./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/openbsd_cstrlen-alloca-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce611dab-788c-4b81-a514-4d18396713a6/bin/uautomizer-YU5uOKAj3y/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce611dab-788c-4b81-a514-4d18396713a6/bin/uautomizer-YU5uOKAj3y/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce611dab-788c-4b81-a514-4d18396713a6/bin/uautomizer-YU5uOKAj3y/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce611dab-788c-4b81-a514-4d18396713a6/bin/uautomizer-YU5uOKAj3y/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/openbsd_cstrlen-alloca-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce611dab-788c-4b81-a514-4d18396713a6/bin/uautomizer-YU5uOKAj3y/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce611dab-788c-4b81-a514-4d18396713a6/bin/uautomizer-YU5uOKAj3y --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 dd76b7822e4f01d656aa547f942373edd42b5cbb2c90dd9f0d7299ee64d98734 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 17:49:29,256 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 17:49:29,259 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 17:49:29,317 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 17:49:29,317 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 17:49:29,322 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 17:49:29,325 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 17:49:29,329 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 17:49:29,331 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 17:49:29,337 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 17:49:29,338 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 17:49:29,341 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 17:49:29,342 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 17:49:29,345 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 17:49:29,347 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 17:49:29,353 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 17:49:29,355 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 17:49:29,357 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 17:49:29,359 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 17:49:29,370 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 17:49:29,372 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 17:49:29,374 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 17:49:29,378 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 17:49:29,379 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 17:49:29,388 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 17:49:29,389 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 17:49:29,389 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 17:49:29,391 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 17:49:29,392 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 17:49:29,396 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 17:49:29,397 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 17:49:29,398 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 17:49:29,400 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 17:49:29,401 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 17:49:29,403 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 17:49:29,404 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 17:49:29,405 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 17:49:29,405 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 17:49:29,406 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 17:49:29,407 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 17:49:29,407 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 17:49:29,409 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce611dab-788c-4b81-a514-4d18396713a6/bin/uautomizer-YU5uOKAj3y/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-11-13 17:49:29,456 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 17:49:29,456 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 17:49:29,457 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-13 17:49:29,457 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-13 17:49:29,465 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 17:49:29,465 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 17:49:29,466 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-13 17:49:29,466 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-13 17:49:29,467 INFO L138 SettingsManager]: * Use SBE=true [2021-11-13 17:49:29,467 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 17:49:29,468 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-13 17:49:29,469 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-13 17:49:29,469 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-13 17:49:29,469 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-13 17:49:29,469 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 17:49:29,469 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-13 17:49:29,470 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-13 17:49:29,470 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-13 17:49:29,470 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 17:49:29,470 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-13 17:49:29,471 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-13 17:49:29,471 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 17:49:29,471 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 17:49:29,471 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-13 17:49:29,472 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 17:49:29,472 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 17:49:29,472 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 17:49:29,472 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 17:49:29,473 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-13 17:49:29,474 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-13 17:49:29,474 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 17:49:29,475 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_ce611dab-788c-4b81-a514-4d18396713a6/bin/uautomizer-YU5uOKAj3y/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce611dab-788c-4b81-a514-4d18396713a6/bin/uautomizer-YU5uOKAj3y Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dd76b7822e4f01d656aa547f942373edd42b5cbb2c90dd9f0d7299ee64d98734 [2021-11-13 17:49:29,793 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 17:49:29,821 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 17:49:29,824 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 17:49:29,827 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 17:49:29,827 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 17:49:29,829 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce611dab-788c-4b81-a514-4d18396713a6/bin/uautomizer-YU5uOKAj3y/../../sv-benchmarks/c/array-memsafety/openbsd_cstrlen-alloca-1.i [2021-11-13 17:49:29,903 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce611dab-788c-4b81-a514-4d18396713a6/bin/uautomizer-YU5uOKAj3y/data/5cbb1c579/2c43aac3ed3040628ecf5afc17d3f710/FLAGbe7f10417 [2021-11-13 17:49:30,554 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 17:49:30,555 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce611dab-788c-4b81-a514-4d18396713a6/sv-benchmarks/c/array-memsafety/openbsd_cstrlen-alloca-1.i [2021-11-13 17:49:30,567 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce611dab-788c-4b81-a514-4d18396713a6/bin/uautomizer-YU5uOKAj3y/data/5cbb1c579/2c43aac3ed3040628ecf5afc17d3f710/FLAGbe7f10417 [2021-11-13 17:49:30,846 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce611dab-788c-4b81-a514-4d18396713a6/bin/uautomizer-YU5uOKAj3y/data/5cbb1c579/2c43aac3ed3040628ecf5afc17d3f710 [2021-11-13 17:49:30,849 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 17:49:30,851 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-11-13 17:49:30,854 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 17:49:30,855 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 17:49:30,859 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 17:49:30,860 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 05:49:30" (1/1) ... [2021-11-13 17:49:30,862 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4d272757 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:49:30, skipping insertion in model container [2021-11-13 17:49:30,863 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 05:49:30" (1/1) ... [2021-11-13 17:49:30,871 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 17:49:30,941 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 17:49:31,356 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 17:49:31,368 INFO L203 MainTranslator]: Completed pre-run [2021-11-13 17:49:31,426 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 17:49:31,455 INFO L208 MainTranslator]: Completed translation [2021-11-13 17:49:31,456 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:49:31 WrapperNode [2021-11-13 17:49:31,456 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 17:49:31,457 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-13 17:49:31,458 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-13 17:49:31,458 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-13 17:49:31,469 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:49:31" (1/1) ... [2021-11-13 17:49:31,470 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:49:31" (1/1) ... [2021-11-13 17:49:31,483 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:49:31" (1/1) ... [2021-11-13 17:49:31,483 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:49:31" (1/1) ... [2021-11-13 17:49:31,496 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:49:31" (1/1) ... [2021-11-13 17:49:31,512 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:49:31" (1/1) ... [2021-11-13 17:49:31,516 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:49:31" (1/1) ... [2021-11-13 17:49:31,522 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-13 17:49:31,523 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-13 17:49:31,523 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-13 17:49:31,523 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-13 17:49:31,540 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:49:31" (1/1) ... [2021-11-13 17:49:31,548 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 17:49:31,562 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce611dab-788c-4b81-a514-4d18396713a6/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:49:31,574 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce611dab-788c-4b81-a514-4d18396713a6/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-13 17:49:31,582 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce611dab-788c-4b81-a514-4d18396713a6/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-13 17:49:31,617 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-11-13 17:49:31,617 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-13 17:49:31,617 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-11-13 17:49:31,618 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-11-13 17:49:31,618 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2021-11-13 17:49:31,618 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2021-11-13 17:49:31,618 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2021-11-13 17:49:31,618 INFO L138 BoogieDeclarations]: Found implementation of procedure cstrlen [2021-11-13 17:49:31,619 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-11-13 17:49:31,619 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-11-13 17:49:31,619 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-11-13 17:49:31,619 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-11-13 17:49:31,619 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-11-13 17:49:31,620 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-11-13 17:49:31,620 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-11-13 17:49:31,620 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-11-13 17:49:31,620 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-11-13 17:49:31,620 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-11-13 17:49:31,620 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-11-13 17:49:31,621 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-11-13 17:49:31,621 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-11-13 17:49:31,621 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-11-13 17:49:31,621 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-11-13 17:49:31,621 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-11-13 17:49:31,622 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-11-13 17:49:31,622 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-11-13 17:49:31,622 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-11-13 17:49:31,622 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2021-11-13 17:49:31,622 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2021-11-13 17:49:31,622 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2021-11-13 17:49:31,623 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-11-13 17:49:31,623 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-11-13 17:49:31,623 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-11-13 17:49:31,623 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-11-13 17:49:31,623 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-11-13 17:49:31,623 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-11-13 17:49:31,624 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-11-13 17:49:31,624 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-11-13 17:49:31,624 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-11-13 17:49:31,624 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-11-13 17:49:31,624 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-11-13 17:49:31,624 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-11-13 17:49:31,625 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-11-13 17:49:31,625 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-11-13 17:49:31,625 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-11-13 17:49:31,625 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-11-13 17:49:31,625 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-11-13 17:49:31,625 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-11-13 17:49:31,626 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-11-13 17:49:31,626 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-11-13 17:49:31,626 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-11-13 17:49:31,626 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-11-13 17:49:31,626 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-11-13 17:49:31,627 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-11-13 17:49:31,627 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-11-13 17:49:31,627 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-11-13 17:49:31,627 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-11-13 17:49:31,627 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-11-13 17:49:31,627 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-11-13 17:49:31,628 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-11-13 17:49:31,628 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-11-13 17:49:31,628 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-11-13 17:49:31,628 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-11-13 17:49:31,628 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-11-13 17:49:31,628 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-11-13 17:49:31,629 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-11-13 17:49:31,629 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-11-13 17:49:31,629 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-11-13 17:49:31,629 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-11-13 17:49:31,629 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-11-13 17:49:31,629 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-11-13 17:49:31,630 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-11-13 17:49:31,630 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-11-13 17:49:31,630 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-11-13 17:49:31,630 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-11-13 17:49:31,630 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-11-13 17:49:31,631 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-11-13 17:49:31,631 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-11-13 17:49:31,631 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-11-13 17:49:31,631 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-11-13 17:49:31,631 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-11-13 17:49:31,631 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-11-13 17:49:31,632 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-11-13 17:49:31,632 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-11-13 17:49:31,632 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-11-13 17:49:31,632 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-11-13 17:49:31,632 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-11-13 17:49:31,632 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-11-13 17:49:31,633 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-11-13 17:49:31,633 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-11-13 17:49:31,633 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-11-13 17:49:31,633 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-11-13 17:49:31,633 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-11-13 17:49:31,633 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-11-13 17:49:31,633 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-11-13 17:49:31,634 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-11-13 17:49:31,634 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-11-13 17:49:31,634 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-11-13 17:49:31,634 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-11-13 17:49:31,634 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-11-13 17:49:31,634 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-11-13 17:49:31,635 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-11-13 17:49:31,635 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-11-13 17:49:31,635 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-11-13 17:49:31,635 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-11-13 17:49:31,635 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-11-13 17:49:31,635 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-11-13 17:49:31,636 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-11-13 17:49:31,636 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-11-13 17:49:31,636 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-11-13 17:49:31,636 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-11-13 17:49:31,636 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-11-13 17:49:31,636 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-11-13 17:49:31,637 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-11-13 17:49:31,637 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-11-13 17:49:31,637 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-11-13 17:49:31,637 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-11-13 17:49:31,637 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2021-11-13 17:49:31,637 INFO L130 BoogieDeclarations]: Found specification of procedure cstrlen [2021-11-13 17:49:31,638 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-13 17:49:31,638 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-11-13 17:49:31,638 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-13 17:49:31,638 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-13 17:49:31,638 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-13 17:49:31,638 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-11-13 17:49:31,639 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-13 17:49:32,158 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-13 17:49:32,159 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-13 17:49:32,165 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 05:49:32 BoogieIcfgContainer [2021-11-13 17:49:32,165 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-13 17:49:32,167 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-13 17:49:32,168 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-13 17:49:32,173 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-13 17:49:32,174 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 05:49:30" (1/3) ... [2021-11-13 17:49:32,175 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4aae8f68 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 05:49:32, skipping insertion in model container [2021-11-13 17:49:32,175 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:49:31" (2/3) ... [2021-11-13 17:49:32,176 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4aae8f68 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 05:49:32, skipping insertion in model container [2021-11-13 17:49:32,177 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 05:49:32" (3/3) ... [2021-11-13 17:49:32,178 INFO L111 eAbstractionObserver]: Analyzing ICFG openbsd_cstrlen-alloca-1.i [2021-11-13 17:49:32,186 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-13 17:49:32,186 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 7 error locations. [2021-11-13 17:49:32,256 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-13 17:49:32,269 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 [2021-11-13 17:49:32,269 INFO L340 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2021-11-13 17:49:32,292 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 19 states have (on average 1.631578947368421) internal successors, (31), 26 states have internal predecessors, (31), 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) [2021-11-13 17:49:32,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-13 17:49:32,314 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:49:32,314 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:49:32,315 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr2REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 2 more)] === [2021-11-13 17:49:32,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:49:32,322 INFO L85 PathProgramCache]: Analyzing trace with hash -2095006156, now seen corresponding path program 1 times [2021-11-13 17:49:32,332 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:49:32,333 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713472675] [2021-11-13 17:49:32,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:49:32,335 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:49:32,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:32,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 17:49:32,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:32,653 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:49:32,654 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:49:32,654 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713472675] [2021-11-13 17:49:32,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713472675] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:49:32,656 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:49:32,657 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 17:49:32,659 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416428372] [2021-11-13 17:49:32,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:49:32,665 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 17:49:32,665 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:49:32,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 17:49:32,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 17:49:32,723 INFO L87 Difference]: Start difference. First operand has 33 states, 19 states have (on average 1.631578947368421) internal successors, (31), 26 states have internal predecessors, (31), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-13 17:49:32,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:49:32,853 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2021-11-13 17:49:32,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 17:49:32,859 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2021-11-13 17:49:32,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:49:32,868 INFO L225 Difference]: With dead ends: 31 [2021-11-13 17:49:32,869 INFO L226 Difference]: Without dead ends: 28 [2021-11-13 17:49:32,871 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 17:49:32,875 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 19 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 77.25ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.01ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 93.75ms IncrementalHoareTripleChecker+Time [2021-11-13 17:49:32,876 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 31 Invalid, 46 Unknown, 0 Unchecked, 8.01ms Time], IncrementalHoareTripleChecker [4 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 93.75ms Time] [2021-11-13 17:49:32,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-11-13 17:49:32,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-11-13 17:49:32,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 22 states have internal predecessors, (25), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-13 17:49:32,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2021-11-13 17:49:32,919 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 10 [2021-11-13 17:49:32,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:49:32,920 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2021-11-13 17:49:32,920 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-13 17:49:32,920 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2021-11-13 17:49:32,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-13 17:49:32,922 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:49:32,922 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:49:32,922 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-13 17:49:32,923 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 2 more)] === [2021-11-13 17:49:32,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:49:32,929 INFO L85 PathProgramCache]: Analyzing trace with hash -2095006155, now seen corresponding path program 1 times [2021-11-13 17:49:32,929 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:49:32,930 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697470361] [2021-11-13 17:49:32,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:49:32,930 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:49:32,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:33,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 17:49:33,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:33,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:49:33,085 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:49:33,086 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697470361] [2021-11-13 17:49:33,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697470361] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:49:33,086 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:49:33,086 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 17:49:33,086 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325570740] [2021-11-13 17:49:33,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:49:33,088 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 17:49:33,088 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:49:33,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 17:49:33,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-13 17:49:33,089 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-13 17:49:33,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:49:33,158 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2021-11-13 17:49:33,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 17:49:33,158 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2021-11-13 17:49:33,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:49:33,159 INFO L225 Difference]: With dead ends: 27 [2021-11-13 17:49:33,160 INFO L226 Difference]: Without dead ends: 27 [2021-11-13 17:49:33,160 INFO L932 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 [2021-11-13 17:49:33,162 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 29 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 39.99ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.08ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 48.35ms IncrementalHoareTripleChecker+Time [2021-11-13 17:49:33,163 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 27 Invalid, 39 Unknown, 0 Unchecked, 2.08ms Time], IncrementalHoareTripleChecker [5 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 48.35ms Time] [2021-11-13 17:49:33,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-11-13 17:49:33,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-11-13 17:49:33,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 21 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-13 17:49:33,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2021-11-13 17:49:33,169 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 10 [2021-11-13 17:49:33,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:49:33,169 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2021-11-13 17:49:33,169 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-13 17:49:33,169 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2021-11-13 17:49:33,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-13 17:49:33,170 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:49:33,170 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:49:33,170 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-13 17:49:33,171 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 2 more)] === [2021-11-13 17:49:33,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:49:33,171 INFO L85 PathProgramCache]: Analyzing trace with hash -2095006102, now seen corresponding path program 1 times [2021-11-13 17:49:33,172 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:49:33,172 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051835806] [2021-11-13 17:49:33,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:49:33,172 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:49:33,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:33,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 17:49:33,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:33,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:49:33,269 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:49:33,269 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051835806] [2021-11-13 17:49:33,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051835806] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:49:33,270 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:49:33,270 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-13 17:49:33,270 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454087655] [2021-11-13 17:49:33,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:49:33,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 17:49:33,271 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:49:33,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 17:49:33,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-13 17:49:33,272 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-13 17:49:33,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:49:33,376 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2021-11-13 17:49:33,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 17:49:33,382 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2021-11-13 17:49:33,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:49:33,384 INFO L225 Difference]: With dead ends: 34 [2021-11-13 17:49:33,385 INFO L226 Difference]: Without dead ends: 34 [2021-11-13 17:49:33,385 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-13 17:49:33,387 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 20 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 53.14ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.58ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 76.06ms IncrementalHoareTripleChecker+Time [2021-11-13 17:49:33,387 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 38 Invalid, 41 Unknown, 0 Unchecked, 4.58ms Time], IncrementalHoareTripleChecker [5 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 76.06ms Time] [2021-11-13 17:49:33,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-11-13 17:49:33,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 29. [2021-11-13 17:49:33,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 20 states have (on average 1.3) internal successors, (26), 23 states have internal predecessors, (26), 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) [2021-11-13 17:49:33,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2021-11-13 17:49:33,402 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 10 [2021-11-13 17:49:33,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:49:33,403 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2021-11-13 17:49:33,403 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-13 17:49:33,403 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2021-11-13 17:49:33,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-13 17:49:33,404 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:49:33,405 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:49:33,405 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-13 17:49:33,405 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 2 more)] === [2021-11-13 17:49:33,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:49:33,406 INFO L85 PathProgramCache]: Analyzing trace with hash -2094946520, now seen corresponding path program 1 times [2021-11-13 17:49:33,407 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:49:33,407 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130566313] [2021-11-13 17:49:33,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:49:33,408 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:49:33,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:33,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 17:49:33,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:33,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:49:33,566 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:49:33,566 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130566313] [2021-11-13 17:49:33,567 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130566313] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:49:33,567 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:49:33,567 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-13 17:49:33,567 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676902170] [2021-11-13 17:49:33,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:49:33,568 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 17:49:33,568 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:49:33,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 17:49:33,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-13 17:49:33,569 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand has 6 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-13 17:49:33,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:49:33,679 INFO L93 Difference]: Finished difference Result 38 states and 41 transitions. [2021-11-13 17:49:33,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 17:49:33,680 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2021-11-13 17:49:33,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:49:33,681 INFO L225 Difference]: With dead ends: 38 [2021-11-13 17:49:33,681 INFO L226 Difference]: Without dead ends: 38 [2021-11-13 17:49:33,682 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-13 17:49:33,683 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 35 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 69.63ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.58ms SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 86.00ms IncrementalHoareTripleChecker+Time [2021-11-13 17:49:33,684 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 39 Invalid, 70 Unknown, 0 Unchecked, 2.58ms Time], IncrementalHoareTripleChecker [8 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 86.00ms Time] [2021-11-13 17:49:33,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-11-13 17:49:33,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 31. [2021-11-13 17:49:33,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 25 states have internal predecessors, (29), 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) [2021-11-13 17:49:33,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2021-11-13 17:49:33,691 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 10 [2021-11-13 17:49:33,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:49:33,691 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2021-11-13 17:49:33,692 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-13 17:49:33,692 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2021-11-13 17:49:33,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-13 17:49:33,693 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:49:33,693 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:49:33,693 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-13 17:49:33,693 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting cstrlenErr0REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 2 more)] === [2021-11-13 17:49:33,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:49:33,694 INFO L85 PathProgramCache]: Analyzing trace with hash 2136386996, now seen corresponding path program 1 times [2021-11-13 17:49:33,694 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:49:33,695 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593795227] [2021-11-13 17:49:33,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:49:33,695 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:49:33,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:33,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 17:49:33,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:33,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:49:33,792 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:49:33,792 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593795227] [2021-11-13 17:49:33,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593795227] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:49:33,793 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:49:33,793 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-13 17:49:33,793 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503858956] [2021-11-13 17:49:33,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:49:33,794 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 17:49:33,794 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:49:33,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 17:49:33,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-13 17:49:33,795 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand has 6 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-13 17:49:33,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:49:33,905 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2021-11-13 17:49:33,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 17:49:33,906 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2021-11-13 17:49:33,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:49:33,909 INFO L225 Difference]: With dead ends: 30 [2021-11-13 17:49:33,909 INFO L226 Difference]: Without dead ends: 30 [2021-11-13 17:49:33,910 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-13 17:49:33,919 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 29 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 54.09ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.01ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 68.18ms IncrementalHoareTripleChecker+Time [2021-11-13 17:49:33,919 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 39 Invalid, 67 Unknown, 0 Unchecked, 4.01ms Time], IncrementalHoareTripleChecker [6 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 68.18ms Time] [2021-11-13 17:49:33,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-11-13 17:49:33,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-11-13 17:49:33,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 24 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-13 17:49:33,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2021-11-13 17:49:33,925 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 13 [2021-11-13 17:49:33,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:49:33,925 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2021-11-13 17:49:33,925 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-13 17:49:33,925 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2021-11-13 17:49:33,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-13 17:49:33,926 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:49:33,926 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:49:33,926 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-13 17:49:33,927 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting cstrlenErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 2 more)] === [2021-11-13 17:49:33,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:49:33,927 INFO L85 PathProgramCache]: Analyzing trace with hash 2136386997, now seen corresponding path program 1 times [2021-11-13 17:49:33,927 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:49:33,928 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825964546] [2021-11-13 17:49:33,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:49:33,928 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:49:33,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:34,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 17:49:34,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:34,078 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:49:34,078 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:49:34,078 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825964546] [2021-11-13 17:49:34,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825964546] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:49:34,079 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:49:34,079 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-13 17:49:34,079 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611332866] [2021-11-13 17:49:34,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:49:34,080 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-13 17:49:34,080 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:49:34,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-13 17:49:34,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-13 17:49:34,081 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 8 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-13 17:49:34,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:49:34,207 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2021-11-13 17:49:34,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 17:49:34,208 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2021-11-13 17:49:34,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:49:34,210 INFO L225 Difference]: With dead ends: 36 [2021-11-13 17:49:34,210 INFO L226 Difference]: Without dead ends: 36 [2021-11-13 17:49:34,211 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-11-13 17:49:34,212 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 52 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 65.81ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.23ms SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 78.91ms IncrementalHoareTripleChecker+Time [2021-11-13 17:49:34,213 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 42 Invalid, 89 Unknown, 0 Unchecked, 2.23ms Time], IncrementalHoareTripleChecker [9 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 78.91ms Time] [2021-11-13 17:49:34,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-11-13 17:49:34,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 31. [2021-11-13 17:49:34,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 25 states have internal predecessors, (29), 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) [2021-11-13 17:49:34,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2021-11-13 17:49:34,219 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 13 [2021-11-13 17:49:34,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:49:34,219 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2021-11-13 17:49:34,220 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-13 17:49:34,220 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2021-11-13 17:49:34,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-13 17:49:34,221 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:49:34,221 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:49:34,221 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-13 17:49:34,222 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 2 more)] === [2021-11-13 17:49:34,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:49:34,222 INFO L85 PathProgramCache]: Analyzing trace with hash 1041914347, now seen corresponding path program 1 times [2021-11-13 17:49:34,222 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:49:34,223 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708923169] [2021-11-13 17:49:34,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:49:34,223 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:49:34,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:34,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 17:49:34,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:34,352 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:49:34,352 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:49:34,352 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708923169] [2021-11-13 17:49:34,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708923169] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 17:49:34,353 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89962993] [2021-11-13 17:49:34,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:49:34,353 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:49:34,353 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce611dab-788c-4b81-a514-4d18396713a6/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:49:34,357 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce611dab-788c-4b81-a514-4d18396713a6/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:49:34,383 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce611dab-788c-4b81-a514-4d18396713a6/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-13 17:49:34,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:34,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-13 17:49:34,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:49:34,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-13 17:49:34,794 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:49:34,794 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 17:49:35,099 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:49:35,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [89962993] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 17:49:35,100 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 17:49:35,100 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 9 [2021-11-13 17:49:35,101 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97468167] [2021-11-13 17:49:35,101 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 17:49:35,101 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-13 17:49:35,102 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:49:35,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-13 17:49:35,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-13 17:49:35,103 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-13 17:49:35,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:49:35,292 INFO L93 Difference]: Finished difference Result 43 states and 47 transitions. [2021-11-13 17:49:35,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-13 17:49:35,294 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2021-11-13 17:49:35,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:49:35,295 INFO L225 Difference]: With dead ends: 43 [2021-11-13 17:49:35,295 INFO L226 Difference]: Without dead ends: 43 [2021-11-13 17:49:35,295 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-11-13 17:49:35,296 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 49 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 105.96ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.73ms SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 128.69ms IncrementalHoareTripleChecker+Time [2021-11-13 17:49:35,296 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 57 Invalid, 155 Unknown, 0 Unchecked, 2.73ms Time], IncrementalHoareTripleChecker [18 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 128.69ms Time] [2021-11-13 17:49:35,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-11-13 17:49:35,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 28. [2021-11-13 17:49:35,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 22 states have internal predecessors, (25), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-13 17:49:35,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2021-11-13 17:49:35,301 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 14 [2021-11-13 17:49:35,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:49:35,302 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2021-11-13 17:49:35,302 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-13 17:49:35,302 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2021-11-13 17:49:35,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-13 17:49:35,303 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:49:35,303 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:49:35,343 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce611dab-788c-4b81-a514-4d18396713a6/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-13 17:49:35,504 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce611dab-788c-4b81-a514-4d18396713a6/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:49:35,504 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting cstrlenErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 2 more)] === [2021-11-13 17:49:35,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:49:35,504 INFO L85 PathProgramCache]: Analyzing trace with hash -2015340679, now seen corresponding path program 1 times [2021-11-13 17:49:35,505 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:49:35,505 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130409314] [2021-11-13 17:49:35,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:49:35,505 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:49:35,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:35,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 17:49:35,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:35,630 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:49:35,631 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:49:35,631 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130409314] [2021-11-13 17:49:35,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130409314] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:49:35,631 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:49:35,631 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-13 17:49:35,632 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732303878] [2021-11-13 17:49:35,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:49:35,632 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-13 17:49:35,632 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:49:35,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-13 17:49:35,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-11-13 17:49:35,633 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand has 9 states, 8 states have (on average 1.5) internal successors, (12), 7 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) [2021-11-13 17:49:35,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:49:35,785 INFO L93 Difference]: Finished difference Result 39 states and 40 transitions. [2021-11-13 17:49:35,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-13 17:49:35,786 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.5) internal successors, (12), 7 states have internal predecessors, (12), 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 [2021-11-13 17:49:35,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:49:35,789 INFO L225 Difference]: With dead ends: 39 [2021-11-13 17:49:35,789 INFO L226 Difference]: Without dead ends: 39 [2021-11-13 17:49:35,790 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-11-13 17:49:35,791 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 31 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 69.04ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.98ms SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 89.63ms IncrementalHoareTripleChecker+Time [2021-11-13 17:49:35,792 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 74 Invalid, 116 Unknown, 0 Unchecked, 1.98ms Time], IncrementalHoareTripleChecker [10 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 89.63ms Time] [2021-11-13 17:49:35,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-11-13 17:49:35,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 36. [2021-11-13 17:49:35,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 29 states have internal predecessors, (31), 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) [2021-11-13 17:49:35,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2021-11-13 17:49:35,810 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 16 [2021-11-13 17:49:35,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:49:35,810 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2021-11-13 17:49:35,810 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.5) internal successors, (12), 7 states have internal predecessors, (12), 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) [2021-11-13 17:49:35,810 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2021-11-13 17:49:35,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-13 17:49:35,811 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:49:35,811 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:49:35,811 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-13 17:49:35,811 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting cstrlenErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 2 more)] === [2021-11-13 17:49:35,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:49:35,812 INFO L85 PathProgramCache]: Analyzing trace with hash 1886599607, now seen corresponding path program 1 times [2021-11-13 17:49:35,812 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:49:35,812 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423500217] [2021-11-13 17:49:35,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:49:35,813 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:49:35,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:36,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 17:49:36,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:36,046 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:49:36,046 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:49:36,047 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423500217] [2021-11-13 17:49:36,047 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423500217] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:49:36,047 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:49:36,047 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-13 17:49:36,047 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121688277] [2021-11-13 17:49:36,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:49:36,048 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-13 17:49:36,048 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:49:36,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-13 17:49:36,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-11-13 17:49:36,049 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand has 10 states, 9 states have (on average 1.3333333333333333) 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) [2021-11-13 17:49:36,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:49:36,229 INFO L93 Difference]: Finished difference Result 51 states and 53 transitions. [2021-11-13 17:49:36,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-13 17:49:36,230 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 8 states have internal predecessors, (12), 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 [2021-11-13 17:49:36,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:49:36,231 INFO L225 Difference]: With dead ends: 51 [2021-11-13 17:49:36,231 INFO L226 Difference]: Without dead ends: 51 [2021-11-13 17:49:36,231 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-11-13 17:49:36,232 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 49 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 90.45ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.04ms SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 107.96ms IncrementalHoareTripleChecker+Time [2021-11-13 17:49:36,232 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 60 Invalid, 136 Unknown, 0 Unchecked, 2.04ms Time], IncrementalHoareTripleChecker [13 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 107.96ms Time] [2021-11-13 17:49:36,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-11-13 17:49:36,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 37. [2021-11-13 17:49:36,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 30 states have internal predecessors, (33), 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) [2021-11-13 17:49:36,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 40 transitions. [2021-11-13 17:49:36,236 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 40 transitions. Word has length 16 [2021-11-13 17:49:36,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:49:36,239 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 40 transitions. [2021-11-13 17:49:36,239 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 8 states have internal predecessors, (12), 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) [2021-11-13 17:49:36,240 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 40 transitions. [2021-11-13 17:49:36,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-13 17:49:36,240 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:49:36,241 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:49:36,241 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-13 17:49:36,241 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr4ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 2 more)] === [2021-11-13 17:49:36,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:49:36,242 INFO L85 PathProgramCache]: Analyzing trace with hash 280521542, now seen corresponding path program 1 times [2021-11-13 17:49:36,242 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:49:36,242 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591257522] [2021-11-13 17:49:36,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:49:36,243 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:49:36,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:36,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 17:49:36,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:36,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-11-13 17:49:36,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:36,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:49:36,364 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:49:36,365 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591257522] [2021-11-13 17:49:36,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591257522] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:49:36,365 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:49:36,365 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 17:49:36,365 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931426208] [2021-11-13 17:49:36,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:49:36,366 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 17:49:36,366 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:49:36,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 17:49:36,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-13 17:49:36,367 INFO L87 Difference]: Start difference. First operand 37 states and 40 transitions. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-13 17:49:36,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:49:36,402 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2021-11-13 17:49:36,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 17:49:36,402 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 19 [2021-11-13 17:49:36,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:49:36,403 INFO L225 Difference]: With dead ends: 36 [2021-11-13 17:49:36,403 INFO L226 Difference]: Without dead ends: 21 [2021-11-13 17:49:36,404 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-13 17:49:36,404 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 15 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 26.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.66ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 31.67ms IncrementalHoareTripleChecker+Time [2021-11-13 17:49:36,405 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 29 Invalid, 41 Unknown, 0 Unchecked, 0.66ms Time], IncrementalHoareTripleChecker [4 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 31.67ms Time] [2021-11-13 17:49:36,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-11-13 17:49:36,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2021-11-13 17:49:36,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.125) internal successors, (18), 16 states have internal predecessors, (18), 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) [2021-11-13 17:49:36,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2021-11-13 17:49:36,408 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2021-11-13 17:49:36,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:49:36,408 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2021-11-13 17:49:36,408 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-13 17:49:36,408 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2021-11-13 17:49:36,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-13 17:49:36,409 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:49:36,409 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:49:36,409 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-13 17:49:36,410 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting cstrlenErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 2 more)] === [2021-11-13 17:49:36,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:49:36,410 INFO L85 PathProgramCache]: Analyzing trace with hash 1912442426, now seen corresponding path program 1 times [2021-11-13 17:49:36,410 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:49:36,411 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491153276] [2021-11-13 17:49:36,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:49:36,411 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:49:36,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:36,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 17:49:36,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:36,544 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:49:36,545 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:49:36,545 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491153276] [2021-11-13 17:49:36,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491153276] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 17:49:36,547 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639005733] [2021-11-13 17:49:36,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:49:36,548 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:49:36,548 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce611dab-788c-4b81-a514-4d18396713a6/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:49:36,553 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce611dab-788c-4b81-a514-4d18396713a6/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:49:36,557 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce611dab-788c-4b81-a514-4d18396713a6/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-13 17:49:36,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:36,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-13 17:49:36,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:49:36,817 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:49:36,817 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 17:49:36,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-13 17:49:37,014 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:49:37,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [639005733] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 17:49:37,015 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 17:49:37,015 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 20 [2021-11-13 17:49:37,015 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840351113] [2021-11-13 17:49:37,015 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 17:49:37,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-13 17:49:37,016 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:49:37,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-13 17:49:37,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-11-13 17:49:37,017 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand has 21 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-13 17:49:37,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:49:37,204 INFO L93 Difference]: Finished difference Result 29 states and 30 transitions. [2021-11-13 17:49:37,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-13 17:49:37,205 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2021-11-13 17:49:37,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:49:37,206 INFO L225 Difference]: With dead ends: 29 [2021-11-13 17:49:37,206 INFO L226 Difference]: Without dead ends: 29 [2021-11-13 17:49:37,206 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=117, Invalid=533, Unknown=0, NotChecked=0, Total=650 [2021-11-13 17:49:37,207 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 69 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 71.09ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.84ms SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 85.05ms IncrementalHoareTripleChecker+Time [2021-11-13 17:49:37,207 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 46 Invalid, 146 Unknown, 0 Unchecked, 1.84ms Time], IncrementalHoareTripleChecker [27 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 85.05ms Time] [2021-11-13 17:49:37,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-11-13 17:49:37,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 24. [2021-11-13 17:49:37,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.105263157894737) internal successors, (21), 19 states have internal predecessors, (21), 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) [2021-11-13 17:49:37,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2021-11-13 17:49:37,210 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 20 [2021-11-13 17:49:37,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:49:37,210 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2021-11-13 17:49:37,210 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-13 17:49:37,211 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2021-11-13 17:49:37,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-13 17:49:37,211 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:49:37,211 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:49:37,256 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce611dab-788c-4b81-a514-4d18396713a6/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-13 17:49:37,412 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce611dab-788c-4b81-a514-4d18396713a6/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-13 17:49:37,412 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting cstrlenErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 2 more)] === [2021-11-13 17:49:37,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:49:37,412 INFO L85 PathProgramCache]: Analyzing trace with hash 831122644, now seen corresponding path program 2 times [2021-11-13 17:49:37,413 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:49:37,413 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550540613] [2021-11-13 17:49:37,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:49:37,413 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:49:37,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:37,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 17:49:37,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:37,625 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:49:37,626 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:49:37,626 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550540613] [2021-11-13 17:49:37,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550540613] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 17:49:37,626 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296403171] [2021-11-13 17:49:37,627 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 17:49:37,627 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:49:37,627 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce611dab-788c-4b81-a514-4d18396713a6/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:49:37,628 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce611dab-788c-4b81-a514-4d18396713a6/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:49:37,653 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce611dab-788c-4b81-a514-4d18396713a6/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-13 17:49:37,736 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 17:49:37,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 17:49:37,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-13 17:49:37,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:49:37,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-11-13 17:49:38,264 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 17:49:38,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 33 [2021-11-13 17:49:38,414 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:49:38,414 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 17:49:38,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 34 [2021-11-13 17:49:38,851 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 46 treesize of output 42 [2021-11-13 17:49:38,858 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 38 treesize of output 30 [2021-11-13 17:49:38,910 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:49:38,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [296403171] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 17:49:38,911 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 17:49:38,911 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 30 [2021-11-13 17:49:38,911 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460569855] [2021-11-13 17:49:38,912 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 17:49:38,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-13 17:49:38,912 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:49:38,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-13 17:49:38,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=776, Unknown=0, NotChecked=0, Total=870 [2021-11-13 17:49:38,914 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand has 30 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 26 states have internal predecessors, (44), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-13 17:49:39,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:49:39,439 INFO L93 Difference]: Finished difference Result 44 states and 45 transitions. [2021-11-13 17:49:39,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-13 17:49:39,440 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 26 states have internal predecessors, (44), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2021-11-13 17:49:39,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:49:39,441 INFO L225 Difference]: With dead ends: 44 [2021-11-13 17:49:39,441 INFO L226 Difference]: Without dead ends: 36 [2021-11-13 17:49:39,442 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=182, Invalid=1540, Unknown=0, NotChecked=0, Total=1722 [2021-11-13 17:49:39,442 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 42 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 99.53ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.56ms SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 93 IncrementalHoareTripleChecker+Unchecked, 120.82ms IncrementalHoareTripleChecker+Time [2021-11-13 17:49:39,443 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 99 Invalid, 295 Unknown, 0 Unchecked, 2.56ms Time], IncrementalHoareTripleChecker [12 Valid, 190 Invalid, 0 Unknown, 93 Unchecked, 120.82ms Time] [2021-11-13 17:49:39,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-11-13 17:49:39,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 31. [2021-11-13 17:49:39,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.0769230769230769) internal successors, (28), 26 states have internal predecessors, (28), 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) [2021-11-13 17:49:39,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2021-11-13 17:49:39,446 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 23 [2021-11-13 17:49:39,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:49:39,446 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2021-11-13 17:49:39,446 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 26 states have internal predecessors, (44), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-13 17:49:39,447 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2021-11-13 17:49:39,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-13 17:49:39,447 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:49:39,447 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:49:39,477 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce611dab-788c-4b81-a514-4d18396713a6/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-13 17:49:39,648 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce611dab-788c-4b81-a514-4d18396713a6/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-13 17:49:39,648 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting cstrlenErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 2 more)] === [2021-11-13 17:49:39,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:49:39,649 INFO L85 PathProgramCache]: Analyzing trace with hash 976723133, now seen corresponding path program 3 times [2021-11-13 17:49:39,649 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:49:39,649 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247220338] [2021-11-13 17:49:39,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:49:39,649 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:49:39,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:39,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 17:49:39,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:39,852 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:49:39,853 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:49:39,853 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247220338] [2021-11-13 17:49:39,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247220338] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 17:49:39,853 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392022488] [2021-11-13 17:49:39,853 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-13 17:49:39,853 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:49:39,854 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce611dab-788c-4b81-a514-4d18396713a6/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:49:39,855 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce611dab-788c-4b81-a514-4d18396713a6/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:49:39,877 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce611dab-788c-4b81-a514-4d18396713a6/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-13 17:49:39,970 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-13 17:49:39,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 17:49:39,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-13 17:49:39,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:49:40,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-13 17:49:40,317 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 [2021-11-13 17:49:40,324 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:49:40,324 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 17:49:40,434 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 13 [2021-11-13 17:49:40,436 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 26 treesize of output 22 [2021-11-13 17:49:40,618 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:49:40,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [392022488] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 17:49:40,619 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 17:49:40,619 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 27 [2021-11-13 17:49:40,622 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36564501] [2021-11-13 17:49:40,622 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 17:49:40,623 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-13 17:49:40,623 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:49:40,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-13 17:49:40,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=620, Unknown=0, NotChecked=0, Total=702 [2021-11-13 17:49:40,624 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand has 27 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-13 17:49:40,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:49:40,986 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2021-11-13 17:49:40,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-13 17:49:40,987 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2021-11-13 17:49:40,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:49:40,988 INFO L225 Difference]: With dead ends: 49 [2021-11-13 17:49:40,988 INFO L226 Difference]: Without dead ends: 38 [2021-11-13 17:49:40,989 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 46 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=159, Invalid=1101, Unknown=0, NotChecked=0, Total=1260 [2021-11-13 17:49:40,990 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 34 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 328 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 135.12ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.06ms SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 20 IncrementalHoareTripleChecker+Unchecked, 168.66ms IncrementalHoareTripleChecker+Time [2021-11-13 17:49:40,990 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 115 Invalid, 359 Unknown, 0 Unchecked, 4.06ms Time], IncrementalHoareTripleChecker [11 Valid, 328 Invalid, 0 Unknown, 20 Unchecked, 168.66ms Time] [2021-11-13 17:49:40,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-11-13 17:49:40,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 35. [2021-11-13 17:49:40,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 30 states have (on average 1.0666666666666667) internal successors, (32), 30 states have internal predecessors, (32), 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) [2021-11-13 17:49:40,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2021-11-13 17:49:40,994 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 30 [2021-11-13 17:49:40,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:49:40,994 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2021-11-13 17:49:40,994 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-13 17:49:40,995 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2021-11-13 17:49:40,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-13 17:49:40,996 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:49:40,996 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:49:41,034 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce611dab-788c-4b81-a514-4d18396713a6/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-13 17:49:41,221 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce611dab-788c-4b81-a514-4d18396713a6/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:49:41,221 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting cstrlenErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 2 more)] === [2021-11-13 17:49:41,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:49:41,221 INFO L85 PathProgramCache]: Analyzing trace with hash -1134145536, now seen corresponding path program 4 times [2021-11-13 17:49:41,222 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:49:41,222 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283713780] [2021-11-13 17:49:41,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:49:41,222 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:49:41,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:41,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 17:49:41,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:41,411 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 1 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:49:41,411 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:49:41,411 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283713780] [2021-11-13 17:49:41,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283713780] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 17:49:41,412 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539362009] [2021-11-13 17:49:41,412 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-13 17:49:41,412 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:49:41,412 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce611dab-788c-4b81-a514-4d18396713a6/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:49:41,417 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce611dab-788c-4b81-a514-4d18396713a6/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:49:41,440 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce611dab-788c-4b81-a514-4d18396713a6/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-13 17:49:41,520 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-13 17:49:41,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 17:49:41,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-13 17:49:41,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:49:41,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-13 17:49:41,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-13 17:49:41,988 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 17:49:41,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-11-13 17:49:42,123 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:49:42,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 17:49:42,582 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 29 treesize of output 27 [2021-11-13 17:49:42,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 35 [2021-11-13 17:49:43,288 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:49:43,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [539362009] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 17:49:43,288 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 17:49:43,289 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14, 14] total 36 [2021-11-13 17:49:43,289 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205799085] [2021-11-13 17:49:43,289 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 17:49:43,291 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-11-13 17:49:43,291 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:49:43,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-11-13 17:49:43,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=1179, Unknown=0, NotChecked=0, Total=1332 [2021-11-13 17:49:43,293 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand has 37 states, 33 states have (on average 2.393939393939394) internal successors, (79), 33 states have internal predecessors, (79), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-13 17:49:44,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:49:44,184 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2021-11-13 17:49:44,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-13 17:49:44,185 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 33 states have (on average 2.393939393939394) internal successors, (79), 33 states have internal predecessors, (79), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2021-11-13 17:49:44,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:49:44,185 INFO L225 Difference]: With dead ends: 43 [2021-11-13 17:49:44,185 INFO L226 Difference]: Without dead ends: 43 [2021-11-13 17:49:44,186 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=299, Invalid=2151, Unknown=0, NotChecked=0, Total=2450 [2021-11-13 17:49:44,187 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 67 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 518 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 285.56ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 607 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.37ms SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 518 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 59 IncrementalHoareTripleChecker+Unchecked, 334.42ms IncrementalHoareTripleChecker+Time [2021-11-13 17:49:44,187 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 145 Invalid, 607 Unknown, 0 Unchecked, 5.37ms Time], IncrementalHoareTripleChecker [30 Valid, 518 Invalid, 0 Unknown, 59 Unchecked, 334.42ms Time] [2021-11-13 17:49:44,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-11-13 17:49:44,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 41. [2021-11-13 17:49:44,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 36 states have (on average 1.0555555555555556) internal successors, (38), 36 states have internal predecessors, (38), 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) [2021-11-13 17:49:44,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2021-11-13 17:49:44,191 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 34 [2021-11-13 17:49:44,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:49:44,191 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2021-11-13 17:49:44,191 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 33 states have (on average 2.393939393939394) internal successors, (79), 33 states have internal predecessors, (79), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-13 17:49:44,191 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2021-11-13 17:49:44,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-13 17:49:44,192 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:49:44,197 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:49:44,234 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce611dab-788c-4b81-a514-4d18396713a6/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-13 17:49:44,397 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce611dab-788c-4b81-a514-4d18396713a6/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:49:44,398 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting cstrlenErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 2 more)] === [2021-11-13 17:49:44,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:49:44,398 INFO L85 PathProgramCache]: Analyzing trace with hash 983868736, now seen corresponding path program 5 times [2021-11-13 17:49:44,398 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:49:44,398 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560204189] [2021-11-13 17:49:44,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:49:44,398 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:49:44,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:44,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 17:49:44,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:44,610 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 25 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:49:44,610 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:49:44,610 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560204189] [2021-11-13 17:49:44,610 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560204189] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 17:49:44,610 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979469721] [2021-11-13 17:49:44,610 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-13 17:49:44,611 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:49:44,611 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce611dab-788c-4b81-a514-4d18396713a6/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:49:44,625 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce611dab-788c-4b81-a514-4d18396713a6/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:49:44,633 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce611dab-788c-4b81-a514-4d18396713a6/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-13 17:49:44,735 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-11-13 17:49:44,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 17:49:44,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-13 17:49:44,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:49:44,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-13 17:49:45,182 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 35 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:49:45,182 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 17:49:45,515 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 35 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:49:45,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [979469721] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 17:49:45,516 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 17:49:45,516 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 33 [2021-11-13 17:49:45,516 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572349321] [2021-11-13 17:49:45,517 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 17:49:45,517 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-13 17:49:45,518 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:49:45,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-13 17:49:45,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=883, Unknown=0, NotChecked=0, Total=1056 [2021-11-13 17:49:45,519 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand has 33 states, 32 states have (on average 2.65625) internal successors, (85), 29 states have internal predecessors, (85), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-13 17:49:45,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:49:45,844 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2021-11-13 17:49:45,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-13 17:49:45,845 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.65625) internal successors, (85), 29 states have internal predecessors, (85), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2021-11-13 17:49:45,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:49:45,846 INFO L225 Difference]: With dead ends: 64 [2021-11-13 17:49:45,846 INFO L226 Difference]: Without dead ends: 48 [2021-11-13 17:49:45,847 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=263, Invalid=1297, Unknown=0, NotChecked=0, Total=1560 [2021-11-13 17:49:45,847 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 49 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 144.84ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.56ms SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 171.83ms IncrementalHoareTripleChecker+Time [2021-11-13 17:49:45,848 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 74 Invalid, 298 Unknown, 0 Unchecked, 2.56ms Time], IncrementalHoareTripleChecker [15 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 171.83ms Time] [2021-11-13 17:49:45,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-11-13 17:49:45,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 45. [2021-11-13 17:49:45,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 40 states have (on average 1.05) internal successors, (42), 40 states have internal predecessors, (42), 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) [2021-11-13 17:49:45,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2021-11-13 17:49:45,852 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 40 [2021-11-13 17:49:45,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:49:45,852 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2021-11-13 17:49:45,853 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.65625) internal successors, (85), 29 states have internal predecessors, (85), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-13 17:49:45,853 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2021-11-13 17:49:45,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-13 17:49:45,854 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:49:45,854 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:49:45,891 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce611dab-788c-4b81-a514-4d18396713a6/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-13 17:49:46,081 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce611dab-788c-4b81-a514-4d18396713a6/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-13 17:49:46,081 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting cstrlenErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 2 more)] === [2021-11-13 17:49:46,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:49:46,081 INFO L85 PathProgramCache]: Analyzing trace with hash 1009410243, now seen corresponding path program 6 times [2021-11-13 17:49:46,081 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:49:46,082 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164675368] [2021-11-13 17:49:46,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:49:46,082 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:49:46,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:46,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 17:49:46,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:46,400 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 9 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:49:46,400 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:49:46,402 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164675368] [2021-11-13 17:49:46,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164675368] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 17:49:46,404 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253291244] [2021-11-13 17:49:46,404 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-13 17:49:46,404 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:49:46,404 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce611dab-788c-4b81-a514-4d18396713a6/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:49:46,406 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce611dab-788c-4b81-a514-4d18396713a6/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:49:46,408 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce611dab-788c-4b81-a514-4d18396713a6/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-13 17:49:46,494 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-11-13 17:49:46,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 17:49:46,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 45 conjunts are in the unsatisfiable core [2021-11-13 17:49:46,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:49:46,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-13 17:49:46,954 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 [2021-11-13 17:49:46,959 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 9 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:49:46,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 17:49:47,103 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 13 [2021-11-13 17:49:47,106 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 26 treesize of output 22 [2021-11-13 17:49:47,297 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 9 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:49:47,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [253291244] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 17:49:47,298 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 17:49:47,298 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 33 [2021-11-13 17:49:47,299 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172018675] [2021-11-13 17:49:47,299 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 17:49:47,299 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-13 17:49:47,300 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:49:47,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-13 17:49:47,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=960, Unknown=0, NotChecked=0, Total=1056 [2021-11-13 17:49:47,301 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand has 33 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-13 17:49:47,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:49:47,971 INFO L93 Difference]: Finished difference Result 69 states and 70 transitions. [2021-11-13 17:49:47,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-13 17:49:47,972 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2021-11-13 17:49:47,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:49:47,972 INFO L225 Difference]: With dead ends: 69 [2021-11-13 17:49:47,973 INFO L226 Difference]: Without dead ends: 52 [2021-11-13 17:49:47,974 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 72 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=199, Invalid=1871, Unknown=0, NotChecked=0, Total=2070 [2021-11-13 17:49:47,974 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 52 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 651 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 263.27ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 670 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.41ms SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 651 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 333.57ms IncrementalHoareTripleChecker+Time [2021-11-13 17:49:47,975 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 178 Invalid, 670 Unknown, 0 Unchecked, 7.41ms Time], IncrementalHoareTripleChecker [19 Valid, 651 Invalid, 0 Unknown, 0 Unchecked, 333.57ms Time] [2021-11-13 17:49:47,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-11-13 17:49:47,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 49. [2021-11-13 17:49:47,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 44 states have (on average 1.0454545454545454) internal successors, (46), 44 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) [2021-11-13 17:49:47,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2021-11-13 17:49:47,979 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 44 [2021-11-13 17:49:47,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:49:47,980 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2021-11-13 17:49:47,980 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-13 17:49:47,980 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2021-11-13 17:49:47,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-13 17:49:47,982 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:49:47,982 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:49:48,024 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce611dab-788c-4b81-a514-4d18396713a6/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-13 17:49:48,182 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce611dab-788c-4b81-a514-4d18396713a6/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-13 17:49:48,182 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting cstrlenErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 2 more)] === [2021-11-13 17:49:48,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:49:48,183 INFO L85 PathProgramCache]: Analyzing trace with hash 1167106758, now seen corresponding path program 7 times [2021-11-13 17:49:48,183 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:49:48,183 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854265972] [2021-11-13 17:49:48,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:49:48,183 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:49:48,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:48,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 17:49:48,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:48,468 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 15 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:49:48,468 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:49:48,468 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854265972] [2021-11-13 17:49:48,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854265972] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 17:49:48,468 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521956204] [2021-11-13 17:49:48,468 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-13 17:49:48,468 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:49:48,468 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce611dab-788c-4b81-a514-4d18396713a6/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:49:48,469 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce611dab-788c-4b81-a514-4d18396713a6/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:49:48,485 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce611dab-788c-4b81-a514-4d18396713a6/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-13 17:49:48,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:48,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 40 conjunts are in the unsatisfiable core [2021-11-13 17:49:48,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:49:48,878 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 28 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:49:48,878 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 17:49:49,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-13 17:49:49,288 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 28 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:49:49,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [521956204] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 17:49:49,288 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 17:49:49,288 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 35 [2021-11-13 17:49:49,289 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851741799] [2021-11-13 17:49:49,289 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 17:49:49,289 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-13 17:49:49,289 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:49:49,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-13 17:49:49,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1115, Unknown=0, NotChecked=0, Total=1260 [2021-11-13 17:49:49,291 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand has 36 states, 32 states have (on average 2.8125) internal successors, (90), 32 states have internal predecessors, (90), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-13 17:49:49,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:49:49,798 INFO L93 Difference]: Finished difference Result 54 states and 55 transitions. [2021-11-13 17:49:49,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-13 17:49:49,799 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 32 states have (on average 2.8125) internal successors, (90), 32 states have internal predecessors, (90), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2021-11-13 17:49:49,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:49:49,799 INFO L225 Difference]: With dead ends: 54 [2021-11-13 17:49:49,800 INFO L226 Difference]: Without dead ends: 54 [2021-11-13 17:49:49,801 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 76 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 480 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=253, Invalid=1727, Unknown=0, NotChecked=0, Total=1980 [2021-11-13 17:49:49,801 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 104 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 658 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 245.62ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 699 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.82ms SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 658 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 308.88ms IncrementalHoareTripleChecker+Time [2021-11-13 17:49:49,802 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 164 Invalid, 699 Unknown, 0 Unchecked, 3.82ms Time], IncrementalHoareTripleChecker [41 Valid, 658 Invalid, 0 Unknown, 0 Unchecked, 308.88ms Time] [2021-11-13 17:49:49,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-11-13 17:49:49,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 52. [2021-11-13 17:49:49,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 47 states have (on average 1.0425531914893618) internal successors, (49), 47 states have internal predecessors, (49), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-13 17:49:49,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2021-11-13 17:49:49,806 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 48 [2021-11-13 17:49:49,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:49:49,807 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2021-11-13 17:49:49,807 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 32 states have (on average 2.8125) internal successors, (90), 32 states have internal predecessors, (90), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-13 17:49:49,807 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2021-11-13 17:49:49,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-13 17:49:49,809 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:49:49,809 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:49:49,837 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce611dab-788c-4b81-a514-4d18396713a6/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-13 17:49:50,017 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce611dab-788c-4b81-a514-4d18396713a6/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-13 17:49:50,017 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting cstrlenErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 2 more)] === [2021-11-13 17:49:50,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:49:50,017 INFO L85 PathProgramCache]: Analyzing trace with hash 1517157576, now seen corresponding path program 8 times [2021-11-13 17:49:50,017 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:49:50,017 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265380256] [2021-11-13 17:49:50,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:49:50,018 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:49:50,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:50,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 17:49:50,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:50,324 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 11 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:49:50,324 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:49:50,324 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265380256] [2021-11-13 17:49:50,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265380256] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 17:49:50,325 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829650711] [2021-11-13 17:49:50,325 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 17:49:50,325 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:49:50,325 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce611dab-788c-4b81-a514-4d18396713a6/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:49:50,329 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce611dab-788c-4b81-a514-4d18396713a6/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:49:50,333 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce611dab-788c-4b81-a514-4d18396713a6/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-13 17:49:50,444 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 17:49:50,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 17:49:50,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-13 17:49:50,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:49:50,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-11-13 17:49:51,703 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 17:49:51,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 33 [2021-11-13 17:49:51,861 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 28 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:49:51,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 17:49:52,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 34 [2021-11-13 17:49:52,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2021-11-13 17:49:52,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 35 [2021-11-13 17:49:52,720 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 28 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:49:52,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1829650711] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 17:49:52,720 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 17:49:52,720 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 50 [2021-11-13 17:49:52,721 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626397452] [2021-11-13 17:49:52,721 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 17:49:52,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-11-13 17:49:52,721 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:49:52,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-11-13 17:49:52,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=2261, Unknown=0, NotChecked=0, Total=2450 [2021-11-13 17:49:52,723 INFO L87 Difference]: Start difference. First operand 52 states and 53 transitions. Second operand has 50 states, 47 states have (on average 2.382978723404255) internal successors, (112), 46 states have internal predecessors, (112), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-13 17:49:53,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:49:53,590 INFO L93 Difference]: Finished difference Result 84 states and 85 transitions. [2021-11-13 17:49:53,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-13 17:49:53,590 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 47 states have (on average 2.382978723404255) internal successors, (112), 46 states have internal predecessors, (112), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2021-11-13 17:49:53,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:49:53,591 INFO L225 Difference]: With dead ends: 84 [2021-11-13 17:49:53,591 INFO L226 Difference]: Without dead ends: 64 [2021-11-13 17:49:53,593 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 81 SyntacticMatches, 3 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 656 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=354, Invalid=4068, Unknown=0, NotChecked=0, Total=4422 [2021-11-13 17:49:53,594 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 77 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 574 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 201.97ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 747 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.52ms SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 574 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 156 IncrementalHoareTripleChecker+Unchecked, 256.60ms IncrementalHoareTripleChecker+Time [2021-11-13 17:49:53,594 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 315 Invalid, 747 Unknown, 0 Unchecked, 3.52ms Time], IncrementalHoareTripleChecker [17 Valid, 574 Invalid, 0 Unknown, 156 Unchecked, 256.60ms Time] [2021-11-13 17:49:53,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-11-13 17:49:53,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 59. [2021-11-13 17:49:53,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 54 states have (on average 1.037037037037037) internal successors, (56), 54 states have internal predecessors, (56), 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) [2021-11-13 17:49:53,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2021-11-13 17:49:53,598 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 51 [2021-11-13 17:49:53,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:49:53,599 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2021-11-13 17:49:53,599 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 47 states have (on average 2.382978723404255) internal successors, (112), 46 states have internal predecessors, (112), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-13 17:49:53,599 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2021-11-13 17:49:53,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-13 17:49:53,601 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:49:53,601 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:49:53,625 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce611dab-788c-4b81-a514-4d18396713a6/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-13 17:49:53,809 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce611dab-788c-4b81-a514-4d18396713a6/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-13 17:49:53,809 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting cstrlenErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 2 more)] === [2021-11-13 17:49:53,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:49:53,810 INFO L85 PathProgramCache]: Analyzing trace with hash 470099401, now seen corresponding path program 9 times [2021-11-13 17:49:53,810 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:49:53,810 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819946864] [2021-11-13 17:49:53,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:49:53,810 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:49:53,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:54,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 17:49:54,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:54,174 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 13 proven. 123 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:49:54,174 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:49:54,174 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819946864] [2021-11-13 17:49:54,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819946864] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 17:49:54,174 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569645116] [2021-11-13 17:49:54,174 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-13 17:49:54,174 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:49:54,174 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce611dab-788c-4b81-a514-4d18396713a6/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:49:54,175 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce611dab-788c-4b81-a514-4d18396713a6/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:49:54,176 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce611dab-788c-4b81-a514-4d18396713a6/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-13 17:49:54,311 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-11-13 17:49:54,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 17:49:54,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 35 conjunts are in the unsatisfiable core [2021-11-13 17:49:54,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:49:54,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-13 17:49:54,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-13 17:49:54,845 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 17:49:54,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 26 [2021-11-13 17:49:54,968 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2021-11-13 17:49:54,968 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 17:49:55,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 29 [2021-11-13 17:49:55,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 35 [2021-11-13 17:49:55,854 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2021-11-13 17:49:55,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [569645116] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 17:49:55,855 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 17:49:55,855 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 8, 8] total 36 [2021-11-13 17:49:55,858 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003404532] [2021-11-13 17:49:55,858 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 17:49:55,860 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-13 17:49:55,860 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:49:55,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-13 17:49:55,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1177, Unknown=0, NotChecked=0, Total=1260 [2021-11-13 17:49:55,862 INFO L87 Difference]: Start difference. First operand 59 states and 60 transitions. Second operand has 36 states, 33 states have (on average 2.5757575757575757) internal successors, (85), 32 states have internal predecessors, (85), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-13 17:49:57,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:49:57,366 INFO L93 Difference]: Finished difference Result 88 states and 89 transitions. [2021-11-13 17:49:57,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-11-13 17:49:57,367 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 33 states have (on average 2.5757575757575757) internal successors, (85), 32 states have internal predecessors, (85), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2021-11-13 17:49:57,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:49:57,367 INFO L225 Difference]: With dead ends: 88 [2021-11-13 17:49:57,367 INFO L226 Difference]: Without dead ends: 0 [2021-11-13 17:49:57,369 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 643 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=377, Invalid=4593, Unknown=0, NotChecked=0, Total=4970 [2021-11-13 17:49:57,369 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 15 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 575 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 208.25ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 689 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.21ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 575 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 111 IncrementalHoareTripleChecker+Unchecked, 253.70ms IncrementalHoareTripleChecker+Time [2021-11-13 17:49:57,370 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 286 Invalid, 689 Unknown, 0 Unchecked, 6.21ms Time], IncrementalHoareTripleChecker [3 Valid, 575 Invalid, 0 Unknown, 111 Unchecked, 253.70ms Time] [2021-11-13 17:49:57,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-11-13 17:49:57,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-11-13 17:49:57,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:49:57,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-11-13 17:49:57,371 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 58 [2021-11-13 17:49:57,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:49:57,371 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-11-13 17:49:57,371 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 33 states have (on average 2.5757575757575757) internal successors, (85), 32 states have internal predecessors, (85), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-13 17:49:57,371 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-11-13 17:49:57,371 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-11-13 17:49:57,373 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr0REQUIRES_VIOLATION (6 of 7 remaining) [2021-11-13 17:49:57,373 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr1REQUIRES_VIOLATION (5 of 7 remaining) [2021-11-13 17:49:57,374 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr2REQUIRES_VIOLATION (4 of 7 remaining) [2021-11-13 17:49:57,374 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr3REQUIRES_VIOLATION (3 of 7 remaining) [2021-11-13 17:49:57,374 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr4ENSURES_VIOLATIONMEMORY_LEAK (2 of 7 remaining) [2021-11-13 17:49:57,374 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrlenErr0REQUIRES_VIOLATION (1 of 7 remaining) [2021-11-13 17:49:57,374 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrlenErr1REQUIRES_VIOLATION (0 of 7 remaining) [2021-11-13 17:49:57,399 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce611dab-788c-4b81-a514-4d18396713a6/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-13 17:49:57,581 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce611dab-788c-4b81-a514-4d18396713a6/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:49:57,584 INFO L732 BasicCegarLoop]: Path program histogram: [9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:49:57,588 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-13 17:49:57,594 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.11 05:49:57 BoogieIcfgContainer [2021-11-13 17:49:57,595 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-13 17:49:57,596 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-13 17:49:57,596 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-13 17:49:57,596 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-13 17:49:57,597 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 05:49:32" (3/4) ... [2021-11-13 17:49:57,600 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-11-13 17:49:57,605 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2021-11-13 17:49:57,605 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __bswap_32 [2021-11-13 17:49:57,606 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __bswap_64 [2021-11-13 17:49:57,606 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __uint16_identity [2021-11-13 17:49:57,606 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __uint64_identity [2021-11-13 17:49:57,606 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure cstrlen [2021-11-13 17:49:57,606 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2021-11-13 17:49:57,606 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __uint32_identity [2021-11-13 17:49:57,610 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 12 nodes and edges [2021-11-13 17:49:57,611 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2021-11-13 17:49:57,611 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-11-13 17:49:57,611 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-11-13 17:49:57,638 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce611dab-788c-4b81-a514-4d18396713a6/bin/uautomizer-YU5uOKAj3y/witness.graphml [2021-11-13 17:49:57,638 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-13 17:49:57,639 INFO L158 Benchmark]: Toolchain (without parser) took 26787.88ms. Allocated memory was 107.0MB in the beginning and 157.3MB in the end (delta: 50.3MB). Free memory was 70.0MB in the beginning and 91.5MB in the end (delta: -21.5MB). Peak memory consumption was 28.3MB. Max. memory is 16.1GB. [2021-11-13 17:49:57,639 INFO L158 Benchmark]: CDTParser took 0.28ms. Allocated memory is still 107.0MB. Free memory is still 87.9MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-13 17:49:57,639 INFO L158 Benchmark]: CACSL2BoogieTranslator took 602.29ms. Allocated memory is still 107.0MB. Free memory was 69.8MB in the beginning and 77.3MB in the end (delta: -7.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-13 17:49:57,640 INFO L158 Benchmark]: Boogie Preprocessor took 64.94ms. Allocated memory is still 107.0MB. Free memory was 77.3MB in the beginning and 75.1MB in the end (delta: 2.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-13 17:49:57,640 INFO L158 Benchmark]: RCFGBuilder took 642.39ms. Allocated memory is still 107.0MB. Free memory was 75.1MB in the beginning and 57.0MB in the end (delta: 18.1MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. [2021-11-13 17:49:57,641 INFO L158 Benchmark]: TraceAbstraction took 25427.66ms. Allocated memory was 107.0MB in the beginning and 157.3MB in the end (delta: 50.3MB). Free memory was 56.7MB in the beginning and 94.6MB in the end (delta: -38.0MB). Peak memory consumption was 14.0MB. Max. memory is 16.1GB. [2021-11-13 17:49:57,641 INFO L158 Benchmark]: Witness Printer took 42.51ms. Allocated memory is still 157.3MB. Free memory was 94.6MB in the beginning and 91.5MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-11-13 17:49:57,643 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28ms. Allocated memory is still 107.0MB. Free memory is still 87.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 602.29ms. Allocated memory is still 107.0MB. Free memory was 69.8MB in the beginning and 77.3MB in the end (delta: -7.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Preprocessor took 64.94ms. Allocated memory is still 107.0MB. Free memory was 77.3MB in the beginning and 75.1MB in the end (delta: 2.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 642.39ms. Allocated memory is still 107.0MB. Free memory was 75.1MB in the beginning and 57.0MB in the end (delta: 18.1MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. * TraceAbstraction took 25427.66ms. Allocated memory was 107.0MB in the beginning and 157.3MB in the end (delta: 50.3MB). Free memory was 56.7MB in the beginning and 94.6MB in the end (delta: -38.0MB). Peak memory consumption was 14.0MB. Max. memory is 16.1GB. * Witness Printer took 42.51ms. Allocated memory is still 157.3MB. Free memory was 94.6MB in the beginning and 91.5MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 530]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 530]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 532]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 532]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 522]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 518]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 518]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 9 procedures, 48 locations, 7 error locations. Started 1 CEGAR loops. OverallTime: 25.3s, OverallIterations: 19, TraceHistogramMax: 7, PathProgramHistogramMax: 9, EmptinessCheckTime: 0.0s, AutomataDifference: 7.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 847 SdHoareTripleChecker+Valid, 2842.74ms IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 837 mSDsluCounter, 1858 SdHoareTripleChecker+Invalid, 2306.63ms Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 439 IncrementalHoareTripleChecker+Unchecked, 1532 mSDsCounter, 257 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 4614 IncrementalHoareTripleChecker+Invalid, 5310 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 257 mSolverCounterUnsat, 326 mSDtfsCounter, 4614 mSolverCounterSat, 68.26ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1087 GetRequests, 595 SyntacticMatches, 18 SemanticMatches, 474 ConstructedPredicates, 0 IntricatePredicates, 6 DeprecatedPredicates, 3407 ImplicationChecksByTransitivity, 10.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=59occurred in iteration=18, InterpolantAutomatonStates: 260, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 19 MinimizatonAttempts, 77 StatesRemovedByMinimization, 14 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 13.9s InterpolantComputationTime, 841 NumberOfCodeBlocks, 837 NumberOfCodeBlocksAsserted, 51 NumberOfCheckSat, 1164 ConstructedInterpolants, 82 QuantifiedInterpolants, 10343 SizeOfPredicates, 103 NumberOfNonLiveVariables, 1398 ConjunctsInSsa, 328 ConjunctsInUnsatCore, 39 InterpolantComputations, 9 PerfectInterpolantSequences, 552/1442 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 7 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-11-13 17:49:57,689 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce611dab-788c-4b81-a514-4d18396713a6/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE