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/Problem14_label32_true-unreach-call_false-termination.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-df4b876 [2018-11-07 20:36:29,757 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-07 20:36:29,762 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-07 20:36:29,778 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-07 20:36:29,779 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-07 20:36:29,780 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-07 20:36:29,781 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-07 20:36:29,784 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-07 20:36:29,785 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-07 20:36:29,787 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-07 20:36:29,790 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-07 20:36:29,790 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-07 20:36:29,793 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-07 20:36:29,794 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-07 20:36:29,795 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-07 20:36:29,803 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-07 20:36:29,804 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-07 20:36:29,806 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-07 20:36:29,812 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-07 20:36:29,814 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-07 20:36:29,816 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-07 20:36:29,817 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-07 20:36:29,825 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-07 20:36:29,826 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-07 20:36:29,826 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-07 20:36:29,827 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-07 20:36:29,828 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-07 20:36:29,831 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-07 20:36:29,832 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-07 20:36:29,833 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-07 20:36:29,833 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-07 20:36:29,836 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... 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[2018-11-07 20:36:29,838 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 20:36:29,867 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-07 20:36:29,867 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-07 20:36:29,868 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-07 20:36:29,868 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-07 20:36:29,868 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-07 20:36:29,868 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-07 20:36:29,868 INFO L133 SettingsManager]: * Maximum recursion depth of evaluation operations=6 [2018-11-07 20:36:29,869 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-07 20:36:29,869 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-07 20:36:29,869 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-07 20:36:29,870 INFO L133 SettingsManager]: * Log string format=TERM [2018-11-07 20:36:29,870 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-07 20:36:29,870 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-07 20:36:29,871 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-07 20:36:29,871 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-07 20:36:29,871 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-07 20:36:29,871 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-07 20:36:29,871 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-07 20:36:29,871 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-07 20:36:29,872 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-07 20:36:29,872 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-07 20:36:29,872 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-07 20:36:29,872 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-07 20:36:29,873 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-07 20:36:29,873 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-07 20:36:29,873 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-07 20:36:29,873 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-07 20:36:29,873 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-07 20:36:29,874 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-07 20:36:29,875 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-07 20:36:29,875 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-07 20:36:29,876 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-07 20:36:29,876 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-07 20:36:29,876 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-11-07 20:36:29,876 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-11-07 20:36:29,943 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-07 20:36:29,957 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-07 20:36:29,961 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-07 20:36:29,963 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-07 20:36:29,964 INFO L276 PluginConnector]: CDTParser initialized [2018-11-07 20:36:29,965 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label32_true-unreach-call_false-termination.c [2018-11-07 20:36:30,041 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e7a48b5ed/759dcef86b26489ea76de2fc51fcd5f0/FLAG63a47676d [2018-11-07 20:36:30,632 INFO L298 CDTParser]: Found 1 translation units. [2018-11-07 20:36:30,633 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label32_true-unreach-call_false-termination.c [2018-11-07 20:36:30,655 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e7a48b5ed/759dcef86b26489ea76de2fc51fcd5f0/FLAG63a47676d [2018-11-07 20:36:30,676 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e7a48b5ed/759dcef86b26489ea76de2fc51fcd5f0 [2018-11-07 20:36:30,688 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-07 20:36:30,690 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-07 20:36:30,691 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-07 20:36:30,691 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-07 20:36:30,696 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-07 20:36:30,698 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 08:36:30" (1/1) ... [2018-11-07 20:36:30,702 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ade47ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:36:30, skipping insertion in model container [2018-11-07 20:36:30,702 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 08:36:30" (1/1) ... [2018-11-07 20:36:30,714 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-07 20:36:30,793 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-07 20:36:31,358 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 20:36:31,364 INFO L189 MainTranslator]: Completed pre-run [2018-11-07 20:36:31,537 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 20:36:31,557 INFO L193 MainTranslator]: Completed translation [2018-11-07 20:36:31,558 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:36:31 WrapperNode [2018-11-07 20:36:31,558 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-07 20:36:31,559 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-07 20:36:31,559 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-07 20:36:31,559 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-07 20:36:31,570 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:36:31" (1/1) ... [2018-11-07 20:36:31,695 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:36:31" (1/1) ... [2018-11-07 20:36:31,713 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-07 20:36:31,714 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-07 20:36:31,714 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-07 20:36:31,714 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-07 20:36:31,726 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:36:31" (1/1) ... [2018-11-07 20:36:31,726 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:36:31" (1/1) ... [2018-11-07 20:36:31,731 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:36:31" (1/1) ... [2018-11-07 20:36:31,731 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:36:31" (1/1) ... [2018-11-07 20:36:31,777 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:36:31" (1/1) ... [2018-11-07 20:36:31,793 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:36:31" (1/1) ... [2018-11-07 20:36:31,799 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:36:31" (1/1) ... [2018-11-07 20:36:31,807 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-07 20:36:31,808 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-07 20:36:31,808 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-07 20:36:31,808 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-07 20:36:31,809 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:36:31" (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 20:36:31,913 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-11-07 20:36:31,913 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-07 20:36:31,914 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-07 20:36:31,914 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-11-07 20:36:31,914 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-11-07 20:36:31,914 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-07 20:36:31,915 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-07 20:36:31,915 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-07 20:36:31,915 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-07 20:36:35,713 INFO L276 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-07 20:36:35,714 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 08:36:35 BoogieIcfgContainer [2018-11-07 20:36:35,714 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-07 20:36:35,716 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-07 20:36:35,716 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-07 20:36:35,719 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-07 20:36:35,719 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 08:36:30" (1/3) ... [2018-11-07 20:36:35,720 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@123e6042 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 08:36:35, skipping insertion in model container [2018-11-07 20:36:35,720 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:36:31" (2/3) ... [2018-11-07 20:36:35,721 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@123e6042 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 08:36:35, skipping insertion in model container [2018-11-07 20:36:35,721 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 08:36:35" (3/3) ... [2018-11-07 20:36:35,723 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem14_label32_true-unreach-call_false-termination.c [2018-11-07 20:36:35,733 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-07 20:36:35,741 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-07 20:36:35,759 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-07 20:36:35,798 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-07 20:36:35,799 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-07 20:36:35,799 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-07 20:36:35,799 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-07 20:36:35,799 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-07 20:36:35,799 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-07 20:36:35,799 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-07 20:36:35,800 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-07 20:36:35,826 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states. [2018-11-07 20:36:35,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-11-07 20:36:35,837 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 20:36:35,838 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 20:36:35,841 INFO L423 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 20:36:35,847 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:36:35,847 INFO L82 PathProgramCache]: Analyzing trace with hash -1019361724, now seen corresponding path program 1 times [2018-11-07 20:36:35,850 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 20:36:35,904 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:36:35,904 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:36:35,904 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:36:35,905 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 20:36:35,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:36:36,452 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 20:36:36,454 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 20:36:36,455 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-07 20:36:36,455 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 20:36:36,461 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-07 20:36:36,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-07 20:36:36,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 20:36:36,480 INFO L87 Difference]: Start difference. First operand 255 states. Second operand 4 states. [2018-11-07 20:36:39,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 20:36:39,099 INFO L93 Difference]: Finished difference Result 894 states and 1611 transitions. [2018-11-07 20:36:39,102 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-07 20:36:39,103 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 62 [2018-11-07 20:36:39,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 20:36:39,130 INFO L225 Difference]: With dead ends: 894 [2018-11-07 20:36:39,130 INFO L226 Difference]: Without dead ends: 633 [2018-11-07 20:36:39,138 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 20:36:39,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2018-11-07 20:36:39,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 633. [2018-11-07 20:36:39,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 633 states. [2018-11-07 20:36:39,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 633 states to 633 states and 962 transitions. [2018-11-07 20:36:39,240 INFO L78 Accepts]: Start accepts. Automaton has 633 states and 962 transitions. Word has length 62 [2018-11-07 20:36:39,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 20:36:39,241 INFO L480 AbstractCegarLoop]: Abstraction has 633 states and 962 transitions. [2018-11-07 20:36:39,241 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-07 20:36:39,241 INFO L276 IsEmpty]: Start isEmpty. Operand 633 states and 962 transitions. [2018-11-07 20:36:39,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2018-11-07 20:36:39,256 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 20:36:39,256 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:36:39,256 INFO L423 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 20:36:39,257 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:36:39,257 INFO L82 PathProgramCache]: Analyzing trace with hash 585274651, now seen corresponding path program 1 times [2018-11-07 20:36:39,257 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 20:36:39,259 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:36:39,259 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:36:39,259 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:36:39,259 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 20:36:39,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:36:39,609 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 20:36:39,609 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 20:36:39,610 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-07 20:36:39,610 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 20:36:39,612 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-07 20:36:39,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-07 20:36:39,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 20:36:39,613 INFO L87 Difference]: Start difference. First operand 633 states and 962 transitions. Second operand 4 states. [2018-11-07 20:36:42,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 20:36:42,373 INFO L93 Difference]: Finished difference Result 2170 states and 3490 transitions. [2018-11-07 20:36:42,374 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-07 20:36:42,374 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 175 [2018-11-07 20:36:42,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 20:36:42,391 INFO L225 Difference]: With dead ends: 2170 [2018-11-07 20:36:42,391 INFO L226 Difference]: Without dead ends: 1543 [2018-11-07 20:36:42,397 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 20:36:42,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1543 states. [2018-11-07 20:36:42,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1543 to 1543. [2018-11-07 20:36:42,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1543 states. [2018-11-07 20:36:42,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1543 states to 1543 states and 2271 transitions. [2018-11-07 20:36:42,499 INFO L78 Accepts]: Start accepts. Automaton has 1543 states and 2271 transitions. Word has length 175 [2018-11-07 20:36:42,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 20:36:42,500 INFO L480 AbstractCegarLoop]: Abstraction has 1543 states and 2271 transitions. [2018-11-07 20:36:42,500 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-07 20:36:42,500 INFO L276 IsEmpty]: Start isEmpty. Operand 1543 states and 2271 transitions. [2018-11-07 20:36:42,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2018-11-07 20:36:42,518 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 20:36:42,520 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2018-11-07 20:36:42,520 INFO L423 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 20:36:42,520 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:36:42,521 INFO L82 PathProgramCache]: Analyzing trace with hash -2093465648, now seen corresponding path program 1 times [2018-11-07 20:36:42,521 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 20:36:42,522 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:36:42,523 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:36:42,523 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:36:42,523 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 20:36:42,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:36:43,009 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 132 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 20:36:43,010 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 20:36:43,010 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 20:36:43,011 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 251 with the following transitions: [2018-11-07 20:36:43,013 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [345], [353], [361], [369], [377], [385], [393], [397], [399], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [514], [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], [619], [623], [627], [631], [635], [639], [643], [647], [651], [655], [659], [663], [666], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-07 20:36:43,063 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 20:36:43,063 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 20:36:43,775 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 20:36:43,783 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 20:36:43,785 INFO L272 AbstractInterpreter]: Visited 118 different actions 118 times. Never merged. Never widened. Never found a fixpoint. Largest state had 24 variables. [2018-11-07 20:36:43,834 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:36:43,834 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 20:36:44,474 INFO L227 lantSequenceWeakener]: Weakened 241 states. On average, predicates are now at 78.09% of their original sizes. [2018-11-07 20:36:44,475 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 20:36:44,836 INFO L415 sIntCurrentIteration]: We unified 249 AI predicates to 249 [2018-11-07 20:36:44,836 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 20:36:44,837 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 20:36:44,837 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 14 [2018-11-07 20:36:44,840 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 20:36:44,841 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-07 20:36:44,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-07 20:36:44,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2018-11-07 20:36:44,845 INFO L87 Difference]: Start difference. First operand 1543 states and 2271 transitions. Second operand 7 states. [2018-11-07 20:37:00,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 20:37:00,487 INFO L93 Difference]: Finished difference Result 3265 states and 4776 transitions. [2018-11-07 20:37:00,487 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-07 20:37:00,487 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 250 [2018-11-07 20:37:00,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 20:37:00,498 INFO L225 Difference]: With dead ends: 3265 [2018-11-07 20:37:00,498 INFO L226 Difference]: Without dead ends: 1728 [2018-11-07 20:37:00,503 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 250 GetRequests, 244 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 20:37:00,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1728 states. [2018-11-07 20:37:00,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1728 to 1726. [2018-11-07 20:37:00,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1726 states. [2018-11-07 20:37:00,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1726 states to 1726 states and 2461 transitions. [2018-11-07 20:37:00,552 INFO L78 Accepts]: Start accepts. Automaton has 1726 states and 2461 transitions. Word has length 250 [2018-11-07 20:37:00,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 20:37:00,553 INFO L480 AbstractCegarLoop]: Abstraction has 1726 states and 2461 transitions. [2018-11-07 20:37:00,553 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-07 20:37:00,553 INFO L276 IsEmpty]: Start isEmpty. Operand 1726 states and 2461 transitions. [2018-11-07 20:37:00,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 336 [2018-11-07 20:37:00,562 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 20:37:00,562 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:37:00,563 INFO L423 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 20:37:00,563 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:37:00,563 INFO L82 PathProgramCache]: Analyzing trace with hash -2144924513, now seen corresponding path program 1 times [2018-11-07 20:37:00,563 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 20:37:00,564 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:37:00,565 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:37:00,565 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:37:00,565 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 20:37:00,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:37:01,132 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-11-07 20:37:01,334 WARN L179 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-11-07 20:37:02,260 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 253 proven. 142 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-07 20:37:02,261 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 20:37:02,261 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 20:37:02,261 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 336 with the following transitions: [2018-11-07 20:37:02,261 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [345], [353], [361], [369], [377], [385], [393], [397], [399], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [514], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [554], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [655], [659], [663], [666], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-07 20:37:02,267 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 20:37:02,268 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 20:37:02,416 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 20:37:02,540 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 20:37:02,541 INFO L272 AbstractInterpreter]: Visited 122 different actions 237 times. Merged at 4 different actions 4 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2018-11-07 20:37:02,571 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:37:02,571 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 20:37:03,178 INFO L227 lantSequenceWeakener]: Weakened 144 states. On average, predicates are now at 78.03% of their original sizes. [2018-11-07 20:37:03,179 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 20:37:04,195 INFO L415 sIntCurrentIteration]: We unified 334 AI predicates to 334 [2018-11-07 20:37:04,196 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 20:37:04,196 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 20:37:04,196 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [24] imperfect sequences [12] total 34 [2018-11-07 20:37:04,196 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 20:37:04,197 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-11-07 20:37:04,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-11-07 20:37:04,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=442, Unknown=0, NotChecked=0, Total=552 [2018-11-07 20:37:04,198 INFO L87 Difference]: Start difference. First operand 1726 states and 2461 transitions. Second operand 24 states. [2018-11-07 20:37:29,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 20:37:29,491 INFO L93 Difference]: Finished difference Result 4658 states and 6478 transitions. [2018-11-07 20:37:29,491 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-11-07 20:37:29,491 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 335 [2018-11-07 20:37:29,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 20:37:29,506 INFO L225 Difference]: With dead ends: 4658 [2018-11-07 20:37:29,507 INFO L226 Difference]: Without dead ends: 3121 [2018-11-07 20:37:29,513 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 345 GetRequests, 312 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=231, Invalid=959, Unknown=0, NotChecked=0, Total=1190 [2018-11-07 20:37:29,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3121 states. [2018-11-07 20:37:29,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3121 to 3107. [2018-11-07 20:37:29,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3107 states. [2018-11-07 20:37:29,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3107 states to 3107 states and 3917 transitions. [2018-11-07 20:37:29,592 INFO L78 Accepts]: Start accepts. Automaton has 3107 states and 3917 transitions. Word has length 335 [2018-11-07 20:37:29,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 20:37:29,593 INFO L480 AbstractCegarLoop]: Abstraction has 3107 states and 3917 transitions. [2018-11-07 20:37:29,593 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-11-07 20:37:29,593 INFO L276 IsEmpty]: Start isEmpty. Operand 3107 states and 3917 transitions. [2018-11-07 20:37:29,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 362 [2018-11-07 20:37:29,605 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 20:37:29,605 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 20:37:29,606 INFO L423 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 20:37:29,606 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:37:29,606 INFO L82 PathProgramCache]: Analyzing trace with hash 1746465803, now seen corresponding path program 1 times [2018-11-07 20:37:29,606 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 20:37:29,607 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:37:29,607 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:37:29,607 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:37:29,608 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 20:37:29,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:37:30,118 WARN L179 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-11-07 20:37:30,333 WARN L179 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-11-07 20:37:30,557 WARN L179 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-11-07 20:37:30,951 WARN L179 SmtUtils]: Spent 265.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2018-11-07 20:37:31,714 INFO L134 CoverageAnalysis]: Checked inductivity of 426 backedges. 178 proven. 243 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-07 20:37:31,715 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 20:37:31,715 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 20:37:31,715 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 362 with the following transitions: [2018-11-07 20:37:31,716 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [345], [353], [361], [369], [377], [385], [393], [397], [399], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [514], [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], [619], [623], [627], [631], [635], [639], [643], [647], [651], [655], [658], [659], [663], [666], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-07 20:37:31,721 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 20:37:31,721 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 20:37:31,777 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 20:37:31,860 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 20:37:31,861 INFO L272 AbstractInterpreter]: Visited 122 different actions 238 times. Merged at 5 different actions 5 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2018-11-07 20:37:31,866 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:37:31,866 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 20:37:32,283 INFO L227 lantSequenceWeakener]: Weakened 135 states. On average, predicates are now at 79.12% of their original sizes. [2018-11-07 20:37:32,283 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 20:37:32,875 INFO L415 sIntCurrentIteration]: We unified 360 AI predicates to 360 [2018-11-07 20:37:32,875 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 20:37:32,875 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 20:37:32,876 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [21] imperfect sequences [15] total 34 [2018-11-07 20:37:32,876 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 20:37:32,877 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-11-07 20:37:32,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-11-07 20:37:32,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2018-11-07 20:37:32,878 INFO L87 Difference]: Start difference. First operand 3107 states and 3917 transitions. Second operand 21 states. [2018-11-07 20:37:47,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 20:37:47,357 INFO L93 Difference]: Finished difference Result 5017 states and 6668 transitions. [2018-11-07 20:37:47,357 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-11-07 20:37:47,357 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 361 [2018-11-07 20:37:47,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 20:37:47,374 INFO L225 Difference]: With dead ends: 5017 [2018-11-07 20:37:47,374 INFO L226 Difference]: Without dead ends: 3480 [2018-11-07 20:37:47,381 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 378 GetRequests, 341 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=280, Invalid=1202, Unknown=0, NotChecked=0, Total=1482 [2018-11-07 20:37:47,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3480 states. [2018-11-07 20:37:47,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3480 to 3475. [2018-11-07 20:37:47,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3475 states. [2018-11-07 20:37:47,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3475 states to 3475 states and 4314 transitions. [2018-11-07 20:37:47,468 INFO L78 Accepts]: Start accepts. Automaton has 3475 states and 4314 transitions. Word has length 361 [2018-11-07 20:37:47,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 20:37:47,469 INFO L480 AbstractCegarLoop]: Abstraction has 3475 states and 4314 transitions. [2018-11-07 20:37:47,469 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-11-07 20:37:47,469 INFO L276 IsEmpty]: Start isEmpty. Operand 3475 states and 4314 transitions. [2018-11-07 20:37:47,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 372 [2018-11-07 20:37:47,484 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 20:37:47,484 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 20:37:47,488 INFO L423 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 20:37:47,488 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:37:47,488 INFO L82 PathProgramCache]: Analyzing trace with hash -860286313, now seen corresponding path program 1 times [2018-11-07 20:37:47,489 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 20:37:47,489 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:37:47,490 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:37:47,490 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:37:47,490 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 20:37:47,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:37:48,239 INFO L134 CoverageAnalysis]: Checked inductivity of 428 backedges. 281 proven. 142 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-07 20:37:48,240 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 20:37:48,240 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 20:37:48,240 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 372 with the following transitions: [2018-11-07 20:37:48,240 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [345], [353], [361], [369], [377], [385], [393], [397], [399], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [514], [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], [619], [623], [627], [631], [635], [639], [643], [647], [651], [655], [659], [663], [666], [667], [671], [675], [679], [683], [687], [691], [695], [698], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-07 20:37:48,244 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 20:37:48,245 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 20:37:48,295 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 20:37:48,418 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 20:37:48,418 INFO L272 AbstractInterpreter]: Visited 130 different actions 253 times. Merged at 4 different actions 4 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2018-11-07 20:37:48,430 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:37:48,430 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 20:37:48,909 INFO L227 lantSequenceWeakener]: Weakened 144 states. On average, predicates are now at 78.03% of their original sizes. [2018-11-07 20:37:48,909 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 20:37:50,166 INFO L415 sIntCurrentIteration]: We unified 370 AI predicates to 370 [2018-11-07 20:37:50,166 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 20:37:50,166 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 20:37:50,167 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [22] imperfect sequences [12] total 32 [2018-11-07 20:37:50,167 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 20:37:50,168 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-11-07 20:37:50,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-11-07 20:37:50,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=357, Unknown=0, NotChecked=0, Total=462 [2018-11-07 20:37:50,169 INFO L87 Difference]: Start difference. First operand 3475 states and 4314 transitions. Second operand 22 states. [2018-11-07 20:38:09,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 20:38:09,178 INFO L93 Difference]: Finished difference Result 6232 states and 8145 transitions. [2018-11-07 20:38:09,178 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-11-07 20:38:09,178 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 371 [2018-11-07 20:38:09,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 20:38:09,196 INFO L225 Difference]: With dead ends: 6232 [2018-11-07 20:38:09,196 INFO L226 Difference]: Without dead ends: 4695 [2018-11-07 20:38:09,204 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 379 GetRequests, 344 SyntacticMatches, 6 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=189, Invalid=741, Unknown=0, NotChecked=0, Total=930 [2018-11-07 20:38:09,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4695 states. [2018-11-07 20:38:09,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4695 to 4127. [2018-11-07 20:38:09,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4127 states. [2018-11-07 20:38:09,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4127 states to 4127 states and 4998 transitions. [2018-11-07 20:38:09,306 INFO L78 Accepts]: Start accepts. Automaton has 4127 states and 4998 transitions. Word has length 371 [2018-11-07 20:38:09,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 20:38:09,307 INFO L480 AbstractCegarLoop]: Abstraction has 4127 states and 4998 transitions. [2018-11-07 20:38:09,307 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-11-07 20:38:09,307 INFO L276 IsEmpty]: Start isEmpty. Operand 4127 states and 4998 transitions. [2018-11-07 20:38:09,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 397 [2018-11-07 20:38:09,323 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 20:38:09,323 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:38:09,324 INFO L423 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 20:38:09,324 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:38:09,324 INFO L82 PathProgramCache]: Analyzing trace with hash 2059011196, now seen corresponding path program 1 times [2018-11-07 20:38:09,324 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 20:38:09,325 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:38:09,325 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:38:09,325 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:38:09,326 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 20:38:09,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:38:09,798 WARN L179 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-11-07 20:38:10,388 INFO L134 CoverageAnalysis]: Checked inductivity of 428 backedges. 265 proven. 158 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-07 20:38:10,388 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 20:38:10,388 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 20:38:10,389 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 397 with the following transitions: [2018-11-07 20:38:10,389 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [345], [353], [361], [369], [377], [385], [393], [397], [399], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [514], [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], [619], [623], [627], [631], [635], [639], [643], [647], [651], [655], [659], [663], [666], [667], [671], [675], [679], [683], [687], [691], [695], [699], [703], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [755], [759], [763], [767], [771], [775], [779], [783], [787], [791], [795], [798], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-07 20:38:10,392 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 20:38:10,392 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 20:38:10,468 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 20:38:11,358 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 20:38:11,358 INFO L272 AbstractInterpreter]: Visited 155 different actions 303 times. Merged at 4 different actions 4 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2018-11-07 20:38:11,387 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:38:11,387 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 20:38:12,139 INFO L227 lantSequenceWeakener]: Weakened 82 states. On average, predicates are now at 78.6% of their original sizes. [2018-11-07 20:38:12,140 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 20:38:12,601 INFO L415 sIntCurrentIteration]: We unified 395 AI predicates to 395 [2018-11-07 20:38:12,602 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 20:38:12,602 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 20:38:12,602 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [20] imperfect sequences [13] total 31 [2018-11-07 20:38:12,602 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 20:38:12,603 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-11-07 20:38:12,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-11-07 20:38:12,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2018-11-07 20:38:12,603 INFO L87 Difference]: Start difference. First operand 4127 states and 4998 transitions. Second operand 20 states. [2018-11-07 20:38:34,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 20:38:34,391 INFO L93 Difference]: Finished difference Result 6881 states and 8828 transitions. [2018-11-07 20:38:34,391 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-11-07 20:38:34,391 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 396 [2018-11-07 20:38:34,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 20:38:34,412 INFO L225 Difference]: With dead ends: 6881 [2018-11-07 20:38:34,412 INFO L226 Difference]: Without dead ends: 5344 [2018-11-07 20:38:34,418 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 405 GetRequests, 377 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=176, Invalid=694, Unknown=0, NotChecked=0, Total=870 [2018-11-07 20:38:34,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5344 states. [2018-11-07 20:38:34,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5344 to 4775. [2018-11-07 20:38:34,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4775 states. [2018-11-07 20:38:34,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4775 states to 4775 states and 5679 transitions. [2018-11-07 20:38:34,544 INFO L78 Accepts]: Start accepts. Automaton has 4775 states and 5679 transitions. Word has length 396 [2018-11-07 20:38:34,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 20:38:34,545 INFO L480 AbstractCegarLoop]: Abstraction has 4775 states and 5679 transitions. [2018-11-07 20:38:34,545 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-11-07 20:38:34,545 INFO L276 IsEmpty]: Start isEmpty. Operand 4775 states and 5679 transitions. [2018-11-07 20:38:34,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 410 [2018-11-07 20:38:34,565 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 20:38:34,565 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:38:34,565 INFO L423 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 20:38:34,566 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:38:34,566 INFO L82 PathProgramCache]: Analyzing trace with hash -87054677, now seen corresponding path program 1 times [2018-11-07 20:38:34,566 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 20:38:34,567 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:38:34,567 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:38:34,567 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:38:34,567 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 20:38:34,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:38:35,049 WARN L179 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-11-07 20:38:35,446 WARN L179 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-11-07 20:38:35,909 WARN L179 SmtUtils]: Spent 329.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2018-11-07 20:38:36,525 INFO L134 CoverageAnalysis]: Checked inductivity of 428 backedges. 252 proven. 171 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-07 20:38:36,525 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 20:38:36,525 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 20:38:36,526 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 410 with the following transitions: [2018-11-07 20:38:36,526 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [345], [353], [361], [369], [377], [385], [393], [397], [399], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [514], [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], [619], [623], [627], [631], [635], [639], [643], [647], [651], [655], [659], [663], [666], [667], [671], [675], [679], [683], [687], [691], [695], [699], [703], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [755], [759], [763], [767], [771], [775], [779], [783], [787], [791], [795], [799], [803], [807], [811], [815], [819], [823], [827], [831], [835], [839], [843], [847], [850], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-07 20:38:36,529 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 20:38:36,529 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 20:38:36,582 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 20:38:36,735 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 20:38:36,735 INFO L272 AbstractInterpreter]: Visited 168 different actions 329 times. Merged at 4 different actions 4 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2018-11-07 20:38:36,745 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:38:36,745 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 20:38:37,160 INFO L227 lantSequenceWeakener]: Weakened 144 states. On average, predicates are now at 78.03% of their original sizes. [2018-11-07 20:38:37,160 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 20:38:37,686 INFO L415 sIntCurrentIteration]: We unified 408 AI predicates to 408 [2018-11-07 20:38:37,686 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 20:38:37,687 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 20:38:37,687 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [24] imperfect sequences [12] total 34 [2018-11-07 20:38:37,687 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 20:38:37,689 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-11-07 20:38:37,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-11-07 20:38:37,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=442, Unknown=0, NotChecked=0, Total=552 [2018-11-07 20:38:37,690 INFO L87 Difference]: Start difference. First operand 4775 states and 5679 transitions. Second operand 24 states. [2018-11-07 20:38:59,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 20:38:59,537 INFO L93 Difference]: Finished difference Result 7530 states and 9510 transitions. [2018-11-07 20:38:59,537 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-11-07 20:38:59,537 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 409 [2018-11-07 20:38:59,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 20:38:59,557 INFO L225 Difference]: With dead ends: 7530 [2018-11-07 20:38:59,557 INFO L226 Difference]: Without dead ends: 5993 [2018-11-07 20:38:59,565 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 419 GetRequests, 386 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=231, Invalid=959, Unknown=0, NotChecked=0, Total=1190 [2018-11-07 20:38:59,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5993 states. [2018-11-07 20:38:59,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5993 to 5423. [2018-11-07 20:38:59,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5423 states. [2018-11-07 20:38:59,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5423 states to 5423 states and 6360 transitions. [2018-11-07 20:38:59,698 INFO L78 Accepts]: Start accepts. Automaton has 5423 states and 6360 transitions. Word has length 409 [2018-11-07 20:38:59,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 20:38:59,699 INFO L480 AbstractCegarLoop]: Abstraction has 5423 states and 6360 transitions. [2018-11-07 20:38:59,699 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-11-07 20:38:59,699 INFO L276 IsEmpty]: Start isEmpty. Operand 5423 states and 6360 transitions. [2018-11-07 20:38:59,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 422 [2018-11-07 20:38:59,719 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 20:38:59,719 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:38:59,719 INFO L423 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 20:38:59,720 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:38:59,720 INFO L82 PathProgramCache]: Analyzing trace with hash -353262765, now seen corresponding path program 1 times [2018-11-07 20:38:59,720 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 20:38:59,721 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:38:59,721 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:38:59,721 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:38:59,721 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 20:38:59,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:39:01,322 INFO L134 CoverageAnalysis]: Checked inductivity of 428 backedges. 240 proven. 183 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-07 20:39:01,322 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 20:39:01,323 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 20:39:01,323 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 422 with the following transitions: [2018-11-07 20:39:01,323 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [345], [353], [361], [369], [377], [385], [393], [397], [399], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [514], [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], [619], [623], [627], [631], [635], [639], [643], [647], [651], [655], [659], [663], [666], [667], [671], [675], [679], [683], [687], [691], [695], [699], [703], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [755], [759], [763], [767], [771], [775], [779], [783], [787], [791], [795], [799], [803], [807], [811], [815], [819], [823], [827], [831], [835], [839], [843], [847], [851], [855], [859], [863], [867], [871], [875], [879], [883], [887], [891], [895], [898], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-07 20:39:01,326 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 20:39:01,326 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 20:39:01,397 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 20:39:01,566 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 20:39:01,566 INFO L272 AbstractInterpreter]: Visited 180 different actions 353 times. Merged at 4 different actions 4 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2018-11-07 20:39:01,574 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:39:01,574 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 20:39:02,022 INFO L227 lantSequenceWeakener]: Weakened 86 states. On average, predicates are now at 78.54% of their original sizes. [2018-11-07 20:39:02,023 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 20:39:02,466 INFO L415 sIntCurrentIteration]: We unified 420 AI predicates to 420 [2018-11-07 20:39:02,466 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 20:39:02,466 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 20:39:02,466 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [21] imperfect sequences [14] total 33 [2018-11-07 20:39:02,466 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 20:39:02,467 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-11-07 20:39:02,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-11-07 20:39:02,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2018-11-07 20:39:02,468 INFO L87 Difference]: Start difference. First operand 5423 states and 6360 transitions. Second operand 21 states. [2018-11-07 20:39:29,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 20:39:29,692 INFO L93 Difference]: Finished difference Result 8177 states and 10190 transitions. [2018-11-07 20:39:29,692 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-11-07 20:39:29,692 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 421 [2018-11-07 20:39:29,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 20:39:29,710 INFO L225 Difference]: With dead ends: 8177 [2018-11-07 20:39:29,710 INFO L226 Difference]: Without dead ends: 6640 [2018-11-07 20:39:29,717 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 431 GetRequests, 401 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=197, Invalid=795, Unknown=0, NotChecked=0, Total=992 [2018-11-07 20:39:29,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6640 states. [2018-11-07 20:39:29,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6640 to 6069. [2018-11-07 20:39:29,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6069 states. [2018-11-07 20:39:29,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6069 states to 6069 states and 7039 transitions. [2018-11-07 20:39:29,819 INFO L78 Accepts]: Start accepts. Automaton has 6069 states and 7039 transitions. Word has length 421 [2018-11-07 20:39:29,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 20:39:29,820 INFO L480 AbstractCegarLoop]: Abstraction has 6069 states and 7039 transitions. [2018-11-07 20:39:29,820 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-11-07 20:39:29,820 INFO L276 IsEmpty]: Start isEmpty. Operand 6069 states and 7039 transitions. [2018-11-07 20:39:29,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 447 [2018-11-07 20:39:29,837 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 20:39:29,837 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 2, 2, 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] [2018-11-07 20:39:29,838 INFO L423 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 20:39:29,838 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:39:29,838 INFO L82 PathProgramCache]: Analyzing trace with hash -425819300, now seen corresponding path program 1 times [2018-11-07 20:39:29,838 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 20:39:29,839 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:39:29,839 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:39:29,839 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:39:29,839 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 20:39:29,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:39:30,411 INFO L134 CoverageAnalysis]: Checked inductivity of 726 backedges. 313 proven. 182 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2018-11-07 20:39:30,412 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 20:39:30,412 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 20:39:30,412 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 447 with the following transitions: [2018-11-07 20:39:30,412 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [345], [353], [361], [369], [377], [385], [393], [397], [399], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [514], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [554], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [655], [658], [659], [663], [666], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-07 20:39:30,414 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 20:39:30,415 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 20:39:30,510 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 20:39:31,121 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 20:39:31,122 INFO L272 AbstractInterpreter]: Visited 123 different actions 364 times. Merged at 7 different actions 17 times. Never widened. Found 4 fixpoints after 2 different actions. Largest state had 24 variables. [2018-11-07 20:39:31,123 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:39:31,123 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 20:39:31,713 INFO L227 lantSequenceWeakener]: Weakened 104 states. On average, predicates are now at 77.36% of their original sizes. [2018-11-07 20:39:31,713 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 20:39:31,985 INFO L415 sIntCurrentIteration]: We unified 445 AI predicates to 445 [2018-11-07 20:39:31,985 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 20:39:31,985 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 20:39:31,985 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [16] imperfect sequences [6] total 20 [2018-11-07 20:39:31,985 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 20:39:31,986 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-11-07 20:39:31,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-11-07 20:39:31,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2018-11-07 20:39:31,987 INFO L87 Difference]: Start difference. First operand 6069 states and 7039 transitions. Second operand 16 states. [2018-11-07 20:39:49,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 20:39:49,715 INFO L93 Difference]: Finished difference Result 11078 states and 13108 transitions. [2018-11-07 20:39:49,715 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-11-07 20:39:49,715 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 446 [2018-11-07 20:39:49,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 20:39:49,729 INFO L225 Difference]: With dead ends: 11078 [2018-11-07 20:39:49,730 INFO L226 Difference]: Without dead ends: 5758 [2018-11-07 20:39:49,741 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 456 GetRequests, 431 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=153, Invalid=549, Unknown=0, NotChecked=0, Total=702 [2018-11-07 20:39:49,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5758 states. [2018-11-07 20:39:49,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5758 to 5739. [2018-11-07 20:39:49,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5739 states. [2018-11-07 20:39:49,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5739 states to 5739 states and 6721 transitions. [2018-11-07 20:39:49,844 INFO L78 Accepts]: Start accepts. Automaton has 5739 states and 6721 transitions. Word has length 446 [2018-11-07 20:39:49,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 20:39:49,844 INFO L480 AbstractCegarLoop]: Abstraction has 5739 states and 6721 transitions. [2018-11-07 20:39:49,845 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-11-07 20:39:49,845 INFO L276 IsEmpty]: Start isEmpty. Operand 5739 states and 6721 transitions. [2018-11-07 20:39:49,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 463 [2018-11-07 20:39:49,862 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 20:39:49,862 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 20:39:49,863 INFO L423 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 20:39:49,863 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:39:49,863 INFO L82 PathProgramCache]: Analyzing trace with hash 737515992, now seen corresponding path program 1 times [2018-11-07 20:39:49,863 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 20:39:49,864 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:39:49,864 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:39:49,864 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:39:49,865 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 20:39:49,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:39:50,251 WARN L179 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2018-11-07 20:39:50,764 INFO L134 CoverageAnalysis]: Checked inductivity of 763 backedges. 368 proven. 257 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2018-11-07 20:39:50,764 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 20:39:50,764 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 20:39:50,764 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 463 with the following transitions: [2018-11-07 20:39:50,764 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [345], [353], [361], [369], [377], [385], [393], [397], [399], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [514], [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], [619], [623], [627], [630], [631], [635], [639], [643], [647], [651], [654], [655], [658], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-07 20:39:50,766 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 20:39:50,766 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 20:39:50,870 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 20:39:50,949 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 20:39:50,949 INFO L272 AbstractInterpreter]: Visited 121 different actions 360 times. Merged at 7 different actions 19 times. Never widened. Found 3 fixpoints after 2 different actions. Largest state had 24 variables. [2018-11-07 20:39:50,957 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:39:50,957 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 20:39:51,295 INFO L227 lantSequenceWeakener]: Weakened 459 states. On average, predicates are now at 80.5% of their original sizes. [2018-11-07 20:39:51,295 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 20:39:51,374 INFO L415 sIntCurrentIteration]: We unified 461 AI predicates to 461 [2018-11-07 20:39:51,374 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 20:39:51,375 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 20:39:51,375 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [7] total 15 [2018-11-07 20:39:51,375 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 20:39:51,376 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-07 20:39:51,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-07 20:39:51,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2018-11-07 20:39:51,376 INFO L87 Difference]: Start difference. First operand 5739 states and 6721 transitions. Second operand 10 states. [2018-11-07 20:39:56,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 20:39:56,032 INFO L93 Difference]: Finished difference Result 8798 states and 10967 transitions. [2018-11-07 20:39:56,032 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-11-07 20:39:56,033 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 462 [2018-11-07 20:39:56,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 20:39:56,050 INFO L225 Difference]: With dead ends: 8798 [2018-11-07 20:39:56,050 INFO L226 Difference]: Without dead ends: 6694 [2018-11-07 20:39:56,058 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 469 GetRequests, 453 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2018-11-07 20:39:56,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6694 states. [2018-11-07 20:39:56,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6694 to 6485. [2018-11-07 20:39:56,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6485 states. [2018-11-07 20:39:56,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6485 states to 6485 states and 7622 transitions. [2018-11-07 20:39:56,164 INFO L78 Accepts]: Start accepts. Automaton has 6485 states and 7622 transitions. Word has length 462 [2018-11-07 20:39:56,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 20:39:56,165 INFO L480 AbstractCegarLoop]: Abstraction has 6485 states and 7622 transitions. [2018-11-07 20:39:56,165 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-07 20:39:56,165 INFO L276 IsEmpty]: Start isEmpty. Operand 6485 states and 7622 transitions. [2018-11-07 20:39:56,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 546 [2018-11-07 20:39:56,184 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 20:39:56,184 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 20:39:56,184 INFO L423 AbstractCegarLoop]: === Iteration 12 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 20:39:56,185 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:39:56,185 INFO L82 PathProgramCache]: Analyzing trace with hash -1260147717, now seen corresponding path program 1 times [2018-11-07 20:39:56,185 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 20:39:56,186 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:39:56,186 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:39:56,186 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:39:56,186 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 20:39:56,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:39:57,446 WARN L179 SmtUtils]: Spent 347.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2018-11-07 20:39:58,311 INFO L134 CoverageAnalysis]: Checked inductivity of 1127 backedges. 595 proven. 387 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2018-11-07 20:39:58,311 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 20:39:58,311 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 20:39:58,312 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 546 with the following transitions: [2018-11-07 20:39:58,312 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [345], [353], [361], [369], [377], [385], [393], [397], [399], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [510], [511], [514], [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], [619], [623], [627], [631], [635], [639], [643], [647], [651], [654], [655], [658], [659], [663], [666], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-07 20:39:58,314 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 20:39:58,314 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 20:39:58,338 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 20:39:58,691 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 20:39:58,692 INFO L272 AbstractInterpreter]: Visited 125 different actions 622 times. Merged at 10 different actions 44 times. Widened at 1 different actions 1 times. Found 10 fixpoints after 3 different actions. Largest state had 24 variables. [2018-11-07 20:39:58,698 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:39:58,699 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 20:39:58,699 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 20:39:58,699 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 20:39:58,710 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:39:58,710 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 20:39:58,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:39:58,889 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 20:39:59,671 INFO L134 CoverageAnalysis]: Checked inductivity of 1127 backedges. 287 proven. 0 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2018-11-07 20:39:59,671 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 20:40:00,287 INFO L134 CoverageAnalysis]: Checked inductivity of 1127 backedges. 287 proven. 0 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2018-11-07 20:40:00,320 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-11-07 20:40:00,321 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [14] total 16 [2018-11-07 20:40:00,321 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 20:40:00,323 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-07 20:40:00,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-07 20:40:00,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2018-11-07 20:40:00,323 INFO L87 Difference]: Start difference. First operand 6485 states and 7622 transitions. Second operand 3 states. [2018-11-07 20:40:03,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 20:40:03,677 INFO L93 Difference]: Finished difference Result 12397 states and 15412 transitions. [2018-11-07 20:40:03,677 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-07 20:40:03,677 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 545 [2018-11-07 20:40:03,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 20:40:03,693 INFO L225 Difference]: With dead ends: 12397 [2018-11-07 20:40:03,693 INFO L226 Difference]: Without dead ends: 3935 [2018-11-07 20:40:03,724 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1105 GetRequests, 1091 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2018-11-07 20:40:03,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3935 states. [2018-11-07 20:40:03,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3935 to 3935. [2018-11-07 20:40:03,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3935 states. [2018-11-07 20:40:03,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3935 states to 3935 states and 5135 transitions. [2018-11-07 20:40:03,825 INFO L78 Accepts]: Start accepts. Automaton has 3935 states and 5135 transitions. Word has length 545 [2018-11-07 20:40:03,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 20:40:03,826 INFO L480 AbstractCegarLoop]: Abstraction has 3935 states and 5135 transitions. [2018-11-07 20:40:03,827 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-07 20:40:03,827 INFO L276 IsEmpty]: Start isEmpty. Operand 3935 states and 5135 transitions. [2018-11-07 20:40:03,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 566 [2018-11-07 20:40:03,839 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 20:40:03,839 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 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] [2018-11-07 20:40:03,840 INFO L423 AbstractCegarLoop]: === Iteration 13 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 20:40:03,840 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:40:03,840 INFO L82 PathProgramCache]: Analyzing trace with hash 1162330899, now seen corresponding path program 1 times [2018-11-07 20:40:03,840 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 20:40:03,841 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:40:03,841 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:40:03,841 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:40:03,841 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 20:40:03,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:40:05,215 WARN L179 SmtUtils]: Spent 337.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2018-11-07 20:40:05,697 WARN L179 SmtUtils]: Spent 367.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2018-11-07 20:40:06,047 WARN L179 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 30 [2018-11-07 20:40:06,698 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 595 proven. 427 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2018-11-07 20:40:06,698 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 20:40:06,698 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 20:40:06,698 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 566 with the following transitions: [2018-11-07 20:40:06,699 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [345], [353], [361], [369], [377], [385], [393], [397], [399], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [510], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [594], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [654], [655], [658], [659], [663], [666], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-07 20:40:06,702 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 20:40:06,702 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 20:40:06,768 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 20:40:07,698 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 20:40:07,699 INFO L272 AbstractInterpreter]: Visited 125 different actions 622 times. Merged at 10 different actions 44 times. Widened at 1 different actions 1 times. Found 10 fixpoints after 3 different actions. Largest state had 24 variables. [2018-11-07 20:40:07,735 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:40:07,735 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 20:40:07,735 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 20:40:07,735 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 20:40:07,755 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:40:07,755 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 20:40:07,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:40:07,916 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 20:40:08,533 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 287 proven. 0 refuted. 0 times theorem prover too weak. 900 trivial. 0 not checked. [2018-11-07 20:40:08,533 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 20:40:09,444 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 287 proven. 0 refuted. 0 times theorem prover too weak. 900 trivial. 0 not checked. [2018-11-07 20:40:09,479 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-11-07 20:40:09,479 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [14] total 15 [2018-11-07 20:40:09,480 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 20:40:09,480 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-07 20:40:09,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-07 20:40:09,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2018-11-07 20:40:09,481 INFO L87 Difference]: Start difference. First operand 3935 states and 5135 transitions. Second operand 3 states. Received shutdown request... [2018-11-07 20:40:10,067 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-07 20:40:10,067 WARN L549 AbstractCegarLoop]: Verification canceled [2018-11-07 20:40:10,074 WARN L205 ceAbstractionStarter]: Timeout [2018-11-07 20:40:10,074 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 08:40:10 BoogieIcfgContainer [2018-11-07 20:40:10,074 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-07 20:40:10,075 INFO L168 Benchmark]: Toolchain (without parser) took 219386.26 ms. Allocated memory was 1.5 GB in the beginning and 4.8 GB in the end (delta: 3.3 GB). Free memory was 1.4 GB in the beginning and 3.3 GB in the end (delta: -1.8 GB). Peak memory consumption was 1.4 GB. Max. memory is 7.1 GB. [2018-11-07 20:40:10,076 INFO L168 Benchmark]: CDTParser took 0.96 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-11-07 20:40:10,077 INFO L168 Benchmark]: CACSL2BoogieTranslator took 867.25 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 42.3 MB). Peak memory consumption was 42.3 MB. Max. memory is 7.1 GB. [2018-11-07 20:40:10,078 INFO L168 Benchmark]: Boogie Procedure Inliner took 154.63 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 751.3 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -837.9 MB). Peak memory consumption was 19.5 MB. Max. memory is 7.1 GB. [2018-11-07 20:40:10,078 INFO L168 Benchmark]: Boogie Preprocessor took 93.46 ms. Allocated memory is still 2.3 GB. Free memory is still 2.2 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-11-07 20:40:10,079 INFO L168 Benchmark]: RCFGBuilder took 3906.83 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.1 GB in the end (delta: 130.0 MB). Peak memory consumption was 130.0 MB. Max. memory is 7.1 GB. [2018-11-07 20:40:10,080 INFO L168 Benchmark]: TraceAbstraction took 214358.68 ms. Allocated memory was 2.3 GB in the beginning and 4.8 GB in the end (delta: 2.5 GB). Free memory was 2.1 GB in the beginning and 3.3 GB in the end (delta: -1.2 GB). Peak memory consumption was 1.4 GB. Max. memory is 7.1 GB. [2018-11-07 20:40:10,084 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.96 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 867.25 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 42.3 MB). Peak memory consumption was 42.3 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 154.63 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 751.3 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -837.9 MB). Peak memory consumption was 19.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 93.46 ms. Allocated memory is still 2.3 GB. Free memory is still 2.2 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 3906.83 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.1 GB in the end (delta: 130.0 MB). Peak memory consumption was 130.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 214358.68 ms. Allocated memory was 2.3 GB in the beginning and 4.8 GB in the end (delta: 2.5 GB). Free memory was 2.1 GB in the beginning and 3.3 GB in the end (delta: -1.2 GB). Peak memory consumption was 1.4 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 169]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 169). Cancelled while BasicCegarLoop was constructing difference of abstraction (3935states) and FLOYD_HOARE automaton (currently 3 states, 3 states before enhancement),while ReachableStatesComputation was computing reachable states (434 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 255 locations, 1 error locations. TIMEOUT Result, 214.2s OverallTime, 13 OverallIterations, 6 TraceHistogramMax, 177.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 2920 SDtfs, 27835 SDslu, 2821 SDs, 0 SdLazy, 29802 SolverSat, 3067 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 57.1s Time, PredicateUnifierStatistics: 18 DeclaredPredicates, 5793 GetRequests, 5517 SyntacticMatches, 8 SemanticMatches, 268 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1942 ImplicationChecksByTransitivity, 11.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=6485occurred in iteration=11, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 5.2s AbstIntTime, 11 AbstIntIterations, 9 AbstIntStrong, 0.997321598339379 AbsIntWeakeningRatio, 0.08541545613015689 AbsIntAvgWeakeningVarsNumRemoved, 14.296339337594421 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 1.1s AutomataMinimizationTime, 12 MinimizatonAttempts, 2527 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.2s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 15.4s InterpolantComputationTime, 5908 NumberOfCodeBlocks, 5908 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 7001 ConstructedInterpolants, 0 QuantifiedInterpolants, 19546976 SizeOfPredicates, 4 NumberOfNonLiveVariables, 1698 ConjunctsInSsa, 8 ConjunctsInUnsatCore, 17 InterpolantComputations, 6 PerfectInterpolantSequences, 8864/11209 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown