/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf -i ../../../trunk/examples/svcomp/loops-crafted-1/theatreSquare.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 19:07:28,572 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 19:07:28,574 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 19:07:28,613 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-20 19:07:28,629 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-20 19:07:28,631 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-20 19:07:28,632 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-20 19:07:28,635 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-20 19:07:28,636 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-20 19:07:28,637 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-20 19:07:28,639 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-20 19:07:28,644 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-20 19:07:28,646 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-20 19:07:28,648 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-20 19:07:28,648 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-20 19:07:28,649 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-20 19:07:28,651 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-20 19:07:28,656 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-20 19:07:28,664 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 19:07:28,665 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 19:07:28,667 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 19:07:28,668 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-03-20 19:07:28,679 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 19:07:28,679 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 19:07:28,682 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 19:07:28,682 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 19:07:28,682 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 19:07:28,682 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 19:07:28,682 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 19:07:28,682 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 19:07:28,682 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 19:07:28,683 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 19:07:28,684 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 19:07:28,684 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 19:07:28,684 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 19:07:28,684 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-20 19:07:28,684 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 19:07:28,684 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 19:07:28,685 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 19:07:28,685 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-20 19:07:28,685 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-20 19:07:28,685 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-20 19:07:28,685 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-20 19:07:28,685 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-03-20 19:07:28,685 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 19:07:28,917 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 19:07:28,947 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 19:07:28,949 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 19:07:28,950 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 19:07:28,951 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 19:07:28,952 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/theatreSquare.c [2022-03-20 19:07:29,007 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/54442403b/2f7c55df996b4a0b88540fb650440c6d/FLAG067627347 [2022-03-20 19:07:29,396 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 19:07:29,397 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/theatreSquare.c [2022-03-20 19:07:29,407 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/54442403b/2f7c55df996b4a0b88540fb650440c6d/FLAG067627347 [2022-03-20 19:07:29,808 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/54442403b/2f7c55df996b4a0b88540fb650440c6d [2022-03-20 19:07:29,810 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 19:07:29,811 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-20 19:07:29,814 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 19:07:29,814 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 19:07:29,818 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 19:07:29,818 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 07:07:29" (1/1) ... [2022-03-20 19:07:29,820 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@176a678e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 07:07:29, skipping insertion in model container [2022-03-20 19:07:29,820 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 07:07:29" (1/1) ... [2022-03-20 19:07:29,825 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 19:07:29,844 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 19:07:30,005 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/theatreSquare.c[370,383] [2022-03-20 19:07:30,022 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 19:07:30,028 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 19:07:30,036 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/theatreSquare.c[370,383] [2022-03-20 19:07:30,042 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 19:07:30,052 INFO L208 MainTranslator]: Completed translation [2022-03-20 19:07:30,052 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 07:07:30 WrapperNode [2022-03-20 19:07:30,052 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 19:07:30,053 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 19:07:30,054 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 19:07:30,054 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 19:07:30,061 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 07:07:30" (1/1) ... [2022-03-20 19:07:30,062 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 07:07:30" (1/1) ... [2022-03-20 19:07:30,067 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 07:07:30" (1/1) ... [2022-03-20 19:07:30,067 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 07:07:30" (1/1) ... [2022-03-20 19:07:30,071 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 07:07:30" (1/1) ... [2022-03-20 19:07:30,075 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 07:07:30" (1/1) ... [2022-03-20 19:07:30,076 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 07:07:30" (1/1) ... [2022-03-20 19:07:30,078 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 19:07:30,078 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 19:07:30,079 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 19:07:30,079 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 19:07:30,079 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 07:07:30" (1/1) ... [2022-03-20 19:07:30,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 19:07:30,093 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:07:30,105 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-20 19:07:30,111 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-20 19:07:30,147 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 19:07:30,147 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 19:07:30,147 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 19:07:30,147 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 19:07:30,147 INFO L138 BoogieDeclarations]: Found implementation of procedure correct_version [2022-03-20 19:07:30,148 INFO L138 BoogieDeclarations]: Found implementation of procedure student_version [2022-03-20 19:07:30,148 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 19:07:30,148 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 19:07:30,148 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 19:07:30,148 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 19:07:30,148 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 19:07:30,148 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-20 19:07:30,148 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 19:07:30,148 INFO L130 BoogieDeclarations]: Found specification of procedure correct_version [2022-03-20 19:07:30,148 INFO L130 BoogieDeclarations]: Found specification of procedure student_version [2022-03-20 19:07:30,148 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 19:07:30,149 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 19:07:30,149 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 19:07:30,149 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 19:07:30,149 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 19:07:30,149 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 19:07:30,149 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 19:07:30,202 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 19:07:30,204 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 19:07:30,376 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 19:07:30,381 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 19:07:30,381 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2022-03-20 19:07:30,383 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 07:07:30 BoogieIcfgContainer [2022-03-20 19:07:30,383 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 19:07:30,384 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 19:07:30,384 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 19:07:30,388 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 19:07:30,388 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 07:07:29" (1/3) ... [2022-03-20 19:07:30,389 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42baef3c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 07:07:30, skipping insertion in model container [2022-03-20 19:07:30,389 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 07:07:30" (2/3) ... [2022-03-20 19:07:30,389 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42baef3c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 07:07:30, skipping insertion in model container [2022-03-20 19:07:30,389 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 07:07:30" (3/3) ... [2022-03-20 19:07:30,390 INFO L111 eAbstractionObserver]: Analyzing ICFG theatreSquare.c [2022-03-20 19:07:30,395 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-20 19:07:30,395 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 19:07:30,449 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 19:07:30,456 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-20 19:07:30,457 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 19:07:30,474 INFO L276 IsEmpty]: Start isEmpty. Operand has 39 states, 27 states have (on average 1.5555555555555556) internal successors, (42), 28 states have internal predecessors, (42), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-20 19:07:30,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-03-20 19:07:30,492 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:07:30,492 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:07:30,493 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:07:30,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:07:30,501 INFO L85 PathProgramCache]: Analyzing trace with hash 1554304209, now seen corresponding path program 1 times [2022-03-20 19:07:30,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:07:30,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1555586552] [2022-03-20 19:07:30,519 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 19:07:30,520 INFO L85 PathProgramCache]: Analyzing trace with hash 1554304209, now seen corresponding path program 2 times [2022-03-20 19:07:30,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:07:30,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613369328] [2022-03-20 19:07:30,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:07:30,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:07:30,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:07:30,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:07:30,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:07:30,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:07:30,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:07:30,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613369328] [2022-03-20 19:07:30,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613369328] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:07:30,785 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:07:30,785 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 19:07:30,787 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:07:30,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1555586552] [2022-03-20 19:07:30,788 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1555586552] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:07:30,788 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:07:30,788 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 19:07:30,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131158678] [2022-03-20 19:07:30,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:07:30,792 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 19:07:30,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:07:30,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 19:07:30,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-20 19:07:30,822 INFO L87 Difference]: Start difference. First operand has 39 states, 27 states have (on average 1.5555555555555556) internal successors, (42), 28 states have internal predecessors, (42), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:07:31,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:07:31,086 INFO L93 Difference]: Finished difference Result 76 states and 103 transitions. [2022-03-20 19:07:31,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 19:07:31,088 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-03-20 19:07:31,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:07:31,093 INFO L225 Difference]: With dead ends: 76 [2022-03-20 19:07:31,093 INFO L226 Difference]: Without dead ends: 32 [2022-03-20 19:07:31,096 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-03-20 19:07:31,099 INFO L913 BasicCegarLoop]: 40 mSDtfsCounter, 46 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 19:07:31,100 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 61 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 19:07:31,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-03-20 19:07:31,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-03-20 19:07:31,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 23 states have internal predecessors, (29), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 19:07:31,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2022-03-20 19:07:31,129 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 11 [2022-03-20 19:07:31,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:07:31,130 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2022-03-20 19:07:31,131 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:07:31,131 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2022-03-20 19:07:31,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-20 19:07:31,132 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:07:31,132 INFO L499 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] [2022-03-20 19:07:31,132 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 19:07:31,133 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:07:31,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:07:31,135 INFO L85 PathProgramCache]: Analyzing trace with hash 362112746, now seen corresponding path program 1 times [2022-03-20 19:07:31,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:07:31,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1777173422] [2022-03-20 19:07:31,140 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 19:07:31,140 INFO L85 PathProgramCache]: Analyzing trace with hash 362112746, now seen corresponding path program 2 times [2022-03-20 19:07:31,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:07:31,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545395084] [2022-03-20 19:07:31,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:07:31,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:07:31,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:07:31,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:07:31,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:07:31,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 19:07:31,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:07:31,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-20 19:07:31,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:07:31,394 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:07:31,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:07:31,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545395084] [2022-03-20 19:07:31,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545395084] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:07:31,399 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:07:31,399 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-20 19:07:31,399 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:07:31,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1777173422] [2022-03-20 19:07:31,399 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1777173422] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:07:31,399 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:07:31,399 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-20 19:07:31,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226935724] [2022-03-20 19:07:31,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:07:31,400 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-20 19:07:31,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:07:31,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-20 19:07:31,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2022-03-20 19:07:31,401 INFO L87 Difference]: Start difference. First operand 32 states and 37 transitions. Second operand has 13 states, 11 states have (on average 2.090909090909091) internal successors, (23), 9 states have internal predecessors, (23), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 19:07:31,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:07:31,718 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2022-03-20 19:07:31,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-20 19:07:31,721 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 2.090909090909091) internal successors, (23), 9 states have internal predecessors, (23), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 31 [2022-03-20 19:07:31,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:07:31,729 INFO L225 Difference]: With dead ends: 50 [2022-03-20 19:07:31,730 INFO L226 Difference]: Without dead ends: 44 [2022-03-20 19:07:31,731 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2022-03-20 19:07:31,733 INFO L913 BasicCegarLoop]: 28 mSDtfsCounter, 42 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 335 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 19:07:31,733 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 80 Invalid, 356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 335 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 19:07:31,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-03-20 19:07:31,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2022-03-20 19:07:31,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 32 states have internal predecessors, (38), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-03-20 19:07:31,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2022-03-20 19:07:31,758 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 31 [2022-03-20 19:07:31,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:07:31,759 INFO L478 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2022-03-20 19:07:31,759 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 2.090909090909091) internal successors, (23), 9 states have internal predecessors, (23), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 19:07:31,759 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2022-03-20 19:07:31,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-20 19:07:31,761 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:07:31,761 INFO L499 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] [2022-03-20 19:07:31,761 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-20 19:07:31,761 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:07:31,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:07:31,762 INFO L85 PathProgramCache]: Analyzing trace with hash -310269904, now seen corresponding path program 1 times [2022-03-20 19:07:31,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:07:31,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [968384738] [2022-03-20 19:07:56,211 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:07:56,213 INFO L85 PathProgramCache]: Analyzing trace with hash 470809425, now seen corresponding path program 1 times [2022-03-20 19:07:56,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:07:56,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602065127] [2022-03-20 19:07:56,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:07:56,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:07:56,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:07:56,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:07:56,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:07:56,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 19:07:56,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:07:56,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-20 19:07:56,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:07:56,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:07:56,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:07:56,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602065127] [2022-03-20 19:07:56,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602065127] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:07:56,288 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:07:56,288 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 19:07:56,442 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:07:56,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [968384738] [2022-03-20 19:07:56,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [968384738] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:07:56,442 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:07:56,443 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-20 19:07:56,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209373075] [2022-03-20 19:07:56,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:07:56,444 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-20 19:07:56,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:07:56,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-20 19:07:56,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2022-03-20 19:07:56,445 INFO L87 Difference]: Start difference. First operand 42 states and 50 transitions. Second operand has 12 states, 8 states have (on average 3.0) internal successors, (24), 10 states have internal predecessors, (24), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 19:07:56,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:07:56,681 INFO L93 Difference]: Finished difference Result 74 states and 91 transitions. [2022-03-20 19:07:56,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-20 19:07:56,682 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 8 states have (on average 3.0) internal successors, (24), 10 states have internal predecessors, (24), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 32 [2022-03-20 19:07:56,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:07:56,682 INFO L225 Difference]: With dead ends: 74 [2022-03-20 19:07:56,682 INFO L226 Difference]: Without dead ends: 0 [2022-03-20 19:07:56,683 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2022-03-20 19:07:56,683 INFO L913 BasicCegarLoop]: 32 mSDtfsCounter, 49 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 36 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 19:07:56,684 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 69 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 190 Invalid, 0 Unknown, 36 Unchecked, 0.1s Time] [2022-03-20 19:07:56,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-03-20 19:07:56,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-03-20 19:07:56,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-20 19:07:56,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-03-20 19:07:56,686 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 32 [2022-03-20 19:07:56,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:07:56,686 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-03-20 19:07:56,686 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 8 states have (on average 3.0) internal successors, (24), 10 states have internal predecessors, (24), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 19:07:56,686 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-03-20 19:07:56,686 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-03-20 19:07:56,689 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-20 19:07:56,689 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-20 19:07:56,691 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-03-20 19:07:56,897 INFO L882 garLoopResultBuilder]: For program point reach_errorEXIT(line 3) no Hoare annotation was computed. [2022-03-20 19:07:56,898 INFO L882 garLoopResultBuilder]: For program point reach_errorENTRY(line 3) no Hoare annotation was computed. [2022-03-20 19:07:56,898 INFO L882 garLoopResultBuilder]: For program point reach_errorFINAL(line 3) no Hoare annotation was computed. [2022-03-20 19:07:56,898 INFO L885 garLoopResultBuilder]: At program point correct_versionENTRY(lines 34 59) the Hoare annotation is: true [2022-03-20 19:07:56,898 INFO L885 garLoopResultBuilder]: At program point L52-2(lines 52 56) the Hoare annotation is: true [2022-03-20 19:07:56,898 INFO L885 garLoopResultBuilder]: At program point L52-3(lines 52 56) the Hoare annotation is: true [2022-03-20 19:07:56,898 INFO L885 garLoopResultBuilder]: At program point L44-1(lines 35 59) the Hoare annotation is: true [2022-03-20 19:07:56,898 INFO L885 garLoopResultBuilder]: At program point L44-2(lines 44 48) the Hoare annotation is: true [2022-03-20 19:07:56,899 INFO L885 garLoopResultBuilder]: At program point correct_versionEXIT(lines 34 59) the Hoare annotation is: true [2022-03-20 19:07:56,899 INFO L885 garLoopResultBuilder]: At program point L38-2(lines 38 42) the Hoare annotation is: true [2022-03-20 19:07:56,899 INFO L885 garLoopResultBuilder]: At program point correct_versionFINAL(lines 34 59) the Hoare annotation is: true [2022-03-20 19:07:56,899 INFO L878 garLoopResultBuilder]: At program point L97(lines 97 106) the Hoare annotation is: (and (<= main_~n_stones2~0 2147483647) (= main_~n_stones2~0 main_~n_stones1~0) (<= 0 (+ main_~n_stones2~0 2147483648))) [2022-03-20 19:07:56,899 INFO L878 garLoopResultBuilder]: At program point L97-2(lines 97 106) the Hoare annotation is: (or (and (<= main_~n_stones2~0 2147483647) (<= 1 main_~n~0) (<= 0 (+ main_~n_stones2~0 2147483648))) (= main_~n_stones2~0 main_~n_stones1~0)) [2022-03-20 19:07:56,899 INFO L885 garLoopResultBuilder]: At program point mainENTRY(lines 88 109) the Hoare annotation is: true [2022-03-20 19:07:56,899 INFO L885 garLoopResultBuilder]: At program point mainEXIT(lines 88 109) the Hoare annotation is: true [2022-03-20 19:07:56,899 INFO L885 garLoopResultBuilder]: At program point mainFINAL(lines 88 109) the Hoare annotation is: true [2022-03-20 19:07:56,900 INFO L885 garLoopResultBuilder]: At program point L107(line 107) the Hoare annotation is: true [2022-03-20 19:07:56,900 INFO L878 garLoopResultBuilder]: At program point L105(line 105) the Hoare annotation is: (and (<= main_~n_stones2~0 2147483647) (<= 1 main_~n~0) (<= 0 (+ main_~n_stones2~0 2147483648))) [2022-03-20 19:07:56,900 INFO L878 garLoopResultBuilder]: At program point L104(line 104) the Hoare annotation is: (and (<= main_~n_stones2~0 2147483647) (<= 1 main_~n~0) (= main_~n_stones2~0 main_~n_stones1~0) (<= 0 (+ main_~n_stones2~0 2147483648))) [2022-03-20 19:07:56,900 INFO L878 garLoopResultBuilder]: At program point L105-1(line 105) the Hoare annotation is: (or (and (<= main_~n_stones2~0 2147483647) (<= 1 main_~n~0) (<= 0 (+ main_~n_stones2~0 2147483648))) (and (= main_~n_stones1~0 |main_#t~ret9|) (= main_~n_stones1~0 0))) [2022-03-20 19:07:56,900 INFO L878 garLoopResultBuilder]: At program point L104-1(line 104) the Hoare annotation is: (and (<= main_~n_stones2~0 2147483647) (<= 1 main_~n~0) (= main_~n_stones2~0 main_~n_stones1~0) (<= 0 (+ main_~n_stones2~0 2147483648))) [2022-03-20 19:07:56,900 INFO L878 garLoopResultBuilder]: At program point L79-2(lines 79 83) the Hoare annotation is: (or (< student_version_~x~1 (+ student_version_~i~1 1)) (and (<= 0 student_version_~y~1) (<= student_version_~y~1 0))) [2022-03-20 19:07:56,900 INFO L878 garLoopResultBuilder]: At program point L79-3(lines 79 83) the Hoare annotation is: (or (< student_version_~x~1 (+ student_version_~i~1 1)) (and (<= 0 student_version_~y~1) (<= student_version_~y~1 0))) [2022-03-20 19:07:56,900 INFO L885 garLoopResultBuilder]: At program point student_versionENTRY(lines 61 86) the Hoare annotation is: true [2022-03-20 19:07:56,900 INFO L885 garLoopResultBuilder]: At program point L71-1(lines 62 86) the Hoare annotation is: true [2022-03-20 19:07:56,901 INFO L885 garLoopResultBuilder]: At program point L71-2(lines 71 75) the Hoare annotation is: true [2022-03-20 19:07:56,901 INFO L878 garLoopResultBuilder]: At program point student_versionEXIT(lines 61 86) the Hoare annotation is: (or (and (<= 0 student_version_~y~1) (= |student_version_#res| 0) (<= student_version_~y~1 0)) (< student_version_~x~1 (+ student_version_~i~1 1))) [2022-03-20 19:07:56,901 INFO L885 garLoopResultBuilder]: At program point L65-2(lines 65 69) the Hoare annotation is: true [2022-03-20 19:07:56,901 INFO L878 garLoopResultBuilder]: At program point student_versionFINAL(lines 61 86) the Hoare annotation is: (or (and (<= 0 student_version_~y~1) (= |student_version_#res| 0) (<= student_version_~y~1 0)) (< student_version_~x~1 (+ student_version_~i~1 1))) [2022-03-20 19:07:56,901 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2022-03-20 19:07:56,901 INFO L878 garLoopResultBuilder]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|)) [2022-03-20 19:07:56,901 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2022-03-20 19:07:56,901 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2022-03-20 19:07:56,901 INFO L885 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: true [2022-03-20 19:07:56,901 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2022-03-20 19:07:56,901 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2022-03-20 19:07:56,902 INFO L885 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 5 10) the Hoare annotation is: true [2022-03-20 19:07:56,902 INFO L878 garLoopResultBuilder]: At program point __VERIFIER_assertEXIT(lines 5 10) the Hoare annotation is: (not (= __VERIFIER_assert_~cond 0)) [2022-03-20 19:07:56,902 INFO L878 garLoopResultBuilder]: At program point L7(line 7) the Hoare annotation is: (and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0)) [2022-03-20 19:07:56,902 INFO L878 garLoopResultBuilder]: At program point L6(lines 6 8) the Hoare annotation is: (and (or (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (forall ((v_main_~n_stones2~0_5 Int) (v_main_~n_stones1~0_6 Int)) (or (let ((.cse0 (= v_main_~n_stones1~0_6 v_main_~n_stones2~0_5))) (and (or (not (= |__VERIFIER_assert_#in~cond| 0)) .cse0) (or (not .cse0) (not (= |__VERIFIER_assert_#in~cond| 1))))) (not (<= 0 (+ v_main_~n_stones2~0_5 2147483648))) (not (<= v_main_~n_stones2~0_5 2147483647))))) (or (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0)))) [2022-03-20 19:07:56,902 INFO L878 garLoopResultBuilder]: At program point L6-2(lines 5 10) the Hoare annotation is: (not (= __VERIFIER_assert_~cond 0)) [2022-03-20 19:07:56,902 INFO L878 garLoopResultBuilder]: At program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 7) the Hoare annotation is: false [2022-03-20 19:07:56,905 INFO L719 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1] [2022-03-20 19:07:56,906 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-20 19:07:56,918 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.03 07:07:56 BoogieIcfgContainer [2022-03-20 19:07:56,918 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-20 19:07:56,919 INFO L158 Benchmark]: Toolchain (without parser) took 27107.29ms. Allocated memory was 182.5MB in the beginning and 226.5MB in the end (delta: 44.0MB). Free memory was 133.8MB in the beginning and 186.8MB in the end (delta: -53.0MB). There was no memory consumed. Max. memory is 8.0GB. [2022-03-20 19:07:56,919 INFO L158 Benchmark]: CDTParser took 0.23ms. Allocated memory is still 182.5MB. Free memory is still 150.0MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-20 19:07:56,919 INFO L158 Benchmark]: CACSL2BoogieTranslator took 239.01ms. Allocated memory is still 182.5MB. Free memory was 133.5MB in the beginning and 160.5MB in the end (delta: -26.9MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-03-20 19:07:56,919 INFO L158 Benchmark]: Boogie Preprocessor took 24.48ms. Allocated memory is still 182.5MB. Free memory was 160.5MB in the beginning and 158.7MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-03-20 19:07:56,920 INFO L158 Benchmark]: RCFGBuilder took 304.60ms. Allocated memory is still 182.5MB. Free memory was 158.7MB in the beginning and 147.5MB in the end (delta: 11.2MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-03-20 19:07:56,920 INFO L158 Benchmark]: TraceAbstraction took 26533.96ms. Allocated memory was 182.5MB in the beginning and 226.5MB in the end (delta: 44.0MB). Free memory was 146.8MB in the beginning and 186.8MB in the end (delta: -39.9MB). Peak memory consumption was 5.1MB. Max. memory is 8.0GB. [2022-03-20 19:07:56,921 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23ms. Allocated memory is still 182.5MB. Free memory is still 150.0MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 239.01ms. Allocated memory is still 182.5MB. Free memory was 133.5MB in the beginning and 160.5MB in the end (delta: -26.9MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Preprocessor took 24.48ms. Allocated memory is still 182.5MB. Free memory was 160.5MB in the beginning and 158.7MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 304.60ms. Allocated memory is still 182.5MB. Free memory was 158.7MB in the beginning and 147.5MB in the end (delta: 11.2MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * TraceAbstraction took 26533.96ms. Allocated memory was 182.5MB in the beginning and 226.5MB in the end (delta: 44.0MB). Free memory was 146.8MB in the beginning and 186.8MB in the end (delta: -39.9MB). Peak memory consumption was 5.1MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 7]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 7 procedures, 42 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 26.5s, OverallIterations: 3, TraceHistogramMax: 1, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 0.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.2s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 141 SdHoareTripleChecker+Valid, 0.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 137 mSDsluCounter, 210 SdHoareTripleChecker+Invalid, 0.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 36 IncrementalHoareTripleChecker+Unchecked, 110 mSDsCounter, 47 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 646 IncrementalHoareTripleChecker+Invalid, 729 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 47 mSolverCounterUnsat, 100 mSDtfsCounter, 646 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 67 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=42occurred in iteration=2, InterpolantAutomatonStates: 32, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 2 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 39 LocationsWithAnnotation, 95 PreInvPairs, 164 NumberOfFragments, 237 HoareAnnotationTreeSize, 95 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 39 FomulaSimplificationsInter, 304 FormulaSimplificationTreeSizeReductionInter, 0.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 79]: Loop Invariant Derived loop invariant: x < i + 1 || (0 <= y && y <= 0) - InvariantResult [Line: 52]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 65]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 38]: Loop Invariant Derived loop invariant: 1 - ProcedureContractResult [Line: 34]: Procedure Contract for correct_version Derived contract for procedure correct_version: 1 - ProcedureContractResult [Line: 61]: Procedure Contract for student_version Derived contract for procedure student_version: ((0 <= y && \result == 0) && y <= 0) || x < i + 1 - ProcedureContractResult [Line: 88]: Procedure Contract for main Derived contract for procedure main: 1 - ProcedureContractResult [Line: 5]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert: !(cond == 0) RESULT: Ultimate proved your program to be correct! [2022-03-20 19:07:56,938 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...