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-EXP.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem17_label43_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-1dbac8b [2018-10-27 08:35:48,306 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-27 08:35:48,308 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-27 08:35:48,324 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-27 08:35:48,324 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-27 08:35:48,325 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-27 08:35:48,327 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-27 08:35:48,328 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-27 08:35:48,330 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-27 08:35:48,331 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-27 08:35:48,332 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-27 08:35:48,332 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-27 08:35:48,333 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-27 08:35:48,334 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-27 08:35:48,335 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-27 08:35:48,337 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-27 08:35:48,338 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-27 08:35:48,342 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-27 08:35:48,344 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-27 08:35:48,348 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-27 08:35:48,352 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-27 08:35:48,353 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-27 08:35:48,358 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-27 08:35:48,359 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-27 08:35:48,359 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-27 08:35:48,360 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-27 08:35:48,365 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-27 08:35:48,366 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-27 08:35:48,368 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-27 08:35:48,372 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-27 08:35:48,372 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-27 08:35:48,373 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-10-27 08:35:48,373 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-27 08:35:48,373 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-27 08:35:48,376 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-27 08:35:48,377 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-27 08:35:48,377 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-EXP.epf [2018-10-27 08:35:48,408 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-27 08:35:48,408 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-27 08:35:48,409 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-27 08:35:48,409 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-27 08:35:48,409 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-27 08:35:48,409 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-27 08:35:48,409 INFO L133 SettingsManager]: * Explicit value domain=true [2018-10-27 08:35:48,414 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-10-27 08:35:48,414 INFO L133 SettingsManager]: * Octagon Domain=false [2018-10-27 08:35:48,414 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-27 08:35:48,414 INFO L133 SettingsManager]: * Log string format=TERM [2018-10-27 08:35:48,415 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-10-27 08:35:48,415 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-27 08:35:48,415 INFO L133 SettingsManager]: * Interval Domain=false [2018-10-27 08:35:48,416 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-27 08:35:48,416 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-27 08:35:48,416 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-27 08:35:48,416 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-27 08:35:48,416 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-27 08:35:48,417 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-27 08:35:48,417 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-27 08:35:48,417 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-27 08:35:48,417 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-27 08:35:48,417 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-27 08:35:48,418 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-27 08:35:48,420 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-27 08:35:48,420 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-27 08:35:48,420 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-27 08:35:48,420 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-27 08:35:48,420 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-27 08:35:48,421 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-10-27 08:35:48,421 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-27 08:35:48,421 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-27 08:35:48,421 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-27 08:35:48,421 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-27 08:35:48,422 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-10-27 08:35:48,488 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-27 08:35:48,501 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-27 08:35:48,505 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-27 08:35:48,507 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-27 08:35:48,507 INFO L276 PluginConnector]: CDTParser initialized [2018-10-27 08:35:48,508 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem17_label43_true-unreach-call.c [2018-10-27 08:35:48,581 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/a4632aa74/fe87baffe46f4516bd65f47ad8760f9a/FLAGc088dec84 [2018-10-27 08:35:49,254 INFO L298 CDTParser]: Found 1 translation units. [2018-10-27 08:35:49,256 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem17_label43_true-unreach-call.c [2018-10-27 08:35:49,284 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/a4632aa74/fe87baffe46f4516bd65f47ad8760f9a/FLAGc088dec84 [2018-10-27 08:35:49,304 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/a4632aa74/fe87baffe46f4516bd65f47ad8760f9a [2018-10-27 08:35:49,317 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-27 08:35:49,319 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-27 08:35:49,320 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-27 08:35:49,320 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-27 08:35:49,327 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-27 08:35:49,329 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 08:35:49" (1/1) ... [2018-10-27 08:35:49,333 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@570fd3ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:35:49, skipping insertion in model container [2018-10-27 08:35:49,333 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 08:35:49" (1/1) ... [2018-10-27 08:35:49,345 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-27 08:35:49,464 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-27 08:35:50,479 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-27 08:35:50,484 INFO L189 MainTranslator]: Completed pre-run [2018-10-27 08:35:50,879 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-27 08:35:50,902 INFO L193 MainTranslator]: Completed translation [2018-10-27 08:35:50,902 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:35:50 WrapperNode [2018-10-27 08:35:50,903 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-27 08:35:50,903 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-27 08:35:50,904 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-27 08:35:50,904 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-27 08:35:50,914 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:35:50" (1/1) ... [2018-10-27 08:35:50,983 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:35:50" (1/1) ... [2018-10-27 08:35:51,381 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-27 08:35:51,381 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-27 08:35:51,382 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-27 08:35:51,382 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-27 08:35:51,393 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:35:50" (1/1) ... [2018-10-27 08:35:51,393 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:35:50" (1/1) ... [2018-10-27 08:35:51,413 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:35:50" (1/1) ... [2018-10-27 08:35:51,414 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:35:50" (1/1) ... [2018-10-27 08:35:51,545 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:35:50" (1/1) ... [2018-10-27 08:35:51,567 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:35:50" (1/1) ... [2018-10-27 08:35:51,635 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:35:50" (1/1) ... [2018-10-27 08:35:51,711 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-27 08:35:51,712 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-27 08:35:51,712 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-27 08:35:51,712 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-27 08:35:51,713 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:35:50" (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 08:35:51,785 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-27 08:35:51,785 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-27 08:35:51,786 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2018-10-27 08:35:51,786 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2018-10-27 08:35:51,786 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-10-27 08:35:51,786 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-10-27 08:35:51,786 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-27 08:35:51,787 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-27 08:35:51,787 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-27 08:35:51,787 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-27 08:36:04,332 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-27 08:36:04,333 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 08:36:04 BoogieIcfgContainer [2018-10-27 08:36:04,333 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-27 08:36:04,334 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-27 08:36:04,335 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-27 08:36:04,338 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-27 08:36:04,338 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 08:35:49" (1/3) ... [2018-10-27 08:36:04,339 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7232ee7b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 08:36:04, skipping insertion in model container [2018-10-27 08:36:04,339 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:35:50" (2/3) ... [2018-10-27 08:36:04,340 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7232ee7b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 08:36:04, skipping insertion in model container [2018-10-27 08:36:04,340 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 08:36:04" (3/3) ... [2018-10-27 08:36:04,342 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem17_label43_true-unreach-call.c [2018-10-27 08:36:04,352 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-27 08:36:04,361 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-27 08:36:04,380 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-27 08:36:04,434 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-27 08:36:04,435 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-27 08:36:04,435 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-27 08:36:04,435 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-27 08:36:04,435 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-27 08:36:04,436 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-27 08:36:04,436 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-27 08:36:04,436 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-27 08:36:04,488 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states. [2018-10-27 08:36:04,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-10-27 08:36:04,498 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 08:36:04,500 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, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 08:36:04,502 INFO L424 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 08:36:04,508 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 08:36:04,508 INFO L82 PathProgramCache]: Analyzing trace with hash 1064773166, now seen corresponding path program 1 times [2018-10-27 08:36:04,510 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 08:36:04,560 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:36:04,560 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 08:36:04,561 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:36:04,561 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 08:36:04,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 08:36:05,144 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 6 DAG size of output: 3 [2018-10-27 08:36:05,172 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 08:36:05,174 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 08:36:05,175 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-27 08:36:05,175 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 08:36:05,182 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-27 08:36:05,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-27 08:36:05,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-27 08:36:05,202 INFO L87 Difference]: Start difference. First operand 604 states. Second operand 4 states. [2018-10-27 08:36:15,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 08:36:15,477 INFO L93 Difference]: Finished difference Result 2118 states and 3937 transitions. [2018-10-27 08:36:15,477 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-27 08:36:15,479 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 69 [2018-10-27 08:36:15,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 08:36:15,522 INFO L225 Difference]: With dead ends: 2118 [2018-10-27 08:36:15,522 INFO L226 Difference]: Without dead ends: 1508 [2018-10-27 08:36:15,540 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-27 08:36:15,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1508 states. [2018-10-27 08:36:15,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1508 to 1039. [2018-10-27 08:36:15,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1039 states. [2018-10-27 08:36:15,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1039 states to 1039 states and 1596 transitions. [2018-10-27 08:36:15,710 INFO L78 Accepts]: Start accepts. Automaton has 1039 states and 1596 transitions. Word has length 69 [2018-10-27 08:36:15,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 08:36:15,711 INFO L481 AbstractCegarLoop]: Abstraction has 1039 states and 1596 transitions. [2018-10-27 08:36:15,711 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-27 08:36:15,711 INFO L276 IsEmpty]: Start isEmpty. Operand 1039 states and 1596 transitions. [2018-10-27 08:36:15,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2018-10-27 08:36:15,719 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 08:36:15,719 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, 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] [2018-10-27 08:36:15,720 INFO L424 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 08:36:15,720 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 08:36:15,720 INFO L82 PathProgramCache]: Analyzing trace with hash -213445479, now seen corresponding path program 1 times [2018-10-27 08:36:15,720 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 08:36:15,721 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:36:15,722 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 08:36:15,722 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:36:15,722 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 08:36:15,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 08:36:16,203 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 08:36:16,203 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 08:36:16,204 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 08:36:16,205 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 145 with the following transitions: [2018-10-27 08:36:16,207 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], [1102], [1110], [1118], [1126], [1134], [1142], [1150], [1158], [1162], [1164], [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 08:36:16,267 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-27 08:36:16,267 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 08:36:17,409 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-27 08:36:17,411 INFO L272 AbstractInterpreter]: Visited 83 different actions 235 times. Merged at 5 different actions 9 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 26 variables. [2018-10-27 08:36:17,462 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 08:36:17,464 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-27 08:36:17,464 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 08:36:17,464 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 08:36:17,479 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 08:36:17,480 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-27 08:36:17,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 08:36:17,589 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 08:36:24,209 WARN L179 SmtUtils]: Spent 6.09 s on a formula simplification that was a NOOP. DAG size: 42 [2018-10-27 08:36:24,407 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 4 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 08:36:24,407 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 08:36:24,719 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2018-10-27 08:36:27,056 WARN L179 SmtUtils]: Spent 2.03 s on a formula simplification. DAG size of input: 39 DAG size of output: 13 [2018-10-27 08:36:27,598 WARN L179 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 22 [2018-10-27 08:36:28,001 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 08:36:28,032 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-10-27 08:36:28,033 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 13 [2018-10-27 08:36:28,033 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 08:36:28,034 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-27 08:36:28,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-27 08:36:28,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2018-10-27 08:36:28,035 INFO L87 Difference]: Start difference. First operand 1039 states and 1596 transitions. Second operand 6 states. [2018-10-27 08:36:54,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 08:36:54,435 INFO L93 Difference]: Finished difference Result 3453 states and 5550 transitions. [2018-10-27 08:36:54,438 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-27 08:36:54,438 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 144 [2018-10-27 08:36:54,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 08:36:54,460 INFO L225 Difference]: With dead ends: 3453 [2018-10-27 08:36:54,460 INFO L226 Difference]: Without dead ends: 2420 [2018-10-27 08:36:54,466 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 283 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2018-10-27 08:36:54,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2420 states. [2018-10-27 08:36:54,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2420 to 2412. [2018-10-27 08:36:54,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2412 states. [2018-10-27 08:36:54,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2412 states to 2412 states and 3754 transitions. [2018-10-27 08:36:54,550 INFO L78 Accepts]: Start accepts. Automaton has 2412 states and 3754 transitions. Word has length 144 [2018-10-27 08:36:54,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 08:36:54,550 INFO L481 AbstractCegarLoop]: Abstraction has 2412 states and 3754 transitions. [2018-10-27 08:36:54,551 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-27 08:36:54,551 INFO L276 IsEmpty]: Start isEmpty. Operand 2412 states and 3754 transitions. [2018-10-27 08:36:54,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2018-10-27 08:36:54,569 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 08:36:54,569 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, 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] [2018-10-27 08:36:54,569 INFO L424 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 08:36:54,570 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 08:36:54,570 INFO L82 PathProgramCache]: Analyzing trace with hash -1594999713, now seen corresponding path program 1 times [2018-10-27 08:36:54,570 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 08:36:54,571 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:36:54,571 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 08:36:54,571 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:36:54,571 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 08:36:54,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 08:36:54,904 WARN L179 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-10-27 08:36:54,969 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 56 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 08:36:54,970 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 08:36:54,970 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 08:36:54,970 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 158 with the following transitions: [2018-10-27 08:36:54,971 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], [1102], [1110], [1118], [1126], [1134], [1142], [1150], [1158], [1162], [1164], [1167], [1175], [1183], [1191], [1199], [1204], [1208], [1212], [1216], [1220], [1224], [1228], [1232], [1236], [1240], [1244], [1255], [1259], [1263], [1267], [1271], [1275], [1279], [1282], [2279], [2283], [2287], [2293], [2297], [2299], [2306], [2307], [2308], [2310], [2311] [2018-10-27 08:36:54,976 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-27 08:36:54,976 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 08:36:55,260 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-27 08:36:55,261 INFO L272 AbstractInterpreter]: Visited 96 different actions 185 times. Merged at 5 different actions 5 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 26 variables. [2018-10-27 08:36:55,290 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 08:36:55,290 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-27 08:36:55,290 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 08:36:55,291 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 08:36:55,306 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 08:36:55,306 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-27 08:36:55,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 08:36:55,368 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 08:36:55,549 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 08:36:55,549 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 08:36:56,045 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 08:36:56,082 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-10-27 08:36:56,082 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [7] total 8 [2018-10-27 08:36:56,082 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 08:36:56,083 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-27 08:36:56,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-27 08:36:56,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-10-27 08:36:56,084 INFO L87 Difference]: Start difference. First operand 2412 states and 3754 transitions. Second operand 3 states. [2018-10-27 08:37:01,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 08:37:01,892 INFO L93 Difference]: Finished difference Result 6995 states and 11104 transitions. [2018-10-27 08:37:01,892 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-27 08:37:01,892 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 157 [2018-10-27 08:37:01,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 08:37:01,919 INFO L225 Difference]: With dead ends: 6995 [2018-10-27 08:37:01,920 INFO L226 Difference]: Without dead ends: 4589 [2018-10-27 08:37:01,933 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 313 SyntacticMatches, 4 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-10-27 08:37:01,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4589 states. [2018-10-27 08:37:02,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4589 to 4588. [2018-10-27 08:37:02,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4588 states. [2018-10-27 08:37:02,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4588 states to 4588 states and 7097 transitions. [2018-10-27 08:37:02,051 INFO L78 Accepts]: Start accepts. Automaton has 4588 states and 7097 transitions. Word has length 157 [2018-10-27 08:37:02,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 08:37:02,051 INFO L481 AbstractCegarLoop]: Abstraction has 4588 states and 7097 transitions. [2018-10-27 08:37:02,052 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-27 08:37:02,052 INFO L276 IsEmpty]: Start isEmpty. Operand 4588 states and 7097 transitions. [2018-10-27 08:37:02,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2018-10-27 08:37:02,058 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 08:37:02,058 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, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2018-10-27 08:37:02,058 INFO L424 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 08:37:02,059 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 08:37:02,059 INFO L82 PathProgramCache]: Analyzing trace with hash -963850834, now seen corresponding path program 1 times [2018-10-27 08:37:02,059 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 08:37:02,060 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:37:02,060 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 08:37:02,060 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:37:02,060 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 08:37:02,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 08:37:02,380 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 125 proven. 7 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2018-10-27 08:37:02,380 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 08:37:02,380 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 08:37:02,380 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 235 with the following transitions: [2018-10-27 08:37:02,381 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], [1102], [1110], [1118], [1126], [1134], [1142], [1150], [1158], [1162], [1164], [1167], [1175], [1183], [1191], [1199], [1204], [1208], [1212], [1216], [1220], [1223], [1224], [1228], [1232], [1236], [1240], [1244], [1255], [1259], [1263], [1267], [1271], [1275], [1279], [1283], [1287], [1290], [2279], [2283], [2287], [2293], [2297], [2299], [2306], [2307], [2308], [2310], [2311] [2018-10-27 08:37:02,385 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-27 08:37:02,385 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 08:37:02,910 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-27 08:37:02,911 INFO L272 AbstractInterpreter]: Visited 99 different actions 283 times. Merged at 5 different actions 9 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 26 variables. [2018-10-27 08:37:02,948 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 08:37:02,949 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-27 08:37:02,949 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 08:37:02,949 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 08:37:02,959 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 08:37:02,960 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-27 08:37:03,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 08:37:03,045 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 08:37:03,279 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 197 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 08:37:03,279 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 08:37:03,533 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2018-10-27 08:37:03,953 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 197 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 08:37:03,991 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-27 08:37:03,991 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2018-10-27 08:37:03,991 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-27 08:37:03,993 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-27 08:37:03,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-27 08:37:03,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2018-10-27 08:37:03,993 INFO L87 Difference]: Start difference. First operand 4588 states and 7097 transitions. Second operand 9 states. [2018-10-27 08:37:15,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 08:37:15,539 INFO L93 Difference]: Finished difference Result 11486 states and 17894 transitions. [2018-10-27 08:37:15,540 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-27 08:37:15,540 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 234 [2018-10-27 08:37:15,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 08:37:15,567 INFO L225 Difference]: With dead ends: 11486 [2018-10-27 08:37:15,568 INFO L226 Difference]: Without dead ends: 6418 [2018-10-27 08:37:15,583 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 485 GetRequests, 466 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2018-10-27 08:37:15,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6418 states. [2018-10-27 08:37:15,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6418 to 6406. [2018-10-27 08:37:15,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6406 states. [2018-10-27 08:37:15,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6406 states to 6406 states and 7901 transitions. [2018-10-27 08:37:15,777 INFO L78 Accepts]: Start accepts. Automaton has 6406 states and 7901 transitions. Word has length 234 [2018-10-27 08:37:15,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 08:37:15,778 INFO L481 AbstractCegarLoop]: Abstraction has 6406 states and 7901 transitions. [2018-10-27 08:37:15,778 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-27 08:37:15,778 INFO L276 IsEmpty]: Start isEmpty. Operand 6406 states and 7901 transitions. [2018-10-27 08:37:15,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2018-10-27 08:37:15,784 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 08:37:15,785 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 08:37:15,785 INFO L424 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 08:37:15,785 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 08:37:15,785 INFO L82 PathProgramCache]: Analyzing trace with hash -1177890901, now seen corresponding path program 1 times [2018-10-27 08:37:15,786 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 08:37:15,786 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:37:15,787 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 08:37:15,787 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:37:15,787 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 08:37:15,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 08:37:16,048 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 127 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2018-10-27 08:37:16,048 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 08:37:16,048 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-27 08:37:16,049 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 08:37:16,049 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-27 08:37:16,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-27 08:37:16,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-27 08:37:16,050 INFO L87 Difference]: Start difference. First operand 6406 states and 7901 transitions. Second operand 3 states. [2018-10-27 08:37:19,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 08:37:19,602 INFO L93 Difference]: Finished difference Result 17165 states and 21197 transitions. [2018-10-27 08:37:19,611 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-27 08:37:19,611 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 246 [2018-10-27 08:37:19,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 08:37:19,647 INFO L225 Difference]: With dead ends: 17165 [2018-10-27 08:37:19,647 INFO L226 Difference]: Without dead ends: 8928 [2018-10-27 08:37:19,673 INFO L605 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 [2018-10-27 08:37:19,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8928 states. [2018-10-27 08:37:19,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8928 to 8488. [2018-10-27 08:37:19,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8488 states. [2018-10-27 08:37:19,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8488 states to 8488 states and 10056 transitions. [2018-10-27 08:37:19,853 INFO L78 Accepts]: Start accepts. Automaton has 8488 states and 10056 transitions. Word has length 246 [2018-10-27 08:37:19,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 08:37:19,854 INFO L481 AbstractCegarLoop]: Abstraction has 8488 states and 10056 transitions. [2018-10-27 08:37:19,854 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-27 08:37:19,854 INFO L276 IsEmpty]: Start isEmpty. Operand 8488 states and 10056 transitions. [2018-10-27 08:37:19,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 318 [2018-10-27 08:37:19,861 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 08:37:19,862 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:37:19,862 INFO L424 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 08:37:19,862 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 08:37:19,862 INFO L82 PathProgramCache]: Analyzing trace with hash -862340150, now seen corresponding path program 1 times [2018-10-27 08:37:19,862 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 08:37:19,863 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:37:19,863 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 08:37:19,863 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:37:19,864 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 08:37:19,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 08:37:20,640 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 129 proven. 2 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2018-10-27 08:37:20,640 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 08:37:20,641 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 08:37:20,641 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 318 with the following transitions: [2018-10-27 08:37:20,641 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], [1102], [1110], [1118], [1126], [1134], [1142], [1150], [1158], [1162], [1164], [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], [1654], [2279], [2283], [2287], [2293], [2297], [2299], [2306], [2307], [2308], [2310], [2311] [2018-10-27 08:37:20,659 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-27 08:37:20,660 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 08:37:21,013 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-27 08:37:21,013 INFO L272 AbstractInterpreter]: Visited 169 different actions 337 times. Merged at 7 different actions 11 times. Never widened. Found 2 fixpoints after 2 different actions. Largest state had 26 variables. [2018-10-27 08:37:21,052 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 08:37:21,053 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-27 08:37:21,053 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 08:37:21,053 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 08:37:21,063 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 08:37:21,063 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-27 08:37:21,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 08:37:21,158 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 08:37:21,682 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 129 proven. 2 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2018-10-27 08:37:21,682 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 08:37:26,092 WARN L179 SmtUtils]: Spent 2.02 s on a formula simplification. DAG size of input: 39 DAG size of output: 15 [2018-10-27 08:37:26,797 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 129 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 08:37:26,818 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-27 08:37:26,818 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8] total 16 [2018-10-27 08:37:26,818 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-27 08:37:26,819 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-27 08:37:26,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-27 08:37:26,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2018-10-27 08:37:26,820 INFO L87 Difference]: Start difference. First operand 8488 states and 10056 transitions. Second operand 10 states. [2018-10-27 08:37:47,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 08:37:47,629 INFO L93 Difference]: Finished difference Result 29028 states and 35394 transitions. [2018-10-27 08:37:47,638 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-27 08:37:47,638 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 317 [2018-10-27 08:37:47,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 08:37:47,709 INFO L225 Difference]: With dead ends: 29028 [2018-10-27 08:37:47,709 INFO L226 Difference]: Without dead ends: 20102 [2018-10-27 08:37:47,728 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 650 GetRequests, 627 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=160, Invalid=392, Unknown=0, NotChecked=0, Total=552 [2018-10-27 08:37:47,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20102 states. [2018-10-27 08:37:48,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20102 to 17383. [2018-10-27 08:37:48,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17383 states. [2018-10-27 08:37:48,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17383 states to 17383 states and 20505 transitions. [2018-10-27 08:37:48,117 INFO L78 Accepts]: Start accepts. Automaton has 17383 states and 20505 transitions. Word has length 317 [2018-10-27 08:37:48,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 08:37:48,117 INFO L481 AbstractCegarLoop]: Abstraction has 17383 states and 20505 transitions. [2018-10-27 08:37:48,118 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-27 08:37:48,118 INFO L276 IsEmpty]: Start isEmpty. Operand 17383 states and 20505 transitions. [2018-10-27 08:37:48,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 426 [2018-10-27 08:37:48,132 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 08:37:48,133 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:37:48,133 INFO L424 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 08:37:48,133 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 08:37:48,133 INFO L82 PathProgramCache]: Analyzing trace with hash -1394066486, now seen corresponding path program 1 times [2018-10-27 08:37:48,133 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 08:37:48,134 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:37:48,134 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 08:37:48,134 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:37:48,135 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 08:37:48,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 08:37:48,679 INFO L134 CoverageAnalysis]: Checked inductivity of 470 backedges. 192 proven. 192 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2018-10-27 08:37:48,679 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 08:37:48,679 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 08:37:48,679 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 426 with the following transitions: [2018-10-27 08:37:48,680 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], [1102], [1110], [1118], [1126], [1134], [1142], [1150], [1158], [1162], [1164], [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], [1376], [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], [1654], [2279], [2283], [2287], [2293], [2297], [2299], [2306], [2307], [2308], [2310], [2311] [2018-10-27 08:37:48,684 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-27 08:37:48,684 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 08:37:49,002 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-27 08:37:49,003 INFO L272 AbstractInterpreter]: Visited 170 different actions 341 times. Merged at 8 different actions 13 times. Never widened. Found 3 fixpoints after 3 different actions. Largest state had 26 variables. [2018-10-27 08:37:49,040 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 08:37:49,040 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-27 08:37:49,041 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 08:37:49,041 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 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 [2018-10-27 08:37:49,050 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 08:37:49,051 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-27 08:37:49,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 08:37:49,169 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 08:37:49,497 INFO L134 CoverageAnalysis]: Checked inductivity of 470 backedges. 192 proven. 0 refuted. 0 times theorem prover too weak. 278 trivial. 0 not checked. [2018-10-27 08:37:49,498 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 08:37:49,661 INFO L134 CoverageAnalysis]: Checked inductivity of 470 backedges. 192 proven. 0 refuted. 0 times theorem prover too weak. 278 trivial. 0 not checked. [2018-10-27 08:37:49,685 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-10-27 08:37:49,685 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [7] total 9 [2018-10-27 08:37:49,685 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 08:37:49,687 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-27 08:37:49,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-27 08:37:49,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2018-10-27 08:37:49,688 INFO L87 Difference]: Start difference. First operand 17383 states and 20505 transitions. Second operand 3 states. [2018-10-27 08:37:57,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 08:37:57,197 INFO L93 Difference]: Finished difference Result 43053 states and 52042 transitions. [2018-10-27 08:37:57,200 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-27 08:37:57,200 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 425 [2018-10-27 08:37:57,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 08:37:57,286 INFO L225 Difference]: With dead ends: 43053 [2018-10-27 08:37:57,286 INFO L226 Difference]: Without dead ends: 25714 [2018-10-27 08:37:57,318 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 858 GetRequests, 851 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2018-10-27 08:37:57,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25714 states. [2018-10-27 08:37:57,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25714 to 25695. [2018-10-27 08:37:57,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25695 states. [2018-10-27 08:37:57,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25695 states to 25695 states and 30466 transitions. [2018-10-27 08:37:57,758 INFO L78 Accepts]: Start accepts. Automaton has 25695 states and 30466 transitions. Word has length 425 [2018-10-27 08:37:57,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 08:37:57,759 INFO L481 AbstractCegarLoop]: Abstraction has 25695 states and 30466 transitions. [2018-10-27 08:37:57,759 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-27 08:37:57,759 INFO L276 IsEmpty]: Start isEmpty. Operand 25695 states and 30466 transitions. [2018-10-27 08:37:57,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 742 [2018-10-27 08:37:57,823 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 08:37:57,824 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 08:37:57,825 INFO L424 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 08:37:57,825 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 08:37:57,825 INFO L82 PathProgramCache]: Analyzing trace with hash 1481036896, now seen corresponding path program 1 times [2018-10-27 08:37:57,825 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 08:37:57,826 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:37:57,826 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 08:37:57,826 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:37:57,826 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 08:37:57,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 08:37:58,465 INFO L134 CoverageAnalysis]: Checked inductivity of 604 backedges. 194 proven. 2 refuted. 0 times theorem prover too weak. 408 trivial. 0 not checked. [2018-10-27 08:37:58,465 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 08:37:58,466 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 08:37:58,466 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 742 with the following transitions: [2018-10-27 08:37:58,467 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [6], [10], [14], [18], [22], [26], [37], [41], [45], [56], [60], [64], [68], [72], [76], [80], [84], [88], [92], [96], [100], [104], [115], [119], [123], [127], [138], [142], [146], [150], [154], [158], [169], [173], [177], [181], [185], [189], [193], [204], [208], [212], [216], [219], [222], [226], [710], [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], [1102], [1110], [1118], [1126], [1134], [1142], [1150], [1158], [1162], [1164], [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], [1787], [1791], [1795], [1799], [1803], [1807], [1818], [1822], [1826], [1830], [1834], [1838], [1842], [1846], [1850], [1854], [1858], [1862], [1866], [1870], [1874], [1878], [1882], [1886], [1890], [1894], [1898], [1902], [1906], [1910], [1914], [1918], [1922], [1933], [1937], [1941], [1945], [1949], [1960], [1964], [1968], [1972], [1976], [1980], [1984], [1988], [1992], [1996], [2000], [2004], [2008], [2012], [2016], [2020], [2024], [2028], [2031], [2034], [2038], [2039], [2043], [2047], [2051], [2055], [2066], [2070], [2074], [2078], [2089], [2093], [2104], [2108], [2119], [2123], [2127], [2131], [2135], [2139], [2143], [2147], [2151], [2155], [2159], [2163], [2167], [2171], [2175], [2179], [2183], [2187], [2191], [2202], [2206], [2210], [2214], [2218], [2229], [2233], [2237], [2241], [2252], [2256], [2260], [2264], [2268], [2272], [2276], [2278], [2279], [2283], [2287], [2293], [2297], [2299], [2304], [2305], [2306], [2307], [2308], [2310], [2311] [2018-10-27 08:37:58,475 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-27 08:37:58,475 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 08:37:59,334 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-27 08:37:59,335 INFO L272 AbstractInterpreter]: Visited 348 different actions 692 times. Merged at 7 different actions 11 times. Never widened. Found 2 fixpoints after 2 different actions. Largest state had 26 variables. [2018-10-27 08:37:59,372 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 08:37:59,373 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-27 08:37:59,373 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 08:37:59,373 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-27 08:37:59,384 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 08:37:59,385 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-27 08:37:59,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 08:37:59,598 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 08:37:59,820 INFO L134 CoverageAnalysis]: Checked inductivity of 604 backedges. 454 proven. 0 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2018-10-27 08:37:59,820 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 08:38:00,315 INFO L134 CoverageAnalysis]: Checked inductivity of 604 backedges. 194 proven. 2 refuted. 0 times theorem prover too weak. 408 trivial. 0 not checked. [2018-10-27 08:38:00,336 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-10-27 08:38:00,337 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 3 [2018-10-27 08:38:00,337 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 08:38:00,338 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-27 08:38:00,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-27 08:38:00,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-27 08:38:00,338 INFO L87 Difference]: Start difference. First operand 25695 states and 30466 transitions. Second operand 3 states. [2018-10-27 08:38:05,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 08:38:05,621 INFO L93 Difference]: Finished difference Result 60109 states and 72040 transitions. [2018-10-27 08:38:05,621 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-27 08:38:05,621 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 741 [2018-10-27 08:38:05,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 08:38:05,716 INFO L225 Difference]: With dead ends: 60109 [2018-10-27 08:38:05,716 INFO L226 Difference]: Without dead ends: 34458 [2018-10-27 08:38:05,753 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1484 GetRequests, 1483 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-27 08:38:05,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34458 states. [2018-10-27 08:38:06,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34458 to 34452. [2018-10-27 08:38:06,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34452 states. [2018-10-27 08:38:06,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34452 states to 34452 states and 40562 transitions. [2018-10-27 08:38:06,298 INFO L78 Accepts]: Start accepts. Automaton has 34452 states and 40562 transitions. Word has length 741 [2018-10-27 08:38:06,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 08:38:06,299 INFO L481 AbstractCegarLoop]: Abstraction has 34452 states and 40562 transitions. [2018-10-27 08:38:06,299 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-27 08:38:06,299 INFO L276 IsEmpty]: Start isEmpty. Operand 34452 states and 40562 transitions. [2018-10-27 08:38:06,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 766 [2018-10-27 08:38:06,379 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 08:38:06,380 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:38:06,380 INFO L424 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 08:38:06,380 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 08:38:06,381 INFO L82 PathProgramCache]: Analyzing trace with hash -1204828639, now seen corresponding path program 1 times [2018-10-27 08:38:06,381 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 08:38:06,381 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:38:06,382 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 08:38:06,382 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:38:06,382 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 08:38:06,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 08:38:07,078 INFO L134 CoverageAnalysis]: Checked inductivity of 1294 backedges. 334 proven. 2 refuted. 0 times theorem prover too weak. 958 trivial. 0 not checked. [2018-10-27 08:38:07,079 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 08:38:07,079 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 08:38:07,079 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 766 with the following transitions: [2018-10-27 08:38:07,081 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], [1102], [1110], [1118], [1126], [1134], [1142], [1150], [1158], [1162], [1164], [1167], [1175], [1183], [1191], [1199], [1204], [1208], [1212], [1216], [1220], [1224], [1228], [1232], [1236], [1240], [1244], [1255], [1259], [1263], [1266], [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], [1384], [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], [1670], [1673], [1677], [1678], [1689], [1693], [1697], [1701], [1705], [1709], [1713], [1717], [1728], [1732], [1736], [1747], [1751], [1755], [1759], [1763], [1767], [1771], [1775], [1779], [1783], [1787], [1791], [1795], [1799], [1803], [1807], [1818], [1822], [1826], [1830], [1834], [1838], [1842], [1846], [1850], [1854], [1858], [1862], [1866], [1870], [1874], [1878], [1882], [1886], [1890], [1894], [1898], [1902], [1906], [1910], [1914], [1918], [1922], [1933], [1937], [1941], [1945], [1949], [1960], [1964], [1968], [1972], [1976], [1980], [1984], [1988], [1992], [1996], [2000], [2004], [2008], [2012], [2016], [2020], [2024], [2028], [2039], [2043], [2047], [2051], [2055], [2066], [2069], [2279], [2283], [2287], [2293], [2297], [2299], [2306], [2307], [2308], [2310], [2311] [2018-10-27 08:38:07,086 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-27 08:38:07,087 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 08:38:08,097 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-27 08:38:08,097 INFO L272 AbstractInterpreter]: Visited 262 different actions 531 times. Merged at 10 different actions 21 times. Never widened. Found 5 fixpoints after 3 different actions. Largest state had 26 variables. [2018-10-27 08:38:08,135 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 08:38:08,135 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-27 08:38:08,135 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 08:38:08,135 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-27 08:38:08,146 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 08:38:08,146 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-27 08:38:08,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 08:38:08,364 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 08:38:08,696 INFO L134 CoverageAnalysis]: Checked inductivity of 1294 backedges. 700 proven. 0 refuted. 0 times theorem prover too weak. 594 trivial. 0 not checked. [2018-10-27 08:38:08,696 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 08:38:08,971 INFO L134 CoverageAnalysis]: Checked inductivity of 1294 backedges. 334 proven. 2 refuted. 0 times theorem prover too weak. 958 trivial. 0 not checked. [2018-10-27 08:38:08,993 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-10-27 08:38:08,993 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 4 [2018-10-27 08:38:08,993 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 08:38:08,994 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-27 08:38:08,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-27 08:38:08,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-27 08:38:08,995 INFO L87 Difference]: Start difference. First operand 34452 states and 40562 transitions. Second operand 3 states. [2018-10-27 08:38:12,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 08:38:12,825 INFO L93 Difference]: Finished difference Result 86767 states and 103635 transitions. [2018-10-27 08:38:12,826 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-27 08:38:12,826 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 765 [2018-10-27 08:38:12,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 08:38:12,999 INFO L225 Difference]: With dead ends: 86767 [2018-10-27 08:38:12,999 INFO L226 Difference]: Without dead ends: 52359 [2018-10-27 08:38:13,051 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1532 GetRequests, 1530 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 08:38:13,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52359 states. [2018-10-27 08:38:13,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52359 to 51907. [2018-10-27 08:38:13,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51907 states. [2018-10-27 08:38:13,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51907 states to 51907 states and 61626 transitions. [2018-10-27 08:38:13,908 INFO L78 Accepts]: Start accepts. Automaton has 51907 states and 61626 transitions. Word has length 765 [2018-10-27 08:38:13,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 08:38:13,909 INFO L481 AbstractCegarLoop]: Abstraction has 51907 states and 61626 transitions. [2018-10-27 08:38:13,909 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-27 08:38:13,909 INFO L276 IsEmpty]: Start isEmpty. Operand 51907 states and 61626 transitions. [2018-10-27 08:38:13,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 825 [2018-10-27 08:38:13,985 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 08:38:13,986 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 08:38:13,986 INFO L424 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 08:38:13,987 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 08:38:13,987 INFO L82 PathProgramCache]: Analyzing trace with hash 931726353, now seen corresponding path program 1 times [2018-10-27 08:38:13,987 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 08:38:13,988 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:38:13,989 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 08:38:13,989 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:38:13,990 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 08:38:14,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 08:38:14,916 INFO L134 CoverageAnalysis]: Checked inductivity of 949 backedges. 257 proven. 0 refuted. 0 times theorem prover too weak. 692 trivial. 0 not checked. [2018-10-27 08:38:14,917 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 08:38:14,917 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-27 08:38:14,917 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 08:38:14,918 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-27 08:38:14,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-27 08:38:14,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-10-27 08:38:14,919 INFO L87 Difference]: Start difference. First operand 51907 states and 61626 transitions. Second operand 4 states. [2018-10-27 08:38:18,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 08:38:18,441 INFO L93 Difference]: Finished difference Result 92361 states and 109218 transitions. [2018-10-27 08:38:18,441 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-27 08:38:18,442 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 824 [2018-10-27 08:38:18,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 08:38:18,562 INFO L225 Difference]: With dead ends: 92361 [2018-10-27 08:38:18,563 INFO L226 Difference]: Without dead ends: 40497 [2018-10-27 08:38:18,638 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-10-27 08:38:18,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40497 states. [2018-10-27 08:38:19,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40497 to 40494. [2018-10-27 08:38:19,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40494 states. [2018-10-27 08:38:19,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40494 states to 40494 states and 47488 transitions. [2018-10-27 08:38:19,618 INFO L78 Accepts]: Start accepts. Automaton has 40494 states and 47488 transitions. Word has length 824 [2018-10-27 08:38:19,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 08:38:19,619 INFO L481 AbstractCegarLoop]: Abstraction has 40494 states and 47488 transitions. [2018-10-27 08:38:19,619 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-27 08:38:19,619 INFO L276 IsEmpty]: Start isEmpty. Operand 40494 states and 47488 transitions. [2018-10-27 08:38:19,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 904 [2018-10-27 08:38:19,682 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 08:38:19,683 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:38:19,683 INFO L424 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 08:38:19,683 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 08:38:19,684 INFO L82 PathProgramCache]: Analyzing trace with hash 1458170341, now seen corresponding path program 1 times [2018-10-27 08:38:19,684 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 08:38:19,685 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:38:19,685 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 08:38:19,685 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:38:19,686 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 08:38:19,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 08:38:21,288 INFO L134 CoverageAnalysis]: Checked inductivity of 933 backedges. 255 proven. 423 refuted. 0 times theorem prover too weak. 255 trivial. 0 not checked. [2018-10-27 08:38:21,288 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 08:38:21,288 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 08:38:21,288 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 904 with the following transitions: [2018-10-27 08:38:21,289 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [6], [10], [14], [18], [22], [26], [37], [41], [45], [56], [60], [64], [68], [72], [76], [80], [84], [88], [92], [96], [100], [104], [115], [119], [123], [127], [138], [142], [146], [150], [154], [158], [169], [173], [177], [181], [185], [189], [193], [204], [208], [212], [216], [227], [231], [235], [239], [250], [254], [258], [262], [266], [270], [274], [278], [282], [286], [297], [301], [305], [309], [313], [317], [321], [325], [336], [340], [344], [348], [352], [363], [367], [371], [375], [379], [383], [387], [391], [395], [399], [403], [407], [411], [415], [426], [430], [434], [445], [449], [453], [464], [475], [479], [483], [487], [491], [495], [499], [503], [507], [511], [515], [519], [530], [534], [538], [549], [553], [557], [561], [565], [569], [573], [584], [587], [592], [594], [710], [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], [1102], [1110], [1118], [1126], [1134], [1142], [1150], [1158], [1162], [1164], [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], [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], [1787], [1791], [1795], [1799], [1803], [1807], [1818], [1822], [1826], [1830], [1834], [1838], [1842], [1846], [1850], [1854], [1858], [1862], [1866], [1870], [1874], [1878], [1882], [1886], [1890], [1894], [1898], [1902], [1906], [1910], [1914], [1918], [1922], [1933], [1937], [1941], [1945], [1949], [1960], [1964], [1968], [1972], [1976], [1980], [1984], [1988], [1992], [1996], [2000], [2004], [2008], [2012], [2016], [2020], [2024], [2028], [2039], [2043], [2047], [2051], [2055], [2066], [2069], [2070], [2074], [2078], [2089], [2093], [2104], [2108], [2119], [2123], [2127], [2131], [2135], [2139], [2143], [2147], [2151], [2155], [2159], [2163], [2167], [2171], [2175], [2179], [2183], [2187], [2191], [2202], [2206], [2210], [2214], [2218], [2229], [2233], [2237], [2241], [2252], [2256], [2260], [2264], [2268], [2272], [2276], [2278], [2279], [2283], [2287], [2293], [2297], [2299], [2304], [2305], [2306], [2307], [2308], [2310], [2311] [2018-10-27 08:38:21,298 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-27 08:38:21,298 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 08:38:22,078 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-27 08:38:22,079 INFO L272 AbstractInterpreter]: Visited 422 different actions 844 times. Merged at 9 different actions 17 times. Never widened. Found 4 fixpoints after 2 different actions. Largest state had 26 variables. [2018-10-27 08:38:22,088 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 08:38:22,088 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-27 08:38:22,088 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 08:38:22,088 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-27 08:38:22,097 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 08:38:22,097 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-27 08:38:22,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 08:38:22,346 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 08:38:23,327 INFO L134 CoverageAnalysis]: Checked inductivity of 933 backedges. 675 proven. 2 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2018-10-27 08:38:23,328 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 08:38:24,335 INFO L134 CoverageAnalysis]: Checked inductivity of 933 backedges. 675 proven. 2 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2018-10-27 08:38:24,357 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-27 08:38:24,358 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6, 6] total 19 [2018-10-27 08:38:24,358 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-27 08:38:24,360 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-27 08:38:24,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-27 08:38:24,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2018-10-27 08:38:24,361 INFO L87 Difference]: Start difference. First operand 40494 states and 47488 transitions. Second operand 15 states. [2018-10-27 08:38:47,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 08:38:47,408 INFO L93 Difference]: Finished difference Result 96672 states and 116152 transitions. [2018-10-27 08:38:47,408 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-27 08:38:47,408 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 903 [2018-10-27 08:38:47,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 08:38:47,593 INFO L225 Difference]: With dead ends: 96672 [2018-10-27 08:38:47,594 INFO L226 Difference]: Without dead ends: 56222 [2018-10-27 08:38:47,660 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1841 GetRequests, 1813 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=226, Invalid=586, Unknown=0, NotChecked=0, Total=812 [2018-10-27 08:38:47,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56222 states. [2018-10-27 08:38:48,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56222 to 50149. [2018-10-27 08:38:48,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50149 states. [2018-10-27 08:38:48,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50149 states to 50149 states and 58372 transitions. [2018-10-27 08:38:48,686 INFO L78 Accepts]: Start accepts. Automaton has 50149 states and 58372 transitions. Word has length 903 [2018-10-27 08:38:48,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 08:38:48,687 INFO L481 AbstractCegarLoop]: Abstraction has 50149 states and 58372 transitions. [2018-10-27 08:38:48,687 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-27 08:38:48,687 INFO L276 IsEmpty]: Start isEmpty. Operand 50149 states and 58372 transitions. [2018-10-27 08:38:48,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 920 [2018-10-27 08:38:48,750 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 08:38:48,751 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-27 08:38:48,751 INFO L424 AbstractCegarLoop]: === Iteration 12 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 08:38:48,752 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 08:38:48,752 INFO L82 PathProgramCache]: Analyzing trace with hash -1663373971, now seen corresponding path program 1 times [2018-10-27 08:38:48,752 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 08:38:48,754 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:38:48,754 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 08:38:48,754 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:38:48,754 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 08:38:48,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 08:38:50,603 INFO L134 CoverageAnalysis]: Checked inductivity of 1358 backedges. 871 proven. 6 refuted. 0 times theorem prover too weak. 481 trivial. 0 not checked. [2018-10-27 08:38:50,603 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 08:38:50,603 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 08:38:50,604 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 920 with the following transitions: [2018-10-27 08:38:50,604 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [6], [10], [14], [18], [22], [26], [37], [41], [45], [56], [60], [64], [68], [72], [76], [80], [84], [88], [92], [96], [100], [104], [115], [119], [123], [127], [138], [142], [146], [150], [153], [710], [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], [1102], [1110], [1118], [1126], [1134], [1142], [1150], [1158], [1162], [1164], [1167], [1175], [1183], [1191], [1199], [1204], [1208], [1212], [1216], [1220], [1224], [1228], [1232], [1236], [1239], [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], [1384], [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], [1787], [1791], [1795], [1799], [1803], [1807], [1818], [1822], [1826], [1830], [1834], [1838], [1842], [1846], [1850], [1854], [1858], [1862], [1866], [1870], [1874], [1878], [1882], [1886], [1890], [1894], [1898], [1902], [1906], [1910], [1914], [1918], [1922], [1933], [1937], [1941], [1945], [1949], [1960], [1964], [1968], [1972], [1976], [1980], [1984], [1988], [1992], [1996], [2000], [2004], [2008], [2012], [2016], [2020], [2024], [2028], [2039], [2043], [2047], [2051], [2055], [2066], [2069], [2070], [2074], [2078], [2089], [2093], [2104], [2108], [2119], [2123], [2127], [2131], [2135], [2139], [2143], [2147], [2151], [2155], [2159], [2163], [2167], [2171], [2175], [2179], [2183], [2187], [2191], [2202], [2206], [2210], [2214], [2218], [2229], [2233], [2237], [2241], [2252], [2256], [2260], [2264], [2268], [2272], [2276], [2278], [2279], [2283], [2287], [2293], [2297], [2299], [2304], [2305], [2306], [2307], [2308], [2310], [2311] [2018-10-27 08:38:50,611 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-27 08:38:50,611 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 08:38:51,258 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-27 08:38:51,258 INFO L272 AbstractInterpreter]: Visited 337 different actions 679 times. Merged at 10 different actions 20 times. Never widened. Found 5 fixpoints after 2 different actions. Largest state had 26 variables. [2018-10-27 08:38:51,265 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 08:38:51,265 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-27 08:38:51,265 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 08:38:51,265 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-27 08:38:51,275 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 08:38:51,275 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-27 08:38:51,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 08:38:51,539 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 08:38:52,762 INFO L134 CoverageAnalysis]: Checked inductivity of 1358 backedges. 871 proven. 6 refuted. 0 times theorem prover too weak. 481 trivial. 0 not checked. [2018-10-27 08:38:52,763 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 08:38:54,069 INFO L134 CoverageAnalysis]: Checked inductivity of 1358 backedges. 871 proven. 247 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2018-10-27 08:38:54,090 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-27 08:38:54,091 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8] total 15 [2018-10-27 08:38:54,091 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-27 08:38:54,093 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-27 08:38:54,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-27 08:38:54,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2018-10-27 08:38:54,093 INFO L87 Difference]: Start difference. First operand 50149 states and 58372 transitions. Second operand 9 states. [2018-10-27 08:39:06,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 08:39:06,210 INFO L93 Difference]: Finished difference Result 115209 states and 134669 transitions. [2018-10-27 08:39:06,219 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-27 08:39:06,219 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 919 [2018-10-27 08:39:06,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 08:39:06,402 INFO L225 Difference]: With dead ends: 115209 [2018-10-27 08:39:06,403 INFO L226 Difference]: Without dead ends: 69455 [2018-10-27 08:39:06,469 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1861 GetRequests, 1841 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=141, Invalid=321, Unknown=0, NotChecked=0, Total=462 [2018-10-27 08:39:06,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69455 states. [2018-10-27 08:39:07,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69455 to 64625. [2018-10-27 08:39:07,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64625 states. [2018-10-27 08:39:07,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64625 states to 64625 states and 74820 transitions. [2018-10-27 08:39:07,539 INFO L78 Accepts]: Start accepts. Automaton has 64625 states and 74820 transitions. Word has length 919 [2018-10-27 08:39:07,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 08:39:07,540 INFO L481 AbstractCegarLoop]: Abstraction has 64625 states and 74820 transitions. [2018-10-27 08:39:07,540 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-27 08:39:07,541 INFO L276 IsEmpty]: Start isEmpty. Operand 64625 states and 74820 transitions. [2018-10-27 08:39:07,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 925 [2018-10-27 08:39:07,609 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 08:39:07,610 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-27 08:39:07,610 INFO L424 AbstractCegarLoop]: === Iteration 13 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 08:39:07,610 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 08:39:07,610 INFO L82 PathProgramCache]: Analyzing trace with hash -310867155, now seen corresponding path program 1 times [2018-10-27 08:39:07,610 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 08:39:07,611 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:39:07,611 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 08:39:07,612 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:39:07,612 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 08:39:07,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 08:39:08,992 WARN L179 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-10-27 08:39:09,965 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 332 proven. 615 refuted. 0 times theorem prover too weak. 431 trivial. 0 not checked. [2018-10-27 08:39:09,966 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 08:39:09,966 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 08:39:09,966 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 925 with the following transitions: [2018-10-27 08:39:09,966 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [6], [10], [14], [18], [22], [26], [37], [41], [45], [56], [60], [64], [68], [72], [76], [80], [84], [88], [92], [96], [100], [104], [115], [119], [123], [127], [138], [142], [146], [150], [153], [710], [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], [1102], [1110], [1118], [1126], [1134], [1142], [1150], [1158], [1162], [1164], [1167], [1175], [1183], [1191], [1199], [1204], [1208], [1212], [1216], [1220], [1224], [1228], [1232], [1236], [1240], [1244], [1255], [1259], [1263], [1266], [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], [1384], [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], [1787], [1791], [1795], [1799], [1803], [1807], [1818], [1822], [1826], [1830], [1834], [1838], [1842], [1846], [1850], [1854], [1858], [1862], [1866], [1870], [1874], [1878], [1882], [1886], [1890], [1894], [1898], [1902], [1906], [1910], [1914], [1918], [1922], [1933], [1937], [1941], [1945], [1949], [1960], [1964], [1968], [1972], [1976], [1980], [1984], [1988], [1992], [1996], [2000], [2004], [2008], [2012], [2016], [2020], [2024], [2028], [2039], [2043], [2047], [2051], [2055], [2066], [2069], [2070], [2074], [2078], [2089], [2093], [2104], [2108], [2119], [2123], [2127], [2131], [2135], [2139], [2143], [2147], [2151], [2155], [2159], [2163], [2167], [2171], [2175], [2179], [2183], [2187], [2191], [2202], [2206], [2210], [2214], [2218], [2229], [2233], [2237], [2241], [2252], [2256], [2260], [2264], [2268], [2272], [2276], [2278], [2279], [2283], [2287], [2293], [2297], [2299], [2304], [2305], [2306], [2307], [2308], [2310], [2311] [2018-10-27 08:39:09,972 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-27 08:39:09,972 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 08:39:10,660 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-27 08:39:10,660 INFO L272 AbstractInterpreter]: Visited 337 different actions 677 times. Merged at 10 different actions 18 times. Never widened. Found 5 fixpoints after 3 different actions. Largest state had 26 variables. [2018-10-27 08:39:10,664 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 08:39:10,664 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-27 08:39:10,664 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 08:39:10,664 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-27 08:39:10,672 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 08:39:10,672 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-27 08:39:10,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 08:39:10,937 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 08:39:17,153 WARN L179 SmtUtils]: Spent 6.09 s on a formula simplification. DAG size of input: 48 DAG size of output: 21 [2018-10-27 08:39:17,685 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 771 proven. 2 refuted. 0 times theorem prover too weak. 605 trivial. 0 not checked. [2018-10-27 08:39:17,685 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 08:39:20,203 WARN L179 SmtUtils]: Spent 2.02 s on a formula simplification. DAG size of input: 39 DAG size of output: 15 [2018-10-27 08:39:20,254 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-10-27 08:39:20,292 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 18 [2018-10-27 08:39:22,507 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 326 proven. 621 refuted. 0 times theorem prover too weak. 431 trivial. 0 not checked. [2018-10-27 08:39:22,528 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-27 08:39:22,529 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2018-10-27 08:39:22,529 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-27 08:39:22,530 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-27 08:39:22,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-27 08:39:22,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2018-10-27 08:39:22,531 INFO L87 Difference]: Start difference. First operand 64625 states and 74820 transitions. Second operand 15 states. Received shutdown request... [2018-10-27 08:39:40,090 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-10-27 08:39:40,090 WARN L550 AbstractCegarLoop]: Verification canceled [2018-10-27 08:39:40,095 WARN L205 ceAbstractionStarter]: Timeout [2018-10-27 08:39:40,096 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.10 08:39:40 BoogieIcfgContainer [2018-10-27 08:39:40,096 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-27 08:39:40,096 INFO L168 Benchmark]: Toolchain (without parser) took 230778.61 ms. Allocated memory was 1.5 GB in the beginning and 3.9 GB in the end (delta: 2.4 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 796.9 MB. Max. memory is 7.1 GB. [2018-10-27 08:39:40,097 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-27 08:39:40,098 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1582.89 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: 137.4 MB). Peak memory consumption was 137.4 MB. Max. memory is 7.1 GB. [2018-10-27 08:39:40,099 INFO L168 Benchmark]: Boogie Procedure Inliner took 477.70 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 778.6 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -928.7 MB). Peak memory consumption was 56.2 MB. Max. memory is 7.1 GB. [2018-10-27 08:39:40,100 INFO L168 Benchmark]: Boogie Preprocessor took 329.96 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: 27.9 MB). Peak memory consumption was 27.9 MB. Max. memory is 7.1 GB. [2018-10-27 08:39:40,100 INFO L168 Benchmark]: RCFGBuilder took 12621.74 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: 477.4 MB). Peak memory consumption was 477.4 MB. Max. memory is 7.1 GB. [2018-10-27 08:39:40,101 INFO L168 Benchmark]: TraceAbstraction took 215761.41 ms. Allocated memory was 2.3 GB in the beginning and 3.9 GB in the end (delta: 1.6 GB). Free memory was 1.7 GB in the beginning and 3.0 GB in the end (delta: -1.3 GB). Peak memory consumption was 304.4 MB. Max. memory is 7.1 GB. [2018-10-27 08:39:40,106 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 1582.89 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: 137.4 MB). Peak memory consumption was 137.4 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 477.70 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 778.6 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -928.7 MB). Peak memory consumption was 56.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 329.96 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: 27.9 MB). Peak memory consumption was 27.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 12621.74 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: 477.4 MB). Peak memory consumption was 477.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 215761.41 ms. Allocated memory was 2.3 GB in the beginning and 3.9 GB in the end (delta: 1.6 GB). Free memory was 1.7 GB in the beginning and 3.0 GB in the end (delta: -1.3 GB). Peak memory consumption was 304.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 194]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 194). Cancelled while BasicCegarLoop was constructing difference of abstraction (64625states) and FLOYD_HOARE automaton (currently 27 states, 15 states before enhancement),while ReachableStatesComputation was computing reachable states (19105 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 604 locations, 1 error locations. TIMEOUT Result, 215.6s OverallTime, 13 OverallIterations, 6 TraceHistogramMax, 152.8s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 4626 SDtfs, 32103 SDslu, 2728 SDs, 0 SdLazy, 44944 SolverSat, 8150 SolverUnsat, 12 SolverUnknown, 0 SolverNotchecked, 134.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 11246 GetRequests, 11075 SyntacticMatches, 14 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 810 ImplicationChecksByTransitivity, 29.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=64625occurred in iteration=12, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 7.0s AbstIntTime, 10 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 6.0s AutomataMinimizationTime, 12 MinimizatonAttempts, 15032 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.5s SsaConstructionTime, 2.1s SatisfiabilityAnalysisTime, 42.1s InterpolantComputationTime, 12197 NumberOfCodeBlocks, 12197 NumberOfCodeBlocksAsserted, 23 NumberOfCheckSat, 17693 ConstructedInterpolants, 347 QuantifiedInterpolants, 34109674 SizeOfPredicates, 20 NumberOfNonLiveVariables, 7996 ConjunctsInSsa, 63 ConjunctsInUnsatCore, 33 InterpolantComputations, 10 PerfectInterpolantSequences, 18529/20877 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown