-07 08:21:30,294 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f275f07d-780e-4f51-8688-e966b504fbd3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:21:30,294 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting cstrncpyErr1REQUIRES_VIOLATION === [cstrncpyErr0REQUIRES_VIOLATION, cstrncpyErr1REQUIRES_VIOLATION, cstrncpyErr2REQUIRES_VIOLATION, cstrncpyErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-07 08:21:30,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:21:30,295 INFO L85 PathProgramCache]: Analyzing trace with hash 226015221, now seen corresponding path program 8 times [2021-11-07 08:21:30,295 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:21:30,295 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648094244] [2021-11-07 08:21:30,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:21:30,295 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:21:30,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:21:31,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:21:31,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:21:31,312 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 22 proven. 125 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:21:31,312 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:21:31,312 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648094244] [2021-11-07 08:21:31,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648094244] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:21:31,313 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290134758] [2021-11-07 08:21:31,313 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 08:21:31,313 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:21:31,313 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f275f07d-780e-4f51-8688-e966b504fbd3/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:21:31,314 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f275f07d-780e-4f51-8688-e966b504fbd3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:21:31,315 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f275f07d-780e-4f51-8688-e966b504fbd3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-07 08:21:31,995 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 08:21:31,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:21:31,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 110 conjunts are in the unsatisfiable core [2021-11-07 08:21:32,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:21:32,029 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 [2021-11-07 08:21:32,384 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 [2021-11-07 08:21:33,056 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 37 treesize of output 36 [2021-11-07 08:21:33,551 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 37 treesize of output 36 [2021-11-07 08:21:34,048 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 37 treesize of output 36 [2021-11-07 08:21:34,523 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 37 treesize of output 36 [2021-11-07 08:21:34,958 INFO L354 Elim1Store]: treesize reduction 34, result has 22.7 percent of original size [2021-11-07 08:21:34,958 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 [2021-11-07 08:21:35,352 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 08:21:35,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2021-11-07 08:21:35,695 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 28 proven. 119 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:21:35,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [290134758] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:21:35,696 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:21:35,696 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 26] total 57 [2021-11-07 08:21:35,696 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585668634] [2021-11-07 08:21:35,697 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2021-11-07 08:21:35,697 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:21:35,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-11-07 08:21:35,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=3036, Unknown=0, NotChecked=0, Total=3192 [2021-11-07 08:21:35,700 INFO L87 Difference]: Start difference. First operand 73 states and 75 transitions. Second operand has 57 states, 55 states have (on average 2.4) internal successors, (132), 54 states have internal predecessors, (132), 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) [2021-11-07 08:21:43,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:21:43,713 INFO L93 Difference]: Finished difference Result 126 states and 128 transitions. [2021-11-07 08:21:43,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-11-07 08:21:43,713 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 55 states have (on average 2.4) internal successors, (132), 54 states have internal predecessors, (132), 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 72 [2021-11-07 08:21:43,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:21:43,714 INFO L225 Difference]: With dead ends: 126 [2021-11-07 08:21:43,714 INFO L226 Difference]: Without dead ends: 88 [2021-11-07 08:21:43,717 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1668 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=496, Invalid=9206, Unknown=0, NotChecked=0, Total=9702 [2021-11-07 08:21:43,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-11-07 08:21:43,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 83. [2021-11-07 08:21:43,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 78 states have (on average 1.0384615384615385) internal successors, (81), 78 states have internal predecessors, (81), 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) [2021-11-07 08:21:43,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 85 transitions. [2021-11-07 08:21:43,720 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 85 transitions. Word has length 72 [2021-11-07 08:21:43,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:21:43,721 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 85 transitions. [2021-11-07 08:21:43,721 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 55 states have (on average 2.4) internal successors, (132), 54 states have internal predecessors, (132), 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) [2021-11-07 08:21:43,721 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 85 transitions. [2021-11-07 08:21:43,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-07 08:21:43,722 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:21:43,722 INFO L513 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:21:43,771 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f275f07d-780e-4f51-8688-e966b504fbd3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-07 08:21:43,935 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f275f07d-780e-4f51-8688-e966b504fbd3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-11-07 08:21:43,935 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting cstrncpyErr1REQUIRES_VIOLATION === [cstrncpyErr0REQUIRES_VIOLATION, cstrncpyErr1REQUIRES_VIOLATION, cstrncpyErr2REQUIRES_VIOLATION, cstrncpyErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-07 08:21:43,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:21:43,935 INFO L85 PathProgramCache]: Analyzing trace with hash -1324222192, now seen corresponding path program 9 times [2021-11-07 08:21:43,935 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:21:43,936 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528107497] [2021-11-07 08:21:43,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:21:43,936 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:21:43,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:21:45,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:21:45,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:21:45,168 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 26 proven. 180 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:21:45,168 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:21:45,169 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528107497] [2021-11-07 08:21:45,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528107497] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:21:45,169 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561385387] [2021-11-07 08:21:45,169 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 08:21:45,169 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:21:45,169 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f275f07d-780e-4f51-8688-e966b504fbd3/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:21:45,183 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f275f07d-780e-4f51-8688-e966b504fbd3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:21:45,188 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f275f07d-780e-4f51-8688-e966b504fbd3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-07 08:21:46,118 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-11-07 08:21:46,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:21:46,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 165 conjunts are in the unsatisfiable core [2021-11-07 08:21:46,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:21:46,158 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 [2021-11-07 08:21:47,026 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 [2021-11-07 08:21:47,512 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 27 treesize of output 26 [2021-11-07 08:21:47,816 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 27 treesize of output 26 [2021-11-07 08:21:48,161 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 27 treesize of output 26 [2021-11-07 08:21:48,487 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 27 treesize of output 26 [2021-11-07 08:21:48,815 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 27 treesize of output 26 [2021-11-07 08:21:49,198 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-11-07 08:21:49,199 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 31 treesize of output 30 [2021-11-07 08:21:49,449 INFO L354 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2021-11-07 08:21:49,450 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 23 treesize of output 16 [2021-11-07 08:21:49,465 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 26 proven. 180 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:21:49,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1561385387] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:21:49,465 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:21:49,465 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 29] total 62 [2021-11-07 08:21:49,466 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201815227] [2021-11-07 08:21:49,466 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2021-11-07 08:21:49,466 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:21:49,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-11-07 08:21:49,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=3606, Unknown=0, NotChecked=0, Total=3782 [2021-11-07 08:21:49,468 INFO L87 Difference]: Start difference. First operand 83 states and 85 transitions. Second operand has 62 states, 60 states have (on average 2.433333333333333) internal successors, (146), 59 states have internal predecessors, (146), 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) [2021-11-07 08:21:52,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:21:52,481 INFO L93 Difference]: Finished difference Result 134 states and 136 transitions. [2021-11-07 08:21:52,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-07 08:21:52,481 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 60 states have (on average 2.433333333333333) internal successors, (146), 59 states have internal predecessors, (146), 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 82 [2021-11-07 08:21:52,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:21:52,482 INFO L225 Difference]: With dead ends: 134 [2021-11-07 08:21:52,482 INFO L226 Difference]: Without dead ends: 90 [2021-11-07 08:21:52,483 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1442 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=395, Invalid=6085, Unknown=0, NotChecked=0, Total=6480 [2021-11-07 08:21:52,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-11-07 08:21:52,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 87. [2021-11-07 08:21:52,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 82 states have (on average 1.0365853658536586) internal successors, (85), 82 states have internal predecessors, (85), 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) [2021-11-07 08:21:52,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 89 transitions. [2021-11-07 08:21:52,487 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 89 transitions. Word has length 82 [2021-11-07 08:21:52,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:21:52,487 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 89 transitions. [2021-11-07 08:21:52,488 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 60 states have (on average 2.433333333333333) internal successors, (146), 59 states have internal predecessors, (146), 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) [2021-11-07 08:21:52,488 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 89 transitions. [2021-11-07 08:21:52,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-07 08:21:52,489 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:21:52,489 INFO L513 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:21:52,516 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f275f07d-780e-4f51-8688-e966b504fbd3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-07 08:21:52,689 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f275f07d-780e-4f51-8688-e966b504fbd3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-11-07 08:21:52,690 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting cstrncpyErr1REQUIRES_VIOLATION === [cstrncpyErr0REQUIRES_VIOLATION, cstrncpyErr1REQUIRES_VIOLATION, cstrncpyErr2REQUIRES_VIOLATION, cstrncpyErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-07 08:21:52,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:21:52,690 INFO L85 PathProgramCache]: Analyzing trace with hash 66481453, now seen corresponding path program 10 times [2021-11-07 08:21:52,691 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:21:52,691 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18079139] [2021-11-07 08:21:52,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:21:52,691 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:21:52,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:21:53,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:21:53,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:21:53,286 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 45 proven. 186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:21:53,286 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:21:53,286 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18079139] [2021-11-07 08:21:53,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18079139] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:21:53,287 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567615043] [2021-11-07 08:21:53,287 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 08:21:53,287 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:21:53,287 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f275f07d-780e-4f51-8688-e966b504fbd3/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:21:53,291 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f275f07d-780e-4f51-8688-e966b504fbd3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:21:53,313 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f275f07d-780e-4f51-8688-e966b504fbd3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-07 08:21:54,712 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 08:21:54,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:21:54,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 81 conjunts are in the unsatisfiable core [2021-11-07 08:21:54,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:21:55,470 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 66 proven. 165 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:21:55,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1567615043] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:21:55,470 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:21:55,470 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 36 [2021-11-07 08:21:55,471 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943576133] [2021-11-07 08:21:55,471 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-11-07 08:21:55,471 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:21:55,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-11-07 08:21:55,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=1189, Unknown=0, NotChecked=0, Total=1332 [2021-11-07 08:21:55,472 INFO L87 Difference]: Start difference. First operand 87 states and 89 transitions. Second operand has 37 states, 34 states have (on average 3.4705882352941178) internal successors, (118), 34 states have internal predecessors, (118), 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) [2021-11-07 08:21:56,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:21:56,633 INFO L93 Difference]: Finished difference Result 95 states and 97 transitions. [2021-11-07 08:21:56,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-07 08:21:56,634 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 34 states have (on average 3.4705882352941178) internal successors, (118), 34 states have internal predecessors, (118), 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 86 [2021-11-07 08:21:56,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:21:56,635 INFO L225 Difference]: With dead ends: 95 [2021-11-07 08:21:56,635 INFO L226 Difference]: Without dead ends: 95 [2021-11-07 08:21:56,635 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 73 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 525 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=279, Invalid=2171, Unknown=0, NotChecked=0, Total=2450 [2021-11-07 08:21:56,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-11-07 08:21:56,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 93. [2021-11-07 08:21:56,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 88 states have (on average 1.0340909090909092) internal successors, (91), 88 states have internal predecessors, (91), 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) [2021-11-07 08:21:56,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 95 transitions. [2021-11-07 08:21:56,639 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 95 transitions. Word has length 86 [2021-11-07 08:21:56,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:21:56,639 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 95 transitions. [2021-11-07 08:21:56,639 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 34 states have (on average 3.4705882352941178) internal successors, (118), 34 states have internal predecessors, (118), 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) [2021-11-07 08:21:56,639 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 95 transitions. [2021-11-07 08:21:56,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-07 08:21:56,640 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:21:56,640 INFO L513 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:21:56,666 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f275f07d-780e-4f51-8688-e966b504fbd3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2021-11-07 08:21:56,846 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f275f07d-780e-4f51-8688-e966b504fbd3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:21:56,846 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting cstrncpyErr1REQUIRES_VIOLATION === [cstrncpyErr0REQUIRES_VIOLATION, cstrncpyErr1REQUIRES_VIOLATION, cstrncpyErr2REQUIRES_VIOLATION, cstrncpyErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-07 08:21:56,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:21:56,847 INFO L85 PathProgramCache]: Analyzing trace with hash -1069819477, now seen corresponding path program 11 times [2021-11-07 08:21:56,847 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:21:56,847 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582877094] [2021-11-07 08:21:56,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:21:56,868 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:21:56,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:21:58,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:21:58,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:21:58,233 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 30 proven. 245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:21:58,234 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:21:58,234 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582877094] [2021-11-07 08:21:58,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582877094] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:21:58,234 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784241583] [2021-11-07 08:21:58,234 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 08:21:58,235 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:21:58,235 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f275f07d-780e-4f51-8688-e966b504fbd3/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:21:58,237 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f275f07d-780e-4f51-8688-e966b504fbd3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:21:58,239 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f275f07d-780e-4f51-8688-e966b504fbd3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-07 08:22:00,567 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-11-07 08:22:00,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:22:00,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 140 conjunts are in the unsatisfiable core [2021-11-07 08:22:00,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:22:00,611 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 [2021-11-07 08:22:01,192 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 [2021-11-07 08:22:01,600 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 28 treesize of output 27 [2021-11-07 08:22:01,789 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 21 treesize of output 20 [2021-11-07 08:22:01,957 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 21 treesize of output 20 [2021-11-07 08:22:02,084 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 21 treesize of output 20 [2021-11-07 08:22:02,206 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 21 treesize of output 20 [2021-11-07 08:22:02,320 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 21 treesize of output 20 [2021-11-07 08:22:02,426 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-07 08:22:02,426 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 [2021-11-07 08:22:02,447 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 [2021-11-07 08:22:02,462 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 30 proven. 245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:22:02,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1784241583] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:22:02,462 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:22:02,462 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 32] total 61 [2021-11-07 08:22:02,462 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202149006] [2021-11-07 08:22:02,463 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2021-11-07 08:22:02,463 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:22:02,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2021-11-07 08:22:02,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=3495, Unknown=0, NotChecked=0, Total=3660 [2021-11-07 08:22:02,465 INFO L87 Difference]: Start difference. First operand 93 states and 95 transitions. Second operand has 61 states, 59 states have (on average 2.4237288135593222) internal successors, (143), 58 states have internal predecessors, (143), 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) [2021-11-07 08:22:05,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:22:05,420 INFO L93 Difference]: Finished difference Result 150 states and 152 transitions. [2021-11-07 08:22:05,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-07 08:22:05,421 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 59 states have (on average 2.4237288135593222) internal successors, (143), 58 states have internal predecessors, (143), 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 92 [2021-11-07 08:22:05,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:22:05,422 INFO L225 Difference]: With dead ends: 150 [2021-11-07 08:22:05,422 INFO L226 Difference]: Without dead ends: 100 [2021-11-07 08:22:05,423 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1156 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=321, Invalid=6651, Unknown=0, NotChecked=0, Total=6972 [2021-11-07 08:22:05,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-11-07 08:22:05,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 97. [2021-11-07 08:22:05,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 92 states have (on average 1.0326086956521738) internal successors, (95), 92 states have internal predecessors, (95), 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) [2021-11-07 08:22:05,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 99 transitions. [2021-11-07 08:22:05,427 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 99 transitions. Word has length 92 [2021-11-07 08:22:05,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:22:05,428 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 99 transitions. [2021-11-07 08:22:05,428 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 59 states have (on average 2.4237288135593222) internal successors, (143), 58 states have internal predecessors, (143), 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) [2021-11-07 08:22:05,428 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 99 transitions. [2021-11-07 08:22:05,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-07 08:22:05,429 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:22:05,429 INFO L513 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:22:05,444 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f275f07d-780e-4f51-8688-e966b504fbd3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-07 08:22:05,639 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f275f07d-780e-4f51-8688-e966b504fbd3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-11-07 08:22:05,639 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting cstrncpyErr1REQUIRES_VIOLATION === [cstrncpyErr0REQUIRES_VIOLATION, cstrncpyErr1REQUIRES_VIOLATION, cstrncpyErr2REQUIRES_VIOLATION, cstrncpyErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-07 08:22:05,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:22:05,640 INFO L85 PathProgramCache]: Analyzing trace with hash 1158122888, now seen corresponding path program 12 times [2021-11-07 08:22:05,640 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:22:05,640 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869684380] [2021-11-07 08:22:05,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:22:05,640 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:22:05,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:22:06,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:22:06,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:22:06,308 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 66 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:22:06,308 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:22:06,308 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869684380] [2021-11-07 08:22:06,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869684380] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:22:06,309 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381962882] [2021-11-07 08:22:06,309 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 08:22:06,309 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:22:06,309 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f275f07d-780e-4f51-8688-e966b504fbd3/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:22:06,310 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f275f07d-780e-4f51-8688-e966b504fbd3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:22:06,325 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f275f07d-780e-4f51-8688-e966b504fbd3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-07 08:22:08,379 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-11-07 08:22:08,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:22:08,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 468 conjuncts, 78 conjunts are in the unsatisfiable core [2021-11-07 08:22:08,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:22:08,427 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-07 08:22:08,427 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 [2021-11-07 08:22:09,933 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 91 proven. 213 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:22:09,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [381962882] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:22:09,933 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:22:09,933 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 23] total 47 [2021-11-07 08:22:09,934 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804939482] [2021-11-07 08:22:09,934 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-11-07 08:22:09,934 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:22:09,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-11-07 08:22:09,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=2036, Unknown=0, NotChecked=0, Total=2256 [2021-11-07 08:22:09,935 INFO L87 Difference]: Start difference. First operand 97 states and 99 transitions. Second operand has 48 states, 46 states have (on average 3.9130434782608696) internal successors, (180), 45 states have internal predecessors, (180), 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) [2021-11-07 08:22:12,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:22:12,044 INFO L93 Difference]: Finished difference Result 105 states and 107 transitions. [2021-11-07 08:22:12,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-07 08:22:12,044 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 46 states have (on average 3.9130434782608696) internal successors, (180), 45 states have internal predecessors, (180), 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 96 [2021-11-07 08:22:12,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:22:12,045 INFO L225 Difference]: With dead ends: 105 [2021-11-07 08:22:12,045 INFO L226 Difference]: Without dead ends: 105 [2021-11-07 08:22:12,046 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1052 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=538, Invalid=4154, Unknown=0, NotChecked=0, Total=4692 [2021-11-07 08:22:12,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-11-07 08:22:12,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 103. [2021-11-07 08:22:12,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 98 states have (on average 1.030612244897959) internal successors, (101), 98 states have internal predecessors, (101), 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) [2021-11-07 08:22:12,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 105 transitions. [2021-11-07 08:22:12,050 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 105 transitions. Word has length 96 [2021-11-07 08:22:12,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:22:12,050 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 105 transitions. [2021-11-07 08:22:12,050 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 46 states have (on average 3.9130434782608696) internal successors, (180), 45 states have internal predecessors, (180), 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) [2021-11-07 08:22:12,050 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 105 transitions. [2021-11-07 08:22:12,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-07 08:22:12,051 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:22:12,051 INFO L513 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:22:12,078 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f275f07d-780e-4f51-8688-e966b504fbd3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-07 08:22:12,258 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f275f07d-780e-4f51-8688-e966b504fbd3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-11-07 08:22:12,258 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting cstrncpyErr1REQUIRES_VIOLATION === [cstrncpyErr0REQUIRES_VIOLATION, cstrncpyErr1REQUIRES_VIOLATION, cstrncpyErr2REQUIRES_VIOLATION, cstrncpyErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-07 08:22:12,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:22:12,259 INFO L85 PathProgramCache]: Analyzing trace with hash -976483898, now seen corresponding path program 13 times [2021-11-07 08:22:12,259 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:22:12,259 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696500064] [2021-11-07 08:22:12,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:22:12,259 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:22:12,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:22:13,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:22:13,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:22:13,807 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 34 proven. 320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:22:13,807 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:22:13,807 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696500064] [2021-11-07 08:22:13,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696500064] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:22:13,807 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405658258] [2021-11-07 08:22:13,807 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 08:22:13,807 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:22:13,808 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f275f07d-780e-4f51-8688-e966b504fbd3/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:22:13,809 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f275f07d-780e-4f51-8688-e966b504fbd3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:22:13,810 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f275f07d-780e-4f51-8688-e966b504fbd3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-07 08:22:14,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:22:14,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 501 conjuncts, 155 conjunts are in the unsatisfiable core [2021-11-07 08:22:14,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:22:14,971 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 [2021-11-07 08:22:15,724 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 [2021-11-07 08:22:16,184 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 28 treesize of output 27 [2021-11-07 08:22:16,349 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 21 treesize of output 20 [2021-11-07 08:22:16,493 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 21 treesize of output 20 [2021-11-07 08:22:16,606 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 21 treesize of output 20 [2021-11-07 08:22:16,726 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 21 treesize of output 20 [2021-11-07 08:22:16,839 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 21 treesize of output 20 [2021-11-07 08:22:16,951 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 21 treesize of output 20 [2021-11-07 08:22:17,073 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-07 08:22:17,073 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 [2021-11-07 08:22:17,096 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 [2021-11-07 08:22:17,114 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 34 proven. 320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:22:17,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405658258] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:22:17,114 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:22:17,115 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 35] total 67 [2021-11-07 08:22:17,115 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836852805] [2021-11-07 08:22:17,115 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2021-11-07 08:22:17,115 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:22:17,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2021-11-07 08:22:17,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=4240, Unknown=0, NotChecked=0, Total=4422 [2021-11-07 08:22:17,117 INFO L87 Difference]: Start difference. First operand 103 states and 105 transitions. Second operand has 67 states, 65 states have (on average 2.4615384615384617) internal successors, (160), 64 states have internal predecessors, (160), 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) [2021-11-07 08:22:20,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:22:20,721 INFO L93 Difference]: Finished difference Result 166 states and 168 transitions. [2021-11-07 08:22:20,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-11-07 08:22:20,722 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 65 states have (on average 2.4615384615384617) internal successors, (160), 64 states have internal predecessors, (160), 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 102 [2021-11-07 08:22:20,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:22:20,723 INFO L225 Difference]: With dead ends: 166 [2021-11-07 08:22:20,723 INFO L226 Difference]: Without dead ends: 110 [2021-11-07 08:22:20,725 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1414 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=350, Invalid=8022, Unknown=0, NotChecked=0, Total=8372 [2021-11-07 08:22:20,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-11-07 08:22:20,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 107. [2021-11-07 08:22:20,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 102 states have (on average 1.0294117647058822) internal successors, (105), 102 states have internal predecessors, (105), 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) [2021-11-07 08:22:20,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 109 transitions. [2021-11-07 08:22:20,729 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 109 transitions. Word has length 102 [2021-11-07 08:22:20,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:22:20,730 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 109 transitions. [2021-11-07 08:22:20,730 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 65 states have (on average 2.4615384615384617) internal successors, (160), 64 states have internal predecessors, (160), 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) [2021-11-07 08:22:20,730 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 109 transitions. [2021-11-07 08:22:20,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-07 08:22:20,731 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:22:20,731 INFO L513 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:22:20,769 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f275f07d-780e-4f51-8688-e966b504fbd3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-07 08:22:20,946 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f275f07d-780e-4f51-8688-e966b504fbd3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-11-07 08:22:20,946 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting cstrncpyErr1REQUIRES_VIOLATION === [cstrncpyErr0REQUIRES_VIOLATION, cstrncpyErr1REQUIRES_VIOLATION, cstrncpyErr2REQUIRES_VIOLATION, cstrncpyErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-07 08:22:20,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:22:20,947 INFO L85 PathProgramCache]: Analyzing trace with hash 2067942755, now seen corresponding path program 14 times [2021-11-07 08:22:20,947 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:22:20,947 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995692239] [2021-11-07 08:22:20,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:22:20,947 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:22:20,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:22:21,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:22:21,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:22:21,694 INFO L134 CoverageAnalysis]: Checked inductivity of 387 backedges. 91 proven. 296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:22:21,694 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:22:21,694 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995692239] [2021-11-07 08:22:21,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995692239] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:22:21,695 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263429462] [2021-11-07 08:22:21,695 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 08:22:21,695 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:22:21,695 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f275f07d-780e-4f51-8688-e966b504fbd3/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:22:21,699 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f275f07d-780e-4f51-8688-e966b504fbd3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:22:21,726 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f275f07d-780e-4f51-8688-e966b504fbd3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-07 08:22:23,098 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 08:22:23,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:22:23,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 512 conjuncts, 99 conjunts are in the unsatisfiable core [2021-11-07 08:22:23,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:22:24,011 INFO L134 CoverageAnalysis]: Checked inductivity of 387 backedges. 120 proven. 267 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:22:24,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1263429462] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:22:24,011 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:22:24,011 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26] total 42 [2021-11-07 08:22:24,012 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790924349] [2021-11-07 08:22:24,012 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-11-07 08:22:24,012 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:22:24,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-11-07 08:22:24,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=1606, Unknown=0, NotChecked=0, Total=1806 [2021-11-07 08:22:24,013 INFO L87 Difference]: Start difference. First operand 107 states and 109 transitions. Second operand has 43 states, 40 states have (on average 3.65) internal successors, (146), 40 states have internal predecessors, (146), 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) [2021-11-07 08:22:25,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:22:25,674 INFO L93 Difference]: Finished difference Result 115 states and 117 transitions. [2021-11-07 08:22:25,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-07 08:22:25,674 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 40 states have (on average 3.65) internal successors, (146), 40 states have internal predecessors, (146), 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 106 [2021-11-07 08:22:25,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:22:25,676 INFO L225 Difference]: With dead ends: 115 [2021-11-07 08:22:25,676 INFO L226 Difference]: Without dead ends: 115 [2021-11-07 08:22:25,677 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 91 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 776 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=360, Invalid=2946, Unknown=0, NotChecked=0, Total=3306 [2021-11-07 08:22:25,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-11-07 08:22:25,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 113. [2021-11-07 08:22:25,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 108 states have (on average 1.0277777777777777) internal successors, (111), 108 states have internal predecessors, (111), 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) [2021-11-07 08:22:25,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 115 transitions. [2021-11-07 08:22:25,682 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 115 transitions. Word has length 106 [2021-11-07 08:22:25,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:22:25,682 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 115 transitions. [2021-11-07 08:22:25,682 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 40 states have (on average 3.65) internal successors, (146), 40 states have internal predecessors, (146), 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) [2021-11-07 08:22:25,683 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 115 transitions. [2021-11-07 08:22:25,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-07 08:22:25,684 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:22:25,684 INFO L513 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:22:25,725 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f275f07d-780e-4f51-8688-e966b504fbd3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-11-07 08:22:25,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f275f07d-780e-4f51-8688-e966b504fbd3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:22:25,899 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting cstrncpyErr1REQUIRES_VIOLATION === [cstrncpyErr0REQUIRES_VIOLATION, cstrncpyErr1REQUIRES_VIOLATION, cstrncpyErr2REQUIRES_VIOLATION, cstrncpyErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-07 08:22:25,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:22:25,899 INFO L85 PathProgramCache]: Analyzing trace with hash -273663647, now seen corresponding path program 15 times [2021-11-07 08:22:25,899 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:22:25,899 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578415533] [2021-11-07 08:22:25,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:22:25,899 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:22:25,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:22:27,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:22:27,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:22:27,818 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 38 proven. 405 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:22:27,819 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:22:27,819 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578415533] [2021-11-07 08:22:27,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578415533] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:22:27,819 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420037641] [2021-11-07 08:22:27,820 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 08:22:27,820 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:22:27,820 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f275f07d-780e-4f51-8688-e966b504fbd3/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:22:27,832 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f275f07d-780e-4f51-8688-e966b504fbd3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:22:27,833 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f275f07d-780e-4f51-8688-e966b504fbd3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-07 08:22:30,548 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-11-07 08:22:30,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:22:30,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 545 conjuncts, 226 conjunts are in the unsatisfiable core [2021-11-07 08:22:30,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:22:30,591 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 [2021-11-07 08:22:31,699 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 [2021-11-07 08:22:32,250 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 27 treesize of output 26 [2021-11-07 08:22:32,589 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 27 treesize of output 26 [2021-11-07 08:22:32,892 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 27 treesize of output 26 [2021-11-07 08:22:33,209 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 27 treesize of output 26 [2021-11-07 08:22:33,546 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 27 treesize of output 26 [2021-11-07 08:22:33,879 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 27 treesize of output 26 [2021-11-07 08:22:34,218 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 27 treesize of output 26 [2021-11-07 08:22:34,592 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 27 treesize of output 26 [2021-11-07 08:22:34,925 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-11-07 08:22:34,925 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 31 treesize of output 30 [2021-11-07 08:22:35,206 INFO L354 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2021-11-07 08:22:35,206 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 23 treesize of output 16 [2021-11-07 08:22:35,220 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 38 proven. 405 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:22:35,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1420037641] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:22:35,220 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:22:35,220 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 38] total 83 [2021-11-07 08:22:35,220 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085393013] [2021-11-07 08:22:35,221 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2021-11-07 08:22:35,221 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:22:35,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2021-11-07 08:22:35,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=6567, Unknown=0, NotChecked=0, Total=6806 [2021-11-07 08:22:35,222 INFO L87 Difference]: Start difference. First operand 113 states and 115 transitions. Second operand has 83 states, 81 states have (on average 2.54320987654321) internal successors, (206), 80 states have internal predecessors, (206), 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) [2021-11-07 08:22:41,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:22:41,401 INFO L93 Difference]: Finished difference Result 182 states and 184 transitions. [2021-11-07 08:22:41,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-11-07 08:22:41,401 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 81 states have (on average 2.54320987654321) internal successors, (206), 80 states have internal predecessors, (206), 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 112 [2021-11-07 08:22:41,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:22:41,402 INFO L225 Difference]: With dead ends: 182 [2021-11-07 08:22:41,402 INFO L226 Difference]: Without dead ends: 120 [2021-11-07 08:22:41,403 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2720 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=536, Invalid=11020, Unknown=0, NotChecked=0, Total=11556 [2021-11-07 08:22:41,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-11-07 08:22:41,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 117. [2021-11-07 08:22:41,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 112 states have (on average 1.0267857142857142) internal successors, (115), 112 states have internal predecessors, (115), 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) [2021-11-07 08:22:41,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 119 transitions. [2021-11-07 08:22:41,409 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 119 transitions. Word has length 112 [2021-11-07 08:22:41,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:22:41,409 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 119 transitions. [2021-11-07 08:22:41,409 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 81 states have (on average 2.54320987654321) internal successors, (206), 80 states have internal predecessors, (206), 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) [2021-11-07 08:22:41,410 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 119 transitions. [2021-11-07 08:22:41,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-07 08:22:41,411 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:22:41,411 INFO L513 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:22:41,439 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f275f07d-780e-4f51-8688-e966b504fbd3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2021-11-07 08:22:41,622 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f275f07d-780e-4f51-8688-e966b504fbd3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:22:41,622 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting cstrncpyErr1REQUIRES_VIOLATION === [cstrncpyErr0REQUIRES_VIOLATION, cstrncpyErr1REQUIRES_VIOLATION, cstrncpyErr2REQUIRES_VIOLATION, cstrncpyErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-07 08:22:41,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:22:41,623 INFO L85 PathProgramCache]: Analyzing trace with hash -189768514, now seen corresponding path program 16 times [2021-11-07 08:22:41,623 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:22:41,623 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854881471] [2021-11-07 08:22:41,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:22:41,623 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:22:41,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:22:42,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:22:42,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:22:42,384 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 120 proven. 360 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:22:42,385 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:22:42,385 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854881471] [2021-11-07 08:22:42,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854881471] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:22:42,385 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233709115] [2021-11-07 08:22:42,386 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 08:22:42,386 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:22:42,386 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f275f07d-780e-4f51-8688-e966b504fbd3/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:22:42,403 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f275f07d-780e-4f51-8688-e966b504fbd3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:22:42,422 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f275f07d-780e-4f51-8688-e966b504fbd3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-07 08:22:44,492 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 08:22:44,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:22:44,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 556 conjuncts, 113 conjunts are in the unsatisfiable core [2021-11-07 08:22:44,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:22:45,710 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 153 proven. 327 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:22:45,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1233709115] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:22:45,710 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:22:45,710 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 27] total 44 [2021-11-07 08:22:45,710 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139137391] [2021-11-07 08:22:45,711 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-11-07 08:22:45,711 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:22:45,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-11-07 08:22:45,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=1749, Unknown=0, NotChecked=0, Total=1980 [2021-11-07 08:22:45,712 INFO L87 Difference]: Start difference. First operand 117 states and 119 transitions. Second operand has 45 states, 42 states have (on average 3.8095238095238093) internal successors, (160), 42 states have internal predecessors, (160), 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) [2021-11-07 08:22:47,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:22:47,271 INFO L93 Difference]: Finished difference Result 125 states and 127 transitions. [2021-11-07 08:22:47,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-07 08:22:47,271 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 42 states have (on average 3.8095238095238093) internal successors, (160), 42 states have internal predecessors, (160), 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 116 [2021-11-07 08:22:47,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:22:47,274 INFO L225 Difference]: With dead ends: 125 [2021-11-07 08:22:47,275 INFO L226 Difference]: Without dead ends: 125 [2021-11-07 08:22:47,275 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 101 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 884 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=402, Invalid=3258, Unknown=0, NotChecked=0, Total=3660 [2021-11-07 08:22:47,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-11-07 08:22:47,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 123. [2021-11-07 08:22:47,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 118 states have (on average 1.0254237288135593) internal successors, (121), 118 states have internal predecessors, (121), 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) [2021-11-07 08:22:47,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 125 transitions. [2021-11-07 08:22:47,280 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 125 transitions. Word has length 116 [2021-11-07 08:22:47,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:22:47,280 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 125 transitions. [2021-11-07 08:22:47,281 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 42 states have (on average 3.8095238095238093) internal successors, (160), 42 states have internal predecessors, (160), 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) [2021-11-07 08:22:47,281 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 125 transitions. [2021-11-07 08:22:47,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-11-07 08:22:47,282 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:22:47,282 INFO L513 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:22:47,313 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f275f07d-780e-4f51-8688-e966b504fbd3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-11-07 08:22:47,486 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f275f07d-780e-4f51-8688-e966b504fbd3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-11-07 08:22:47,486 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting cstrncpyErr1REQUIRES_VIOLATION === [cstrncpyErr0REQUIRES_VIOLATION, cstrncpyErr1REQUIRES_VIOLATION, cstrncpyErr2REQUIRES_VIOLATION, cstrncpyErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-07 08:22:47,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:22:47,487 INFO L85 PathProgramCache]: Analyzing trace with hash 1777211516, now seen corresponding path program 17 times [2021-11-07 08:22:47,487 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:22:47,487 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569045168] [2021-11-07 08:22:47,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:22:47,488 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:22:47,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:22:49,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:22:49,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:22:49,591 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 42 proven. 500 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:22:49,591 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:22:49,591 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569045168] [2021-11-07 08:22:49,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569045168] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:22:49,592 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033102791] [2021-11-07 08:22:49,592 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 08:22:49,592 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:22:49,592 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f275f07d-780e-4f51-8688-e966b504fbd3/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:22:49,612 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f275f07d-780e-4f51-8688-e966b504fbd3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:22:49,639 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f275f07d-780e-4f51-8688-e966b504fbd3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-07 08:22:55,931 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-11-07 08:22:55,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:22:55,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 589 conjuncts, 185 conjunts are in the unsatisfiable core [2021-11-07 08:22:55,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:22:55,990 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 [2021-11-07 08:22:56,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 [2021-11-07 08:22:57,514 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 28 treesize of output 27 [2021-11-07 08:22:57,675 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 21 treesize of output 20 [2021-11-07 08:22:57,794 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 21 treesize of output 20 [2021-11-07 08:22:57,914 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 21 treesize of output 20 [2021-11-07 08:22:58,034 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 21 treesize of output 20 [2021-11-07 08:22:58,149 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 21 treesize of output 20 [2021-11-07 08:22:58,268 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 21 treesize of output 20 [2021-11-07 08:22:58,424 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 21 treesize of output 20 [2021-11-07 08:22:58,567 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 21 treesize of output 20 [2021-11-07 08:22:58,684 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-07 08:22:58,684 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 [2021-11-07 08:22:58,704 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 [2021-11-07 08:22:58,719 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 42 proven. 500 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:22:58,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1033102791] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:22:58,720 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:22:58,720 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 41] total 79 [2021-11-07 08:22:58,720 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728972350] [2021-11-07 08:22:58,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2021-11-07 08:22:58,721 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:22:58,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2021-11-07 08:22:58,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=5946, Unknown=0, NotChecked=0, Total=6162 [2021-11-07 08:22:58,722 INFO L87 Difference]: Start difference. First operand 123 states and 125 transitions. Second operand has 79 states, 77 states have (on average 2.5194805194805197) internal successors, (194), 76 states have internal predecessors, (194), 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) [2021-11-07 08:23:03,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:23:03,727 INFO L93 Difference]: Finished difference Result 198 states and 200 transitions. [2021-11-07 08:23:03,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-11-07 08:23:03,727 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 77 states have (on average 2.5194805194805197) internal successors, (194), 76 states have internal predecessors, (194), 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 122 [2021-11-07 08:23:03,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:23:03,729 INFO L225 Difference]: With dead ends: 198 [2021-11-07 08:23:03,729 INFO L226 Difference]: Without dead ends: 130 [2021-11-07 08:23:03,730 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 96 SyntacticMatches, 1 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2008 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=408, Invalid=11148, Unknown=0, NotChecked=0, Total=11556 [2021-11-07 08:23:03,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-11-07 08:23:03,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 127. [2021-11-07 08:23:03,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 122 states have (on average 1.0245901639344261) internal successors, (125), 122 states have internal predecessors, (125), 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) [2021-11-07 08:23:03,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 129 transitions. [2021-11-07 08:23:03,735 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 129 transitions. Word has length 122 [2021-11-07 08:23:03,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:23:03,735 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 129 transitions. [2021-11-07 08:23:03,736 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 77 states have (on average 2.5194805194805197) internal successors, (194), 76 states have internal predecessors, (194), 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) [2021-11-07 08:23:03,736 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 129 transitions. [2021-11-07 08:23:03,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-11-07 08:23:03,737 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:23:03,737 INFO L513 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:23:03,748 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f275f07d-780e-4f51-8688-e966b504fbd3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-11-07 08:23:03,937 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f275f07d-780e-4f51-8688-e966b504fbd3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-11-07 08:23:03,938 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting cstrncpyErr1REQUIRES_VIOLATION === [cstrncpyErr0REQUIRES_VIOLATION, cstrncpyErr1REQUIRES_VIOLATION, cstrncpyErr2REQUIRES_VIOLATION, cstrncpyErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-07 08:23:03,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:23:03,938 INFO L85 PathProgramCache]: Analyzing trace with hash -1972147303, now seen corresponding path program 18 times [2021-11-07 08:23:03,938 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:23:03,938 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991352958] [2021-11-07 08:23:03,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:23:03,938 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:23:04,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:23:04,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:23:04,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:23:04,771 INFO L134 CoverageAnalysis]: Checked inductivity of 583 backedges. 153 proven. 430 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:23:04,772 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:23:04,772 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991352958] [2021-11-07 08:23:04,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991352958] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:23:04,772 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017083225] [2021-11-07 08:23:04,772 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 08:23:04,772 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:23:04,772 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f275f07d-780e-4f51-8688-e966b504fbd3/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:23:04,773 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f275f07d-780e-4f51-8688-e966b504fbd3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:23:04,774 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f275f07d-780e-4f51-8688-e966b504fbd3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-07 08:23:11,115 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-11-07 08:23:11,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:23:11,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 600 conjuncts, 99 conjunts are in the unsatisfiable core [2021-11-07 08:23:11,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:23:11,183 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-07 08:23:11,183 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 [2021-11-07 08:23:13,186 INFO L134 CoverageAnalysis]: Checked inductivity of 583 backedges. 190 proven. 393 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:23:13,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2017083225] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:23:13,186 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:23:13,187 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 29] total 59 [2021-11-07 08:23:13,187 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242589897] [2021-11-07 08:23:13,187 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2021-11-07 08:23:13,187 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:23:13,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-11-07 08:23:13,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=355, Invalid=3185, Unknown=0, NotChecked=0, Total=3540 [2021-11-07 08:23:13,188 INFO L87 Difference]: Start difference. First operand 127 states and 129 transitions. Second operand has 60 states, 58 states have (on average 4.137931034482759) internal successors, (240), 57 states have internal predecessors, (240), 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) [2021-11-07 08:23:16,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:23:16,494 INFO L93 Difference]: Finished difference Result 135 states and 137 transitions. [2021-11-07 08:23:16,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-11-07 08:23:16,495 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 58 states have (on average 4.137931034482759) internal successors, (240), 57 states have internal predecessors, (240), 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 126 [2021-11-07 08:23:16,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:23:16,496 INFO L225 Difference]: With dead ends: 135 [2021-11-07 08:23:16,496 INFO L226 Difference]: Without dead ends: 135 [2021-11-07 08:23:16,496 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1847 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=811, Invalid=6671, Unknown=0, NotChecked=0, Total=7482 [2021-11-07 08:23:16,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-11-07 08:23:16,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 133. [2021-11-07 08:23:16,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 128 states have (on average 1.0234375) internal successors, (131), 128 states have internal predecessors, (131), 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) [2021-11-07 08:23:16,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 135 transitions. [2021-11-07 08:23:16,500 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 135 transitions. Word has length 126 [2021-11-07 08:23:16,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:23:16,500 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 135 transitions. [2021-11-07 08:23:16,500 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 58 states have (on average 4.137931034482759) internal successors, (240), 57 states have internal predecessors, (240), 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) [2021-11-07 08:23:16,500 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 135 transitions. [2021-11-07 08:23:16,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-11-07 08:23:16,501 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:23:16,501 INFO L513 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:23:16,513 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f275f07d-780e-4f51-8688-e966b504fbd3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-11-07 08:23:16,701 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f275f07d-780e-4f51-8688-e966b504fbd3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-11-07 08:23:16,702 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting cstrncpyErr1REQUIRES_VIOLATION === [cstrncpyErr0REQUIRES_VIOLATION, cstrncpyErr1REQUIRES_VIOLATION, cstrncpyErr2REQUIRES_VIOLATION, cstrncpyErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-07 08:23:16,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:23:16,702 INFO L85 PathProgramCache]: Analyzing trace with hash 967005975, now seen corresponding path program 19 times [2021-11-07 08:23:16,702 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:23:16,702 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129748575] [2021-11-07 08:23:16,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:23:16,703 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:23:16,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:23:18,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:23:18,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:23:18,989 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 46 proven. 605 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:23:18,989 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:23:18,989 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129748575] [2021-11-07 08:23:18,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129748575] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:23:18,989 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969404860] [2021-11-07 08:23:18,989 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 08:23:18,990 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:23:18,990 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f275f07d-780e-4f51-8688-e966b504fbd3/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:23:18,994 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f275f07d-780e-4f51-8688-e966b504fbd3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:23:18,999 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f275f07d-780e-4f51-8688-e966b504fbd3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-11-07 08:23:20,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:23:20,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 633 conjuncts, 200 conjunts are in the unsatisfiable core [2021-11-07 08:23:20,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:23:20,862 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 [2021-11-07 08:23:21,981 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 [2021-11-07 08:23:22,491 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 28 treesize of output 27 [2021-11-07 08:23:22,651 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 21 treesize of output 20 [2021-11-07 08:23:22,775 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 21 treesize of output 20 [2021-11-07 08:23:22,896 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 21 treesize of output 20 [2021-11-07 08:23:23,015 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 21 treesize of output 20 [2021-11-07 08:23:23,167 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 21 treesize of output 20 [2021-11-07 08:23:23,325 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 21 treesize of output 20 [2021-11-07 08:23:23,481 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 21 treesize of output 20 [2021-11-07 08:23:23,615 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 21 treesize of output 20 [2021-11-07 08:23:23,742 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 21 treesize of output 20 [2021-11-07 08:23:23,864 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-07 08:23:23,865 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 [2021-11-07 08:23:23,885 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 [2021-11-07 08:23:23,916 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 46 proven. 605 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:23:23,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1969404860] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:23:23,916 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:23:23,917 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 44] total 85 [2021-11-07 08:23:23,917 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38380943] [2021-11-07 08:23:23,918 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2021-11-07 08:23:23,918 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:23:23,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2021-11-07 08:23:23,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=6907, Unknown=0, NotChecked=0, Total=7140 [2021-11-07 08:23:23,920 INFO L87 Difference]: Start difference. First operand 133 states and 135 transitions. Second operand has 85 states, 83 states have (on average 2.5421686746987953) internal successors, (211), 82 states have internal predecessors, (211), 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) [2021-11-07 08:23:29,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:23:29,410 INFO L93 Difference]: Finished difference Result 214 states and 216 transitions. [2021-11-07 08:23:29,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-11-07 08:23:29,410 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 83 states have (on average 2.5421686746987953) internal successors, (211), 82 states have internal predecessors, (211), 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 132 [2021-11-07 08:23:29,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:23:29,412 INFO L225 Difference]: With dead ends: 214 [2021-11-07 08:23:29,412 INFO L226 Difference]: Without dead ends: 140 [2021-11-07 08:23:29,413 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 104 SyntacticMatches, 1 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2344 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=437, Invalid=12903, Unknown=0, NotChecked=0, Total=13340 [2021-11-07 08:23:29,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-11-07 08:23:29,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 137. [2021-11-07 08:23:29,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 132 states have (on average 1.0227272727272727) internal successors, (135), 132 states have internal predecessors, (135), 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) [2021-11-07 08:23:29,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 139 transitions. [2021-11-07 08:23:29,418 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 139 transitions. Word has length 132 [2021-11-07 08:23:29,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:23:29,419 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 139 transitions. [2021-11-07 08:23:29,419 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 83 states have (on average 2.5421686746987953) internal successors, (211), 82 states have internal predecessors, (211), 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) [2021-11-07 08:23:29,419 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 139 transitions. [2021-11-07 08:23:29,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-11-07 08:23:29,420 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:23:29,421 INFO L513 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:23:29,454 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f275f07d-780e-4f51-8688-e966b504fbd3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-11-07 08:23:29,630 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f275f07d-780e-4f51-8688-e966b504fbd3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:23:29,630 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting cstrncpyErr1REQUIRES_VIOLATION === [cstrncpyErr0REQUIRES_VIOLATION, cstrncpyErr1REQUIRES_VIOLATION, cstrncpyErr2REQUIRES_VIOLATION, cstrncpyErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-07 08:23:29,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:23:29,631 INFO L85 PathProgramCache]: Analyzing trace with hash 1002777076, now seen corresponding path program 20 times [2021-11-07 08:23:29,631 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:23:29,631 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992667758] [2021-11-07 08:23:29,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:23:29,631 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:23:29,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:23:30,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:23:30,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:23:30,534 INFO L134 CoverageAnalysis]: Checked inductivity of 696 backedges. 190 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:23:30,534 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:23:30,534 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992667758] [2021-11-07 08:23:30,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992667758] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:23:30,535 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068099816] [2021-11-07 08:23:30,535 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 08:23:30,535 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:23:30,535 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f275f07d-780e-4f51-8688-e966b504fbd3/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:23:30,536 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f275f07d-780e-4f51-8688-e966b504fbd3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:23:30,538 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f275f07d-780e-4f51-8688-e966b504fbd3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-11-07 08:23:32,538 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 08:23:32,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:23:32,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 644 conjuncts, 126 conjunts are in the unsatisfiable core [2021-11-07 08:23:32,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:23:33,724 INFO L134 CoverageAnalysis]: Checked inductivity of 696 backedges. 231 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:23:33,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2068099816] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:23:33,724 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:23:33,725 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32] total 51 [2021-11-07 08:23:33,725 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238711213] [2021-11-07 08:23:33,725 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-11-07 08:23:33,725 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:23:33,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-11-07 08:23:33,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=308, Invalid=2344, Unknown=0, NotChecked=0, Total=2652 [2021-11-07 08:23:33,727 INFO L87 Difference]: Start difference. First operand 137 states and 139 transitions. Second operand has 52 states, 49 states have (on average 3.836734693877551) internal successors, (188), 49 states have internal predecessors, (188), 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) [2021-11-07 08:23:35,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:23:35,904 INFO L93 Difference]: Finished difference Result 145 states and 147 transitions. [2021-11-07 08:23:35,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-07 08:23:35,905 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 49 states have (on average 3.836734693877551) internal successors, (188), 49 states have internal predecessors, (188), 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 136 [2021-11-07 08:23:35,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:23:35,906 INFO L225 Difference]: With dead ends: 145 [2021-11-07 08:23:35,906 INFO L226 Difference]: Without dead ends: 145 [2021-11-07 08:23:35,906 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 118 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1235 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=504, Invalid=4326, Unknown=0, NotChecked=0, Total=4830 [2021-11-07 08:23:35,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-11-07 08:23:35,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 143. [2021-11-07 08:23:35,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 138 states have (on average 1.0217391304347827) internal successors, (141), 138 states have internal predecessors, (141), 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) [2021-11-07 08:23:35,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 145 transitions. [2021-11-07 08:23:35,909 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 145 transitions. Word has length 136 [2021-11-07 08:23:35,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:23:35,909 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 145 transitions. [2021-11-07 08:23:35,909 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 49 states have (on average 3.836734693877551) internal successors, (188), 49 states have internal predecessors, (188), 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) [2021-11-07 08:23:35,910 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 145 transitions. [2021-11-07 08:23:35,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-11-07 08:23:35,911 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:23:35,911 INFO L513 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:23:35,936 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f275f07d-780e-4f51-8688-e966b504fbd3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-11-07 08:23:36,114 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f275f07d-780e-4f51-8688-e966b504fbd3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:23:36,114 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting cstrncpyErr1REQUIRES_VIOLATION === [cstrncpyErr0REQUIRES_VIOLATION, cstrncpyErr1REQUIRES_VIOLATION, cstrncpyErr2REQUIRES_VIOLATION, cstrncpyErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-07 08:23:36,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:23:36,115 INFO L85 PathProgramCache]: Analyzing trace with hash -1744460494, now seen corresponding path program 21 times [2021-11-07 08:23:36,115 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:23:36,115 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488366079] [2021-11-07 08:23:36,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:23:36,115 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:23:36,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:23:38,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:23:38,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:23:38,675 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 50 proven. 720 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:23:38,675 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:23:38,675 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488366079] [2021-11-07 08:23:38,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488366079] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:23:38,675 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167669276] [2021-11-07 08:23:38,675 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 08:23:38,676 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:23:38,676 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f275f07d-780e-4f51-8688-e966b504fbd3/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:23:38,676 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f275f07d-780e-4f51-8688-e966b504fbd3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:23:38,677 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f275f07d-780e-4f51-8688-e966b504fbd3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-11-07 08:23:57,911 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-11-07 08:23:57,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:23:57,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 677 conjuncts, 223 conjunts are in the unsatisfiable core [2021-11-07 08:23:57,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:23:57,982 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 [2021-11-07 08:23:58,875 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 [2021-11-07 08:23:59,050 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 [2021-11-07 08:23:59,260 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 [2021-11-07 08:23:59,457 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 [2021-11-07 08:23:59,626 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 [2021-11-07 08:23:59,815 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 [2021-11-07 08:24:00,016 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 [2021-11-07 08:24:00,224 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 [2021-11-07 08:24:00,427 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 [2021-11-07 08:24:00,637 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 [2021-11-07 08:24:00,873 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 [2021-11-07 08:24:01,085 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 [2021-11-07 08:24:01,291 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-07 08:24:01,291 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 [2021-11-07 08:24:01,457 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 [2021-11-07 08:24:01,470 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 50 proven. 720 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:24:01,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1167669276] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:24:01,471 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:24:01,471 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 47] total 86 [2021-11-07 08:24:01,471 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089703966] [2021-11-07 08:24:01,471 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2021-11-07 08:24:01,471 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:24:01,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2021-11-07 08:24:01,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=7064, Unknown=0, NotChecked=0, Total=7310 [2021-11-07 08:24:01,473 INFO L87 Difference]: Start difference. First operand 143 states and 145 transitions. Second operand has 86 states, 85 states have (on average 2.552941176470588) internal successors, (217), 84 states have internal predecessors, (217), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:24:06,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:24:06,621 INFO L93 Difference]: Finished difference Result 230 states and 232 transitions. [2021-11-07 08:24:06,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-11-07 08:24:06,622 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 85 states have (on average 2.552941176470588) internal successors, (217), 84 states have internal predecessors, (217), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 142 [2021-11-07 08:24:06,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:24:06,623 INFO L225 Difference]: With dead ends: 230 [2021-11-07 08:24:06,623 INFO L226 Difference]: Without dead ends: 150 [2021-11-07 08:24:06,624 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 115 SyntacticMatches, 3 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2917 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=468, Invalid=13338, Unknown=0, NotChecked=0, Total=13806 [2021-11-07 08:24:06,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-11-07 08:24:06,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 147. [2021-11-07 08:24:06,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 142 states have (on average 1.0211267605633803) internal successors, (145), 142 states have internal predecessors, (145), 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) [2021-11-07 08:24:06,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 149 transitions. [2021-11-07 08:24:06,628 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 149 transitions. Word has length 142 [2021-11-07 08:24:06,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:24:06,629 INFO L470 AbstractCegarLoop]: Abstraction has 147 states and 149 transitions. [2021-11-07 08:24:06,629 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 85 states have (on average 2.552941176470588) internal successors, (217), 84 states have internal predecessors, (217), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:24:06,629 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 149 transitions. [2021-11-07 08:24:06,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-11-07 08:24:06,630 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:24:06,631 INFO L513 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:24:06,655 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f275f07d-780e-4f51-8688-e966b504fbd3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-11-07 08:24:06,849 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f275f07d-780e-4f51-8688-e966b504fbd3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-11-07 08:24:06,849 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting cstrncpyErr1REQUIRES_VIOLATION === [cstrncpyErr0REQUIRES_VIOLATION, cstrncpyErr1REQUIRES_VIOLATION, cstrncpyErr2REQUIRES_VIOLATION, cstrncpyErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-07 08:24:06,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:24:06,850 INFO L85 PathProgramCache]: Analyzing trace with hash 1224165327, now seen corresponding path program 22 times [2021-11-07 08:24:06,850 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:24:06,850 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561593341] [2021-11-07 08:24:06,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:24:06,850 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:24:06,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:24:07,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:24:07,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:24:07,884 INFO L134 CoverageAnalysis]: Checked inductivity of 819 backedges. 231 proven. 588 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:24:07,884 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:24:07,884 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561593341] [2021-11-07 08:24:07,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561593341] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:24:07,884 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667134551] [2021-11-07 08:24:07,885 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 08:24:07,885 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:24:07,885 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f275f07d-780e-4f51-8688-e966b504fbd3/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:24:07,887 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f275f07d-780e-4f51-8688-e966b504fbd3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:24:07,888 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f275f07d-780e-4f51-8688-e966b504fbd3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-11-07 08:24:12,003 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 08:24:12,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:24:12,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 688 conjuncts, 140 conjunts are in the unsatisfiable core [2021-11-07 08:24:12,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:24:13,528 INFO L134 CoverageAnalysis]: Checked inductivity of 819 backedges. 276 proven. 543 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:24:13,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [667134551] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:24:13,528 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:24:13,528 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 33] total 53 [2021-11-07 08:24:13,528 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285858873] [2021-11-07 08:24:13,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2021-11-07 08:24:13,529 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:24:13,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-11-07 08:24:13,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=348, Invalid=2514, Unknown=0, NotChecked=0, Total=2862 [2021-11-07 08:24:13,529 INFO L87 Difference]: Start difference. First operand 147 states and 149 transitions. Second operand has 54 states, 51 states have (on average 3.9607843137254903) internal successors, (202), 51 states have internal predecessors, (202), 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) [2021-11-07 08:24:15,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:24:15,758 INFO L93 Difference]: Finished difference Result 155 states and 157 transitions. [2021-11-07 08:24:15,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-07 08:24:15,759 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 51 states have (on average 3.9607843137254903) internal successors, (202), 51 states have internal predecessors, (202), 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 146 [2021-11-07 08:24:15,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:24:15,760 INFO L225 Difference]: With dead ends: 155 [2021-11-07 08:24:15,760 INFO L226 Difference]: Without dead ends: 155 [2021-11-07 08:24:15,761 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 128 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1367 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=555, Invalid=4701, Unknown=0, NotChecked=0, Total=5256 [2021-11-07 08:24:15,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-11-07 08:24:15,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 153. [2021-11-07 08:24:15,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 148 states have (on average 1.0202702702702702) internal successors, (151), 148 states have internal predecessors, (151), 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) [2021-11-07 08:24:15,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 155 transitions. [2021-11-07 08:24:15,765 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 155 transitions. Word has length 146 [2021-11-07 08:24:15,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:24:15,766 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 155 transitions. [2021-11-07 08:24:15,766 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 51 states have (on average 3.9607843137254903) internal successors, (202), 51 states have internal predecessors, (202), 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) [2021-11-07 08:24:15,767 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 155 transitions. [2021-11-07 08:24:15,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2021-11-07 08:24:15,768 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:24:15,768 INFO L513 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:24:15,827 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f275f07d-780e-4f51-8688-e966b504fbd3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-11-07 08:24:15,982 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f275f07d-780e-4f51-8688-e966b504fbd3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-11-07 08:24:15,982 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting cstrncpyErr1REQUIRES_VIOLATION === [cstrncpyErr0REQUIRES_VIOLATION, cstrncpyErr1REQUIRES_VIOLATION, cstrncpyErr2REQUIRES_VIOLATION, cstrncpyErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-07 08:24:15,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:24:15,983 INFO L85 PathProgramCache]: Analyzing trace with hash -849169715, now seen corresponding path program 23 times [2021-11-07 08:24:15,983 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:24:15,983 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415023264] [2021-11-07 08:24:15,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:24:15,983 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:24:16,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:24:19,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:24:19,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:24:19,045 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 54 proven. 845 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:24:19,045 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:24:19,045 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415023264] [2021-11-07 08:24:19,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415023264] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:24:19,045 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413482241] [2021-11-07 08:24:19,045 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 08:24:19,046 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:24:19,046 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f275f07d-780e-4f51-8688-e966b504fbd3/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:24:19,046 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f275f07d-780e-4f51-8688-e966b504fbd3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:24:19,047 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f275f07d-780e-4f51-8688-e966b504fbd3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-11-07 08:24:55,892 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2021-11-07 08:24:55,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:24:55,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 721 conjuncts, 229 conjunts are in the unsatisfiable core [2021-11-07 08:24:55,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:24:55,980 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 [2021-11-07 08:24:55,986 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 [2021-11-07 08:24:57,691 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 16 treesize of output 12 [2021-11-07 08:24:58,214 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 23 treesize of output 22 [2021-11-07 08:24:58,489 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 23 treesize of output 22 [2021-11-07 08:24:58,728 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 23 treesize of output 22 [2021-11-07 08:24:59,015 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 23 treesize of output 22 [2021-11-07 08:24:59,304 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 23 treesize of output 22 [2021-11-07 08:24:59,597 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 23 treesize of output 22 [2021-11-07 08:24:59,908 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 23 treesize of output 22 [2021-11-07 08:25:00,209 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 23 treesize of output 22 [2021-11-07 08:25:00,548 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 23 treesize of output 22 [2021-11-07 08:25:00,859 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 23 treesize of output 22 [2021-11-07 08:25:01,123 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 23 treesize of output 22 [2021-11-07 08:25:01,438 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 23 treesize of output 22 [2021-11-07 08:25:01,759 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-11-07 08:25:01,759 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 27 treesize of output 26 [2021-11-07 08:25:02,055 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 08:25:02,055 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 21 treesize of output 21 [2021-11-07 08:25:02,442 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 276 proven. 623 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:25:02,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413482241] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:25:02,442 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:25:02,442 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 49] total 112 [2021-11-07 08:25:02,442 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136627891] [2021-11-07 08:25:02,443 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 112 states [2021-11-07 08:25:02,443 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:25:02,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2021-11-07 08:25:02,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=340, Invalid=12092, Unknown=0, NotChecked=0, Total=12432 [2021-11-07 08:25:02,445 INFO L87 Difference]: Start difference. First operand 153 states and 155 transitions. Second operand has 112 states, 110 states have (on average 2.6545454545454548) internal successors, (292), 109 states have internal predecessors, (292), 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) [2021-11-07 08:25:15,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:25:15,888 INFO L93 Difference]: Finished difference Result 254 states and 256 transitions. [2021-11-07 08:25:15,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2021-11-07 08:25:15,889 INFO L78 Accepts]: Start accepts. Automaton has has 112 states, 110 states have (on average 2.6545454545454548) internal successors, (292), 109 states have internal predecessors, (292), 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 152 [2021-11-07 08:25:15,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:25:15,890 INFO L225 Difference]: With dead ends: 254 [2021-11-07 08:25:15,890 INFO L226 Difference]: Without dead ends: 168 [2021-11-07 08:25:15,892 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 196 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7115 ImplicationChecksByTransitivity, 14.0s TimeCoverageRelationStatistics Valid=1061, Invalid=37945, Unknown=0, NotChecked=0, Total=39006 [2021-11-07 08:25:15,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-11-07 08:25:15,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 163. [2021-11-07 08:25:15,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 158 states have (on average 1.018987341772152) internal successors, (161), 158 states have internal predecessors, (161), 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) [2021-11-07 08:25:15,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 165 transitions. [2021-11-07 08:25:15,897 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 165 transitions. Word has length 152 [2021-11-07 08:25:15,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:25:15,898 INFO L470 AbstractCegarLoop]: Abstraction has 163 states and 165 transitions. [2021-11-07 08:25:15,898 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 112 states, 110 states have (on average 2.6545454545454548) internal successors, (292), 109 states have internal predecessors, (292), 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) [2021-11-07 08:25:15,898 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 165 transitions. [2021-11-07 08:25:15,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2021-11-07 08:25:15,900 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:25:15,900 INFO L513 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:25:15,945 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f275f07d-780e-4f51-8688-e966b504fbd3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2021-11-07 08:25:16,114 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f275f07d-780e-4f51-8688-e966b504fbd3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:25:16,114 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting cstrncpyErr1REQUIRES_VIOLATION === [cstrncpyErr0REQUIRES_VIOLATION, cstrncpyErr1REQUIRES_VIOLATION, cstrncpyErr2REQUIRES_VIOLATION, cstrncpyErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-07 08:25:16,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:25:16,115 INFO L85 PathProgramCache]: Analyzing trace with hash -1944047640, now seen corresponding path program 24 times [2021-11-07 08:25:16,115 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:25:16,115 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791349642] [2021-11-07 08:25:16,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:25:16,115 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:25:16,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:25:19,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:25:19,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:25:19,349 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 58 proven. 980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:25:19,349 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:25:19,349 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791349642] [2021-11-07 08:25:19,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791349642] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:25:19,350 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361606303] [2021-11-07 08:25:19,350 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 08:25:19,350 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:25:19,350 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f275f07d-780e-4f51-8688-e966b504fbd3/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:25:19,351 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f275f07d-780e-4f51-8688-e966b504fbd3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:25:19,352 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f275f07d-780e-4f51-8688-e966b504fbd3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-11-07 08:25:57,992 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2021-11-07 08:25:57,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:25:58,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 765 conjuncts, 253 conjunts are in the unsatisfiable core [2021-11-07 08:25:58,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:25:58,091 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 [2021-11-07 08:25:59,529 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 [2021-11-07 08:26:00,117 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 28 treesize of output 27 [2021-11-07 08:26:00,273 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 21 treesize of output 20 [2021-11-07 08:26:00,408 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 21 treesize of output 20 [2021-11-07 08:26:00,607 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 21 treesize of output 20 [2021-11-07 08:26:00,743 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 21 treesize of output 20 [2021-11-07 08:26:00,887 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 21 treesize of output 20 [2021-11-07 08:26:01,027 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 21 treesize of output 20 [2021-11-07 08:26:01,165 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 21 treesize of output 20 [2021-11-07 08:26:01,308 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 21 treesize of output 20 [2021-11-07 08:26:01,448 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 21 treesize of output 20 [2021-11-07 08:26:01,600 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 21 treesize of output 20 [2021-11-07 08:26:01,746 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 21 treesize of output 20 [2021-11-07 08:26:01,887 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 21 treesize of output 20 [2021-11-07 08:26:02,026 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 [2021-11-07 08:26:02,193 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 [2021-11-07 08:26:02,206 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 58 proven. 980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:26:02,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [361606303] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:26:02,206 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:26:02,207 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 53] total 105 [2021-11-07 08:26:02,207 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332209839] [2021-11-07 08:26:02,207 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2021-11-07 08:26:02,208 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:26:02,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2021-11-07 08:26:02,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=290, Invalid=10630, Unknown=0, NotChecked=0, Total=10920 [2021-11-07 08:26:02,209 INFO L87 Difference]: Start difference. First operand 163 states and 165 transitions. Second operand has 105 states, 103 states have (on average 2.592233009708738) internal successors, (267), 102 states have internal predecessors, (267), 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) [2021-11-07 08:26:10,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:26:10,782 INFO L93 Difference]: Finished difference Result 262 states and 264 transitions. [2021-11-07 08:26:10,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-11-07 08:26:10,782 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 103 states have (on average 2.592233009708738) internal successors, (267), 102 states have internal predecessors, (267), 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 162 [2021-11-07 08:26:10,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:26:10,783 INFO L225 Difference]: With dead ends: 262 [2021-11-07 08:26:10,783 INFO L226 Difference]: Without dead ends: 170 [2021-11-07 08:26:10,784 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 126 SyntacticMatches, 1 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3710 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=534, Invalid=19488, Unknown=0, NotChecked=0, Total=20022 [2021-11-07 08:26:10,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-11-07 08:26:10,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 167. [2021-11-07 08:26:10,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 162 states have (on average 1.0185185185185186) internal successors, (165), 162 states have internal predecessors, (165), 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) [2021-11-07 08:26:10,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 169 transitions. [2021-11-07 08:26:10,788 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 169 transitions. Word has length 162 [2021-11-07 08:26:10,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:26:10,789 INFO L470 AbstractCegarLoop]: Abstraction has 167 states and 169 transitions. [2021-11-07 08:26:10,789 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 103 states have (on average 2.592233009708738) internal successors, (267), 102 states have internal predecessors, (267), 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) [2021-11-07 08:26:10,789 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 169 transitions. [2021-11-07 08:26:10,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2021-11-07 08:26:10,790 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:26:10,790 INFO L513 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:26:10,817 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f275f07d-780e-4f51-8688-e966b504fbd3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-11-07 08:26:11,006 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f275f07d-780e-4f51-8688-e966b504fbd3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-11-07 08:26:11,006 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting cstrncpyErr1REQUIRES_VIOLATION === [cstrncpyErr0REQUIRES_VIOLATION, cstrncpyErr1REQUIRES_VIOLATION, cstrncpyErr2REQUIRES_VIOLATION, cstrncpyErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-07 08:26:11,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:26:11,007 INFO L85 PathProgramCache]: Analyzing trace with hash -541367803, now seen corresponding path program 25 times [2021-11-07 08:26:11,007 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:26:11,007 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396602579] [2021-11-07 08:26:11,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:26:11,007 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:26:11,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:26:12,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:26:12,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:26:12,164 INFO L134 CoverageAnalysis]: Checked inductivity of 1095 backedges. 325 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:26:12,164 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:26:12,164 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396602579] [2021-11-07 08:26:12,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396602579] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:26:12,166 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816933463] [2021-11-07 08:26:12,166 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 08:26:12,167 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:26:12,167 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f275f07d-780e-4f51-8688-e966b504fbd3/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:26:12,168 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f275f07d-780e-4f51-8688-e966b504fbd3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:26:12,170 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f275f07d-780e-4f51-8688-e966b504fbd3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-11-07 08:26:14,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:26:14,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 776 conjuncts, 153 conjunts are in the unsatisfiable core [2021-11-07 08:26:14,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:26:16,466 INFO L134 CoverageAnalysis]: Checked inductivity of 1095 backedges. 378 proven. 717 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:26:16,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [816933463] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:26:16,466 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:26:16,466 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38] total 60 [2021-11-07 08:26:16,466 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243716486] [2021-11-07 08:26:16,479 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2021-11-07 08:26:16,479 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:26:16,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2021-11-07 08:26:16,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=443, Invalid=3217, Unknown=0, NotChecked=0, Total=3660 [2021-11-07 08:26:16,480 INFO L87 Difference]: Start difference. First operand 167 states and 169 transitions. Second operand has 61 states, 58 states have (on average 3.9655172413793105) internal successors, (230), 58 states have internal predecessors, (230), 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) [2021-11-07 08:26:19,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:26:19,289 INFO L93 Difference]: Finished difference Result 175 states and 177 transitions. [2021-11-07 08:26:19,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-11-07 08:26:19,289 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 58 states have (on average 3.9655172413793105) internal successors, (230), 58 states have internal predecessors, (230), 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 166 [2021-11-07 08:26:19,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:26:19,291 INFO L225 Difference]: With dead ends: 175 [2021-11-07 08:26:19,291 INFO L226 Difference]: Without dead ends: 175 [2021-11-07 08:26:19,292 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 145 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1793 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=675, Invalid=5967, Unknown=0, NotChecked=0, Total=6642 [2021-11-07 08:26:19,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-11-07 08:26:19,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 173. [2021-11-07 08:26:19,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 168 states have (on average 1.0178571428571428) internal successors, (171), 168 states have internal predecessors, (171), 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) [2021-11-07 08:26:19,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 175 transitions. [2021-11-07 08:26:19,296 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 175 transitions. Word has length 166 [2021-11-07 08:26:19,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:26:19,296 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 175 transitions. [2021-11-07 08:26:19,297 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 58 states have (on average 3.9655172413793105) internal successors, (230), 58 states have internal predecessors, (230), 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) [2021-11-07 08:26:19,297 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 175 transitions. [2021-11-07 08:26:19,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2021-11-07 08:26:19,298 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:26:19,298 INFO L513 BasicCegarLoop]: trace histogram [17, 16, 16, 16, 16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:26:19,330 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f275f07d-780e-4f51-8688-e966b504fbd3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-11-07 08:26:19,498 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f275f07d-780e-4f51-8688-e966b504fbd3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-11-07 08:26:19,498 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting cstrncpyErr1REQUIRES_VIOLATION === [cstrncpyErr0REQUIRES_VIOLATION, cstrncpyErr1REQUIRES_VIOLATION, cstrncpyErr2REQUIRES_VIOLATION, cstrncpyErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-07 08:26:19,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:26:19,499 INFO L85 PathProgramCache]: Analyzing trace with hash -876884861, now seen corresponding path program 26 times [2021-11-07 08:26:19,499 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:26:19,499 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196932446] [2021-11-07 08:26:19,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:26:19,499 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:26:19,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:26:23,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:26:23,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:26:23,190 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 62 proven. 1125 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:26:23,190 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:26:23,191 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196932446] [2021-11-07 08:26:23,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196932446] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:26:23,191 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752839705] [2021-11-07 08:26:23,191 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 08:26:23,191 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:26:23,191 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f275f07d-780e-4f51-8688-e966b504fbd3/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:26:23,192 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f275f07d-780e-4f51-8688-e966b504fbd3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:26:23,194 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f275f07d-780e-4f51-8688-e966b504fbd3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-11-07 08:26:26,081 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 08:26:26,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:26:26,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 809 conjuncts, 252 conjunts are in the unsatisfiable core [2021-11-07 08:26:26,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:26:26,130 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-07 08:26:26,131 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 [2021-11-07 08:26:26,139 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 [2021-11-07 08:26:28,257 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 16 treesize of output 12 [2021-11-07 08:26:29,084 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 32 treesize of output 31 [2021-11-07 08:26:29,493 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 32 treesize of output 31 [2021-11-07 08:26:29,928 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 32 treesize of output 31 [2021-11-07 08:26:30,362 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 32 treesize of output 31 [2021-11-07 08:26:30,838 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 32 treesize of output 31 [2021-11-07 08:26:31,244 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 32 treesize of output 31 [2021-11-07 08:26:31,691 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 32 treesize of output 31 [2021-11-07 08:26:32,148 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 32 treesize of output 31 [2021-11-07 08:26:32,626 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 32 treesize of output 31 [2021-11-07 08:26:33,126 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 32 treesize of output 31 [2021-11-07 08:26:33,556 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 32 treesize of output 31 [2021-11-07 08:26:34,068 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 32 treesize of output 31 [2021-11-07 08:26:34,646 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 32 treesize of output 31 [2021-11-07 08:26:35,231 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 32 treesize of output 31 [2021-11-07 08:26:35,668 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-11-07 08:26:35,669 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 36 treesize of output 35 [2021-11-07 08:26:36,139 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 08:26:36,139 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 30 treesize of output 30 [2021-11-07 08:26:36,670 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 378 proven. 809 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:26:36,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1752839705] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:26:36,671 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:26:36,671 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 56] total 127 [2021-11-07 08:26:36,672 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291131210] [2021-11-07 08:26:36,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 127 states [2021-11-07 08:26:36,673 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:26:36,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 127 interpolants. [2021-11-07 08:26:36,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=403, Invalid=15599, Unknown=0, NotChecked=0, Total=16002 [2021-11-07 08:26:36,674 INFO L87 Difference]: Start difference. First operand 173 states and 175 transitions. Second operand has 127 states, 125 states have (on average 2.656) internal successors, (332), 124 states have internal predecessors, (332), 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) [2021-11-07 08:26:59,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:26:59,106 INFO L93 Difference]: Finished difference Result 286 states and 288 transitions. [2021-11-07 08:26:59,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2021-11-07 08:26:59,106 INFO L78 Accepts]: Start accepts. Automaton has has 127 states, 125 states have (on average 2.656) internal successors, (332), 124 states have internal predecessors, (332), 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 172 [2021-11-07 08:26:59,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:26:59,108 INFO L225 Difference]: With dead ends: 286 [2021-11-07 08:26:59,108 INFO L226 Difference]: Without dead ends: 188 [2021-11-07 08:26:59,111 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 222 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9200 ImplicationChecksByTransitivity, 22.2s TimeCoverageRelationStatistics Valid=1239, Invalid=48713, Unknown=0, NotChecked=0, Total=49952 [2021-11-07 08:26:59,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-11-07 08:26:59,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 183. [2021-11-07 08:26:59,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 178 states have (on average 1.0168539325842696) internal successors, (181), 178 states have internal predecessors, (181), 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) [2021-11-07 08:26:59,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 185 transitions. [2021-11-07 08:26:59,114 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 185 transitions. Word has length 172 [2021-11-07 08:26:59,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:26:59,115 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 185 transitions. [2021-11-07 08:26:59,115 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 127 states, 125 states have (on average 2.656) internal successors, (332), 124 states have internal predecessors, (332), 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) [2021-11-07 08:26:59,115 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 185 transitions. [2021-11-07 08:26:59,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2021-11-07 08:26:59,117 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:26:59,117 INFO L513 BasicCegarLoop]: trace histogram [18, 17, 17, 17, 17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:26:59,174 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f275f07d-780e-4f51-8688-e966b504fbd3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-11-07 08:26:59,342 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f275f07d-780e-4f51-8688-e966b504fbd3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-11-07 08:26:59,342 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting cstrncpyErr1REQUIRES_VIOLATION === [cstrncpyErr0REQUIRES_VIOLATION, cstrncpyErr1REQUIRES_VIOLATION, cstrncpyErr2REQUIRES_VIOLATION, cstrncpyErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-07 08:26:59,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:26:59,343 INFO L85 PathProgramCache]: Analyzing trace with hash 600520862, now seen corresponding path program 27 times [2021-11-07 08:26:59,343 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:26:59,343 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235117644] [2021-11-07 08:26:59,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:26:59,343 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:26:59,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:27:03,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:27:03,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:27:03,386 INFO L134 CoverageAnalysis]: Checked inductivity of 1346 backedges. 66 proven. 1280 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:27:03,386 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:27:03,386 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235117644] [2021-11-07 08:27:03,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235117644] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:27:03,387 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991695152] [2021-11-07 08:27:03,387 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 08:27:03,387 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:27:03,387 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f275f07d-780e-4f51-8688-e966b504fbd3/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:27:03,388 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f275f07d-780e-4f51-8688-e966b504fbd3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:27:03,389 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f275f07d-780e-4f51-8688-e966b504fbd3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-11-07 08:27:32,936 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2021-11-07 08:27:32,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:27:32,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 853 conjuncts, 355 conjunts are in the unsatisfiable core [2021-11-07 08:27:32,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:27:33,027 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 [2021-11-07 08:27:35,335 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 [2021-11-07 08:27:36,062 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 27 treesize of output 26 [2021-11-07 08:27:36,463 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 27 treesize of output 26 [2021-11-07 08:27:36,881 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 27 treesize of output 26 [2021-11-07 08:27:37,283 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 27 treesize of output 26 [2021-11-07 08:27:37,643 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 27 treesize of output 26 [2021-11-07 08:27:38,050 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 27 treesize of output 26 [2021-11-07 08:27:38,462 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 27 treesize of output 26 [2021-11-07 08:27:38,891 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 27 treesize of output 26 [2021-11-07 08:27:39,302 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 27 treesize of output 26 [2021-11-07 08:27:39,667 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 27 treesize of output 26 [2021-11-07 08:27:40,080 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 27 treesize of output 26 [2021-11-07 08:27:40,495 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 27 treesize of output 26 [2021-11-07 08:27:40,920 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 27 treesize of output 26 [2021-11-07 08:27:41,352 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 27 treesize of output 26 [2021-11-07 08:27:41,874 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 27 treesize of output 26 [2021-11-07 08:27:42,307 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-11-07 08:27:42,308 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 31 treesize of output 30 [2021-11-07 08:27:42,640 INFO L354 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2021-11-07 08:27:42,641 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 23 treesize of output 16 [2021-11-07 08:27:42,657 INFO L134 CoverageAnalysis]: Checked inductivity of 1346 backedges. 66 proven. 1280 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:27:42,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [991695152] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:27:42,658 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:27:42,658 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 59] total 132 [2021-11-07 08:27:42,658 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936794061] [2021-11-07 08:27:42,662 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 132 states [2021-11-07 08:27:42,663 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:27:42,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2021-11-07 08:27:42,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=386, Invalid=16906, Unknown=0, NotChecked=0, Total=17292 [2021-11-07 08:27:42,665 INFO L87 Difference]: Start difference. First operand 183 states and 185 transitions. Second operand has 132 states, 130 states have (on average 2.6615384615384614) internal successors, (346), 129 states have internal predecessors, (346), 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) [2021-11-07 08:27:55,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:27:55,865 INFO L93 Difference]: Finished difference Result 294 states and 296 transitions. [2021-11-07 08:27:55,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-11-07 08:27:55,865 INFO L78 Accepts]: Start accepts. Automaton has has 132 states, 130 states have (on average 2.6615384615384614) internal successors, (346), 129 states have internal predecessors, (346), 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 182 [2021-11-07 08:27:55,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:27:55,867 INFO L225 Difference]: With dead ends: 294 [2021-11-07 08:27:55,867 INFO L226 Difference]: Without dead ends: 190 [2021-11-07 08:27:55,869 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7277 ImplicationChecksByTransitivity, 14.4s TimeCoverageRelationStatistics Valid=865, Invalid=28205, Unknown=0, NotChecked=0, Total=29070 [2021-11-07 08:27:55,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-11-07 08:27:55,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 187. [2021-11-07 08:27:55,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 182 states have (on average 1.0164835164835164) internal successors, (185), 182 states have internal predecessors, (185), 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) [2021-11-07 08:27:55,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 189 transitions. [2021-11-07 08:27:55,875 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 189 transitions. Word has length 182 [2021-11-07 08:27:55,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:27:55,875 INFO L470 AbstractCegarLoop]: Abstraction has 187 states and 189 transitions. [2021-11-07 08:27:55,876 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 132 states, 130 states have (on average 2.6615384615384614) internal successors, (346), 129 states have internal predecessors, (346), 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) [2021-11-07 08:27:55,876 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 189 transitions. [2021-11-07 08:27:55,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2021-11-07 08:27:55,877 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:27:55,878 INFO L513 BasicCegarLoop]: trace histogram [18, 17, 17, 17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:27:55,916 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f275f07d-780e-4f51-8688-e966b504fbd3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-11-07 08:27:56,103 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f275f07d-780e-4f51-8688-e966b504fbd3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-11-07 08:27:56,103 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting cstrncpyErr1REQUIRES_VIOLATION === [cstrncpyErr0REQUIRES_VIOLATION, cstrncpyErr1REQUIRES_VIOLATION, cstrncpyErr2REQUIRES_VIOLATION, cstrncpyErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-07 08:27:56,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:27:56,103 INFO L85 PathProgramCache]: Analyzing trace with hash -382911941, now seen corresponding path program 28 times [2021-11-07 08:27:56,104 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:27:56,104 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023659096] [2021-11-07 08:27:56,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:27:56,104 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:27:56,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:27:57,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:27:57,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:27:57,431 INFO L134 CoverageAnalysis]: Checked inductivity of 1411 backedges. 435 proven. 976 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:27:57,432 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:27:57,432 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023659096] [2021-11-07 08:27:57,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023659096] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:27:57,432 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260437762] [2021-11-07 08:27:57,432 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 08:27:57,432 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:27:57,432 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f275f07d-780e-4f51-8688-e966b504fbd3/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:27:57,433 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f275f07d-780e-4f51-8688-e966b504fbd3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:27:57,434 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f275f07d-780e-4f51-8688-e966b504fbd3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-11-07 08:28:04,539 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 08:28:04,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:28:04,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 864 conjuncts, 176 conjunts are in the unsatisfiable core [2021-11-07 08:28:04,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:28:06,654 INFO L134 CoverageAnalysis]: Checked inductivity of 1411 backedges. 496 proven. 915 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:28:06,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [260437762] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:28:06,654 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:28:06,654 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 41] total 65 [2021-11-07 08:28:06,655 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248690297] [2021-11-07 08:28:06,655 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2021-11-07 08:28:06,655 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:28:06,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-11-07 08:28:06,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=546, Invalid=3744, Unknown=0, NotChecked=0, Total=4290 [2021-11-07 08:28:06,656 INFO L87 Difference]: Start difference. First operand 187 states and 189 transitions. Second operand has 66 states, 63 states have (on average 4.095238095238095) internal successors, (258), 63 states have internal predecessors, (258), 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) [2021-11-07 08:28:09,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:28:09,734 INFO L93 Difference]: Finished difference Result 195 states and 197 transitions. [2021-11-07 08:28:09,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-11-07 08:28:09,735 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 63 states have (on average 4.095238095238095) internal successors, (258), 63 states have internal predecessors, (258), 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 186 [2021-11-07 08:28:09,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:28:09,737 INFO L225 Difference]: With dead ends: 195 [2021-11-07 08:28:09,737 INFO L226 Difference]: Without dead ends: 195 [2021-11-07 08:28:09,738 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 164 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2165 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=801, Invalid=7031, Unknown=0, NotChecked=0, Total=7832 [2021-11-07 08:28:09,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-11-07 08:28:09,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 193. [2021-11-07 08:28:09,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 188 states have (on average 1.0159574468085106) internal successors, (191), 188 states have internal predecessors, (191), 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) [2021-11-07 08:28:09,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 195 transitions. [2021-11-07 08:28:09,743 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 195 transitions. Word has length 186 [2021-11-07 08:28:09,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:28:09,744 INFO L470 AbstractCegarLoop]: Abstraction has 193 states and 195 transitions. [2021-11-07 08:28:09,744 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 63 states have (on average 4.095238095238095) internal successors, (258), 63 states have internal predecessors, (258), 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) [2021-11-07 08:28:09,744 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 195 transitions. [2021-11-07 08:28:09,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2021-11-07 08:28:09,746 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:28:09,746 INFO L513 BasicCegarLoop]: trace histogram [19, 18, 18, 18, 18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:28:09,799 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f275f07d-780e-4f51-8688-e966b504fbd3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2021-11-07 08:28:09,974 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f275f07d-780e-4f51-8688-e966b504fbd3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:28:09,974 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting cstrncpyErr1REQUIRES_VIOLATION === [cstrncpyErr0REQUIRES_VIOLATION, cstrncpyErr1REQUIRES_VIOLATION, cstrncpyErr2REQUIRES_VIOLATION, cstrncpyErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-07 08:28:09,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:28:09,975 INFO L85 PathProgramCache]: Analyzing trace with hash -1493425095, now seen corresponding path program 29 times [2021-11-07 08:28:09,975 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:28:09,975 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931754021] [2021-11-07 08:28:09,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:28:09,975 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:28:10,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:28:14,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:28:14,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:28:14,268 INFO L134 CoverageAnalysis]: Checked inductivity of 1515 backedges. 70 proven. 1445 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:28:14,269 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:28:14,269 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931754021] [2021-11-07 08:28:14,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931754021] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:28:14,269 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646073187] [2021-11-07 08:28:14,269 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 08:28:14,269 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:28:14,269 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f275f07d-780e-4f51-8688-e966b504fbd3/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:28:14,270 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f275f07d-780e-4f51-8688-e966b504fbd3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:28:14,276 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f275f07d-780e-4f51-8688-e966b504fbd3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-11-07 08:31:34,170 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2021-11-07 08:31:34,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:31:34,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 897 conjuncts, 290 conjunts are in the unsatisfiable core [2021-11-07 08:31:34,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:31:34,382 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 [2021-11-07 08:31:36,095 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 [2021-11-07 08:31:36,676 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 28 treesize of output 27 [2021-11-07 08:31:36,846 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 21 treesize of output 20 [2021-11-07 08:31:36,973 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 21 treesize of output 20 [2021-11-07 08:31:37,099 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 21 treesize of output 20 [2021-11-07 08:31:37,230 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 21 treesize of output 20 [2021-11-07 08:31:37,356 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 21 treesize of output 20 [2021-11-07 08:31:37,507 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 21 treesize of output 20 [2021-11-07 08:31:37,668 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 21 treesize of output 20 [2021-11-07 08:31:37,820 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 21 treesize of output 20 [2021-11-07 08:31:37,994 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 21 treesize of output 20 [2021-11-07 08:31:38,154 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 21 treesize of output 20 [2021-11-07 08:31:38,286 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 21 treesize of output 20 [2021-11-07 08:31:38,415 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 21 treesize of output 20 [2021-11-07 08:31:38,544 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 21 treesize of output 20 [2021-11-07 08:31:38,673 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 21 treesize of output 20 [2021-11-07 08:31:38,798 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 21 treesize of output 20 [2021-11-07 08:31:38,918 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-07 08:31:38,918 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 [2021-11-07 08:31:38,935 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 [2021-11-07 08:31:38,948 INFO L134 CoverageAnalysis]: Checked inductivity of 1515 backedges. 70 proven. 1445 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:31:38,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [646073187] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:31:38,949 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:31:38,949 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 62] total 121 [2021-11-07 08:31:38,949 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736930802] [2021-11-07 08:31:38,950 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 121 states [2021-11-07 08:31:38,950 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:31:38,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 121 interpolants. [2021-11-07 08:31:38,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=335, Invalid=14185, Unknown=0, NotChecked=0, Total=14520 [2021-11-07 08:31:38,952 INFO L87 Difference]: Start difference. First operand 193 states and 195 transitions. Second operand has 121 states, 119 states have (on average 2.630252100840336) internal successors, (313), 118 states have internal predecessors, (313), 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) [2021-11-07 08:31:48,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:31:48,479 INFO L93 Difference]: Finished difference Result 310 states and 312 transitions. [2021-11-07 08:31:48,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-11-07 08:31:48,479 INFO L78 Accepts]: Start accepts. Automaton has has 121 states, 119 states have (on average 2.630252100840336) internal successors, (313), 118 states have internal predecessors, (313), 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 192 [2021-11-07 08:31:48,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:31:48,481 INFO L225 Difference]: With dead ends: 310 [2021-11-07 08:31:48,481 INFO L226 Difference]: Without dead ends: 200 [2021-11-07 08:31:48,483 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 152 SyntacticMatches, 1 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4906 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=611, Invalid=26121, Unknown=0, NotChecked=0, Total=26732 [2021-11-07 08:31:48,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-11-07 08:31:48,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 197. [2021-11-07 08:31:48,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 192 states have (on average 1.015625) internal successors, (195), 192 states have internal predecessors, (195), 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) [2021-11-07 08:31:48,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 199 transitions. [2021-11-07 08:31:48,487 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 199 transitions. Word has length 192 [2021-11-07 08:31:48,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:31:48,488 INFO L470 AbstractCegarLoop]: Abstraction has 197 states and 199 transitions. [2021-11-07 08:31:48,488 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 121 states, 119 states have (on average 2.630252100840336) internal successors, (313), 118 states have internal predecessors, (313), 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) [2021-11-07 08:31:48,488 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 199 transitions. [2021-11-07 08:31:48,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2021-11-07 08:31:48,490 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:31:48,490 INFO L513 BasicCegarLoop]: trace histogram [19, 18, 18, 18, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:31:48,536 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f275f07d-780e-4f51-8688-e966b504fbd3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-11-07 08:31:48,712 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f275f07d-780e-4f51-8688-e966b504fbd3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:31:48,712 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting cstrncpyErr1REQUIRES_VIOLATION === [cstrncpyErr0REQUIRES_VIOLATION, cstrncpyErr1REQUIRES_VIOLATION, cstrncpyErr2REQUIRES_VIOLATION, cstrncpyErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-07 08:31:48,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:31:48,712 INFO L85 PathProgramCache]: Analyzing trace with hash -825064042, now seen corresponding path program 30 times [2021-11-07 08:31:48,712 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:31:48,712 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524923435] [2021-11-07 08:31:48,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:31:48,713 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:31:48,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:31:50,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:31:50,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:31:50,124 INFO L134 CoverageAnalysis]: Checked inductivity of 1584 backedges. 496 proven. 1088 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:31:50,124 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:31:50,124 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524923435] [2021-11-07 08:31:50,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524923435] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:31:50,124 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194862090] [2021-11-07 08:31:50,124 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 08:31:50,124 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:31:50,124 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f275f07d-780e-4f51-8688-e966b504fbd3/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:31:50,125 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f275f07d-780e-4f51-8688-e966b504fbd3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:31:50,143 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f275f07d-780e-4f51-8688-e966b504fbd3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process