java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-INT.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem17_label00_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-1dbac8b [2018-10-27 14:53:11,682 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-27 14:53:11,684 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-27 14:53:11,697 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-27 14:53:11,697 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-27 14:53:11,698 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-27 14:53:11,700 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-27 14:53:11,702 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-27 14:53:11,704 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-27 14:53:11,704 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-27 14:53:11,705 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-27 14:53:11,706 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-27 14:53:11,707 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-27 14:53:11,708 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-27 14:53:11,709 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-27 14:53:11,710 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-27 14:53:11,711 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-27 14:53:11,713 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-27 14:53:11,715 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-27 14:53:11,717 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-27 14:53:11,718 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-27 14:53:11,719 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-27 14:53:11,722 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-27 14:53:11,722 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-27 14:53:11,722 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-27 14:53:11,723 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-27 14:53:11,724 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-27 14:53:11,725 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-27 14:53:11,726 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-27 14:53:11,727 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-27 14:53:11,727 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-27 14:53:11,728 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-10-27 14:53:11,728 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-27 14:53:11,729 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-27 14:53:11,730 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-27 14:53:11,730 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-27 14:53:11,731 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-INT.epf [2018-10-27 14:53:11,760 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-27 14:53:11,760 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-27 14:53:11,763 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-27 14:53:11,764 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-27 14:53:11,764 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-27 14:53:11,764 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-27 14:53:11,764 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-10-27 14:53:11,764 INFO L133 SettingsManager]: * Octagon Domain=false [2018-10-27 14:53:11,765 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-27 14:53:11,765 INFO L133 SettingsManager]: * Log string format=TERM [2018-10-27 14:53:11,765 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-10-27 14:53:11,765 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-27 14:53:11,767 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-27 14:53:11,767 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-27 14:53:11,767 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-27 14:53:11,767 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-27 14:53:11,768 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-27 14:53:11,768 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-27 14:53:11,768 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-27 14:53:11,768 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-27 14:53:11,769 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-27 14:53:11,769 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-27 14:53:11,769 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-27 14:53:11,769 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-27 14:53:11,769 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-27 14:53:11,769 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-27 14:53:11,770 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-27 14:53:11,770 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-27 14:53:11,770 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-10-27 14:53:11,770 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-27 14:53:11,770 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-27 14:53:11,770 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-27 14:53:11,770 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-27 14:53:11,771 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-10-27 14:53:11,828 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-27 14:53:11,841 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-27 14:53:11,845 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-27 14:53:11,847 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-27 14:53:11,848 INFO L276 PluginConnector]: CDTParser initialized [2018-10-27 14:53:11,848 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem17_label00_true-unreach-call.c [2018-10-27 14:53:11,909 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/72057e139/126cc734e36a45be8f1e2c10595087a7/FLAG0b750fe47 [2018-10-27 14:53:12,679 INFO L298 CDTParser]: Found 1 translation units. [2018-10-27 14:53:12,680 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem17_label00_true-unreach-call.c [2018-10-27 14:53:12,717 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/72057e139/126cc734e36a45be8f1e2c10595087a7/FLAG0b750fe47 [2018-10-27 14:53:12,739 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/72057e139/126cc734e36a45be8f1e2c10595087a7 [2018-10-27 14:53:12,752 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-27 14:53:12,756 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-27 14:53:12,757 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-27 14:53:12,757 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-27 14:53:12,763 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-27 14:53:12,764 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 02:53:12" (1/1) ... [2018-10-27 14:53:12,767 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b1086b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:53:12, skipping insertion in model container [2018-10-27 14:53:12,768 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 02:53:12" (1/1) ... [2018-10-27 14:53:12,781 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-27 14:53:12,919 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-27 14:53:13,912 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-27 14:53:13,917 INFO L189 MainTranslator]: Completed pre-run [2018-10-27 14:53:14,325 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-27 14:53:14,351 INFO L193 MainTranslator]: Completed translation [2018-10-27 14:53:14,351 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:53:14 WrapperNode [2018-10-27 14:53:14,352 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-27 14:53:14,353 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-27 14:53:14,353 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-27 14:53:14,353 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-27 14:53:14,365 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:53:14" (1/1) ... [2018-10-27 14:53:14,435 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:53:14" (1/1) ... [2018-10-27 14:53:14,865 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-27 14:53:14,865 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-27 14:53:14,865 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-27 14:53:14,866 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-27 14:53:14,877 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:53:14" (1/1) ... [2018-10-27 14:53:14,877 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:53:14" (1/1) ... [2018-10-27 14:53:14,906 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:53:14" (1/1) ... [2018-10-27 14:53:14,906 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:53:14" (1/1) ... [2018-10-27 14:53:15,025 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:53:14" (1/1) ... [2018-10-27 14:53:15,050 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:53:14" (1/1) ... [2018-10-27 14:53:15,084 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:53:14" (1/1) ... [2018-10-27 14:53:15,114 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-27 14:53:15,115 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-27 14:53:15,115 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-27 14:53:15,115 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-27 14:53:15,116 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:53:14" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-27 14:53:15,180 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-27 14:53:15,180 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-27 14:53:15,181 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2018-10-27 14:53:15,181 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2018-10-27 14:53:15,181 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-10-27 14:53:15,181 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-10-27 14:53:15,182 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-27 14:53:15,182 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-27 14:53:15,182 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-27 14:53:15,182 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-27 14:53:28,159 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-27 14:53:28,160 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 02:53:28 BoogieIcfgContainer [2018-10-27 14:53:28,160 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-27 14:53:28,162 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-27 14:53:28,162 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-27 14:53:28,166 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-27 14:53:28,166 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 02:53:12" (1/3) ... [2018-10-27 14:53:28,167 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c3b727b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 02:53:28, skipping insertion in model container [2018-10-27 14:53:28,167 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:53:14" (2/3) ... [2018-10-27 14:53:28,167 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c3b727b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 02:53:28, skipping insertion in model container [2018-10-27 14:53:28,168 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 02:53:28" (3/3) ... [2018-10-27 14:53:28,169 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem17_label00_true-unreach-call.c [2018-10-27 14:53:28,180 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-27 14:53:28,189 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-27 14:53:28,207 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-27 14:53:28,252 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-27 14:53:28,252 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-27 14:53:28,252 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-27 14:53:28,252 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-27 14:53:28,253 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-27 14:53:28,253 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-27 14:53:28,253 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-27 14:53:28,253 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-27 14:53:28,293 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states. [2018-10-27 14:53:28,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-10-27 14:53:28,303 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 14:53:28,304 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 14:53:28,306 INFO L424 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 14:53:28,313 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 14:53:28,313 INFO L82 PathProgramCache]: Analyzing trace with hash -1314477298, now seen corresponding path program 1 times [2018-10-27 14:53:28,316 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 14:53:28,366 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 14:53:28,366 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 14:53:28,366 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 14:53:28,366 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 14:53:28,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 14:53:28,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 14:53:28,847 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 14:53:28,847 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-27 14:53:28,848 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 14:53:28,855 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-27 14:53:28,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-27 14:53:28,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-27 14:53:28,874 INFO L87 Difference]: Start difference. First operand 604 states. Second operand 4 states. [2018-10-27 14:53:40,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 14:53:40,603 INFO L93 Difference]: Finished difference Result 2139 states and 3961 transitions. [2018-10-27 14:53:40,604 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-27 14:53:40,605 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 61 [2018-10-27 14:53:40,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 14:53:40,644 INFO L225 Difference]: With dead ends: 2139 [2018-10-27 14:53:40,644 INFO L226 Difference]: Without dead ends: 1529 [2018-10-27 14:53:40,654 INFO L605 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 [2018-10-27 14:53:40,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1529 states. [2018-10-27 14:53:40,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1529 to 1527. [2018-10-27 14:53:40,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1527 states. [2018-10-27 14:53:40,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1527 states to 1527 states and 2413 transitions. [2018-10-27 14:53:40,820 INFO L78 Accepts]: Start accepts. Automaton has 1527 states and 2413 transitions. Word has length 61 [2018-10-27 14:53:40,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 14:53:40,821 INFO L481 AbstractCegarLoop]: Abstraction has 1527 states and 2413 transitions. [2018-10-27 14:53:40,822 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-27 14:53:40,822 INFO L276 IsEmpty]: Start isEmpty. Operand 1527 states and 2413 transitions. [2018-10-27 14:53:40,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2018-10-27 14:53:40,830 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 14:53:40,830 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, 2, 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] [2018-10-27 14:53:40,831 INFO L424 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 14:53:40,831 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 14:53:40,831 INFO L82 PathProgramCache]: Analyzing trace with hash 1910289401, now seen corresponding path program 1 times [2018-10-27 14:53:40,831 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 14:53:40,833 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 14:53:40,833 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 14:53:40,833 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 14:53:40,833 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 14:53:40,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 14:53:41,379 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 14:53:41,380 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 14:53:41,380 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 14:53:41,381 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 137 with the following transitions: [2018-10-27 14:53:41,383 INFO L202 CegarAbsIntRunner]: [0], [1], [711], [718], [726], [734], [742], [750], [758], [766], [774], [782], [790], [798], [806], [814], [822], [830], [838], [846], [854], [862], [870], [878], [886], [894], [902], [910], [918], [926], [934], [942], [950], [958], [966], [974], [982], [990], [998], [1006], [1014], [1022], [1030], [1038], [1046], [1054], [1062], [1070], [1078], [1086], [1094], [1098], [1100], [1103], [1111], [1119], [1127], [1135], [1143], [1151], [1159], [1167], [1175], [1183], [1191], [1199], [1204], [1208], [1212], [1216], [1220], [1223], [2279], [2283], [2287], [2293], [2297], [2299], [2306], [2307], [2308], [2310], [2311] [2018-10-27 14:53:41,447 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-10-27 14:53:41,447 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 14:53:41,838 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-10-27 14:53:44,669 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-27 14:53:44,672 INFO L272 AbstractInterpreter]: Visited 83 different actions 467 times. Merged at 5 different actions 25 times. Widened at 1 different actions 1 times. Found 1 fixpoints after 1 different actions. Largest state had 26 variables. [2018-10-27 14:53:44,708 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 14:53:44,710 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-27 14:53:44,710 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 14:53:44,710 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-27 14:53:44,722 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 14:53:44,722 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-27 14:53:44,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 14:53:44,803 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 14:54:09,655 WARN L179 SmtUtils]: Spent 24.28 s on a formula simplification. DAG size of input: 135 DAG size of output: 98 [2018-10-27 14:54:09,817 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 4 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 14:54:09,818 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 14:54:10,091 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2018-10-27 14:54:16,338 WARN L179 SmtUtils]: Spent 2.04 s on a formula simplification. DAG size of input: 133 DAG size of output: 16 [2018-10-27 14:54:16,459 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 28 [2018-10-27 14:54:17,187 WARN L179 SmtUtils]: Spent 424.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 26 [2018-10-27 14:54:17,601 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 14:54:17,638 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-10-27 14:54:17,639 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 13 [2018-10-27 14:54:17,639 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 14:54:17,640 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-27 14:54:17,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-27 14:54:17,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=108, Unknown=2, NotChecked=0, Total=156 [2018-10-27 14:54:17,641 INFO L87 Difference]: Start difference. First operand 1527 states and 2413 transitions. Second operand 6 states. [2018-10-27 14:55:33,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 14:55:33,673 INFO L93 Difference]: Finished difference Result 5753 states and 9376 transitions. [2018-10-27 14:55:33,674 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-27 14:55:33,675 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 136 [2018-10-27 14:55:33,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 14:55:33,707 INFO L225 Difference]: With dead ends: 5753 [2018-10-27 14:55:33,708 INFO L226 Difference]: Without dead ends: 4232 [2018-10-27 14:55:33,719 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 267 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 32.1s TimeCoverageRelationStatistics Valid=46, Invalid=108, Unknown=2, NotChecked=0, Total=156 [2018-10-27 14:55:33,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4232 states. [2018-10-27 14:55:33,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4232 to 4203. [2018-10-27 14:55:33,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4203 states. [2018-10-27 14:55:33,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4203 states to 4203 states and 6451 transitions. [2018-10-27 14:55:33,873 INFO L78 Accepts]: Start accepts. Automaton has 4203 states and 6451 transitions. Word has length 136 [2018-10-27 14:55:33,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 14:55:33,875 INFO L481 AbstractCegarLoop]: Abstraction has 4203 states and 6451 transitions. [2018-10-27 14:55:33,875 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-27 14:55:33,875 INFO L276 IsEmpty]: Start isEmpty. Operand 4203 states and 6451 transitions. [2018-10-27 14:55:33,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2018-10-27 14:55:33,891 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 14:55:33,892 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, 2, 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] [2018-10-27 14:55:33,892 INFO L424 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 14:55:33,892 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 14:55:33,892 INFO L82 PathProgramCache]: Analyzing trace with hash 955245470, now seen corresponding path program 1 times [2018-10-27 14:55:33,893 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 14:55:33,896 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 14:55:33,896 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 14:55:33,896 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 14:55:33,896 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 14:55:33,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 14:55:34,218 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 14:55:34,218 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 14:55:34,218 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-10-27 14:55:34,218 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 14:55:34,219 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-27 14:55:34,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-27 14:55:34,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-10-27 14:55:34,220 INFO L87 Difference]: Start difference. First operand 4203 states and 6451 transitions. Second operand 6 states. [2018-10-27 14:55:40,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 14:55:40,835 INFO L93 Difference]: Finished difference Result 12534 states and 20253 transitions. [2018-10-27 14:55:40,835 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-27 14:55:40,835 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 177 [2018-10-27 14:55:40,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 14:55:40,900 INFO L225 Difference]: With dead ends: 12534 [2018-10-27 14:55:40,900 INFO L226 Difference]: Without dead ends: 8337 [2018-10-27 14:55:40,925 INFO L605 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 [2018-10-27 14:55:40,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8337 states. [2018-10-27 14:55:41,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8337 to 8283. [2018-10-27 14:55:41,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8283 states. [2018-10-27 14:55:41,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8283 states to 8283 states and 12265 transitions. [2018-10-27 14:55:41,195 INFO L78 Accepts]: Start accepts. Automaton has 8283 states and 12265 transitions. Word has length 177 [2018-10-27 14:55:41,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 14:55:41,196 INFO L481 AbstractCegarLoop]: Abstraction has 8283 states and 12265 transitions. [2018-10-27 14:55:41,196 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-27 14:55:41,196 INFO L276 IsEmpty]: Start isEmpty. Operand 8283 states and 12265 transitions. [2018-10-27 14:55:41,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2018-10-27 14:55:41,202 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 14:55:41,203 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 14:55:41,203 INFO L424 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 14:55:41,203 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 14:55:41,203 INFO L82 PathProgramCache]: Analyzing trace with hash 601384290, now seen corresponding path program 1 times [2018-10-27 14:55:41,204 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 14:55:41,204 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 14:55:41,204 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 14:55:41,205 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 14:55:41,205 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 14:55:41,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 14:55:41,651 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 14:55:41,651 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 14:55:41,652 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-10-27 14:55:41,652 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 14:55:41,652 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-27 14:55:41,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-27 14:55:41,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2018-10-27 14:55:41,653 INFO L87 Difference]: Start difference. First operand 8283 states and 12265 transitions. Second operand 7 states. [2018-10-27 14:56:04,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 14:56:04,792 INFO L93 Difference]: Finished difference Result 24782 states and 43285 transitions. [2018-10-27 14:56:04,792 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-27 14:56:04,792 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 195 [2018-10-27 14:56:04,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 14:56:04,975 INFO L225 Difference]: With dead ends: 24782 [2018-10-27 14:56:04,975 INFO L226 Difference]: Without dead ends: 16505 [2018-10-27 14:56:05,061 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2018-10-27 14:56:05,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16505 states. [2018-10-27 14:56:05,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16505 to 16243. [2018-10-27 14:56:05,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16243 states. [2018-10-27 14:56:05,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16243 states to 16243 states and 25934 transitions. [2018-10-27 14:56:05,646 INFO L78 Accepts]: Start accepts. Automaton has 16243 states and 25934 transitions. Word has length 195 [2018-10-27 14:56:05,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 14:56:05,646 INFO L481 AbstractCegarLoop]: Abstraction has 16243 states and 25934 transitions. [2018-10-27 14:56:05,647 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-27 14:56:05,647 INFO L276 IsEmpty]: Start isEmpty. Operand 16243 states and 25934 transitions. [2018-10-27 14:56:05,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2018-10-27 14:56:05,657 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 14:56:05,657 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 14:56:05,657 INFO L424 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 14:56:05,658 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 14:56:05,658 INFO L82 PathProgramCache]: Analyzing trace with hash -1927103323, now seen corresponding path program 1 times [2018-10-27 14:56:05,658 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 14:56:05,659 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 14:56:05,659 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 14:56:05,659 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 14:56:05,659 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 14:56:05,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 14:56:05,980 WARN L179 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-10-27 14:56:06,275 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 109 proven. 7 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2018-10-27 14:56:06,276 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 14:56:06,276 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 14:56:06,276 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 220 with the following transitions: [2018-10-27 14:56:06,277 INFO L202 CegarAbsIntRunner]: [0], [1], [711], [718], [726], [734], [742], [750], [758], [766], [774], [782], [790], [798], [806], [814], [822], [830], [838], [846], [854], [862], [870], [878], [886], [894], [902], [910], [918], [926], [934], [942], [950], [958], [966], [974], [982], [990], [998], [1006], [1014], [1022], [1030], [1038], [1046], [1054], [1062], [1070], [1078], [1086], [1094], [1098], [1100], [1103], [1111], [1119], [1127], [1135], [1143], [1151], [1159], [1167], [1175], [1183], [1191], [1199], [1204], [1208], [1212], [1216], [1220], [1223], [1224], [1228], [1232], [1236], [1240], [1244], [1255], [1259], [1262], [2279], [2283], [2287], [2293], [2297], [2299], [2306], [2307], [2308], [2310], [2311] [2018-10-27 14:56:06,283 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-10-27 14:56:06,283 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 14:56:06,368 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-10-27 14:56:08,551 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-27 14:56:08,551 INFO L272 AbstractInterpreter]: Visited 92 different actions 521 times. Merged at 5 different actions 25 times. Widened at 1 different actions 1 times. Found 1 fixpoints after 1 different actions. Largest state had 26 variables. [2018-10-27 14:56:08,588 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 14:56:08,589 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-27 14:56:08,589 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 14:56:08,589 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-27 14:56:08,602 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 14:56:08,602 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-27 14:56:08,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 14:56:08,688 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 14:56:09,122 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 181 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 14:56:09,122 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 14:56:09,277 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2018-10-27 14:56:09,715 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 181 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 14:56:09,736 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-27 14:56:09,736 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2018-10-27 14:56:09,736 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-27 14:56:09,737 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-27 14:56:09,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-27 14:56:09,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2018-10-27 14:56:09,739 INFO L87 Difference]: Start difference. First operand 16243 states and 25934 transitions. Second operand 9 states. [2018-10-27 14:56:19,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 14:56:19,209 INFO L93 Difference]: Finished difference Result 38312 states and 62450 transitions. [2018-10-27 14:56:19,210 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-27 14:56:19,210 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 219 [2018-10-27 14:56:19,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 14:56:19,332 INFO L225 Difference]: With dead ends: 38312 [2018-10-27 14:56:19,332 INFO L226 Difference]: Without dead ends: 22027 [2018-10-27 14:56:19,413 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 455 GetRequests, 436 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2018-10-27 14:56:19,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22027 states. [2018-10-27 14:56:19,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22027 to 21965. [2018-10-27 14:56:19,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21965 states. [2018-10-27 14:56:19,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21965 states to 21965 states and 29566 transitions. [2018-10-27 14:56:19,989 INFO L78 Accepts]: Start accepts. Automaton has 21965 states and 29566 transitions. Word has length 219 [2018-10-27 14:56:19,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 14:56:19,989 INFO L481 AbstractCegarLoop]: Abstraction has 21965 states and 29566 transitions. [2018-10-27 14:56:19,990 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-27 14:56:19,991 INFO L276 IsEmpty]: Start isEmpty. Operand 21965 states and 29566 transitions. [2018-10-27 14:56:20,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2018-10-27 14:56:20,005 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 14:56:20,005 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 14:56:20,006 INFO L424 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 14:56:20,006 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 14:56:20,006 INFO L82 PathProgramCache]: Analyzing trace with hash -452146073, now seen corresponding path program 1 times [2018-10-27 14:56:20,006 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 14:56:20,007 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 14:56:20,007 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 14:56:20,007 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 14:56:20,007 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 14:56:20,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 14:56:20,322 WARN L179 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-10-27 14:56:21,110 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 126 proven. 62 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-10-27 14:56:21,110 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 14:56:21,110 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 14:56:21,111 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 237 with the following transitions: [2018-10-27 14:56:21,111 INFO L202 CegarAbsIntRunner]: [0], [1], [711], [718], [726], [734], [742], [750], [758], [766], [774], [782], [790], [798], [806], [814], [822], [830], [838], [846], [854], [862], [870], [878], [886], [894], [902], [910], [918], [926], [934], [942], [950], [958], [966], [974], [982], [990], [998], [1006], [1014], [1022], [1030], [1038], [1046], [1054], [1062], [1070], [1078], [1086], [1094], [1098], [1100], [1103], [1111], [1119], [1127], [1135], [1143], [1151], [1159], [1167], [1175], [1183], [1191], [1199], [1204], [1208], [1212], [1216], [1220], [1224], [1228], [1232], [1236], [1240], [1244], [1255], [1259], [1263], [1267], [1271], [1275], [1278], [1279], [1282], [2279], [2283], [2287], [2293], [2297], [2299], [2306], [2307], [2308], [2310], [2311] [2018-10-27 14:56:21,120 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-10-27 14:56:21,120 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 14:56:21,202 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-10-27 14:56:27,924 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-27 14:56:27,925 INFO L272 AbstractInterpreter]: Visited 97 different actions 378 times. Merged at 7 different actions 24 times. Never widened. Found 4 fixpoints after 2 different actions. Largest state had 26 variables. [2018-10-27 14:56:27,939 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 14:56:27,940 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-27 14:56:27,940 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 14:56:27,940 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-27 14:56:27,947 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 14:56:27,947 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-27 14:56:28,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 14:56:28,039 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 14:56:28,245 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 111 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2018-10-27 14:56:28,245 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 14:56:28,648 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 111 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2018-10-27 14:56:28,669 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-10-27 14:56:28,669 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [7] total 8 [2018-10-27 14:56:28,669 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 14:56:28,670 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-27 14:56:28,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-27 14:56:28,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-10-27 14:56:28,672 INFO L87 Difference]: Start difference. First operand 21965 states and 29566 transitions. Second operand 3 states. [2018-10-27 14:56:32,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 14:56:32,394 INFO L93 Difference]: Finished difference Result 43924 states and 59126 transitions. [2018-10-27 14:56:32,395 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-27 14:56:32,395 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 236 [2018-10-27 14:56:32,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 14:56:32,463 INFO L225 Difference]: With dead ends: 43924 [2018-10-27 14:56:32,463 INFO L226 Difference]: Without dead ends: 21965 [2018-10-27 14:56:32,536 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 483 GetRequests, 472 SyntacticMatches, 5 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-10-27 14:56:32,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21965 states. [2018-10-27 14:56:32,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21965 to 21965. [2018-10-27 14:56:32,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21965 states. [2018-10-27 14:56:32,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21965 states to 21965 states and 28211 transitions. [2018-10-27 14:56:32,980 INFO L78 Accepts]: Start accepts. Automaton has 21965 states and 28211 transitions. Word has length 236 [2018-10-27 14:56:32,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 14:56:32,980 INFO L481 AbstractCegarLoop]: Abstraction has 21965 states and 28211 transitions. [2018-10-27 14:56:32,981 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-27 14:56:32,981 INFO L276 IsEmpty]: Start isEmpty. Operand 21965 states and 28211 transitions. [2018-10-27 14:56:32,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2018-10-27 14:56:32,996 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 14:56:32,997 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 14:56:32,997 INFO L424 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 14:56:32,997 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 14:56:32,997 INFO L82 PathProgramCache]: Analyzing trace with hash -684610887, now seen corresponding path program 1 times [2018-10-27 14:56:32,997 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 14:56:32,998 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 14:56:32,998 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 14:56:32,998 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 14:56:32,999 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 14:56:33,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 14:56:33,266 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 111 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2018-10-27 14:56:33,267 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 14:56:33,267 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-27 14:56:33,267 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 14:56:33,267 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-27 14:56:33,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-27 14:56:33,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-27 14:56:33,268 INFO L87 Difference]: Start difference. First operand 21965 states and 28211 transitions. Second operand 3 states. [2018-10-27 14:56:43,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 14:56:43,409 INFO L93 Difference]: Finished difference Result 61917 states and 81466 transitions. [2018-10-27 14:56:43,410 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-27 14:56:43,410 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 270 [2018-10-27 14:56:43,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 14:56:43,559 INFO L225 Difference]: With dead ends: 61917 [2018-10-27 14:56:43,559 INFO L226 Difference]: Without dead ends: 39958 [2018-10-27 14:56:43,622 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-27 14:56:43,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39958 states. [2018-10-27 14:56:44,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39958 to 39947. [2018-10-27 14:56:44,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39947 states. [2018-10-27 14:56:44,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39947 states to 39947 states and 51279 transitions. [2018-10-27 14:56:44,354 INFO L78 Accepts]: Start accepts. Automaton has 39947 states and 51279 transitions. Word has length 270 [2018-10-27 14:56:44,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 14:56:44,355 INFO L481 AbstractCegarLoop]: Abstraction has 39947 states and 51279 transitions. [2018-10-27 14:56:44,355 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-27 14:56:44,355 INFO L276 IsEmpty]: Start isEmpty. Operand 39947 states and 51279 transitions. [2018-10-27 14:56:44,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 336 [2018-10-27 14:56:44,379 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 14:56:44,380 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 14:56:44,380 INFO L424 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 14:56:44,381 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 14:56:44,381 INFO L82 PathProgramCache]: Analyzing trace with hash -583101172, now seen corresponding path program 1 times [2018-10-27 14:56:44,381 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 14:56:44,382 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 14:56:44,382 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 14:56:44,382 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 14:56:44,382 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 14:56:44,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 14:56:45,230 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 113 proven. 2 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2018-10-27 14:56:45,231 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 14:56:45,231 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 14:56:45,231 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 336 with the following transitions: [2018-10-27 14:56:45,232 INFO L202 CegarAbsIntRunner]: [0], [1], [711], [718], [726], [734], [742], [750], [758], [766], [774], [782], [790], [798], [806], [814], [822], [830], [838], [846], [854], [862], [870], [878], [886], [894], [902], [910], [918], [926], [934], [942], [950], [958], [966], [974], [982], [990], [998], [1006], [1014], [1022], [1030], [1038], [1046], [1054], [1062], [1070], [1078], [1086], [1094], [1098], [1100], [1103], [1111], [1119], [1127], [1135], [1143], [1151], [1159], [1167], [1175], [1183], [1191], [1199], [1204], [1208], [1212], [1216], [1220], [1224], [1228], [1232], [1236], [1240], [1244], [1255], [1259], [1263], [1267], [1271], [1275], [1279], [1282], [1283], [1287], [1291], [1295], [1299], [1303], [1307], [1318], [1322], [1326], [1330], [1334], [1345], [1349], [1353], [1357], [1361], [1365], [1369], [1373], [1377], [1381], [1385], [1389], [1393], [1397], [1401], [1405], [1409], [1413], [1417], [1428], [1432], [1436], [1440], [1451], [1455], [1459], [1463], [1467], [1471], [1475], [1479], [1490], [1501], [1505], [1516], [1520], [1524], [1528], [1532], [1536], [1540], [1544], [1548], [1559], [1563], [1567], [1578], [1582], [1593], [1597], [1601], [1612], [1623], [1627], [1631], [1635], [1639], [1643], [1647], [1651], [1655], [1659], [1663], [1667], [1678], [1689], [1693], [1697], [1701], [1705], [1709], [1713], [1717], [1728], [1732], [1736], [1747], [1751], [1755], [1759], [1763], [1767], [1771], [1775], [1779], [1783], [1786], [2279], [2283], [2287], [2293], [2297], [2299], [2306], [2307], [2308], [2310], [2311] [2018-10-27 14:56:45,239 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-10-27 14:56:45,239 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 14:56:45,309 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-10-27 14:56:47,884 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-27 14:56:47,884 INFO L272 AbstractInterpreter]: Visited 195 different actions 770 times. Merged at 7 different actions 24 times. Never widened. Found 4 fixpoints after 2 different actions. Largest state had 26 variables. [2018-10-27 14:56:47,891 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 14:56:47,891 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-27 14:56:47,891 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 14:56:47,891 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-27 14:56:47,899 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 14:56:47,899 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-27 14:56:47,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 14:56:48,001 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 14:56:48,332 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 113 proven. 2 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2018-10-27 14:56:48,333 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 14:56:49,770 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 113 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 14:56:49,806 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-27 14:56:49,807 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8] total 14 [2018-10-27 14:56:49,807 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-27 14:56:49,809 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-27 14:56:49,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-27 14:56:49,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2018-10-27 14:56:49,809 INFO L87 Difference]: Start difference. First operand 39947 states and 51279 transitions. Second operand 9 states. [2018-10-27 14:57:09,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 14:57:09,730 INFO L93 Difference]: Finished difference Result 117715 states and 160528 transitions. [2018-10-27 14:57:09,730 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-27 14:57:09,730 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 335 [2018-10-27 14:57:09,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 14:57:10,072 INFO L225 Difference]: With dead ends: 117715 [2018-10-27 14:57:10,073 INFO L226 Difference]: Without dead ends: 74214 [2018-10-27 14:57:10,256 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 689 GetRequests, 664 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=179, Invalid=421, Unknown=0, NotChecked=0, Total=600 [2018-10-27 14:57:10,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74214 states. Received shutdown request... [2018-10-27 14:57:12,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74214 to 68538. [2018-10-27 14:57:12,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68538 states. [2018-10-27 14:57:12,129 WARN L550 AbstractCegarLoop]: Verification canceled [2018-10-27 14:57:12,136 WARN L205 ceAbstractionStarter]: Timeout [2018-10-27 14:57:12,136 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.10 02:57:12 BoogieIcfgContainer [2018-10-27 14:57:12,137 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-27 14:57:12,137 INFO L168 Benchmark]: Toolchain (without parser) took 239383.19 ms. Allocated memory was 1.5 GB in the beginning and 4.0 GB in the end (delta: 2.5 GB). Free memory was 1.4 GB in the beginning and 3.5 GB in the end (delta: -2.1 GB). Peak memory consumption was 2.5 GB. Max. memory is 7.1 GB. [2018-10-27 14:57:12,139 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. [2018-10-27 14:57:12,139 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1594.93 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 126.8 MB). Peak memory consumption was 126.8 MB. Max. memory is 7.1 GB. [2018-10-27 14:57:12,141 INFO L168 Benchmark]: Boogie Procedure Inliner took 512.43 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 773.8 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -924.1 MB). Peak memory consumption was 56.1 MB. Max. memory is 7.1 GB. [2018-10-27 14:57:12,142 INFO L168 Benchmark]: Boogie Preprocessor took 249.45 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.2 GB in the end (delta: 43.3 MB). Peak memory consumption was 43.3 MB. Max. memory is 7.1 GB. [2018-10-27 14:57:12,143 INFO L168 Benchmark]: RCFGBuilder took 13045.76 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 1.7 GB in the end (delta: 448.9 MB). Peak memory consumption was 448.9 MB. Max. memory is 7.1 GB. [2018-10-27 14:57:12,144 INFO L168 Benchmark]: TraceAbstraction took 223974.62 ms. Allocated memory was 2.3 GB in the beginning and 4.0 GB in the end (delta: 1.7 GB). Free memory was 1.7 GB in the beginning and 3.5 GB in the end (delta: -1.8 GB). Peak memory consumption was 2.0 GB. Max. memory is 7.1 GB. [2018-10-27 14:57:12,152 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 1594.93 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 126.8 MB). Peak memory consumption was 126.8 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 512.43 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 773.8 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -924.1 MB). Peak memory consumption was 56.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 249.45 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.2 GB in the end (delta: 43.3 MB). Peak memory consumption was 43.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 13045.76 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 1.7 GB in the end (delta: 448.9 MB). Peak memory consumption was 448.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 223974.62 ms. Allocated memory was 2.3 GB in the beginning and 4.0 GB in the end (delta: 1.7 GB). Free memory was 1.7 GB in the beginning and 3.5 GB in the end (delta: -1.8 GB). Peak memory consumption was 2.0 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 170]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 170). Cancelled while ReachableStatesComputation was computing reachable states (1 states constructedinput type DoubleDeckerAutomaton). - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 604 locations, 1 error locations. TIMEOUT Result, 223.8s OverallTime, 8 OverallIterations, 3 TraceHistogramMax, 162.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 2782 SDtfs, 16088 SDslu, 2511 SDs, 0 SdLazy, 29500 SolverSat, 7589 SolverUnsat, 24 SolverUnknown, 0 SolverNotchecked, 149.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1939 GetRequests, 1851 SyntacticMatches, 14 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 35.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=39947occurred in iteration=7, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 15.1s AbstIntTime, 4 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 4.7s AutomataMinimizationTime, 8 MinimizatonAttempts, 420 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 39.6s InterpolantComputationTime, 2555 NumberOfCodeBlocks, 2555 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 3465 ConstructedInterpolants, 173 QuantifiedInterpolants, 3891102 SizeOfPredicates, 7 NumberOfNonLiveVariables, 1657 ConjunctsInSsa, 27 ConjunctsInUnsatCore, 16 InterpolantComputations, 7 PerfectInterpolantSequences, 1924/2188 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown