./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/cstrlen_unsafe.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_741a9b7c-6523-4fad-9699-71cf69cb5922/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_741a9b7c-6523-4fad-9699-71cf69cb5922/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_741a9b7c-6523-4fad-9699-71cf69cb5922/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_741a9b7c-6523-4fad-9699-71cf69cb5922/bin/uautomizer/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/cstrlen_unsafe.i -s /tmp/vcloud-vcloud-master/worker/run_dir_741a9b7c-6523-4fad-9699-71cf69cb5922/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_741a9b7c-6523-4fad-9699-71cf69cb5922/bin/uautomizer --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 15362e3354379e86b7768de02eb760f50ed72879 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(valid-deref) --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-28 02:57:40,339 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-28 02:57:40,341 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-28 02:57:40,404 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-28 02:57:40,404 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-28 02:57:40,406 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-28 02:57:40,408 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-28 02:57:40,410 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-28 02:57:40,413 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-28 02:57:40,414 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-28 02:57:40,415 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-28 02:57:40,417 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-28 02:57:40,417 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-28 02:57:40,419 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-28 02:57:40,420 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-28 02:57:40,422 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-28 02:57:40,423 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-28 02:57:40,424 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-28 02:57:40,427 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-28 02:57:40,429 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-28 02:57:40,432 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-28 02:57:40,433 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-28 02:57:40,435 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-28 02:57:40,436 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-28 02:57:40,439 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-28 02:57:40,440 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-28 02:57:40,440 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-28 02:57:40,442 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-28 02:57:40,442 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-28 02:57:40,443 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-28 02:57:40,444 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-28 02:57:40,445 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-28 02:57:40,446 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-28 02:57:40,447 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-28 02:57:40,448 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-28 02:57:40,448 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-28 02:57:40,449 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-28 02:57:40,450 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-28 02:57:40,450 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-28 02:57:40,451 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-28 02:57:40,452 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-28 02:57:40,453 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_741a9b7c-6523-4fad-9699-71cf69cb5922/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2020-11-28 02:57:40,478 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-28 02:57:40,478 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-28 02:57:40,480 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-28 02:57:40,480 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-28 02:57:40,480 INFO L138 SettingsManager]: * Use SBE=true [2020-11-28 02:57:40,481 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-28 02:57:40,481 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-28 02:57:40,481 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-11-28 02:57:40,481 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-28 02:57:40,482 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-28 02:57:40,482 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-28 02:57:40,482 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-11-28 02:57:40,482 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-11-28 02:57:40,482 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-11-28 02:57:40,483 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-28 02:57:40,483 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-28 02:57:40,483 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-28 02:57:40,483 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-28 02:57:40,484 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-28 02:57:40,484 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-28 02:57:40,484 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-28 02:57:40,484 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-28 02:57:40,484 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 02:57:40,485 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-28 02:57:40,485 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-28 02:57:40,485 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-28 02:57:40,485 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-28 02:57:40,486 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-28 02:57:40,486 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-vcloud-master/worker/run_dir_741a9b7c-6523-4fad-9699-71cf69cb5922/bin/uautomizer/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_741a9b7c-6523-4fad-9699-71cf69cb5922/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 15362e3354379e86b7768de02eb760f50ed72879 [2020-11-28 02:57:40,760 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-28 02:57:40,800 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-28 02:57:40,804 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-28 02:57:40,806 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-28 02:57:40,807 INFO L275 PluginConnector]: CDTParser initialized [2020-11-28 02:57:40,809 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_741a9b7c-6523-4fad-9699-71cf69cb5922/bin/uautomizer/../../sv-benchmarks/c/array-memsafety/cstrlen_unsafe.i [2020-11-28 02:57:40,904 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_741a9b7c-6523-4fad-9699-71cf69cb5922/bin/uautomizer/data/8ddec8a56/aa4d7ce45a63477f914eab56e6223401/FLAGf6cdccee2 [2020-11-28 02:57:41,501 INFO L306 CDTParser]: Found 1 translation units. [2020-11-28 02:57:41,506 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_741a9b7c-6523-4fad-9699-71cf69cb5922/sv-benchmarks/c/array-memsafety/cstrlen_unsafe.i [2020-11-28 02:57:41,522 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_741a9b7c-6523-4fad-9699-71cf69cb5922/bin/uautomizer/data/8ddec8a56/aa4d7ce45a63477f914eab56e6223401/FLAGf6cdccee2 [2020-11-28 02:57:41,792 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_741a9b7c-6523-4fad-9699-71cf69cb5922/bin/uautomizer/data/8ddec8a56/aa4d7ce45a63477f914eab56e6223401 [2020-11-28 02:57:41,795 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-28 02:57:41,796 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-11-28 02:57:41,798 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-28 02:57:41,798 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-28 02:57:41,802 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-28 02:57:41,804 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 02:57:41" (1/1) ... [2020-11-28 02:57:41,812 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@72bae54e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:57:41, skipping insertion in model container [2020-11-28 02:57:41,812 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 02:57:41" (1/1) ... [2020-11-28 02:57:41,820 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-28 02:57:41,884 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-28 02:57:42,256 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 02:57:42,271 INFO L203 MainTranslator]: Completed pre-run [2020-11-28 02:57:42,342 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 02:57:42,409 INFO L208 MainTranslator]: Completed translation [2020-11-28 02:57:42,411 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:57:42 WrapperNode [2020-11-28 02:57:42,411 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-28 02:57:42,412 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-28 02:57:42,412 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-28 02:57:42,412 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-28 02:57:42,425 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:57:42" (1/1) ... [2020-11-28 02:57:42,425 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:57:42" (1/1) ... [2020-11-28 02:57:42,455 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:57:42" (1/1) ... [2020-11-28 02:57:42,457 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:57:42" (1/1) ... [2020-11-28 02:57:42,485 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:57:42" (1/1) ... [2020-11-28 02:57:42,502 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:57:42" (1/1) ... [2020-11-28 02:57:42,506 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:57:42" (1/1) ... [2020-11-28 02:57:42,513 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-28 02:57:42,523 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-28 02:57:42,523 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-28 02:57:42,523 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-28 02:57:42,524 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:57:42" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_741a9b7c-6523-4fad-9699-71cf69cb5922/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 02:57:42,596 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-28 02:57:42,596 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-28 02:57:42,596 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-11-28 02:57:42,596 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-11-28 02:57:42,596 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2020-11-28 02:57:42,596 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2020-11-28 02:57:42,597 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2020-11-28 02:57:42,597 INFO L138 BoogieDeclarations]: Found implementation of procedure build_nondet_String [2020-11-28 02:57:42,597 INFO L138 BoogieDeclarations]: Found implementation of procedure cstrlen [2020-11-28 02:57:42,597 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-28 02:57:42,597 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-11-28 02:57:42,597 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-11-28 02:57:42,597 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-11-28 02:57:42,598 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-11-28 02:57:42,598 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-11-28 02:57:42,598 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-11-28 02:57:42,598 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-11-28 02:57:42,598 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-11-28 02:57:42,599 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-11-28 02:57:42,599 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-11-28 02:57:42,599 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-11-28 02:57:42,599 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-11-28 02:57:42,599 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-11-28 02:57:42,599 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-11-28 02:57:42,599 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-11-28 02:57:42,600 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-11-28 02:57:42,600 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-11-28 02:57:42,600 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-11-28 02:57:42,600 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2020-11-28 02:57:42,600 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2020-11-28 02:57:42,600 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2020-11-28 02:57:42,600 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-11-28 02:57:42,601 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-11-28 02:57:42,601 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-11-28 02:57:42,601 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-11-28 02:57:42,601 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-11-28 02:57:42,601 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-11-28 02:57:42,601 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-11-28 02:57:42,601 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-11-28 02:57:42,602 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-11-28 02:57:42,602 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-11-28 02:57:42,602 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-11-28 02:57:42,602 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-11-28 02:57:42,603 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-11-28 02:57:42,603 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-11-28 02:57:42,603 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-11-28 02:57:42,603 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-11-28 02:57:42,603 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-11-28 02:57:42,603 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-11-28 02:57:42,603 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-11-28 02:57:42,604 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-11-28 02:57:42,604 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-11-28 02:57:42,604 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-11-28 02:57:42,605 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-11-28 02:57:42,605 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-11-28 02:57:42,605 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-11-28 02:57:42,606 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-11-28 02:57:42,606 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-11-28 02:57:42,607 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-11-28 02:57:42,607 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-11-28 02:57:42,608 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-11-28 02:57:42,608 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-11-28 02:57:42,608 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-11-28 02:57:42,608 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-11-28 02:57:42,608 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-11-28 02:57:42,608 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-11-28 02:57:42,608 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-11-28 02:57:42,609 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-11-28 02:57:42,609 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-11-28 02:57:42,609 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-11-28 02:57:42,609 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-11-28 02:57:42,610 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-11-28 02:57:42,612 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-11-28 02:57:42,612 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-28 02:57:42,613 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-11-28 02:57:42,613 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-11-28 02:57:42,613 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-11-28 02:57:42,613 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-11-28 02:57:42,614 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-11-28 02:57:42,614 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-11-28 02:57:42,614 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-11-28 02:57:42,614 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-11-28 02:57:42,614 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-11-28 02:57:42,614 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-11-28 02:57:42,614 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-11-28 02:57:42,615 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-11-28 02:57:42,615 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-11-28 02:57:42,615 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-11-28 02:57:42,615 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-11-28 02:57:42,615 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-11-28 02:57:42,615 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-11-28 02:57:42,615 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-11-28 02:57:42,616 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-11-28 02:57:42,616 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-11-28 02:57:42,616 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-11-28 02:57:42,616 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-11-28 02:57:42,616 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-11-28 02:57:42,616 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-11-28 02:57:42,616 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-11-28 02:57:42,617 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-11-28 02:57:42,617 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-11-28 02:57:42,617 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-11-28 02:57:42,617 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-11-28 02:57:42,617 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-11-28 02:57:42,617 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-11-28 02:57:42,617 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-11-28 02:57:42,618 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-11-28 02:57:42,618 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-11-28 02:57:42,618 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-11-28 02:57:42,618 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-11-28 02:57:42,618 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-11-28 02:57:42,618 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-11-28 02:57:42,618 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-11-28 02:57:42,618 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-11-28 02:57:42,619 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-11-28 02:57:42,619 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-11-28 02:57:42,619 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-11-28 02:57:42,619 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-11-28 02:57:42,619 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-11-28 02:57:42,619 INFO L130 BoogieDeclarations]: Found specification of procedure build_nondet_String [2020-11-28 02:57:42,619 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-11-28 02:57:42,620 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-28 02:57:42,620 INFO L130 BoogieDeclarations]: Found specification of procedure cstrlen [2020-11-28 02:57:42,620 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-28 02:57:42,620 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-28 02:57:42,620 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-28 02:57:42,620 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-28 02:57:42,620 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-28 02:57:43,180 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-28 02:57:43,181 INFO L298 CfgBuilder]: Removed 2 assume(true) statements. [2020-11-28 02:57:43,182 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 02:57:43 BoogieIcfgContainer [2020-11-28 02:57:43,183 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-28 02:57:43,184 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-28 02:57:43,185 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-28 02:57:43,188 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-28 02:57:43,189 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 02:57:41" (1/3) ... [2020-11-28 02:57:43,190 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45bab39d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 02:57:43, skipping insertion in model container [2020-11-28 02:57:43,190 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:57:42" (2/3) ... [2020-11-28 02:57:43,190 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45bab39d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 02:57:43, skipping insertion in model container [2020-11-28 02:57:43,191 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 02:57:43" (3/3) ... [2020-11-28 02:57:43,192 INFO L111 eAbstractionObserver]: Analyzing ICFG cstrlen_unsafe.i [2020-11-28 02:57:43,205 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-28 02:57:43,211 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 10 error locations. [2020-11-28 02:57:43,223 INFO L253 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2020-11-28 02:57:43,249 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-28 02:57:43,250 INFO L378 AbstractCegarLoop]: Hoare is false [2020-11-28 02:57:43,250 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-28 02:57:43,250 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-28 02:57:43,250 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-28 02:57:43,250 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-28 02:57:43,250 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-28 02:57:43,250 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-28 02:57:43,266 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states. [2020-11-28 02:57:43,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-28 02:57:43,274 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:57:43,275 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 02:57:43,275 INFO L429 AbstractCegarLoop]: === Iteration 1 === [build_nondet_StringErr3REQUIRES_VIOLATION, build_nondet_StringErr2REQUIRES_VIOLATION, build_nondet_StringErr1REQUIRES_VIOLATION, build_nondet_StringErr0REQUIRES_VIOLATION, cstrlenErr1REQUIRES_VIOLATION, cstrlenErr0REQUIRES_VIOLATION, mainErr0ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr3ENSURES_VIOLATIONMEMORY_LEAK, mainErr1ASSERT_VIOLATIONMEMORY_FREE]=== [2020-11-28 02:57:43,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:57:43,281 INFO L82 PathProgramCache]: Analyzing trace with hash 1978316378, now seen corresponding path program 1 times [2020-11-28 02:57:43,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:57:43,291 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897162802] [2020-11-28 02:57:43,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:57:43,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:57:43,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 02:57:43,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:57:43,493 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 02:57:43,493 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897162802] [2020-11-28 02:57:43,497 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 02:57:43,497 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 02:57:43,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186777840] [2020-11-28 02:57:43,502 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 02:57:43,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:57:43,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 02:57:43,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 02:57:43,519 INFO L87 Difference]: Start difference. First operand 43 states. Second operand 4 states. [2020-11-28 02:57:43,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:57:43,706 INFO L93 Difference]: Finished difference Result 41 states and 43 transitions. [2020-11-28 02:57:43,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 02:57:43,708 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2020-11-28 02:57:43,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 02:57:43,725 INFO L225 Difference]: With dead ends: 41 [2020-11-28 02:57:43,725 INFO L226 Difference]: Without dead ends: 38 [2020-11-28 02:57:43,727 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 02:57:43,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-11-28 02:57:43,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-11-28 02:57:43,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-11-28 02:57:43,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2020-11-28 02:57:43,773 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 11 [2020-11-28 02:57:43,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 02:57:43,773 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2020-11-28 02:57:43,773 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 02:57:43,773 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2020-11-28 02:57:43,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-28 02:57:43,774 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:57:43,774 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 02:57:43,775 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-28 02:57:43,775 INFO L429 AbstractCegarLoop]: === Iteration 2 === [build_nondet_StringErr3REQUIRES_VIOLATION, build_nondet_StringErr2REQUIRES_VIOLATION, build_nondet_StringErr1REQUIRES_VIOLATION, build_nondet_StringErr0REQUIRES_VIOLATION, cstrlenErr1REQUIRES_VIOLATION, cstrlenErr0REQUIRES_VIOLATION, mainErr0ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr3ENSURES_VIOLATIONMEMORY_LEAK, mainErr1ASSERT_VIOLATIONMEMORY_FREE]=== [2020-11-28 02:57:43,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:57:43,777 INFO L82 PathProgramCache]: Analyzing trace with hash 1978316379, now seen corresponding path program 1 times [2020-11-28 02:57:43,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:57:43,777 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086875514] [2020-11-28 02:57:43,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:57:43,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:57:43,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 02:57:43,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:57:43,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 02:57:43,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086875514] [2020-11-28 02:57:43,948 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 02:57:43,948 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 02:57:43,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408184426] [2020-11-28 02:57:43,949 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-28 02:57:43,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:57:43,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-28 02:57:43,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-11-28 02:57:43,951 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand 5 states. [2020-11-28 02:57:44,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:57:44,074 INFO L93 Difference]: Finished difference Result 37 states and 39 transitions. [2020-11-28 02:57:44,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-28 02:57:44,075 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2020-11-28 02:57:44,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 02:57:44,076 INFO L225 Difference]: With dead ends: 37 [2020-11-28 02:57:44,076 INFO L226 Difference]: Without dead ends: 37 [2020-11-28 02:57:44,077 INFO L677 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 [2020-11-28 02:57:44,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-11-28 02:57:44,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-11-28 02:57:44,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-11-28 02:57:44,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2020-11-28 02:57:44,082 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 11 [2020-11-28 02:57:44,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 02:57:44,082 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2020-11-28 02:57:44,083 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-28 02:57:44,083 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2020-11-28 02:57:44,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-28 02:57:44,083 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:57:44,083 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 02:57:44,083 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-28 02:57:44,084 INFO L429 AbstractCegarLoop]: === Iteration 3 === [build_nondet_StringErr3REQUIRES_VIOLATION, build_nondet_StringErr2REQUIRES_VIOLATION, build_nondet_StringErr1REQUIRES_VIOLATION, build_nondet_StringErr0REQUIRES_VIOLATION, cstrlenErr1REQUIRES_VIOLATION, cstrlenErr0REQUIRES_VIOLATION, mainErr0ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr3ENSURES_VIOLATIONMEMORY_LEAK, mainErr1ASSERT_VIOLATIONMEMORY_FREE]=== [2020-11-28 02:57:44,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:57:44,084 INFO L82 PathProgramCache]: Analyzing trace with hash 1978316432, now seen corresponding path program 1 times [2020-11-28 02:57:44,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:57:44,085 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492346439] [2020-11-28 02:57:44,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:57:44,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:57:44,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 02:57:44,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:57:44,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 02:57:44,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492346439] [2020-11-28 02:57:44,187 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 02:57:44,187 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-28 02:57:44,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011269055] [2020-11-28 02:57:44,187 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-28 02:57:44,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:57:44,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-28 02:57:44,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-11-28 02:57:44,196 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand 5 states. [2020-11-28 02:57:44,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:57:44,324 INFO L93 Difference]: Finished difference Result 43 states and 45 transitions. [2020-11-28 02:57:44,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-28 02:57:44,327 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2020-11-28 02:57:44,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 02:57:44,330 INFO L225 Difference]: With dead ends: 43 [2020-11-28 02:57:44,330 INFO L226 Difference]: Without dead ends: 43 [2020-11-28 02:57:44,330 INFO L677 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 [2020-11-28 02:57:44,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-11-28 02:57:44,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 39. [2020-11-28 02:57:44,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-11-28 02:57:44,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2020-11-28 02:57:44,341 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 11 [2020-11-28 02:57:44,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 02:57:44,343 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2020-11-28 02:57:44,343 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-28 02:57:44,343 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2020-11-28 02:57:44,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-28 02:57:44,344 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:57:44,344 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 02:57:44,345 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-28 02:57:44,345 INFO L429 AbstractCegarLoop]: === Iteration 4 === [build_nondet_StringErr3REQUIRES_VIOLATION, build_nondet_StringErr2REQUIRES_VIOLATION, build_nondet_StringErr1REQUIRES_VIOLATION, build_nondet_StringErr0REQUIRES_VIOLATION, cstrlenErr1REQUIRES_VIOLATION, cstrlenErr0REQUIRES_VIOLATION, mainErr0ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr3ENSURES_VIOLATIONMEMORY_LEAK, mainErr1ASSERT_VIOLATIONMEMORY_FREE]=== [2020-11-28 02:57:44,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:57:44,346 INFO L82 PathProgramCache]: Analyzing trace with hash 1978376014, now seen corresponding path program 1 times [2020-11-28 02:57:44,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:57:44,346 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252714795] [2020-11-28 02:57:44,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:57:44,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:57:44,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 02:57:44,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:57:44,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 02:57:44,474 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252714795] [2020-11-28 02:57:44,474 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 02:57:44,474 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 02:57:44,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990220627] [2020-11-28 02:57:44,475 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-28 02:57:44,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:57:44,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-28 02:57:44,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-28 02:57:44,476 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand 5 states. [2020-11-28 02:57:44,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:57:44,623 INFO L93 Difference]: Finished difference Result 47 states and 50 transitions. [2020-11-28 02:57:44,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-28 02:57:44,623 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2020-11-28 02:57:44,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 02:57:44,624 INFO L225 Difference]: With dead ends: 47 [2020-11-28 02:57:44,624 INFO L226 Difference]: Without dead ends: 47 [2020-11-28 02:57:44,625 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-11-28 02:57:44,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-11-28 02:57:44,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 41. [2020-11-28 02:57:44,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-11-28 02:57:44,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2020-11-28 02:57:44,630 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 11 [2020-11-28 02:57:44,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 02:57:44,630 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2020-11-28 02:57:44,630 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-28 02:57:44,630 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2020-11-28 02:57:44,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-28 02:57:44,631 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:57:44,631 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 02:57:44,631 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-28 02:57:44,631 INFO L429 AbstractCegarLoop]: === Iteration 5 === [build_nondet_StringErr3REQUIRES_VIOLATION, build_nondet_StringErr2REQUIRES_VIOLATION, build_nondet_StringErr1REQUIRES_VIOLATION, build_nondet_StringErr0REQUIRES_VIOLATION, cstrlenErr1REQUIRES_VIOLATION, cstrlenErr0REQUIRES_VIOLATION, mainErr0ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr3ENSURES_VIOLATIONMEMORY_LEAK, mainErr1ASSERT_VIOLATIONMEMORY_FREE]=== [2020-11-28 02:57:44,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:57:44,632 INFO L82 PathProgramCache]: Analyzing trace with hash 1295904273, now seen corresponding path program 1 times [2020-11-28 02:57:44,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:57:44,632 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910184813] [2020-11-28 02:57:44,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:57:44,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:57:44,729 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 02:57:44,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:57:44,735 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 02:57:44,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910184813] [2020-11-28 02:57:44,736 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773432909] [2020-11-28 02:57:44,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_741a9b7c-6523-4fad-9699-71cf69cb5922/bin/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 02:57:44,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:57:44,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-28 02:57:44,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 02:57:44,953 INFO L384 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 [2020-11-28 02:57:44,953 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-28 02:57:44,972 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-28 02:57:44,973 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-28 02:57:44,973 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2020-11-28 02:57:45,012 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 02:57:45,013 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 02:57:45,013 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2020-11-28 02:57:45,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751974697] [2020-11-28 02:57:45,013 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-28 02:57:45,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:57:45,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-28 02:57:45,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-11-28 02:57:45,015 INFO L87 Difference]: Start difference. First operand 41 states and 44 transitions. Second operand 7 states. [2020-11-28 02:57:45,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:57:45,169 INFO L93 Difference]: Finished difference Result 46 states and 49 transitions. [2020-11-28 02:57:45,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-28 02:57:45,169 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 15 [2020-11-28 02:57:45,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 02:57:45,170 INFO L225 Difference]: With dead ends: 46 [2020-11-28 02:57:45,170 INFO L226 Difference]: Without dead ends: 46 [2020-11-28 02:57:45,171 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-11-28 02:57:45,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-11-28 02:57:45,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 38. [2020-11-28 02:57:45,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-11-28 02:57:45,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2020-11-28 02:57:45,176 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 15 [2020-11-28 02:57:45,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 02:57:45,176 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2020-11-28 02:57:45,176 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-28 02:57:45,176 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2020-11-28 02:57:45,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-11-28 02:57:45,177 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:57:45,177 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 02:57:45,377 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 02:57:45,378 INFO L429 AbstractCegarLoop]: === Iteration 6 === [build_nondet_StringErr3REQUIRES_VIOLATION, build_nondet_StringErr2REQUIRES_VIOLATION, build_nondet_StringErr1REQUIRES_VIOLATION, build_nondet_StringErr0REQUIRES_VIOLATION, cstrlenErr1REQUIRES_VIOLATION, cstrlenErr0REQUIRES_VIOLATION, mainErr0ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr3ENSURES_VIOLATIONMEMORY_LEAK, mainErr1ASSERT_VIOLATIONMEMORY_FREE]=== [2020-11-28 02:57:45,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:57:45,378 INFO L82 PathProgramCache]: Analyzing trace with hash -77704130, now seen corresponding path program 1 times [2020-11-28 02:57:45,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:57:45,379 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628986823] [2020-11-28 02:57:45,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:57:45,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:57:45,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 02:57:45,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:57:45,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-11-28 02:57:45,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:57:45,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 02:57:45,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628986823] [2020-11-28 02:57:45,577 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 02:57:45,577 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-11-28 02:57:45,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423400125] [2020-11-28 02:57:45,578 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-28 02:57:45,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:57:45,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-28 02:57:45,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-11-28 02:57:45,579 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand 10 states. [2020-11-28 02:57:45,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:57:45,874 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2020-11-28 02:57:45,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-28 02:57:45,874 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2020-11-28 02:57:45,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 02:57:45,875 INFO L225 Difference]: With dead ends: 36 [2020-11-28 02:57:45,875 INFO L226 Difference]: Without dead ends: 36 [2020-11-28 02:57:45,876 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2020-11-28 02:57:45,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-11-28 02:57:45,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-11-28 02:57:45,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-11-28 02:57:45,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2020-11-28 02:57:45,880 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 18 [2020-11-28 02:57:45,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 02:57:45,880 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2020-11-28 02:57:45,880 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-28 02:57:45,881 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2020-11-28 02:57:45,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-11-28 02:57:45,881 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:57:45,881 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 02:57:45,881 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-28 02:57:45,882 INFO L429 AbstractCegarLoop]: === Iteration 7 === [build_nondet_StringErr3REQUIRES_VIOLATION, build_nondet_StringErr2REQUIRES_VIOLATION, build_nondet_StringErr1REQUIRES_VIOLATION, build_nondet_StringErr0REQUIRES_VIOLATION, cstrlenErr1REQUIRES_VIOLATION, cstrlenErr0REQUIRES_VIOLATION, mainErr0ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr3ENSURES_VIOLATIONMEMORY_LEAK, mainErr1ASSERT_VIOLATIONMEMORY_FREE]=== [2020-11-28 02:57:45,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:57:45,882 INFO L82 PathProgramCache]: Analyzing trace with hash -77704129, now seen corresponding path program 1 times [2020-11-28 02:57:45,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:57:45,883 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258565981] [2020-11-28 02:57:45,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:57:45,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:57:46,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 02:57:46,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:57:46,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-11-28 02:57:46,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:57:46,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 02:57:46,136 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258565981] [2020-11-28 02:57:46,136 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 02:57:46,137 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-11-28 02:57:46,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854426461] [2020-11-28 02:57:46,137 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-28 02:57:46,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:57:46,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-28 02:57:46,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-11-28 02:57:46,138 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 11 states. [2020-11-28 02:57:46,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:57:46,519 INFO L93 Difference]: Finished difference Result 40 states and 43 transitions. [2020-11-28 02:57:46,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-28 02:57:46,520 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 18 [2020-11-28 02:57:46,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 02:57:46,521 INFO L225 Difference]: With dead ends: 40 [2020-11-28 02:57:46,521 INFO L226 Difference]: Without dead ends: 40 [2020-11-28 02:57:46,521 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2020-11-28 02:57:46,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-11-28 02:57:46,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 36. [2020-11-28 02:57:46,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-11-28 02:57:46,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2020-11-28 02:57:46,525 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 18 [2020-11-28 02:57:46,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 02:57:46,526 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2020-11-28 02:57:46,526 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-28 02:57:46,526 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2020-11-28 02:57:46,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-11-28 02:57:46,526 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:57:46,526 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 02:57:46,527 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-11-28 02:57:46,527 INFO L429 AbstractCegarLoop]: === Iteration 8 === [build_nondet_StringErr3REQUIRES_VIOLATION, build_nondet_StringErr2REQUIRES_VIOLATION, build_nondet_StringErr1REQUIRES_VIOLATION, build_nondet_StringErr0REQUIRES_VIOLATION, cstrlenErr1REQUIRES_VIOLATION, cstrlenErr0REQUIRES_VIOLATION, mainErr0ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr3ENSURES_VIOLATIONMEMORY_LEAK, mainErr1ASSERT_VIOLATIONMEMORY_FREE]=== [2020-11-28 02:57:46,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:57:46,527 INFO L82 PathProgramCache]: Analyzing trace with hash -1659223880, now seen corresponding path program 1 times [2020-11-28 02:57:46,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:57:46,528 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133016599] [2020-11-28 02:57:46,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:57:46,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:57:46,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 02:57:46,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:57:46,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-11-28 02:57:46,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:57:46,816 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 02:57:46,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133016599] [2020-11-28 02:57:46,816 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 02:57:46,816 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-11-28 02:57:46,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112984782] [2020-11-28 02:57:46,817 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-28 02:57:46,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:57:46,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-28 02:57:46,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2020-11-28 02:57:46,818 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 13 states. [2020-11-28 02:57:47,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:57:47,250 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2020-11-28 02:57:47,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-28 02:57:47,250 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 20 [2020-11-28 02:57:47,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 02:57:47,251 INFO L225 Difference]: With dead ends: 55 [2020-11-28 02:57:47,252 INFO L226 Difference]: Without dead ends: 55 [2020-11-28 02:57:47,252 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-11-28 02:57:47,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-11-28 02:57:47,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 48. [2020-11-28 02:57:47,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-11-28 02:57:47,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2020-11-28 02:57:47,258 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 20 [2020-11-28 02:57:47,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 02:57:47,258 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2020-11-28 02:57:47,258 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-11-28 02:57:47,259 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2020-11-28 02:57:47,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-11-28 02:57:47,259 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:57:47,259 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 02:57:47,260 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-11-28 02:57:47,260 INFO L429 AbstractCegarLoop]: === Iteration 9 === [build_nondet_StringErr3REQUIRES_VIOLATION, build_nondet_StringErr2REQUIRES_VIOLATION, build_nondet_StringErr1REQUIRES_VIOLATION, build_nondet_StringErr0REQUIRES_VIOLATION, cstrlenErr1REQUIRES_VIOLATION, cstrlenErr0REQUIRES_VIOLATION, mainErr0ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr3ENSURES_VIOLATIONMEMORY_LEAK, mainErr1ASSERT_VIOLATIONMEMORY_FREE]=== [2020-11-28 02:57:47,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:57:47,260 INFO L82 PathProgramCache]: Analyzing trace with hash 2048937402, now seen corresponding path program 1 times [2020-11-28 02:57:47,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:57:47,261 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874776750] [2020-11-28 02:57:47,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:57:47,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:57:47,334 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 02:57:47,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:57:47,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-11-28 02:57:47,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:57:47,529 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 02:57:47,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874776750] [2020-11-28 02:57:47,529 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 02:57:47,530 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-11-28 02:57:47,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693131391] [2020-11-28 02:57:47,530 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-28 02:57:47,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:57:47,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-28 02:57:47,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2020-11-28 02:57:47,531 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand 14 states. [2020-11-28 02:57:48,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:57:48,041 INFO L93 Difference]: Finished difference Result 71 states and 73 transitions. [2020-11-28 02:57:48,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-11-28 02:57:48,042 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 20 [2020-11-28 02:57:48,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 02:57:48,044 INFO L225 Difference]: With dead ends: 71 [2020-11-28 02:57:48,044 INFO L226 Difference]: Without dead ends: 71 [2020-11-28 02:57:48,046 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2020-11-28 02:57:48,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-11-28 02:57:48,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 49. [2020-11-28 02:57:48,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-11-28 02:57:48,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 52 transitions. [2020-11-28 02:57:48,051 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 52 transitions. Word has length 20 [2020-11-28 02:57:48,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 02:57:48,051 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 52 transitions. [2020-11-28 02:57:48,051 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-11-28 02:57:48,052 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 52 transitions. [2020-11-28 02:57:48,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-11-28 02:57:48,058 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:57:48,058 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 02:57:48,058 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-11-28 02:57:48,058 INFO L429 AbstractCegarLoop]: === Iteration 10 === [build_nondet_StringErr3REQUIRES_VIOLATION, build_nondet_StringErr2REQUIRES_VIOLATION, build_nondet_StringErr1REQUIRES_VIOLATION, build_nondet_StringErr0REQUIRES_VIOLATION, cstrlenErr1REQUIRES_VIOLATION, cstrlenErr0REQUIRES_VIOLATION, mainErr0ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr3ENSURES_VIOLATIONMEMORY_LEAK, mainErr1ASSERT_VIOLATIONMEMORY_FREE]=== [2020-11-28 02:57:48,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:57:48,059 INFO L82 PathProgramCache]: Analyzing trace with hash 863431255, now seen corresponding path program 1 times [2020-11-28 02:57:48,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:57:48,059 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193566170] [2020-11-28 02:57:48,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:57:48,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 02:57:48,087 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 02:57:48,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 02:57:48,113 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 02:57:48,145 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-28 02:57:48,146 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-28 02:57:48,146 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-11-28 02:57:48,170 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 02:57:48 BoogieIcfgContainer [2020-11-28 02:57:48,171 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-28 02:57:48,171 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-28 02:57:48,171 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-28 02:57:48,171 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-28 02:57:48,172 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 02:57:43" (3/4) ... [2020-11-28 02:57:48,173 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-28 02:57:48,213 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_741a9b7c-6523-4fad-9699-71cf69cb5922/bin/uautomizer/witness.graphml [2020-11-28 02:57:48,213 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-28 02:57:48,214 INFO L168 Benchmark]: Toolchain (without parser) took 6417.61 ms. Allocated memory was 94.4 MB in the beginning and 136.3 MB in the end (delta: 41.9 MB). Free memory was 60.0 MB in the beginning and 59.9 MB in the end (delta: 131.1 kB). Peak memory consumption was 41.5 MB. Max. memory is 16.1 GB. [2020-11-28 02:57:48,215 INFO L168 Benchmark]: CDTParser took 0.99 ms. Allocated memory is still 73.4 MB. Free memory was 48.5 MB in the beginning and 48.5 MB in the end (delta: 29.3 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 02:57:48,215 INFO L168 Benchmark]: CACSL2BoogieTranslator took 613.61 ms. Allocated memory is still 94.4 MB. Free memory was 59.8 MB in the beginning and 60.4 MB in the end (delta: -614.5 kB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-11-28 02:57:48,216 INFO L168 Benchmark]: Boogie Preprocessor took 110.02 ms. Allocated memory is still 94.4 MB. Free memory was 60.4 MB in the beginning and 58.3 MB in the end (delta: 2.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 02:57:48,217 INFO L168 Benchmark]: RCFGBuilder took 660.04 ms. Allocated memory is still 94.4 MB. Free memory was 58.3 MB in the beginning and 55.0 MB in the end (delta: 3.3 MB). Peak memory consumption was 27.5 MB. Max. memory is 16.1 GB. [2020-11-28 02:57:48,217 INFO L168 Benchmark]: TraceAbstraction took 4986.37 ms. Allocated memory was 94.4 MB in the beginning and 136.3 MB in the end (delta: 41.9 MB). Free memory was 55.0 MB in the beginning and 62.0 MB in the end (delta: -7.0 MB). Peak memory consumption was 35.5 MB. Max. memory is 16.1 GB. [2020-11-28 02:57:48,218 INFO L168 Benchmark]: Witness Printer took 42.08 ms. Allocated memory is still 136.3 MB. Free memory was 62.0 MB in the beginning and 59.9 MB in the end (delta: 2.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 02:57:48,221 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.99 ms. Allocated memory is still 73.4 MB. Free memory was 48.5 MB in the beginning and 48.5 MB in the end (delta: 29.3 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 613.61 ms. Allocated memory is still 94.4 MB. Free memory was 59.8 MB in the beginning and 60.4 MB in the end (delta: -614.5 kB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 110.02 ms. Allocated memory is still 94.4 MB. Free memory was 60.4 MB in the beginning and 58.3 MB in the end (delta: 2.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 660.04 ms. Allocated memory is still 94.4 MB. Free memory was 58.3 MB in the beginning and 55.0 MB in the end (delta: 3.3 MB). Peak memory consumption was 27.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 4986.37 ms. Allocated memory was 94.4 MB in the beginning and 136.3 MB in the end (delta: 41.9 MB). Free memory was 55.0 MB in the beginning and 62.0 MB in the end (delta: -7.0 MB). Peak memory consumption was 35.5 MB. Max. memory is 16.1 GB. * Witness Printer took 42.08 ms. Allocated memory is still 136.3 MB. Free memory was 62.0 MB in the beginning and 59.9 MB in the end (delta: 2.1 MB). There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 532]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L537] CALL, EXPR build_nondet_String() [L515] int length = __VERIFIER_nondet_int(); [L516] COND FALSE !(length < 1) VAL [length=2] [L519] char* nondetString = (char*) malloc(length * sizeof(char)); [L521] int i = 0; VAL [i=0, length=2, malloc(length * sizeof(char))={-1:0}, nondetString={-1:0}] [L521] COND TRUE i < length - 1 [L523] nondetString[i] = __VERIFIER_nondet_char() VAL [__VERIFIER_nondet_char()=-2, i=0, length=2, malloc(length * sizeof(char))={-1:0}, nondetString={-1:0}] [L521] i++ VAL [i=1, length=2, malloc(length * sizeof(char))={-1:0}, nondetString={-1:0}] [L521] COND FALSE !(i < length - 1) VAL [i=1, length=2, malloc(length * sizeof(char))={-1:0}, nondetString={-1:0}] [L526] nondetString[length-1] = '\0' VAL [i=1, length=2, malloc(length * sizeof(char))={-1:0}, nondetString={-1:0}] [L527] return nondetString; VAL [\result={-1:0}, i=1, length=2, malloc(length * sizeof(char))={-1:0}, nondetString={-1:0}] [L537] RET, EXPR build_nondet_String() VAL [build_nondet_String()={-1:0}] [L537] char* p = build_nondet_String(); [L538] CALL cstrlen(p) VAL [s={-1:0}] [L531] const char *p = s; VAL [p={-1:0}, s={-1:0}, s={-1:0}] [L532] EXPR \read(*p) VAL [\read(*p)=-2, p={-1:0}, s={-1:0}, s={-1:0}] [L532] COND TRUE *p != '\0' [L533] p = p+2 VAL [p={-1:2}, s={-1:0}, s={-1:0}] [L532] \read(*p) - StatisticsResult: Ultimate Automizer benchmark data CFG has 10 procedures, 58 locations, 10 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 4.9s, OverallIterations: 10, TraceHistogramMax: 2, AutomataDifference: 2.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 232 SDtfs, 341 SDslu, 455 SDs, 0 SdLazy, 1200 SolverSat, 74 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 126 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 1.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=49occurred in iteration=9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 9 MinimizatonAttempts, 51 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.4s InterpolantComputationTime, 174 NumberOfCodeBlocks, 174 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 140 ConstructedInterpolants, 0 QuantifiedInterpolants, 11040 SizeOfPredicates, 3 NumberOfNonLiveVariables, 69 ConjunctsInSsa, 11 ConjunctsInUnsatCore, 10 InterpolantComputations, 8 PerfectInterpolantSequences, 3/6 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 RESULT: Ultimate proved your program to be incorrect! Received shutdown request...