./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-invgen/id_build.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_64621b79-454f-44c7-9cd6-9e2f0ebe846e/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_64621b79-454f-44c7-9cd6-9e2f0ebe846e/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_64621b79-454f-44c7-9cd6-9e2f0ebe846e/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_64621b79-454f-44c7-9cd6-9e2f0ebe846e/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-invgen/id_build.i -s /tmp/vcloud-vcloud-master/worker/run_dir_64621b79-454f-44c7-9cd6-9e2f0ebe846e/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_64621b79-454f-44c7-9cd6-9e2f0ebe846e/bin/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 8e693e301fe03afa61a3f7e2110361a5e60df7f9 ..................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-22 13:08:13,230 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-22 13:08:13,233 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-22 13:08:13,297 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-22 13:08:13,298 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-22 13:08:13,303 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-22 13:08:13,308 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-22 13:08:13,312 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-22 13:08:13,314 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-22 13:08:13,315 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-22 13:08:13,316 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-22 13:08:13,317 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-22 13:08:13,318 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-22 13:08:13,327 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-22 13:08:13,329 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-22 13:08:13,331 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-22 13:08:13,333 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-22 13:08:13,335 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-22 13:08:13,342 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-22 13:08:13,348 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-22 13:08:13,351 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-22 13:08:13,352 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-22 13:08:13,355 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-22 13:08:13,356 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-22 13:08:13,362 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-22 13:08:13,362 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-22 13:08:13,363 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-22 13:08:13,365 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-22 13:08:13,366 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-22 13:08:13,367 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-22 13:08:13,367 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-22 13:08:13,368 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-22 13:08:13,370 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-22 13:08:13,371 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-22 13:08:13,372 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-22 13:08:13,373 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-22 13:08:13,373 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-22 13:08:13,374 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-22 13:08:13,374 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-22 13:08:13,375 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-22 13:08:13,375 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-22 13:08:13,376 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_64621b79-454f-44c7-9cd6-9e2f0ebe846e/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-11-22 13:08:13,422 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-22 13:08:13,423 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-22 13:08:13,424 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-22 13:08:13,424 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-22 13:08:13,425 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-22 13:08:13,425 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-22 13:08:13,425 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-22 13:08:13,425 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-22 13:08:13,426 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-22 13:08:13,426 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-22 13:08:13,427 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-22 13:08:13,427 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-22 13:08:13,428 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-22 13:08:13,428 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-22 13:08:13,428 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-22 13:08:13,429 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-22 13:08:13,429 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-22 13:08:13,429 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-22 13:08:13,429 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-22 13:08:13,430 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-22 13:08:13,430 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-22 13:08:13,430 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-22 13:08:13,430 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-22 13:08:13,431 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-22 13:08:13,431 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-22 13:08:13,431 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-22 13:08:13,431 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-22 13:08:13,431 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-22 13:08:13,432 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-22 13:08:13,432 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-22 13:08:13,432 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-22 13:08:13,432 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-22 13:08:13,433 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-22 13:08:13,433 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-22 13:08:13,433 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-22 13:08:13,434 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-22 13:08:13,434 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-22 13:08:13,434 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-22 13:08:13,434 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-22 13:08:13,434 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-22 13:08:13,435 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_64621b79-454f-44c7-9cd6-9e2f0ebe846e/bin/utaipan/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_64621b79-454f-44c7-9cd6-9e2f0ebe846e/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8e693e301fe03afa61a3f7e2110361a5e60df7f9 [2020-11-22 13:08:13,672 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-22 13:08:13,705 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-22 13:08:13,710 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-22 13:08:13,711 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-22 13:08:13,712 INFO L275 PluginConnector]: CDTParser initialized [2020-11-22 13:08:13,713 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_64621b79-454f-44c7-9cd6-9e2f0ebe846e/bin/utaipan/../../sv-benchmarks/c/loop-invgen/id_build.i [2020-11-22 13:08:13,782 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_64621b79-454f-44c7-9cd6-9e2f0ebe846e/bin/utaipan/data/1be15c6b8/03b691905fbe40d4957c103e2bf27499/FLAG24080f63a [2020-11-22 13:08:14,225 INFO L306 CDTParser]: Found 1 translation units. [2020-11-22 13:08:14,225 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_64621b79-454f-44c7-9cd6-9e2f0ebe846e/sv-benchmarks/c/loop-invgen/id_build.i [2020-11-22 13:08:14,234 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_64621b79-454f-44c7-9cd6-9e2f0ebe846e/bin/utaipan/data/1be15c6b8/03b691905fbe40d4957c103e2bf27499/FLAG24080f63a [2020-11-22 13:08:14,623 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_64621b79-454f-44c7-9cd6-9e2f0ebe846e/bin/utaipan/data/1be15c6b8/03b691905fbe40d4957c103e2bf27499 [2020-11-22 13:08:14,625 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-22 13:08:14,627 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-22 13:08:14,632 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-22 13:08:14,633 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-22 13:08:14,636 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-22 13:08:14,637 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:08:14" (1/1) ... [2020-11-22 13:08:14,639 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@10bf5f73 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:08:14, skipping insertion in model container [2020-11-22 13:08:14,639 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:08:14" (1/1) ... [2020-11-22 13:08:14,646 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-22 13:08:14,661 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-22 13:08:14,859 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-22 13:08:14,869 INFO L203 MainTranslator]: Completed pre-run [2020-11-22 13:08:14,884 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-22 13:08:14,898 INFO L208 MainTranslator]: Completed translation [2020-11-22 13:08:14,899 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:08:14 WrapperNode [2020-11-22 13:08:14,899 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-22 13:08:14,900 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-22 13:08:14,901 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-22 13:08:14,901 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-22 13:08:14,909 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:08:14" (1/1) ... [2020-11-22 13:08:14,915 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:08:14" (1/1) ... [2020-11-22 13:08:14,933 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-22 13:08:14,933 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-22 13:08:14,934 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-22 13:08:14,934 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-22 13:08:14,942 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:08:14" (1/1) ... [2020-11-22 13:08:14,942 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:08:14" (1/1) ... [2020-11-22 13:08:14,944 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:08:14" (1/1) ... [2020-11-22 13:08:14,944 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:08:14" (1/1) ... [2020-11-22 13:08:14,948 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:08:14" (1/1) ... [2020-11-22 13:08:14,952 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:08:14" (1/1) ... [2020-11-22 13:08:14,953 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:08:14" (1/1) ... [2020-11-22 13:08:14,955 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-22 13:08:14,956 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-22 13:08:14,956 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-22 13:08:14,956 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-22 13:08:14,957 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:08:14" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_64621b79-454f-44c7-9cd6-9e2f0ebe846e/bin/utaipan/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 [2020-11-22 13:08:15,033 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-22 13:08:15,034 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-22 13:08:15,034 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-22 13:08:15,034 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-22 13:08:15,422 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-22 13:08:15,423 INFO L298 CfgBuilder]: Removed 14 assume(true) statements. [2020-11-22 13:08:15,424 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:08:15 BoogieIcfgContainer [2020-11-22 13:08:15,425 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-22 13:08:15,426 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-22 13:08:15,426 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-22 13:08:15,429 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-22 13:08:15,430 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 01:08:14" (1/3) ... [2020-11-22 13:08:15,431 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74c0a8e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:08:15, skipping insertion in model container [2020-11-22 13:08:15,431 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:08:14" (2/3) ... [2020-11-22 13:08:15,431 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74c0a8e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:08:15, skipping insertion in model container [2020-11-22 13:08:15,431 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:08:15" (3/3) ... [2020-11-22 13:08:15,432 INFO L111 eAbstractionObserver]: Analyzing ICFG id_build.i [2020-11-22 13:08:15,443 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-22 13:08:15,447 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-11-22 13:08:15,458 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-11-22 13:08:15,493 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-22 13:08:15,494 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-22 13:08:15,494 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-22 13:08:15,494 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-22 13:08:15,494 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-22 13:08:15,494 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-22 13:08:15,494 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-22 13:08:15,495 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-22 13:08:15,507 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states. [2020-11-22 13:08:15,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-11-22 13:08:15,512 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:08:15,512 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-11-22 13:08:15,513 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 13:08:15,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:08:15,519 INFO L82 PathProgramCache]: Analyzing trace with hash -1422210659, now seen corresponding path program 1 times [2020-11-22 13:08:15,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:08:15,528 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875969390] [2020-11-22 13:08:15,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:08:15,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:08:15,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:08:15,722 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875969390] [2020-11-22 13:08:15,723 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:08:15,723 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-22 13:08:15,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896589] [2020-11-22 13:08:15,729 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-22 13:08:15,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:08:15,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-22 13:08:15,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-22 13:08:15,749 INFO L87 Difference]: Start difference. First operand 16 states. Second operand 4 states. [2020-11-22 13:08:15,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:08:15,835 INFO L93 Difference]: Finished difference Result 29 states and 39 transitions. [2020-11-22 13:08:15,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-22 13:08:15,837 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-11-22 13:08:15,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:08:15,853 INFO L225 Difference]: With dead ends: 29 [2020-11-22 13:08:15,859 INFO L226 Difference]: Without dead ends: 12 [2020-11-22 13:08:15,862 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-22 13:08:15,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-11-22 13:08:15,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 10. [2020-11-22 13:08:15,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-11-22 13:08:15,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2020-11-22 13:08:15,895 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 6 [2020-11-22 13:08:15,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:08:15,896 INFO L481 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2020-11-22 13:08:15,896 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-22 13:08:15,896 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2020-11-22 13:08:15,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-11-22 13:08:15,897 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:08:15,897 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:08:15,897 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-22 13:08:15,897 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 13:08:15,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:08:15,901 INFO L82 PathProgramCache]: Analyzing trace with hash -979626983, now seen corresponding path program 1 times [2020-11-22 13:08:15,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:08:15,902 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958438725] [2020-11-22 13:08:15,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:08:15,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:08:16,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:08:16,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958438725] [2020-11-22 13:08:16,070 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:08:16,070 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-22 13:08:16,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444609872] [2020-11-22 13:08:16,072 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-22 13:08:16,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:08:16,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-22 13:08:16,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-22 13:08:16,073 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand 4 states. [2020-11-22 13:08:16,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:08:16,117 INFO L93 Difference]: Finished difference Result 12 states and 14 transitions. [2020-11-22 13:08:16,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-22 13:08:16,118 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2020-11-22 13:08:16,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:08:16,118 INFO L225 Difference]: With dead ends: 12 [2020-11-22 13:08:16,118 INFO L226 Difference]: Without dead ends: 0 [2020-11-22 13:08:16,119 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-22 13:08:16,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-22 13:08:16,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-22 13:08:16,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-22 13:08:16,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-22 13:08:16,120 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 8 [2020-11-22 13:08:16,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:08:16,120 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-22 13:08:16,121 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-22 13:08:16,121 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-22 13:08:16,121 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-22 13:08:16,121 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-22 13:08:16,123 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-11-22 13:08:16,177 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION(line 12) no Hoare annotation was computed. [2020-11-22 13:08:16,177 INFO L270 CegarLoopResult]: At program point L27-3(lines 27 32) the Hoare annotation is: (< 0 (+ ULTIMATE.start_main_~i~0 1)) [2020-11-22 13:08:16,177 INFO L274 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-11-22 13:08:16,178 INFO L270 CegarLoopResult]: At program point L28-2(lines 28 31) the Hoare annotation is: (let ((.cse0 (+ ULTIMATE.start_main_~i~0 1))) (and (< 0 .cse0) (<= .cse0 ULTIMATE.start_main_~nlen~0))) [2020-11-22 13:08:16,178 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 12) no Hoare annotation was computed. [2020-11-22 13:08:16,178 INFO L274 CegarLoopResult]: For program point L12(line 12) no Hoare annotation was computed. [2020-11-22 13:08:16,178 INFO L274 CegarLoopResult]: For program point L12-2(line 12) no Hoare annotation was computed. [2020-11-22 13:08:16,178 INFO L274 CegarLoopResult]: For program point L12-3(line 12) no Hoare annotation was computed. [2020-11-22 13:08:16,178 INFO L274 CegarLoopResult]: For program point L12-4(line 12) no Hoare annotation was computed. [2020-11-22 13:08:16,178 INFO L274 CegarLoopResult]: For program point L12-6(line 12) no Hoare annotation was computed. [2020-11-22 13:08:16,178 INFO L274 CegarLoopResult]: For program point L12-7(line 12) no Hoare annotation was computed. [2020-11-22 13:08:16,179 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-11-22 13:08:16,179 INFO L274 CegarLoopResult]: For program point L18(lines 18 20) no Hoare annotation was computed. [2020-11-22 13:08:16,179 INFO L270 CegarLoopResult]: At program point L18-2(lines 17 22) the Hoare annotation is: (let ((.cse0 (+ ULTIMATE.start_main_~i~0 1))) (and (not (= 0 ULTIMATE.start___VERIFIER_assert_~cond)) (< 0 .cse0) (<= .cse0 ULTIMATE.start_main_~nlen~0))) [2020-11-22 13:08:16,179 INFO L274 CegarLoopResult]: For program point L18-3(lines 18 20) no Hoare annotation was computed. [2020-11-22 13:08:16,179 INFO L270 CegarLoopResult]: At program point L18-5(lines 1 34) the Hoare annotation is: (let ((.cse0 (+ ULTIMATE.start_main_~i~0 1))) (and (not (= 0 ULTIMATE.start___VERIFIER_assert_~cond)) (< 0 .cse0) (<= .cse0 ULTIMATE.start_main_~nlen~0))) [2020-11-22 13:08:16,195 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.11 01:08:16 BoogieIcfgContainer [2020-11-22 13:08:16,195 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-22 13:08:16,196 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-22 13:08:16,196 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-22 13:08:16,196 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-22 13:08:16,198 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:08:15" (3/4) ... [2020-11-22 13:08:16,201 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-11-22 13:08:16,212 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 14 nodes and edges [2020-11-22 13:08:16,212 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2020-11-22 13:08:16,213 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2020-11-22 13:08:16,213 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-22 13:08:16,265 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_64621b79-454f-44c7-9cd6-9e2f0ebe846e/bin/utaipan/witness.graphml [2020-11-22 13:08:16,266 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-22 13:08:16,268 INFO L168 Benchmark]: Toolchain (without parser) took 1640.23 ms. Allocated memory was 98.6 MB in the beginning and 119.5 MB in the end (delta: 21.0 MB). Free memory was 72.5 MB in the beginning and 84.9 MB in the end (delta: -12.5 MB). Peak memory consumption was 6.9 MB. Max. memory is 16.1 GB. [2020-11-22 13:08:16,268 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 98.6 MB. Free memory is still 55.3 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-22 13:08:16,269 INFO L168 Benchmark]: CACSL2BoogieTranslator took 267.16 ms. Allocated memory was 98.6 MB in the beginning and 119.5 MB in the end (delta: 21.0 MB). Free memory was 72.2 MB in the beginning and 97.4 MB in the end (delta: -25.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-11-22 13:08:16,270 INFO L168 Benchmark]: Boogie Procedure Inliner took 32.45 ms. Allocated memory is still 119.5 MB. Free memory was 97.4 MB in the beginning and 96.1 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-22 13:08:16,270 INFO L168 Benchmark]: Boogie Preprocessor took 21.41 ms. Allocated memory is still 119.5 MB. Free memory was 96.1 MB in the beginning and 94.8 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-22 13:08:16,271 INFO L168 Benchmark]: RCFGBuilder took 469.10 ms. Allocated memory is still 119.5 MB. Free memory was 94.8 MB in the beginning and 79.5 MB in the end (delta: 15.3 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. [2020-11-22 13:08:16,272 INFO L168 Benchmark]: TraceAbstraction took 768.85 ms. Allocated memory is still 119.5 MB. Free memory was 79.0 MB in the beginning and 87.7 MB in the end (delta: -8.7 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-22 13:08:16,272 INFO L168 Benchmark]: Witness Printer took 70.33 ms. Allocated memory is still 119.5 MB. Free memory was 87.7 MB in the beginning and 84.9 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-22 13:08:16,275 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 98.6 MB. Free memory is still 55.3 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 267.16 ms. Allocated memory was 98.6 MB in the beginning and 119.5 MB in the end (delta: 21.0 MB). Free memory was 72.2 MB in the beginning and 97.4 MB in the end (delta: -25.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 32.45 ms. Allocated memory is still 119.5 MB. Free memory was 97.4 MB in the beginning and 96.1 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 21.41 ms. Allocated memory is still 119.5 MB. Free memory was 96.1 MB in the beginning and 94.8 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 469.10 ms. Allocated memory is still 119.5 MB. Free memory was 94.8 MB in the beginning and 79.5 MB in the end (delta: 15.3 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. * TraceAbstraction took 768.85 ms. Allocated memory is still 119.5 MB. Free memory was 79.0 MB in the beginning and 87.7 MB in the end (delta: -8.7 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 70.33 ms. Allocated memory is still 119.5 MB. Free memory was 87.7 MB in the beginning and 84.9 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: 12]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - PositiveResult [Line: 12]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold - InvariantResult [Line: 28]: Loop Invariant Derived loop invariant: 0 < i + 1 && i + 1 <= nlen - InvariantResult [Line: 17]: Loop Invariant Derived loop invariant: (!(0 == cond) && 0 < i + 1) && i + 1 <= nlen - InvariantResult [Line: 1]: Loop Invariant Derived loop invariant: (!(0 == cond) && 0 < i + 1) && i + 1 <= nlen - InvariantResult [Line: 27]: Loop Invariant Derived loop invariant: 0 < i + 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 16 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 0.6s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 13 SDtfs, 16 SDslu, 6 SDs, 0 SdLazy, 26 SolverSat, 7 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=16occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 2 MinimizatonAttempts, 2 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 4 LocationsWithAnnotation, 4 PreInvPairs, 10 NumberOfFragments, 46 HoareAnnotationTreeSize, 4 FomulaSimplifications, 49 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 4 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 14 NumberOfCodeBlocks, 14 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 12 ConstructedInterpolants, 0 QuantifiedInterpolants, 242 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 PerfectInterpolantSequences, 0/0 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...