./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/psyco/psyco_abp_1-3.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 678e0110 Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_98b986d0-27d1-41ce-9b54-909f933f13e8/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_98b986d0-27d1-41ce-9b54-909f933f13e8/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_98b986d0-27d1-41ce-9b54-909f933f13e8/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_98b986d0-27d1-41ce-9b54-909f933f13e8/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/psyco/psyco_abp_1-3.c -s /tmp/vcloud-vcloud-master/worker/run_dir_98b986d0-27d1-41ce-9b54-909f933f13e8/bin/uautomizer/config/svcomp-Overflow-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_98b986d0-27d1-41ce-9b54-909f933f13e8/bin/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 45f0d0ab6d17adbe7cd7f36bcd9ec097795f4c36 ............................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.24-678e011 [2019-11-20 09:10:09,765 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-20 09:10:09,767 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-20 09:10:09,781 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-20 09:10:09,781 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-20 09:10:09,782 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-20 09:10:09,784 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-20 09:10:09,792 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-20 09:10:09,797 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-20 09:10:09,800 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-20 09:10:09,801 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-20 09:10:09,803 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-20 09:10:09,803 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-20 09:10:09,805 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-20 09:10:09,806 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-20 09:10:09,807 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-20 09:10:09,808 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-20 09:10:09,809 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-20 09:10:09,811 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-20 09:10:09,815 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-20 09:10:09,818 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-20 09:10:09,820 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-20 09:10:09,823 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-20 09:10:09,823 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-20 09:10:09,826 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-20 09:10:09,826 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-20 09:10:09,827 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-20 09:10:09,827 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-20 09:10:09,828 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-20 09:10:09,828 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-20 09:10:09,829 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-20 09:10:09,829 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-20 09:10:09,830 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-20 09:10:09,830 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-20 09:10:09,831 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-20 09:10:09,831 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-20 09:10:09,832 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-20 09:10:09,832 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-20 09:10:09,832 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-20 09:10:09,833 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-20 09:10:09,833 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-20 09:10:09,834 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_98b986d0-27d1-41ce-9b54-909f933f13e8/bin/uautomizer/config/svcomp-Overflow-32bit-Automizer_Default.epf [2019-11-20 09:10:09,846 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-20 09:10:09,846 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-20 09:10:09,847 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-20 09:10:09,847 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-20 09:10:09,847 INFO L138 SettingsManager]: * Use SBE=true [2019-11-20 09:10:09,847 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-20 09:10:09,848 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-20 09:10:09,848 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-11-20 09:10:09,848 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-20 09:10:09,848 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-20 09:10:09,848 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-20 09:10:09,848 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-20 09:10:09,849 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-20 09:10:09,849 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-20 09:10:09,849 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2019-11-20 09:10:09,849 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-20 09:10:09,849 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-20 09:10:09,849 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-20 09:10:09,850 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-20 09:10:09,850 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-20 09:10:09,850 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-20 09:10:09,850 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-20 09:10:09,850 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-20 09:10:09,851 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-20 09:10:09,851 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-20 09:10:09,851 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-20 09:10:09,851 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-20 09:10:09,851 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-20 09:10:09,852 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-20 09:10:09,852 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-20 09:10:09,852 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_98b986d0-27d1-41ce-9b54-909f933f13e8/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) 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 -> 45f0d0ab6d17adbe7cd7f36bcd9ec097795f4c36 [2019-11-20 09:10:10,022 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-20 09:10:10,038 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-20 09:10:10,041 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-20 09:10:10,043 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-20 09:10:10,044 INFO L275 PluginConnector]: CDTParser initialized [2019-11-20 09:10:10,045 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_98b986d0-27d1-41ce-9b54-909f933f13e8/bin/uautomizer/../../sv-benchmarks/c/psyco/psyco_abp_1-3.c [2019-11-20 09:10:10,099 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_98b986d0-27d1-41ce-9b54-909f933f13e8/bin/uautomizer/data/692ba87e1/c52ae891e6d04d7c9b822a1fc2b645a7/FLAGbfeec25f4 [2019-11-20 09:10:10,550 INFO L306 CDTParser]: Found 1 translation units. [2019-11-20 09:10:10,552 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_98b986d0-27d1-41ce-9b54-909f933f13e8/sv-benchmarks/c/psyco/psyco_abp_1-3.c [2019-11-20 09:10:10,563 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_98b986d0-27d1-41ce-9b54-909f933f13e8/bin/uautomizer/data/692ba87e1/c52ae891e6d04d7c9b822a1fc2b645a7/FLAGbfeec25f4 [2019-11-20 09:10:10,577 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_98b986d0-27d1-41ce-9b54-909f933f13e8/bin/uautomizer/data/692ba87e1/c52ae891e6d04d7c9b822a1fc2b645a7 [2019-11-20 09:10:10,581 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-20 09:10:10,582 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-20 09:10:10,585 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-20 09:10:10,585 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-20 09:10:10,589 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-20 09:10:10,590 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 09:10:10" (1/1) ... [2019-11-20 09:10:10,593 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2d7d0414 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:10:10, skipping insertion in model container [2019-11-20 09:10:10,593 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 09:10:10" (1/1) ... [2019-11-20 09:10:10,600 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-20 09:10:10,651 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-20 09:10:11,023 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-20 09:10:11,028 INFO L188 MainTranslator]: Completed pre-run [2019-11-20 09:10:11,151 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-20 09:10:11,170 INFO L192 MainTranslator]: Completed translation [2019-11-20 09:10:11,173 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:10:11 WrapperNode [2019-11-20 09:10:11,174 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-20 09:10:11,174 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-20 09:10:11,175 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-20 09:10:11,175 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-20 09:10:11,184 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:10:11" (1/1) ... [2019-11-20 09:10:11,205 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:10:11" (1/1) ... [2019-11-20 09:10:11,256 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-20 09:10:11,256 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-20 09:10:11,257 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-20 09:10:11,257 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-20 09:10:11,266 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:10:11" (1/1) ... [2019-11-20 09:10:11,266 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:10:11" (1/1) ... [2019-11-20 09:10:11,269 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:10:11" (1/1) ... [2019-11-20 09:10:11,269 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:10:11" (1/1) ... [2019-11-20 09:10:11,286 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:10:11" (1/1) ... [2019-11-20 09:10:11,294 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:10:11" (1/1) ... [2019-11-20 09:10:11,300 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:10:11" (1/1) ... [2019-11-20 09:10:11,307 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-20 09:10:11,308 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-20 09:10:11,308 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-20 09:10:11,308 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-20 09:10:11,309 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:10:11" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_98b986d0-27d1-41ce-9b54-909f933f13e8/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-20 09:10:11,371 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-20 09:10:11,371 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-20 09:10:12,221 INFO L280 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-20 09:10:12,221 INFO L285 CfgBuilder]: Removed 6 assume(true) statements. [2019-11-20 09:10:12,222 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 09:10:12 BoogieIcfgContainer [2019-11-20 09:10:12,222 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-20 09:10:12,223 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-20 09:10:12,223 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-20 09:10:12,225 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-20 09:10:12,226 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 09:10:10" (1/3) ... [2019-11-20 09:10:12,226 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2659526d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 09:10:12, skipping insertion in model container [2019-11-20 09:10:12,226 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:10:11" (2/3) ... [2019-11-20 09:10:12,227 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2659526d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 09:10:12, skipping insertion in model container [2019-11-20 09:10:12,227 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 09:10:12" (3/3) ... [2019-11-20 09:10:12,228 INFO L109 eAbstractionObserver]: Analyzing ICFG psyco_abp_1-3.c [2019-11-20 09:10:12,241 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-20 09:10:12,251 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 0 error locations. [2019-11-20 09:10:12,263 INFO L249 AbstractCegarLoop]: Starting to check reachability of 0 error locations. [2019-11-20 09:10:12,291 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-20 09:10:12,291 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-20 09:10:12,292 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-20 09:10:12,292 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-20 09:10:12,292 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-20 09:10:12,293 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-20 09:10:12,293 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-20 09:10:12,293 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-20 09:10:12,317 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states. [2019-11-20 09:10:12,328 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-11-20 09:10:12,336 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 108 states. [2019-11-20 09:10:12,387 INFO L444 ceAbstractionStarter]: For program point L498(lines 498 500) no Hoare annotation was computed. [2019-11-20 09:10:12,387 INFO L444 ceAbstractionStarter]: For program point L366(lines 366 368) no Hoare annotation was computed. [2019-11-20 09:10:12,387 INFO L444 ceAbstractionStarter]: For program point L466(lines 466 468) no Hoare annotation was computed. [2019-11-20 09:10:12,387 INFO L444 ceAbstractionStarter]: For program point L39(lines 39 58) no Hoare annotation was computed. [2019-11-20 09:10:12,387 INFO L444 ceAbstractionStarter]: For program point L40(lines 40 55) no Hoare annotation was computed. [2019-11-20 09:10:12,388 INFO L444 ceAbstractionStarter]: For program point L140(lines 140 155) no Hoare annotation was computed. [2019-11-20 09:10:12,388 INFO L444 ceAbstractionStarter]: For program point L240(lines 240 255) no Hoare annotation was computed. [2019-11-20 09:10:12,388 INFO L444 ceAbstractionStarter]: For program point L108(lines 108 123) no Hoare annotation was computed. [2019-11-20 09:10:12,388 INFO L444 ceAbstractionStarter]: For program point L42(lines 42 53) no Hoare annotation was computed. [2019-11-20 09:10:12,388 INFO L444 ceAbstractionStarter]: For program point L340(lines 340 355) no Hoare annotation was computed. [2019-11-20 09:10:12,388 INFO L444 ceAbstractionStarter]: For program point L208(lines 208 223) no Hoare annotation was computed. [2019-11-20 09:10:12,388 INFO L444 ceAbstractionStarter]: For program point L142(lines 142 153) no Hoare annotation was computed. [2019-11-20 09:10:12,389 INFO L444 ceAbstractionStarter]: For program point L76(lines 76 91) no Hoare annotation was computed. [2019-11-20 09:10:12,389 INFO L444 ceAbstractionStarter]: For program point L440(lines 440 455) no Hoare annotation was computed. [2019-11-20 09:10:12,389 INFO L444 ceAbstractionStarter]: For program point L308(lines 308 323) no Hoare annotation was computed. [2019-11-20 09:10:12,389 INFO L444 ceAbstractionStarter]: For program point L242(lines 242 253) no Hoare annotation was computed. [2019-11-20 09:10:12,389 INFO L444 ceAbstractionStarter]: For program point L176(lines 176 191) no Hoare annotation was computed. [2019-11-20 09:10:12,389 INFO L444 ceAbstractionStarter]: For program point L110(lines 110 121) no Hoare annotation was computed. [2019-11-20 09:10:12,389 INFO L444 ceAbstractionStarter]: For program point L540(lines 540 555) no Hoare annotation was computed. [2019-11-20 09:10:12,389 INFO L444 ceAbstractionStarter]: For program point L408(lines 408 423) no Hoare annotation was computed. [2019-11-20 09:10:12,390 INFO L444 ceAbstractionStarter]: For program point L342(lines 342 353) no Hoare annotation was computed. [2019-11-20 09:10:12,390 INFO L444 ceAbstractionStarter]: For program point L276(lines 276 291) no Hoare annotation was computed. [2019-11-20 09:10:12,390 INFO L444 ceAbstractionStarter]: For program point L210(lines 210 221) no Hoare annotation was computed. [2019-11-20 09:10:12,390 INFO L444 ceAbstractionStarter]: For program point L78(lines 78 89) no Hoare annotation was computed. [2019-11-20 09:10:12,390 INFO L444 ceAbstractionStarter]: For program point L508(lines 508 523) no Hoare annotation was computed. [2019-11-20 09:10:12,390 INFO L444 ceAbstractionStarter]: For program point L442(lines 442 453) no Hoare annotation was computed. [2019-11-20 09:10:12,390 INFO L444 ceAbstractionStarter]: For program point L376(lines 376 391) no Hoare annotation was computed. [2019-11-20 09:10:12,391 INFO L444 ceAbstractionStarter]: For program point L310(lines 310 321) no Hoare annotation was computed. [2019-11-20 09:10:12,391 INFO L444 ceAbstractionStarter]: For program point L178(lines 178 189) no Hoare annotation was computed. [2019-11-20 09:10:12,391 INFO L444 ceAbstractionStarter]: For program point L46(lines 46 48) no Hoare annotation was computed. [2019-11-20 09:10:12,391 INFO L444 ceAbstractionStarter]: For program point L542(lines 542 553) no Hoare annotation was computed. [2019-11-20 09:10:12,391 INFO L444 ceAbstractionStarter]: For program point L476(lines 476 491) no Hoare annotation was computed. [2019-11-20 09:10:12,391 INFO L444 ceAbstractionStarter]: For program point L410(lines 410 421) no Hoare annotation was computed. [2019-11-20 09:10:12,391 INFO L444 ceAbstractionStarter]: For program point L278(lines 278 289) no Hoare annotation was computed. [2019-11-20 09:10:12,392 INFO L444 ceAbstractionStarter]: For program point L146(lines 146 148) no Hoare annotation was computed. [2019-11-20 09:10:12,392 INFO L447 ceAbstractionStarter]: At program point L14(lines 14 566) the Hoare annotation is: true [2019-11-20 09:10:12,392 INFO L444 ceAbstractionStarter]: For program point L510(lines 510 521) no Hoare annotation was computed. [2019-11-20 09:10:12,392 INFO L444 ceAbstractionStarter]: For program point L378(lines 378 389) no Hoare annotation was computed. [2019-11-20 09:10:12,392 INFO L444 ceAbstractionStarter]: For program point L246(lines 246 248) no Hoare annotation was computed. [2019-11-20 09:10:12,392 INFO L444 ceAbstractionStarter]: For program point L114(lines 114 116) no Hoare annotation was computed. [2019-11-20 09:10:12,392 INFO L444 ceAbstractionStarter]: For program point L478(lines 478 489) no Hoare annotation was computed. [2019-11-20 09:10:12,393 INFO L444 ceAbstractionStarter]: For program point L346(lines 346 348) no Hoare annotation was computed. [2019-11-20 09:10:12,393 INFO L444 ceAbstractionStarter]: For program point L214(lines 214 216) no Hoare annotation was computed. [2019-11-20 09:10:12,393 INFO L444 ceAbstractionStarter]: For program point L82(lines 82 84) no Hoare annotation was computed. [2019-11-20 09:10:12,393 INFO L444 ceAbstractionStarter]: For program point L446(lines 446 448) no Hoare annotation was computed. [2019-11-20 09:10:12,393 INFO L444 ceAbstractionStarter]: For program point L314(lines 314 316) no Hoare annotation was computed. [2019-11-20 09:10:12,393 INFO L444 ceAbstractionStarter]: For program point L182(lines 182 184) no Hoare annotation was computed. [2019-11-20 09:10:12,393 INFO L444 ceAbstractionStarter]: For program point L546(lines 546 548) no Hoare annotation was computed. [2019-11-20 09:10:12,394 INFO L444 ceAbstractionStarter]: For program point L414(lines 414 416) no Hoare annotation was computed. [2019-11-20 09:10:12,394 INFO L444 ceAbstractionStarter]: For program point L282(lines 282 284) no Hoare annotation was computed. [2019-11-20 09:10:12,394 INFO L447 ceAbstractionStarter]: At program point L547(lines 14 566) the Hoare annotation is: true [2019-11-20 09:10:12,394 INFO L444 ceAbstractionStarter]: For program point L514(lines 514 516) no Hoare annotation was computed. [2019-11-20 09:10:12,394 INFO L444 ceAbstractionStarter]: For program point L382(lines 382 384) no Hoare annotation was computed. [2019-11-20 09:10:12,394 INFO L444 ceAbstractionStarter]: For program point L482(lines 482 484) no Hoare annotation was computed. [2019-11-20 09:10:12,394 INFO L444 ceAbstractionStarter]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2019-11-20 09:10:12,395 INFO L447 ceAbstractionStarter]: At program point L24-2(lines 24 561) the Hoare annotation is: true [2019-11-20 09:10:12,395 INFO L444 ceAbstractionStarter]: For program point L24-3(lines 24 561) no Hoare annotation was computed. [2019-11-20 09:10:12,395 INFO L444 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-11-20 09:10:12,395 INFO L444 ceAbstractionStarter]: For program point L124(lines 124 139) no Hoare annotation was computed. [2019-11-20 09:10:12,395 INFO L444 ceAbstractionStarter]: For program point L224(lines 224 239) no Hoare annotation was computed. [2019-11-20 09:10:12,395 INFO L444 ceAbstractionStarter]: For program point L92(lines 92 107) no Hoare annotation was computed. [2019-11-20 09:10:12,395 INFO L444 ceAbstractionStarter]: For program point L59(lines 59 158) no Hoare annotation was computed. [2019-11-20 09:10:12,395 INFO L444 ceAbstractionStarter]: For program point L324(lines 324 339) no Hoare annotation was computed. [2019-11-20 09:10:12,396 INFO L444 ceAbstractionStarter]: For program point L192(lines 192 207) no Hoare annotation was computed. [2019-11-20 09:10:12,396 INFO L444 ceAbstractionStarter]: For program point L159(lines 159 258) no Hoare annotation was computed. [2019-11-20 09:10:12,396 INFO L444 ceAbstractionStarter]: For program point L126(lines 126 137) no Hoare annotation was computed. [2019-11-20 09:10:12,396 INFO L444 ceAbstractionStarter]: For program point L60(lines 60 75) no Hoare annotation was computed. [2019-11-20 09:10:12,396 INFO L444 ceAbstractionStarter]: For program point L424(lines 424 439) no Hoare annotation was computed. [2019-11-20 09:10:12,396 INFO L444 ceAbstractionStarter]: For program point L292(lines 292 307) no Hoare annotation was computed. [2019-11-20 09:10:12,396 INFO L444 ceAbstractionStarter]: For program point L259(lines 259 358) no Hoare annotation was computed. [2019-11-20 09:10:12,396 INFO L444 ceAbstractionStarter]: For program point L226(lines 226 237) no Hoare annotation was computed. [2019-11-20 09:10:12,397 INFO L444 ceAbstractionStarter]: For program point L160(lines 160 175) no Hoare annotation was computed. [2019-11-20 09:10:12,397 INFO L444 ceAbstractionStarter]: For program point L94(lines 94 105) no Hoare annotation was computed. [2019-11-20 09:10:12,397 INFO L444 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-11-20 09:10:12,397 INFO L447 ceAbstractionStarter]: At program point L557(lines 24 561) the Hoare annotation is: true [2019-11-20 09:10:12,397 INFO L444 ceAbstractionStarter]: For program point L524(lines 524 539) no Hoare annotation was computed. [2019-11-20 09:10:12,397 INFO L444 ceAbstractionStarter]: For program point L392(lines 392 407) no Hoare annotation was computed. [2019-11-20 09:10:12,397 INFO L444 ceAbstractionStarter]: For program point L359(lines 359 458) no Hoare annotation was computed. [2019-11-20 09:10:12,397 INFO L444 ceAbstractionStarter]: For program point L326(lines 326 337) no Hoare annotation was computed. [2019-11-20 09:10:12,398 INFO L444 ceAbstractionStarter]: For program point L260(lines 260 275) no Hoare annotation was computed. [2019-11-20 09:10:12,398 INFO L444 ceAbstractionStarter]: For program point L194(lines 194 205) no Hoare annotation was computed. [2019-11-20 09:10:12,398 INFO L444 ceAbstractionStarter]: For program point L62(lines 62 73) no Hoare annotation was computed. [2019-11-20 09:10:12,398 INFO L444 ceAbstractionStarter]: For program point L492(lines 492 507) no Hoare annotation was computed. [2019-11-20 09:10:12,398 INFO L444 ceAbstractionStarter]: For program point L459(lines 459 558) no Hoare annotation was computed. [2019-11-20 09:10:12,398 INFO L444 ceAbstractionStarter]: For program point L426(lines 426 437) no Hoare annotation was computed. [2019-11-20 09:10:12,398 INFO L444 ceAbstractionStarter]: For program point L360(lines 360 375) no Hoare annotation was computed. [2019-11-20 09:10:12,399 INFO L444 ceAbstractionStarter]: For program point L294(lines 294 305) no Hoare annotation was computed. [2019-11-20 09:10:12,399 INFO L444 ceAbstractionStarter]: For program point L162(lines 162 173) no Hoare annotation was computed. [2019-11-20 09:10:12,399 INFO L444 ceAbstractionStarter]: For program point L526(lines 526 537) no Hoare annotation was computed. [2019-11-20 09:10:12,399 INFO L444 ceAbstractionStarter]: For program point L460(lines 460 475) no Hoare annotation was computed. [2019-11-20 09:10:12,399 INFO L444 ceAbstractionStarter]: For program point L394(lines 394 405) no Hoare annotation was computed. [2019-11-20 09:10:12,399 INFO L444 ceAbstractionStarter]: For program point L262(lines 262 273) no Hoare annotation was computed. [2019-11-20 09:10:12,399 INFO L444 ceAbstractionStarter]: For program point L130(lines 130 132) no Hoare annotation was computed. [2019-11-20 09:10:12,399 INFO L444 ceAbstractionStarter]: For program point L494(lines 494 505) no Hoare annotation was computed. [2019-11-20 09:10:12,400 INFO L444 ceAbstractionStarter]: For program point L362(lines 362 373) no Hoare annotation was computed. [2019-11-20 09:10:12,400 INFO L444 ceAbstractionStarter]: For program point L230(lines 230 232) no Hoare annotation was computed. [2019-11-20 09:10:12,402 INFO L444 ceAbstractionStarter]: For program point L98(lines 98 100) no Hoare annotation was computed. [2019-11-20 09:10:12,402 INFO L444 ceAbstractionStarter]: For program point L-1(line -1) no Hoare annotation was computed. [2019-11-20 09:10:12,403 INFO L444 ceAbstractionStarter]: For program point L462(lines 462 473) no Hoare annotation was computed. [2019-11-20 09:10:12,403 INFO L444 ceAbstractionStarter]: For program point L330(lines 330 332) no Hoare annotation was computed. [2019-11-20 09:10:12,404 INFO L444 ceAbstractionStarter]: For program point L198(lines 198 200) no Hoare annotation was computed. [2019-11-20 09:10:12,404 INFO L444 ceAbstractionStarter]: For program point L66(lines 66 68) no Hoare annotation was computed. [2019-11-20 09:10:12,404 INFO L444 ceAbstractionStarter]: For program point L430(lines 430 432) no Hoare annotation was computed. [2019-11-20 09:10:12,404 INFO L444 ceAbstractionStarter]: For program point L298(lines 298 300) no Hoare annotation was computed. [2019-11-20 09:10:12,404 INFO L444 ceAbstractionStarter]: For program point L166(lines 166 168) no Hoare annotation was computed. [2019-11-20 09:10:12,405 INFO L444 ceAbstractionStarter]: For program point L530(lines 530 532) no Hoare annotation was computed. [2019-11-20 09:10:12,405 INFO L444 ceAbstractionStarter]: For program point L398(lines 398 400) no Hoare annotation was computed. [2019-11-20 09:10:12,413 INFO L444 ceAbstractionStarter]: For program point L266(lines 266 268) no Hoare annotation was computed. [2019-11-20 09:10:12,423 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.11 09:10:12 BoogieIcfgContainer [2019-11-20 09:10:12,423 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-20 09:10:12,423 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-20 09:10:12,424 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-20 09:10:12,424 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-20 09:10:12,424 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 09:10:12" (3/4) ... [2019-11-20 09:10:12,427 INFO L137 WitnessPrinter]: Generating witness for correct program [2019-11-20 09:10:12,452 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2019-11-20 09:10:12,452 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2019-11-20 09:10:12,496 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_98b986d0-27d1-41ce-9b54-909f933f13e8/bin/uautomizer/witness.graphml [2019-11-20 09:10:12,496 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-20 09:10:12,498 INFO L168 Benchmark]: Toolchain (without parser) took 1915.42 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 121.6 MB). Free memory was 944.7 MB in the beginning and 1.0 GB in the end (delta: -72.1 MB). Peak memory consumption was 49.5 MB. Max. memory is 11.5 GB. [2019-11-20 09:10:12,498 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 1.0 GB. Free memory is still 962.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-20 09:10:12,499 INFO L168 Benchmark]: CACSL2BoogieTranslator took 589.01 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 121.6 MB). Free memory was 944.7 MB in the beginning and 1.1 GB in the end (delta: -158.5 MB). Peak memory consumption was 23.1 MB. Max. memory is 11.5 GB. [2019-11-20 09:10:12,500 INFO L168 Benchmark]: Boogie Procedure Inliner took 81.80 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: 7.1 MB). Peak memory consumption was 7.1 MB. Max. memory is 11.5 GB. [2019-11-20 09:10:12,500 INFO L168 Benchmark]: Boogie Preprocessor took 50.83 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: 7.1 MB). Peak memory consumption was 7.1 MB. Max. memory is 11.5 GB. [2019-11-20 09:10:12,503 INFO L168 Benchmark]: RCFGBuilder took 914.52 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 58.0 MB). Peak memory consumption was 58.0 MB. Max. memory is 11.5 GB. [2019-11-20 09:10:12,503 INFO L168 Benchmark]: TraceAbstraction took 200.39 ms. Allocated memory is still 1.2 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 14.2 MB). Peak memory consumption was 14.2 MB. Max. memory is 11.5 GB. [2019-11-20 09:10:12,503 INFO L168 Benchmark]: Witness Printer took 72.66 ms. Allocated memory is still 1.2 GB. Free memory is still 1.0 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-20 09:10:12,508 INFO L335 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 1.0 GB. Free memory is still 962.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 589.01 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 121.6 MB). Free memory was 944.7 MB in the beginning and 1.1 GB in the end (delta: -158.5 MB). Peak memory consumption was 23.1 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 81.80 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: 7.1 MB). Peak memory consumption was 7.1 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 50.83 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: 7.1 MB). Peak memory consumption was 7.1 MB. Max. memory is 11.5 GB. * RCFGBuilder took 914.52 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 58.0 MB). Peak memory consumption was 58.0 MB. Max. memory is 11.5 GB. * TraceAbstraction took 200.39 ms. Allocated memory is still 1.2 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 14.2 MB). Peak memory consumption was 14.2 MB. Max. memory is 11.5 GB. * Witness Printer took 72.66 ms. Allocated memory is still 1.2 GB. Free memory is still 1.0 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - AllSpecificationsHoldResult: All specifications hold We were not able to verify any specifiation because the program does not contain any specification. - InvariantResult [Line: 14]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 24]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 24]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 14]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 108 locations, 0 error locations. Result: SAFE, OverallTime: 0.1s, OverallIterations: 0, TraceHistogramMax: 0, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=108occurred 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: No data available, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 4 LocationsWithAnnotation, 4 PreInvPairs, 4 NumberOfFragments, 4 HoareAnnotationTreeSize, 4 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 4 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...