./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/openbsd_cstrnlen-alloca-1.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_08ed49bb-2dda-4220-b191-3ae1359e6f78/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_08ed49bb-2dda-4220-b191-3ae1359e6f78/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_08ed49bb-2dda-4220-b191-3ae1359e6f78/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_08ed49bb-2dda-4220-b191-3ae1359e6f78/bin/uautomizer/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/openbsd_cstrnlen-alloca-1.i -s /tmp/vcloud-vcloud-master/worker/run_dir_08ed49bb-2dda-4220-b191-3ae1359e6f78/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_08ed49bb-2dda-4220-b191-3ae1359e6f78/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 7ac509d7b3f1ef173e01ced3ce9249a58ee1c04d .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-30 01:31:40,804 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-30 01:31:40,807 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-30 01:31:40,882 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-30 01:31:40,883 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-30 01:31:40,884 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-30 01:31:40,886 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-30 01:31:40,888 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-30 01:31:40,896 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-30 01:31:40,898 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-30 01:31:40,900 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-30 01:31:40,903 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-30 01:31:40,904 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-30 01:31:40,910 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-30 01:31:40,912 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-30 01:31:40,913 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-30 01:31:40,914 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-30 01:31:40,915 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-30 01:31:40,917 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-30 01:31:40,920 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-30 01:31:40,922 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-30 01:31:40,925 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-30 01:31:40,929 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-30 01:31:40,930 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-30 01:31:40,944 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-30 01:31:40,945 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-30 01:31:40,945 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-30 01:31:40,951 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-30 01:31:40,952 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-30 01:31:40,953 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-30 01:31:40,953 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-30 01:31:40,955 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-30 01:31:40,956 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-30 01:31:40,957 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-30 01:31:40,959 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-30 01:31:40,959 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-30 01:31:40,960 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-30 01:31:40,960 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-30 01:31:40,960 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-30 01:31:40,961 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-30 01:31:40,962 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-30 01:31:40,964 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_08ed49bb-2dda-4220-b191-3ae1359e6f78/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2020-11-30 01:31:41,004 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-30 01:31:41,004 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-30 01:31:41,005 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-30 01:31:41,006 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-30 01:31:41,006 INFO L138 SettingsManager]: * Use SBE=true [2020-11-30 01:31:41,006 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-30 01:31:41,006 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-30 01:31:41,007 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-11-30 01:31:41,007 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-30 01:31:41,007 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-30 01:31:41,007 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-30 01:31:41,007 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-11-30 01:31:41,007 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-11-30 01:31:41,008 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-11-30 01:31:41,008 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-30 01:31:41,008 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-30 01:31:41,008 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-30 01:31:41,008 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-30 01:31:41,009 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-30 01:31:41,009 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-30 01:31:41,009 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-30 01:31:41,009 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-30 01:31:41,009 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-30 01:31:41,010 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-30 01:31:41,010 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-30 01:31:41,010 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-30 01:31:41,010 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-30 01:31:41,010 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-30 01:31:41,010 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_08ed49bb-2dda-4220-b191-3ae1359e6f78/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_08ed49bb-2dda-4220-b191-3ae1359e6f78/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7ac509d7b3f1ef173e01ced3ce9249a58ee1c04d [2020-11-30 01:31:41,306 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-30 01:31:41,350 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-30 01:31:41,353 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-30 01:31:41,356 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-30 01:31:41,357 INFO L275 PluginConnector]: CDTParser initialized [2020-11-30 01:31:41,359 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_08ed49bb-2dda-4220-b191-3ae1359e6f78/bin/uautomizer/../../sv-benchmarks/c/array-memsafety/openbsd_cstrnlen-alloca-1.i [2020-11-30 01:31:41,456 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_08ed49bb-2dda-4220-b191-3ae1359e6f78/bin/uautomizer/data/b11bc3767/ebc80ec0fc5d4f88963b0a56ade0b4f5/FLAGec0817c6f [2020-11-30 01:31:42,190 INFO L306 CDTParser]: Found 1 translation units. [2020-11-30 01:31:42,195 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_08ed49bb-2dda-4220-b191-3ae1359e6f78/sv-benchmarks/c/array-memsafety/openbsd_cstrnlen-alloca-1.i [2020-11-30 01:31:42,223 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_08ed49bb-2dda-4220-b191-3ae1359e6f78/bin/uautomizer/data/b11bc3767/ebc80ec0fc5d4f88963b0a56ade0b4f5/FLAGec0817c6f [2020-11-30 01:31:42,435 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_08ed49bb-2dda-4220-b191-3ae1359e6f78/bin/uautomizer/data/b11bc3767/ebc80ec0fc5d4f88963b0a56ade0b4f5 [2020-11-30 01:31:42,439 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-30 01:31:42,441 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-11-30 01:31:42,443 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-30 01:31:42,443 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-30 01:31:42,448 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-30 01:31:42,449 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 01:31:42" (1/1) ... [2020-11-30 01:31:42,451 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@26bc3490 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:31:42, skipping insertion in model container [2020-11-30 01:31:42,452 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 01:31:42" (1/1) ... [2020-11-30 01:31:42,461 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-30 01:31:42,502 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-30 01:31:42,910 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 01:31:42,923 INFO L203 MainTranslator]: Completed pre-run [2020-11-30 01:31:42,990 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 01:31:43,053 INFO L208 MainTranslator]: Completed translation [2020-11-30 01:31:43,056 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:31:43 WrapperNode [2020-11-30 01:31:43,056 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-30 01:31:43,058 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-30 01:31:43,058 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-30 01:31:43,058 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-30 01:31:43,073 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:31:43" (1/1) ... [2020-11-30 01:31:43,073 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:31:43" (1/1) ... [2020-11-30 01:31:43,107 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:31:43" (1/1) ... [2020-11-30 01:31:43,108 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:31:43" (1/1) ... [2020-11-30 01:31:43,141 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:31:43" (1/1) ... [2020-11-30 01:31:43,147 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:31:43" (1/1) ... [2020-11-30 01:31:43,153 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:31:43" (1/1) ... [2020-11-30 01:31:43,160 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-30 01:31:43,161 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-30 01:31:43,161 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-30 01:31:43,161 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-30 01:31:43,163 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:31:43" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_08ed49bb-2dda-4220-b191-3ae1359e6f78/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 [2020-11-30 01:31:43,242 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-30 01:31:43,242 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-30 01:31:43,242 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-11-30 01:31:43,243 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-11-30 01:31:43,243 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2020-11-30 01:31:43,243 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2020-11-30 01:31:43,243 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2020-11-30 01:31:43,243 INFO L138 BoogieDeclarations]: Found implementation of procedure cstrnlen [2020-11-30 01:31:43,243 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-30 01:31:43,243 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-11-30 01:31:43,244 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-11-30 01:31:43,244 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-11-30 01:31:43,244 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-11-30 01:31:43,244 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-11-30 01:31:43,244 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-11-30 01:31:43,244 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-11-30 01:31:43,244 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-11-30 01:31:43,245 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-11-30 01:31:43,245 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-11-30 01:31:43,245 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-11-30 01:31:43,245 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-11-30 01:31:43,245 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-11-30 01:31:43,245 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-11-30 01:31:43,245 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-11-30 01:31:43,246 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-11-30 01:31:43,246 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-11-30 01:31:43,246 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-11-30 01:31:43,246 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2020-11-30 01:31:43,246 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2020-11-30 01:31:43,246 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2020-11-30 01:31:43,247 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-11-30 01:31:43,247 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-11-30 01:31:43,247 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-11-30 01:31:43,247 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-11-30 01:31:43,247 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-11-30 01:31:43,247 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-11-30 01:31:43,247 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-11-30 01:31:43,248 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-11-30 01:31:43,248 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-11-30 01:31:43,248 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-11-30 01:31:43,248 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-11-30 01:31:43,248 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-11-30 01:31:43,248 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-11-30 01:31:43,248 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-11-30 01:31:43,248 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-11-30 01:31:43,249 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-11-30 01:31:43,249 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-11-30 01:31:43,249 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-11-30 01:31:43,249 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-11-30 01:31:43,249 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-11-30 01:31:43,249 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-11-30 01:31:43,249 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-11-30 01:31:43,250 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-11-30 01:31:43,250 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-11-30 01:31:43,250 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-11-30 01:31:43,250 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-11-30 01:31:43,250 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-11-30 01:31:43,250 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-11-30 01:31:43,250 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-11-30 01:31:43,250 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-11-30 01:31:43,251 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-11-30 01:31:43,251 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-11-30 01:31:43,251 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-11-30 01:31:43,251 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-11-30 01:31:43,251 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-11-30 01:31:43,251 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-11-30 01:31:43,251 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-11-30 01:31:43,251 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-11-30 01:31:43,252 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-11-30 01:31:43,252 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-11-30 01:31:43,252 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-11-30 01:31:43,252 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-11-30 01:31:43,252 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-30 01:31:43,252 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-11-30 01:31:43,252 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-11-30 01:31:43,252 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-11-30 01:31:43,253 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-11-30 01:31:43,253 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-11-30 01:31:43,253 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-11-30 01:31:43,253 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-11-30 01:31:43,253 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-11-30 01:31:43,253 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-11-30 01:31:43,253 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-11-30 01:31:43,254 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-11-30 01:31:43,254 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-11-30 01:31:43,254 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-11-30 01:31:43,254 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-11-30 01:31:43,254 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-11-30 01:31:43,254 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-11-30 01:31:43,254 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-11-30 01:31:43,255 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-11-30 01:31:43,255 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-11-30 01:31:43,255 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-11-30 01:31:43,255 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-11-30 01:31:43,255 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-11-30 01:31:43,255 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-11-30 01:31:43,255 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-11-30 01:31:43,256 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-11-30 01:31:43,256 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-11-30 01:31:43,256 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-11-30 01:31:43,256 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-11-30 01:31:43,256 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-11-30 01:31:43,256 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-11-30 01:31:43,257 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-11-30 01:31:43,257 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-11-30 01:31:43,257 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-11-30 01:31:43,257 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-11-30 01:31:43,257 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-11-30 01:31:43,257 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-11-30 01:31:43,257 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-11-30 01:31:43,258 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-11-30 01:31:43,258 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-11-30 01:31:43,258 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-11-30 01:31:43,258 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-11-30 01:31:43,258 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-11-30 01:31:43,258 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-11-30 01:31:43,259 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-11-30 01:31:43,259 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-11-30 01:31:43,259 INFO L130 BoogieDeclarations]: Found specification of procedure cstrnlen [2020-11-30 01:31:43,259 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-30 01:31:43,259 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-30 01:31:43,259 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-30 01:31:43,260 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-30 01:31:43,260 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-30 01:31:43,260 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-30 01:31:43,260 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-30 01:31:43,938 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-30 01:31:43,940 INFO L298 CfgBuilder]: Removed 2 assume(true) statements. [2020-11-30 01:31:43,943 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 01:31:43 BoogieIcfgContainer [2020-11-30 01:31:43,943 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-30 01:31:43,947 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-30 01:31:43,948 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-30 01:31:43,956 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-30 01:31:43,957 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.11 01:31:42" (1/3) ... [2020-11-30 01:31:43,958 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d7f5243 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 01:31:43, skipping insertion in model container [2020-11-30 01:31:43,959 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:31:43" (2/3) ... [2020-11-30 01:31:43,959 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d7f5243 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 01:31:43, skipping insertion in model container [2020-11-30 01:31:43,959 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 01:31:43" (3/3) ... [2020-11-30 01:31:43,963 INFO L111 eAbstractionObserver]: Analyzing ICFG openbsd_cstrnlen-alloca-1.i [2020-11-30 01:31:43,977 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-30 01:31:43,986 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 7 error locations. [2020-11-30 01:31:44,003 INFO L253 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2020-11-30 01:31:44,041 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-30 01:31:44,042 INFO L378 AbstractCegarLoop]: Hoare is false [2020-11-30 01:31:44,049 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-30 01:31:44,049 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-30 01:31:44,049 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-30 01:31:44,049 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-30 01:31:44,049 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-30 01:31:44,050 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-30 01:31:44,071 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states. [2020-11-30 01:31:44,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-30 01:31:44,086 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:31:44,087 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:31:44,087 INFO L429 AbstractCegarLoop]: === Iteration 1 === [cstrnlenErr0REQUIRES_VIOLATION, cstrnlenErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-30 01:31:44,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:31:44,097 INFO L82 PathProgramCache]: Analyzing trace with hash 787746653, now seen corresponding path program 1 times [2020-11-30 01:31:44,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:31:44,111 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516275281] [2020-11-30 01:31:44,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:31:44,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:31:44,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-30 01:31:44,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:31:44,375 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:31:44,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516275281] [2020-11-30 01:31:44,377 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 01:31:44,377 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-30 01:31:44,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696679666] [2020-11-30 01:31:44,385 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-30 01:31:44,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:31:44,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-30 01:31:44,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 01:31:44,407 INFO L87 Difference]: Start difference. First operand 37 states. Second operand 3 states. [2020-11-30 01:31:44,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:31:44,540 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2020-11-30 01:31:44,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-30 01:31:44,543 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2020-11-30 01:31:44,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:31:44,554 INFO L225 Difference]: With dead ends: 37 [2020-11-30 01:31:44,554 INFO L226 Difference]: Without dead ends: 34 [2020-11-30 01:31:44,556 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 [2020-11-30 01:31:44,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-11-30 01:31:44,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2020-11-30 01:31:44,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-11-30 01:31:44,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2020-11-30 01:31:44,610 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 11 [2020-11-30 01:31:44,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:31:44,612 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2020-11-30 01:31:44,612 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-30 01:31:44,613 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2020-11-30 01:31:44,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-30 01:31:44,614 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:31:44,614 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:31:44,614 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-30 01:31:44,614 INFO L429 AbstractCegarLoop]: === Iteration 2 === [cstrnlenErr0REQUIRES_VIOLATION, cstrnlenErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-30 01:31:44,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:31:44,615 INFO L82 PathProgramCache]: Analyzing trace with hash 787746343, now seen corresponding path program 1 times [2020-11-30 01:31:44,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:31:44,617 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729888699] [2020-11-30 01:31:44,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:31:44,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:31:44,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-30 01:31:44,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:31:44,740 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:31:44,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729888699] [2020-11-30 01:31:44,741 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 01:31:44,741 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-30 01:31:44,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375944145] [2020-11-30 01:31:44,743 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-30 01:31:44,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:31:44,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-30 01:31:44,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-30 01:31:44,745 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand 4 states. [2020-11-30 01:31:44,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:31:44,891 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2020-11-30 01:31:44,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-30 01:31:44,892 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2020-11-30 01:31:44,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:31:44,893 INFO L225 Difference]: With dead ends: 32 [2020-11-30 01:31:44,894 INFO L226 Difference]: Without dead ends: 32 [2020-11-30 01:31:44,894 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 [2020-11-30 01:31:44,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-11-30 01:31:44,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-11-30 01:31:44,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-11-30 01:31:44,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2020-11-30 01:31:44,901 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 11 [2020-11-30 01:31:44,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:31:44,901 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2020-11-30 01:31:44,902 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-30 01:31:44,902 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2020-11-30 01:31:44,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-30 01:31:44,903 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:31:44,903 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:31:44,903 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-30 01:31:44,904 INFO L429 AbstractCegarLoop]: === Iteration 3 === [cstrnlenErr0REQUIRES_VIOLATION, cstrnlenErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-30 01:31:44,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:31:44,904 INFO L82 PathProgramCache]: Analyzing trace with hash 787746344, now seen corresponding path program 1 times [2020-11-30 01:31:44,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:31:44,905 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189282256] [2020-11-30 01:31:44,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:31:44,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:31:45,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-30 01:31:45,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:31:45,035 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:31:45,035 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189282256] [2020-11-30 01:31:45,035 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 01:31:45,035 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-30 01:31:45,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186807577] [2020-11-30 01:31:45,037 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-30 01:31:45,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:31:45,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-30 01:31:45,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-11-30 01:31:45,039 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand 5 states. [2020-11-30 01:31:45,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:31:45,204 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2020-11-30 01:31:45,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-30 01:31:45,205 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2020-11-30 01:31:45,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:31:45,207 INFO L225 Difference]: With dead ends: 31 [2020-11-30 01:31:45,207 INFO L226 Difference]: Without dead ends: 31 [2020-11-30 01:31:45,207 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 [2020-11-30 01:31:45,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-11-30 01:31:45,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-11-30 01:31:45,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-11-30 01:31:45,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2020-11-30 01:31:45,216 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 11 [2020-11-30 01:31:45,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:31:45,217 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2020-11-30 01:31:45,217 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-30 01:31:45,217 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2020-11-30 01:31:45,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-30 01:31:45,218 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:31:45,218 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:31:45,218 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-30 01:31:45,219 INFO L429 AbstractCegarLoop]: === Iteration 4 === [cstrnlenErr0REQUIRES_VIOLATION, cstrnlenErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-30 01:31:45,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:31:45,219 INFO L82 PathProgramCache]: Analyzing trace with hash 787746397, now seen corresponding path program 1 times [2020-11-30 01:31:45,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:31:45,220 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706175012] [2020-11-30 01:31:45,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:31:45,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:31:45,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-30 01:31:45,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:31:45,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:31:45,309 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706175012] [2020-11-30 01:31:45,309 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 01:31:45,310 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-30 01:31:45,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341486833] [2020-11-30 01:31:45,310 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-30 01:31:45,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:31:45,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-30 01:31:45,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-11-30 01:31:45,319 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand 5 states. [2020-11-30 01:31:45,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:31:45,446 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2020-11-30 01:31:45,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-30 01:31:45,446 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2020-11-30 01:31:45,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:31:45,449 INFO L225 Difference]: With dead ends: 39 [2020-11-30 01:31:45,449 INFO L226 Difference]: Without dead ends: 39 [2020-11-30 01:31:45,450 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 [2020-11-30 01:31:45,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-11-30 01:31:45,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 34. [2020-11-30 01:31:45,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-11-30 01:31:45,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2020-11-30 01:31:45,471 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 11 [2020-11-30 01:31:45,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:31:45,471 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2020-11-30 01:31:45,471 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-30 01:31:45,472 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2020-11-30 01:31:45,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-30 01:31:45,472 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:31:45,472 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:31:45,473 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-30 01:31:45,473 INFO L429 AbstractCegarLoop]: === Iteration 5 === [cstrnlenErr0REQUIRES_VIOLATION, cstrnlenErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-30 01:31:45,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:31:45,473 INFO L82 PathProgramCache]: Analyzing trace with hash 789593439, now seen corresponding path program 1 times [2020-11-30 01:31:45,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:31:45,474 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998540701] [2020-11-30 01:31:45,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:31:45,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:31:45,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-30 01:31:45,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:31:45,583 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:31:45,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998540701] [2020-11-30 01:31:45,584 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 01:31:45,584 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-30 01:31:45,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341931703] [2020-11-30 01:31:45,585 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-30 01:31:45,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:31:45,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-30 01:31:45,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-30 01:31:45,586 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand 5 states. [2020-11-30 01:31:45,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:31:45,746 INFO L93 Difference]: Finished difference Result 43 states and 49 transitions. [2020-11-30 01:31:45,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-30 01:31:45,747 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2020-11-30 01:31:45,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:31:45,748 INFO L225 Difference]: With dead ends: 43 [2020-11-30 01:31:45,748 INFO L226 Difference]: Without dead ends: 43 [2020-11-30 01:31:45,748 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-11-30 01:31:45,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-11-30 01:31:45,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 36. [2020-11-30 01:31:45,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-11-30 01:31:45,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2020-11-30 01:31:45,754 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 11 [2020-11-30 01:31:45,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:31:45,757 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2020-11-30 01:31:45,757 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-30 01:31:45,757 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2020-11-30 01:31:45,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-11-30 01:31:45,759 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:31:45,760 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:31:45,760 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-30 01:31:45,761 INFO L429 AbstractCegarLoop]: === Iteration 6 === [cstrnlenErr0REQUIRES_VIOLATION, cstrnlenErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-30 01:31:45,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:31:45,761 INFO L82 PathProgramCache]: Analyzing trace with hash 849748688, now seen corresponding path program 1 times [2020-11-30 01:31:45,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:31:45,763 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30407218] [2020-11-30 01:31:45,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:31:45,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:31:45,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-30 01:31:45,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:31:45,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:31:45,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30407218] [2020-11-30 01:31:45,880 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 01:31:45,880 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-30 01:31:45,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322609330] [2020-11-30 01:31:45,881 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-30 01:31:45,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:31:45,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-30 01:31:45,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-11-30 01:31:45,882 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand 6 states. [2020-11-30 01:31:46,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:31:46,079 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2020-11-30 01:31:46,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-30 01:31:46,087 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-11-30 01:31:46,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:31:46,087 INFO L225 Difference]: With dead ends: 35 [2020-11-30 01:31:46,088 INFO L226 Difference]: Without dead ends: 35 [2020-11-30 01:31:46,088 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-11-30 01:31:46,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-11-30 01:31:46,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-11-30 01:31:46,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-11-30 01:31:46,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2020-11-30 01:31:46,093 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 16 [2020-11-30 01:31:46,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:31:46,094 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2020-11-30 01:31:46,094 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-30 01:31:46,094 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2020-11-30 01:31:46,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-11-30 01:31:46,095 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:31:46,095 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:31:46,095 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-30 01:31:46,095 INFO L429 AbstractCegarLoop]: === Iteration 7 === [cstrnlenErr0REQUIRES_VIOLATION, cstrnlenErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-30 01:31:46,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:31:46,096 INFO L82 PathProgramCache]: Analyzing trace with hash 849748689, now seen corresponding path program 1 times [2020-11-30 01:31:46,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:31:46,097 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825562812] [2020-11-30 01:31:46,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:31:46,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:31:46,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-30 01:31:46,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:31:46,264 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:31:46,264 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825562812] [2020-11-30 01:31:46,265 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 01:31:46,265 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-11-30 01:31:46,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041990656] [2020-11-30 01:31:46,265 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-30 01:31:46,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:31:46,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-30 01:31:46,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-11-30 01:31:46,266 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand 8 states. [2020-11-30 01:31:46,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:31:46,571 INFO L93 Difference]: Finished difference Result 44 states and 52 transitions. [2020-11-30 01:31:46,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-30 01:31:46,575 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 16 [2020-11-30 01:31:46,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:31:46,578 INFO L225 Difference]: With dead ends: 44 [2020-11-30 01:31:46,578 INFO L226 Difference]: Without dead ends: 44 [2020-11-30 01:31:46,579 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-11-30 01:31:46,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-11-30 01:31:46,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 38. [2020-11-30 01:31:46,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-11-30 01:31:46,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 45 transitions. [2020-11-30 01:31:46,593 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 45 transitions. Word has length 16 [2020-11-30 01:31:46,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:31:46,593 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 45 transitions. [2020-11-30 01:31:46,593 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-30 01:31:46,593 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 45 transitions. [2020-11-30 01:31:46,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-30 01:31:46,594 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:31:46,594 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:31:46,594 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-11-30 01:31:46,594 INFO L429 AbstractCegarLoop]: === Iteration 8 === [cstrnlenErr0REQUIRES_VIOLATION, cstrnlenErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-30 01:31:46,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:31:46,595 INFO L82 PathProgramCache]: Analyzing trace with hash -2015068958, now seen corresponding path program 1 times [2020-11-30 01:31:46,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:31:46,596 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944650983] [2020-11-30 01:31:46,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:31:46,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:31:46,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-30 01:31:46,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:31:46,702 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:31:46,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944650983] [2020-11-30 01:31:46,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241466186] [2020-11-30 01:31:46,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_08ed49bb-2dda-4220-b191-3ae1359e6f78/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 [2020-11-30 01:31:46,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:31:46,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-30 01:31:46,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:31:47,021 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 [2020-11-30 01:31:47,022 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-30 01:31:47,231 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-11-30 01:31:47,232 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 01:31:47,233 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-30 01:31:47,233 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2020-11-30 01:31:47,314 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:31:47,314 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 01:31:47,314 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2020-11-30 01:31:47,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058201930] [2020-11-30 01:31:47,315 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-30 01:31:47,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:31:47,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-30 01:31:47,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-11-30 01:31:47,316 INFO L87 Difference]: Start difference. First operand 38 states and 45 transitions. Second operand 7 states. [2020-11-30 01:31:47,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:31:47,515 INFO L93 Difference]: Finished difference Result 44 states and 51 transitions. [2020-11-30 01:31:47,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-30 01:31:47,516 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 15 [2020-11-30 01:31:47,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:31:47,516 INFO L225 Difference]: With dead ends: 44 [2020-11-30 01:31:47,517 INFO L226 Difference]: Without dead ends: 44 [2020-11-30 01:31:47,517 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-11-30 01:31:47,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-11-30 01:31:47,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 35. [2020-11-30 01:31:47,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-11-30 01:31:47,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2020-11-30 01:31:47,521 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 15 [2020-11-30 01:31:47,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:31:47,522 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2020-11-30 01:31:47,522 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-30 01:31:47,522 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2020-11-30 01:31:47,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-11-30 01:31:47,525 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:31:47,526 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:31:47,743 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2020-11-30 01:31:47,743 INFO L429 AbstractCegarLoop]: === Iteration 9 === [cstrnlenErr0REQUIRES_VIOLATION, cstrnlenErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-30 01:31:47,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:31:47,744 INFO L82 PathProgramCache]: Analyzing trace with hash 1695397446, now seen corresponding path program 1 times [2020-11-30 01:31:47,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:31:47,744 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614059463] [2020-11-30 01:31:47,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:31:47,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:31:47,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-30 01:31:47,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:31:47,812 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:31:47,813 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614059463] [2020-11-30 01:31:47,813 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 01:31:47,813 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-30 01:31:47,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698332144] [2020-11-30 01:31:47,814 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-30 01:31:47,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:31:47,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-30 01:31:47,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-30 01:31:47,815 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand 4 states. [2020-11-30 01:31:47,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:31:47,925 INFO L93 Difference]: Finished difference Result 36 states and 42 transitions. [2020-11-30 01:31:47,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-30 01:31:47,925 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2020-11-30 01:31:47,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:31:47,926 INFO L225 Difference]: With dead ends: 36 [2020-11-30 01:31:47,927 INFO L226 Difference]: Without dead ends: 36 [2020-11-30 01:31:47,927 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-30 01:31:47,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-11-30 01:31:47,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-11-30 01:31:47,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-11-30 01:31:47,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2020-11-30 01:31:47,931 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 20 [2020-11-30 01:31:47,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:31:47,931 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2020-11-30 01:31:47,932 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-30 01:31:47,932 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2020-11-30 01:31:47,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-11-30 01:31:47,933 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:31:47,933 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] [2020-11-30 01:31:47,933 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-11-30 01:31:47,933 INFO L429 AbstractCegarLoop]: === Iteration 10 === [cstrnlenErr0REQUIRES_VIOLATION, cstrnlenErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-30 01:31:47,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:31:47,934 INFO L82 PathProgramCache]: Analyzing trace with hash 964873536, now seen corresponding path program 1 times [2020-11-30 01:31:47,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:31:47,934 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764851278] [2020-11-30 01:31:47,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:31:47,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:31:48,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-30 01:31:48,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:31:48,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-11-30 01:31:48,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:31:48,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:31:48,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764851278] [2020-11-30 01:31:48,119 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 01:31:48,119 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-11-30 01:31:48,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026905036] [2020-11-30 01:31:48,120 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-30 01:31:48,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:31:48,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-30 01:31:48,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-11-30 01:31:48,121 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand 7 states. [2020-11-30 01:31:48,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:31:48,402 INFO L93 Difference]: Finished difference Result 58 states and 67 transitions. [2020-11-30 01:31:48,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-30 01:31:48,402 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 21 [2020-11-30 01:31:48,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:31:48,404 INFO L225 Difference]: With dead ends: 58 [2020-11-30 01:31:48,404 INFO L226 Difference]: Without dead ends: 58 [2020-11-30 01:31:48,404 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-11-30 01:31:48,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-11-30 01:31:48,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 49. [2020-11-30 01:31:48,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-11-30 01:31:48,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2020-11-30 01:31:48,420 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 21 [2020-11-30 01:31:48,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:31:48,420 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2020-11-30 01:31:48,421 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-30 01:31:48,421 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2020-11-30 01:31:48,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-11-30 01:31:48,426 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:31:48,426 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] [2020-11-30 01:31:48,426 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-11-30 01:31:48,426 INFO L429 AbstractCegarLoop]: === Iteration 11 === [cstrnlenErr0REQUIRES_VIOLATION, cstrnlenErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-30 01:31:48,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:31:48,427 INFO L82 PathProgramCache]: Analyzing trace with hash -46243714, now seen corresponding path program 1 times [2020-11-30 01:31:48,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:31:48,428 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348806312] [2020-11-30 01:31:48,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:31:48,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:31:48,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-30 01:31:48,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:31:48,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-11-30 01:31:48,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:31:48,602 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:31:48,603 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348806312] [2020-11-30 01:31:48,603 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 01:31:48,603 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-11-30 01:31:48,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11779083] [2020-11-30 01:31:48,604 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-30 01:31:48,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:31:48,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-30 01:31:48,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-11-30 01:31:48,605 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand 8 states. [2020-11-30 01:31:48,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:31:48,851 INFO L93 Difference]: Finished difference Result 55 states and 64 transitions. [2020-11-30 01:31:48,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-30 01:31:48,852 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 21 [2020-11-30 01:31:48,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:31:48,853 INFO L225 Difference]: With dead ends: 55 [2020-11-30 01:31:48,853 INFO L226 Difference]: Without dead ends: 51 [2020-11-30 01:31:48,853 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2020-11-30 01:31:48,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-11-30 01:31:48,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 36. [2020-11-30 01:31:48,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-11-30 01:31:48,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2020-11-30 01:31:48,859 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 21 [2020-11-30 01:31:48,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:31:48,859 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2020-11-30 01:31:48,859 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-30 01:31:48,859 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2020-11-30 01:31:48,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-11-30 01:31:48,860 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:31:48,860 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:31:48,860 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-11-30 01:31:48,860 INFO L429 AbstractCegarLoop]: === Iteration 12 === [cstrnlenErr0REQUIRES_VIOLATION, cstrnlenErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-30 01:31:48,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:31:48,861 INFO L82 PathProgramCache]: Analyzing trace with hash -1827219927, now seen corresponding path program 1 times [2020-11-30 01:31:48,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:31:48,861 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370783161] [2020-11-30 01:31:48,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:31:48,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:31:49,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-30 01:31:49,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:31:49,023 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:31:49,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370783161] [2020-11-30 01:31:49,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286498953] [2020-11-30 01:31:49,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_08ed49bb-2dda-4220-b191-3ae1359e6f78/bin/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:31:49,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:31:49,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-30 01:31:49,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:31:49,227 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-30 01:31:49,246 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:31:49,249 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 01:31:49,249 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2020-11-30 01:31:49,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651986082] [2020-11-30 01:31:49,250 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-30 01:31:49,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:31:49,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-30 01:31:49,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-11-30 01:31:49,255 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand 9 states. [2020-11-30 01:31:49,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:31:49,619 INFO L93 Difference]: Finished difference Result 64 states and 70 transitions. [2020-11-30 01:31:49,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-30 01:31:49,620 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 22 [2020-11-30 01:31:49,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:31:49,621 INFO L225 Difference]: With dead ends: 64 [2020-11-30 01:31:49,621 INFO L226 Difference]: Without dead ends: 64 [2020-11-30 01:31:49,621 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-11-30 01:31:49,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-11-30 01:31:49,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 58. [2020-11-30 01:31:49,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-11-30 01:31:49,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 65 transitions. [2020-11-30 01:31:49,626 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 65 transitions. Word has length 22 [2020-11-30 01:31:49,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:31:49,631 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 65 transitions. [2020-11-30 01:31:49,631 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-30 01:31:49,631 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 65 transitions. [2020-11-30 01:31:49,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-11-30 01:31:49,635 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:31:49,636 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:31:49,848 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-11-30 01:31:49,848 INFO L429 AbstractCegarLoop]: === Iteration 13 === [cstrnlenErr0REQUIRES_VIOLATION, cstrnlenErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-30 01:31:49,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:31:49,849 INFO L82 PathProgramCache]: Analyzing trace with hash 1187883691, now seen corresponding path program 1 times [2020-11-30 01:31:49,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:31:49,849 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437011560] [2020-11-30 01:31:49,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:31:49,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:31:50,055 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-30 01:31:50,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:31:50,059 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:31:50,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437011560] [2020-11-30 01:31:50,060 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 01:31:50,060 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-11-30 01:31:50,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260233656] [2020-11-30 01:31:50,061 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-30 01:31:50,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:31:50,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-30 01:31:50,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-11-30 01:31:50,061 INFO L87 Difference]: Start difference. First operand 58 states and 65 transitions. Second operand 10 states. [2020-11-30 01:31:50,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:31:50,376 INFO L93 Difference]: Finished difference Result 83 states and 89 transitions. [2020-11-30 01:31:50,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-30 01:31:50,377 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 22 [2020-11-30 01:31:50,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:31:50,378 INFO L225 Difference]: With dead ends: 83 [2020-11-30 01:31:50,378 INFO L226 Difference]: Without dead ends: 83 [2020-11-30 01:31:50,379 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2020-11-30 01:31:50,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-11-30 01:31:50,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 67. [2020-11-30 01:31:50,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-11-30 01:31:50,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 74 transitions. [2020-11-30 01:31:50,383 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 74 transitions. Word has length 22 [2020-11-30 01:31:50,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:31:50,383 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 74 transitions. [2020-11-30 01:31:50,383 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-30 01:31:50,383 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 74 transitions. [2020-11-30 01:31:50,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-11-30 01:31:50,384 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:31:50,384 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:31:50,384 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-11-30 01:31:50,384 INFO L429 AbstractCegarLoop]: === Iteration 14 === [cstrnlenErr0REQUIRES_VIOLATION, cstrnlenErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-30 01:31:50,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:31:50,384 INFO L82 PathProgramCache]: Analyzing trace with hash 166815337, now seen corresponding path program 1 times [2020-11-30 01:31:50,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:31:50,384 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570534539] [2020-11-30 01:31:50,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:31:50,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:31:50,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-30 01:31:50,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:31:50,644 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:31:50,646 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570534539] [2020-11-30 01:31:50,647 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 01:31:50,647 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-11-30 01:31:50,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669721799] [2020-11-30 01:31:50,652 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-30 01:31:50,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:31:50,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-30 01:31:50,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-11-30 01:31:50,654 INFO L87 Difference]: Start difference. First operand 67 states and 74 transitions. Second operand 11 states. [2020-11-30 01:31:50,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:31:50,992 INFO L93 Difference]: Finished difference Result 100 states and 108 transitions. [2020-11-30 01:31:50,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-30 01:31:50,993 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 22 [2020-11-30 01:31:50,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:31:50,994 INFO L225 Difference]: With dead ends: 100 [2020-11-30 01:31:50,994 INFO L226 Difference]: Without dead ends: 100 [2020-11-30 01:31:50,994 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2020-11-30 01:31:50,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-11-30 01:31:50,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 69. [2020-11-30 01:31:50,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-11-30 01:31:51,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 78 transitions. [2020-11-30 01:31:51,006 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 78 transitions. Word has length 22 [2020-11-30 01:31:51,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:31:51,009 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 78 transitions. [2020-11-30 01:31:51,009 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-30 01:31:51,009 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 78 transitions. [2020-11-30 01:31:51,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-11-30 01:31:51,012 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:31:51,012 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] [2020-11-30 01:31:51,014 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-11-30 01:31:51,014 INFO L429 AbstractCegarLoop]: === Iteration 15 === [cstrnlenErr0REQUIRES_VIOLATION, cstrnlenErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-30 01:31:51,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:31:51,014 INFO L82 PathProgramCache]: Analyzing trace with hash -862082627, now seen corresponding path program 1 times [2020-11-30 01:31:51,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:31:51,015 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847925844] [2020-11-30 01:31:51,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:31:51,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:31:51,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-30 01:31:51,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:31:51,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-11-30 01:31:51,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:31:51,078 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:31:51,078 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847925844] [2020-11-30 01:31:51,079 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 01:31:51,079 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-30 01:31:51,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602433788] [2020-11-30 01:31:51,079 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-30 01:31:51,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:31:51,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-30 01:31:51,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-11-30 01:31:51,081 INFO L87 Difference]: Start difference. First operand 69 states and 78 transitions. Second operand 5 states. [2020-11-30 01:31:51,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:31:51,143 INFO L93 Difference]: Finished difference Result 68 states and 77 transitions. [2020-11-30 01:31:51,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-30 01:31:51,144 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2020-11-30 01:31:51,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:31:51,145 INFO L225 Difference]: With dead ends: 68 [2020-11-30 01:31:51,145 INFO L226 Difference]: Without dead ends: 27 [2020-11-30 01:31:51,145 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-11-30 01:31:51,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-11-30 01:31:51,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-11-30 01:31:51,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-11-30 01:31:51,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-11-30 01:31:51,147 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 23 [2020-11-30 01:31:51,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:31:51,147 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-11-30 01:31:51,148 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-30 01:31:51,148 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-11-30 01:31:51,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-11-30 01:31:51,148 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:31:51,148 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:31:51,148 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-11-30 01:31:51,149 INFO L429 AbstractCegarLoop]: === Iteration 16 === [cstrnlenErr0REQUIRES_VIOLATION, cstrnlenErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-30 01:31:51,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:31:51,149 INFO L82 PathProgramCache]: Analyzing trace with hash 869619206, now seen corresponding path program 1 times [2020-11-30 01:31:51,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:31:51,149 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229962664] [2020-11-30 01:31:51,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:31:51,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:31:51,255 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-30 01:31:51,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:31:51,260 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:31:51,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229962664] [2020-11-30 01:31:51,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280193359] [2020-11-30 01:31:51,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_08ed49bb-2dda-4220-b191-3ae1359e6f78/bin/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:31:51,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:31:51,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 20 conjunts are in the unsatisfiable core [2020-11-30 01:31:51,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:31:51,597 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:31:51,597 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 01:31:51,597 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 13 [2020-11-30 01:31:51,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927962822] [2020-11-30 01:31:51,598 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-30 01:31:51,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:31:51,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-30 01:31:51,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2020-11-30 01:31:51,599 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 14 states. [2020-11-30 01:31:51,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:31:51,919 INFO L93 Difference]: Finished difference Result 39 states and 40 transitions. [2020-11-30 01:31:51,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-30 01:31:51,920 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 26 [2020-11-30 01:31:51,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:31:51,920 INFO L225 Difference]: With dead ends: 39 [2020-11-30 01:31:51,920 INFO L226 Difference]: Without dead ends: 39 [2020-11-30 01:31:51,921 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2020-11-30 01:31:51,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-11-30 01:31:51,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 33. [2020-11-30 01:31:51,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-11-30 01:31:51,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-11-30 01:31:51,924 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 26 [2020-11-30 01:31:51,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:31:51,924 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-11-30 01:31:51,924 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-11-30 01:31:51,924 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-11-30 01:31:51,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-11-30 01:31:51,925 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:31:51,925 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:31:52,125 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-11-30 01:31:52,126 INFO L429 AbstractCegarLoop]: === Iteration 17 === [cstrnlenErr0REQUIRES_VIOLATION, cstrnlenErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-30 01:31:52,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:31:52,127 INFO L82 PathProgramCache]: Analyzing trace with hash -2038559330, now seen corresponding path program 2 times [2020-11-30 01:31:52,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:31:52,127 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870066006] [2020-11-30 01:31:52,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:31:52,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:31:52,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-30 01:31:52,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:31:52,510 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:31:52,510 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870066006] [2020-11-30 01:31:52,510 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760195535] [2020-11-30 01:31:52,510 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_08ed49bb-2dda-4220-b191-3ae1359e6f78/bin/uautomizer/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:31:52,685 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-30 01:31:52,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 01:31:52,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 28 conjunts are in the unsatisfiable core [2020-11-30 01:31:52,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:31:52,803 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2020-11-30 01:31:52,803 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-30 01:31:52,811 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 01:31:52,814 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-11-30 01:31:52,814 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:17 [2020-11-30 01:31:53,103 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 01:31:53,103 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2020-11-30 01:31:53,104 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-11-30 01:31:53,119 INFO L625 ElimStorePlain]: treesize reduction 8, result has 55.6 percent of original size [2020-11-30 01:31:53,121 INFO L545 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-30 01:31:53,122 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:24, output treesize:3 [2020-11-30 01:31:53,127 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:31:53,127 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 01:31:53,128 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2020-11-30 01:31:53,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719103060] [2020-11-30 01:31:53,128 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-30 01:31:53,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:31:53,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-30 01:31:53,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2020-11-30 01:31:53,129 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 21 states. [2020-11-30 01:31:53,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:31:53,717 INFO L93 Difference]: Finished difference Result 54 states and 55 transitions. [2020-11-30 01:31:53,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-30 01:31:53,718 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 32 [2020-11-30 01:31:53,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:31:53,719 INFO L225 Difference]: With dead ends: 54 [2020-11-30 01:31:53,719 INFO L226 Difference]: Without dead ends: 40 [2020-11-30 01:31:53,720 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=118, Invalid=694, Unknown=0, NotChecked=0, Total=812 [2020-11-30 01:31:53,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-11-30 01:31:53,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 37. [2020-11-30 01:31:53,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-11-30 01:31:53,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2020-11-30 01:31:53,724 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 32 [2020-11-30 01:31:53,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:31:53,724 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2020-11-30 01:31:53,724 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-11-30 01:31:53,724 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2020-11-30 01:31:53,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-11-30 01:31:53,725 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:31:53,725 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:31:53,925 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:31:53,926 INFO L429 AbstractCegarLoop]: === Iteration 18 === [cstrnlenErr0REQUIRES_VIOLATION, cstrnlenErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-30 01:31:53,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:31:53,926 INFO L82 PathProgramCache]: Analyzing trace with hash -1010508549, now seen corresponding path program 3 times [2020-11-30 01:31:53,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:31:53,927 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84078307] [2020-11-30 01:31:53,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:31:53,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:31:54,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-30 01:31:54,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:31:54,093 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:31:54,094 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84078307] [2020-11-30 01:31:54,094 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812333982] [2020-11-30 01:31:54,094 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_08ed49bb-2dda-4220-b191-3ae1359e6f78/bin/uautomizer/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:31:54,210 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-11-30 01:31:54,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 01:31:54,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 24 conjunts are in the unsatisfiable core [2020-11-30 01:31:54,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:31:54,418 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:31:54,419 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 01:31:54,419 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2020-11-30 01:31:54,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73359497] [2020-11-30 01:31:54,420 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-30 01:31:54,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:31:54,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-30 01:31:54,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2020-11-30 01:31:54,421 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand 19 states. [2020-11-30 01:31:54,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:31:54,777 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2020-11-30 01:31:54,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-30 01:31:54,778 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 36 [2020-11-30 01:31:54,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:31:54,778 INFO L225 Difference]: With dead ends: 46 [2020-11-30 01:31:54,778 INFO L226 Difference]: Without dead ends: 46 [2020-11-30 01:31:54,779 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2020-11-30 01:31:54,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-11-30 01:31:54,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 43. [2020-11-30 01:31:54,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-11-30 01:31:54,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2020-11-30 01:31:54,782 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 36 [2020-11-30 01:31:54,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:31:54,782 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2020-11-30 01:31:54,782 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-11-30 01:31:54,782 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2020-11-30 01:31:54,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-11-30 01:31:54,783 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:31:54,783 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:31:54,983 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-11-30 01:31:54,984 INFO L429 AbstractCegarLoop]: === Iteration 19 === [cstrnlenErr0REQUIRES_VIOLATION, cstrnlenErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-30 01:31:54,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:31:54,984 INFO L82 PathProgramCache]: Analyzing trace with hash 1250412755, now seen corresponding path program 4 times [2020-11-30 01:31:54,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:31:54,984 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860872282] [2020-11-30 01:31:54,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:31:55,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:31:55,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-30 01:31:55,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:31:55,273 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 11 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:31:55,274 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860872282] [2020-11-30 01:31:55,274 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506958106] [2020-11-30 01:31:55,274 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_08ed49bb-2dda-4220-b191-3ae1359e6f78/bin/uautomizer/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:31:55,400 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-30 01:31:55,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 01:31:55,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 30 conjunts are in the unsatisfiable core [2020-11-30 01:31:55,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:31:55,426 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 [2020-11-30 01:31:55,426 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-30 01:31:55,434 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 01:31:55,434 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-30 01:31:55,434 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2020-11-30 01:31:55,554 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2020-11-30 01:31:55,555 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-30 01:31:55,560 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 01:31:55,560 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-30 01:31:55,560 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:17 [2020-11-30 01:31:55,790 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2020-11-30 01:31:55,792 INFO L545 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-11-30 01:31:55,802 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 01:31:55,808 INFO L173 IndexEqualityManager]: detected equality via solver [2020-11-30 01:31:55,810 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 01:31:55,810 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2020-11-30 01:31:55,811 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-11-30 01:31:55,818 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 01:31:55,821 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-30 01:31:55,821 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:34, output treesize:3 [2020-11-30 01:31:55,829 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 23 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:31:55,829 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 01:31:55,829 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 25 [2020-11-30 01:31:55,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754722686] [2020-11-30 01:31:55,830 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-11-30 01:31:55,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:31:55,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-11-30 01:31:55,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=543, Unknown=0, NotChecked=0, Total=600 [2020-11-30 01:31:55,836 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand 25 states. [2020-11-30 01:31:56,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:31:56,932 INFO L93 Difference]: Finished difference Result 70 states and 71 transitions. [2020-11-30 01:31:56,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-11-30 01:31:56,933 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 42 [2020-11-30 01:31:56,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:31:56,933 INFO L225 Difference]: With dead ends: 70 [2020-11-30 01:31:56,933 INFO L226 Difference]: Without dead ends: 50 [2020-11-30 01:31:56,934 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=161, Invalid=1171, Unknown=0, NotChecked=0, Total=1332 [2020-11-30 01:31:56,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-11-30 01:31:56,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 47. [2020-11-30 01:31:56,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-11-30 01:31:56,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2020-11-30 01:31:56,938 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 42 [2020-11-30 01:31:56,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:31:56,938 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2020-11-30 01:31:56,938 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-11-30 01:31:56,938 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2020-11-30 01:31:56,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-11-30 01:31:56,939 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:31:56,939 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:31:57,139 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:31:57,140 INFO L429 AbstractCegarLoop]: === Iteration 20 === [cstrnlenErr0REQUIRES_VIOLATION, cstrnlenErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-30 01:31:57,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:31:57,140 INFO L82 PathProgramCache]: Analyzing trace with hash 736937968, now seen corresponding path program 5 times [2020-11-30 01:31:57,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:31:57,141 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068560565] [2020-11-30 01:31:57,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:31:57,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:31:57,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-30 01:31:57,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:31:57,331 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 1 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:31:57,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068560565] [2020-11-30 01:31:57,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552161223] [2020-11-30 01:31:57,332 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_08ed49bb-2dda-4220-b191-3ae1359e6f78/bin/uautomizer/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:31:57,463 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-11-30 01:31:57,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 01:31:57,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 36 conjunts are in the unsatisfiable core [2020-11-30 01:31:57,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:31:57,494 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 [2020-11-30 01:31:57,494 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-30 01:31:57,501 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 01:31:57,501 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-30 01:31:57,501 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2020-11-30 01:31:57,600 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:31:57,601 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 01:31:57,601 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 15 [2020-11-30 01:31:57,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183766466] [2020-11-30 01:31:57,601 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-30 01:31:57,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:31:57,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-30 01:31:57,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2020-11-30 01:31:57,603 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand 16 states. [2020-11-30 01:31:58,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:31:58,045 INFO L93 Difference]: Finished difference Result 56 states and 57 transitions. [2020-11-30 01:31:58,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-30 01:31:58,047 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 46 [2020-11-30 01:31:58,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:31:58,048 INFO L225 Difference]: With dead ends: 56 [2020-11-30 01:31:58,048 INFO L226 Difference]: Without dead ends: 56 [2020-11-30 01:31:58,048 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2020-11-30 01:31:58,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-11-30 01:31:58,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 53. [2020-11-30 01:31:58,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-11-30 01:31:58,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2020-11-30 01:31:58,051 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 46 [2020-11-30 01:31:58,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:31:58,052 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2020-11-30 01:31:58,052 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-11-30 01:31:58,052 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2020-11-30 01:31:58,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-11-30 01:31:58,052 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:31:58,053 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:31:58,263 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:31:58,263 INFO L429 AbstractCegarLoop]: === Iteration 21 === [cstrnlenErr0REQUIRES_VIOLATION, cstrnlenErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-30 01:31:58,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:31:58,264 INFO L82 PathProgramCache]: Analyzing trace with hash -873535480, now seen corresponding path program 6 times [2020-11-30 01:31:58,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:31:58,264 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005372095] [2020-11-30 01:31:58,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:31:58,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:31:58,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-30 01:31:58,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:31:58,619 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 15 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:31:58,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005372095] [2020-11-30 01:31:58,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826245850] [2020-11-30 01:31:58,620 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_08ed49bb-2dda-4220-b191-3ae1359e6f78/bin/uautomizer/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:31:58,752 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-11-30 01:31:58,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 01:31:58,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 31 conjunts are in the unsatisfiable core [2020-11-30 01:31:58,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:31:58,770 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 [2020-11-30 01:31:58,770 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-30 01:31:58,774 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 01:31:58,775 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-30 01:31:58,775 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2020-11-30 01:31:58,802 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2020-11-30 01:31:58,802 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-30 01:31:58,804 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 01:31:58,805 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-30 01:31:58,805 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:11 [2020-11-30 01:31:58,892 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 01:31:58,892 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2020-11-30 01:31:58,892 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-11-30 01:31:58,899 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 01:31:58,900 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-30 01:31:58,900 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:23 [2020-11-30 01:31:58,937 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-30 01:31:58,942 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-30 01:31:59,077 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2020-11-30 01:31:59,078 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 01:31:59,078 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 9] total 25 [2020-11-30 01:31:59,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686064706] [2020-11-30 01:31:59,079 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-11-30 01:31:59,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:31:59,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-11-30 01:31:59,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=550, Unknown=0, NotChecked=0, Total=600 [2020-11-30 01:31:59,083 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand 25 states. [2020-11-30 01:32:01,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:32:01,209 INFO L93 Difference]: Finished difference Result 85 states and 86 transitions. [2020-11-30 01:32:01,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-11-30 01:32:01,209 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 52 [2020-11-30 01:32:01,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:32:01,209 INFO L225 Difference]: With dead ends: 85 [2020-11-30 01:32:01,210 INFO L226 Difference]: Without dead ends: 0 [2020-11-30 01:32:01,211 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 469 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=443, Invalid=2863, Unknown=0, NotChecked=0, Total=3306 [2020-11-30 01:32:01,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-30 01:32:01,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-30 01:32:01,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-30 01:32:01,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-30 01:32:01,212 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 52 [2020-11-30 01:32:01,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:32:01,212 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-30 01:32:01,212 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-11-30 01:32:01,212 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-30 01:32:01,212 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-30 01:32:01,412 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-11-30 01:32:01,416 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.11 01:32:01 BoogieIcfgContainer [2020-11-30 01:32:01,417 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-30 01:32:01,417 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-30 01:32:01,417 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-30 01:32:01,418 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-30 01:32:01,418 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 01:31:43" (3/4) ... [2020-11-30 01:32:01,422 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-11-30 01:32:01,429 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2020-11-30 01:32:01,429 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __bswap_32 [2020-11-30 01:32:01,429 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure cstrnlen [2020-11-30 01:32:01,429 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __bswap_64 [2020-11-30 01:32:01,430 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __uint16_identity [2020-11-30 01:32:01,430 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __uint64_identity [2020-11-30 01:32:01,430 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2020-11-30 01:32:01,430 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __uint32_identity [2020-11-30 01:32:01,435 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 13 nodes and edges [2020-11-30 01:32:01,435 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2020-11-30 01:32:01,435 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-30 01:32:01,436 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-30 01:32:01,493 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_08ed49bb-2dda-4220-b191-3ae1359e6f78/bin/uautomizer/witness.graphml [2020-11-30 01:32:01,493 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-30 01:32:01,495 INFO L168 Benchmark]: Toolchain (without parser) took 19053.79 ms. Allocated memory was 104.9 MB in the beginning and 211.8 MB in the end (delta: 107.0 MB). Free memory was 68.9 MB in the beginning and 83.7 MB in the end (delta: -14.8 MB). Peak memory consumption was 92.1 MB. Max. memory is 16.1 GB. [2020-11-30 01:32:01,495 INFO L168 Benchmark]: CDTParser took 1.00 ms. Allocated memory is still 104.9 MB. Free memory was 77.7 MB in the beginning and 77.6 MB in the end (delta: 27.3 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 01:32:01,496 INFO L168 Benchmark]: CACSL2BoogieTranslator took 613.98 ms. Allocated memory is still 104.9 MB. Free memory was 68.6 MB in the beginning and 69.7 MB in the end (delta: -1.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-11-30 01:32:01,496 INFO L168 Benchmark]: Boogie Preprocessor took 102.30 ms. Allocated memory is still 104.9 MB. Free memory was 69.7 MB in the beginning and 67.6 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-30 01:32:01,497 INFO L168 Benchmark]: RCFGBuilder took 783.16 ms. Allocated memory was 104.9 MB in the beginning and 146.8 MB in the end (delta: 41.9 MB). Free memory was 67.6 MB in the beginning and 117.4 MB in the end (delta: -49.9 MB). Peak memory consumption was 39.6 MB. Max. memory is 16.1 GB. [2020-11-30 01:32:01,497 INFO L168 Benchmark]: TraceAbstraction took 17469.41 ms. Allocated memory was 146.8 MB in the beginning and 211.8 MB in the end (delta: 65.0 MB). Free memory was 116.4 MB in the beginning and 86.5 MB in the end (delta: 29.8 MB). Peak memory consumption was 94.5 MB. Max. memory is 16.1 GB. [2020-11-30 01:32:01,498 INFO L168 Benchmark]: Witness Printer took 76.37 ms. Allocated memory is still 211.8 MB. Free memory was 86.5 MB in the beginning and 83.7 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-30 01:32:01,500 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.00 ms. Allocated memory is still 104.9 MB. Free memory was 77.7 MB in the beginning and 77.6 MB in the end (delta: 27.3 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 613.98 ms. Allocated memory is still 104.9 MB. Free memory was 68.6 MB in the beginning and 69.7 MB in the end (delta: -1.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 102.30 ms. Allocated memory is still 104.9 MB. Free memory was 69.7 MB in the beginning and 67.6 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 783.16 ms. Allocated memory was 104.9 MB in the beginning and 146.8 MB in the end (delta: 41.9 MB). Free memory was 67.6 MB in the beginning and 117.4 MB in the end (delta: -49.9 MB). Peak memory consumption was 39.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 17469.41 ms. Allocated memory was 146.8 MB in the beginning and 211.8 MB in the end (delta: 65.0 MB). Free memory was 116.4 MB in the beginning and 86.5 MB in the end (delta: 29.8 MB). Peak memory consumption was 94.5 MB. Max. memory is 16.1 GB. * Witness Printer took 76.37 ms. Allocated memory is still 211.8 MB. Free memory was 86.5 MB in the beginning and 83.7 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 517]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 517]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 537]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 537]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 521]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 534]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 534]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - AllSpecificationsHoldResult: All specifications hold 7 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 9 procedures, 52 locations, 7 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 17.3s, OverallIterations: 21, TraceHistogramMax: 5, AutomataDifference: 8.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 519 SDtfs, 1064 SDslu, 950 SDs, 0 SdLazy, 3810 SolverSat, 190 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 561 GetRequests, 269 SyntacticMatches, 5 SemanticMatches, 287 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 953 ImplicationChecksByTransitivity, 6.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=69occurred in iteration=14, 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, 21 MinimizatonAttempts, 122 StatesRemovedByMinimization, 14 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 5.1s InterpolantComputationTime, 758 NumberOfCodeBlocks, 751 NumberOfCodeBlocksAsserted, 39 NumberOfCheckSat, 729 ConstructedInterpolants, 11 QuantifiedInterpolants, 168010 SizeOfPredicates, 58 NumberOfNonLiveVariables, 996 ConjunctsInSsa, 190 ConjunctsInUnsatCore, 29 InterpolantComputations, 13 PerfectInterpolantSequences, 124/364 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 correct! Received shutdown request...