java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-INT-LIM.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem11_label12_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-df4b876 [2018-11-07 20:06:35,797 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-07 20:06:35,799 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-07 20:06:35,815 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-07 20:06:35,815 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-07 20:06:35,816 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-07 20:06:35,817 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-07 20:06:35,819 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-07 20:06:35,821 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-07 20:06:35,821 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-07 20:06:35,822 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-07 20:06:35,823 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-07 20:06:35,824 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-07 20:06:35,825 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-07 20:06:35,826 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-07 20:06:35,827 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-07 20:06:35,828 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-07 20:06:35,830 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-07 20:06:35,832 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-07 20:06:35,833 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-07 20:06:35,834 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-07 20:06:35,839 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-07 20:06:35,841 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-07 20:06:35,842 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-07 20:06:35,842 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-07 20:06:35,843 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-07 20:06:35,847 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-07 20:06:35,848 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-07 20:06:35,848 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-07 20:06:35,851 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-07 20:06:35,851 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-07 20:06:35,853 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-07 20:06:35,854 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-07 20:06:35,854 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-07 20:06:35,855 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-07 20:06:35,855 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-07 20:06:35,856 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-INT-LIM.epf [2018-11-07 20:06:35,884 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-07 20:06:35,885 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-07 20:06:35,885 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-07 20:06:35,886 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-07 20:06:35,886 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-07 20:06:35,886 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-07 20:06:35,887 INFO L133 SettingsManager]: * Maximum recursion depth of evaluation operations=6 [2018-11-07 20:06:35,887 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-07 20:06:35,887 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-07 20:06:35,887 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-07 20:06:35,887 INFO L133 SettingsManager]: * Log string format=TERM [2018-11-07 20:06:35,888 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-07 20:06:35,888 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-07 20:06:35,889 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-07 20:06:35,890 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-07 20:06:35,890 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-07 20:06:35,890 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-07 20:06:35,892 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-07 20:06:35,892 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-07 20:06:35,892 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-07 20:06:35,892 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-07 20:06:35,893 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-07 20:06:35,893 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-07 20:06:35,893 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-07 20:06:35,893 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-07 20:06:35,893 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-07 20:06:35,893 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-07 20:06:35,894 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-07 20:06:35,894 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-07 20:06:35,895 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-07 20:06:35,895 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-07 20:06:35,895 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-07 20:06:35,895 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-07 20:06:35,895 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-11-07 20:06:35,896 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-11-07 20:06:35,963 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-07 20:06:35,980 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-07 20:06:35,985 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-07 20:06:35,986 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-07 20:06:35,987 INFO L276 PluginConnector]: CDTParser initialized [2018-11-07 20:06:35,987 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label12_true-unreach-call.c [2018-11-07 20:06:36,057 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/944d8193a/b8dca98bbaf4425888b3b1b161d1b696/FLAGc964f164b [2018-11-07 20:06:36,711 INFO L298 CDTParser]: Found 1 translation units. [2018-11-07 20:06:36,713 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem11_label12_true-unreach-call.c [2018-11-07 20:06:36,732 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/944d8193a/b8dca98bbaf4425888b3b1b161d1b696/FLAGc964f164b [2018-11-07 20:06:36,751 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/944d8193a/b8dca98bbaf4425888b3b1b161d1b696 [2018-11-07 20:06:36,763 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-07 20:06:36,765 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-07 20:06:36,766 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-07 20:06:36,766 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-07 20:06:36,770 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-07 20:06:36,771 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 08:06:36" (1/1) ... [2018-11-07 20:06:36,775 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4688d22a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:06:36, skipping insertion in model container [2018-11-07 20:06:36,775 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 08:06:36" (1/1) ... [2018-11-07 20:06:36,785 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-07 20:06:36,856 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-07 20:06:37,482 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 20:06:37,487 INFO L189 MainTranslator]: Completed pre-run [2018-11-07 20:06:37,695 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 20:06:37,716 INFO L193 MainTranslator]: Completed translation [2018-11-07 20:06:37,717 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:06:37 WrapperNode [2018-11-07 20:06:37,717 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-07 20:06:37,718 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-07 20:06:37,718 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-07 20:06:37,718 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-07 20:06:37,729 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:06:37" (1/1) ... [2018-11-07 20:06:37,870 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:06:37" (1/1) ... [2018-11-07 20:06:37,887 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-07 20:06:37,887 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-07 20:06:37,887 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-07 20:06:37,888 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-07 20:06:37,899 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:06:37" (1/1) ... [2018-11-07 20:06:37,899 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:06:37" (1/1) ... [2018-11-07 20:06:37,908 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:06:37" (1/1) ... [2018-11-07 20:06:37,909 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:06:37" (1/1) ... [2018-11-07 20:06:37,965 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:06:37" (1/1) ... [2018-11-07 20:06:37,979 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:06:37" (1/1) ... [2018-11-07 20:06:37,990 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:06:37" (1/1) ... [2018-11-07 20:06:38,011 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-07 20:06:38,011 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-07 20:06:38,012 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-07 20:06:38,012 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-07 20:06:38,013 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:06:37" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-07 20:06:38,087 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-11-07 20:06:38,087 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-07 20:06:38,087 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-07 20:06:38,088 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-11-07 20:06:38,088 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-11-07 20:06:38,088 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-07 20:06:38,088 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-07 20:06:38,089 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-07 20:06:38,089 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-07 20:06:43,165 INFO L276 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-07 20:06:43,166 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 08:06:43 BoogieIcfgContainer [2018-11-07 20:06:43,166 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-07 20:06:43,167 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-07 20:06:43,167 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-07 20:06:43,171 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-07 20:06:43,171 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 08:06:36" (1/3) ... [2018-11-07 20:06:43,172 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11154e82 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 08:06:43, skipping insertion in model container [2018-11-07 20:06:43,172 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:06:37" (2/3) ... [2018-11-07 20:06:43,172 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11154e82 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 08:06:43, skipping insertion in model container [2018-11-07 20:06:43,173 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 08:06:43" (3/3) ... [2018-11-07 20:06:43,174 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem11_label12_true-unreach-call.c [2018-11-07 20:06:43,184 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-07 20:06:43,193 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-07 20:06:43,210 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-07 20:06:43,251 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-07 20:06:43,252 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-07 20:06:43,252 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-07 20:06:43,252 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-07 20:06:43,252 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-07 20:06:43,252 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-07 20:06:43,252 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-07 20:06:43,253 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-07 20:06:43,283 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states. [2018-11-07 20:06:43,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-11-07 20:06:43,292 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 20:06:43,293 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 20:06:43,295 INFO L423 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 20:06:43,301 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:06:43,302 INFO L82 PathProgramCache]: Analyzing trace with hash -1691247764, now seen corresponding path program 1 times [2018-11-07 20:06:43,305 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 20:06:43,354 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:06:43,354 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:06:43,354 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:06:43,354 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 20:06:43,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:06:43,702 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 20:06:43,704 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 20:06:43,705 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-07 20:06:43,705 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 20:06:43,713 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-07 20:06:43,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-07 20:06:43,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-07 20:06:43,731 INFO L87 Difference]: Start difference. First operand 293 states. Second operand 3 states. [2018-11-07 20:06:46,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 20:06:46,291 INFO L93 Difference]: Finished difference Result 790 states and 1382 transitions. [2018-11-07 20:06:46,293 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-07 20:06:46,294 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 32 [2018-11-07 20:06:46,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 20:06:46,314 INFO L225 Difference]: With dead ends: 790 [2018-11-07 20:06:46,314 INFO L226 Difference]: Without dead ends: 495 [2018-11-07 20:06:46,323 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-07 20:06:46,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2018-11-07 20:06:46,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 488. [2018-11-07 20:06:46,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 488 states. [2018-11-07 20:06:46,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 488 states to 488 states and 849 transitions. [2018-11-07 20:06:46,428 INFO L78 Accepts]: Start accepts. Automaton has 488 states and 849 transitions. Word has length 32 [2018-11-07 20:06:46,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 20:06:46,429 INFO L480 AbstractCegarLoop]: Abstraction has 488 states and 849 transitions. [2018-11-07 20:06:46,429 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-07 20:06:46,431 INFO L276 IsEmpty]: Start isEmpty. Operand 488 states and 849 transitions. [2018-11-07 20:06:46,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-11-07 20:06:46,440 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 20:06:46,441 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 20:06:46,441 INFO L423 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 20:06:46,443 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:06:46,444 INFO L82 PathProgramCache]: Analyzing trace with hash -904835348, now seen corresponding path program 1 times [2018-11-07 20:06:46,444 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 20:06:46,445 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:06:46,446 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:06:46,446 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:06:46,446 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 20:06:46,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:06:46,980 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 20:06:46,980 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 20:06:46,980 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-07 20:06:46,981 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 20:06:46,982 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-07 20:06:46,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-07 20:06:46,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-07 20:06:46,983 INFO L87 Difference]: Start difference. First operand 488 states and 849 transitions. Second operand 5 states. [2018-11-07 20:06:51,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 20:06:51,528 INFO L93 Difference]: Finished difference Result 1731 states and 3162 transitions. [2018-11-07 20:06:51,533 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-07 20:06:51,533 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 108 [2018-11-07 20:06:51,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 20:06:51,544 INFO L225 Difference]: With dead ends: 1731 [2018-11-07 20:06:51,544 INFO L226 Difference]: Without dead ends: 1249 [2018-11-07 20:06:51,550 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-11-07 20:06:51,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1249 states. [2018-11-07 20:06:51,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1249 to 1032. [2018-11-07 20:06:51,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1032 states. [2018-11-07 20:06:51,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1032 states to 1032 states and 1658 transitions. [2018-11-07 20:06:51,632 INFO L78 Accepts]: Start accepts. Automaton has 1032 states and 1658 transitions. Word has length 108 [2018-11-07 20:06:51,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 20:06:51,633 INFO L480 AbstractCegarLoop]: Abstraction has 1032 states and 1658 transitions. [2018-11-07 20:06:51,633 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-07 20:06:51,633 INFO L276 IsEmpty]: Start isEmpty. Operand 1032 states and 1658 transitions. [2018-11-07 20:06:51,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2018-11-07 20:06:51,642 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 20:06:51,645 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 20:06:51,645 INFO L423 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 20:06:51,645 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:06:51,646 INFO L82 PathProgramCache]: Analyzing trace with hash 1745515455, now seen corresponding path program 1 times [2018-11-07 20:06:51,646 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 20:06:51,647 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:06:51,647 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:06:51,647 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:06:51,648 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 20:06:51,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:06:51,892 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 20:06:51,892 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 20:06:51,892 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-07 20:06:51,892 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 20:06:51,893 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-07 20:06:51,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-07 20:06:51,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-07 20:06:51,894 INFO L87 Difference]: Start difference. First operand 1032 states and 1658 transitions. Second operand 5 states. [2018-11-07 20:06:55,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 20:06:55,795 INFO L93 Difference]: Finished difference Result 3651 states and 6065 transitions. [2018-11-07 20:06:55,800 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-07 20:06:55,800 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 119 [2018-11-07 20:06:55,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 20:06:55,821 INFO L225 Difference]: With dead ends: 3651 [2018-11-07 20:06:55,821 INFO L226 Difference]: Without dead ends: 2625 [2018-11-07 20:06:55,830 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-11-07 20:06:55,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2625 states. [2018-11-07 20:06:55,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2625 to 2592. [2018-11-07 20:06:55,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2592 states. [2018-11-07 20:06:55,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2592 states to 2592 states and 3711 transitions. [2018-11-07 20:06:55,911 INFO L78 Accepts]: Start accepts. Automaton has 2592 states and 3711 transitions. Word has length 119 [2018-11-07 20:06:55,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 20:06:55,911 INFO L480 AbstractCegarLoop]: Abstraction has 2592 states and 3711 transitions. [2018-11-07 20:06:55,912 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-07 20:06:55,912 INFO L276 IsEmpty]: Start isEmpty. Operand 2592 states and 3711 transitions. [2018-11-07 20:06:55,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2018-11-07 20:06:55,917 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 20:06:55,918 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 20:06:55,918 INFO L423 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 20:06:55,918 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:06:55,919 INFO L82 PathProgramCache]: Analyzing trace with hash -691970105, now seen corresponding path program 1 times [2018-11-07 20:06:55,919 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 20:06:55,920 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:06:55,920 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:06:55,920 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:06:55,920 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 20:06:55,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:06:56,285 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 19 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 20:06:56,286 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 20:06:56,286 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 20:06:56,287 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 165 with the following transitions: [2018-11-07 20:06:56,296 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [157], [159], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [626], [630], [634], [638], [642], [646], [650], [654], [658], [662], [666], [677], [688], [692], [696], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [762], [766], [769], [772], [776], [1084], [1088], [1092], [1098], [1102], [1104], [1109], [1110], [1111], [1113], [1114] [2018-11-07 20:06:56,356 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 20:06:56,356 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 20:06:57,086 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 20:06:58,514 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 20:06:58,515 INFO L272 AbstractInterpreter]: Visited 140 different actions 406 times. Merged at 5 different actions 9 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 28 variables. [2018-11-07 20:06:58,562 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:06:58,564 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 20:06:58,564 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 20:06:58,564 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 20:06:58,581 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:06:58,581 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 20:06:58,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:06:58,724 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 20:06:58,943 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 20:06:58,943 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 20:06:59,514 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 20:06:59,548 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-11-07 20:06:59,549 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [8] total 9 [2018-11-07 20:06:59,549 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 20:06:59,550 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-07 20:06:59,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-07 20:06:59,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2018-11-07 20:06:59,551 INFO L87 Difference]: Start difference. First operand 2592 states and 3711 transitions. Second operand 3 states. [2018-11-07 20:07:03,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 20:07:03,893 INFO L93 Difference]: Finished difference Result 5974 states and 8797 transitions. [2018-11-07 20:07:03,893 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-07 20:07:03,893 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 164 [2018-11-07 20:07:03,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 20:07:03,912 INFO L225 Difference]: With dead ends: 5974 [2018-11-07 20:07:03,913 INFO L226 Difference]: Without dead ends: 3388 [2018-11-07 20:07:03,924 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 328 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2018-11-07 20:07:03,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3388 states. [2018-11-07 20:07:04,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3388 to 3192. [2018-11-07 20:07:04,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3192 states. [2018-11-07 20:07:04,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3192 states to 3192 states and 4542 transitions. [2018-11-07 20:07:04,017 INFO L78 Accepts]: Start accepts. Automaton has 3192 states and 4542 transitions. Word has length 164 [2018-11-07 20:07:04,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 20:07:04,018 INFO L480 AbstractCegarLoop]: Abstraction has 3192 states and 4542 transitions. [2018-11-07 20:07:04,018 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-07 20:07:04,019 INFO L276 IsEmpty]: Start isEmpty. Operand 3192 states and 4542 transitions. [2018-11-07 20:07:04,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2018-11-07 20:07:04,023 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 20:07:04,023 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-11-07 20:07:04,024 INFO L423 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 20:07:04,024 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:07:04,024 INFO L82 PathProgramCache]: Analyzing trace with hash 3845995, now seen corresponding path program 1 times [2018-11-07 20:07:04,024 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 20:07:04,027 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:07:04,027 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:07:04,027 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:07:04,027 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 20:07:04,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:07:04,348 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 50 proven. 68 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-07 20:07:04,348 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 20:07:04,349 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 20:07:04,349 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 190 with the following transitions: [2018-11-07 20:07:04,349 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [157], [159], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [506], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [550], [1084], [1088], [1092], [1098], [1102], [1104], [1109], [1110], [1111], [1113], [1114] [2018-11-07 20:07:04,354 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 20:07:04,354 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 20:07:04,481 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 20:07:04,482 INFO L272 AbstractInterpreter]: Visited 89 different actions 89 times. Never merged. Never widened. Never found a fixpoint. Largest state had 28 variables. [2018-11-07 20:07:04,519 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:07:04,520 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 20:07:04,934 INFO L227 lantSequenceWeakener]: Weakened 180 states. On average, predicates are now at 73.21% of their original sizes. [2018-11-07 20:07:04,934 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 20:07:05,298 INFO L415 sIntCurrentIteration]: We unified 188 AI predicates to 188 [2018-11-07 20:07:05,299 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 20:07:05,300 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 20:07:05,300 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [6] total 11 [2018-11-07 20:07:05,300 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 20:07:05,301 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-07 20:07:05,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-07 20:07:05,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2018-11-07 20:07:05,302 INFO L87 Difference]: Start difference. First operand 3192 states and 4542 transitions. Second operand 7 states. [2018-11-07 20:07:08,059 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 20:07:23,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 20:07:23,383 INFO L93 Difference]: Finished difference Result 6570 states and 9298 transitions. [2018-11-07 20:07:23,383 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-07 20:07:23,383 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 189 [2018-11-07 20:07:23,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 20:07:23,399 INFO L225 Difference]: With dead ends: 6570 [2018-11-07 20:07:23,399 INFO L226 Difference]: Without dead ends: 3384 [2018-11-07 20:07:23,408 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 189 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2018-11-07 20:07:23,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3384 states. [2018-11-07 20:07:23,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3384 to 3382. [2018-11-07 20:07:23,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3382 states. [2018-11-07 20:07:23,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3382 states to 3382 states and 4741 transitions. [2018-11-07 20:07:23,484 INFO L78 Accepts]: Start accepts. Automaton has 3382 states and 4741 transitions. Word has length 189 [2018-11-07 20:07:23,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 20:07:23,484 INFO L480 AbstractCegarLoop]: Abstraction has 3382 states and 4741 transitions. [2018-11-07 20:07:23,484 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-07 20:07:23,484 INFO L276 IsEmpty]: Start isEmpty. Operand 3382 states and 4741 transitions. [2018-11-07 20:07:23,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2018-11-07 20:07:23,491 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 20:07:23,491 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-11-07 20:07:23,491 INFO L423 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 20:07:23,492 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:07:23,492 INFO L82 PathProgramCache]: Analyzing trace with hash -675260711, now seen corresponding path program 1 times [2018-11-07 20:07:23,492 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 20:07:23,495 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:07:23,495 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:07:23,495 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:07:23,495 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 20:07:23,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:07:24,234 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 55 proven. 98 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-07 20:07:24,234 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 20:07:24,234 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 20:07:24,235 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 270 with the following transitions: [2018-11-07 20:07:24,235 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [157], [159], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [626], [630], [634], [638], [641], [642], [646], [650], [654], [658], [662], [666], [677], [688], [692], [696], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [762], [766], [769], [772], [776], [1084], [1088], [1092], [1098], [1102], [1104], [1109], [1110], [1111], [1113], [1114] [2018-11-07 20:07:24,240 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 20:07:24,241 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 20:07:24,355 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 20:07:25,008 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 20:07:25,009 INFO L272 AbstractInterpreter]: Visited 141 different actions 554 times. Merged at 7 different actions 24 times. Never widened. Found 4 fixpoints after 2 different actions. Largest state had 28 variables. [2018-11-07 20:07:25,018 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:07:25,018 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 20:07:25,018 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 20:07:25,018 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 20:07:25,026 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:07:25,027 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 20:07:25,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:07:25,116 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 20:07:25,366 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 55 proven. 2 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2018-11-07 20:07:25,367 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 20:07:25,520 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-11-07 20:07:26,399 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 55 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 20:07:26,430 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 20:07:26,430 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 14 [2018-11-07 20:07:26,430 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 20:07:26,431 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-07 20:07:26,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-07 20:07:26,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2018-11-07 20:07:26,433 INFO L87 Difference]: Start difference. First operand 3382 states and 4741 transitions. Second operand 9 states. [2018-11-07 20:07:32,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 20:07:32,453 INFO L93 Difference]: Finished difference Result 12942 states and 19862 transitions. [2018-11-07 20:07:32,454 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-11-07 20:07:32,454 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 269 [2018-11-07 20:07:32,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 20:07:32,511 INFO L225 Difference]: With dead ends: 12942 [2018-11-07 20:07:32,511 INFO L226 Difference]: Without dead ends: 9756 [2018-11-07 20:07:32,540 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 560 GetRequests, 534 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=195, Invalid=455, Unknown=0, NotChecked=0, Total=650 [2018-11-07 20:07:32,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9756 states. [2018-11-07 20:07:32,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9756 to 9532. [2018-11-07 20:07:32,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9532 states. [2018-11-07 20:07:32,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9532 states to 9532 states and 13361 transitions. [2018-11-07 20:07:32,809 INFO L78 Accepts]: Start accepts. Automaton has 9532 states and 13361 transitions. Word has length 269 [2018-11-07 20:07:32,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 20:07:32,810 INFO L480 AbstractCegarLoop]: Abstraction has 9532 states and 13361 transitions. [2018-11-07 20:07:32,810 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-07 20:07:32,810 INFO L276 IsEmpty]: Start isEmpty. Operand 9532 states and 13361 transitions. [2018-11-07 20:07:32,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 307 [2018-11-07 20:07:32,824 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 20:07:32,825 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 20:07:32,825 INFO L423 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 20:07:32,825 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:07:32,825 INFO L82 PathProgramCache]: Analyzing trace with hash -1695218910, now seen corresponding path program 1 times [2018-11-07 20:07:32,825 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 20:07:32,826 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:07:32,826 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:07:32,827 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:07:32,827 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 20:07:32,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:07:33,276 INFO L134 CoverageAnalysis]: Checked inductivity of 305 backedges. 151 proven. 72 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2018-11-07 20:07:33,277 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 20:07:33,277 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 20:07:33,277 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 307 with the following transitions: [2018-11-07 20:07:33,278 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [157], [159], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [506], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [550], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [626], [630], [634], [638], [642], [646], [650], [654], [658], [662], [666], [677], [688], [692], [696], [707], [710], [1084], [1088], [1092], [1098], [1102], [1104], [1109], [1110], [1111], [1113], [1114] [2018-11-07 20:07:33,281 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 20:07:33,282 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 20:07:33,376 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 20:07:33,493 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 20:07:33,494 INFO L272 AbstractInterpreter]: Visited 126 different actions 246 times. Merged at 5 different actions 5 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 28 variables. [2018-11-07 20:07:33,506 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:07:33,506 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 20:07:33,920 INFO L227 lantSequenceWeakener]: Weakened 303 states. On average, predicates are now at 73.23% of their original sizes. [2018-11-07 20:07:33,921 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 20:07:34,460 INFO L415 sIntCurrentIteration]: We unified 305 AI predicates to 305 [2018-11-07 20:07:34,461 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 20:07:34,461 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 20:07:34,461 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [6] total 15 [2018-11-07 20:07:34,462 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 20:07:34,462 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-07 20:07:34,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-07 20:07:34,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2018-11-07 20:07:34,463 INFO L87 Difference]: Start difference. First operand 9532 states and 13361 transitions. Second operand 11 states. [2018-11-07 20:07:51,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 20:07:51,825 INFO L93 Difference]: Finished difference Result 18873 states and 26571 transitions. [2018-11-07 20:07:51,825 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-11-07 20:07:51,825 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 306 [2018-11-07 20:07:51,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 20:07:51,879 INFO L225 Difference]: With dead ends: 18873 [2018-11-07 20:07:51,879 INFO L226 Difference]: Without dead ends: 9727 [2018-11-07 20:07:51,912 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 314 GetRequests, 296 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=98, Invalid=282, Unknown=0, NotChecked=0, Total=380 [2018-11-07 20:07:51,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9727 states. [2018-11-07 20:07:52,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9727 to 9723. [2018-11-07 20:07:52,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9723 states. [2018-11-07 20:07:52,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9723 states to 9723 states and 13571 transitions. [2018-11-07 20:07:52,132 INFO L78 Accepts]: Start accepts. Automaton has 9723 states and 13571 transitions. Word has length 306 [2018-11-07 20:07:52,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 20:07:52,133 INFO L480 AbstractCegarLoop]: Abstraction has 9723 states and 13571 transitions. [2018-11-07 20:07:52,133 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-07 20:07:52,133 INFO L276 IsEmpty]: Start isEmpty. Operand 9723 states and 13571 transitions. [2018-11-07 20:07:52,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 313 [2018-11-07 20:07:52,148 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 20:07:52,149 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 20:07:52,149 INFO L423 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 20:07:52,149 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:07:52,149 INFO L82 PathProgramCache]: Analyzing trace with hash 1526248372, now seen corresponding path program 1 times [2018-11-07 20:07:52,150 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 20:07:52,150 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:07:52,150 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:07:52,151 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:07:52,151 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 20:07:52,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:07:52,526 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 178 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 20:07:52,526 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 20:07:52,526 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 20:07:52,527 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 313 with the following transitions: [2018-11-07 20:07:52,527 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [157], [159], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [626], [630], [634], [638], [642], [646], [650], [654], [658], [662], [666], [677], [688], [692], [696], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [762], [766], [769], [772], [776], [777], [781], [785], [789], [793], [797], [808], [812], [816], [820], [824], [828], [832], [843], [847], [851], [854], [857], [861], [1084], [1088], [1092], [1098], [1102], [1104], [1109], [1110], [1111], [1113], [1114] [2018-11-07 20:07:52,531 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 20:07:52,531 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 20:07:52,643 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 20:07:53,158 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 20:07:53,158 INFO L272 AbstractInterpreter]: Visited 157 different actions 457 times. Merged at 5 different actions 9 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 28 variables. [2018-11-07 20:07:53,180 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:07:53,180 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 20:07:53,180 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 20:07:53,180 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 20:07:53,189 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:07:53,189 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 20:07:53,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:07:53,287 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 20:07:53,347 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2018-11-07 20:07:53,347 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 20:07:53,546 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2018-11-07 20:07:53,567 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-11-07 20:07:53,567 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 8 [2018-11-07 20:07:53,567 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 20:07:53,568 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-07 20:07:53,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-07 20:07:53,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2018-11-07 20:07:53,568 INFO L87 Difference]: Start difference. First operand 9723 states and 13571 transitions. Second operand 3 states. [2018-11-07 20:07:55,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 20:07:55,339 INFO L93 Difference]: Finished difference Result 23050 states and 33573 transitions. [2018-11-07 20:07:55,342 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-07 20:07:55,342 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 312 [2018-11-07 20:07:55,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 20:07:55,402 INFO L225 Difference]: With dead ends: 23050 [2018-11-07 20:07:55,402 INFO L226 Difference]: Without dead ends: 13714 [2018-11-07 20:07:55,444 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 629 GetRequests, 623 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2018-11-07 20:07:55,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13714 states. [2018-11-07 20:07:55,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13714 to 13654. [2018-11-07 20:07:55,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13654 states. [2018-11-07 20:07:55,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13654 states to 13654 states and 18679 transitions. [2018-11-07 20:07:55,770 INFO L78 Accepts]: Start accepts. Automaton has 13654 states and 18679 transitions. Word has length 312 [2018-11-07 20:07:55,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 20:07:55,771 INFO L480 AbstractCegarLoop]: Abstraction has 13654 states and 18679 transitions. [2018-11-07 20:07:55,771 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-07 20:07:55,771 INFO L276 IsEmpty]: Start isEmpty. Operand 13654 states and 18679 transitions. [2018-11-07 20:07:55,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 317 [2018-11-07 20:07:55,804 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 20:07:55,804 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 20:07:55,805 INFO L423 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 20:07:55,805 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:07:55,805 INFO L82 PathProgramCache]: Analyzing trace with hash -1502346986, now seen corresponding path program 1 times [2018-11-07 20:07:55,805 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 20:07:55,806 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:07:55,806 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:07:55,806 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:07:55,808 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 20:07:55,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:07:56,396 INFO L134 CoverageAnalysis]: Checked inductivity of 305 backedges. 151 proven. 72 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2018-11-07 20:07:56,396 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 20:07:56,397 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 20:07:56,397 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 317 with the following transitions: [2018-11-07 20:07:56,397 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [157], [159], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [506], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [550], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [626], [630], [634], [638], [642], [646], [650], [654], [658], [662], [666], [677], [688], [692], [696], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [750], [1084], [1088], [1092], [1098], [1102], [1104], [1109], [1110], [1111], [1113], [1114] [2018-11-07 20:07:56,401 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 20:07:56,402 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 20:07:56,509 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 20:07:56,738 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 20:07:56,739 INFO L272 AbstractInterpreter]: Visited 136 different actions 395 times. Merged at 5 different actions 9 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 28 variables. [2018-11-07 20:07:56,747 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:07:56,747 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 20:07:57,545 INFO L227 lantSequenceWeakener]: Weakened 313 states. On average, predicates are now at 73.22% of their original sizes. [2018-11-07 20:07:57,546 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 20:07:58,033 INFO L415 sIntCurrentIteration]: We unified 315 AI predicates to 315 [2018-11-07 20:07:58,033 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 20:07:58,033 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 20:07:58,033 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [6] total 15 [2018-11-07 20:07:58,033 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 20:07:58,034 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-07 20:07:58,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-07 20:07:58,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2018-11-07 20:07:58,034 INFO L87 Difference]: Start difference. First operand 13654 states and 18679 transitions. Second operand 11 states. [2018-11-07 20:08:11,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 20:08:11,696 INFO L93 Difference]: Finished difference Result 27123 states and 37292 transitions. [2018-11-07 20:08:11,696 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-11-07 20:08:11,696 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 316 [2018-11-07 20:08:11,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 20:08:11,750 INFO L225 Difference]: With dead ends: 27123 [2018-11-07 20:08:11,750 INFO L226 Difference]: Without dead ends: 14045 [2018-11-07 20:08:11,779 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 325 GetRequests, 306 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=106, Invalid=314, Unknown=0, NotChecked=0, Total=420 [2018-11-07 20:08:11,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14045 states. [2018-11-07 20:08:12,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14045 to 14039. [2018-11-07 20:08:12,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14039 states. [2018-11-07 20:08:12,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14039 states to 14039 states and 19132 transitions. [2018-11-07 20:08:12,052 INFO L78 Accepts]: Start accepts. Automaton has 14039 states and 19132 transitions. Word has length 316 [2018-11-07 20:08:12,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 20:08:12,052 INFO L480 AbstractCegarLoop]: Abstraction has 14039 states and 19132 transitions. [2018-11-07 20:08:12,053 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-07 20:08:12,053 INFO L276 IsEmpty]: Start isEmpty. Operand 14039 states and 19132 transitions. [2018-11-07 20:08:12,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2018-11-07 20:08:12,077 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 20:08:12,077 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 20:08:12,077 INFO L423 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 20:08:12,078 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:08:12,078 INFO L82 PathProgramCache]: Analyzing trace with hash -138640566, now seen corresponding path program 1 times [2018-11-07 20:08:12,078 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 20:08:12,079 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:08:12,079 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:08:12,080 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:08:12,080 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 20:08:12,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:08:12,756 INFO L134 CoverageAnalysis]: Checked inductivity of 328 backedges. 240 proven. 81 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-11-07 20:08:12,757 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 20:08:12,757 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 20:08:12,757 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 319 with the following transitions: [2018-11-07 20:08:12,757 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [157], [159], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [550], [551], [554], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [626], [630], [634], [638], [642], [646], [650], [654], [658], [662], [666], [677], [688], [692], [696], [707], [710], [1084], [1088], [1092], [1098], [1102], [1104], [1109], [1110], [1111], [1113], [1114] [2018-11-07 20:08:12,760 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 20:08:12,760 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 20:08:12,906 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 20:08:13,299 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 20:08:13,299 INFO L272 AbstractInterpreter]: Visited 126 different actions 497 times. Merged at 7 different actions 26 times. Never widened. Found 4 fixpoints after 3 different actions. Largest state had 28 variables. [2018-11-07 20:08:13,305 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:08:13,305 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 20:08:13,715 INFO L227 lantSequenceWeakener]: Weakened 315 states. On average, predicates are now at 75.13% of their original sizes. [2018-11-07 20:08:13,715 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 20:08:13,803 INFO L415 sIntCurrentIteration]: We unified 317 AI predicates to 317 [2018-11-07 20:08:13,803 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 20:08:13,803 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 20:08:13,804 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [6] total 14 [2018-11-07 20:08:13,804 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 20:08:13,804 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-07 20:08:13,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-07 20:08:13,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2018-11-07 20:08:13,805 INFO L87 Difference]: Start difference. First operand 14039 states and 19132 transitions. Second operand 10 states. [2018-11-07 20:08:26,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 20:08:26,572 INFO L93 Difference]: Finished difference Result 29009 states and 40044 transitions. [2018-11-07 20:08:26,573 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-11-07 20:08:26,573 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 318 [2018-11-07 20:08:26,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 20:08:26,628 INFO L225 Difference]: With dead ends: 29009 [2018-11-07 20:08:26,629 INFO L226 Difference]: Without dead ends: 15931 [2018-11-07 20:08:26,667 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 324 GetRequests, 309 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2018-11-07 20:08:26,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15931 states. [2018-11-07 20:08:26,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15931 to 15887. [2018-11-07 20:08:26,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15887 states. [2018-11-07 20:08:26,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15887 states to 15887 states and 21443 transitions. [2018-11-07 20:08:26,997 INFO L78 Accepts]: Start accepts. Automaton has 15887 states and 21443 transitions. Word has length 318 [2018-11-07 20:08:26,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 20:08:26,998 INFO L480 AbstractCegarLoop]: Abstraction has 15887 states and 21443 transitions. [2018-11-07 20:08:26,998 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-07 20:08:26,999 INFO L276 IsEmpty]: Start isEmpty. Operand 15887 states and 21443 transitions. [2018-11-07 20:08:27,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2018-11-07 20:08:27,028 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 20:08:27,028 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 20:08:27,028 INFO L423 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 20:08:27,028 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:08:27,029 INFO L82 PathProgramCache]: Analyzing trace with hash -1851853725, now seen corresponding path program 1 times [2018-11-07 20:08:27,029 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 20:08:27,030 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:08:27,030 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:08:27,030 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:08:27,030 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 20:08:27,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:08:27,525 INFO L134 CoverageAnalysis]: Checked inductivity of 299 backedges. 230 proven. 2 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2018-11-07 20:08:27,526 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 20:08:27,526 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 20:08:27,526 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 319 with the following transitions: [2018-11-07 20:08:27,527 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [157], [159], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [494], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [550], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [626], [630], [634], [638], [642], [646], [650], [654], [658], [662], [666], [677], [688], [692], [696], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [762], [766], [769], [772], [776], [1084], [1088], [1092], [1098], [1102], [1104], [1109], [1110], [1111], [1113], [1114] [2018-11-07 20:08:27,529 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 20:08:27,530 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 20:08:27,635 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 20:08:28,966 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 20:08:28,966 INFO L272 AbstractInterpreter]: Visited 142 different actions 558 times. Merged at 7 different actions 24 times. Never widened. Found 4 fixpoints after 2 different actions. Largest state had 28 variables. [2018-11-07 20:08:28,973 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:08:28,973 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 20:08:28,973 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 20:08:28,973 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 20:08:28,983 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:08:28,984 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 20:08:29,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:08:29,086 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 20:08:29,170 INFO L134 CoverageAnalysis]: Checked inductivity of 299 backedges. 230 proven. 2 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2018-11-07 20:08:29,171 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 20:08:29,487 INFO L134 CoverageAnalysis]: Checked inductivity of 299 backedges. 230 proven. 2 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2018-11-07 20:08:29,517 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 20:08:29,518 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 8 [2018-11-07 20:08:29,518 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 20:08:29,519 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-07 20:08:29,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-07 20:08:29,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2018-11-07 20:08:29,520 INFO L87 Difference]: Start difference. First operand 15887 states and 21443 transitions. Second operand 7 states. [2018-11-07 20:08:31,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 20:08:31,337 INFO L93 Difference]: Finished difference Result 27908 states and 39298 transitions. [2018-11-07 20:08:31,337 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-07 20:08:31,337 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 318 [2018-11-07 20:08:31,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 20:08:31,393 INFO L225 Difference]: With dead ends: 27908 [2018-11-07 20:08:31,393 INFO L226 Difference]: Without dead ends: 14830 [2018-11-07 20:08:31,436 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 645 GetRequests, 636 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2018-11-07 20:08:31,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14830 states. [2018-11-07 20:08:31,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14830 to 14331. [2018-11-07 20:08:31,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14331 states. [2018-11-07 20:08:31,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14331 states to 14331 states and 17969 transitions. [2018-11-07 20:08:31,716 INFO L78 Accepts]: Start accepts. Automaton has 14331 states and 17969 transitions. Word has length 318 [2018-11-07 20:08:31,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 20:08:31,716 INFO L480 AbstractCegarLoop]: Abstraction has 14331 states and 17969 transitions. [2018-11-07 20:08:31,716 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-07 20:08:31,717 INFO L276 IsEmpty]: Start isEmpty. Operand 14331 states and 17969 transitions. [2018-11-07 20:08:31,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2018-11-07 20:08:31,739 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 20:08:31,740 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 20:08:31,740 INFO L423 AbstractCegarLoop]: === Iteration 12 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 20:08:31,740 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:08:31,741 INFO L82 PathProgramCache]: Analyzing trace with hash -385892453, now seen corresponding path program 1 times [2018-11-07 20:08:31,741 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 20:08:31,741 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:08:31,742 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:08:31,742 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:08:31,742 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 20:08:31,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:08:32,062 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 8 DAG size of output: 5 [2018-11-07 20:08:32,130 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2018-11-07 20:08:32,130 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 20:08:32,130 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-07 20:08:32,131 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 20:08:32,131 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-07 20:08:32,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-07 20:08:32,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 20:08:32,132 INFO L87 Difference]: Start difference. First operand 14331 states and 17969 transitions. Second operand 4 states. [2018-11-07 20:08:34,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 20:08:34,712 INFO L93 Difference]: Finished difference Result 31541 states and 41543 transitions. [2018-11-07 20:08:34,712 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-07 20:08:34,712 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 322 [2018-11-07 20:08:34,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 20:08:34,762 INFO L225 Difference]: With dead ends: 31541 [2018-11-07 20:08:34,762 INFO L226 Difference]: Without dead ends: 18753 [2018-11-07 20:08:34,811 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 20:08:34,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18753 states. [2018-11-07 20:08:35,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18753 to 17964. [2018-11-07 20:08:35,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17964 states. [2018-11-07 20:08:35,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17964 states to 17964 states and 22817 transitions. [2018-11-07 20:08:35,151 INFO L78 Accepts]: Start accepts. Automaton has 17964 states and 22817 transitions. Word has length 322 [2018-11-07 20:08:35,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 20:08:35,152 INFO L480 AbstractCegarLoop]: Abstraction has 17964 states and 22817 transitions. [2018-11-07 20:08:35,152 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-07 20:08:35,152 INFO L276 IsEmpty]: Start isEmpty. Operand 17964 states and 22817 transitions. [2018-11-07 20:08:35,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 352 [2018-11-07 20:08:35,187 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 20:08:35,188 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 20:08:35,188 INFO L423 AbstractCegarLoop]: === Iteration 13 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 20:08:35,188 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:08:35,189 INFO L82 PathProgramCache]: Analyzing trace with hash 909086806, now seen corresponding path program 1 times [2018-11-07 20:08:35,189 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 20:08:35,190 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:08:35,190 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:08:35,190 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:08:35,190 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 20:08:35,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:08:37,375 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 105 proven. 145 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2018-11-07 20:08:37,376 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 20:08:37,376 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 20:08:37,376 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 352 with the following transitions: [2018-11-07 20:08:37,377 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [157], [159], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [562], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [626], [630], [634], [638], [641], [642], [646], [650], [654], [658], [662], [666], [677], [688], [692], [696], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [750], [1084], [1088], [1092], [1098], [1102], [1104], [1109], [1110], [1111], [1113], [1114] [2018-11-07 20:08:37,379 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 20:08:37,380 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 20:08:37,528 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 20:08:38,283 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 20:08:38,283 INFO L272 AbstractInterpreter]: Visited 137 different actions 679 times. Merged at 8 different actions 40 times. Widened at 1 different actions 1 times. Found 8 fixpoints after 3 different actions. Largest state had 28 variables. [2018-11-07 20:08:38,291 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:08:38,291 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 20:08:38,291 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 20:08:38,291 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 20:08:38,300 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:08:38,300 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 20:08:38,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:08:38,401 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 20:08:38,968 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 268 proven. 2 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2018-11-07 20:08:38,969 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 20:08:39,436 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 268 proven. 2 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2018-11-07 20:08:39,457 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 20:08:39,457 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 5, 5] total 17 [2018-11-07 20:08:39,457 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 20:08:39,458 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-11-07 20:08:39,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-11-07 20:08:39,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2018-11-07 20:08:39,458 INFO L87 Difference]: Start difference. First operand 17964 states and 22817 transitions. Second operand 15 states. [2018-11-07 20:09:01,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 20:09:01,772 INFO L93 Difference]: Finished difference Result 79085 states and 120900 transitions. [2018-11-07 20:09:01,772 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2018-11-07 20:09:01,773 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 351 [2018-11-07 20:09:01,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 20:09:02,015 INFO L225 Difference]: With dead ends: 79085 [2018-11-07 20:09:02,016 INFO L226 Difference]: Without dead ends: 61696 [2018-11-07 20:09:02,134 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 926 GetRequests, 802 SyntacticMatches, 0 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6116 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=2152, Invalid=13598, Unknown=0, NotChecked=0, Total=15750 [2018-11-07 20:09:02,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61696 states. [2018-11-07 20:09:03,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61696 to 57904. [2018-11-07 20:09:03,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57904 states. [2018-11-07 20:09:03,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57904 states to 57904 states and 74463 transitions. [2018-11-07 20:09:03,360 INFO L78 Accepts]: Start accepts. Automaton has 57904 states and 74463 transitions. Word has length 351 [2018-11-07 20:09:03,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 20:09:03,361 INFO L480 AbstractCegarLoop]: Abstraction has 57904 states and 74463 transitions. [2018-11-07 20:09:03,361 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-11-07 20:09:03,361 INFO L276 IsEmpty]: Start isEmpty. Operand 57904 states and 74463 transitions. [2018-11-07 20:09:03,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 482 [2018-11-07 20:09:03,495 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 20:09:03,495 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 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] [2018-11-07 20:09:03,496 INFO L423 AbstractCegarLoop]: === Iteration 14 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 20:09:03,496 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:09:03,496 INFO L82 PathProgramCache]: Analyzing trace with hash 2141386509, now seen corresponding path program 1 times [2018-11-07 20:09:03,496 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 20:09:03,497 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:09:03,497 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:09:03,498 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:09:03,498 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 20:09:03,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:09:03,952 INFO L134 CoverageAnalysis]: Checked inductivity of 680 backedges. 373 proven. 23 refuted. 0 times theorem prover too weak. 284 trivial. 0 not checked. [2018-11-07 20:09:03,952 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 20:09:03,952 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 20:09:03,953 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 482 with the following transitions: [2018-11-07 20:09:03,953 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [157], [159], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [534], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [626], [630], [634], [638], [641], [642], [646], [650], [654], [658], [662], [666], [677], [688], [692], [696], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [762], [766], [769], [772], [776], [777], [781], [784], [1084], [1088], [1092], [1098], [1102], [1104], [1109], [1110], [1111], [1113], [1114] [2018-11-07 20:09:03,956 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 20:09:03,956 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 20:09:04,032 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 20:09:05,583 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 20:09:05,583 INFO L272 AbstractInterpreter]: Visited 145 different actions 1023 times. Merged at 9 different actions 75 times. Widened at 1 different actions 2 times. Found 19 fixpoints after 3 different actions. Largest state had 28 variables. [2018-11-07 20:09:05,595 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:09:05,595 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 20:09:05,595 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 20:09:05,595 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-11-07 20:09:05,604 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:09:05,605 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 20:09:05,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:09:05,744 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 20:09:05,901 INFO L134 CoverageAnalysis]: Checked inductivity of 680 backedges. 575 proven. 2 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2018-11-07 20:09:05,901 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 20:09:06,216 INFO L134 CoverageAnalysis]: Checked inductivity of 680 backedges. 321 proven. 104 refuted. 0 times theorem prover too weak. 255 trivial. 0 not checked. [2018-11-07 20:09:06,236 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 20:09:06,237 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 12 [2018-11-07 20:09:06,237 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 20:09:06,238 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-07 20:09:06,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-07 20:09:06,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2018-11-07 20:09:06,239 INFO L87 Difference]: Start difference. First operand 57904 states and 74463 transitions. Second operand 10 states. [2018-11-07 20:09:25,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 20:09:25,098 INFO L93 Difference]: Finished difference Result 153029 states and 236506 transitions. [2018-11-07 20:09:25,098 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-11-07 20:09:25,098 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 481 [2018-11-07 20:09:25,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 20:09:25,603 INFO L225 Difference]: With dead ends: 153029 [2018-11-07 20:09:25,603 INFO L226 Difference]: Without dead ends: 100901 [2018-11-07 20:09:25,843 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1092 GetRequests, 1016 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1993 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=968, Invalid=4884, Unknown=0, NotChecked=0, Total=5852 [2018-11-07 20:09:25,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100901 states. [2018-11-07 20:09:27,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100901 to 95149. [2018-11-07 20:09:27,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95149 states. [2018-11-07 20:09:28,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95149 states to 95149 states and 119476 transitions. [2018-11-07 20:09:28,358 INFO L78 Accepts]: Start accepts. Automaton has 95149 states and 119476 transitions. Word has length 481 [2018-11-07 20:09:28,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 20:09:28,358 INFO L480 AbstractCegarLoop]: Abstraction has 95149 states and 119476 transitions. [2018-11-07 20:09:28,358 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-07 20:09:28,359 INFO L276 IsEmpty]: Start isEmpty. Operand 95149 states and 119476 transitions. [2018-11-07 20:09:28,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 490 [2018-11-07 20:09:28,568 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 20:09:28,569 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 20:09:28,569 INFO L423 AbstractCegarLoop]: === Iteration 15 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 20:09:28,569 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:09:28,569 INFO L82 PathProgramCache]: Analyzing trace with hash -1260334420, now seen corresponding path program 1 times [2018-11-07 20:09:28,570 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 20:09:28,570 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:09:28,571 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:09:28,571 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:09:28,571 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 20:09:28,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:09:29,827 INFO L134 CoverageAnalysis]: Checked inductivity of 698 backedges. 116 proven. 2 refuted. 0 times theorem prover too weak. 580 trivial. 0 not checked. [2018-11-07 20:09:29,827 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 20:09:29,827 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 20:09:29,828 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 490 with the following transitions: [2018-11-07 20:09:29,828 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [157], [159], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [562], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [626], [630], [634], [638], [641], [642], [646], [650], [654], [658], [662], [666], [677], [688], [692], [696], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [750], [751], [762], [766], [777], [781], [785], [789], [793], [797], [800], [805], [807], [1084], [1088], [1092], [1098], [1102], [1104], [1109], [1110], [1111], [1113], [1114] [2018-11-07 20:09:29,832 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 20:09:29,833 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 20:09:29,941 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 20:09:30,722 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 20:09:30,722 INFO L272 AbstractInterpreter]: Visited 148 different actions 732 times. Merged at 8 different actions 40 times. Widened at 1 different actions 1 times. Found 8 fixpoints after 3 different actions. Largest state had 28 variables. [2018-11-07 20:09:30,730 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:09:30,730 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 20:09:30,730 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 20:09:30,730 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 20:09:30,739 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:09:30,739 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 20:09:30,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:09:30,878 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 20:09:30,974 INFO L134 CoverageAnalysis]: Checked inductivity of 698 backedges. 375 proven. 0 refuted. 0 times theorem prover too weak. 323 trivial. 0 not checked. [2018-11-07 20:09:30,974 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 20:09:31,134 INFO L134 CoverageAnalysis]: Checked inductivity of 698 backedges. 116 proven. 2 refuted. 0 times theorem prover too weak. 580 trivial. 0 not checked. [2018-11-07 20:09:31,155 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-11-07 20:09:31,155 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 3 [2018-11-07 20:09:31,155 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 20:09:31,156 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-07 20:09:31,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-07 20:09:31,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-07 20:09:31,156 INFO L87 Difference]: Start difference. First operand 95149 states and 119476 transitions. Second operand 3 states. [2018-11-07 20:09:33,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 20:09:33,924 INFO L93 Difference]: Finished difference Result 190689 states and 242588 transitions. [2018-11-07 20:09:33,924 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-07 20:09:33,924 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 489 [2018-11-07 20:09:33,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 20:09:34,149 INFO L225 Difference]: With dead ends: 190689 [2018-11-07 20:09:34,149 INFO L226 Difference]: Without dead ends: 81813 [2018-11-07 20:09:34,369 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 980 GetRequests, 979 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-07 20:09:34,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81813 states. [2018-11-07 20:09:35,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81813 to 81794. [2018-11-07 20:09:35,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81794 states. [2018-11-07 20:09:35,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81794 states to 81794 states and 99826 transitions. [2018-11-07 20:09:35,900 INFO L78 Accepts]: Start accepts. Automaton has 81794 states and 99826 transitions. Word has length 489 [2018-11-07 20:09:35,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 20:09:35,900 INFO L480 AbstractCegarLoop]: Abstraction has 81794 states and 99826 transitions. [2018-11-07 20:09:35,900 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-07 20:09:35,901 INFO L276 IsEmpty]: Start isEmpty. Operand 81794 states and 99826 transitions. [2018-11-07 20:09:36,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 557 [2018-11-07 20:09:36,114 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 20:09:36,115 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 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] [2018-11-07 20:09:36,115 INFO L423 AbstractCegarLoop]: === Iteration 16 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 20:09:36,115 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:09:36,115 INFO L82 PathProgramCache]: Analyzing trace with hash 1271207433, now seen corresponding path program 1 times [2018-11-07 20:09:36,116 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 20:09:36,116 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:09:36,116 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:09:36,117 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:09:36,117 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 20:09:36,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:09:37,435 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 123 proven. 304 refuted. 0 times theorem prover too weak. 393 trivial. 0 not checked. [2018-11-07 20:09:37,436 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 20:09:37,436 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 20:09:37,436 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 557 with the following transitions: [2018-11-07 20:09:37,437 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [157], [159], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [626], [630], [634], [638], [641], [642], [646], [650], [654], [658], [662], [666], [677], [688], [692], [696], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [762], [766], [777], [781], [785], [789], [792], [793], [797], [808], [811], [812], [816], [820], [824], [828], [832], [843], [847], [851], [862], [866], [869], [1084], [1088], [1092], [1098], [1102], [1104], [1109], [1110], [1111], [1113], [1114] [2018-11-07 20:09:37,440 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 20:09:37,441 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 20:09:37,575 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 20:09:39,616 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 20:09:39,616 INFO L272 AbstractInterpreter]: Visited 159 different actions 1273 times. Merged at 9 different actions 80 times. Widened at 1 different actions 3 times. Found 20 fixpoints after 2 different actions. Largest state had 28 variables. [2018-11-07 20:09:39,622 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:09:39,622 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 20:09:39,622 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 20:09:39,622 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-11-07 20:09:39,631 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:09:39,631 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 20:09:39,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:09:39,786 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 20:09:40,180 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 404 proven. 2 refuted. 0 times theorem prover too weak. 414 trivial. 0 not checked. [2018-11-07 20:09:40,181 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 20:09:41,125 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 123 proven. 561 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2018-11-07 20:09:41,146 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 20:09:41,146 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8] total 15 [2018-11-07 20:09:41,146 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 20:09:41,147 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-07 20:09:41,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-07 20:09:41,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2018-11-07 20:09:41,148 INFO L87 Difference]: Start difference. First operand 81794 states and 99826 transitions. Second operand 9 states. [2018-11-07 20:09:46,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 20:09:46,620 INFO L93 Difference]: Finished difference Result 192347 states and 241170 transitions. [2018-11-07 20:09:46,620 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-11-07 20:09:46,621 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 556 [2018-11-07 20:09:46,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 20:09:47,056 INFO L225 Difference]: With dead ends: 192347 [2018-11-07 20:09:47,057 INFO L226 Difference]: Without dead ends: 116825 [2018-11-07 20:09:47,254 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1134 GetRequests, 1113 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=128, Invalid=292, Unknown=0, NotChecked=0, Total=420 [2018-11-07 20:09:47,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116825 states. [2018-11-07 20:09:49,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116825 to 115238. [2018-11-07 20:09:49,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115238 states. [2018-11-07 20:09:49,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115238 states to 115238 states and 144644 transitions. [2018-11-07 20:09:49,785 INFO L78 Accepts]: Start accepts. Automaton has 115238 states and 144644 transitions. Word has length 556 [2018-11-07 20:09:49,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 20:09:49,786 INFO L480 AbstractCegarLoop]: Abstraction has 115238 states and 144644 transitions. [2018-11-07 20:09:49,786 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-07 20:09:49,786 INFO L276 IsEmpty]: Start isEmpty. Operand 115238 states and 144644 transitions. [2018-11-07 20:09:50,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 571 [2018-11-07 20:09:50,079 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 20:09:50,079 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 20:09:50,079 INFO L423 AbstractCegarLoop]: === Iteration 17 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 20:09:50,080 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:09:50,080 INFO L82 PathProgramCache]: Analyzing trace with hash -1942628585, now seen corresponding path program 1 times [2018-11-07 20:09:50,080 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 20:09:50,080 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:09:50,081 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:09:50,081 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:09:50,081 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 20:09:50,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:09:51,103 INFO L134 CoverageAnalysis]: Checked inductivity of 779 backedges. 327 proven. 104 refuted. 0 times theorem prover too weak. 348 trivial. 0 not checked. [2018-11-07 20:09:51,104 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 20:09:51,104 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 20:09:51,104 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 571 with the following transitions: [2018-11-07 20:09:51,105 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [157], [159], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [626], [630], [634], [638], [641], [642], [646], [650], [653], [654], [658], [662], [666], [677], [688], [692], [696], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [762], [766], [777], [781], [785], [789], [793], [797], [808], [812], [816], [820], [824], [828], [832], [843], [847], [851], [862], [866], [869], [870], [874], [878], [889], [893], [897], [901], [905], [909], [913], [924], [928], [932], [936], [940], [944], [948], [952], [956], [960], [971], [975], [979], [983], [987], [991], [1002], [1005], [1008], [1012], [1084], [1088], [1092], [1098], [1102], [1104], [1109], [1110], [1111], [1113], [1114] [2018-11-07 20:09:51,109 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 20:09:51,109 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 20:09:51,247 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 20:09:53,453 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 20:09:53,453 INFO L272 AbstractInterpreter]: Visited 188 different actions 1307 times. Merged at 9 different actions 62 times. Widened at 1 different actions 2 times. Found 15 fixpoints after 3 different actions. Largest state had 28 variables. [2018-11-07 20:09:53,455 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:09:53,455 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 20:09:53,455 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 20:09:53,455 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 20:09:53,464 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:09:53,464 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 20:09:53,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:09:53,630 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 20:09:56,539 INFO L134 CoverageAnalysis]: Checked inductivity of 779 backedges. 479 proven. 2 refuted. 0 times theorem prover too weak. 298 trivial. 0 not checked. [2018-11-07 20:09:56,539 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 20:09:56,908 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2018-11-07 20:09:57,012 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2018-11-07 20:09:57,238 INFO L134 CoverageAnalysis]: Checked inductivity of 779 backedges. 256 proven. 209 refuted. 0 times theorem prover too weak. 314 trivial. 0 not checked. [2018-11-07 20:09:57,259 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 20:09:57,260 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 5] total 14 [2018-11-07 20:09:57,260 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 20:09:57,261 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-07 20:09:57,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-07 20:09:57,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=137, Unknown=2, NotChecked=0, Total=182 [2018-11-07 20:09:57,262 INFO L87 Difference]: Start difference. First operand 115238 states and 144644 transitions. Second operand 12 states. [2018-11-07 20:10:01,629 WARN L179 SmtUtils]: Spent 3.17 s on a formula simplification. DAG size of input: 36 DAG size of output: 17 Received shutdown request... [2018-11-07 20:10:04,895 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-11-07 20:10:04,895 WARN L549 AbstractCegarLoop]: Verification canceled [2018-11-07 20:10:04,902 WARN L205 ceAbstractionStarter]: Timeout [2018-11-07 20:10:04,903 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 08:10:04 BoogieIcfgContainer [2018-11-07 20:10:04,903 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-07 20:10:04,904 INFO L168 Benchmark]: Toolchain (without parser) took 208140.31 ms. Allocated memory was 1.5 GB in the beginning and 4.4 GB in the end (delta: 2.9 GB). Free memory was 1.4 GB in the beginning and 2.9 GB in the end (delta: -1.5 GB). Peak memory consumption was 1.4 GB. Max. memory is 7.1 GB. [2018-11-07 20:10:04,905 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-11-07 20:10:04,905 INFO L168 Benchmark]: CACSL2BoogieTranslator took 951.20 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 63.4 MB). Peak memory consumption was 63.4 MB. Max. memory is 7.1 GB. [2018-11-07 20:10:04,906 INFO L168 Benchmark]: Boogie Procedure Inliner took 169.18 ms. Allocated memory was 1.5 GB in the beginning and 2.2 GB in the end (delta: 727.7 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -843.9 MB). Peak memory consumption was 23.0 MB. Max. memory is 7.1 GB. [2018-11-07 20:10:04,907 INFO L168 Benchmark]: Boogie Preprocessor took 123.80 ms. Allocated memory is still 2.2 GB. Free memory is still 2.2 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-11-07 20:10:04,907 INFO L168 Benchmark]: RCFGBuilder took 5154.77 ms. Allocated memory is still 2.2 GB. Free memory was 2.2 GB in the beginning and 2.0 GB in the end (delta: 172.3 MB). Peak memory consumption was 172.3 MB. Max. memory is 7.1 GB. [2018-11-07 20:10:04,908 INFO L168 Benchmark]: TraceAbstraction took 201735.89 ms. Allocated memory was 2.2 GB in the beginning and 4.4 GB in the end (delta: 2.2 GB). Free memory was 2.0 GB in the beginning and 2.9 GB in the end (delta: -896.0 MB). Peak memory consumption was 1.3 GB. Max. memory is 7.1 GB. [2018-11-07 20:10:04,912 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 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 951.20 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 63.4 MB). Peak memory consumption was 63.4 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 169.18 ms. Allocated memory was 1.5 GB in the beginning and 2.2 GB in the end (delta: 727.7 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -843.9 MB). Peak memory consumption was 23.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 123.80 ms. Allocated memory is still 2.2 GB. Free memory is still 2.2 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 5154.77 ms. Allocated memory is still 2.2 GB. Free memory was 2.2 GB in the beginning and 2.0 GB in the end (delta: 172.3 MB). Peak memory consumption was 172.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 201735.89 ms. Allocated memory was 2.2 GB in the beginning and 4.4 GB in the end (delta: 2.2 GB). Free memory was 2.0 GB in the beginning and 2.9 GB in the end (delta: -896.0 MB). Peak memory consumption was 1.3 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 81]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 81). Cancelled while BasicCegarLoop was constructing difference of abstraction (115238states) and FLOYD_HOARE automaton (currently 22 states, 12 states before enhancement),while ReachableStatesComputation was computing reachable states (1132 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 293 locations, 1 error locations. TIMEOUT Result, 201.6s OverallTime, 17 OverallIterations, 5 TraceHistogramMax, 149.4s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 4228 SDtfs, 24157 SDslu, 6206 SDs, 0 SdLazy, 53519 SolverSat, 7290 SolverUnsat, 6 SolverUnknown, 0 SolverNotchecked, 76.6s Time, PredicateUnifierStatistics: 8 DeclaredPredicates, 8655 GetRequests, 8277 SyntacticMatches, 13 SemanticMatches, 365 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8628 ImplicationChecksByTransitivity, 17.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=115238occurred in iteration=16, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 14.4s AbstIntTime, 13 AbstIntIterations, 4 AbstIntStrong, 0.9972747363640115 AbsIntWeakeningRatio, 0.11555555555555555 AbsIntAvgWeakeningVarsNumRemoved, 22.984 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 10.2s AutomataMinimizationTime, 16 MinimizatonAttempts, 13231 StatesRemovedByMinimization, 16 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.4s SsaConstructionTime, 1.6s SatisfiabilityAnalysisTime, 16.4s InterpolantComputationTime, 8730 NumberOfCodeBlocks, 8730 NumberOfCodeBlocksAsserted, 26 NumberOfCheckSat, 12205 ConstructedInterpolants, 7 QuantifiedInterpolants, 13704027 SizeOfPredicates, 9 NumberOfNonLiveVariables, 5780 ConjunctsInSsa, 56 ConjunctsInUnsatCore, 35 InterpolantComputations, 9 PerfectInterpolantSequences, 11413/13384 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown