java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data --generate-csv --csv-dir csv -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/ai/taipanbench/svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem14_label07_true-unreach-call_false-termination.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-69f5bdd-m [2018-09-18 11:47:27,834 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-18 11:47:27,836 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-18 11:47:27,850 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-18 11:47:27,851 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-18 11:47:27,852 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-18 11:47:27,853 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-18 11:47:27,855 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-18 11:47:27,858 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-18 11:47:27,859 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-18 11:47:27,860 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-09-18 11:47:27,865 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-09-18 11:47:27,866 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-09-18 11:47:27,867 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-09-18 11:47:27,870 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-09-18 11:47:27,871 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-09-18 11:47:27,872 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-09-18 11:47:27,873 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-09-18 11:47:27,875 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-09-18 11:47:27,876 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-09-18 11:47:27,877 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-09-18 11:47:27,878 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-09-18 11:47:27,881 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-09-18 11:47:27,881 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-09-18 11:47:27,881 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-09-18 11:47:27,882 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-09-18 11:47:27,883 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-09-18 11:47:27,883 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-09-18 11:47:27,884 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-09-18 11:47:27,885 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-09-18 11:47:27,885 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-09-18 11:47:27,886 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... 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[2018-09-18 11:47:27,889 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/taipanbench/svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf [2018-09-18 11:47:27,915 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-18 11:47:27,915 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-18 11:47:27,916 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-18 11:47:27,916 INFO L133 SettingsManager]: * User list type=DISABLED [2018-09-18 11:47:27,916 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-09-18 11:47:27,918 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-09-18 11:47:27,918 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-09-18 11:47:27,918 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-09-18 11:47:27,919 INFO L133 SettingsManager]: * Log string format=TERM [2018-09-18 11:47:27,919 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-09-18 11:47:27,919 INFO L133 SettingsManager]: * Parallel states before merging=1 [2018-09-18 11:47:27,919 INFO L133 SettingsManager]: * Interval Domain=false [2018-09-18 11:47:27,920 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-18 11:47:27,920 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-18 11:47:27,920 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-18 11:47:27,921 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-18 11:47:27,921 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-18 11:47:27,921 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-18 11:47:27,921 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-18 11:47:27,922 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-18 11:47:27,922 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-18 11:47:27,923 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-18 11:47:27,923 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-18 11:47:27,923 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-18 11:47:27,923 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-18 11:47:27,923 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-18 11:47:27,924 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-18 11:47:27,924 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-18 11:47:27,924 INFO L133 SettingsManager]: * Trace refinement strategy=RUBBER_TAIPAN [2018-09-18 11:47:27,924 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-18 11:47:27,925 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-18 11:47:27,925 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-18 11:47:27,925 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-09-18 11:47:27,926 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-09-18 11:47:27,992 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-18 11:47:28,010 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-18 11:47:28,015 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-18 11:47:28,017 INFO L271 PluginConnector]: Initializing CDTParser... [2018-09-18 11:47:28,017 INFO L276 PluginConnector]: CDTParser initialized [2018-09-18 11:47:28,018 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label07_true-unreach-call_false-termination.c [2018-09-18 11:47:28,359 INFO L221 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4ae26a250/42db778df7d34aaba6617506d9dbc9b8/FLAGf48006c81 [2018-09-18 11:47:28,687 INFO L277 CDTParser]: Found 1 translation units. [2018-09-18 11:47:28,688 INFO L159 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label07_true-unreach-call_false-termination.c [2018-09-18 11:47:28,717 INFO L325 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4ae26a250/42db778df7d34aaba6617506d9dbc9b8/FLAGf48006c81 [2018-09-18 11:47:28,739 INFO L333 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4ae26a250/42db778df7d34aaba6617506d9dbc9b8 [2018-09-18 11:47:28,753 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-18 11:47:28,759 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-09-18 11:47:28,761 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-09-18 11:47:28,761 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-09-18 11:47:28,768 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-09-18 11:47:28,769 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.09 11:47:28" (1/1) ... [2018-09-18 11:47:28,772 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7c4408f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 11:47:28, skipping insertion in model container [2018-09-18 11:47:28,772 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.09 11:47:28" (1/1) ... [2018-09-18 11:47:28,784 INFO L160 ieTranslatorObserver]: Starting translation in SV-COMP mode [2018-09-18 11:47:29,301 INFO L170 PostProcessor]: Settings: Checked method=main [2018-09-18 11:47:29,320 INFO L424 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-09-18 11:47:29,477 INFO L170 PostProcessor]: Settings: Checked method=main [2018-09-18 11:47:29,523 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 11:47:29 WrapperNode [2018-09-18 11:47:29,524 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-09-18 11:47:29,525 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-18 11:47:29,525 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-18 11:47:29,525 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-18 11:47:29,535 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 11:47:29" (1/1) ... [2018-09-18 11:47:29,562 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 11:47:29" (1/1) ... [2018-09-18 11:47:29,641 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-18 11:47:29,642 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-18 11:47:29,642 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-18 11:47:29,642 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-18 11:47:29,812 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 11:47:29" (1/1) ... [2018-09-18 11:47:29,812 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 11:47:29" (1/1) ... [2018-09-18 11:47:29,823 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 11:47:29" (1/1) ... [2018-09-18 11:47:29,823 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 11:47:29" (1/1) ... [2018-09-18 11:47:29,851 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 11:47:29" (1/1) ... [2018-09-18 11:47:29,866 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 11:47:29" (1/1) ... [2018-09-18 11:47:29,890 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 11:47:29" (1/1) ... [2018-09-18 11:47:29,911 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-18 11:47:29,912 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-18 11:47:29,912 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-18 11:47:29,912 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-18 11:47:29,913 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 11:47:29" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-18 11:47:29,985 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-09-18 11:47:29,985 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-09-18 11:47:29,986 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-09-18 11:47:29,986 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-09-18 11:47:29,986 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-18 11:47:29,986 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-18 11:47:29,986 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-09-18 11:47:29,986 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-09-18 11:47:33,867 INFO L356 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-18 11:47:33,867 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.09 11:47:33 BoogieIcfgContainer [2018-09-18 11:47:33,868 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-18 11:47:33,869 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-18 11:47:33,869 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-18 11:47:33,872 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-18 11:47:33,873 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.09 11:47:28" (1/3) ... [2018-09-18 11:47:33,874 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16a8077b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.09 11:47:33, skipping insertion in model container [2018-09-18 11:47:33,874 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 11:47:29" (2/3) ... [2018-09-18 11:47:33,874 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16a8077b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.09 11:47:33, skipping insertion in model container [2018-09-18 11:47:33,875 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.09 11:47:33" (3/3) ... [2018-09-18 11:47:33,877 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem14_label07_true-unreach-call_false-termination.c [2018-09-18 11:47:33,888 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-18 11:47:33,897 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-18 11:47:33,951 INFO L130 ementStrategyFactory]: Using default assertion order modulation [2018-09-18 11:47:33,952 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-18 11:47:33,952 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-18 11:47:33,952 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-18 11:47:33,952 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-18 11:47:33,953 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-18 11:47:33,953 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-18 11:47:33,953 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-18 11:47:33,953 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-18 11:47:33,981 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states. [2018-09-18 11:47:33,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-09-18 11:47:33,994 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 11:47:33,995 INFO L376 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] [2018-09-18 11:47:33,997 INFO L423 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 11:47:34,002 INFO L82 PathProgramCache]: Analyzing trace with hash -989245532, now seen corresponding path program 1 times [2018-09-18 11:47:34,005 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 11:47:34,066 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:47:34,066 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:47:34,067 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:47:34,067 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 11:47:34,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:47:34,560 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 11:47:34,563 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-18 11:47:34,563 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-09-18 11:47:34,563 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 11:47:34,570 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-18 11:47:34,588 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-18 11:47:34,589 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-18 11:47:34,593 INFO L87 Difference]: Start difference. First operand 255 states. Second operand 4 states. [2018-09-18 11:47:37,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 11:47:37,503 INFO L93 Difference]: Finished difference Result 894 states and 1610 transitions. [2018-09-18 11:47:37,504 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-18 11:47:37,506 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 54 [2018-09-18 11:47:37,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 11:47:37,545 INFO L225 Difference]: With dead ends: 894 [2018-09-18 11:47:37,546 INFO L226 Difference]: Without dead ends: 633 [2018-09-18 11:47:37,560 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-18 11:47:37,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2018-09-18 11:47:37,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 434. [2018-09-18 11:47:37,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 434 states. [2018-09-18 11:47:37,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 662 transitions. [2018-09-18 11:47:37,649 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 662 transitions. Word has length 54 [2018-09-18 11:47:37,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 11:47:37,650 INFO L480 AbstractCegarLoop]: Abstraction has 434 states and 662 transitions. [2018-09-18 11:47:37,650 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-18 11:47:37,650 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 662 transitions. [2018-09-18 11:47:37,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2018-09-18 11:47:37,659 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 11:47:37,659 INFO L376 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 11:47:37,659 INFO L423 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 11:47:37,660 INFO L82 PathProgramCache]: Analyzing trace with hash 1614354860, now seen corresponding path program 1 times [2018-09-18 11:47:37,660 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 11:47:37,661 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:47:37,662 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:47:37,662 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:47:37,662 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 11:47:37,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:47:37,998 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 11:47:37,999 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-18 11:47:37,999 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-09-18 11:47:37,999 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 11:47:38,002 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-18 11:47:38,002 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-18 11:47:38,003 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-18 11:47:38,003 INFO L87 Difference]: Start difference. First operand 434 states and 662 transitions. Second operand 4 states. [2018-09-18 11:47:40,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 11:47:40,530 INFO L93 Difference]: Finished difference Result 1594 states and 2533 transitions. [2018-09-18 11:47:40,532 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-18 11:47:40,533 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 138 [2018-09-18 11:47:40,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 11:47:40,543 INFO L225 Difference]: With dead ends: 1594 [2018-09-18 11:47:40,543 INFO L226 Difference]: Without dead ends: 780 [2018-09-18 11:47:40,549 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-18 11:47:40,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 780 states. [2018-09-18 11:47:40,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 780 to 780. [2018-09-18 11:47:40,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 780 states. [2018-09-18 11:47:40,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 780 states to 780 states and 1152 transitions. [2018-09-18 11:47:40,606 INFO L78 Accepts]: Start accepts. Automaton has 780 states and 1152 transitions. Word has length 138 [2018-09-18 11:47:40,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 11:47:40,606 INFO L480 AbstractCegarLoop]: Abstraction has 780 states and 1152 transitions. [2018-09-18 11:47:40,606 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-18 11:47:40,607 INFO L276 IsEmpty]: Start isEmpty. Operand 780 states and 1152 transitions. [2018-09-18 11:47:40,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2018-09-18 11:47:40,617 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 11:47:40,618 INFO L376 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, 2, 2, 2, 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] [2018-09-18 11:47:40,618 INFO L423 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 11:47:40,619 INFO L82 PathProgramCache]: Analyzing trace with hash 1391925776, now seen corresponding path program 1 times [2018-09-18 11:47:40,619 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 11:47:40,620 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:47:40,620 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:47:40,620 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:47:40,620 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 11:47:40,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:47:40,946 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 97 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2018-09-18 11:47:40,947 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-18 11:47:40,947 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-09-18 11:47:40,947 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 11:47:40,948 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-18 11:47:40,948 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-18 11:47:40,948 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-18 11:47:40,949 INFO L87 Difference]: Start difference. First operand 780 states and 1152 transitions. Second operand 4 states. [2018-09-18 11:47:45,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 11:47:45,854 INFO L93 Difference]: Finished difference Result 3018 states and 4610 transitions. [2018-09-18 11:47:45,855 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-18 11:47:45,855 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 224 [2018-09-18 11:47:45,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 11:47:45,874 INFO L225 Difference]: With dead ends: 3018 [2018-09-18 11:47:45,875 INFO L226 Difference]: Without dead ends: 2244 [2018-09-18 11:47:45,886 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-18 11:47:45,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2244 states. [2018-09-18 11:47:45,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2244 to 2244. [2018-09-18 11:47:45,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2244 states. [2018-09-18 11:47:45,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2244 states to 2244 states and 3149 transitions. [2018-09-18 11:47:45,976 INFO L78 Accepts]: Start accepts. Automaton has 2244 states and 3149 transitions. Word has length 224 [2018-09-18 11:47:45,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 11:47:45,977 INFO L480 AbstractCegarLoop]: Abstraction has 2244 states and 3149 transitions. [2018-09-18 11:47:45,977 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-18 11:47:45,977 INFO L276 IsEmpty]: Start isEmpty. Operand 2244 states and 3149 transitions. [2018-09-18 11:47:45,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 320 [2018-09-18 11:47:45,995 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 11:47:45,995 INFO L376 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-09-18 11:47:45,995 INFO L423 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 11:47:45,996 INFO L82 PathProgramCache]: Analyzing trace with hash -1136291269, now seen corresponding path program 1 times [2018-09-18 11:47:45,996 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 11:47:45,997 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:47:45,997 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:47:45,997 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:47:45,998 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 11:47:46,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:47:46,555 WARN L178 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 10 [2018-09-18 11:47:46,935 WARN L178 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-09-18 11:47:47,275 WARN L178 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 14 [2018-09-18 11:47:47,420 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 94 proven. 108 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-18 11:47:47,420 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 11:47:47,421 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-18 11:47:47,433 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:47:47,433 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 11:47:47,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:47:47,558 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 11:47:48,083 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 159 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2018-09-18 11:47:48,083 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 11:47:48,391 WARN L178 SmtUtils]: Spent 264.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2018-09-18 11:47:48,613 WARN L178 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 36 [2018-09-18 11:47:49,325 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 94 proven. 108 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-18 11:47:49,347 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-18 11:47:49,347 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 5] total 12 [2018-09-18 11:47:49,347 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 11:47:49,348 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-18 11:47:49,348 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-18 11:47:49,349 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2018-09-18 11:47:49,349 INFO L87 Difference]: Start difference. First operand 2244 states and 3149 transitions. Second operand 5 states. [2018-09-18 11:47:54,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 11:47:54,118 INFO L93 Difference]: Finished difference Result 6961 states and 9770 transitions. [2018-09-18 11:47:54,121 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-18 11:47:54,121 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 319 [2018-09-18 11:47:54,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 11:47:54,151 INFO L225 Difference]: With dead ends: 6961 [2018-09-18 11:47:54,151 INFO L226 Difference]: Without dead ends: 4723 [2018-09-18 11:47:54,168 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 649 GetRequests, 633 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2018-09-18 11:47:54,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4723 states. [2018-09-18 11:47:54,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4723 to 4699. [2018-09-18 11:47:54,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4699 states. [2018-09-18 11:47:54,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4699 states to 4699 states and 6475 transitions. [2018-09-18 11:47:54,302 INFO L78 Accepts]: Start accepts. Automaton has 4699 states and 6475 transitions. Word has length 319 [2018-09-18 11:47:54,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 11:47:54,302 INFO L480 AbstractCegarLoop]: Abstraction has 4699 states and 6475 transitions. [2018-09-18 11:47:54,302 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-18 11:47:54,303 INFO L276 IsEmpty]: Start isEmpty. Operand 4699 states and 6475 transitions. [2018-09-18 11:47:54,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 391 [2018-09-18 11:47:54,324 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 11:47:54,325 INFO L376 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 11:47:54,325 INFO L423 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 11:47:54,325 INFO L82 PathProgramCache]: Analyzing trace with hash 44998544, now seen corresponding path program 1 times [2018-09-18 11:47:54,326 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 11:47:54,326 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:47:54,327 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:47:54,327 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:47:54,327 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 11:47:54,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:47:54,597 WARN L178 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-09-18 11:47:54,885 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 141 proven. 132 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2018-09-18 11:47:54,885 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 11:47:54,885 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-18 11:47:54,902 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:47:54,902 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 11:47:55,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:47:55,026 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 11:47:55,638 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 187 proven. 0 refuted. 0 times theorem prover too weak. 209 trivial. 0 not checked. [2018-09-18 11:47:55,638 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 11:47:56,152 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 141 proven. 132 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2018-09-18 11:47:56,175 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-18 11:47:56,175 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 9 [2018-09-18 11:47:56,175 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 11:47:56,176 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-18 11:47:56,176 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-18 11:47:56,176 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2018-09-18 11:47:56,176 INFO L87 Difference]: Start difference. First operand 4699 states and 6475 transitions. Second operand 5 states. [2018-09-18 11:47:58,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 11:47:58,160 INFO L93 Difference]: Finished difference Result 10218 states and 14538 transitions. [2018-09-18 11:47:58,162 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-18 11:47:58,163 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 390 [2018-09-18 11:47:58,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 11:47:58,208 INFO L225 Difference]: With dead ends: 10218 [2018-09-18 11:47:58,208 INFO L226 Difference]: Without dead ends: 5525 [2018-09-18 11:47:58,232 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 788 GetRequests, 774 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2018-09-18 11:47:58,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5525 states. [2018-09-18 11:47:58,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5525 to 5440. [2018-09-18 11:47:58,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5440 states. [2018-09-18 11:47:58,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5440 states to 5440 states and 7081 transitions. [2018-09-18 11:47:58,401 INFO L78 Accepts]: Start accepts. Automaton has 5440 states and 7081 transitions. Word has length 390 [2018-09-18 11:47:58,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 11:47:58,402 INFO L480 AbstractCegarLoop]: Abstraction has 5440 states and 7081 transitions. [2018-09-18 11:47:58,402 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-18 11:47:58,402 INFO L276 IsEmpty]: Start isEmpty. Operand 5440 states and 7081 transitions. [2018-09-18 11:47:58,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 405 [2018-09-18 11:47:58,432 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 11:47:58,433 INFO L376 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 11:47:58,433 INFO L423 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 11:47:58,433 INFO L82 PathProgramCache]: Analyzing trace with hash 2012329804, now seen corresponding path program 1 times [2018-09-18 11:47:58,433 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 11:47:58,434 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:47:58,434 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:47:58,435 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:47:58,435 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 11:47:58,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:47:58,949 WARN L178 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-09-18 11:47:59,155 WARN L178 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-09-18 11:48:00,015 INFO L134 CoverageAnalysis]: Checked inductivity of 424 backedges. 229 proven. 190 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-18 11:48:00,015 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 11:48:00,016 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-18 11:48:00,026 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:48:00,026 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 11:48:00,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:48:00,136 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 11:48:00,473 INFO L134 CoverageAnalysis]: Checked inductivity of 424 backedges. 323 proven. 53 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2018-09-18 11:48:00,473 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 11:48:01,203 INFO L134 CoverageAnalysis]: Checked inductivity of 424 backedges. 151 proven. 268 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-18 11:48:01,224 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 11:48:01,224 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 5 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-18 11:48:01,241 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:48:01,241 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 11:48:01,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:48:01,466 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 11:48:02,012 INFO L134 CoverageAnalysis]: Checked inductivity of 424 backedges. 323 proven. 53 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2018-09-18 11:48:02,012 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 11:48:02,757 INFO L134 CoverageAnalysis]: Checked inductivity of 424 backedges. 151 proven. 268 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-18 11:48:02,765 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-18 11:48:02,766 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 8, 8, 8] total 26 [2018-09-18 11:48:02,766 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-18 11:48:02,767 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-18 11:48:02,767 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-18 11:48:02,767 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=498, Unknown=0, NotChecked=0, Total=650 [2018-09-18 11:48:02,768 INFO L87 Difference]: Start difference. First operand 5440 states and 7081 transitions. Second operand 15 states. [2018-09-18 11:48:08,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 11:48:08,664 INFO L93 Difference]: Finished difference Result 11798 states and 15383 transitions. [2018-09-18 11:48:08,664 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-09-18 11:48:08,664 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 404 [2018-09-18 11:48:08,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 11:48:08,690 INFO L225 Difference]: With dead ends: 11798 [2018-09-18 11:48:08,691 INFO L226 Difference]: Without dead ends: 6163 [2018-09-18 11:48:08,715 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1659 GetRequests, 1615 SyntacticMatches, 4 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 538 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=415, Invalid=1307, Unknown=0, NotChecked=0, Total=1722 [2018-09-18 11:48:08,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6163 states. [2018-09-18 11:48:08,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6163 to 5683. [2018-09-18 11:48:08,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5683 states. [2018-09-18 11:48:08,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5683 states to 5683 states and 6974 transitions. [2018-09-18 11:48:08,843 INFO L78 Accepts]: Start accepts. Automaton has 5683 states and 6974 transitions. Word has length 404 [2018-09-18 11:48:08,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 11:48:08,844 INFO L480 AbstractCegarLoop]: Abstraction has 5683 states and 6974 transitions. [2018-09-18 11:48:08,844 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-18 11:48:08,844 INFO L276 IsEmpty]: Start isEmpty. Operand 5683 states and 6974 transitions. [2018-09-18 11:48:08,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 430 [2018-09-18 11:48:08,873 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 11:48:08,874 INFO L376 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 11:48:08,874 INFO L423 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 11:48:08,874 INFO L82 PathProgramCache]: Analyzing trace with hash 569672711, now seen corresponding path program 1 times [2018-09-18 11:48:08,874 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 11:48:08,875 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:48:08,875 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:48:08,875 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:48:08,876 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 11:48:08,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:48:10,116 INFO L134 CoverageAnalysis]: Checked inductivity of 474 backedges. 237 proven. 237 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 11:48:10,116 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 11:48:10,116 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-18 11:48:10,124 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:48:10,125 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 11:48:10,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:48:10,230 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 11:48:10,448 INFO L134 CoverageAnalysis]: Checked inductivity of 474 backedges. 265 proven. 0 refuted. 0 times theorem prover too weak. 209 trivial. 0 not checked. [2018-09-18 11:48:10,448 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 11:48:10,989 INFO L134 CoverageAnalysis]: Checked inductivity of 474 backedges. 141 proven. 210 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2018-09-18 11:48:11,008 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-18 11:48:11,009 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [19, 5] total 23 [2018-09-18 11:48:11,009 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 11:48:11,010 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-18 11:48:11,010 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-18 11:48:11,010 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2018-09-18 11:48:11,012 INFO L87 Difference]: Start difference. First operand 5683 states and 6974 transitions. Second operand 5 states. [2018-09-18 11:48:15,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 11:48:15,638 INFO L93 Difference]: Finished difference Result 16695 states and 20832 transitions. [2018-09-18 11:48:15,639 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-18 11:48:15,639 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 429 [2018-09-18 11:48:15,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 11:48:15,702 INFO L225 Difference]: With dead ends: 16695 [2018-09-18 11:48:15,703 INFO L226 Difference]: Without dead ends: 11018 [2018-09-18 11:48:15,738 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 880 GetRequests, 852 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=96, Invalid=554, Unknown=0, NotChecked=0, Total=650 [2018-09-18 11:48:15,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11018 states. [2018-09-18 11:48:15,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11018 to 10906. [2018-09-18 11:48:15,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10906 states. [2018-09-18 11:48:15,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10906 states to 10906 states and 13210 transitions. [2018-09-18 11:48:15,977 INFO L78 Accepts]: Start accepts. Automaton has 10906 states and 13210 transitions. Word has length 429 [2018-09-18 11:48:15,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 11:48:15,978 INFO L480 AbstractCegarLoop]: Abstraction has 10906 states and 13210 transitions. [2018-09-18 11:48:15,978 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-18 11:48:15,978 INFO L276 IsEmpty]: Start isEmpty. Operand 10906 states and 13210 transitions. [2018-09-18 11:48:16,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 541 [2018-09-18 11:48:16,034 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 11:48:16,034 INFO L376 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, 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, 4, 4, 3, 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] [2018-09-18 11:48:16,035 INFO L423 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 11:48:16,035 INFO L82 PathProgramCache]: Analyzing trace with hash 120874092, now seen corresponding path program 1 times [2018-09-18 11:48:16,035 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 11:48:16,036 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:48:16,036 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:48:16,036 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:48:16,036 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 11:48:16,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:48:16,907 WARN L178 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-09-18 11:48:17,202 INFO L134 CoverageAnalysis]: Checked inductivity of 853 backedges. 420 proven. 112 refuted. 0 times theorem prover too weak. 321 trivial. 0 not checked. [2018-09-18 11:48:17,202 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 11:48:17,202 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-09-18 11:48:17,210 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:48:17,211 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 11:48:17,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:48:17,351 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 11:48:17,596 INFO L134 CoverageAnalysis]: Checked inductivity of 853 backedges. 696 proven. 2 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2018-09-18 11:48:17,596 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 11:48:17,765 WARN L178 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2018-09-18 11:48:18,271 INFO L134 CoverageAnalysis]: Checked inductivity of 853 backedges. 420 proven. 112 refuted. 0 times theorem prover too weak. 321 trivial. 0 not checked. [2018-09-18 11:48:18,293 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 11:48:18,293 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 8 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-18 11:48:18,308 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:48:18,309 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 11:48:18,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:48:18,612 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 11:48:18,839 INFO L134 CoverageAnalysis]: Checked inductivity of 853 backedges. 692 proven. 6 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2018-09-18 11:48:18,839 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 11:48:19,365 INFO L134 CoverageAnalysis]: Checked inductivity of 853 backedges. 420 proven. 112 refuted. 0 times theorem prover too weak. 321 trivial. 0 not checked. [2018-09-18 11:48:19,367 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-18 11:48:19,368 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5, 5, 5] total 8 [2018-09-18 11:48:19,368 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-18 11:48:19,370 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-18 11:48:19,370 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-18 11:48:19,370 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2018-09-18 11:48:19,371 INFO L87 Difference]: Start difference. First operand 10906 states and 13210 transitions. Second operand 7 states. [2018-09-18 11:48:21,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 11:48:21,884 INFO L93 Difference]: Finished difference Result 24186 states and 29894 transitions. [2018-09-18 11:48:21,887 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-18 11:48:21,888 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 540 [2018-09-18 11:48:21,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 11:48:21,938 INFO L225 Difference]: With dead ends: 24186 [2018-09-18 11:48:21,938 INFO L226 Difference]: Without dead ends: 13286 [2018-09-18 11:48:21,978 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 2179 GetRequests, 2157 SyntacticMatches, 11 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2018-09-18 11:48:21,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13286 states. [2018-09-18 11:48:22,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13286 to 13019. [2018-09-18 11:48:22,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13019 states. [2018-09-18 11:48:22,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13019 states to 13019 states and 15135 transitions. [2018-09-18 11:48:22,253 INFO L78 Accepts]: Start accepts. Automaton has 13019 states and 15135 transitions. Word has length 540 [2018-09-18 11:48:22,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 11:48:22,254 INFO L480 AbstractCegarLoop]: Abstraction has 13019 states and 15135 transitions. [2018-09-18 11:48:22,254 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-18 11:48:22,254 INFO L276 IsEmpty]: Start isEmpty. Operand 13019 states and 15135 transitions. [2018-09-18 11:48:22,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 626 [2018-09-18 11:48:22,291 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 11:48:22,291 INFO L376 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 11:48:22,292 INFO L423 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 11:48:22,292 INFO L82 PathProgramCache]: Analyzing trace with hash -95951429, now seen corresponding path program 1 times [2018-09-18 11:48:22,292 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 11:48:22,293 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:48:22,293 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:48:22,294 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:48:22,294 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 11:48:22,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:48:22,883 WARN L178 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-09-18 11:48:23,089 WARN L178 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-09-18 11:48:23,292 WARN L178 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-09-18 11:48:23,583 WARN L178 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2018-09-18 11:48:24,411 INFO L134 CoverageAnalysis]: Checked inductivity of 1240 backedges. 566 proven. 482 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2018-09-18 11:48:24,411 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 11:48:24,411 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-09-18 11:48:24,420 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:48:24,421 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 11:48:24,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:48:24,575 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 11:48:25,119 INFO L134 CoverageAnalysis]: Checked inductivity of 1240 backedges. 916 proven. 2 refuted. 0 times theorem prover too weak. 322 trivial. 0 not checked. [2018-09-18 11:48:25,119 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 11:48:25,717 INFO L134 CoverageAnalysis]: Checked inductivity of 1240 backedges. 560 proven. 112 refuted. 0 times theorem prover too weak. 568 trivial. 0 not checked. [2018-09-18 11:48:25,742 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 11:48:25,743 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 10 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-18 11:48:25,761 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:48:25,761 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 11:48:26,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:48:26,136 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 11:48:27,234 INFO L134 CoverageAnalysis]: Checked inductivity of 1240 backedges. 708 proven. 210 refuted. 0 times theorem prover too weak. 322 trivial. 0 not checked. [2018-09-18 11:48:27,235 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 11:48:28,476 INFO L134 CoverageAnalysis]: Checked inductivity of 1240 backedges. 271 proven. 690 refuted. 0 times theorem prover too weak. 279 trivial. 0 not checked. [2018-09-18 11:48:28,479 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-18 11:48:28,479 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 5, 5, 8, 8] total 16 [2018-09-18 11:48:28,479 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-18 11:48:28,480 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-18 11:48:28,480 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-18 11:48:28,480 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2018-09-18 11:48:28,481 INFO L87 Difference]: Start difference. First operand 13019 states and 15135 transitions. Second operand 13 states. [2018-09-18 11:48:31,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 11:48:31,859 INFO L93 Difference]: Finished difference Result 26503 states and 31614 transitions. [2018-09-18 11:48:31,859 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-18 11:48:31,860 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 625 [2018-09-18 11:48:31,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 11:48:31,938 INFO L225 Difference]: With dead ends: 26503 [2018-09-18 11:48:31,939 INFO L226 Difference]: Without dead ends: 13281 [2018-09-18 11:48:31,982 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 2528 GetRequests, 2490 SyntacticMatches, 15 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=171, Invalid=429, Unknown=0, NotChecked=0, Total=600 [2018-09-18 11:48:31,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13281 states. [2018-09-18 11:48:32,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13281 to 12478. [2018-09-18 11:48:32,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12478 states. [2018-09-18 11:48:32,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12478 states to 12478 states and 13952 transitions. [2018-09-18 11:48:32,272 INFO L78 Accepts]: Start accepts. Automaton has 12478 states and 13952 transitions. Word has length 625 [2018-09-18 11:48:32,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 11:48:32,273 INFO L480 AbstractCegarLoop]: Abstraction has 12478 states and 13952 transitions. [2018-09-18 11:48:32,273 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-18 11:48:32,273 INFO L276 IsEmpty]: Start isEmpty. Operand 12478 states and 13952 transitions. [2018-09-18 11:48:32,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 652 [2018-09-18 11:48:32,301 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 11:48:32,302 INFO L376 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, 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, 5, 5, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 11:48:32,302 INFO L423 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 11:48:32,303 INFO L82 PathProgramCache]: Analyzing trace with hash 1241269519, now seen corresponding path program 2 times [2018-09-18 11:48:32,303 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 11:48:32,303 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:48:32,304 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:48:32,304 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:48:32,304 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 11:48:32,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:48:33,191 WARN L178 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-09-18 11:48:33,719 WARN L178 SmtUtils]: Spent 242.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2018-09-18 11:48:34,245 WARN L178 SmtUtils]: Spent 385.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2018-09-18 11:48:35,599 INFO L134 CoverageAnalysis]: Checked inductivity of 1343 backedges. 592 proven. 534 refuted. 0 times theorem prover too weak. 217 trivial. 0 not checked. [2018-09-18 11:48:35,599 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 11:48:35,600 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-09-18 11:48:35,608 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-18 11:48:35,608 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-09-18 11:48:35,770 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-18 11:48:35,770 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-18 11:48:35,779 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 11:48:36,118 INFO L134 CoverageAnalysis]: Checked inductivity of 1343 backedges. 968 proven. 2 refuted. 0 times theorem prover too weak. 373 trivial. 0 not checked. [2018-09-18 11:48:36,119 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 11:48:37,080 INFO L134 CoverageAnalysis]: Checked inductivity of 1343 backedges. 586 proven. 112 refuted. 0 times theorem prover too weak. 645 trivial. 0 not checked. [2018-09-18 11:48:37,101 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 11:48:37,101 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 12 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-18 11:48:37,118 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-18 11:48:37,118 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-09-18 11:48:37,500 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-18 11:48:37,500 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-18 11:48:37,520 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 11:48:39,016 INFO L134 CoverageAnalysis]: Checked inductivity of 1343 backedges. 953 proven. 17 refuted. 0 times theorem prover too weak. 373 trivial. 0 not checked. [2018-09-18 11:48:39,017 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 11:48:39,407 WARN L178 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 25 [2018-09-18 11:48:41,462 INFO L134 CoverageAnalysis]: Checked inductivity of 1343 backedges. 265 proven. 748 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2018-09-18 11:48:41,465 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-18 11:48:41,465 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 5, 5, 10, 11] total 31 [2018-09-18 11:48:41,465 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-18 11:48:41,466 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-18 11:48:41,467 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-18 11:48:41,467 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=782, Unknown=0, NotChecked=0, Total=930 [2018-09-18 11:48:41,468 INFO L87 Difference]: Start difference. First operand 12478 states and 13952 transitions. Second operand 18 states. [2018-09-18 11:48:42,435 WARN L178 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 29 [2018-09-18 11:48:45,753 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 41 [2018-09-18 11:48:46,235 WARN L178 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 46 [2018-09-18 11:48:46,483 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 49 [2018-09-18 11:48:46,682 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 52 [2018-09-18 11:48:47,626 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 41 [2018-09-18 11:48:48,788 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 49 [2018-09-18 11:48:49,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 11:48:49,767 INFO L93 Difference]: Finished difference Result 27761 states and 31625 transitions. [2018-09-18 11:48:49,768 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-09-18 11:48:49,768 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 651 [2018-09-18 11:48:49,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 11:48:49,797 INFO L225 Difference]: With dead ends: 27761 [2018-09-18 11:48:49,797 INFO L226 Difference]: Without dead ends: 15289 [2018-09-18 11:48:49,837 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 2677 GetRequests, 2600 SyntacticMatches, 14 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1104 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=776, Invalid=3384, Unknown=0, NotChecked=0, Total=4160 [2018-09-18 11:48:49,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15289 states. [2018-09-18 11:48:50,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15289 to 14714. [2018-09-18 11:48:50,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14714 states. [2018-09-18 11:48:50,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14714 states to 14714 states and 16151 transitions. [2018-09-18 11:48:50,076 INFO L78 Accepts]: Start accepts. Automaton has 14714 states and 16151 transitions. Word has length 651 [2018-09-18 11:48:50,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 11:48:50,077 INFO L480 AbstractCegarLoop]: Abstraction has 14714 states and 16151 transitions. [2018-09-18 11:48:50,077 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-18 11:48:50,077 INFO L276 IsEmpty]: Start isEmpty. Operand 14714 states and 16151 transitions. [2018-09-18 11:48:50,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 774 [2018-09-18 11:48:50,107 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 11:48:50,108 INFO L376 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 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, 6, 6, 5, 4, 4, 3, 3, 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] [2018-09-18 11:48:50,108 INFO L423 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 11:48:50,109 INFO L82 PathProgramCache]: Analyzing trace with hash -1159268549, now seen corresponding path program 1 times [2018-09-18 11:48:50,109 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 11:48:50,110 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:48:50,110 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-18 11:48:50,110 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:48:50,110 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 11:48:50,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:48:51,044 INFO L134 CoverageAnalysis]: Checked inductivity of 1963 backedges. 652 proven. 224 refuted. 0 times theorem prover too weak. 1087 trivial. 0 not checked. [2018-09-18 11:48:51,044 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 11:48:51,044 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-18 11:48:51,052 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:48:51,052 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 11:48:51,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:48:51,235 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 11:48:51,654 INFO L134 CoverageAnalysis]: Checked inductivity of 1963 backedges. 1427 proven. 2 refuted. 0 times theorem prover too weak. 534 trivial. 0 not checked. [2018-09-18 11:48:51,655 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 11:48:52,041 INFO L134 CoverageAnalysis]: Checked inductivity of 1963 backedges. 652 proven. 224 refuted. 0 times theorem prover too weak. 1087 trivial. 0 not checked. [2018-09-18 11:48:52,064 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 11:48:52,064 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 14 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-18 11:48:52,079 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:48:52,079 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 11:48:52,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:48:52,478 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 11:48:52,720 INFO L134 CoverageAnalysis]: Checked inductivity of 1963 backedges. 1427 proven. 2 refuted. 0 times theorem prover too weak. 534 trivial. 0 not checked. [2018-09-18 11:48:52,720 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 11:48:53,170 INFO L134 CoverageAnalysis]: Checked inductivity of 1963 backedges. 652 proven. 224 refuted. 0 times theorem prover too weak. 1087 trivial. 0 not checked. [2018-09-18 11:48:53,172 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-18 11:48:53,173 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 9 [2018-09-18 11:48:53,173 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-18 11:48:53,175 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-18 11:48:53,175 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-18 11:48:53,175 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2018-09-18 11:48:53,176 INFO L87 Difference]: Start difference. First operand 14714 states and 16151 transitions. Second operand 7 states. [2018-09-18 11:48:57,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 11:48:57,694 INFO L93 Difference]: Finished difference Result 36803 states and 45981 transitions. [2018-09-18 11:48:57,694 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-18 11:48:57,694 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 773 [2018-09-18 11:48:57,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 11:48:57,814 INFO L225 Difference]: With dead ends: 36803 [2018-09-18 11:48:57,815 INFO L226 Difference]: Without dead ends: 22278 [2018-09-18 11:48:57,914 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 3107 GetRequests, 3092 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2018-09-18 11:48:57,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22278 states. [2018-09-18 11:48:58,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22278 to 21843. [2018-09-18 11:48:58,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21843 states. [2018-09-18 11:48:58,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21843 states to 21843 states and 24736 transitions. [2018-09-18 11:48:58,435 INFO L78 Accepts]: Start accepts. Automaton has 21843 states and 24736 transitions. Word has length 773 [2018-09-18 11:48:58,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 11:48:58,436 INFO L480 AbstractCegarLoop]: Abstraction has 21843 states and 24736 transitions. [2018-09-18 11:48:58,436 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-18 11:48:58,436 INFO L276 IsEmpty]: Start isEmpty. Operand 21843 states and 24736 transitions. [2018-09-18 11:48:58,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 815 [2018-09-18 11:48:58,466 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 11:48:58,467 INFO L376 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 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, 5, 5, 5, 5, 5, 5, 4, 3, 3, 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] [2018-09-18 11:48:58,467 INFO L423 AbstractCegarLoop]: === Iteration 12 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 11:48:58,468 INFO L82 PathProgramCache]: Analyzing trace with hash 1202926752, now seen corresponding path program 1 times [2018-09-18 11:48:58,468 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 11:48:58,469 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:48:58,469 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:48:58,469 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:48:58,469 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 11:48:58,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:49:00,216 INFO L134 CoverageAnalysis]: Checked inductivity of 2300 backedges. 866 proven. 835 refuted. 0 times theorem prover too weak. 599 trivial. 0 not checked. [2018-09-18 11:49:00,216 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 11:49:00,216 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-18 11:49:00,224 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:49:00,224 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 11:49:00,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:49:00,413 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 11:49:01,268 INFO L134 CoverageAnalysis]: Checked inductivity of 2300 backedges. 1389 proven. 2 refuted. 0 times theorem prover too weak. 909 trivial. 0 not checked. [2018-09-18 11:49:01,268 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 11:49:02,367 INFO L134 CoverageAnalysis]: Checked inductivity of 2300 backedges. 854 proven. 112 refuted. 0 times theorem prover too weak. 1334 trivial. 0 not checked. [2018-09-18 11:49:02,389 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 11:49:02,389 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 16 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-18 11:49:02,404 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:49:02,404 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 11:49:02,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:49:02,854 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 11:49:03,551 INFO L134 CoverageAnalysis]: Checked inductivity of 2300 backedges. 1381 proven. 10 refuted. 0 times theorem prover too weak. 909 trivial. 0 not checked. [2018-09-18 11:49:03,551 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 11:49:05,147 INFO L134 CoverageAnalysis]: Checked inductivity of 2300 backedges. 359 proven. 1075 refuted. 0 times theorem prover too weak. 866 trivial. 0 not checked. [MP cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (16)] Exception during sending of exit command (exit): Broken pipe [2018-09-18 11:49:05,150 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-18 11:49:05,151 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 5, 5, 8, 8] total 28 [2018-09-18 11:49:05,151 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-18 11:49:05,152 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-18 11:49:05,152 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-18 11:49:05,152 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=623, Unknown=0, NotChecked=0, Total=756 [2018-09-18 11:49:05,153 INFO L87 Difference]: Start difference. First operand 21843 states and 24736 transitions. Second operand 17 states. [2018-09-18 11:49:06,532 WARN L178 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 20 [2018-09-18 11:49:12,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 11:49:12,430 INFO L93 Difference]: Finished difference Result 42981 states and 50977 transitions. [2018-09-18 11:49:12,431 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-09-18 11:49:12,431 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 814 [2018-09-18 11:49:12,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 11:49:12,524 INFO L225 Difference]: With dead ends: 42981 [2018-09-18 11:49:12,524 INFO L226 Difference]: Without dead ends: 20483 [2018-09-18 11:49:12,604 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 3339 GetRequests, 3261 SyntacticMatches, 8 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1431 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1093, Invalid=4019, Unknown=0, NotChecked=0, Total=5112 [2018-09-18 11:49:12,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20483 states. [2018-09-18 11:49:12,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20483 to 19998. [2018-09-18 11:49:12,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19998 states. [2018-09-18 11:49:13,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19998 states to 19998 states and 22220 transitions. [2018-09-18 11:49:13,017 INFO L78 Accepts]: Start accepts. Automaton has 19998 states and 22220 transitions. Word has length 814 [2018-09-18 11:49:13,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 11:49:13,018 INFO L480 AbstractCegarLoop]: Abstraction has 19998 states and 22220 transitions. [2018-09-18 11:49:13,018 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-18 11:49:13,018 INFO L276 IsEmpty]: Start isEmpty. Operand 19998 states and 22220 transitions. [2018-09-18 11:49:13,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 966 [2018-09-18 11:49:13,060 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 11:49:13,061 INFO L376 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 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, 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, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2018-09-18 11:49:13,061 INFO L423 AbstractCegarLoop]: === Iteration 13 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 11:49:13,062 INFO L82 PathProgramCache]: Analyzing trace with hash -201399489, now seen corresponding path program 1 times [2018-09-18 11:49:13,062 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 11:49:13,063 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:49:13,063 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:49:13,063 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:49:13,063 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 11:49:13,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:49:14,096 INFO L134 CoverageAnalysis]: Checked inductivity of 2621 backedges. 875 proven. 228 refuted. 0 times theorem prover too weak. 1518 trivial. 0 not checked. [2018-09-18 11:49:14,096 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 11:49:14,096 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-18 11:49:14,108 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:49:14,108 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 11:49:14,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:49:14,471 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 11:49:14,842 INFO L134 CoverageAnalysis]: Checked inductivity of 2621 backedges. 1782 proven. 2 refuted. 0 times theorem prover too weak. 837 trivial. 0 not checked. [2018-09-18 11:49:14,842 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 11:49:15,426 INFO L134 CoverageAnalysis]: Checked inductivity of 2621 backedges. 875 proven. 228 refuted. 0 times theorem prover too weak. 1518 trivial. 0 not checked. [2018-09-18 11:49:15,448 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 11:49:15,448 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 18 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-18 11:49:15,463 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:49:15,464 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 11:49:15,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:49:15,995 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 11:49:16,445 INFO L134 CoverageAnalysis]: Checked inductivity of 2621 backedges. 1782 proven. 2 refuted. 0 times theorem prover too weak. 837 trivial. 0 not checked. [2018-09-18 11:49:16,445 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 11:49:16,963 INFO L134 CoverageAnalysis]: Checked inductivity of 2621 backedges. 875 proven. 228 refuted. 0 times theorem prover too weak. 1518 trivial. 0 not checked. [2018-09-18 11:49:16,966 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-18 11:49:16,968 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 9 [2018-09-18 11:49:16,968 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-18 11:49:16,969 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-18 11:49:16,969 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-18 11:49:16,969 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2018-09-18 11:49:16,970 INFO L87 Difference]: Start difference. First operand 19998 states and 22220 transitions. Second operand 7 states. [2018-09-18 11:49:19,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 11:49:19,292 INFO L93 Difference]: Finished difference Result 40942 states and 45672 transitions. [2018-09-18 11:49:19,292 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-18 11:49:19,292 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 965 [2018-09-18 11:49:19,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 11:49:19,341 INFO L225 Difference]: With dead ends: 40942 [2018-09-18 11:49:19,342 INFO L226 Difference]: Without dead ends: 21133 [2018-09-18 11:49:19,392 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 3875 GetRequests, 3860 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2018-09-18 11:49:19,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21133 states. [2018-09-18 11:49:19,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21133 to 20955. [2018-09-18 11:49:19,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20955 states. [2018-09-18 11:49:19,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20955 states to 20955 states and 22973 transitions. [2018-09-18 11:49:19,844 INFO L78 Accepts]: Start accepts. Automaton has 20955 states and 22973 transitions. Word has length 965 [2018-09-18 11:49:19,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 11:49:19,845 INFO L480 AbstractCegarLoop]: Abstraction has 20955 states and 22973 transitions. [2018-09-18 11:49:19,845 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-18 11:49:19,845 INFO L276 IsEmpty]: Start isEmpty. Operand 20955 states and 22973 transitions. [2018-09-18 11:49:19,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1022 [2018-09-18 11:49:19,889 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 11:49:19,889 INFO L376 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 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, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 11:49:19,890 INFO L423 AbstractCegarLoop]: === Iteration 14 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 11:49:19,890 INFO L82 PathProgramCache]: Analyzing trace with hash 1679251007, now seen corresponding path program 1 times [2018-09-18 11:49:19,890 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 11:49:19,891 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:49:19,891 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:49:19,891 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:49:19,891 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 11:49:19,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:49:22,275 INFO L134 CoverageAnalysis]: Checked inductivity of 3196 backedges. 975 proven. 1376 refuted. 0 times theorem prover too weak. 845 trivial. 0 not checked. [2018-09-18 11:49:22,275 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 11:49:22,275 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-18 11:49:22,284 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:49:22,285 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 11:49:22,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:49:22,637 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 11:49:23,425 INFO L134 CoverageAnalysis]: Checked inductivity of 3196 backedges. 2032 proven. 2 refuted. 0 times theorem prover too weak. 1162 trivial. 0 not checked. [2018-09-18 11:49:23,426 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 11:49:24,456 INFO L134 CoverageAnalysis]: Checked inductivity of 3196 backedges. 991 proven. 228 refuted. 0 times theorem prover too weak. 1977 trivial. 0 not checked. [2018-09-18 11:49:24,488 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 11:49:24,488 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 20 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-18 11:49:24,512 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:49:24,513 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 11:49:25,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:49:25,058 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 11:49:25,478 INFO L134 CoverageAnalysis]: Checked inductivity of 3196 backedges. 2027 proven. 25 refuted. 0 times theorem prover too weak. 1144 trivial. 0 not checked. [2018-09-18 11:49:25,478 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 11:49:26,448 INFO L134 CoverageAnalysis]: Checked inductivity of 3196 backedges. 991 proven. 228 refuted. 0 times theorem prover too weak. 1977 trivial. 0 not checked. [2018-09-18 11:49:26,457 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-18 11:49:26,458 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 6, 6, 5, 5] total 23 [2018-09-18 11:49:26,459 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-18 11:49:26,460 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-18 11:49:26,461 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-18 11:49:26,461 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2018-09-18 11:49:26,461 INFO L87 Difference]: Start difference. First operand 20955 states and 22973 transitions. Second operand 18 states. [2018-09-18 11:49:27,303 WARN L178 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 25 [2018-09-18 11:49:28,885 WARN L178 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 48 [2018-09-18 11:49:30,647 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 50 [2018-09-18 11:49:33,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 11:49:33,738 INFO L93 Difference]: Finished difference Result 41833 states and 47006 transitions. [2018-09-18 11:49:33,739 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-09-18 11:49:33,739 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 1021 [2018-09-18 11:49:33,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 11:49:33,798 INFO L225 Difference]: With dead ends: 41833 [2018-09-18 11:49:33,798 INFO L226 Difference]: Without dead ends: 21067 [2018-09-18 11:49:33,852 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 4160 GetRequests, 4104 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 759 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=769, Invalid=2537, Unknown=0, NotChecked=0, Total=3306 [2018-09-18 11:49:33,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21067 states. [2018-09-18 11:49:34,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21067 to 20625. [2018-09-18 11:49:34,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20625 states. [2018-09-18 11:49:34,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20625 states to 20625 states and 22194 transitions. [2018-09-18 11:49:34,148 INFO L78 Accepts]: Start accepts. Automaton has 20625 states and 22194 transitions. Word has length 1021 [2018-09-18 11:49:34,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 11:49:34,148 INFO L480 AbstractCegarLoop]: Abstraction has 20625 states and 22194 transitions. [2018-09-18 11:49:34,148 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-18 11:49:34,149 INFO L276 IsEmpty]: Start isEmpty. Operand 20625 states and 22194 transitions. [2018-09-18 11:49:34,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1143 [2018-09-18 11:49:34,176 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 11:49:34,176 INFO L376 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 7, 7, 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, 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, 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] [2018-09-18 11:49:34,177 INFO L423 AbstractCegarLoop]: === Iteration 15 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 11:49:34,177 INFO L82 PathProgramCache]: Analyzing trace with hash -207694320, now seen corresponding path program 1 times [2018-09-18 11:49:34,177 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 11:49:34,178 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:49:34,178 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:49:34,178 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:49:34,178 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 11:49:34,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:49:35,514 INFO L134 CoverageAnalysis]: Checked inductivity of 3921 backedges. 1627 proven. 230 refuted. 0 times theorem prover too weak. 2064 trivial. 0 not checked. [2018-09-18 11:49:35,515 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 11:49:35,515 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-18 11:49:35,522 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:49:35,522 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 11:49:35,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:49:35,794 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 11:49:36,501 INFO L134 CoverageAnalysis]: Checked inductivity of 3921 backedges. 2426 proven. 6 refuted. 0 times theorem prover too weak. 1489 trivial. 0 not checked. [2018-09-18 11:49:36,501 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 11:49:37,344 INFO L134 CoverageAnalysis]: Checked inductivity of 3921 backedges. 1627 proven. 303 refuted. 0 times theorem prover too weak. 1991 trivial. 0 not checked. [2018-09-18 11:49:37,365 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 11:49:37,365 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 22 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-18 11:49:37,381 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:49:37,381 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 11:49:37,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:49:37,982 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 11:49:38,641 INFO L134 CoverageAnalysis]: Checked inductivity of 3921 backedges. 2426 proven. 6 refuted. 0 times theorem prover too weak. 1489 trivial. 0 not checked. [2018-09-18 11:49:38,641 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 11:49:39,004 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2018-09-18 11:49:39,811 INFO L134 CoverageAnalysis]: Checked inductivity of 3921 backedges. 1627 proven. 303 refuted. 0 times theorem prover too weak. 1991 trivial. 0 not checked. [2018-09-18 11:49:39,813 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-18 11:49:39,814 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8, 7, 8] total 15 [2018-09-18 11:49:39,814 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-18 11:49:39,817 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-18 11:49:39,817 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-18 11:49:39,817 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2018-09-18 11:49:39,818 INFO L87 Difference]: Start difference. First operand 20625 states and 22194 transitions. Second operand 9 states. [2018-09-18 11:49:43,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 11:49:43,512 INFO L93 Difference]: Finished difference Result 44801 states and 48264 transitions. [2018-09-18 11:49:43,513 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-18 11:49:43,513 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 1142 [2018-09-18 11:49:43,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 11:49:43,553 INFO L225 Difference]: With dead ends: 44801 [2018-09-18 11:49:43,553 INFO L226 Difference]: Without dead ends: 24365 [2018-09-18 11:49:43,583 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 4584 GetRequests, 4564 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=117, Invalid=263, Unknown=0, NotChecked=0, Total=380 [2018-09-18 11:49:43,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24365 states. [2018-09-18 11:49:43,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24365 to 24075. [2018-09-18 11:49:43,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24075 states. [2018-09-18 11:49:43,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24075 states to 24075 states and 25873 transitions. [2018-09-18 11:49:43,868 INFO L78 Accepts]: Start accepts. Automaton has 24075 states and 25873 transitions. Word has length 1142 [2018-09-18 11:49:43,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 11:49:43,869 INFO L480 AbstractCegarLoop]: Abstraction has 24075 states and 25873 transitions. [2018-09-18 11:49:43,869 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-18 11:49:43,869 INFO L276 IsEmpty]: Start isEmpty. Operand 24075 states and 25873 transitions. [2018-09-18 11:49:43,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1500 [2018-09-18 11:49:43,918 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 11:49:43,919 INFO L376 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 7, 7, 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, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 11:49:43,919 INFO L423 AbstractCegarLoop]: === Iteration 16 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 11:49:43,920 INFO L82 PathProgramCache]: Analyzing trace with hash -498651405, now seen corresponding path program 1 times [2018-09-18 11:49:43,920 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 11:49:43,921 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:49:43,921 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:49:43,921 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:49:43,921 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 11:49:44,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:49:44,685 WARN L178 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2018-09-18 11:49:48,624 INFO L134 CoverageAnalysis]: Checked inductivity of 6506 backedges. 1226 proven. 3191 refuted. 0 times theorem prover too weak. 2089 trivial. 0 not checked. [2018-09-18 11:49:48,624 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 11:49:48,624 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-18 11:49:48,632 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:49:48,632 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 11:49:48,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:49:48,978 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 11:49:50,017 INFO L134 CoverageAnalysis]: Checked inductivity of 6506 backedges. 3941 proven. 2 refuted. 0 times theorem prover too weak. 2563 trivial. 0 not checked. [2018-09-18 11:49:50,017 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 11:49:52,818 INFO L134 CoverageAnalysis]: Checked inductivity of 6506 backedges. 1418 proven. 388 refuted. 0 times theorem prover too weak. 4700 trivial. 0 not checked. [2018-09-18 11:49:52,839 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 11:49:52,840 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 24 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-18 11:49:52,857 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:49:52,857 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 11:49:53,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:49:53,639 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 11:49:56,692 INFO L134 CoverageAnalysis]: Checked inductivity of 6506 backedges. 4592 proven. 24 refuted. 0 times theorem prover too weak. 1890 trivial. 0 not checked. [2018-09-18 11:49:56,692 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 11:49:56,924 WARN L178 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 31 [2018-09-18 11:49:57,167 WARN L178 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2018-09-18 11:49:57,315 WARN L178 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 25 [2018-09-18 11:49:58,079 WARN L178 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2018-09-18 11:50:02,869 INFO L134 CoverageAnalysis]: Checked inductivity of 6506 backedges. 688 proven. 4057 refuted. 0 times theorem prover too weak. 1761 trivial. 0 not checked. [2018-09-18 11:50:02,872 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-18 11:50:02,874 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 5, 5, 13, 14] total 41 [2018-09-18 11:50:02,874 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-18 11:50:02,876 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-09-18 11:50:02,876 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-09-18 11:50:02,877 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=1405, Unknown=0, NotChecked=0, Total=1640 [2018-09-18 11:50:02,877 INFO L87 Difference]: Start difference. First operand 24075 states and 25873 transitions. Second operand 19 states. [2018-09-18 11:50:05,023 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 48 [2018-09-18 11:50:05,732 WARN L178 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 46 [2018-09-18 11:50:08,684 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 44 [2018-09-18 11:50:12,974 WARN L178 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 44 [2018-09-18 11:50:15,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 11:50:15,961 INFO L93 Difference]: Finished difference Result 47218 states and 53847 transitions. [2018-09-18 11:50:15,961 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-09-18 11:50:15,961 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 1499 [2018-09-18 11:50:15,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 11:50:16,050 INFO L225 Difference]: With dead ends: 47218 [2018-09-18 11:50:16,051 INFO L226 Difference]: Without dead ends: 23332 [2018-09-18 11:50:16,124 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 6098 GetRequests, 5990 SyntacticMatches, 21 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2525 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=1227, Invalid=6605, Unknown=0, NotChecked=0, Total=7832 [2018-09-18 11:50:16,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23332 states. [2018-09-18 11:50:16,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23332 to 22412. [2018-09-18 11:50:16,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22412 states. [2018-09-18 11:50:16,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22412 states to 22412 states and 23832 transitions. [2018-09-18 11:50:16,498 INFO L78 Accepts]: Start accepts. Automaton has 22412 states and 23832 transitions. Word has length 1499 [2018-09-18 11:50:16,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 11:50:16,499 INFO L480 AbstractCegarLoop]: Abstraction has 22412 states and 23832 transitions. [2018-09-18 11:50:16,499 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-09-18 11:50:16,499 INFO L276 IsEmpty]: Start isEmpty. Operand 22412 states and 23832 transitions. [2018-09-18 11:50:16,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1619 [2018-09-18 11:50:16,528 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 11:50:16,528 INFO L376 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 8, 8, 7, 7, 7, 7, 7, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 11:50:16,529 INFO L423 AbstractCegarLoop]: === Iteration 17 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 11:50:16,529 INFO L82 PathProgramCache]: Analyzing trace with hash 1054143840, now seen corresponding path program 1 times [2018-09-18 11:50:16,529 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 11:50:16,530 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:50:16,530 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:50:16,530 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:50:16,530 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 11:50:16,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:50:20,545 INFO L134 CoverageAnalysis]: Checked inductivity of 7759 backedges. 1688 proven. 1168 refuted. 0 times theorem prover too weak. 4903 trivial. 0 not checked. [2018-09-18 11:50:20,545 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 11:50:20,545 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-18 11:50:20,553 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:50:20,553 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 11:50:20,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:50:20,930 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 11:50:22,568 INFO L134 CoverageAnalysis]: Checked inductivity of 7759 backedges. 2926 proven. 2 refuted. 0 times theorem prover too weak. 4831 trivial. 0 not checked. [2018-09-18 11:50:22,569 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 11:50:25,222 INFO L134 CoverageAnalysis]: Checked inductivity of 7759 backedges. 1697 proven. 112 refuted. 0 times theorem prover too weak. 5950 trivial. 0 not checked. [2018-09-18 11:50:25,244 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 11:50:25,244 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 26 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-18 11:50:25,260 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:50:25,260 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 11:50:26,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:50:26,147 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 11:50:27,338 INFO L134 CoverageAnalysis]: Checked inductivity of 7759 backedges. 2928 proven. 60 refuted. 0 times theorem prover too weak. 4771 trivial. 0 not checked. [2018-09-18 11:50:27,338 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 11:50:29,468 INFO L134 CoverageAnalysis]: Checked inductivity of 7759 backedges. 1697 proven. 112 refuted. 0 times theorem prover too weak. 5950 trivial. 0 not checked. [2018-09-18 11:50:29,472 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-18 11:50:29,473 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 5, 5, 6, 5] total 24 [2018-09-18 11:50:29,473 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-18 11:50:29,474 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-18 11:50:29,475 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-18 11:50:29,475 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2018-09-18 11:50:29,475 INFO L87 Difference]: Start difference. First operand 22412 states and 23832 transitions. Second operand 17 states. [2018-09-18 11:50:35,417 WARN L178 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 41 [2018-09-18 11:50:36,719 WARN L178 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 41 [2018-09-18 11:50:38,726 WARN L178 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 46 [2018-09-18 11:50:38,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 11:50:38,936 INFO L93 Difference]: Finished difference Result 44802 states and 47700 transitions. [2018-09-18 11:50:38,936 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-09-18 11:50:38,936 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 1618 [2018-09-18 11:50:38,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 11:50:38,983 INFO L225 Difference]: With dead ends: 44802 [2018-09-18 11:50:38,983 INFO L226 Difference]: Without dead ends: 22579 [2018-09-18 11:50:39,012 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 6545 GetRequests, 6485 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 797 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=629, Invalid=2793, Unknown=0, NotChecked=0, Total=3422 [2018-09-18 11:50:39,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22579 states. [2018-09-18 11:50:39,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22579 to 22408. [2018-09-18 11:50:39,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22408 states. [2018-09-18 11:50:39,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22408 states to 22408 states and 23756 transitions. [2018-09-18 11:50:39,268 INFO L78 Accepts]: Start accepts. Automaton has 22408 states and 23756 transitions. Word has length 1618 [2018-09-18 11:50:39,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 11:50:39,270 INFO L480 AbstractCegarLoop]: Abstraction has 22408 states and 23756 transitions. [2018-09-18 11:50:39,270 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-18 11:50:39,270 INFO L276 IsEmpty]: Start isEmpty. Operand 22408 states and 23756 transitions. [2018-09-18 11:50:39,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1838 [2018-09-18 11:50:39,324 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 11:50:39,325 INFO L376 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 10, 9, 9, 8, 7, 7, 7, 7, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 11:50:39,325 INFO L423 AbstractCegarLoop]: === Iteration 18 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 11:50:39,326 INFO L82 PathProgramCache]: Analyzing trace with hash -1505040037, now seen corresponding path program 1 times [2018-09-18 11:50:39,326 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 11:50:39,327 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:50:39,327 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:50:39,327 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:50:39,327 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 11:50:39,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:50:44,383 INFO L134 CoverageAnalysis]: Checked inductivity of 10458 backedges. 2053 proven. 2489 refuted. 0 times theorem prover too weak. 5916 trivial. 0 not checked. [2018-09-18 11:50:44,383 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 11:50:44,383 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-18 11:50:44,392 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:50:44,392 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 11:50:44,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:50:44,802 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 11:50:46,342 INFO L134 CoverageAnalysis]: Checked inductivity of 10458 backedges. 4457 proven. 6 refuted. 0 times theorem prover too weak. 5995 trivial. 0 not checked. [2018-09-18 11:50:46,342 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 11:50:48,860 INFO L134 CoverageAnalysis]: Checked inductivity of 10458 backedges. 3021 proven. 214 refuted. 0 times theorem prover too weak. 7223 trivial. 0 not checked. [2018-09-18 11:50:48,881 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 11:50:48,881 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 28 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-18 11:50:48,898 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:50:48,898 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 11:50:49,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:50:49,909 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 11:50:52,780 INFO L134 CoverageAnalysis]: Checked inductivity of 10458 backedges. 3588 proven. 978 refuted. 0 times theorem prover too weak. 5892 trivial. 0 not checked. [2018-09-18 11:50:52,780 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 11:50:58,540 INFO L134 CoverageAnalysis]: Checked inductivity of 10458 backedges. 863 proven. 3746 refuted. 0 times theorem prover too weak. 5849 trivial. 0 not checked. [2018-09-18 11:50:58,543 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-18 11:50:58,544 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 5, 5, 11, 11] total 31 [2018-09-18 11:50:58,545 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-18 11:50:58,546 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-18 11:50:58,547 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-18 11:50:58,547 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=766, Unknown=0, NotChecked=0, Total=930 [2018-09-18 11:50:58,547 INFO L87 Difference]: Start difference. First operand 22408 states and 23756 transitions. Second operand 16 states. [2018-09-18 11:51:00,858 WARN L178 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 28 [2018-09-18 11:51:06,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 11:51:06,424 INFO L93 Difference]: Finished difference Result 44739 states and 48194 transitions. [2018-09-18 11:51:06,425 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-09-18 11:51:06,425 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 1837 [2018-09-18 11:51:06,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 11:51:06,475 INFO L225 Difference]: With dead ends: 44739 [2018-09-18 11:51:06,475 INFO L226 Difference]: Without dead ends: 21971 [2018-09-18 11:51:06,512 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 7437 GetRequests, 7339 SyntacticMatches, 34 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1556 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=889, Invalid=3401, Unknown=0, NotChecked=0, Total=4290 [2018-09-18 11:51:06,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21971 states. [2018-09-18 11:51:06,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21971 to 21238. [2018-09-18 11:51:06,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21238 states. [2018-09-18 11:51:06,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21238 states to 21238 states and 22351 transitions. [2018-09-18 11:51:06,824 INFO L78 Accepts]: Start accepts. Automaton has 21238 states and 22351 transitions. Word has length 1837 [2018-09-18 11:51:06,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 11:51:06,825 INFO L480 AbstractCegarLoop]: Abstraction has 21238 states and 22351 transitions. [2018-09-18 11:51:06,825 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-18 11:51:06,825 INFO L276 IsEmpty]: Start isEmpty. Operand 21238 states and 22351 transitions. [2018-09-18 11:51:06,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1878 [2018-09-18 11:51:06,861 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 11:51:06,862 INFO L376 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 13, 13, 13, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 9, 8, 8, 8, 8, 8, 8, 7, 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, 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, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 11:51:06,862 INFO L423 AbstractCegarLoop]: === Iteration 19 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 11:51:06,863 INFO L82 PathProgramCache]: Analyzing trace with hash -1949467577, now seen corresponding path program 1 times [2018-09-18 11:51:06,863 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 11:51:06,863 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:51:06,864 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:51:06,864 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:51:06,864 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 11:51:06,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:51:08,120 WARN L178 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2018-09-18 11:51:10,150 INFO L134 CoverageAnalysis]: Checked inductivity of 10443 backedges. 2183 proven. 501 refuted. 0 times theorem prover too weak. 7759 trivial. 0 not checked. [2018-09-18 11:51:10,150 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 11:51:10,150 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-18 11:51:10,158 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:51:10,158 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 11:51:10,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:51:10,580 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 11:51:11,807 INFO L134 CoverageAnalysis]: Checked inductivity of 10443 backedges. 4433 proven. 2 refuted. 0 times theorem prover too weak. 6008 trivial. 0 not checked. [2018-09-18 11:51:11,807 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 11:51:13,314 INFO L134 CoverageAnalysis]: Checked inductivity of 10443 backedges. 2204 proven. 228 refuted. 0 times theorem prover too weak. 8011 trivial. 0 not checked. [2018-09-18 11:51:13,341 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 11:51:13,341 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 30 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-18 11:51:13,358 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:51:13,358 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 11:51:14,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:51:14,367 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 11:51:15,714 INFO L134 CoverageAnalysis]: Checked inductivity of 10443 backedges. 4433 proven. 2 refuted. 0 times theorem prover too weak. 6008 trivial. 0 not checked. [2018-09-18 11:51:15,715 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 11:51:17,309 INFO L134 CoverageAnalysis]: Checked inductivity of 10443 backedges. 2204 proven. 228 refuted. 0 times theorem prover too weak. 8011 trivial. 0 not checked. [2018-09-18 11:51:17,315 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-18 11:51:17,316 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5, 5, 5] total 12 [2018-09-18 11:51:17,317 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-18 11:51:17,318 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-18 11:51:17,319 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-18 11:51:17,319 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2018-09-18 11:51:17,319 INFO L87 Difference]: Start difference. First operand 21238 states and 22351 transitions. Second operand 11 states. Received shutdown request... [2018-09-18 11:51:18,702 WARN L186 SmtUtils]: Removed 3 from assertion stack [2018-09-18 11:51:18,703 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-18 11:51:18,703 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-18 11:51:18,708 WARN L206 ceAbstractionStarter]: Timeout [2018-09-18 11:51:18,708 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.09 11:51:18 BoogieIcfgContainer [2018-09-18 11:51:18,708 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-18 11:51:18,709 INFO L168 Benchmark]: Toolchain (without parser) took 229955.62 ms. Allocated memory was 1.5 GB in the beginning and 4.2 GB in the end (delta: 2.6 GB). Free memory was 1.4 GB in the beginning and 3.5 GB in the end (delta: -2.1 GB). Peak memory consumption was 561.0 MB. Max. memory is 7.1 GB. [2018-09-18 11:51:18,709 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. [2018-09-18 11:51:18,710 INFO L168 Benchmark]: CACSL2BoogieTranslator took 762.81 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 52.9 MB). Peak memory consumption was 52.9 MB. Max. memory is 7.1 GB. [2018-09-18 11:51:18,710 INFO L168 Benchmark]: Boogie Procedure Inliner took 116.97 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2018-09-18 11:51:18,711 INFO L168 Benchmark]: Boogie Preprocessor took 269.83 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 787.5 MB). Free memory was 1.4 GB in the beginning and 2.3 GB in the end (delta: -887.1 MB). Peak memory consumption was 33.0 MB. Max. memory is 7.1 GB. [2018-09-18 11:51:18,712 INFO L168 Benchmark]: RCFGBuilder took 3955.87 ms. Allocated memory is still 2.3 GB. Free memory was 2.3 GB in the beginning and 2.1 GB in the end (delta: 122.6 MB). Peak memory consumption was 122.6 MB. Max. memory is 7.1 GB. [2018-09-18 11:51:18,712 INFO L168 Benchmark]: TraceAbstraction took 224839.31 ms. Allocated memory was 2.3 GB in the beginning and 4.2 GB in the end (delta: 1.9 GB). Free memory was 2.1 GB in the beginning and 3.5 GB in the end (delta: -1.4 GB). Peak memory consumption was 474.5 MB. Max. memory is 7.1 GB. [2018-09-18 11:51:18,716 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 762.81 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 52.9 MB). Peak memory consumption was 52.9 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 116.97 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 269.83 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 787.5 MB). Free memory was 1.4 GB in the beginning and 2.3 GB in the end (delta: -887.1 MB). Peak memory consumption was 33.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 3955.87 ms. Allocated memory is still 2.3 GB. Free memory was 2.3 GB in the beginning and 2.1 GB in the end (delta: 122.6 MB). Peak memory consumption was 122.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 224839.31 ms. Allocated memory was 2.3 GB in the beginning and 4.2 GB in the end (delta: 1.9 GB). Free memory was 2.1 GB in the beginning and 3.5 GB in the end (delta: -1.4 GB). Peak memory consumption was 474.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 145]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 145). Cancelled while BasicCegarLoop was constructing difference of abstraction (21238states) and FLOYD_HOARE automaton (currently 9 states, 11 states before enhancement), while PredicateUnifier was unifying predicates, while SimplifyDDAWithTimeout was simplifying term of DAG size 20. - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 255 locations, 1 error locations. TIMEOUT Result, 224.7s OverallTime, 19 OverallIterations, 15 TraceHistogramMax, 100.4s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 1566 SDtfs, 38492 SDslu, 3545 SDs, 0 SdLazy, 51983 SolverSat, 6667 SolverUnsat, 3 SolverUnknown, 0 SolverNotchecked, 65.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 58045 GetRequests, 57329 SyntacticMatches, 132 SemanticMatches, 583 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9320 ImplicationChecksByTransitivity, 37.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=24075occurred in iteration=15, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 4.5s AutomataMinimizationTime, 18 MinimizatonAttempts, 6199 StatesRemovedByMinimization, 16 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 1.2s SsaConstructionTime, 11.1s SatisfiabilityAnalysisTime, 88.3s InterpolantComputationTime, 43990 NumberOfCodeBlocks, 43990 NumberOfCodeBlocksAsserted, 50 NumberOfCheckSat, 72583 ConstructedInterpolants, 12 QuantifiedInterpolants, 303192894 SizeOfPredicates, 100 NumberOfNonLiveVariables, 40016 ConjunctsInSsa, 548 ConjunctsInUnsatCore, 77 InterpolantComputations, 6 PerfectInterpolantSequences, 239954/268581 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Problem14_label07_true-unreach-call_false-termination.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-Benchmark-0-2018-09-18_11-51-18-729.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Problem14_label07_true-unreach-call_false-termination.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-18_11-51-18-729.csv Completed graceful shutdown