java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem14_label17.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-673a906-m [2019-10-02 20:31:22,148 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-02 20:31:22,150 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-02 20:31:22,162 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-10-02 20:31:22,194 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-02 20:31:22,195 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-02 20:31:22,196 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-02 20:31:22,196 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf [2019-10-02 20:31:22,218 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-02 20:31:22,218 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-02 20:31:22,219 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-10-02 20:31:22,219 INFO L138 SettingsManager]: * Log level for plugins=info [2019-10-02 20:31:22,220 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-10-02 20:31:22,220 INFO L138 SettingsManager]: * User list type=DISABLED [2019-10-02 20:31:22,220 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-10-02 20:31:22,220 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-10-02 20:31:22,221 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-10-02 20:31:22,221 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-10-02 20:31:22,222 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-02 20:31:22,222 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-02 20:31:22,222 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-02 20:31:22,224 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-02 20:31:22,224 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-02 20:31:22,224 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-02 20:31:22,224 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-02 20:31:22,224 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-02 20:31:22,225 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-02 20:31:22,225 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-02 20:31:22,225 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-02 20:31:22,226 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-10-02 20:31:22,226 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-02 20:31:22,226 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-02 20:31:22,226 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-02 20:31:22,226 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-02 20:31:22,227 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-10-02 20:31:22,227 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-02 20:31:22,228 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-02 20:31:22,228 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-10-02 20:31:22,272 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-02 20:31:22,283 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-02 20:31:22,286 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-02 20:31:22,287 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-02 20:31:22,287 INFO L275 PluginConnector]: CDTParser initialized [2019-10-02 20:31:22,288 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label17.c [2019-10-02 20:31:22,354 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1553f9c17/80c7328e84344f1b8deae415e598206b/FLAG1e3c03971 [2019-10-02 20:31:22,969 INFO L306 CDTParser]: Found 1 translation units. [2019-10-02 20:31:22,970 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label17.c [2019-10-02 20:31:22,984 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1553f9c17/80c7328e84344f1b8deae415e598206b/FLAG1e3c03971 [2019-10-02 20:31:23,193 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1553f9c17/80c7328e84344f1b8deae415e598206b [2019-10-02 20:31:23,204 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-02 20:31:23,206 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-02 20:31:23,207 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-02 20:31:23,207 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-02 20:31:23,212 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-02 20:31:23,214 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.10 08:31:23" (1/1) ... [2019-10-02 20:31:23,217 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6553a585 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 08:31:23, skipping insertion in model container [2019-10-02 20:31:23,218 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.10 08:31:23" (1/1) ... [2019-10-02 20:31:23,225 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-02 20:31:23,296 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-02 20:31:23,899 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-02 20:31:23,906 INFO L188 MainTranslator]: Completed pre-run [2019-10-02 20:31:24,226 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-02 20:31:24,250 INFO L192 MainTranslator]: Completed translation [2019-10-02 20:31:24,250 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 08:31:24 WrapperNode [2019-10-02 20:31:24,251 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-02 20:31:24,252 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-02 20:31:24,252 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-02 20:31:24,252 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-02 20:31:24,274 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 08:31:24" (1/1) ... [2019-10-02 20:31:24,276 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 08:31:24" (1/1) ... [2019-10-02 20:31:24,315 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 08:31:24" (1/1) ... [2019-10-02 20:31:24,319 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 08:31:24" (1/1) ... [2019-10-02 20:31:24,402 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 08:31:24" (1/1) ... [2019-10-02 20:31:24,424 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 08:31:24" (1/1) ... [2019-10-02 20:31:24,440 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 08:31:24" (1/1) ... [2019-10-02 20:31:24,458 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-02 20:31:24,459 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-02 20:31:24,459 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-02 20:31:24,460 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-02 20:31:24,461 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 08:31:24" (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: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 [2019-10-02 20:31:24,544 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-02 20:31:24,545 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-02 20:31:24,545 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-02 20:31:24,545 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-02 20:31:24,546 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-02 20:31:24,546 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-02 20:31:24,546 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-02 20:31:24,546 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-02 20:31:24,546 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-02 20:31:24,546 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-02 20:31:24,547 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-02 20:31:26,092 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-02 20:31:26,093 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-02 20:31:26,094 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 08:31:26 BoogieIcfgContainer [2019-10-02 20:31:26,094 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-02 20:31:26,097 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-02 20:31:26,097 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-02 20:31:26,101 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-02 20:31:26,101 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.10 08:31:23" (1/3) ... [2019-10-02 20:31:26,102 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3dc6a1b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 08:31:26, skipping insertion in model container [2019-10-02 20:31:26,102 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 08:31:24" (2/3) ... [2019-10-02 20:31:26,103 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3dc6a1b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 08:31:26, skipping insertion in model container [2019-10-02 20:31:26,103 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 08:31:26" (3/3) ... [2019-10-02 20:31:26,104 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem14_label17.c [2019-10-02 20:31:26,115 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-02 20:31:26,125 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-02 20:31:26,143 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-02 20:31:26,174 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-10-02 20:31:26,175 INFO L378 AbstractCegarLoop]: Hoare is false [2019-10-02 20:31:26,175 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-02 20:31:26,175 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-02 20:31:26,175 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-02 20:31:26,175 INFO L382 AbstractCegarLoop]: Difference is false [2019-10-02 20:31:26,175 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-02 20:31:26,176 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-02 20:31:26,212 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states. [2019-10-02 20:31:26,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2019-10-02 20:31:26,228 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 20:31:26,230 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 20:31:26,232 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 20:31:26,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 20:31:26,241 INFO L82 PathProgramCache]: Analyzing trace with hash -950257557, now seen corresponding path program 1 times [2019-10-02 20:31:26,244 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 20:31:26,306 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 20:31:26,306 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 20:31:26,306 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 20:31:26,307 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 20:31:26,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 20:31:26,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 20:31:26,672 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 20:31:26,672 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-02 20:31:26,673 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 20:31:26,679 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-02 20:31:26,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-02 20:31:26,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-02 20:31:26,697 INFO L87 Difference]: Start difference. First operand 254 states. Second operand 3 states. [2019-10-02 20:31:28,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 20:31:28,012 INFO L93 Difference]: Finished difference Result 440 states and 701 transitions. [2019-10-02 20:31:28,014 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-02 20:31:28,015 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 62 [2019-10-02 20:31:28,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 20:31:28,043 INFO L225 Difference]: With dead ends: 440 [2019-10-02 20:31:28,044 INFO L226 Difference]: Without dead ends: 372 [2019-10-02 20:31:28,046 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-02 20:31:28,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2019-10-02 20:31:28,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 372. [2019-10-02 20:31:28,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 372 states. [2019-10-02 20:31:28,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 584 transitions. [2019-10-02 20:31:28,141 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 584 transitions. Word has length 62 [2019-10-02 20:31:28,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 20:31:28,142 INFO L475 AbstractCegarLoop]: Abstraction has 372 states and 584 transitions. [2019-10-02 20:31:28,142 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-02 20:31:28,142 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 584 transitions. [2019-10-02 20:31:28,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2019-10-02 20:31:28,149 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 20:31:28,149 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 20:31:28,150 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 20:31:28,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 20:31:28,150 INFO L82 PathProgramCache]: Analyzing trace with hash -955889055, now seen corresponding path program 1 times [2019-10-02 20:31:28,151 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 20:31:28,154 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 20:31:28,154 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 20:31:28,154 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 20:31:28,155 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 20:31:28,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 20:31:28,402 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 20:31:28,403 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 20:31:28,403 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-02 20:31:28,403 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 20:31:28,405 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-02 20:31:28,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-02 20:31:28,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-02 20:31:28,406 INFO L87 Difference]: Start difference. First operand 372 states and 584 transitions. Second operand 6 states. [2019-10-02 20:31:29,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 20:31:29,695 INFO L93 Difference]: Finished difference Result 760 states and 1121 transitions. [2019-10-02 20:31:29,695 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-02 20:31:29,696 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 141 [2019-10-02 20:31:29,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 20:31:29,702 INFO L225 Difference]: With dead ends: 760 [2019-10-02 20:31:29,702 INFO L226 Difference]: Without dead ends: 760 [2019-10-02 20:31:29,703 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-10-02 20:31:29,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 760 states. [2019-10-02 20:31:29,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 760 to 748. [2019-10-02 20:31:29,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 748 states. [2019-10-02 20:31:29,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 748 states to 748 states and 1095 transitions. [2019-10-02 20:31:29,749 INFO L78 Accepts]: Start accepts. Automaton has 748 states and 1095 transitions. Word has length 141 [2019-10-02 20:31:29,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 20:31:29,750 INFO L475 AbstractCegarLoop]: Abstraction has 748 states and 1095 transitions. [2019-10-02 20:31:29,750 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-02 20:31:29,750 INFO L276 IsEmpty]: Start isEmpty. Operand 748 states and 1095 transitions. [2019-10-02 20:31:29,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2019-10-02 20:31:29,759 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 20:31:29,760 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 20:31:29,760 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 20:31:29,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 20:31:29,761 INFO L82 PathProgramCache]: Analyzing trace with hash -1117315654, now seen corresponding path program 1 times [2019-10-02 20:31:29,761 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 20:31:29,762 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 20:31:29,763 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 20:31:29,763 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 20:31:29,763 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 20:31:29,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 20:31:29,899 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 20:31:29,899 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 20:31:29,899 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-02 20:31:29,900 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 20:31:29,900 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-02 20:31:29,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-02 20:31:29,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-02 20:31:29,901 INFO L87 Difference]: Start difference. First operand 748 states and 1095 transitions. Second operand 4 states. [2019-10-02 20:31:31,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 20:31:31,358 INFO L93 Difference]: Finished difference Result 1116 states and 1502 transitions. [2019-10-02 20:31:31,359 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-02 20:31:31,359 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 174 [2019-10-02 20:31:31,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 20:31:31,367 INFO L225 Difference]: With dead ends: 1116 [2019-10-02 20:31:31,368 INFO L226 Difference]: Without dead ends: 1116 [2019-10-02 20:31:31,368 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-02 20:31:31,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1116 states. [2019-10-02 20:31:31,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1116 to 932. [2019-10-02 20:31:31,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 932 states. [2019-10-02 20:31:31,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 932 states to 932 states and 1253 transitions. [2019-10-02 20:31:31,399 INFO L78 Accepts]: Start accepts. Automaton has 932 states and 1253 transitions. Word has length 174 [2019-10-02 20:31:31,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 20:31:31,400 INFO L475 AbstractCegarLoop]: Abstraction has 932 states and 1253 transitions. [2019-10-02 20:31:31,400 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-02 20:31:31,400 INFO L276 IsEmpty]: Start isEmpty. Operand 932 states and 1253 transitions. [2019-10-02 20:31:31,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2019-10-02 20:31:31,409 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 20:31:31,410 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 20:31:31,410 INFO L418 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 20:31:31,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 20:31:31,410 INFO L82 PathProgramCache]: Analyzing trace with hash -1149985643, now seen corresponding path program 1 times [2019-10-02 20:31:31,411 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 20:31:31,412 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 20:31:31,412 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 20:31:31,412 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 20:31:31,412 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 20:31:31,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 20:31:31,650 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 20:31:31,651 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 20:31:31,651 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-02 20:31:31,651 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 20:31:31,652 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-02 20:31:31,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-02 20:31:31,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-02 20:31:31,654 INFO L87 Difference]: Start difference. First operand 932 states and 1253 transitions. Second operand 4 states. [2019-10-02 20:31:33,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 20:31:33,314 INFO L93 Difference]: Finished difference Result 1850 states and 2420 transitions. [2019-10-02 20:31:33,315 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-02 20:31:33,315 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 227 [2019-10-02 20:31:33,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 20:31:33,317 INFO L225 Difference]: With dead ends: 1850 [2019-10-02 20:31:33,317 INFO L226 Difference]: Without dead ends: 0 [2019-10-02 20:31:33,317 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-02 20:31:33,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-10-02 20:31:33,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-10-02 20:31:33,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-10-02 20:31:33,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-10-02 20:31:33,318 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 227 [2019-10-02 20:31:33,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 20:31:33,319 INFO L475 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-10-02 20:31:33,319 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-02 20:31:33,319 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-10-02 20:31:33,319 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-10-02 20:31:33,325 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.10 08:31:33 BoogieIcfgContainer [2019-10-02 20:31:33,325 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-10-02 20:31:33,329 INFO L168 Benchmark]: Toolchain (without parser) took 10121.66 ms. Allocated memory was 133.2 MB in the beginning and 365.4 MB in the end (delta: 232.3 MB). Free memory was 85.6 MB in the beginning and 168.2 MB in the end (delta: -82.5 MB). Peak memory consumption was 149.8 MB. Max. memory is 7.1 GB. [2019-10-02 20:31:33,330 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 133.2 MB. Free memory was 106.2 MB in the beginning and 106.0 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. [2019-10-02 20:31:33,331 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1044.35 ms. Allocated memory was 133.2 MB in the beginning and 205.0 MB in the end (delta: 71.8 MB). Free memory was 85.2 MB in the beginning and 165.7 MB in the end (delta: -80.4 MB). Peak memory consumption was 40.9 MB. Max. memory is 7.1 GB. [2019-10-02 20:31:33,332 INFO L168 Benchmark]: Boogie Preprocessor took 207.00 ms. Allocated memory is still 205.0 MB. Free memory was 165.7 MB in the beginning and 160.2 MB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 7.1 GB. [2019-10-02 20:31:33,333 INFO L168 Benchmark]: RCFGBuilder took 1635.33 ms. Allocated memory was 205.0 MB in the beginning and 229.6 MB in the end (delta: 24.6 MB). Free memory was 160.2 MB in the beginning and 155.2 MB in the end (delta: 5.0 MB). Peak memory consumption was 87.1 MB. Max. memory is 7.1 GB. [2019-10-02 20:31:33,335 INFO L168 Benchmark]: TraceAbstraction took 7228.14 ms. Allocated memory was 229.6 MB in the beginning and 365.4 MB in the end (delta: 135.8 MB). Free memory was 155.2 MB in the beginning and 168.2 MB in the end (delta: -12.9 MB). Peak memory consumption was 122.9 MB. Max. memory is 7.1 GB. [2019-10-02 20:31:33,339 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 133.2 MB. Free memory was 106.2 MB in the beginning and 106.0 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 1044.35 ms. Allocated memory was 133.2 MB in the beginning and 205.0 MB in the end (delta: 71.8 MB). Free memory was 85.2 MB in the beginning and 165.7 MB in the end (delta: -80.4 MB). Peak memory consumption was 40.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 207.00 ms. Allocated memory is still 205.0 MB. Free memory was 165.7 MB in the beginning and 160.2 MB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 1635.33 ms. Allocated memory was 205.0 MB in the beginning and 229.6 MB in the end (delta: 24.6 MB). Free memory was 160.2 MB in the beginning and 155.2 MB in the end (delta: 5.0 MB). Peak memory consumption was 87.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 7228.14 ms. Allocated memory was 229.6 MB in the beginning and 365.4 MB in the end (delta: 135.8 MB). Free memory was 155.2 MB in the beginning and 168.2 MB in the end (delta: -12.9 MB). Peak memory consumption was 122.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 172]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 254 locations, 1 error locations. SAFE Result, 7.1s OverallTime, 4 OverallIterations, 2 TraceHistogramMax, 5.7s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 176 SDtfs, 1372 SDslu, 93 SDs, 0 SdLazy, 3389 SolverSat, 783 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 4.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 25 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=932occurred in iteration=3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 4 MinimizatonAttempts, 196 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 604 NumberOfCodeBlocks, 604 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 600 ConstructedInterpolants, 0 QuantifiedInterpolants, 203567 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 4 InterpolantComputations, 4 PerfectInterpolantSequences, 165/165 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...