java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-EXP.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem11_label30_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-df4b876 [2018-11-07 08:30:22,665 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-07 08:30:22,667 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-07 08:30:22,679 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-07 08:30:22,679 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-07 08:30:22,681 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-07 08:30:22,682 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-07 08:30:22,684 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-07 08:30:22,685 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-07 08:30:22,686 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-07 08:30:22,687 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-07 08:30:22,687 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-07 08:30:22,688 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-07 08:30:22,689 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-07 08:30:22,690 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-07 08:30:22,691 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-07 08:30:22,692 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-07 08:30:22,694 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-07 08:30:22,696 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-07 08:30:22,698 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-07 08:30:22,699 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-07 08:30:22,700 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-07 08:30:22,703 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-07 08:30:22,703 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-07 08:30:22,703 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-07 08:30:22,704 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-07 08:30:22,705 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-07 08:30:22,706 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-07 08:30:22,709 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-07 08:30:22,711 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-07 08:30:22,711 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-07 08:30:22,712 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-07 08:30:22,712 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-07 08:30:22,712 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-07 08:30:22,715 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-07 08:30:22,715 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-07 08:30:22,716 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-EXP.epf [2018-11-07 08:30:22,748 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-07 08:30:22,749 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-07 08:30:22,750 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-07 08:30:22,750 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-07 08:30:22,750 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-07 08:30:22,750 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-07 08:30:22,751 INFO L133 SettingsManager]: * Explicit value domain=true [2018-11-07 08:30:22,751 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-07 08:30:22,751 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-07 08:30:22,751 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-07 08:30:22,751 INFO L133 SettingsManager]: * Log string format=TERM [2018-11-07 08:30:22,752 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-07 08:30:22,752 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-07 08:30:22,752 INFO L133 SettingsManager]: * Interval Domain=false [2018-11-07 08:30:22,753 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-07 08:30:22,754 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-07 08:30:22,754 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-07 08:30:22,754 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-07 08:30:22,754 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-07 08:30:22,754 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-07 08:30:22,754 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-07 08:30:22,756 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-07 08:30:22,757 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-07 08:30:22,757 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-07 08:30:22,757 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-07 08:30:22,757 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-07 08:30:22,757 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-07 08:30:22,758 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-07 08:30:22,758 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-07 08:30:22,758 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-07 08:30:22,758 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-07 08:30:22,758 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-07 08:30:22,758 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-07 08:30:22,759 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-07 08:30:22,759 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-11-07 08:30:22,759 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-11-07 08:30:22,824 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-07 08:30:22,841 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-07 08:30:22,846 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-07 08:30:22,847 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-07 08:30:22,848 INFO L276 PluginConnector]: CDTParser initialized [2018-11-07 08:30:22,848 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label30_true-unreach-call.c [2018-11-07 08:30:22,922 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/db3c8f55e/020dd7dce58e4470aaad8f9e04cc7e04/FLAG25705bd8c [2018-11-07 08:30:23,594 INFO L298 CDTParser]: Found 1 translation units. [2018-11-07 08:30:23,598 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem11_label30_true-unreach-call.c [2018-11-07 08:30:23,613 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/db3c8f55e/020dd7dce58e4470aaad8f9e04cc7e04/FLAG25705bd8c [2018-11-07 08:30:23,632 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/db3c8f55e/020dd7dce58e4470aaad8f9e04cc7e04 [2018-11-07 08:30:23,645 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-07 08:30:23,647 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-07 08:30:23,650 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-07 08:30:23,651 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-07 08:30:23,655 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-07 08:30:23,657 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 08:30:23" (1/1) ... [2018-11-07 08:30:23,660 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@19823fae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:30:23, skipping insertion in model container [2018-11-07 08:30:23,661 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 08:30:23" (1/1) ... [2018-11-07 08:30:23,672 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-07 08:30:23,768 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-07 08:30:24,436 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 08:30:24,441 INFO L189 MainTranslator]: Completed pre-run [2018-11-07 08:30:24,594 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 08:30:24,613 INFO L193 MainTranslator]: Completed translation [2018-11-07 08:30:24,614 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:30:24 WrapperNode [2018-11-07 08:30:24,614 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-07 08:30:24,615 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-07 08:30:24,615 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-07 08:30:24,615 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-07 08:30:24,627 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:30:24" (1/1) ... [2018-11-07 08:30:24,778 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:30:24" (1/1) ... [2018-11-07 08:30:24,795 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-07 08:30:24,796 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-07 08:30:24,796 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-07 08:30:24,796 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-07 08:30:24,813 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:30:24" (1/1) ... [2018-11-07 08:30:24,813 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:30:24" (1/1) ... [2018-11-07 08:30:24,822 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:30:24" (1/1) ... [2018-11-07 08:30:24,822 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:30:24" (1/1) ... [2018-11-07 08:30:24,889 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:30:24" (1/1) ... [2018-11-07 08:30:24,914 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:30:24" (1/1) ... [2018-11-07 08:30:24,930 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:30:24" (1/1) ... [2018-11-07 08:30:24,940 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-07 08:30:24,940 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-07 08:30:24,941 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-07 08:30:24,941 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-07 08:30:24,942 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:30:24" (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 [2018-11-07 08:30:25,012 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-11-07 08:30:25,013 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-07 08:30:25,013 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-07 08:30:25,015 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-11-07 08:30:25,015 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-11-07 08:30:25,016 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-07 08:30:25,016 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-07 08:30:25,016 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-07 08:30:25,016 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-07 08:30:29,516 INFO L276 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-07 08:30:29,517 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 08:30:29 BoogieIcfgContainer [2018-11-07 08:30:29,518 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-07 08:30:29,519 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-07 08:30:29,519 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-07 08:30:29,522 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-07 08:30:29,523 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 08:30:23" (1/3) ... [2018-11-07 08:30:29,524 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2caea684 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 08:30:29, skipping insertion in model container [2018-11-07 08:30:29,524 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:30:24" (2/3) ... [2018-11-07 08:30:29,525 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2caea684 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 08:30:29, skipping insertion in model container [2018-11-07 08:30:29,525 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 08:30:29" (3/3) ... [2018-11-07 08:30:29,527 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem11_label30_true-unreach-call.c [2018-11-07 08:30:29,537 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-07 08:30:29,546 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-07 08:30:29,562 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-07 08:30:29,602 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-07 08:30:29,602 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-07 08:30:29,602 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-07 08:30:29,602 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-07 08:30:29,603 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-07 08:30:29,603 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-07 08:30:29,603 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-07 08:30:29,603 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-07 08:30:29,634 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states. [2018-11-07 08:30:29,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-11-07 08:30:29,642 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 08:30:29,643 INFO L375 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] [2018-11-07 08:30:29,646 INFO L423 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 08:30:29,652 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 08:30:29,652 INFO L82 PathProgramCache]: Analyzing trace with hash 814847676, now seen corresponding path program 1 times [2018-11-07 08:30:29,654 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 08:30:29,704 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 08:30:29,704 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 08:30:29,705 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 08:30:29,705 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 08:30:29,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 08:30:30,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 08:30:30,128 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 08:30:30,128 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-07 08:30:30,129 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 08:30:30,134 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-07 08:30:30,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-07 08:30:30,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 08:30:30,151 INFO L87 Difference]: Start difference. First operand 293 states. Second operand 4 states. [2018-11-07 08:30:33,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 08:30:33,425 INFO L93 Difference]: Finished difference Result 1001 states and 1780 transitions. [2018-11-07 08:30:33,426 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-07 08:30:33,427 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 36 [2018-11-07 08:30:33,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 08:30:33,452 INFO L225 Difference]: With dead ends: 1001 [2018-11-07 08:30:33,452 INFO L226 Difference]: Without dead ends: 702 [2018-11-07 08:30:33,463 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 08:30:33,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 702 states. [2018-11-07 08:30:33,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 702 to 699. [2018-11-07 08:30:33,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 699 states. [2018-11-07 08:30:33,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 699 states to 699 states and 1082 transitions. [2018-11-07 08:30:33,569 INFO L78 Accepts]: Start accepts. Automaton has 699 states and 1082 transitions. Word has length 36 [2018-11-07 08:30:33,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 08:30:33,569 INFO L480 AbstractCegarLoop]: Abstraction has 699 states and 1082 transitions. [2018-11-07 08:30:33,570 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-07 08:30:33,570 INFO L276 IsEmpty]: Start isEmpty. Operand 699 states and 1082 transitions. [2018-11-07 08:30:33,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2018-11-07 08:30:33,579 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 08:30:33,579 INFO L375 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, 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] [2018-11-07 08:30:33,579 INFO L423 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 08:30:33,580 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 08:30:33,580 INFO L82 PathProgramCache]: Analyzing trace with hash -25993205, now seen corresponding path program 1 times [2018-11-07 08:30:33,580 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 08:30:33,581 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 08:30:33,582 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 08:30:33,582 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 08:30:33,582 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 08:30:33,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 08:30:33,934 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 08:30:33,935 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 08:30:33,935 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-07 08:30:33,935 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 08:30:33,937 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-07 08:30:33,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-07 08:30:33,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-11-07 08:30:33,938 INFO L87 Difference]: Start difference. First operand 699 states and 1082 transitions. Second operand 6 states. [2018-11-07 08:30:39,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 08:30:39,081 INFO L93 Difference]: Finished difference Result 2534 states and 4100 transitions. [2018-11-07 08:30:39,082 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-07 08:30:39,082 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 109 [2018-11-07 08:30:39,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 08:30:39,099 INFO L225 Difference]: With dead ends: 2534 [2018-11-07 08:30:39,099 INFO L226 Difference]: Without dead ends: 1841 [2018-11-07 08:30:39,106 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-11-07 08:30:39,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1841 states. [2018-11-07 08:30:39,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1841 to 1815. [2018-11-07 08:30:39,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1815 states. [2018-11-07 08:30:39,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1815 states to 1815 states and 2683 transitions. [2018-11-07 08:30:39,211 INFO L78 Accepts]: Start accepts. Automaton has 1815 states and 2683 transitions. Word has length 109 [2018-11-07 08:30:39,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 08:30:39,212 INFO L480 AbstractCegarLoop]: Abstraction has 1815 states and 2683 transitions. [2018-11-07 08:30:39,212 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-07 08:30:39,212 INFO L276 IsEmpty]: Start isEmpty. Operand 1815 states and 2683 transitions. [2018-11-07 08:30:39,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-11-07 08:30:39,215 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 08:30:39,216 INFO L375 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, 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] [2018-11-07 08:30:39,216 INFO L423 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 08:30:39,216 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 08:30:39,217 INFO L82 PathProgramCache]: Analyzing trace with hash -1434902368, now seen corresponding path program 1 times [2018-11-07 08:30:39,217 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 08:30:39,218 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 08:30:39,218 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 08:30:39,218 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 08:30:39,218 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 08:30:39,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 08:30:39,433 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 08:30:39,434 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 08:30:39,434 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-07 08:30:39,434 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 08:30:39,435 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-07 08:30:39,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-07 08:30:39,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 08:30:39,435 INFO L87 Difference]: Start difference. First operand 1815 states and 2683 transitions. Second operand 4 states. [2018-11-07 08:30:41,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 08:30:41,923 INFO L93 Difference]: Finished difference Result 4796 states and 7372 transitions. [2018-11-07 08:30:41,927 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-07 08:30:41,927 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 110 [2018-11-07 08:30:41,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 08:30:41,950 INFO L225 Difference]: With dead ends: 4796 [2018-11-07 08:30:41,950 INFO L226 Difference]: Without dead ends: 2987 [2018-11-07 08:30:41,962 INFO L604 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 [2018-11-07 08:30:41,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2987 states. [2018-11-07 08:30:42,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2987 to 2970. [2018-11-07 08:30:42,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2970 states. [2018-11-07 08:30:42,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2970 states to 2970 states and 4362 transitions. [2018-11-07 08:30:42,063 INFO L78 Accepts]: Start accepts. Automaton has 2970 states and 4362 transitions. Word has length 110 [2018-11-07 08:30:42,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 08:30:42,064 INFO L480 AbstractCegarLoop]: Abstraction has 2970 states and 4362 transitions. [2018-11-07 08:30:42,064 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-07 08:30:42,065 INFO L276 IsEmpty]: Start isEmpty. Operand 2970 states and 4362 transitions. [2018-11-07 08:30:42,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2018-11-07 08:30:42,070 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 08:30:42,071 INFO L375 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, 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] [2018-11-07 08:30:42,071 INFO L423 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 08:30:42,071 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 08:30:42,071 INFO L82 PathProgramCache]: Analyzing trace with hash 579016823, now seen corresponding path program 1 times [2018-11-07 08:30:42,071 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 08:30:42,072 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 08:30:42,073 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 08:30:42,073 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 08:30:42,073 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 08:30:42,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 08:30:42,308 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 08:30:42,309 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 08:30:42,309 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-07 08:30:42,309 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 08:30:42,309 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-07 08:30:42,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-07 08:30:42,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-11-07 08:30:42,310 INFO L87 Difference]: Start difference. First operand 2970 states and 4362 transitions. Second operand 6 states. [2018-11-07 08:30:45,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 08:30:45,862 INFO L93 Difference]: Finished difference Result 11406 states and 20957 transitions. [2018-11-07 08:30:45,865 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-07 08:30:45,865 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 135 [2018-11-07 08:30:45,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 08:30:45,961 INFO L225 Difference]: With dead ends: 11406 [2018-11-07 08:30:45,961 INFO L226 Difference]: Without dead ends: 8442 [2018-11-07 08:30:46,045 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2018-11-07 08:30:46,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8442 states. [2018-11-07 08:30:46,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8442 to 7646. [2018-11-07 08:30:46,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7646 states. [2018-11-07 08:30:46,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7646 states to 7646 states and 11154 transitions. [2018-11-07 08:30:46,402 INFO L78 Accepts]: Start accepts. Automaton has 7646 states and 11154 transitions. Word has length 135 [2018-11-07 08:30:46,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 08:30:46,403 INFO L480 AbstractCegarLoop]: Abstraction has 7646 states and 11154 transitions. [2018-11-07 08:30:46,403 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-07 08:30:46,403 INFO L276 IsEmpty]: Start isEmpty. Operand 7646 states and 11154 transitions. [2018-11-07 08:30:46,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2018-11-07 08:30:46,414 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 08:30:46,414 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2018-11-07 08:30:46,414 INFO L423 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 08:30:46,415 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 08:30:46,415 INFO L82 PathProgramCache]: Analyzing trace with hash -1556909905, now seen corresponding path program 1 times [2018-11-07 08:30:46,415 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 08:30:46,416 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 08:30:46,416 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 08:30:46,416 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 08:30:46,416 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 08:30:46,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 08:30:46,730 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 128 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 08:30:46,731 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 08:30:46,731 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 08:30:46,732 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 184 with the following transitions: [2018-11-07 08:30:46,734 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [189], [191], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [502], [503], [507], [511], [514], [1084], [1088], [1092], [1098], [1102], [1104], [1109], [1110], [1111], [1113], [1114] [2018-11-07 08:30:46,782 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-07 08:30:46,783 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 08:30:47,235 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 08:30:47,240 INFO L272 AbstractInterpreter]: Visited 80 different actions 80 times. Never merged. Never widened. Never found a fixpoint. Largest state had 28 variables. [2018-11-07 08:30:47,300 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 08:30:47,300 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 08:30:47,824 INFO L227 lantSequenceWeakener]: Weakened 174 states. On average, predicates are now at 73.35% of their original sizes. [2018-11-07 08:30:47,824 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 08:30:48,062 INFO L415 sIntCurrentIteration]: We unified 182 AI predicates to 182 [2018-11-07 08:30:48,063 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 08:30:48,064 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 08:30:48,064 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2018-11-07 08:30:48,064 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 08:30:48,065 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-07 08:30:48,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-07 08:30:48,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-11-07 08:30:48,066 INFO L87 Difference]: Start difference. First operand 7646 states and 11154 transitions. Second operand 6 states. [2018-11-07 08:31:40,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 08:31:40,561 INFO L93 Difference]: Finished difference Result 15478 states and 22521 transitions. [2018-11-07 08:31:40,561 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-07 08:31:40,561 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 183 [2018-11-07 08:31:40,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 08:31:40,617 INFO L225 Difference]: With dead ends: 15478 [2018-11-07 08:31:40,618 INFO L226 Difference]: Without dead ends: 7838 [2018-11-07 08:31:40,654 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 183 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-11-07 08:31:40,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7838 states. [2018-11-07 08:31:40,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7838 to 7836. [2018-11-07 08:31:40,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7836 states. [2018-11-07 08:31:40,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7836 states to 7836 states and 11355 transitions. [2018-11-07 08:31:40,907 INFO L78 Accepts]: Start accepts. Automaton has 7836 states and 11355 transitions. Word has length 183 [2018-11-07 08:31:40,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 08:31:40,908 INFO L480 AbstractCegarLoop]: Abstraction has 7836 states and 11355 transitions. [2018-11-07 08:31:40,908 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-07 08:31:40,908 INFO L276 IsEmpty]: Start isEmpty. Operand 7836 states and 11355 transitions. [2018-11-07 08:31:40,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2018-11-07 08:31:40,916 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 08:31:40,917 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2018-11-07 08:31:40,917 INFO L423 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 08:31:40,918 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 08:31:40,918 INFO L82 PathProgramCache]: Analyzing trace with hash -386225441, now seen corresponding path program 1 times [2018-11-07 08:31:40,918 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 08:31:40,919 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 08:31:40,919 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 08:31:40,919 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 08:31:40,920 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 08:31:40,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 08:31:41,462 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 128 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 08:31:41,463 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 08:31:41,463 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 08:31:41,463 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 241 with the following transitions: [2018-11-07 08:31:41,464 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [189], [191], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [502], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [626], [630], [634], [638], [642], [646], [650], [654], [658], [662], [666], [677], [688], [692], [696], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [762], [766], [769], [772], [776], [1084], [1088], [1092], [1098], [1102], [1104], [1109], [1110], [1111], [1113], [1114] [2018-11-07 08:31:41,475 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-07 08:31:41,475 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 08:31:41,815 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 08:31:41,816 INFO L272 AbstractInterpreter]: Visited 141 different actions 409 times. Merged at 5 different actions 9 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 28 variables. [2018-11-07 08:31:41,842 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 08:31:41,844 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 08:31:41,844 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 08:31:41,844 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 08:31:41,868 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 08:31:41,869 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 08:31:41,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 08:31:41,974 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 08:31:42,154 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 128 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 08:31:42,155 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 08:31:42,462 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 128 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 08:31:42,495 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 08:31:42,495 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2018-11-07 08:31:42,495 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 08:31:42,497 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-07 08:31:42,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-07 08:31:42,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2018-11-07 08:31:42,498 INFO L87 Difference]: Start difference. First operand 7836 states and 11355 transitions. Second operand 9 states. [2018-11-07 08:31:51,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 08:31:51,678 INFO L93 Difference]: Finished difference Result 21948 states and 42313 transitions. [2018-11-07 08:31:51,678 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-11-07 08:31:51,678 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 240 [2018-11-07 08:31:51,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 08:31:51,820 INFO L225 Difference]: With dead ends: 21948 [2018-11-07 08:31:51,820 INFO L226 Difference]: Without dead ends: 14308 [2018-11-07 08:31:52,052 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 506 GetRequests, 483 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=159, Invalid=347, Unknown=0, NotChecked=0, Total=506 [2018-11-07 08:31:52,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14308 states. [2018-11-07 08:31:52,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14308 to 14149. [2018-11-07 08:31:52,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14149 states. [2018-11-07 08:31:52,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14149 states to 14149 states and 24757 transitions. [2018-11-07 08:31:52,846 INFO L78 Accepts]: Start accepts. Automaton has 14149 states and 24757 transitions. Word has length 240 [2018-11-07 08:31:52,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 08:31:52,846 INFO L480 AbstractCegarLoop]: Abstraction has 14149 states and 24757 transitions. [2018-11-07 08:31:52,846 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-07 08:31:52,847 INFO L276 IsEmpty]: Start isEmpty. Operand 14149 states and 24757 transitions. [2018-11-07 08:31:52,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2018-11-07 08:31:52,860 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 08:31:52,860 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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] [2018-11-07 08:31:52,861 INFO L423 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 08:31:52,861 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 08:31:52,861 INFO L82 PathProgramCache]: Analyzing trace with hash -1046651030, now seen corresponding path program 1 times [2018-11-07 08:31:52,861 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 08:31:52,862 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 08:31:52,862 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 08:31:52,862 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 08:31:52,863 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 08:31:52,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 08:31:53,396 WARN L179 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-11-07 08:31:54,165 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 4 proven. 61 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2018-11-07 08:31:54,165 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 08:31:54,166 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 08:31:54,166 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 259 with the following transitions: [2018-11-07 08:31:54,166 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [189], [191], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [594], [595], [599], [603], [607], [611], [615], [626], [630], [634], [638], [642], [646], [650], [654], [658], [662], [666], [677], [688], [692], [696], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [750], [1084], [1088], [1092], [1098], [1102], [1104], [1109], [1110], [1111], [1113], [1114] [2018-11-07 08:31:54,176 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-07 08:31:54,177 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 08:31:54,838 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 08:31:54,838 INFO L272 AbstractInterpreter]: Visited 136 different actions 402 times. Merged at 7 different actions 18 times. Never widened. Found 3 fixpoints after 3 different actions. Largest state had 28 variables. [2018-11-07 08:31:54,865 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 08:31:54,865 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 08:31:54,865 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 08:31:54,865 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 08:31:54,886 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 08:31:54,886 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 08:31:54,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 08:31:54,998 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 08:31:56,027 WARN L179 SmtUtils]: Spent 335.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 20 [2018-11-07 08:31:56,699 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-11-07 08:31:57,085 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 59 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 08:31:57,085 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 08:31:57,290 WARN L179 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2018-11-07 08:31:57,455 WARN L179 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2018-11-07 08:31:58,805 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 59 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 08:31:58,825 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 08:31:58,826 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 20 [2018-11-07 08:31:58,826 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 08:31:58,827 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-11-07 08:31:58,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-11-07 08:31:58,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2018-11-07 08:31:58,830 INFO L87 Difference]: Start difference. First operand 14149 states and 24757 transitions. Second operand 15 states. [2018-11-07 08:32:00,117 WARN L179 SmtUtils]: Spent 474.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 24 [2018-11-07 08:32:03,220 WARN L179 SmtUtils]: Spent 662.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 30 [2018-11-07 08:32:04,714 WARN L179 SmtUtils]: Spent 451.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 30 [2018-11-07 08:32:05,535 WARN L179 SmtUtils]: Spent 476.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 31 [2018-11-07 08:32:07,520 WARN L179 SmtUtils]: Spent 500.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 24 [2018-11-07 08:32:10,016 WARN L179 SmtUtils]: Spent 433.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 23 [2018-11-07 08:32:11,261 WARN L179 SmtUtils]: Spent 481.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 25 [2018-11-07 08:32:13,554 WARN L179 SmtUtils]: Spent 627.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2018-11-07 08:32:16,569 WARN L179 SmtUtils]: Spent 539.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2018-11-07 08:32:18,630 WARN L179 SmtUtils]: Spent 510.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 32 [2018-11-07 08:32:27,791 WARN L179 SmtUtils]: Spent 391.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 27 [2018-11-07 08:32:29,327 WARN L179 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 25 [2018-11-07 08:32:31,385 WARN L179 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 28 [2018-11-07 08:32:35,442 WARN L179 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 30 [2018-11-07 08:32:49,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 08:32:49,049 INFO L93 Difference]: Finished difference Result 52883 states and 111731 transitions. [2018-11-07 08:32:49,049 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 145 states. [2018-11-07 08:32:49,049 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 258 [2018-11-07 08:32:49,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 08:32:49,354 INFO L225 Difference]: With dead ends: 52883 [2018-11-07 08:32:49,354 INFO L226 Difference]: Without dead ends: 38606 [2018-11-07 08:32:49,544 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 664 GetRequests, 509 SyntacticMatches, 1 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9312 ImplicationChecksByTransitivity, 15.0s TimeCoverageRelationStatistics Valid=2748, Invalid=21432, Unknown=0, NotChecked=0, Total=24180 [2018-11-07 08:32:49,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38606 states. [2018-11-07 08:32:51,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38606 to 38277. [2018-11-07 08:32:51,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38277 states. [2018-11-07 08:32:51,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38277 states to 38277 states and 68603 transitions. [2018-11-07 08:32:51,459 INFO L78 Accepts]: Start accepts. Automaton has 38277 states and 68603 transitions. Word has length 258 [2018-11-07 08:32:51,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 08:32:51,460 INFO L480 AbstractCegarLoop]: Abstraction has 38277 states and 68603 transitions. [2018-11-07 08:32:51,460 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-11-07 08:32:51,460 INFO L276 IsEmpty]: Start isEmpty. Operand 38277 states and 68603 transitions. [2018-11-07 08:32:51,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2018-11-07 08:32:51,474 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 08:32:51,474 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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] [2018-11-07 08:32:51,474 INFO L423 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 08:32:51,475 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 08:32:51,475 INFO L82 PathProgramCache]: Analyzing trace with hash 1681288795, now seen corresponding path program 1 times [2018-11-07 08:32:51,475 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 08:32:51,477 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 08:32:51,477 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 08:32:51,477 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 08:32:51,477 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 08:32:51,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 08:32:52,018 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 59 proven. 6 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2018-11-07 08:32:52,018 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 08:32:52,019 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 08:32:52,019 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 259 with the following transitions: [2018-11-07 08:32:52,019 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [189], [191], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [574], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [626], [630], [634], [638], [642], [646], [650], [654], [658], [662], [666], [677], [688], [692], [696], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [762], [766], [769], [772], [776], [1084], [1088], [1092], [1098], [1102], [1104], [1109], [1110], [1111], [1113], [1114] [2018-11-07 08:32:52,024 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-07 08:32:52,024 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 08:32:52,454 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 08:32:52,455 INFO L272 AbstractInterpreter]: Visited 141 different actions 558 times. Merged at 7 different actions 28 times. Never widened. Found 4 fixpoints after 2 different actions. Largest state had 28 variables. [2018-11-07 08:32:52,494 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 08:32:52,494 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 08:32:52,494 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 08:32:52,494 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 08:32:52,511 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 08:32:52,511 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 08:32:52,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 08:32:52,589 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 08:32:52,705 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 146 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 08:32:52,705 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 08:32:52,832 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 146 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 08:32:52,854 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 08:32:52,855 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5] total 13 [2018-11-07 08:32:52,855 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 08:32:52,856 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-07 08:32:52,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-07 08:32:52,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2018-11-07 08:32:52,856 INFO L87 Difference]: Start difference. First operand 38277 states and 68603 transitions. Second operand 11 states. [2018-11-07 08:32:59,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 08:32:59,891 INFO L93 Difference]: Finished difference Result 95232 states and 198246 transitions. [2018-11-07 08:32:59,891 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-07 08:32:59,892 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 258 [2018-11-07 08:32:59,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 08:33:00,446 INFO L225 Difference]: With dead ends: 95232 [2018-11-07 08:33:00,447 INFO L226 Difference]: Without dead ends: 55427 [2018-11-07 08:33:00,775 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 539 GetRequests, 518 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=102, Invalid=240, Unknown=0, NotChecked=0, Total=342 [2018-11-07 08:33:00,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55427 states. [2018-11-07 08:33:02,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55427 to 54196. [2018-11-07 08:33:02,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54196 states. [2018-11-07 08:33:03,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54196 states to 54196 states and 90254 transitions. [2018-11-07 08:33:03,180 INFO L78 Accepts]: Start accepts. Automaton has 54196 states and 90254 transitions. Word has length 258 [2018-11-07 08:33:03,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 08:33:03,181 INFO L480 AbstractCegarLoop]: Abstraction has 54196 states and 90254 transitions. [2018-11-07 08:33:03,181 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-07 08:33:03,181 INFO L276 IsEmpty]: Start isEmpty. Operand 54196 states and 90254 transitions. [2018-11-07 08:33:03,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2018-11-07 08:33:03,191 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 08:33:03,191 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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] [2018-11-07 08:33:03,192 INFO L423 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 08:33:03,192 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 08:33:03,192 INFO L82 PathProgramCache]: Analyzing trace with hash 48645367, now seen corresponding path program 1 times [2018-11-07 08:33:03,192 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 08:33:03,193 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 08:33:03,193 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 08:33:03,193 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 08:33:03,193 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 08:33:03,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 08:33:03,394 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2018-11-07 08:33:03,395 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 08:33:03,395 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-07 08:33:03,395 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 08:33:03,396 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-07 08:33:03,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-07 08:33:03,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-07 08:33:03,396 INFO L87 Difference]: Start difference. First operand 54196 states and 90254 transitions. Second operand 3 states. [2018-11-07 08:33:07,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 08:33:07,735 INFO L93 Difference]: Finished difference Result 119915 states and 203318 transitions. [2018-11-07 08:33:07,735 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-07 08:33:07,735 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 260 [2018-11-07 08:33:07,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 08:33:08,180 INFO L225 Difference]: With dead ends: 119915 [2018-11-07 08:33:08,180 INFO L226 Difference]: Without dead ends: 63608 [2018-11-07 08:33:08,503 INFO L604 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 [2018-11-07 08:33:08,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63608 states. [2018-11-07 08:33:10,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63608 to 63414. [2018-11-07 08:33:10,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63414 states. [2018-11-07 08:33:10,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63414 states to 63414 states and 103012 transitions. [2018-11-07 08:33:10,750 INFO L78 Accepts]: Start accepts. Automaton has 63414 states and 103012 transitions. Word has length 260 [2018-11-07 08:33:10,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 08:33:10,751 INFO L480 AbstractCegarLoop]: Abstraction has 63414 states and 103012 transitions. [2018-11-07 08:33:10,751 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-07 08:33:10,751 INFO L276 IsEmpty]: Start isEmpty. Operand 63414 states and 103012 transitions. [2018-11-07 08:33:10,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2018-11-07 08:33:10,762 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 08:33:10,762 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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] [2018-11-07 08:33:10,762 INFO L423 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 08:33:10,763 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 08:33:10,763 INFO L82 PathProgramCache]: Analyzing trace with hash -1408350140, now seen corresponding path program 1 times [2018-11-07 08:33:10,763 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 08:33:10,764 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 08:33:10,764 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 08:33:10,764 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 08:33:10,764 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 08:33:10,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 08:33:11,217 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 65 proven. 88 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 08:33:11,218 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 08:33:11,218 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 08:33:11,218 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 264 with the following transitions: [2018-11-07 08:33:11,218 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [189], [191], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [594], [595], [599], [603], [607], [611], [615], [626], [630], [634], [638], [642], [646], [650], [654], [658], [662], [666], [677], [688], [692], [696], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [762], [766], [769], [772], [776], [1084], [1088], [1092], [1098], [1102], [1104], [1109], [1110], [1111], [1113], [1114] [2018-11-07 08:33:11,223 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-07 08:33:11,223 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 08:33:11,582 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 08:33:11,583 INFO L272 AbstractInterpreter]: Visited 141 different actions 418 times. Merged at 7 different actions 18 times. Never widened. Found 3 fixpoints after 3 different actions. Largest state had 28 variables. [2018-11-07 08:33:11,619 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 08:33:11,619 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 08:33:11,619 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 08:33:11,619 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 08:33:11,636 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 08:33:11,637 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 08:33:11,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 08:33:11,726 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 08:33:12,304 WARN L179 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 10 [2018-11-07 08:33:12,365 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 151 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 08:33:12,366 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 08:33:13,510 WARN L179 SmtUtils]: Spent 1.10 s on a formula simplification that was a NOOP. DAG size: 27 [2018-11-07 08:33:13,732 WARN L179 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 37 [2018-11-07 08:33:14,365 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 59 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 08:33:14,385 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 08:33:14,385 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 21 [2018-11-07 08:33:14,386 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 08:33:14,386 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-11-07 08:33:14,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-11-07 08:33:14,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2018-11-07 08:33:14,387 INFO L87 Difference]: Start difference. First operand 63414 states and 103012 transitions. Second operand 16 states. [2018-11-07 08:33:19,810 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 14 [2018-11-07 08:33:29,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 08:33:29,835 INFO L93 Difference]: Finished difference Result 147883 states and 308669 transitions. [2018-11-07 08:33:29,836 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-11-07 08:33:29,836 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 263 [2018-11-07 08:33:29,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 08:33:31,161 INFO L225 Difference]: With dead ends: 147883 [2018-11-07 08:33:31,161 INFO L226 Difference]: Without dead ends: 84105 [2018-11-07 08:33:31,735 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 582 GetRequests, 517 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1211 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=909, Invalid=3381, Unknown=0, NotChecked=0, Total=4290 [2018-11-07 08:33:31,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84105 states. [2018-11-07 08:33:35,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84105 to 77540. [2018-11-07 08:33:35,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77540 states. [2018-11-07 08:33:42,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77540 states to 77540 states and 135635 transitions. [2018-11-07 08:33:42,651 INFO L78 Accepts]: Start accepts. Automaton has 77540 states and 135635 transitions. Word has length 263 [2018-11-07 08:33:42,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 08:33:42,652 INFO L480 AbstractCegarLoop]: Abstraction has 77540 states and 135635 transitions. [2018-11-07 08:33:42,652 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-11-07 08:33:42,652 INFO L276 IsEmpty]: Start isEmpty. Operand 77540 states and 135635 transitions. [2018-11-07 08:33:42,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2018-11-07 08:33:42,662 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 08:33:42,662 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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] [2018-11-07 08:33:42,663 INFO L423 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 08:33:42,663 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 08:33:42,664 INFO L82 PathProgramCache]: Analyzing trace with hash 290792217, now seen corresponding path program 1 times [2018-11-07 08:33:42,664 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 08:33:42,664 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 08:33:42,665 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 08:33:42,665 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 08:33:42,665 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 08:33:42,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 08:33:42,999 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-11-07 08:33:43,681 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 2 proven. 151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 08:33:43,681 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 08:33:43,681 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 08:33:43,681 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 280 with the following transitions: [2018-11-07 08:33:43,682 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [189], [191], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [594], [595], [599], [603], [607], [611], [615], [626], [630], [634], [638], [642], [646], [650], [654], [658], [662], [666], [677], [688], [692], [696], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [762], [766], [777], [781], [785], [789], [793], [797], [808], [812], [816], [820], [824], [828], [832], [843], [847], [851], [862], [866], [869], [1084], [1088], [1092], [1098], [1102], [1104], [1109], [1110], [1111], [1113], [1114] [2018-11-07 08:33:43,685 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-07 08:33:43,685 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 08:33:44,044 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 08:33:44,045 INFO L272 AbstractInterpreter]: Visited 157 different actions 468 times. Merged at 7 different actions 21 times. Never widened. Found 3 fixpoints after 2 different actions. Largest state had 28 variables. [2018-11-07 08:33:44,052 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 08:33:44,052 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 08:33:44,052 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 08:33:44,052 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 08:33:44,061 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 08:33:44,061 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 08:33:44,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 08:33:44,149 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 08:33:44,582 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 151 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 08:33:44,582 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 08:33:45,293 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 59 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 08:33:45,314 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 08:33:45,314 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 8, 8] total 26 [2018-11-07 08:33:45,314 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 08:33:45,315 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-11-07 08:33:45,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-11-07 08:33:45,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=553, Unknown=0, NotChecked=0, Total=650 [2018-11-07 08:33:45,316 INFO L87 Difference]: Start difference. First operand 77540 states and 135635 transitions. Second operand 21 states. [2018-11-07 08:33:56,391 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 41 Received shutdown request... [2018-11-07 08:33:58,453 WARN L187 SmtUtils]: Removed 2 from assertion stack [2018-11-07 08:33:58,453 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-11-07 08:33:58,454 WARN L549 AbstractCegarLoop]: Verification canceled [2018-11-07 08:33:58,458 WARN L205 ceAbstractionStarter]: Timeout [2018-11-07 08:33:58,458 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 08:33:58 BoogieIcfgContainer [2018-11-07 08:33:58,459 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-07 08:33:58,459 INFO L168 Benchmark]: Toolchain (without parser) took 214813.72 ms. Allocated memory was 1.5 GB in the beginning and 5.1 GB in the end (delta: 3.6 GB). Free memory was 1.4 GB in the beginning and 3.0 GB in the end (delta: -1.6 GB). Peak memory consumption was 2.0 GB. Max. memory is 7.1 GB. [2018-11-07 08:33:58,461 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-11-07 08:33:58,461 INFO L168 Benchmark]: CACSL2BoogieTranslator took 964.16 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 55.5 MB). Peak memory consumption was 55.5 MB. Max. memory is 7.1 GB. [2018-11-07 08:33:58,462 INFO L168 Benchmark]: Boogie Procedure Inliner took 180.44 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 760.2 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -869.6 MB). Peak memory consumption was 23.1 MB. Max. memory is 7.1 GB. [2018-11-07 08:33:58,463 INFO L168 Benchmark]: Boogie Preprocessor took 144.40 ms. Allocated memory is still 2.3 GB. Free memory is still 2.2 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-11-07 08:33:58,463 INFO L168 Benchmark]: RCFGBuilder took 4577.38 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.1 GB in the end (delta: 167.6 MB). Peak memory consumption was 167.6 MB. Max. memory is 7.1 GB. [2018-11-07 08:33:58,464 INFO L168 Benchmark]: TraceAbstraction took 208939.92 ms. Allocated memory was 2.3 GB in the beginning and 5.1 GB in the end (delta: 2.8 GB). Free memory was 2.1 GB in the beginning and 3.0 GB in the end (delta: -907.6 MB). Peak memory consumption was 1.9 GB. Max. memory is 7.1 GB. [2018-11-07 08:33:58,469 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 964.16 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 55.5 MB). Peak memory consumption was 55.5 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 180.44 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 760.2 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -869.6 MB). Peak memory consumption was 23.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 144.40 ms. Allocated memory is still 2.3 GB. Free memory is still 2.2 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 4577.38 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.1 GB in the end (delta: 167.6 MB). Peak memory consumption was 167.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 208939.92 ms. Allocated memory was 2.3 GB in the beginning and 5.1 GB in the end (delta: 2.8 GB). Free memory was 2.1 GB in the beginning and 3.0 GB in the end (delta: -907.6 MB). Peak memory consumption was 1.9 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 93]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 93). Cancelled while BasicCegarLoop was constructing difference of abstraction (77540states) and FLOYD_HOARE automaton (currently 71 states, 21 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 41. - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 293 locations, 1 error locations. TIMEOUT Result, 208.8s OverallTime, 11 OverallIterations, 3 TraceHistogramMax, 171.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 2610 SDtfs, 24242 SDslu, 5392 SDs, 0 SdLazy, 51939 SolverSat, 7416 SolverUnsat, 7 SolverUnknown, 0 SolverNotchecked, 111.5s Time, PredicateUnifierStatistics: 2 DeclaredPredicates, 3149 GetRequests, 2770 SyntacticMatches, 10 SemanticMatches, 368 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13037 ImplicationChecksByTransitivity, 24.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=77540occurred in iteration=10, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 2.8s AbstIntTime, 6 AbstIntIterations, 1 AbstIntStrong, 0.9973957452803608 AbsIntWeakeningRatio, 0.15384615384615385 AbsIntAvgWeakeningVarsNumRemoved, 18.060439560439562 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 19.1s AutomataMinimizationTime, 10 MinimizatonAttempts, 9322 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 12.5s InterpolantComputationTime, 3429 NumberOfCodeBlocks, 3429 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 4706 ConstructedInterpolants, 7 QuantifiedInterpolants, 9612511 SizeOfPredicates, 10 NumberOfNonLiveVariables, 2334 ConjunctsInSsa, 50 ConjunctsInUnsatCore, 21 InterpolantComputations, 5 PerfectInterpolantSequences, 1880/2578 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown