./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/rec_strlen-alloca_true-valid-memsafety_true-termination.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 0cd3be1d Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_65db4966-362b-4d9c-a00a-989961cf3c83/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_65db4966-362b-4d9c-a00a-989961cf3c83/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_65db4966-362b-4d9c-a00a-989961cf3c83/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_65db4966-362b-4d9c-a00a-989961cf3c83/bin-2019/uautomizer/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/rec_strlen-alloca_true-valid-memsafety_true-termination.i -s /tmp/vcloud-vcloud-master/worker/working_dir_65db4966-362b-4d9c-a00a-989961cf3c83/bin-2019/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_65db4966-362b-4d9c-a00a-989961cf3c83/bin-2019/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 1f736ad3d73bcf44f292b11858e0429161a038cf ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-0cd3be1 [2018-11-28 13:04:33,995 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-28 13:04:33,996 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-28 13:04:34,002 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-28 13:04:34,003 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-28 13:04:34,003 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-28 13:04:34,004 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-28 13:04:34,005 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-28 13:04:34,006 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-28 13:04:34,007 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-28 13:04:34,008 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-28 13:04:34,008 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-28 13:04:34,008 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-28 13:04:34,009 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-28 13:04:34,010 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-28 13:04:34,010 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-28 13:04:34,010 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-28 13:04:34,012 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-28 13:04:34,013 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-28 13:04:34,014 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-28 13:04:34,014 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-28 13:04:34,015 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-28 13:04:34,017 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-28 13:04:34,017 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-28 13:04:34,017 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-28 13:04:34,018 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-28 13:04:34,018 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-28 13:04:34,018 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-28 13:04:34,019 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-28 13:04:34,020 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-28 13:04:34,020 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-28 13:04:34,020 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-28 13:04:34,020 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-28 13:04:34,021 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-28 13:04:34,021 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-28 13:04:34,022 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-28 13:04:34,022 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_65db4966-362b-4d9c-a00a-989961cf3c83/bin-2019/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2018-11-28 13:04:34,029 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-28 13:04:34,029 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-28 13:04:34,030 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-28 13:04:34,030 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-11-28 13:04:34,030 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-28 13:04:34,030 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-28 13:04:34,030 INFO L133 SettingsManager]: * Use SBE=true [2018-11-28 13:04:34,030 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-28 13:04:34,031 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-28 13:04:34,031 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-11-28 13:04:34,031 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-28 13:04:34,031 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-28 13:04:34,031 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-28 13:04:34,031 INFO L133 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2018-11-28 13:04:34,031 INFO L133 SettingsManager]: * Bitprecise bitfields=true [2018-11-28 13:04:34,031 INFO L133 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2018-11-28 13:04:34,031 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-28 13:04:34,031 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-28 13:04:34,031 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-28 13:04:34,031 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-28 13:04:34,032 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-28 13:04:34,032 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-28 13:04:34,032 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-28 13:04:34,032 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-28 13:04:34,032 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-28 13:04:34,032 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-28 13:04:34,032 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-11-28 13:04:34,032 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-28 13:04:34,032 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in 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/working_dir_65db4966-362b-4d9c-a00a-989961cf3c83/bin-2019/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 -> 1f736ad3d73bcf44f292b11858e0429161a038cf [2018-11-28 13:04:34,055 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-28 13:04:34,062 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-28 13:04:34,064 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-28 13:04:34,065 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-28 13:04:34,065 INFO L276 PluginConnector]: CDTParser initialized [2018-11-28 13:04:34,066 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_65db4966-362b-4d9c-a00a-989961cf3c83/bin-2019/uautomizer/../../sv-benchmarks/c/array-memsafety/rec_strlen-alloca_true-valid-memsafety_true-termination.i [2018-11-28 13:04:34,103 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_65db4966-362b-4d9c-a00a-989961cf3c83/bin-2019/uautomizer/data/0b44d9926/34709cc4d0bf4995b484f8ad4b31671c/FLAGb79faa8c3 [2018-11-28 13:04:34,537 INFO L307 CDTParser]: Found 1 translation units. [2018-11-28 13:04:34,537 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_65db4966-362b-4d9c-a00a-989961cf3c83/sv-benchmarks/c/array-memsafety/rec_strlen-alloca_true-valid-memsafety_true-termination.i [2018-11-28 13:04:34,543 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_65db4966-362b-4d9c-a00a-989961cf3c83/bin-2019/uautomizer/data/0b44d9926/34709cc4d0bf4995b484f8ad4b31671c/FLAGb79faa8c3 [2018-11-28 13:04:34,553 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_65db4966-362b-4d9c-a00a-989961cf3c83/bin-2019/uautomizer/data/0b44d9926/34709cc4d0bf4995b484f8ad4b31671c [2018-11-28 13:04:34,556 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-28 13:04:34,557 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-28 13:04:34,558 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-28 13:04:34,558 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-28 13:04:34,561 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-28 13:04:34,562 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 01:04:34" (1/1) ... [2018-11-28 13:04:34,564 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b810661 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 01:04:34, skipping insertion in model container [2018-11-28 13:04:34,564 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 01:04:34" (1/1) ... [2018-11-28 13:04:34,568 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-28 13:04:34,592 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-28 13:04:34,767 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-11-28 13:04:34,776 INFO L191 MainTranslator]: Completed pre-run [2018-11-28 13:04:34,850 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-11-28 13:04:34,873 INFO L195 MainTranslator]: Completed translation [2018-11-28 13:04:34,873 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 01:04:34 WrapperNode [2018-11-28 13:04:34,873 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-28 13:04:34,874 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-28 13:04:34,874 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-28 13:04:34,874 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-28 13:04:34,882 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 01:04:34" (1/1) ... [2018-11-28 13:04:34,882 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 01:04:34" (1/1) ... [2018-11-28 13:04:34,891 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 01:04:34" (1/1) ... [2018-11-28 13:04:34,892 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 01:04:34" (1/1) ... [2018-11-28 13:04:34,901 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 01:04:34" (1/1) ... [2018-11-28 13:04:34,902 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 01:04:34" (1/1) ... [2018-11-28 13:04:34,904 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 01:04:34" (1/1) ... [2018-11-28 13:04:34,907 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-28 13:04:34,907 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-28 13:04:34,907 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-28 13:04:34,907 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-28 13:04:34,908 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 01:04:34" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_65db4966-362b-4d9c-a00a-989961cf3c83/bin-2019/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 [2018-11-28 13:04:34,943 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-28 13:04:34,944 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-28 13:04:34,944 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2018-11-28 13:04:34,944 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2018-11-28 13:04:34,944 INFO L138 BoogieDeclarations]: Found implementation of procedure strlen_rec [2018-11-28 13:04:34,944 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-28 13:04:34,944 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2018-11-28 13:04:34,944 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2018-11-28 13:04:34,944 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2018-11-28 13:04:34,944 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2018-11-28 13:04:34,944 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2018-11-28 13:04:34,944 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2018-11-28 13:04:34,945 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2018-11-28 13:04:34,945 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2018-11-28 13:04:34,945 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2018-11-28 13:04:34,945 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2018-11-28 13:04:34,945 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2018-11-28 13:04:34,945 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2018-11-28 13:04:34,945 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2018-11-28 13:04:34,945 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2018-11-28 13:04:34,946 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2018-11-28 13:04:34,946 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2018-11-28 13:04:34,946 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2018-11-28 13:04:34,946 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2018-11-28 13:04:34,946 INFO L130 BoogieDeclarations]: Found specification of procedure select [2018-11-28 13:04:34,946 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2018-11-28 13:04:34,946 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2018-11-28 13:04:34,946 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2018-11-28 13:04:34,946 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2018-11-28 13:04:34,947 INFO L130 BoogieDeclarations]: Found specification of procedure random [2018-11-28 13:04:34,947 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2018-11-28 13:04:34,947 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2018-11-28 13:04:34,947 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2018-11-28 13:04:34,947 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2018-11-28 13:04:34,947 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2018-11-28 13:04:34,947 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2018-11-28 13:04:34,947 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2018-11-28 13:04:34,947 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2018-11-28 13:04:34,948 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2018-11-28 13:04:34,948 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2018-11-28 13:04:34,948 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2018-11-28 13:04:34,948 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2018-11-28 13:04:34,948 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2018-11-28 13:04:34,948 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2018-11-28 13:04:34,948 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2018-11-28 13:04:34,948 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2018-11-28 13:04:34,948 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2018-11-28 13:04:34,948 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2018-11-28 13:04:34,949 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2018-11-28 13:04:34,949 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2018-11-28 13:04:34,949 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2018-11-28 13:04:34,949 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2018-11-28 13:04:34,949 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2018-11-28 13:04:34,949 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2018-11-28 13:04:34,949 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2018-11-28 13:04:34,949 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2018-11-28 13:04:34,949 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2018-11-28 13:04:34,950 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2018-11-28 13:04:34,950 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2018-11-28 13:04:34,950 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2018-11-28 13:04:34,950 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2018-11-28 13:04:34,950 INFO L130 BoogieDeclarations]: Found specification of procedure free [2018-11-28 13:04:34,950 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2018-11-28 13:04:34,950 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2018-11-28 13:04:34,950 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2018-11-28 13:04:34,950 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2018-11-28 13:04:34,951 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2018-11-28 13:04:34,951 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2018-11-28 13:04:34,951 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2018-11-28 13:04:34,951 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-11-28 13:04:34,951 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2018-11-28 13:04:34,951 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2018-11-28 13:04:34,951 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2018-11-28 13:04:34,951 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2018-11-28 13:04:34,951 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2018-11-28 13:04:34,952 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2018-11-28 13:04:34,952 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2018-11-28 13:04:34,952 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2018-11-28 13:04:34,952 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2018-11-28 13:04:34,952 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2018-11-28 13:04:34,952 INFO L130 BoogieDeclarations]: Found specification of procedure system [2018-11-28 13:04:34,952 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2018-11-28 13:04:34,952 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2018-11-28 13:04:34,952 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2018-11-28 13:04:34,952 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2018-11-28 13:04:34,953 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2018-11-28 13:04:34,953 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2018-11-28 13:04:34,953 INFO L130 BoogieDeclarations]: Found specification of procedure div [2018-11-28 13:04:34,953 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2018-11-28 13:04:34,953 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2018-11-28 13:04:34,953 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2018-11-28 13:04:34,953 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2018-11-28 13:04:34,953 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2018-11-28 13:04:34,953 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2018-11-28 13:04:34,954 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2018-11-28 13:04:34,954 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2018-11-28 13:04:34,954 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2018-11-28 13:04:34,954 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2018-11-28 13:04:34,954 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2018-11-28 13:04:34,954 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2018-11-28 13:04:34,954 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2018-11-28 13:04:34,954 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2018-11-28 13:04:34,954 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2018-11-28 13:04:34,954 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2018-11-28 13:04:34,955 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2018-11-28 13:04:34,955 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2018-11-28 13:04:34,955 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2018-11-28 13:04:34,955 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2018-11-28 13:04:34,955 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-11-28 13:04:34,955 INFO L130 BoogieDeclarations]: Found specification of procedure strlen_rec [2018-11-28 13:04:34,955 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2018-11-28 13:04:34,955 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-28 13:04:34,955 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-11-28 13:04:34,955 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2018-11-28 13:04:34,956 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-11-28 13:04:34,956 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-28 13:04:34,956 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-28 13:04:35,208 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-28 13:04:35,208 INFO L280 CfgBuilder]: Removed 0 assue(true) statements. [2018-11-28 13:04:35,208 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 01:04:35 BoogieIcfgContainer [2018-11-28 13:04:35,208 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-28 13:04:35,209 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-28 13:04:35,209 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-28 13:04:35,211 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-28 13:04:35,212 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 01:04:34" (1/3) ... [2018-11-28 13:04:35,212 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@794565f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 01:04:35, skipping insertion in model container [2018-11-28 13:04:35,212 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 01:04:34" (2/3) ... [2018-11-28 13:04:35,213 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@794565f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 01:04:35, skipping insertion in model container [2018-11-28 13:04:35,213 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 01:04:35" (3/3) ... [2018-11-28 13:04:35,214 INFO L112 eAbstractionObserver]: Analyzing ICFG rec_strlen-alloca_true-valid-memsafety_true-termination.i [2018-11-28 13:04:35,220 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-28 13:04:35,225 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 5 error locations. [2018-11-28 13:04:35,237 INFO L257 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2018-11-28 13:04:35,253 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-11-28 13:04:35,254 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-28 13:04:35,254 INFO L383 AbstractCegarLoop]: Hoare is false [2018-11-28 13:04:35,254 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-28 13:04:35,254 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-28 13:04:35,255 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-28 13:04:35,255 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-28 13:04:35,255 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-28 13:04:35,255 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-28 13:04:35,266 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2018-11-28 13:04:35,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-11-28 13:04:35,273 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:04:35,274 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 13:04:35,275 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr2ENSURES_VIOLATIONMEMORY_LEAK, mainErr1REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, strlen_recErr0REQUIRES_VIOLATION, strlen_recErr1REQUIRES_VIOLATION]=== [2018-11-28 13:04:35,278 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:04:35,278 INFO L82 PathProgramCache]: Analyzing trace with hash 1068560237, now seen corresponding path program 1 times [2018-11-28 13:04:35,279 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:04:35,279 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:04:35,315 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:04:35,315 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 13:04:35,315 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:04:35,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:04:35,386 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 13:04:35,387 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 13:04:35,387 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-11-28 13:04:35,389 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-28 13:04:35,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-28 13:04:35,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-28 13:04:35,399 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 3 states. [2018-11-28 13:04:35,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:04:35,428 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2018-11-28 13:04:35,428 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-28 13:04:35,429 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2018-11-28 13:04:35,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:04:35,435 INFO L225 Difference]: With dead ends: 26 [2018-11-28 13:04:35,435 INFO L226 Difference]: Without dead ends: 23 [2018-11-28 13:04:35,436 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-28 13:04:35,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-11-28 13:04:35,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-11-28 13:04:35,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-11-28 13:04:35,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2018-11-28 13:04:35,457 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 9 [2018-11-28 13:04:35,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:04:35,458 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2018-11-28 13:04:35,458 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-28 13:04:35,458 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2018-11-28 13:04:35,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-11-28 13:04:35,458 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:04:35,458 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 13:04:35,458 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr2ENSURES_VIOLATIONMEMORY_LEAK, mainErr1REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, strlen_recErr0REQUIRES_VIOLATION, strlen_recErr1REQUIRES_VIOLATION]=== [2018-11-28 13:04:35,459 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:04:35,459 INFO L82 PathProgramCache]: Analyzing trace with hash 1068560238, now seen corresponding path program 1 times [2018-11-28 13:04:35,459 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:04:35,459 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:04:35,459 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:04:35,460 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 13:04:35,460 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:04:35,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:04:35,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 13:04:35,507 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 13:04:35,507 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-28 13:04:35,508 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-28 13:04:35,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-28 13:04:35,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-28 13:04:35,508 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 4 states. [2018-11-28 13:04:35,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:04:35,523 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2018-11-28 13:04:35,523 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-28 13:04:35,523 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2018-11-28 13:04:35,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:04:35,524 INFO L225 Difference]: With dead ends: 22 [2018-11-28 13:04:35,524 INFO L226 Difference]: Without dead ends: 22 [2018-11-28 13:04:35,524 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-28 13:04:35,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-11-28 13:04:35,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-11-28 13:04:35,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-11-28 13:04:35,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2018-11-28 13:04:35,527 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 9 [2018-11-28 13:04:35,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:04:35,527 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2018-11-28 13:04:35,528 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-28 13:04:35,528 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2018-11-28 13:04:35,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-11-28 13:04:35,528 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:04:35,528 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 13:04:35,528 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr2ENSURES_VIOLATIONMEMORY_LEAK, mainErr1REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, strlen_recErr0REQUIRES_VIOLATION, strlen_recErr1REQUIRES_VIOLATION]=== [2018-11-28 13:04:35,528 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:04:35,528 INFO L82 PathProgramCache]: Analyzing trace with hash -819572967, now seen corresponding path program 1 times [2018-11-28 13:04:35,528 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:04:35,528 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:04:35,529 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:04:35,529 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 13:04:35,529 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:04:35,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:04:35,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 13:04:35,567 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 13:04:35,567 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-28 13:04:35,567 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-28 13:04:35,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-28 13:04:35,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-28 13:04:35,568 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 5 states. [2018-11-28 13:04:35,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:04:35,613 INFO L93 Difference]: Finished difference Result 21 states and 23 transitions. [2018-11-28 13:04:35,613 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-28 13:04:35,613 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2018-11-28 13:04:35,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:04:35,614 INFO L225 Difference]: With dead ends: 21 [2018-11-28 13:04:35,614 INFO L226 Difference]: Without dead ends: 21 [2018-11-28 13:04:35,614 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-11-28 13:04:35,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-11-28 13:04:35,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-11-28 13:04:35,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-11-28 13:04:35,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2018-11-28 13:04:35,617 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 12 [2018-11-28 13:04:35,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:04:35,617 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2018-11-28 13:04:35,617 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-28 13:04:35,617 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2018-11-28 13:04:35,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-11-28 13:04:35,618 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:04:35,618 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 13:04:35,618 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr2ENSURES_VIOLATIONMEMORY_LEAK, mainErr1REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, strlen_recErr0REQUIRES_VIOLATION, strlen_recErr1REQUIRES_VIOLATION]=== [2018-11-28 13:04:35,618 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:04:35,618 INFO L82 PathProgramCache]: Analyzing trace with hash -819572966, now seen corresponding path program 1 times [2018-11-28 13:04:35,618 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:04:35,619 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:04:35,619 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:04:35,619 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 13:04:35,619 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:04:35,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:04:35,683 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 13:04:35,683 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 13:04:35,683 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-28 13:04:35,683 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-28 13:04:35,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-28 13:04:35,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-11-28 13:04:35,684 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 7 states. [2018-11-28 13:04:35,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:04:35,714 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions. [2018-11-28 13:04:35,714 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-28 13:04:35,714 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2018-11-28 13:04:35,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:04:35,715 INFO L225 Difference]: With dead ends: 28 [2018-11-28 13:04:35,715 INFO L226 Difference]: Without dead ends: 28 [2018-11-28 13:04:35,715 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2018-11-28 13:04:35,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-11-28 13:04:35,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-11-28 13:04:35,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-11-28 13:04:35,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2018-11-28 13:04:35,720 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 12 [2018-11-28 13:04:35,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:04:35,720 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2018-11-28 13:04:35,721 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-28 13:04:35,721 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2018-11-28 13:04:35,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-11-28 13:04:35,721 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:04:35,721 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 13:04:35,721 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr2ENSURES_VIOLATIONMEMORY_LEAK, mainErr1REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, strlen_recErr0REQUIRES_VIOLATION, strlen_recErr1REQUIRES_VIOLATION]=== [2018-11-28 13:04:35,722 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:04:35,722 INFO L82 PathProgramCache]: Analyzing trace with hash 650529540, now seen corresponding path program 1 times [2018-11-28 13:04:35,722 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:04:35,722 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:04:35,722 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:04:35,723 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 13:04:35,723 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:04:35,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:04:35,831 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 13:04:35,831 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 13:04:35,831 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2018-11-28 13:04:35,832 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-28 13:04:35,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-28 13:04:35,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2018-11-28 13:04:35,832 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand 8 states. [2018-11-28 13:04:35,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:04:35,889 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2018-11-28 13:04:35,890 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-28 13:04:35,890 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 16 [2018-11-28 13:04:35,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:04:35,891 INFO L225 Difference]: With dead ends: 39 [2018-11-28 13:04:35,891 INFO L226 Difference]: Without dead ends: 39 [2018-11-28 13:04:35,891 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2018-11-28 13:04:35,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-11-28 13:04:35,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 36. [2018-11-28 13:04:35,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-11-28 13:04:35,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2018-11-28 13:04:35,895 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 16 [2018-11-28 13:04:35,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:04:35,895 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2018-11-28 13:04:35,895 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-28 13:04:35,895 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2018-11-28 13:04:35,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-11-28 13:04:35,896 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:04:35,896 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 13:04:35,896 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr2ENSURES_VIOLATIONMEMORY_LEAK, mainErr1REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, strlen_recErr0REQUIRES_VIOLATION, strlen_recErr1REQUIRES_VIOLATION]=== [2018-11-28 13:04:35,896 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:04:35,897 INFO L82 PathProgramCache]: Analyzing trace with hash 257502530, now seen corresponding path program 1 times [2018-11-28 13:04:35,897 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:04:35,897 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:04:35,897 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:04:35,897 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 13:04:35,898 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:04:35,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:04:36,049 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 13:04:36,050 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 13:04:36,050 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_65db4966-362b-4d9c-a00a-989961cf3c83/bin-2019/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 13:04:36,056 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 13:04:36,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:04:36,074 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 13:04:36,105 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 11 [2018-11-28 13:04:36,107 INFO L478 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 11 treesize of output 10 [2018-11-28 13:04:36,107 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-11-28 13:04:36,110 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-11-28 13:04:36,120 INFO L267 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. [2018-11-28 13:04:36,120 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:25, output treesize:21 [2018-11-28 13:04:36,196 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2018-11-28 13:04:36,205 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 11 [2018-11-28 13:04:36,205 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2018-11-28 13:04:36,210 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2018-11-28 13:04:36,223 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2018-11-28 13:04:36,224 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:34, output treesize:33 [2018-11-28 13:04:36,274 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 13:04:36,288 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 13:04:36,288 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2018-11-28 13:04:36,289 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-11-28 13:04:36,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-11-28 13:04:36,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2018-11-28 13:04:36,289 INFO L87 Difference]: Start difference. First operand 36 states and 39 transitions. Second operand 16 states. [2018-11-28 13:04:36,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:04:36,575 INFO L93 Difference]: Finished difference Result 45 states and 49 transitions. [2018-11-28 13:04:36,575 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-28 13:04:36,576 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 16 [2018-11-28 13:04:36,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:04:36,577 INFO L225 Difference]: With dead ends: 45 [2018-11-28 13:04:36,578 INFO L226 Difference]: Without dead ends: 45 [2018-11-28 13:04:36,578 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2018-11-28 13:04:36,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-11-28 13:04:36,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 43. [2018-11-28 13:04:36,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-11-28 13:04:36,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2018-11-28 13:04:36,584 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 16 [2018-11-28 13:04:36,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:04:36,585 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2018-11-28 13:04:36,585 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-11-28 13:04:36,585 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2018-11-28 13:04:36,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-11-28 13:04:36,585 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:04:36,586 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 13:04:36,586 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr2ENSURES_VIOLATIONMEMORY_LEAK, mainErr1REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, strlen_recErr0REQUIRES_VIOLATION, strlen_recErr1REQUIRES_VIOLATION]=== [2018-11-28 13:04:36,586 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:04:36,586 INFO L82 PathProgramCache]: Analyzing trace with hash -1309508822, now seen corresponding path program 1 times [2018-11-28 13:04:36,586 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:04:36,586 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:04:36,587 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:04:36,587 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 13:04:36,587 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:04:36,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:04:36,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 13:04:36,619 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 13:04:36,619 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-28 13:04:36,619 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-28 13:04:36,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-28 13:04:36,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-11-28 13:04:36,620 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand 4 states. [2018-11-28 13:04:36,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:04:36,662 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2018-11-28 13:04:36,662 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-28 13:04:36,662 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2018-11-28 13:04:36,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:04:36,662 INFO L225 Difference]: With dead ends: 42 [2018-11-28 13:04:36,662 INFO L226 Difference]: Without dead ends: 23 [2018-11-28 13:04:36,663 INFO L631 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 [2018-11-28 13:04:36,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-11-28 13:04:36,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2018-11-28 13:04:36,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-11-28 13:04:36,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-11-28 13:04:36,665 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 17 [2018-11-28 13:04:36,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:04:36,665 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2018-11-28 13:04:36,665 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-28 13:04:36,665 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2018-11-28 13:04:36,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-11-28 13:04:36,666 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:04:36,666 INFO L402 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 13:04:36,666 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr2ENSURES_VIOLATIONMEMORY_LEAK, mainErr1REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, strlen_recErr0REQUIRES_VIOLATION, strlen_recErr1REQUIRES_VIOLATION]=== [2018-11-28 13:04:36,666 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:04:36,666 INFO L82 PathProgramCache]: Analyzing trace with hash 948819244, now seen corresponding path program 2 times [2018-11-28 13:04:36,667 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:04:36,667 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:04:36,667 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:04:36,667 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 13:04:36,667 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:04:36,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:04:36,972 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 13:04:36,973 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 13:04:36,973 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_65db4966-362b-4d9c-a00a-989961cf3c83/bin-2019/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 13:04:36,982 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-28 13:04:36,997 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-28 13:04:36,997 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 13:04:37,000 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 13:04:37,004 INFO L478 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 [2018-11-28 13:04:37,004 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-11-28 13:04:37,008 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-11-28 13:04:37,009 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2018-11-28 13:04:37,026 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 13 [2018-11-28 13:04:37,028 INFO L478 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 13 treesize of output 12 [2018-11-28 13:04:37,028 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-11-28 13:04:37,030 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-11-28 13:04:37,035 INFO L267 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. [2018-11-28 13:04:37,035 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:23, output treesize:19 [2018-11-28 13:04:37,146 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2018-11-28 13:04:37,163 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 13 [2018-11-28 13:04:37,164 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2018-11-28 13:04:37,167 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2018-11-28 13:04:37,174 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2018-11-28 13:04:37,174 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:36, output treesize:39 [2018-11-28 13:04:37,210 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 13:04:37,227 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 13:04:37,227 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2018-11-28 13:04:37,228 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-11-28 13:04:37,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-11-28 13:04:37,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2018-11-28 13:04:37,228 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 20 states. [2018-11-28 13:04:37,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:04:37,622 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2018-11-28 13:04:37,623 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-11-28 13:04:37,623 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 20 [2018-11-28 13:04:37,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:04:37,623 INFO L225 Difference]: With dead ends: 22 [2018-11-28 13:04:37,623 INFO L226 Difference]: Without dead ends: 0 [2018-11-28 13:04:37,623 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=149, Invalid=781, Unknown=0, NotChecked=0, Total=930 [2018-11-28 13:04:37,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-11-28 13:04:37,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-11-28 13:04:37,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-11-28 13:04:37,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-11-28 13:04:37,624 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 20 [2018-11-28 13:04:37,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:04:37,624 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-28 13:04:37,624 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-11-28 13:04:37,624 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-11-28 13:04:37,624 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-11-28 13:04:37,627 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 01:04:37 BoogieIcfgContainer [2018-11-28 13:04:37,627 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-28 13:04:37,627 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-28 13:04:37,628 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-28 13:04:37,628 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-28 13:04:37,628 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 01:04:35" (3/4) ... [2018-11-28 13:04:37,630 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-11-28 13:04:37,636 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-11-28 13:04:37,636 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __bswap_32 [2018-11-28 13:04:37,637 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __bswap_64 [2018-11-28 13:04:37,637 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-11-28 13:04:37,637 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure strlen_rec [2018-11-28 13:04:37,640 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2018-11-28 13:04:37,640 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2018-11-28 13:04:37,640 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2018-11-28 13:04:37,672 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_65db4966-362b-4d9c-a00a-989961cf3c83/bin-2019/uautomizer/witness.graphml [2018-11-28 13:04:37,672 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-28 13:04:37,673 INFO L168 Benchmark]: Toolchain (without parser) took 3116.50 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 125.8 MB). Free memory was 950.6 MB in the beginning and 919.0 MB in the end (delta: 31.6 MB). Peak memory consumption was 157.5 MB. Max. memory is 11.5 GB. [2018-11-28 13:04:37,674 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 1.0 GB. Free memory is still 979.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-28 13:04:37,674 INFO L168 Benchmark]: CACSL2BoogieTranslator took 315.55 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 125.8 MB). Free memory was 950.6 MB in the beginning and 1.1 GB in the end (delta: -164.6 MB). Peak memory consumption was 24.7 MB. Max. memory is 11.5 GB. [2018-11-28 13:04:37,674 INFO L168 Benchmark]: Boogie Preprocessor took 33.28 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2018-11-28 13:04:37,675 INFO L168 Benchmark]: RCFGBuilder took 301.17 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 38.5 MB). Peak memory consumption was 38.5 MB. Max. memory is 11.5 GB. [2018-11-28 13:04:37,675 INFO L168 Benchmark]: TraceAbstraction took 2418.27 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 922.4 MB in the end (delta: 148.9 MB). Peak memory consumption was 148.9 MB. Max. memory is 11.5 GB. [2018-11-28 13:04:37,675 INFO L168 Benchmark]: Witness Printer took 44.89 ms. Allocated memory is still 1.2 GB. Free memory was 922.4 MB in the beginning and 919.0 MB in the end (delta: 3.4 MB). Peak memory consumption was 3.4 MB. Max. memory is 11.5 GB. [2018-11-28 13:04:37,679 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 1.0 GB. Free memory is still 979.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 315.55 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 125.8 MB). Free memory was 950.6 MB in the beginning and 1.1 GB in the end (delta: -164.6 MB). Peak memory consumption was 24.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 33.28 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 301.17 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 38.5 MB). Peak memory consumption was 38.5 MB. Max. memory is 11.5 GB. * TraceAbstraction took 2418.27 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 922.4 MB in the end (delta: 148.9 MB). Peak memory consumption was 148.9 MB. Max. memory is 11.5 GB. * Witness Printer took 44.89 ms. Allocated memory is still 1.2 GB. Free memory was 922.4 MB in the beginning and 919.0 MB in the end (delta: 3.4 MB). Peak memory consumption was 3.4 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 546]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 552]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 552]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 541]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 541]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - AllSpecificationsHoldResult: All specifications hold 5 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 33 locations, 5 error locations. SAFE Result, 2.3s OverallTime, 8 OverallIterations, 3 TraceHistogramMax, 0.9s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 151 SDtfs, 126 SDslu, 495 SDs, 0 SdLazy, 468 SolverSat, 64 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 104 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 1.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=43occurred in iteration=6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 8 MinimizatonAttempts, 7 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 1.1s InterpolantComputationTime, 147 NumberOfCodeBlocks, 147 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 137 ConstructedInterpolants, 10 QuantifiedInterpolants, 15635 SizeOfPredicates, 16 NumberOfNonLiveVariables, 169 ConjunctsInSsa, 53 ConjunctsInUnsatCore, 10 InterpolantComputations, 6 PerfectInterpolantSequences, 4/22 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...