java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-INT.epf -i ../../../trunk/examples/svcomp/loops/sum04_false-unreach-call_true-termination.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-1dbac8b [2018-10-27 15:28:26,746 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-27 15:28:26,748 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-27 15:28:26,760 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-27 15:28:26,760 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-27 15:28:26,762 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-27 15:28:26,763 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-27 15:28:26,765 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-27 15:28:26,768 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-27 15:28:26,769 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-27 15:28:26,771 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-27 15:28:26,771 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-27 15:28:26,772 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-27 15:28:26,774 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-27 15:28:26,775 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-27 15:28:26,776 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-27 15:28:26,784 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-27 15:28:26,786 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-27 15:28:26,788 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-27 15:28:26,789 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-27 15:28:26,791 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-27 15:28:26,792 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-27 15:28:26,795 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-27 15:28:26,795 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-27 15:28:26,795 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-27 15:28:26,797 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-27 15:28:26,798 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-27 15:28:26,799 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-27 15:28:26,800 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-27 15:28:26,801 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-27 15:28:26,802 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-27 15:28:26,803 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-10-27 15:28:26,803 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-27 15:28:26,804 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-27 15:28:26,805 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-27 15:28:26,806 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-27 15:28:26,807 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-INT.epf [2018-10-27 15:28:26,831 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-27 15:28:26,831 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-27 15:28:26,832 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-27 15:28:26,832 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-27 15:28:26,832 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-27 15:28:26,833 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-27 15:28:26,833 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-10-27 15:28:26,833 INFO L133 SettingsManager]: * Octagon Domain=false [2018-10-27 15:28:26,833 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-27 15:28:26,833 INFO L133 SettingsManager]: * Log string format=TERM [2018-10-27 15:28:26,834 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-10-27 15:28:26,834 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-27 15:28:26,834 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-27 15:28:26,835 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-27 15:28:26,835 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-27 15:28:26,835 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-27 15:28:26,835 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-27 15:28:26,835 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-27 15:28:26,836 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-27 15:28:26,836 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-27 15:28:26,836 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-27 15:28:26,836 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-27 15:28:26,836 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-27 15:28:26,837 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-27 15:28:26,837 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-27 15:28:26,837 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-27 15:28:26,837 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-27 15:28:26,837 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-27 15:28:26,838 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-10-27 15:28:26,838 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-27 15:28:26,838 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-27 15:28:26,838 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-27 15:28:26,838 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-27 15:28:26,838 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-10-27 15:28:26,902 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-27 15:28:26,915 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-27 15:28:26,918 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-27 15:28:26,920 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-27 15:28:26,920 INFO L276 PluginConnector]: CDTParser initialized [2018-10-27 15:28:26,921 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/loops/sum04_false-unreach-call_true-termination.i [2018-10-27 15:28:26,977 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/23f2a030d/52a1f94f5b6841d8a89252011e4f940c/FLAGd8dcb5ad1 [2018-10-27 15:28:27,407 INFO L298 CDTParser]: Found 1 translation units. [2018-10-27 15:28:27,408 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/sum04_false-unreach-call_true-termination.i [2018-10-27 15:28:27,414 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/23f2a030d/52a1f94f5b6841d8a89252011e4f940c/FLAGd8dcb5ad1 [2018-10-27 15:28:27,429 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/23f2a030d/52a1f94f5b6841d8a89252011e4f940c [2018-10-27 15:28:27,443 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-27 15:28:27,444 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-27 15:28:27,445 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-27 15:28:27,445 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-27 15:28:27,449 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-27 15:28:27,450 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 03:28:27" (1/1) ... [2018-10-27 15:28:27,453 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f637f1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 03:28:27, skipping insertion in model container [2018-10-27 15:28:27,453 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 03:28:27" (1/1) ... [2018-10-27 15:28:27,463 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-27 15:28:27,486 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-27 15:28:27,725 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-27 15:28:27,729 INFO L189 MainTranslator]: Completed pre-run [2018-10-27 15:28:27,746 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-27 15:28:27,760 INFO L193 MainTranslator]: Completed translation [2018-10-27 15:28:27,761 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 03:28:27 WrapperNode [2018-10-27 15:28:27,761 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-27 15:28:27,761 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-27 15:28:27,762 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-27 15:28:27,762 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-27 15:28:27,769 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 03:28:27" (1/1) ... [2018-10-27 15:28:27,774 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 03:28:27" (1/1) ... [2018-10-27 15:28:27,780 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-27 15:28:27,780 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-27 15:28:27,780 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-27 15:28:27,781 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-27 15:28:27,789 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 03:28:27" (1/1) ... [2018-10-27 15:28:27,789 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 03:28:27" (1/1) ... [2018-10-27 15:28:27,790 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 03:28:27" (1/1) ... [2018-10-27 15:28:27,790 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 03:28:27" (1/1) ... [2018-10-27 15:28:27,793 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 03:28:27" (1/1) ... [2018-10-27 15:28:27,797 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 03:28:27" (1/1) ... [2018-10-27 15:28:27,798 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 03:28:27" (1/1) ... [2018-10-27 15:28:27,800 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-27 15:28:27,800 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-27 15:28:27,800 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-27 15:28:27,800 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-27 15:28:27,801 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 03:28:27" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-27 15:28:27,923 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-27 15:28:27,923 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-27 15:28:27,923 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-27 15:28:27,923 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-27 15:28:27,923 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-27 15:28:27,924 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-27 15:28:27,924 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-10-27 15:28:27,924 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-10-27 15:28:28,136 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-27 15:28:28,137 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 03:28:28 BoogieIcfgContainer [2018-10-27 15:28:28,137 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-27 15:28:28,138 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-27 15:28:28,138 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-27 15:28:28,141 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-27 15:28:28,142 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 03:28:27" (1/3) ... [2018-10-27 15:28:28,143 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16912db2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 03:28:28, skipping insertion in model container [2018-10-27 15:28:28,143 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 03:28:27" (2/3) ... [2018-10-27 15:28:28,143 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16912db2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 03:28:28, skipping insertion in model container [2018-10-27 15:28:28,143 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 03:28:28" (3/3) ... [2018-10-27 15:28:28,145 INFO L112 eAbstractionObserver]: Analyzing ICFG sum04_false-unreach-call_true-termination.i [2018-10-27 15:28:28,155 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-27 15:28:28,161 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-27 15:28:28,177 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-27 15:28:28,210 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-27 15:28:28,211 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-27 15:28:28,211 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-27 15:28:28,211 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-27 15:28:28,211 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-27 15:28:28,212 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-27 15:28:28,212 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-27 15:28:28,212 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-27 15:28:28,231 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2018-10-27 15:28:28,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-10-27 15:28:28,237 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 15:28:28,238 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 15:28:28,240 INFO L424 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 15:28:28,246 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 15:28:28,246 INFO L82 PathProgramCache]: Analyzing trace with hash 1713253442, now seen corresponding path program 1 times [2018-10-27 15:28:28,248 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 15:28:28,297 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 15:28:28,297 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 15:28:28,298 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 15:28:28,298 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 15:28:28,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 15:28:28,358 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 15:28:28,360 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 15:28:28,360 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-27 15:28:28,361 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 15:28:28,365 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-10-27 15:28:28,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-10-27 15:28:28,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-27 15:28:28,384 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 2 states. [2018-10-27 15:28:28,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 15:28:28,408 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2018-10-27 15:28:28,408 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-10-27 15:28:28,409 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2018-10-27 15:28:28,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 15:28:28,419 INFO L225 Difference]: With dead ends: 31 [2018-10-27 15:28:28,419 INFO L226 Difference]: Without dead ends: 14 [2018-10-27 15:28:28,423 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-27 15:28:28,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-10-27 15:28:28,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-10-27 15:28:28,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-10-27 15:28:28,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2018-10-27 15:28:28,461 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 10 [2018-10-27 15:28:28,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 15:28:28,461 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2018-10-27 15:28:28,462 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-10-27 15:28:28,462 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2018-10-27 15:28:28,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-10-27 15:28:28,463 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 15:28:28,463 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 15:28:28,463 INFO L424 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 15:28:28,464 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 15:28:28,464 INFO L82 PathProgramCache]: Analyzing trace with hash 1143179357, now seen corresponding path program 1 times [2018-10-27 15:28:28,464 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 15:28:28,465 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 15:28:28,465 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 15:28:28,466 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 15:28:28,466 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 15:28:28,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 15:28:28,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 15:28:28,554 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 15:28:28,555 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-27 15:28:28,555 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 15:28:28,556 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-27 15:28:28,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-27 15:28:28,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-27 15:28:28,558 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 3 states. [2018-10-27 15:28:28,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 15:28:28,690 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2018-10-27 15:28:28,690 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-27 15:28:28,691 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2018-10-27 15:28:28,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 15:28:28,692 INFO L225 Difference]: With dead ends: 27 [2018-10-27 15:28:28,692 INFO L226 Difference]: Without dead ends: 18 [2018-10-27 15:28:28,693 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-27 15:28:28,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-10-27 15:28:28,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2018-10-27 15:28:28,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-10-27 15:28:28,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-10-27 15:28:28,698 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 11 [2018-10-27 15:28:28,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 15:28:28,699 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2018-10-27 15:28:28,699 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-27 15:28:28,699 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2018-10-27 15:28:28,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-27 15:28:28,700 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 15:28:28,700 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 15:28:28,700 INFO L424 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 15:28:28,701 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 15:28:28,701 INFO L82 PathProgramCache]: Analyzing trace with hash -1652058138, now seen corresponding path program 1 times [2018-10-27 15:28:28,701 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 15:28:28,702 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 15:28:28,702 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 15:28:28,703 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 15:28:28,703 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 15:28:28,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 15:28:28,788 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 15:28:28,789 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 15:28:28,789 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 15:28:28,790 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 16 with the following transitions: [2018-10-27 15:28:28,792 INFO L202 CegarAbsIntRunner]: [0], [4], [8], [11], [13], [16], [20], [26], [29], [31], [37], [38], [39], [41] [2018-10-27 15:28:28,822 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-10-27 15:28:28,822 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 15:28:28,992 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-27 15:28:28,994 INFO L272 AbstractInterpreter]: Visited 10 different actions 40 times. Merged at 4 different actions 24 times. Widened at 1 different actions 2 times. Found 1 fixpoints after 1 different actions. Largest state had 3 variables. [2018-10-27 15:28:29,038 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 15:28:29,039 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-27 15:28:29,130 INFO L219 lantSequenceWeakener]: Could never weaken! [2018-10-27 15:28:29,131 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-10-27 15:28:29,232 INFO L415 sIntCurrentIteration]: We unified 14 AI predicates to 14 [2018-10-27 15:28:29,232 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-27 15:28:29,233 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-27 15:28:29,234 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2018-10-27 15:28:29,234 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 15:28:29,234 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-27 15:28:29,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-27 15:28:29,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-27 15:28:29,239 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 4 states. [2018-10-27 15:28:29,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 15:28:29,420 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2018-10-27 15:28:29,420 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-27 15:28:29,420 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2018-10-27 15:28:29,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 15:28:29,421 INFO L225 Difference]: With dead ends: 27 [2018-10-27 15:28:29,421 INFO L226 Difference]: Without dead ends: 22 [2018-10-27 15:28:29,421 INFO L605 BasicCegarLoop]: 2 DeclaredPredicates, 14 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-27 15:28:29,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-10-27 15:28:29,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2018-10-27 15:28:29,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-10-27 15:28:29,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2018-10-27 15:28:29,428 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 15 [2018-10-27 15:28:29,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 15:28:29,430 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2018-10-27 15:28:29,430 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-27 15:28:29,431 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2018-10-27 15:28:29,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-27 15:28:29,432 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 15:28:29,432 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 15:28:29,432 INFO L424 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 15:28:29,433 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 15:28:29,433 INFO L82 PathProgramCache]: Analyzing trace with hash 1335432365, now seen corresponding path program 1 times [2018-10-27 15:28:29,433 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 15:28:29,436 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 15:28:29,436 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 15:28:29,437 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 15:28:29,437 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 15:28:29,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 15:28:29,516 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 15:28:29,516 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 15:28:29,517 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 15:28:29,517 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 20 with the following transitions: [2018-10-27 15:28:29,517 INFO L202 CegarAbsIntRunner]: [0], [4], [8], [11], [13], [16], [18], [20], [26], [29], [31], [37], [38], [39], [41] [2018-10-27 15:28:29,519 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-10-27 15:28:29,519 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 15:28:29,607 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-27 15:28:29,607 INFO L272 AbstractInterpreter]: Visited 15 different actions 64 times. Merged at 5 different actions 34 times. Widened at 1 different actions 3 times. Found 6 fixpoints after 3 different actions. Largest state had 3 variables. [2018-10-27 15:28:29,635 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 15:28:29,636 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-27 15:28:29,636 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 15:28:29,636 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-27 15:28:29,647 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 15:28:29,647 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-27 15:28:29,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 15:28:29,679 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 15:28:29,707 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 15:28:29,708 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 15:28:29,821 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 15:28:29,843 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-27 15:28:29,843 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2018-10-27 15:28:29,843 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-27 15:28:29,844 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-27 15:28:29,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-27 15:28:29,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-27 15:28:29,845 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 4 states. [2018-10-27 15:28:29,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 15:28:29,957 INFO L93 Difference]: Finished difference Result 35 states and 39 transitions. [2018-10-27 15:28:29,960 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-27 15:28:29,960 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2018-10-27 15:28:29,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 15:28:29,961 INFO L225 Difference]: With dead ends: 35 [2018-10-27 15:28:29,961 INFO L226 Difference]: Without dead ends: 26 [2018-10-27 15:28:29,962 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-27 15:28:29,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-10-27 15:28:29,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2018-10-27 15:28:29,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-10-27 15:28:29,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2018-10-27 15:28:29,968 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 19 [2018-10-27 15:28:29,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 15:28:29,969 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2018-10-27 15:28:29,969 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-27 15:28:29,969 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2018-10-27 15:28:29,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-10-27 15:28:29,970 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 15:28:29,970 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 15:28:29,971 INFO L424 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 15:28:29,971 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 15:28:29,971 INFO L82 PathProgramCache]: Analyzing trace with hash 1612548918, now seen corresponding path program 2 times [2018-10-27 15:28:29,971 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 15:28:29,972 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 15:28:29,973 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 15:28:29,973 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 15:28:29,973 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 15:28:29,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 15:28:30,147 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 15:28:30,147 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 15:28:30,148 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 15:28:30,148 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-27 15:28:30,148 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-27 15:28:30,148 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 15:28:30,148 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-27 15:28:30,165 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-27 15:28:30,165 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-10-27 15:28:30,216 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-10-27 15:28:30,216 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-27 15:28:30,219 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 15:28:30,342 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-10-27 15:28:30,343 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 15:28:30,435 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-10-27 15:28:30,456 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-27 15:28:30,456 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2018-10-27 15:28:30,456 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-27 15:28:30,457 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-27 15:28:30,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-27 15:28:30,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-27 15:28:30,460 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 7 states. [2018-10-27 15:28:30,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 15:28:30,570 INFO L93 Difference]: Finished difference Result 47 states and 55 transitions. [2018-10-27 15:28:30,570 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-27 15:28:30,570 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 23 [2018-10-27 15:28:30,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 15:28:30,572 INFO L225 Difference]: With dead ends: 47 [2018-10-27 15:28:30,572 INFO L226 Difference]: Without dead ends: 38 [2018-10-27 15:28:30,573 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-27 15:28:30,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-10-27 15:28:30,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 32. [2018-10-27 15:28:30,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-27 15:28:30,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2018-10-27 15:28:30,579 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 23 [2018-10-27 15:28:30,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 15:28:30,580 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2018-10-27 15:28:30,580 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-27 15:28:30,580 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2018-10-27 15:28:30,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-10-27 15:28:30,581 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 15:28:30,581 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 15:28:30,582 INFO L424 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 15:28:30,582 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 15:28:30,582 INFO L82 PathProgramCache]: Analyzing trace with hash 1421000070, now seen corresponding path program 3 times [2018-10-27 15:28:30,582 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 15:28:30,583 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 15:28:30,584 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-27 15:28:30,584 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 15:28:30,584 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 15:28:30,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 15:28:30,788 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 15:28:30,789 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 15:28:30,789 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 15:28:30,789 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-27 15:28:30,789 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-27 15:28:30,790 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 15:28:30,790 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-27 15:28:30,805 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-27 15:28:30,805 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-10-27 15:28:30,817 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-27 15:28:30,818 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-27 15:28:30,821 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 15:28:30,885 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 14 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 15:28:30,885 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 15:28:31,079 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 14 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 15:28:31,116 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-27 15:28:31,117 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 10 [2018-10-27 15:28:31,117 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-27 15:28:31,118 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-27 15:28:31,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-27 15:28:31,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-27 15:28:31,121 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 10 states. [2018-10-27 15:28:31,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 15:28:31,422 INFO L93 Difference]: Finished difference Result 49 states and 56 transitions. [2018-10-27 15:28:31,423 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-27 15:28:31,423 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 31 [2018-10-27 15:28:31,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 15:28:31,427 INFO L225 Difference]: With dead ends: 49 [2018-10-27 15:28:31,427 INFO L226 Difference]: Without dead ends: 44 [2018-10-27 15:28:31,428 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 55 SyntacticMatches, 6 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-27 15:28:31,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-10-27 15:28:31,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2018-10-27 15:28:31,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-10-27 15:28:31,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 49 transitions. [2018-10-27 15:28:31,436 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 49 transitions. Word has length 31 [2018-10-27 15:28:31,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 15:28:31,436 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 49 transitions. [2018-10-27 15:28:31,436 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-27 15:28:31,437 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 49 transitions. [2018-10-27 15:28:31,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-10-27 15:28:31,438 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 15:28:31,438 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 8, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 15:28:31,438 INFO L424 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 15:28:31,438 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 15:28:31,439 INFO L82 PathProgramCache]: Analyzing trace with hash 940069211, now seen corresponding path program 4 times [2018-10-27 15:28:31,439 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 15:28:31,439 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 15:28:31,440 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-27 15:28:31,440 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 15:28:31,440 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 15:28:31,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-10-27 15:28:31,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-10-27 15:28:31,479 INFO L442 BasicCegarLoop]: Counterexample might be feasible [2018-10-27 15:28:31,503 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.10 03:28:31 BoogieIcfgContainer [2018-10-27 15:28:31,503 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-27 15:28:31,504 INFO L168 Benchmark]: Toolchain (without parser) took 4060.98 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 753.4 MB). Free memory was 1.4 GB in the beginning and 2.1 GB in the end (delta: -636.4 MB). Peak memory consumption was 117.0 MB. Max. memory is 7.1 GB. [2018-10-27 15:28:31,506 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-27 15:28:31,507 INFO L168 Benchmark]: CACSL2BoogieTranslator took 315.95 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2018-10-27 15:28:31,507 INFO L168 Benchmark]: Boogie Procedure Inliner took 18.63 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-27 15:28:31,508 INFO L168 Benchmark]: Boogie Preprocessor took 19.59 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-27 15:28:31,509 INFO L168 Benchmark]: RCFGBuilder took 337.26 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 753.4 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -796.2 MB). Peak memory consumption was 26.4 MB. Max. memory is 7.1 GB. [2018-10-27 15:28:31,510 INFO L168 Benchmark]: TraceAbstraction took 3365.28 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: 149.2 MB). Peak memory consumption was 149.2 MB. Max. memory is 7.1 GB. [2018-10-27 15:28:31,514 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 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 315.95 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 18.63 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 19.59 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 337.26 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 753.4 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -796.2 MB). Peak memory consumption was 26.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3365.28 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: 149.2 MB). Peak memory consumption was 149.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 5]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L12] int i, sn=0; [L13] i=1 VAL [i=1, sn=0] [L13] COND TRUE i<=8 VAL [i=1, sn=0] [L14] COND TRUE i<4 [L15] sn = sn + (2) VAL [i=1, sn=2] [L13] i++ VAL [i=2, sn=2] [L13] COND TRUE i<=8 VAL [i=2, sn=2] [L14] COND TRUE i<4 [L15] sn = sn + (2) VAL [i=2, sn=4] [L13] i++ VAL [i=3, sn=4] [L13] COND TRUE i<=8 VAL [i=3, sn=4] [L14] COND TRUE i<4 [L15] sn = sn + (2) VAL [i=3, sn=6] [L13] i++ VAL [i=4, sn=6] [L13] COND TRUE i<=8 VAL [i=4, sn=6] [L14] COND FALSE !(i<4) VAL [i=4, sn=6] [L13] i++ VAL [i=5, sn=6] [L13] COND TRUE i<=8 VAL [i=5, sn=6] [L14] COND FALSE !(i<4) VAL [i=5, sn=6] [L13] i++ VAL [i=6, sn=6] [L13] COND TRUE i<=8 VAL [i=6, sn=6] [L14] COND FALSE !(i<4) VAL [i=6, sn=6] [L13] i++ VAL [i=7, sn=6] [L13] COND TRUE i<=8 VAL [i=7, sn=6] [L14] COND FALSE !(i<4) VAL [i=7, sn=6] [L13] i++ VAL [i=8, sn=6] [L13] COND TRUE i<=8 VAL [i=8, sn=6] [L14] COND FALSE !(i<4) VAL [i=8, sn=6] [L13] i++ VAL [i=9, sn=6] [L13] COND FALSE !(i<=8) VAL [i=9, sn=6] [L17] CALL __VERIFIER_assert(sn==8*(2) || sn == 0) VAL [\old(cond)=0] [L4] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L5] __VERIFIER_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. UNSAFE Result, 3.3s OverallTime, 7 OverallIterations, 9 TraceHistogramMax, 0.9s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 78 SDtfs, 38 SDslu, 122 SDs, 0 SdLazy, 86 SolverSat, 14 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 2 DeclaredPredicates, 179 GetRequests, 149 SyntacticMatches, 8 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=44occurred in iteration=6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.3s AbstIntTime, 2 AbstIntIterations, 1 AbstIntStrong, 0.9642857142857143 AbsIntWeakeningRatio, 0.35714285714285715 AbsIntAvgWeakeningVarsNumRemoved, 0.0 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 6 MinimizatonAttempts, 9 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.2s InterpolantComputationTime, 225 NumberOfCodeBlocks, 220 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 243 ConstructedInterpolants, 0 QuantifiedInterpolants, 11165 SizeOfPredicates, 4 NumberOfNonLiveVariables, 126 ConjunctsInSsa, 14 ConjunctsInUnsatCore, 12 InterpolantComputations, 2 PerfectInterpolantSequences, 81/230 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...