./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/cstrchr_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_62dccf98-19de-490c-bcb2-cd92ff8c79d4/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_62dccf98-19de-490c-bcb2-cd92ff8c79d4/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_62dccf98-19de-490c-bcb2-cd92ff8c79d4/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_62dccf98-19de-490c-bcb2-cd92ff8c79d4/bin/uautomizer/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/cstrchr_unsafe.i -s /tmp/vcloud-vcloud-master/worker/run_dir_62dccf98-19de-490c-bcb2-cd92ff8c79d4/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_62dccf98-19de-490c-bcb2-cd92ff8c79d4/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 efc45e5708d4a9b560055cd5abf7b168f9024833 .......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 [2020-11-29 18:52:40,812 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-29 18:52:40,815 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-29 18:52:40,894 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-29 18:52:40,911 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-29 18:52:40,913 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-29 18:52:40,915 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-29 18:52:40,918 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-29 18:52:40,922 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-29 18:52:40,924 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-29 18:52:40,925 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-29 18:52:40,927 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-29 18:52:40,928 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-29 18:52:40,930 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-29 18:52:40,932 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-29 18:52:40,934 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-29 18:52:40,935 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-29 18:52:40,937 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-29 18:52:40,940 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-29 18:52:40,944 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-29 18:52:40,946 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-29 18:52:40,948 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-29 18:52:40,950 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-29 18:52:40,952 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-29 18:52:40,957 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-29 18:52:40,957 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-29 18:52:40,958 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-29 18:52:40,960 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-29 18:52:40,960 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-29 18:52:40,962 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-29 18:52:40,962 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-29 18:52:40,964 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-29 18:52:40,965 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-29 18:52:40,966 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-29 18:52:40,968 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-29 18:52:40,968 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-29 18:52:40,969 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-29 18:52:40,969 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-29 18:52:40,970 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-29 18:52:40,971 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-29 18:52:40,972 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-29 18:52:40,973 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_62dccf98-19de-490c-bcb2-cd92ff8c79d4/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2020-11-29 18:52:41,003 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-29 18:52:41,003 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-29 18:52:41,005 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-29 18:52:41,005 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-29 18:52:41,005 INFO L138 SettingsManager]: * Use SBE=true [2020-11-29 18:52:41,006 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-29 18:52:41,006 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-29 18:52:41,006 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-11-29 18:52:41,007 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-29 18:52:41,007 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-29 18:52:41,007 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-29 18:52:41,007 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-11-29 18:52:41,008 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-11-29 18:52:41,008 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-11-29 18:52:41,008 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-29 18:52:41,008 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-29 18:52:41,009 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-29 18:52:41,009 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-29 18:52:41,009 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-29 18:52:41,010 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-29 18:52:41,010 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-29 18:52:41,010 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-29 18:52:41,010 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-29 18:52:41,011 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-29 18:52:41,011 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-29 18:52:41,011 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-29 18:52:41,011 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-29 18:52:41,012 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-29 18:52:41,012 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_62dccf98-19de-490c-bcb2-cd92ff8c79d4/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_62dccf98-19de-490c-bcb2-cd92ff8c79d4/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> efc45e5708d4a9b560055cd5abf7b168f9024833 [2020-11-29 18:52:41,269 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-29 18:52:41,293 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-29 18:52:41,296 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-29 18:52:41,298 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-29 18:52:41,299 INFO L275 PluginConnector]: CDTParser initialized [2020-11-29 18:52:41,300 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_62dccf98-19de-490c-bcb2-cd92ff8c79d4/bin/uautomizer/../../sv-benchmarks/c/array-memsafety/cstrchr_unsafe.i [2020-11-29 18:52:41,393 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_62dccf98-19de-490c-bcb2-cd92ff8c79d4/bin/uautomizer/data/5b3a8b480/cdb66e56b31a47d8bed7133aa7ecad25/FLAG99b908664 [2020-11-29 18:52:41,952 INFO L306 CDTParser]: Found 1 translation units. [2020-11-29 18:52:41,952 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_62dccf98-19de-490c-bcb2-cd92ff8c79d4/sv-benchmarks/c/array-memsafety/cstrchr_unsafe.i [2020-11-29 18:52:41,966 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_62dccf98-19de-490c-bcb2-cd92ff8c79d4/bin/uautomizer/data/5b3a8b480/cdb66e56b31a47d8bed7133aa7ecad25/FLAG99b908664 [2020-11-29 18:52:42,235 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_62dccf98-19de-490c-bcb2-cd92ff8c79d4/bin/uautomizer/data/5b3a8b480/cdb66e56b31a47d8bed7133aa7ecad25 [2020-11-29 18:52:42,238 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-29 18:52:42,240 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-11-29 18:52:42,256 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-29 18:52:42,256 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-29 18:52:42,259 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-29 18:52:42,260 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 06:52:42" (1/1) ... [2020-11-29 18:52:42,262 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@164dff5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:52:42, skipping insertion in model container [2020-11-29 18:52:42,262 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 06:52:42" (1/1) ... [2020-11-29 18:52:42,271 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-29 18:52:42,317 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-29 18:52:42,735 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 18:52:42,742 INFO L203 MainTranslator]: Completed pre-run [2020-11-29 18:52:42,795 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 18:52:42,859 INFO L208 MainTranslator]: Completed translation [2020-11-29 18:52:42,860 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:52:42 WrapperNode [2020-11-29 18:52:42,861 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-29 18:52:42,862 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-29 18:52:42,862 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-29 18:52:42,862 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-29 18:52:42,875 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:52:42" (1/1) ... [2020-11-29 18:52:42,876 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:52:42" (1/1) ... [2020-11-29 18:52:42,910 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:52:42" (1/1) ... [2020-11-29 18:52:42,912 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:52:42" (1/1) ... [2020-11-29 18:52:42,940 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:52:42" (1/1) ... [2020-11-29 18:52:42,960 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:52:42" (1/1) ... [2020-11-29 18:52:42,964 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:52:42" (1/1) ... [2020-11-29 18:52:42,976 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-29 18:52:42,983 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-29 18:52:42,984 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-29 18:52:42,984 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-29 18:52:42,985 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:52:42" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_62dccf98-19de-490c-bcb2-cd92ff8c79d4/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 [2020-11-29 18:52:43,077 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-29 18:52:43,077 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-29 18:52:43,077 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-11-29 18:52:43,077 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-11-29 18:52:43,078 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2020-11-29 18:52:43,078 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2020-11-29 18:52:43,079 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2020-11-29 18:52:43,079 INFO L138 BoogieDeclarations]: Found implementation of procedure build_nondet_String [2020-11-29 18:52:43,080 INFO L138 BoogieDeclarations]: Found implementation of procedure cstrchr [2020-11-29 18:52:43,080 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-29 18:52:43,081 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-11-29 18:52:43,081 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-11-29 18:52:43,082 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-11-29 18:52:43,082 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-11-29 18:52:43,082 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-11-29 18:52:43,082 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-11-29 18:52:43,083 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-11-29 18:52:43,083 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-11-29 18:52:43,083 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-11-29 18:52:43,084 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-11-29 18:52:43,084 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-11-29 18:52:43,084 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-11-29 18:52:43,084 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-11-29 18:52:43,084 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-11-29 18:52:43,084 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-11-29 18:52:43,084 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-11-29 18:52:43,085 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-11-29 18:52:43,085 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-11-29 18:52:43,085 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2020-11-29 18:52:43,085 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2020-11-29 18:52:43,085 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2020-11-29 18:52:43,085 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-11-29 18:52:43,085 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-11-29 18:52:43,086 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-11-29 18:52:43,086 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-11-29 18:52:43,086 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-11-29 18:52:43,086 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-11-29 18:52:43,086 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-11-29 18:52:43,086 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-11-29 18:52:43,086 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-11-29 18:52:43,087 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-11-29 18:52:43,087 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-11-29 18:52:43,087 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-11-29 18:52:43,087 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-11-29 18:52:43,087 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-11-29 18:52:43,087 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-11-29 18:52:43,087 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-11-29 18:52:43,088 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-11-29 18:52:43,088 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-11-29 18:52:43,088 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-11-29 18:52:43,088 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-11-29 18:52:43,089 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-11-29 18:52:43,089 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-11-29 18:52:43,089 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-11-29 18:52:43,089 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-11-29 18:52:43,089 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-11-29 18:52:43,089 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-11-29 18:52:43,090 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-11-29 18:52:43,091 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-11-29 18:52:43,091 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-11-29 18:52:43,091 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-11-29 18:52:43,091 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-11-29 18:52:43,092 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-11-29 18:52:43,092 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-11-29 18:52:43,092 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-11-29 18:52:43,092 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-11-29 18:52:43,092 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-11-29 18:52:43,092 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-11-29 18:52:43,092 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-11-29 18:52:43,093 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-11-29 18:52:43,093 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-11-29 18:52:43,094 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-11-29 18:52:43,096 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-11-29 18:52:43,096 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-29 18:52:43,096 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-11-29 18:52:43,097 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-11-29 18:52:43,097 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-11-29 18:52:43,097 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-11-29 18:52:43,097 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-11-29 18:52:43,097 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-11-29 18:52:43,097 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-11-29 18:52:43,097 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-11-29 18:52:43,098 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-11-29 18:52:43,098 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-11-29 18:52:43,098 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-11-29 18:52:43,098 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-11-29 18:52:43,098 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-11-29 18:52:43,099 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-11-29 18:52:43,099 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-11-29 18:52:43,100 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-11-29 18:52:43,100 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-11-29 18:52:43,100 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-11-29 18:52:43,100 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-11-29 18:52:43,100 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-11-29 18:52:43,100 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-11-29 18:52:43,101 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-11-29 18:52:43,101 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-11-29 18:52:43,101 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-11-29 18:52:43,101 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-11-29 18:52:43,101 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-11-29 18:52:43,101 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-11-29 18:52:43,101 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-11-29 18:52:43,101 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-11-29 18:52:43,102 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-11-29 18:52:43,102 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-11-29 18:52:43,102 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-11-29 18:52:43,102 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-11-29 18:52:43,102 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-11-29 18:52:43,102 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-11-29 18:52:43,102 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-11-29 18:52:43,103 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-11-29 18:52:43,103 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-11-29 18:52:43,103 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-11-29 18:52:43,103 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-11-29 18:52:43,103 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-11-29 18:52:43,104 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-11-29 18:52:43,104 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-11-29 18:52:43,104 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-11-29 18:52:43,105 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-11-29 18:52:43,105 INFO L130 BoogieDeclarations]: Found specification of procedure build_nondet_String [2020-11-29 18:52:43,106 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-11-29 18:52:43,106 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-29 18:52:43,106 INFO L130 BoogieDeclarations]: Found specification of procedure cstrchr [2020-11-29 18:52:43,106 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-29 18:52:43,106 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-29 18:52:43,106 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-29 18:52:43,107 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-29 18:52:43,107 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-29 18:52:43,852 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-29 18:52:43,853 INFO L298 CfgBuilder]: Removed 2 assume(true) statements. [2020-11-29 18:52:43,856 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 06:52:43 BoogieIcfgContainer [2020-11-29 18:52:43,857 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-29 18:52:43,864 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-29 18:52:43,865 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-29 18:52:43,869 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-29 18:52:43,869 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 06:52:42" (1/3) ... [2020-11-29 18:52:43,870 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7915d36f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 06:52:43, skipping insertion in model container [2020-11-29 18:52:43,871 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:52:42" (2/3) ... [2020-11-29 18:52:43,872 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7915d36f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 06:52:43, skipping insertion in model container [2020-11-29 18:52:43,872 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 06:52:43" (3/3) ... [2020-11-29 18:52:43,875 INFO L111 eAbstractionObserver]: Analyzing ICFG cstrchr_unsafe.i [2020-11-29 18:52:43,888 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-29 18:52:43,894 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 16 error locations. [2020-11-29 18:52:43,909 INFO L253 AbstractCegarLoop]: Starting to check reachability of 16 error locations. [2020-11-29 18:52:43,956 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-29 18:52:43,956 INFO L378 AbstractCegarLoop]: Hoare is false [2020-11-29 18:52:43,956 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-29 18:52:43,956 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-29 18:52:43,956 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-29 18:52:43,957 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-29 18:52:43,957 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-29 18:52:43,957 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-29 18:52:43,978 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states. [2020-11-29 18:52:43,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-29 18:52:43,989 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 18:52:43,990 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 18:52:43,991 INFO L429 AbstractCegarLoop]: === Iteration 1 === [build_nondet_StringErr3REQUIRES_VIOLATION, build_nondet_StringErr2REQUIRES_VIOLATION, build_nondet_StringErr1REQUIRES_VIOLATION, build_nondet_StringErr0REQUIRES_VIOLATION, cstrchrErr0REQUIRES_VIOLATION, cstrchrErr5REQUIRES_VIOLATION, cstrchrErr1REQUIRES_VIOLATION, cstrchrErr3REQUIRES_VIOLATION, cstrchrErr2REQUIRES_VIOLATION, cstrchrErr4REQUIRES_VIOLATION, mainErr3ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr5ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION]=== [2020-11-29 18:52:44,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:52:44,000 INFO L82 PathProgramCache]: Analyzing trace with hash 1524183926, now seen corresponding path program 1 times [2020-11-29 18:52:44,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:52:44,011 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873260984] [2020-11-29 18:52:44,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:52:44,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:52:44,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 18:52:44,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:52:44,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 18:52:44,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873260984] [2020-11-29 18:52:44,178 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 18:52:44,178 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-29 18:52:44,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625069112] [2020-11-29 18:52:44,183 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-29 18:52:44,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 18:52:44,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-29 18:52:44,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-29 18:52:44,203 INFO L87 Difference]: Start difference. First operand 56 states. Second operand 3 states. [2020-11-29 18:52:44,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 18:52:44,371 INFO L93 Difference]: Finished difference Result 56 states and 60 transitions. [2020-11-29 18:52:44,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-29 18:52:44,373 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2020-11-29 18:52:44,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 18:52:44,384 INFO L225 Difference]: With dead ends: 56 [2020-11-29 18:52:44,384 INFO L226 Difference]: Without dead ends: 53 [2020-11-29 18:52:44,386 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-29 18:52:44,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-11-29 18:52:44,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-11-29 18:52:44,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-11-29 18:52:44,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 57 transitions. [2020-11-29 18:52:44,430 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 57 transitions. Word has length 11 [2020-11-29 18:52:44,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 18:52:44,431 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 57 transitions. [2020-11-29 18:52:44,431 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-29 18:52:44,431 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 57 transitions. [2020-11-29 18:52:44,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-29 18:52:44,432 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 18:52:44,432 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 18:52:44,433 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-29 18:52:44,433 INFO L429 AbstractCegarLoop]: === Iteration 2 === [build_nondet_StringErr3REQUIRES_VIOLATION, build_nondet_StringErr2REQUIRES_VIOLATION, build_nondet_StringErr1REQUIRES_VIOLATION, build_nondet_StringErr0REQUIRES_VIOLATION, cstrchrErr0REQUIRES_VIOLATION, cstrchrErr5REQUIRES_VIOLATION, cstrchrErr1REQUIRES_VIOLATION, cstrchrErr3REQUIRES_VIOLATION, cstrchrErr2REQUIRES_VIOLATION, cstrchrErr4REQUIRES_VIOLATION, mainErr3ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr5ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION]=== [2020-11-29 18:52:44,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:52:44,434 INFO L82 PathProgramCache]: Analyzing trace with hash 1524183616, now seen corresponding path program 1 times [2020-11-29 18:52:44,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:52:44,435 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934468480] [2020-11-29 18:52:44,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:52:44,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:52:44,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 18:52:44,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:52:44,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 18:52:44,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934468480] [2020-11-29 18:52:44,577 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 18:52:44,577 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-29 18:52:44,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981171972] [2020-11-29 18:52:44,579 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-29 18:52:44,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 18:52:44,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 18:52:44,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-29 18:52:44,583 INFO L87 Difference]: Start difference. First operand 53 states and 57 transitions. Second operand 4 states. [2020-11-29 18:52:44,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 18:52:44,807 INFO L93 Difference]: Finished difference Result 51 states and 55 transitions. [2020-11-29 18:52:44,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-29 18:52:44,807 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2020-11-29 18:52:44,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 18:52:44,809 INFO L225 Difference]: With dead ends: 51 [2020-11-29 18:52:44,809 INFO L226 Difference]: Without dead ends: 51 [2020-11-29 18:52:44,810 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 [2020-11-29 18:52:44,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-11-29 18:52:44,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-11-29 18:52:44,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-11-29 18:52:44,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2020-11-29 18:52:44,819 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 11 [2020-11-29 18:52:44,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 18:52:44,820 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2020-11-29 18:52:44,820 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-29 18:52:44,820 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2020-11-29 18:52:44,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-29 18:52:44,821 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 18:52:44,821 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 18:52:44,821 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-29 18:52:44,822 INFO L429 AbstractCegarLoop]: === Iteration 3 === [build_nondet_StringErr3REQUIRES_VIOLATION, build_nondet_StringErr2REQUIRES_VIOLATION, build_nondet_StringErr1REQUIRES_VIOLATION, build_nondet_StringErr0REQUIRES_VIOLATION, cstrchrErr0REQUIRES_VIOLATION, cstrchrErr5REQUIRES_VIOLATION, cstrchrErr1REQUIRES_VIOLATION, cstrchrErr3REQUIRES_VIOLATION, cstrchrErr2REQUIRES_VIOLATION, cstrchrErr4REQUIRES_VIOLATION, mainErr3ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr5ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION]=== [2020-11-29 18:52:44,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:52:44,823 INFO L82 PathProgramCache]: Analyzing trace with hash 1524183617, now seen corresponding path program 1 times [2020-11-29 18:52:44,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:52:44,823 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093104030] [2020-11-29 18:52:44,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:52:44,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:52:44,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 18:52:44,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:52:44,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 18:52:44,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093104030] [2020-11-29 18:52:44,979 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 18:52:44,979 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-29 18:52:44,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802958054] [2020-11-29 18:52:44,980 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-29 18:52:44,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 18:52:44,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-29 18:52:44,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-11-29 18:52:44,982 INFO L87 Difference]: Start difference. First operand 51 states and 55 transitions. Second operand 5 states. [2020-11-29 18:52:45,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 18:52:45,135 INFO L93 Difference]: Finished difference Result 50 states and 54 transitions. [2020-11-29 18:52:45,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-29 18:52:45,136 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2020-11-29 18:52:45,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 18:52:45,137 INFO L225 Difference]: With dead ends: 50 [2020-11-29 18:52:45,138 INFO L226 Difference]: Without dead ends: 50 [2020-11-29 18:52:45,138 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 [2020-11-29 18:52:45,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-11-29 18:52:45,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2020-11-29 18:52:45,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-11-29 18:52:45,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2020-11-29 18:52:45,146 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 11 [2020-11-29 18:52:45,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 18:52:45,146 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2020-11-29 18:52:45,146 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-29 18:52:45,146 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2020-11-29 18:52:45,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-29 18:52:45,147 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 18:52:45,147 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 18:52:45,148 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-29 18:52:45,148 INFO L429 AbstractCegarLoop]: === Iteration 4 === [build_nondet_StringErr3REQUIRES_VIOLATION, build_nondet_StringErr2REQUIRES_VIOLATION, build_nondet_StringErr1REQUIRES_VIOLATION, build_nondet_StringErr0REQUIRES_VIOLATION, cstrchrErr0REQUIRES_VIOLATION, cstrchrErr5REQUIRES_VIOLATION, cstrchrErr1REQUIRES_VIOLATION, cstrchrErr3REQUIRES_VIOLATION, cstrchrErr2REQUIRES_VIOLATION, cstrchrErr4REQUIRES_VIOLATION, mainErr3ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr5ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION]=== [2020-11-29 18:52:45,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:52:45,149 INFO L82 PathProgramCache]: Analyzing trace with hash 1524183670, now seen corresponding path program 1 times [2020-11-29 18:52:45,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:52:45,149 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004900348] [2020-11-29 18:52:45,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:52:45,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:52:45,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 18:52:45,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:52:45,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 18:52:45,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004900348] [2020-11-29 18:52:45,263 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 18:52:45,263 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-29 18:52:45,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015612195] [2020-11-29 18:52:45,264 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-29 18:52:45,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 18:52:45,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-29 18:52:45,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-11-29 18:52:45,266 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand 5 states. [2020-11-29 18:52:45,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 18:52:45,440 INFO L93 Difference]: Finished difference Result 56 states and 60 transitions. [2020-11-29 18:52:45,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-29 18:52:45,440 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2020-11-29 18:52:45,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 18:52:45,444 INFO L225 Difference]: With dead ends: 56 [2020-11-29 18:52:45,444 INFO L226 Difference]: Without dead ends: 56 [2020-11-29 18:52:45,444 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 [2020-11-29 18:52:45,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-11-29 18:52:45,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 52. [2020-11-29 18:52:45,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-11-29 18:52:45,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 56 transitions. [2020-11-29 18:52:45,452 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 56 transitions. Word has length 11 [2020-11-29 18:52:45,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 18:52:45,453 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 56 transitions. [2020-11-29 18:52:45,453 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-29 18:52:45,453 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 56 transitions. [2020-11-29 18:52:45,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-29 18:52:45,454 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 18:52:45,454 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 18:52:45,454 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-29 18:52:45,454 INFO L429 AbstractCegarLoop]: === Iteration 5 === [build_nondet_StringErr3REQUIRES_VIOLATION, build_nondet_StringErr2REQUIRES_VIOLATION, build_nondet_StringErr1REQUIRES_VIOLATION, build_nondet_StringErr0REQUIRES_VIOLATION, cstrchrErr0REQUIRES_VIOLATION, cstrchrErr5REQUIRES_VIOLATION, cstrchrErr1REQUIRES_VIOLATION, cstrchrErr3REQUIRES_VIOLATION, cstrchrErr2REQUIRES_VIOLATION, cstrchrErr4REQUIRES_VIOLATION, mainErr3ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr5ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION]=== [2020-11-29 18:52:45,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:52:45,455 INFO L82 PathProgramCache]: Analyzing trace with hash 1524243252, now seen corresponding path program 1 times [2020-11-29 18:52:45,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:52:45,456 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573757817] [2020-11-29 18:52:45,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:52:45,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:52:45,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 18:52:45,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:52:45,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 18:52:45,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573757817] [2020-11-29 18:52:45,547 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 18:52:45,547 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-29 18:52:45,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975659403] [2020-11-29 18:52:45,548 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-29 18:52:45,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 18:52:45,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-29 18:52:45,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-29 18:52:45,549 INFO L87 Difference]: Start difference. First operand 52 states and 56 transitions. Second operand 5 states. [2020-11-29 18:52:45,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 18:52:45,781 INFO L93 Difference]: Finished difference Result 60 states and 65 transitions. [2020-11-29 18:52:45,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-29 18:52:45,781 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2020-11-29 18:52:45,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 18:52:45,782 INFO L225 Difference]: With dead ends: 60 [2020-11-29 18:52:45,783 INFO L226 Difference]: Without dead ends: 60 [2020-11-29 18:52:45,783 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 [2020-11-29 18:52:45,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-11-29 18:52:45,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 54. [2020-11-29 18:52:45,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-11-29 18:52:45,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 59 transitions. [2020-11-29 18:52:45,789 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 59 transitions. Word has length 11 [2020-11-29 18:52:45,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 18:52:45,789 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 59 transitions. [2020-11-29 18:52:45,789 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-29 18:52:45,790 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 59 transitions. [2020-11-29 18:52:45,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-29 18:52:45,790 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 18:52:45,790 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 18:52:45,791 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-29 18:52:45,791 INFO L429 AbstractCegarLoop]: === Iteration 6 === [build_nondet_StringErr3REQUIRES_VIOLATION, build_nondet_StringErr2REQUIRES_VIOLATION, build_nondet_StringErr1REQUIRES_VIOLATION, build_nondet_StringErr0REQUIRES_VIOLATION, cstrchrErr0REQUIRES_VIOLATION, cstrchrErr5REQUIRES_VIOLATION, cstrchrErr1REQUIRES_VIOLATION, cstrchrErr3REQUIRES_VIOLATION, cstrchrErr2REQUIRES_VIOLATION, cstrchrErr4REQUIRES_VIOLATION, mainErr3ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr5ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION]=== [2020-11-29 18:52:45,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:52:45,791 INFO L82 PathProgramCache]: Analyzing trace with hash -583933833, now seen corresponding path program 1 times [2020-11-29 18:52:45,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:52:45,792 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303280500] [2020-11-29 18:52:45,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:52:45,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:52:45,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 18:52:45,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:52:45,918 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 18:52:45,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303280500] [2020-11-29 18:52:45,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586417818] [2020-11-29 18:52:45,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_62dccf98-19de-490c-bcb2-cd92ff8c79d4/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 [2020-11-29 18:52:46,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:52:46,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-29 18:52:46,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:52:46,169 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 [2020-11-29 18:52:46,169 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 18:52:46,259 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 18:52:46,260 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-29 18:52:46,260 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2020-11-29 18:52:46,299 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 18:52:46,300 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 18:52:46,300 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2020-11-29 18:52:46,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509037432] [2020-11-29 18:52:46,300 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-29 18:52:46,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 18:52:46,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-29 18:52:46,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-11-29 18:52:46,302 INFO L87 Difference]: Start difference. First operand 54 states and 59 transitions. Second operand 7 states. [2020-11-29 18:52:46,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 18:52:46,617 INFO L93 Difference]: Finished difference Result 59 states and 64 transitions. [2020-11-29 18:52:46,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-29 18:52:46,617 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 15 [2020-11-29 18:52:46,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 18:52:46,618 INFO L225 Difference]: With dead ends: 59 [2020-11-29 18:52:46,618 INFO L226 Difference]: Without dead ends: 59 [2020-11-29 18:52:46,619 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-11-29 18:52:46,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-11-29 18:52:46,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 51. [2020-11-29 18:52:46,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-11-29 18:52:46,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2020-11-29 18:52:46,624 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 15 [2020-11-29 18:52:46,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 18:52:46,624 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2020-11-29 18:52:46,624 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-29 18:52:46,624 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2020-11-29 18:52:46,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-11-29 18:52:46,625 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 18:52:46,625 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 18:52:46,826 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-11-29 18:52:46,826 INFO L429 AbstractCegarLoop]: === Iteration 7 === [build_nondet_StringErr3REQUIRES_VIOLATION, build_nondet_StringErr2REQUIRES_VIOLATION, build_nondet_StringErr1REQUIRES_VIOLATION, build_nondet_StringErr0REQUIRES_VIOLATION, cstrchrErr0REQUIRES_VIOLATION, cstrchrErr5REQUIRES_VIOLATION, cstrchrErr1REQUIRES_VIOLATION, cstrchrErr3REQUIRES_VIOLATION, cstrchrErr2REQUIRES_VIOLATION, cstrchrErr4REQUIRES_VIOLATION, mainErr3ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr5ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION]=== [2020-11-29 18:52:46,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:52:46,827 INFO L82 PathProgramCache]: Analyzing trace with hash -269979680, now seen corresponding path program 1 times [2020-11-29 18:52:46,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:52:46,827 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214707272] [2020-11-29 18:52:46,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:52:46,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:52:46,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 18:52:46,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:52:46,932 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-11-29 18:52:46,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:52:46,997 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 18:52:46,997 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214707272] [2020-11-29 18:52:46,998 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 18:52:46,998 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-11-29 18:52:46,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081533240] [2020-11-29 18:52:46,998 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-29 18:52:46,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 18:52:46,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-29 18:52:46,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-11-29 18:52:46,999 INFO L87 Difference]: Start difference. First operand 51 states and 55 transitions. Second operand 10 states. [2020-11-29 18:52:47,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 18:52:47,309 INFO L93 Difference]: Finished difference Result 47 states and 51 transitions. [2020-11-29 18:52:47,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-29 18:52:47,310 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2020-11-29 18:52:47,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 18:52:47,310 INFO L225 Difference]: With dead ends: 47 [2020-11-29 18:52:47,310 INFO L226 Difference]: Without dead ends: 47 [2020-11-29 18:52:47,311 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2020-11-29 18:52:47,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-11-29 18:52:47,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2020-11-29 18:52:47,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-11-29 18:52:47,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2020-11-29 18:52:47,315 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 18 [2020-11-29 18:52:47,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 18:52:47,315 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2020-11-29 18:52:47,315 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-29 18:52:47,315 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2020-11-29 18:52:47,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-11-29 18:52:47,316 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 18:52:47,316 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 18:52:47,316 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-11-29 18:52:47,317 INFO L429 AbstractCegarLoop]: === Iteration 8 === [build_nondet_StringErr3REQUIRES_VIOLATION, build_nondet_StringErr2REQUIRES_VIOLATION, build_nondet_StringErr1REQUIRES_VIOLATION, build_nondet_StringErr0REQUIRES_VIOLATION, cstrchrErr0REQUIRES_VIOLATION, cstrchrErr5REQUIRES_VIOLATION, cstrchrErr1REQUIRES_VIOLATION, cstrchrErr3REQUIRES_VIOLATION, cstrchrErr2REQUIRES_VIOLATION, cstrchrErr4REQUIRES_VIOLATION, mainErr3ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr5ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION]=== [2020-11-29 18:52:47,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:52:47,317 INFO L82 PathProgramCache]: Analyzing trace with hash -269979679, now seen corresponding path program 1 times [2020-11-29 18:52:47,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:52:47,318 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823960774] [2020-11-29 18:52:47,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:52:47,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:52:47,449 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 18:52:47,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:52:47,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-11-29 18:52:47,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:52:47,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 18:52:47,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823960774] [2020-11-29 18:52:47,588 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 18:52:47,588 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-11-29 18:52:47,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77896211] [2020-11-29 18:52:47,588 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-29 18:52:47,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 18:52:47,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-29 18:52:47,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2020-11-29 18:52:47,590 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand 12 states. [2020-11-29 18:52:48,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 18:52:48,047 INFO L93 Difference]: Finished difference Result 57 states and 64 transitions. [2020-11-29 18:52:48,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-29 18:52:48,048 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 18 [2020-11-29 18:52:48,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 18:52:48,049 INFO L225 Difference]: With dead ends: 57 [2020-11-29 18:52:48,049 INFO L226 Difference]: Without dead ends: 57 [2020-11-29 18:52:48,049 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2020-11-29 18:52:48,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-11-29 18:52:48,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 53. [2020-11-29 18:52:48,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-11-29 18:52:48,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 59 transitions. [2020-11-29 18:52:48,054 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 59 transitions. Word has length 18 [2020-11-29 18:52:48,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 18:52:48,054 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 59 transitions. [2020-11-29 18:52:48,054 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-29 18:52:48,054 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 59 transitions. [2020-11-29 18:52:48,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-11-29 18:52:48,055 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 18:52:48,055 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] [2020-11-29 18:52:48,055 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-11-29 18:52:48,056 INFO L429 AbstractCegarLoop]: === Iteration 9 === [build_nondet_StringErr3REQUIRES_VIOLATION, build_nondet_StringErr2REQUIRES_VIOLATION, build_nondet_StringErr1REQUIRES_VIOLATION, build_nondet_StringErr0REQUIRES_VIOLATION, cstrchrErr0REQUIRES_VIOLATION, cstrchrErr5REQUIRES_VIOLATION, cstrchrErr1REQUIRES_VIOLATION, cstrchrErr3REQUIRES_VIOLATION, cstrchrErr2REQUIRES_VIOLATION, cstrchrErr4REQUIRES_VIOLATION, mainErr3ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr5ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION]=== [2020-11-29 18:52:48,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:52:48,056 INFO L82 PathProgramCache]: Analyzing trace with hash -463192456, now seen corresponding path program 1 times [2020-11-29 18:52:48,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:52:48,057 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384474902] [2020-11-29 18:52:48,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:52:48,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:52:48,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 18:52:48,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:52:48,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-11-29 18:52:48,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:52:48,145 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 18:52:48,146 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384474902] [2020-11-29 18:52:48,146 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 18:52:48,147 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-29 18:52:48,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307007859] [2020-11-29 18:52:48,147 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-29 18:52:48,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 18:52:48,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-29 18:52:48,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-29 18:52:48,149 INFO L87 Difference]: Start difference. First operand 53 states and 59 transitions. Second operand 5 states. [2020-11-29 18:52:48,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 18:52:48,275 INFO L93 Difference]: Finished difference Result 55 states and 61 transitions. [2020-11-29 18:52:48,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-29 18:52:48,276 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2020-11-29 18:52:48,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 18:52:48,276 INFO L225 Difference]: With dead ends: 55 [2020-11-29 18:52:48,276 INFO L226 Difference]: Without dead ends: 55 [2020-11-29 18:52:48,277 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-11-29 18:52:48,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-11-29 18:52:48,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2020-11-29 18:52:48,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-11-29 18:52:48,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 61 transitions. [2020-11-29 18:52:48,280 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 61 transitions. Word has length 22 [2020-11-29 18:52:48,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 18:52:48,280 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 61 transitions. [2020-11-29 18:52:48,280 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-29 18:52:48,280 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 61 transitions. [2020-11-29 18:52:48,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-11-29 18:52:48,281 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 18:52:48,281 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] [2020-11-29 18:52:48,281 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-11-29 18:52:48,281 INFO L429 AbstractCegarLoop]: === Iteration 10 === [build_nondet_StringErr3REQUIRES_VIOLATION, build_nondet_StringErr2REQUIRES_VIOLATION, build_nondet_StringErr1REQUIRES_VIOLATION, build_nondet_StringErr0REQUIRES_VIOLATION, cstrchrErr0REQUIRES_VIOLATION, cstrchrErr5REQUIRES_VIOLATION, cstrchrErr1REQUIRES_VIOLATION, cstrchrErr3REQUIRES_VIOLATION, cstrchrErr2REQUIRES_VIOLATION, cstrchrErr4REQUIRES_VIOLATION, mainErr3ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr5ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION]=== [2020-11-29 18:52:48,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:52:48,282 INFO L82 PathProgramCache]: Analyzing trace with hash 1542788213, now seen corresponding path program 1 times [2020-11-29 18:52:48,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:52:48,282 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56391982] [2020-11-29 18:52:48,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:52:48,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:52:48,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 18:52:48,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:52:48,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-11-29 18:52:48,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:52:48,568 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 18:52:48,568 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56391982] [2020-11-29 18:52:48,568 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 18:52:48,568 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-11-29 18:52:48,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642980088] [2020-11-29 18:52:48,569 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-29 18:52:48,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 18:52:48,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-29 18:52:48,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2020-11-29 18:52:48,570 INFO L87 Difference]: Start difference. First operand 55 states and 61 transitions. Second operand 14 states. [2020-11-29 18:52:49,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 18:52:49,154 INFO L93 Difference]: Finished difference Result 81 states and 87 transitions. [2020-11-29 18:52:49,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-11-29 18:52:49,154 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 24 [2020-11-29 18:52:49,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 18:52:49,158 INFO L225 Difference]: With dead ends: 81 [2020-11-29 18:52:49,158 INFO L226 Difference]: Without dead ends: 81 [2020-11-29 18:52:49,158 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2020-11-29 18:52:49,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-11-29 18:52:49,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 71. [2020-11-29 18:52:49,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-11-29 18:52:49,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 78 transitions. [2020-11-29 18:52:49,164 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 78 transitions. Word has length 24 [2020-11-29 18:52:49,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 18:52:49,165 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 78 transitions. [2020-11-29 18:52:49,165 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-11-29 18:52:49,165 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 78 transitions. [2020-11-29 18:52:49,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-11-29 18:52:49,166 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 18:52:49,166 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] [2020-11-29 18:52:49,166 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-11-29 18:52:49,166 INFO L429 AbstractCegarLoop]: === Iteration 11 === [build_nondet_StringErr3REQUIRES_VIOLATION, build_nondet_StringErr2REQUIRES_VIOLATION, build_nondet_StringErr1REQUIRES_VIOLATION, build_nondet_StringErr0REQUIRES_VIOLATION, cstrchrErr0REQUIRES_VIOLATION, cstrchrErr5REQUIRES_VIOLATION, cstrchrErr1REQUIRES_VIOLATION, cstrchrErr3REQUIRES_VIOLATION, cstrchrErr2REQUIRES_VIOLATION, cstrchrErr4REQUIRES_VIOLATION, mainErr3ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr5ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION]=== [2020-11-29 18:52:49,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:52:49,167 INFO L82 PathProgramCache]: Analyzing trace with hash -45559689, now seen corresponding path program 1 times [2020-11-29 18:52:49,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:52:49,167 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783084075] [2020-11-29 18:52:49,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:52:49,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:52:49,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 18:52:49,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:52:49,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-11-29 18:52:49,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:52:49,575 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 18:52:49,578 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783084075] [2020-11-29 18:52:49,578 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 18:52:49,578 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2020-11-29 18:52:49,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066995306] [2020-11-29 18:52:49,579 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-29 18:52:49,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 18:52:49,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-29 18:52:49,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2020-11-29 18:52:49,580 INFO L87 Difference]: Start difference. First operand 71 states and 78 transitions. Second operand 15 states. [2020-11-29 18:52:50,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 18:52:50,241 INFO L93 Difference]: Finished difference Result 101 states and 109 transitions. [2020-11-29 18:52:50,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-11-29 18:52:50,242 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 24 [2020-11-29 18:52:50,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 18:52:50,245 INFO L225 Difference]: With dead ends: 101 [2020-11-29 18:52:50,245 INFO L226 Difference]: Without dead ends: 101 [2020-11-29 18:52:50,246 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2020-11-29 18:52:50,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-11-29 18:52:50,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 72. [2020-11-29 18:52:50,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-11-29 18:52:50,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 80 transitions. [2020-11-29 18:52:50,253 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 80 transitions. Word has length 24 [2020-11-29 18:52:50,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 18:52:50,253 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 80 transitions. [2020-11-29 18:52:50,254 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-11-29 18:52:50,254 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 80 transitions. [2020-11-29 18:52:50,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-11-29 18:52:50,255 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 18:52:50,255 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, 1, 1, 1] [2020-11-29 18:52:50,255 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-11-29 18:52:50,256 INFO L429 AbstractCegarLoop]: === Iteration 12 === [build_nondet_StringErr3REQUIRES_VIOLATION, build_nondet_StringErr2REQUIRES_VIOLATION, build_nondet_StringErr1REQUIRES_VIOLATION, build_nondet_StringErr0REQUIRES_VIOLATION, cstrchrErr0REQUIRES_VIOLATION, cstrchrErr5REQUIRES_VIOLATION, cstrchrErr1REQUIRES_VIOLATION, cstrchrErr3REQUIRES_VIOLATION, cstrchrErr2REQUIRES_VIOLATION, cstrchrErr4REQUIRES_VIOLATION, mainErr3ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr5ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION]=== [2020-11-29 18:52:50,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:52:50,256 INFO L82 PathProgramCache]: Analyzing trace with hash -1919056224, now seen corresponding path program 1 times [2020-11-29 18:52:50,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:52:50,257 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796730513] [2020-11-29 18:52:50,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:52:50,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:52:50,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 18:52:50,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:52:50,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-11-29 18:52:50,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:52:50,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-29 18:52:50,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:52:50,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 18:52:50,504 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796730513] [2020-11-29 18:52:50,504 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 18:52:50,504 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-11-29 18:52:50,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780153567] [2020-11-29 18:52:50,505 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-29 18:52:50,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 18:52:50,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-29 18:52:50,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-11-29 18:52:50,507 INFO L87 Difference]: Start difference. First operand 72 states and 80 transitions. Second operand 12 states. [2020-11-29 18:52:50,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 18:52:50,991 INFO L93 Difference]: Finished difference Result 80 states and 88 transitions. [2020-11-29 18:52:50,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-29 18:52:50,992 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 27 [2020-11-29 18:52:50,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 18:52:50,993 INFO L225 Difference]: With dead ends: 80 [2020-11-29 18:52:50,994 INFO L226 Difference]: Without dead ends: 80 [2020-11-29 18:52:50,994 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2020-11-29 18:52:50,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-11-29 18:52:51,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2020-11-29 18:52:51,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-11-29 18:52:51,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 88 transitions. [2020-11-29 18:52:51,008 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 88 transitions. Word has length 27 [2020-11-29 18:52:51,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 18:52:51,008 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 88 transitions. [2020-11-29 18:52:51,008 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-29 18:52:51,009 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 88 transitions. [2020-11-29 18:52:51,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-11-29 18:52:51,010 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 18:52:51,010 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, 1, 1, 1] [2020-11-29 18:52:51,010 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-11-29 18:52:51,010 INFO L429 AbstractCegarLoop]: === Iteration 13 === [build_nondet_StringErr3REQUIRES_VIOLATION, build_nondet_StringErr2REQUIRES_VIOLATION, build_nondet_StringErr1REQUIRES_VIOLATION, build_nondet_StringErr0REQUIRES_VIOLATION, cstrchrErr0REQUIRES_VIOLATION, cstrchrErr5REQUIRES_VIOLATION, cstrchrErr1REQUIRES_VIOLATION, cstrchrErr3REQUIRES_VIOLATION, cstrchrErr2REQUIRES_VIOLATION, cstrchrErr4REQUIRES_VIOLATION, mainErr3ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr5ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION]=== [2020-11-29 18:52:51,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:52:51,011 INFO L82 PathProgramCache]: Analyzing trace with hash -1919056223, now seen corresponding path program 1 times [2020-11-29 18:52:51,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:52:51,012 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993643041] [2020-11-29 18:52:51,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:52:51,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:52:51,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 18:52:51,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:52:51,191 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-11-29 18:52:51,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:52:51,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-29 18:52:51,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:52:51,555 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 18:52:51,556 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993643041] [2020-11-29 18:52:51,556 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 18:52:51,556 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-11-29 18:52:51,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022635960] [2020-11-29 18:52:51,557 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-29 18:52:51,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 18:52:51,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-29 18:52:51,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2020-11-29 18:52:51,557 INFO L87 Difference]: Start difference. First operand 79 states and 88 transitions. Second operand 15 states. [2020-11-29 18:52:52,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 18:52:52,266 INFO L93 Difference]: Finished difference Result 88 states and 98 transitions. [2020-11-29 18:52:52,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-29 18:52:52,267 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 27 [2020-11-29 18:52:52,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 18:52:52,269 INFO L225 Difference]: With dead ends: 88 [2020-11-29 18:52:52,269 INFO L226 Difference]: Without dead ends: 88 [2020-11-29 18:52:52,269 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2020-11-29 18:52:52,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-11-29 18:52:52,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 84. [2020-11-29 18:52:52,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-11-29 18:52:52,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 94 transitions. [2020-11-29 18:52:52,278 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 94 transitions. Word has length 27 [2020-11-29 18:52:52,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 18:52:52,278 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 94 transitions. [2020-11-29 18:52:52,278 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-11-29 18:52:52,278 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 94 transitions. [2020-11-29 18:52:52,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-11-29 18:52:52,280 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 18:52:52,280 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, 1, 1, 1] [2020-11-29 18:52:52,281 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-11-29 18:52:52,281 INFO L429 AbstractCegarLoop]: === Iteration 14 === [build_nondet_StringErr3REQUIRES_VIOLATION, build_nondet_StringErr2REQUIRES_VIOLATION, build_nondet_StringErr1REQUIRES_VIOLATION, build_nondet_StringErr0REQUIRES_VIOLATION, cstrchrErr0REQUIRES_VIOLATION, cstrchrErr5REQUIRES_VIOLATION, cstrchrErr1REQUIRES_VIOLATION, cstrchrErr3REQUIRES_VIOLATION, cstrchrErr2REQUIRES_VIOLATION, cstrchrErr4REQUIRES_VIOLATION, mainErr3ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr5ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION]=== [2020-11-29 18:52:52,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:52:52,282 INFO L82 PathProgramCache]: Analyzing trace with hash -1917209182, now seen corresponding path program 1 times [2020-11-29 18:52:52,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:52:52,282 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060881743] [2020-11-29 18:52:52,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:52:52,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 18:52:52,309 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 18:52:52,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 18:52:52,334 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 18:52:52,363 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 18:52:52,367 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-29 18:52:52,368 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-11-29 18:52:52,415 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.11 06:52:52 BoogieIcfgContainer [2020-11-29 18:52:52,415 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-29 18:52:52,416 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-29 18:52:52,416 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-29 18:52:52,416 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-29 18:52:52,417 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 06:52:43" (3/4) ... [2020-11-29 18:52:52,419 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-29 18:52:52,506 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_62dccf98-19de-490c-bcb2-cd92ff8c79d4/bin/uautomizer/witness.graphml [2020-11-29 18:52:52,507 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-29 18:52:52,511 INFO L168 Benchmark]: Toolchain (without parser) took 10267.75 ms. Allocated memory was 100.7 MB in the beginning and 182.5 MB in the end (delta: 81.8 MB). Free memory was 67.0 MB in the beginning and 128.9 MB in the end (delta: -61.9 MB). Peak memory consumption was 19.0 MB. Max. memory is 16.1 GB. [2020-11-29 18:52:52,513 INFO L168 Benchmark]: CDTParser took 0.36 ms. Allocated memory is still 71.3 MB. Free memory was 34.1 MB in the beginning and 34.1 MB in the end (delta: 32.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 18:52:52,514 INFO L168 Benchmark]: CACSL2BoogieTranslator took 605.52 ms. Allocated memory is still 100.7 MB. Free memory was 66.8 MB in the beginning and 66.5 MB in the end (delta: 346.5 kB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-29 18:52:52,514 INFO L168 Benchmark]: Boogie Preprocessor took 120.61 ms. Allocated memory is still 100.7 MB. Free memory was 66.5 MB in the beginning and 63.8 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 18:52:52,515 INFO L168 Benchmark]: RCFGBuilder took 877.16 ms. Allocated memory is still 100.7 MB. Free memory was 63.8 MB in the beginning and 67.6 MB in the end (delta: -3.9 MB). Peak memory consumption was 38.5 MB. Max. memory is 16.1 GB. [2020-11-29 18:52:52,515 INFO L168 Benchmark]: TraceAbstraction took 8550.94 ms. Allocated memory was 100.7 MB in the beginning and 182.5 MB in the end (delta: 81.8 MB). Free memory was 67.1 MB in the beginning and 131.0 MB in the end (delta: -64.0 MB). Peak memory consumption was 18.5 MB. Max. memory is 16.1 GB. [2020-11-29 18:52:52,516 INFO L168 Benchmark]: Witness Printer took 91.01 ms. Allocated memory is still 182.5 MB. Free memory was 131.0 MB in the beginning and 128.9 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 18:52:52,520 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.36 ms. Allocated memory is still 71.3 MB. Free memory was 34.1 MB in the beginning and 34.1 MB in the end (delta: 32.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 605.52 ms. Allocated memory is still 100.7 MB. Free memory was 66.8 MB in the beginning and 66.5 MB in the end (delta: 346.5 kB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 120.61 ms. Allocated memory is still 100.7 MB. Free memory was 66.5 MB in the beginning and 63.8 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 877.16 ms. Allocated memory is still 100.7 MB. Free memory was 63.8 MB in the beginning and 67.6 MB in the end (delta: -3.9 MB). Peak memory consumption was 38.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 8550.94 ms. Allocated memory was 100.7 MB in the beginning and 182.5 MB in the end (delta: 81.8 MB). Free memory was 67.1 MB in the beginning and 131.0 MB in the end (delta: -64.0 MB). Peak memory consumption was 18.5 MB. Max. memory is 16.1 GB. * Witness Printer took 91.01 ms. Allocated memory is still 182.5 MB. Free memory was 131.0 MB in the beginning and 128.9 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 537]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L536] CALL, EXPR build_nondet_String() [L515] int length = __VERIFIER_nondet_int(); [L516] COND TRUE length < 1 [L517] length = 1 VAL [length=1] [L519] char* nondetString = (char*) malloc(length * sizeof(char)); [L521] int i = 0; VAL [i=0, length=1, malloc(length * sizeof(char))={-1:0}, nondetString={-1:0}] [L521] COND FALSE !(i < length - 1) VAL [i=0, length=1, malloc(length * sizeof(char))={-1:0}, nondetString={-1:0}] [L526] nondetString[length-1] = '\0' VAL [i=0, length=1, malloc(length * sizeof(char))={-1:0}, nondetString={-1:0}] [L527] return nondetString; VAL [\result={-1:0}, i=0, length=1, malloc(length * sizeof(char))={-1:0}, nondetString={-1:0}] [L536] RET, EXPR build_nondet_String() VAL [build_nondet_String()={-1:0}] [L536] char* s = build_nondet_String(); [L537] CALL cstrchr(s,__VERIFIER_nondet_int()) VAL [\old(c)=2, s={-1:0}] [L531] EXPR \read(*s) VAL [\old(c)=2, \read(*s)=0, c=2, s={-1:0}, s={-1:0}] [L531] *s != '\0' && *s != (char)c VAL [*s != '\0' && *s != (char)c=0, \old(c)=2, \read(*s)=0, c=2, s={-1:0}, s={-1:0}] [L531] COND FALSE !(*s != '\0' && *s != (char)c) [L533] EXPR \read(*s) VAL [\old(c)=2, \read(*s)=0, c=2, s={-1:0}, s={-1:0}] [L533] EXPR (*s == c) ? (char *) s : 0 VAL [(*s == c) ? (char *) s : 0={0:0}, \old(c)=2, \read(*s)=0, c=2, s={-1:0}, s={-1:0}] [L533] return ( (*s == c) ? (char *) s : 0 ); [L537] RET cstrchr(s,__VERIFIER_nondet_int()) VAL [__VERIFIER_nondet_int()=2, cstrchr(s,__VERIFIER_nondet_int())={0:0}, s={-1:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 10 procedures, 71 locations, 16 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 8.4s, OverallIterations: 14, TraceHistogramMax: 2, AutomataDifference: 4.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 450 SDtfs, 854 SDslu, 794 SDs, 0 SdLazy, 2615 SolverSat, 125 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 196 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 2.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=84occurred in iteration=13, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 13 MinimizatonAttempts, 66 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 2.5s InterpolantComputationTime, 272 NumberOfCodeBlocks, 272 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 231 ConstructedInterpolants, 0 QuantifiedInterpolants, 22663 SizeOfPredicates, 3 NumberOfNonLiveVariables, 69 ConjunctsInSsa, 11 ConjunctsInUnsatCore, 14 InterpolantComputations, 12 PerfectInterpolantSequences, 4/7 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...