java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data --generate-csv --csv-dir csv -tc ../../../trunk/examples/toolchains/KojakBplInline.xml -s ../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Kojak_Default.epf -i ../../../trunk/examples/programs/20170304-DifficultPathPrograms/s3_srvr_2_alt.BV.c.cil.c_13.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-133090d [2018-10-04 10:18:26,482 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-04 10:18:26,484 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-04 10:18:26,497 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-04 10:18:26,497 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-04 10:18:26,498 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-04 10:18:26,500 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-04 10:18:26,501 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-04 10:18:26,503 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-04 10:18:26,504 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-04 10:18:26,505 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-04 10:18:26,505 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-04 10:18:26,506 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-04 10:18:26,507 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-04 10:18:26,508 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-04 10:18:26,509 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-04 10:18:26,510 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-04 10:18:26,512 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-04 10:18:26,514 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-04 10:18:26,516 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-04 10:18:26,517 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-04 10:18:26,518 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-04 10:18:26,521 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-04 10:18:26,521 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-04 10:18:26,521 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-04 10:18:26,522 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-04 10:18:26,524 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-04 10:18:26,524 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-04 10:18:26,525 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-04 10:18:26,526 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-04 10:18:26,527 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-04 10:18:26,527 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-10-04 10:18:26,528 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-04 10:18:26,528 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-04 10:18:26,529 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-04 10:18:26,530 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-04 10:18:26,530 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Kojak_Default.epf [2018-10-04 10:18:26,546 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-04 10:18:26,546 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-04 10:18:26,547 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-04 10:18:26,547 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-04 10:18:26,548 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-04 10:18:26,548 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-04 10:18:26,548 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-04 10:18:26,549 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-04 10:18:26,549 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-04 10:18:26,549 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-04 10:18:26,549 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-04 10:18:26,549 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-04 10:18:26,549 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-04 10:18:26,550 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-04 10:18:26,550 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-04 10:18:26,550 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-04 10:18:26,550 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-04 10:18:26,550 INFO L131 SettingsManager]: Preferences of CodeCheck differ from their defaults: [2018-10-04 10:18:26,551 INFO L133 SettingsManager]: * Timeout in seconds=1000000 [2018-10-04 10:18:26,551 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-04 10:18:26,551 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-04 10:18:26,551 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:10000 [2018-10-04 10:18:26,551 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-04 10:18:26,552 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-04 10:18:26,552 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-04 10:18:26,552 INFO L133 SettingsManager]: * Trace refinement strategy=PENGUIN [2018-10-04 10:18:26,552 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-04 10:18:26,552 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-04 10:18:26,553 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-04 10:18:26,600 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-04 10:18:26,613 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-04 10:18:26,617 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-04 10:18:26,619 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-10-04 10:18:26,619 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-10-04 10:18:26,620 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/s3_srvr_2_alt.BV.c.cil.c_13.bpl [2018-10-04 10:18:26,620 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/s3_srvr_2_alt.BV.c.cil.c_13.bpl' [2018-10-04 10:18:26,708 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-04 10:18:26,710 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-10-04 10:18:26,711 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-04 10:18:26,711 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-04 10:18:26,712 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-04 10:18:26,735 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "s3_srvr_2_alt.BV.c.cil.c_13.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 10:18:26" (1/1) ... [2018-10-04 10:18:26,759 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "s3_srvr_2_alt.BV.c.cil.c_13.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 10:18:26" (1/1) ... [2018-10-04 10:18:26,771 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-04 10:18:26,772 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-04 10:18:26,772 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-04 10:18:26,772 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-04 10:18:26,784 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "s3_srvr_2_alt.BV.c.cil.c_13.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 10:18:26" (1/1) ... [2018-10-04 10:18:26,784 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "s3_srvr_2_alt.BV.c.cil.c_13.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 10:18:26" (1/1) ... [2018-10-04 10:18:26,788 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "s3_srvr_2_alt.BV.c.cil.c_13.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 10:18:26" (1/1) ... [2018-10-04 10:18:26,796 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "s3_srvr_2_alt.BV.c.cil.c_13.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 10:18:26" (1/1) ... [2018-10-04 10:18:26,808 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "s3_srvr_2_alt.BV.c.cil.c_13.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 10:18:26" (1/1) ... [2018-10-04 10:18:26,817 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "s3_srvr_2_alt.BV.c.cil.c_13.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 10:18:26" (1/1) ... [2018-10-04 10:18:26,819 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "s3_srvr_2_alt.BV.c.cil.c_13.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 10:18:26" (1/1) ... [2018-10-04 10:18:26,826 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-04 10:18:26,829 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-04 10:18:26,829 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-04 10:18:26,829 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-04 10:18:26,831 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "s3_srvr_2_alt.BV.c.cil.c_13.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 10:18:26" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:10000 (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:10000 [2018-10-04 10:18:26,927 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-04 10:18:26,927 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-04 10:18:27,584 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-04 10:18:27,585 INFO L202 PluginConnector]: Adding new model s3_srvr_2_alt.BV.c.cil.c_13.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.10 10:18:27 BoogieIcfgContainer [2018-10-04 10:18:27,585 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-04 10:18:27,586 INFO L113 PluginConnector]: ------------------------CodeCheck---------------------------- [2018-10-04 10:18:27,590 INFO L271 PluginConnector]: Initializing CodeCheck... [2018-10-04 10:18:27,601 INFO L276 PluginConnector]: CodeCheck initialized [2018-10-04 10:18:27,602 INFO L185 PluginConnector]: Executing the observer CodeCheckObserver from plugin CodeCheck for "s3_srvr_2_alt.BV.c.cil.c_13.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.10 10:18:27" (1/1) ... [2018-10-04 10:18:27,614 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 10:18:27,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2018-10-04 10:18:27,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 11 states and 15 transitions. [2018-10-04 10:18:27,651 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 15 transitions. [2018-10-04 10:18:27,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-10-04 10:18:27,655 INFO L428 CodeCheckObserver]: Error Path is FOUND. [2018-10-04 10:18:27,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 10:18:27,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 10:18:28,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2018-10-04 10:18:28,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 15 states and 19 transitions. [2018-10-04 10:18:28,072 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 19 transitions. [2018-10-04 10:18:28,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-10-04 10:18:28,073 INFO L428 CodeCheckObserver]: Error Path is FOUND. [2018-10-04 10:18:28,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 10:18:28,265 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 10:18:28,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2018-10-04 10:18:28,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 22 states and 29 transitions. [2018-10-04 10:18:28,590 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 29 transitions. [2018-10-04 10:18:28,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-10-04 10:18:28,591 INFO L428 CodeCheckObserver]: Error Path is FOUND. [2018-10-04 10:18:28,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 10:18:28,743 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 10:18:28,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2018-10-04 10:18:28,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 25 states and 33 transitions. [2018-10-04 10:18:28,901 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 33 transitions. [2018-10-04 10:18:28,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-04 10:18:28,902 INFO L428 CodeCheckObserver]: Error Path is FOUND. [2018-10-04 10:18:28,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 10:18:28,993 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 10:18:29,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2018-10-04 10:18:29,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 29 states and 38 transitions. [2018-10-04 10:18:29,500 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 38 transitions. [2018-10-04 10:18:29,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-10-04 10:18:29,504 INFO L428 CodeCheckObserver]: Error Path is FOUND. [2018-10-04 10:18:29,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 10:18:29,617 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 10:18:29,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2018-10-04 10:18:29,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 34 states and 44 transitions. [2018-10-04 10:18:29,889 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 44 transitions. [2018-10-04 10:18:29,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-04 10:18:29,891 INFO L428 CodeCheckObserver]: Error Path is FOUND. [2018-10-04 10:18:29,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 10:18:30,053 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-10-04 10:18:30,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2018-10-04 10:18:30,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 35 states and 45 transitions. [2018-10-04 10:18:30,211 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2018-10-04 10:18:30,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-10-04 10:18:30,212 INFO L428 CodeCheckObserver]: Error Path is FOUND. [2018-10-04 10:18:30,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 10:18:30,263 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-10-04 10:18:30,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2018-10-04 10:18:30,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 39 states and 48 transitions. [2018-10-04 10:18:30,461 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 48 transitions. [2018-10-04 10:18:30,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-04 10:18:30,462 INFO L428 CodeCheckObserver]: Error Path is FOUND. [2018-10-04 10:18:30,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 10:18:30,558 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 10:18:30,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2018-10-04 10:18:30,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 51 states and 64 transitions. [2018-10-04 10:18:30,983 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 64 transitions. [2018-10-04 10:18:30,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-04 10:18:30,985 INFO L428 CodeCheckObserver]: Error Path is FOUND. [2018-10-04 10:18:30,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 10:18:31,397 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 10:18:31,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2018-10-04 10:18:31,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 61 states and 82 transitions. [2018-10-04 10:18:31,773 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 82 transitions. [2018-10-04 10:18:31,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-10-04 10:18:31,776 INFO L428 CodeCheckObserver]: Error Path is FOUND. [2018-10-04 10:18:31,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 10:18:31,900 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2018-10-04 10:18:32,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2018-10-04 10:18:32,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 62 states and 84 transitions. [2018-10-04 10:18:32,087 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 84 transitions. [2018-10-04 10:18:32,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-10-04 10:18:32,089 INFO L428 CodeCheckObserver]: Error Path is FOUND. [2018-10-04 10:18:32,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 10:18:32,126 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 8 proven. 24 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-10-04 10:18:32,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2018-10-04 10:18:32,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 66 states and 87 transitions. [2018-10-04 10:18:32,305 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 87 transitions. [2018-10-04 10:18:32,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-10-04 10:18:32,306 INFO L428 CodeCheckObserver]: Error Path is FOUND. [2018-10-04 10:18:32,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 10:18:32,333 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2018-10-04 10:18:33,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2018-10-04 10:18:33,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 67 states and 89 transitions. [2018-10-04 10:18:33,172 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 89 transitions. [2018-10-04 10:18:33,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-10-04 10:18:33,173 INFO L428 CodeCheckObserver]: Error Path is FOUND. [2018-10-04 10:18:33,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 10:18:33,332 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2018-10-04 10:18:33,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2018-10-04 10:18:33,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 68 states and 91 transitions. [2018-10-04 10:18:33,667 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 91 transitions. [2018-10-04 10:18:33,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-10-04 10:18:33,669 INFO L428 CodeCheckObserver]: Error Path is FOUND. [2018-10-04 10:18:33,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 10:18:33,856 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 35 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-10-04 10:18:34,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2018-10-04 10:18:34,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 74 states and 101 transitions. [2018-10-04 10:18:34,918 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 101 transitions. [2018-10-04 10:18:34,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-10-04 10:18:34,919 INFO L428 CodeCheckObserver]: Error Path is FOUND. [2018-10-04 10:18:34,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 10:18:35,631 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 48 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2018-10-04 10:18:36,530 WARN L178 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-10-04 10:18:37,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2018-10-04 10:18:37,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 74 states and 99 transitions. [2018-10-04 10:18:37,473 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 99 transitions. [2018-10-04 10:18:37,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-10-04 10:18:37,474 INFO L428 CodeCheckObserver]: Error Path is FOUND. [2018-10-04 10:18:37,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 10:18:37,515 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 61 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-10-04 10:18:37,932 WARN L178 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2018-10-04 10:18:38,485 WARN L178 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 15 [2018-10-04 10:18:39,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2018-10-04 10:18:39,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 80 states and 109 transitions. [2018-10-04 10:18:39,316 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 109 transitions. [2018-10-04 10:18:39,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-10-04 10:18:39,316 INFO L428 CodeCheckObserver]: Error Path is FOUND. [2018-10-04 10:18:39,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 10:18:39,344 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2018-10-04 10:18:39,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2018-10-04 10:18:39,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 81 states and 110 transitions. [2018-10-04 10:18:39,725 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 110 transitions. [2018-10-04 10:18:39,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-10-04 10:18:39,725 INFO L428 CodeCheckObserver]: Error Path is FOUND. [2018-10-04 10:18:39,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 10:18:39,752 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 85 proven. 4 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2018-10-04 10:18:40,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2018-10-04 10:18:40,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 52 states and 65 transitions. [2018-10-04 10:18:40,038 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 65 transitions. [2018-10-04 10:18:40,038 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-10-04 10:18:40,038 WARN L425 CodeCheckObserver]: This Program is SAFE, Check terminated with 19 iterations. [2018-10-04 10:18:40,049 INFO L778 CodeCheckObserver]: All specifications hold 1 specifications checked. All of them hold [2018-10-04 10:18:40,184 WARN L178 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 29 [2018-10-04 10:18:40,326 WARN L178 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 32 [2018-10-04 10:18:40,480 WARN L178 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 31 [2018-10-04 10:18:40,630 WARN L178 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 32 [2018-10-04 10:18:40,848 WARN L178 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 32 [2018-10-04 10:18:40,855 INFO L582 CodeCheckObserver]: Invariant with dag size 29 [2018-10-04 10:18:40,863 INFO L582 CodeCheckObserver]: Invariant with dag size 32 [2018-10-04 10:18:40,864 INFO L582 CodeCheckObserver]: Invariant with dag size 17 [2018-10-04 10:18:40,865 INFO L582 CodeCheckObserver]: Invariant with dag size 31 [2018-10-04 10:18:40,866 INFO L582 CodeCheckObserver]: Invariant with dag size 32 [2018-10-04 10:18:40,866 INFO L582 CodeCheckObserver]: Invariant with dag size 32 [2018-10-04 10:18:40,867 INFO L582 CodeCheckObserver]: Invariant with dag size 3 [2018-10-04 10:18:40,868 INFO L202 PluginConnector]: Adding new model s3_srvr_2_alt.BV.c.cil.c_13.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.codecheck CFG 04.10 10:18:40 ImpRootNode [2018-10-04 10:18:40,868 INFO L132 PluginConnector]: ------------------------ END CodeCheck---------------------------- [2018-10-04 10:18:40,869 INFO L168 Benchmark]: Toolchain (without parser) took 14160.11 ms. Allocated memory was 1.5 GB in the beginning and 1.6 GB in the end (delta: 25.2 MB). Free memory was 1.5 GB in the beginning and 1.0 GB in the end (delta: 419.0 MB). Peak memory consumption was 444.1 MB. Max. memory is 7.1 GB. [2018-10-04 10:18:40,870 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.20 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-04 10:18:40,871 INFO L168 Benchmark]: Boogie Procedure Inliner took 59.98 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-04 10:18:40,871 INFO L168 Benchmark]: Boogie Preprocessor took 54.85 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-04 10:18:40,872 INFO L168 Benchmark]: RCFGBuilder took 756.07 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 31.7 MB). Peak memory consumption was 31.7 MB. Max. memory is 7.1 GB. [2018-10-04 10:18:40,873 INFO L168 Benchmark]: CodeCheck took 13282.23 ms. Allocated memory was 1.5 GB in the beginning and 1.6 GB in the end (delta: 25.2 MB). Free memory was 1.4 GB in the beginning and 1.0 GB in the end (delta: 387.2 MB). Peak memory consumption was 412.4 MB. Max. memory is 7.1 GB. [2018-10-04 10:18:40,877 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.codecheck: - StatisticsResult: Ultimate CodeCheck benchmark data CFG has 1 procedures, 16 locations, 1 error locations. SAFE Result, 12.4s OverallTime, 19 OverallIterations, 0 TraceHistogramMax, 0.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 393216 SDtfs, 3619658 SDslu, 1604470 SDs, 0 SdLazy, 8865786 SolverSat, 1721114 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 13.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3254 GetRequests, 3058 SyntacticMatches, 62 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8232 ImplicationChecksByTransitivity, 10.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=-1occurred in iteration=-1, traceCheckStatistics: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 2.4s InterpolantComputationTime, 419 NumberOfCodeBlocks, 419 NumberOfCodeBlocksAsserted, 18 NumberOfCheckSat, 401 ConstructedInterpolants, 0 QuantifiedInterpolants, 18018 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 18 InterpolantComputations, 11 PerfectInterpolantSequences, 554/616 InterpolantCoveringCapability, 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: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: No data available, ReuseStatistics: No data available - PositiveResult [Line: 382]: assertion always holds For all program executions holds that assertion always holds at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 298]: Loop Invariant Derived loop invariant: (((((ssl3_accept_~blastFlag~4 == 1 || (ssl3_accept_~blastFlag~4 <= 1 && 8656 == ssl3_accept_~s__state~4)) || (ssl3_accept_~blastFlag~4 <= 3 && 8672 == ssl3_accept_~s__state~4)) || ((8448 == ssl3_accept_~s__state~4 && 8640 <= ssl3_accept_~s__s3__tmp__next_state___0~4) && ssl3_accept_~s__s3__tmp__next_state___0~4 <= 8640)) || (ssl3_accept_~blastFlag~4 == 2 && 8656 == ssl3_accept_~s__state~4)) || (ssl3_accept_~blastFlag~4 <= 1 && 8640 <= ssl3_accept_~s__s3__tmp__next_state___0~4)) || ((!(8656 == ssl3_accept_~s__state~4) && !(8672 == ssl3_accept_~s__state~4)) && !(8448 == ssl3_accept_~s__state~4)) - InvariantResult [Line: 241]: Loop Invariant Derived loop invariant: (((((ssl3_accept_~blastFlag~4 == 1 || (ssl3_accept_~blastFlag~4 <= 1 && 8656 == ssl3_accept_~s__state~4)) || (((!(8656 == ssl3_accept_~s__state~4) && !(8672 == ssl3_accept_~s__state~4)) && !(8496 == ssl3_accept_~s__state~4)) && !(8448 == ssl3_accept_~s__state~4))) || ((8448 == ssl3_accept_~s__state~4 && 8640 <= ssl3_accept_~s__s3__tmp__next_state___0~4) && ssl3_accept_~s__s3__tmp__next_state___0~4 <= 8640)) || (ssl3_accept_~blastFlag~4 <= 3 && 8672 == ssl3_accept_~s__state~4)) || (ssl3_accept_~blastFlag~4 == 2 && 8656 == ssl3_accept_~s__state~4)) || ((8448 == ssl3_accept_~s__state~4 && ssl3_accept_~blastFlag~4 <= 1) && 8640 <= ssl3_accept_~s__s3__tmp__next_state___0~4) - InvariantResult [Line: 327]: Loop Invariant Derived loop invariant: ((ssl3_accept_~blastFlag~4 <= 1 || (ssl3_accept_~blastFlag~4 <= 3 && 8672 == ssl3_accept_~s__state~4)) || ssl3_accept_~blastFlag~4 == 2) || (!(8656 == ssl3_accept_~s__state~4) && !(8672 == ssl3_accept_~s__state~4)) - InvariantResult [Line: 269]: Loop Invariant Derived loop invariant: (((((((ssl3_accept_~blastFlag~4 <= 1 && 8640 <= ssl3_accept_~s__state~4) || ((ssl3_accept_~blastFlag~4 <= 1 && ssl3_accept_~s__state~4 <= 8448) && 8640 <= ssl3_accept_~s__s3__tmp__next_state___0~4)) || ((((!(8656 == ssl3_accept_~s__state~4) && 8640 <= ssl3_accept_~s__s3__tmp__next_state___0~4) && 8640 <= ssl3_accept_~s__state~4) && ssl3_accept_~blastFlag~4 <= 3) && ssl3_accept_~s__s3__tmp__next_state___0~4 <= 8640)) || ssl3_accept_~blastFlag~4 == 1) || (ssl3_accept_~blastFlag~4 == 2 && 8656 == ssl3_accept_~s__state~4)) || (((ssl3_accept_~s__state~4 <= 8448 && 8640 <= ssl3_accept_~s__s3__tmp__next_state___0~4) && ssl3_accept_~blastFlag~4 <= 3) && ssl3_accept_~s__s3__tmp__next_state___0~4 <= 8640)) || ((ssl3_accept_~s__state~4 <= 8640 && 3 < ssl3_accept_~blastFlag~4) && 8640 <= ssl3_accept_~s__state~4)) || (8672 <= ssl3_accept_~s__state~4 && ssl3_accept_~blastFlag~4 <= 3) - InvariantResult [Line: 274]: Loop Invariant Derived loop invariant: (((((ssl3_accept_~blastFlag~4 == 1 || (ssl3_accept_~blastFlag~4 <= 1 && 8656 == ssl3_accept_~s__state~4)) || (((!(8656 == ssl3_accept_~s__state~4) && !(8672 == ssl3_accept_~s__state~4)) && !(8496 == ssl3_accept_~s__state~4)) && !(8448 == ssl3_accept_~s__state~4))) || (ssl3_accept_~blastFlag~4 <= 3 && 8672 == ssl3_accept_~s__state~4)) || ((8448 == ssl3_accept_~s__state~4 && 8640 <= ssl3_accept_~s__s3__tmp__next_state___0~4) && ssl3_accept_~s__s3__tmp__next_state___0~4 <= 8640)) || (ssl3_accept_~blastFlag~4 == 2 && 8656 == ssl3_accept_~s__state~4)) || ((8448 == ssl3_accept_~s__state~4 && ssl3_accept_~blastFlag~4 <= 1) && 8640 <= ssl3_accept_~s__s3__tmp__next_state___0~4) - InvariantResult [Line: 254]: Loop Invariant Derived loop invariant: (((((ssl3_accept_~blastFlag~4 == 1 || (ssl3_accept_~blastFlag~4 <= 1 && 8656 == ssl3_accept_~s__state~4)) || (((!(8656 == ssl3_accept_~s__state~4) && !(8672 == ssl3_accept_~s__state~4)) && !(8496 == ssl3_accept_~s__state~4)) && !(8448 == ssl3_accept_~s__state~4))) || (ssl3_accept_~blastFlag~4 <= 3 && 8672 == ssl3_accept_~s__state~4)) || ((8448 == ssl3_accept_~s__state~4 && 8640 <= ssl3_accept_~s__s3__tmp__next_state___0~4) && ssl3_accept_~s__s3__tmp__next_state___0~4 <= 8640)) || (ssl3_accept_~blastFlag~4 == 2 && 8656 == ssl3_accept_~s__state~4)) || ((8448 == ssl3_accept_~s__state~4 && ssl3_accept_~blastFlag~4 <= 1) && 8640 <= ssl3_accept_~s__s3__tmp__next_state___0~4) - InvariantResult [Line: 351]: Loop Invariant Derived loop invariant: ssl3_accept_~blastFlag~4 <= 3 * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.20 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 59.98 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 54.85 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 756.07 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 31.7 MB). Peak memory consumption was 31.7 MB. Max. memory is 7.1 GB. * CodeCheck took 13282.23 ms. Allocated memory was 1.5 GB in the beginning and 1.6 GB in the end (delta: 25.2 MB). Free memory was 1.4 GB in the beginning and 1.0 GB in the end (delta: 387.2 MB). Peak memory consumption was 412.4 MB. Max. memory is 7.1 GB. RESULT: Ultimate proved your program to be correct! Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/s3_srvr_2_alt.BV.c.cil.c_13.bpl_svcomp-Reach-32bit-Kojak_Default.epf_KojakBplInline.xml/Csv-CodeCheckBenchmarks-0-2018-10-04_10-18-40-893.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/s3_srvr_2_alt.BV.c.cil.c_13.bpl_svcomp-Reach-32bit-Kojak_Default.epf_KojakBplInline.xml/Csv-Benchmark-0-2018-10-04_10-18-40-893.csv Received shutdown request...