java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-EXP.epf -i ../../../trunk/examples/svcomp/loop-new/half_true-unreach-call_true-termination.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-d380424 [2018-10-24 12:38:10,657 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-24 12:38:10,659 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-24 12:38:10,674 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-24 12:38:10,674 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-24 12:38:10,675 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-24 12:38:10,677 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-24 12:38:10,679 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-24 12:38:10,682 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-24 12:38:10,684 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-24 12:38:10,686 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-24 12:38:10,687 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-24 12:38:10,688 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-24 12:38:10,689 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-24 12:38:10,690 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-24 12:38:10,699 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-24 12:38:10,700 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-24 12:38:10,705 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-24 12:38:10,709 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-24 12:38:10,710 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-24 12:38:10,711 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-24 12:38:10,713 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-24 12:38:10,715 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-24 12:38:10,715 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-24 12:38:10,715 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-24 12:38:10,716 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-24 12:38:10,717 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-24 12:38:10,718 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-24 12:38:10,718 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-24 12:38:10,719 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-24 12:38:10,720 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-24 12:38:10,720 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... 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[2018-10-24 12:38:10,723 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-EXP.epf [2018-10-24 12:38:10,747 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-24 12:38:10,747 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-24 12:38:10,751 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-24 12:38:10,751 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-24 12:38:10,751 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-24 12:38:10,751 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-24 12:38:10,752 INFO L133 SettingsManager]: * Explicit value domain=true [2018-10-24 12:38:10,752 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-10-24 12:38:10,752 INFO L133 SettingsManager]: * Octagon Domain=false [2018-10-24 12:38:10,752 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-24 12:38:10,752 INFO L133 SettingsManager]: * Log string format=TERM [2018-10-24 12:38:10,753 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-10-24 12:38:10,753 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-24 12:38:10,753 INFO L133 SettingsManager]: * Interval Domain=false [2018-10-24 12:38:10,754 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-24 12:38:10,754 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-24 12:38:10,754 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-24 12:38:10,755 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-24 12:38:10,756 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-24 12:38:10,756 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-24 12:38:10,757 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-24 12:38:10,757 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-24 12:38:10,757 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-24 12:38:10,757 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-24 12:38:10,757 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-24 12:38:10,758 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-24 12:38:10,758 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-24 12:38:10,758 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-24 12:38:10,758 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-24 12:38:10,759 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-24 12:38:10,759 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-10-24 12:38:10,759 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-24 12:38:10,759 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-24 12:38:10,759 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-24 12:38:10,760 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-24 12:38:10,760 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-10-24 12:38:10,809 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-24 12:38:10,825 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-24 12:38:10,829 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-24 12:38:10,830 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-24 12:38:10,831 INFO L276 PluginConnector]: CDTParser initialized [2018-10-24 12:38:10,832 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/loop-new/half_true-unreach-call_true-termination.i [2018-10-24 12:38:10,896 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/baa809f1b/25acf942a4fc4c63b6f1aedcd720a7e6/FLAG5df68146a [2018-10-24 12:38:11,360 INFO L298 CDTParser]: Found 1 translation units. [2018-10-24 12:38:11,361 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-new/half_true-unreach-call_true-termination.i [2018-10-24 12:38:11,367 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/baa809f1b/25acf942a4fc4c63b6f1aedcd720a7e6/FLAG5df68146a [2018-10-24 12:38:11,387 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/baa809f1b/25acf942a4fc4c63b6f1aedcd720a7e6 [2018-10-24 12:38:11,398 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-24 12:38:11,399 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-24 12:38:11,400 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-24 12:38:11,400 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-24 12:38:11,404 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-24 12:38:11,405 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 12:38:11" (1/1) ... [2018-10-24 12:38:11,408 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62b0e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:38:11, skipping insertion in model container [2018-10-24 12:38:11,409 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 12:38:11" (1/1) ... [2018-10-24 12:38:11,419 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-24 12:38:11,440 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-24 12:38:11,621 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-24 12:38:11,625 INFO L189 MainTranslator]: Completed pre-run [2018-10-24 12:38:11,643 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-24 12:38:11,660 INFO L193 MainTranslator]: Completed translation [2018-10-24 12:38:11,660 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:38:11 WrapperNode [2018-10-24 12:38:11,660 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-24 12:38:11,661 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-24 12:38:11,664 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-24 12:38:11,664 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-24 12:38:11,674 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:38:11" (1/1) ... [2018-10-24 12:38:11,680 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:38:11" (1/1) ... [2018-10-24 12:38:11,686 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-24 12:38:11,687 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-24 12:38:11,687 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-24 12:38:11,687 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-24 12:38:11,697 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:38:11" (1/1) ... [2018-10-24 12:38:11,698 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:38:11" (1/1) ... [2018-10-24 12:38:11,699 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:38:11" (1/1) ... [2018-10-24 12:38:11,699 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:38:11" (1/1) ... [2018-10-24 12:38:11,702 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:38:11" (1/1) ... [2018-10-24 12:38:11,708 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:38:11" (1/1) ... [2018-10-24 12:38:11,709 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:38:11" (1/1) ... [2018-10-24 12:38:11,711 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-24 12:38:11,712 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-24 12:38:11,712 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-24 12:38:11,712 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-24 12:38:11,713 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:38:11" (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 [2018-10-24 12:38:11,784 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-24 12:38:11,784 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-24 12:38:11,784 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-24 12:38:11,785 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-24 12:38:11,785 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-24 12:38:11,785 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-24 12:38:11,785 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-10-24 12:38:11,785 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-10-24 12:38:12,103 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-24 12:38:12,104 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 12:38:12 BoogieIcfgContainer [2018-10-24 12:38:12,104 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-24 12:38:12,105 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-24 12:38:12,105 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-24 12:38:12,108 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-24 12:38:12,109 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 12:38:11" (1/3) ... [2018-10-24 12:38:12,109 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@746d816f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 12:38:12, skipping insertion in model container [2018-10-24 12:38:12,110 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:38:11" (2/3) ... [2018-10-24 12:38:12,110 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@746d816f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 12:38:12, skipping insertion in model container [2018-10-24 12:38:12,110 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 12:38:12" (3/3) ... [2018-10-24 12:38:12,112 INFO L112 eAbstractionObserver]: Analyzing ICFG half_true-unreach-call_true-termination.i [2018-10-24 12:38:12,122 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-24 12:38:12,131 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-24 12:38:12,148 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-24 12:38:12,181 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-24 12:38:12,182 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-24 12:38:12,182 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-24 12:38:12,182 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-24 12:38:12,182 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-24 12:38:12,182 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-24 12:38:12,183 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-24 12:38:12,183 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-24 12:38:12,201 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2018-10-24 12:38:12,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-10-24 12:38:12,207 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:38:12,208 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 12:38:12,211 INFO L424 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:38:12,217 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:38:12,217 INFO L82 PathProgramCache]: Analyzing trace with hash 439143249, now seen corresponding path program 1 times [2018-10-24 12:38:12,220 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 12:38:12,271 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:38:12,271 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 12:38:12,272 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:38:12,272 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 12:38:12,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:38:12,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:38:12,342 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 12:38:12,342 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-24 12:38:12,342 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 12:38:12,346 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-10-24 12:38:12,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-10-24 12:38:12,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-24 12:38:12,361 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 2 states. [2018-10-24 12:38:12,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:38:12,383 INFO L93 Difference]: Finished difference Result 34 states and 39 transitions. [2018-10-24 12:38:12,383 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-10-24 12:38:12,385 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2018-10-24 12:38:12,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:38:12,394 INFO L225 Difference]: With dead ends: 34 [2018-10-24 12:38:12,394 INFO L226 Difference]: Without dead ends: 15 [2018-10-24 12:38:12,397 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 [2018-10-24 12:38:12,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-10-24 12:38:12,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-10-24 12:38:12,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-10-24 12:38:12,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-10-24 12:38:12,432 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 11 [2018-10-24 12:38:12,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:38:12,433 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2018-10-24 12:38:12,433 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-10-24 12:38:12,433 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2018-10-24 12:38:12,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-10-24 12:38:12,434 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:38:12,434 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 12:38:12,434 INFO L424 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:38:12,435 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:38:12,435 INFO L82 PathProgramCache]: Analyzing trace with hash 299545522, now seen corresponding path program 1 times [2018-10-24 12:38:12,435 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 12:38:12,436 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:38:12,436 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 12:38:12,437 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:38:12,437 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 12:38:12,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:38:12,686 WARN L179 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2018-10-24 12:38:12,818 WARN L179 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 15 [2018-10-24 12:38:12,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:38:12,994 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 12:38:12,994 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-10-24 12:38:12,994 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 12:38:12,996 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-24 12:38:12,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-24 12:38:12,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-10-24 12:38:12,997 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 7 states. [2018-10-24 12:38:13,189 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2018-10-24 12:38:13,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:38:13,347 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions. [2018-10-24 12:38:13,347 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-24 12:38:13,348 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2018-10-24 12:38:13,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:38:13,351 INFO L225 Difference]: With dead ends: 29 [2018-10-24 12:38:13,351 INFO L226 Difference]: Without dead ends: 24 [2018-10-24 12:38:13,352 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2018-10-24 12:38:13,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-10-24 12:38:13,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 17. [2018-10-24 12:38:13,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-10-24 12:38:13,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-10-24 12:38:13,359 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 12 [2018-10-24 12:38:13,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:38:13,360 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2018-10-24 12:38:13,360 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-24 12:38:13,360 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2018-10-24 12:38:13,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-10-24 12:38:13,361 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:38:13,361 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 12:38:13,361 INFO L424 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:38:13,362 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:38:13,362 INFO L82 PathProgramCache]: Analyzing trace with hash 2077692347, now seen corresponding path program 1 times [2018-10-24 12:38:13,362 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 12:38:13,363 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:38:13,363 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 12:38:13,364 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:38:13,364 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 12:38:13,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:38:13,746 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:38:13,747 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:38:13,747 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-24 12:38:13,748 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 17 with the following transitions: [2018-10-24 12:38:13,750 INFO L202 CegarAbsIntRunner]: [0], [4], [8], [12], [15], [17], [20], [24], [31], [34], [36], [42], [43], [44], [46] [2018-10-24 12:38:13,782 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-24 12:38:13,782 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-24 12:38:14,012 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-24 12:38:14,014 INFO L272 AbstractInterpreter]: Visited 15 different actions 23 times. Merged at 4 different actions 4 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 6 variables. [2018-10-24 12:38:14,031 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:38:14,032 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-24 12:38:14,033 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:38:14,033 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 [2018-10-24 12:38:14,044 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 12:38:14,045 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-24 12:38:14,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:38:14,082 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:38:14,256 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:38:14,256 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-24 12:38:14,723 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:38:14,744 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-24 12:38:14,744 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 5] total 14 [2018-10-24 12:38:14,744 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-24 12:38:14,745 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-24 12:38:14,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-24 12:38:14,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2018-10-24 12:38:14,746 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 11 states. [2018-10-24 12:38:15,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:38:15,009 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2018-10-24 12:38:15,010 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-24 12:38:15,010 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 16 [2018-10-24 12:38:15,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:38:15,011 INFO L225 Difference]: With dead ends: 33 [2018-10-24 12:38:15,012 INFO L226 Difference]: Without dead ends: 24 [2018-10-24 12:38:15,012 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2018-10-24 12:38:15,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-10-24 12:38:15,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 21. [2018-10-24 12:38:15,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-10-24 12:38:15,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-10-24 12:38:15,018 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 16 [2018-10-24 12:38:15,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:38:15,018 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2018-10-24 12:38:15,018 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-24 12:38:15,018 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2018-10-24 12:38:15,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-10-24 12:38:15,019 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:38:15,019 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 12:38:15,020 INFO L424 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:38:15,020 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:38:15,020 INFO L82 PathProgramCache]: Analyzing trace with hash -1259125948, now seen corresponding path program 2 times [2018-10-24 12:38:15,020 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 12:38:15,021 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:38:15,022 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 12:38:15,022 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:38:15,022 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 12:38:15,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:38:15,107 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:38:15,107 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:38:15,107 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-24 12:38:15,108 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-24 12:38:15,108 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-24 12:38:15,108 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:38:15,108 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 [2018-10-24 12:38:15,118 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-24 12:38:15,119 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-10-24 12:38:15,131 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2018-10-24 12:38:15,131 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 12:38:15,135 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:38:15,271 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-10-24 12:38:15,271 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-24 12:38:15,354 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-10-24 12:38:15,379 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-10-24 12:38:15,379 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [4] total 9 [2018-10-24 12:38:15,379 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 12:38:15,379 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-24 12:38:15,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-24 12:38:15,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2018-10-24 12:38:15,380 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 5 states. [2018-10-24 12:38:15,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:38:15,426 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2018-10-24 12:38:15,427 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-24 12:38:15,427 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2018-10-24 12:38:15,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:38:15,428 INFO L225 Difference]: With dead ends: 34 [2018-10-24 12:38:15,428 INFO L226 Difference]: Without dead ends: 25 [2018-10-24 12:38:15,429 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2018-10-24 12:38:15,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-10-24 12:38:15,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2018-10-24 12:38:15,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-10-24 12:38:15,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2018-10-24 12:38:15,434 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 20 [2018-10-24 12:38:15,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:38:15,435 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2018-10-24 12:38:15,435 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-24 12:38:15,435 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2018-10-24 12:38:15,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-10-24 12:38:15,436 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:38:15,436 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 12:38:15,436 INFO L424 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:38:15,437 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:38:15,437 INFO L82 PathProgramCache]: Analyzing trace with hash -2068472574, now seen corresponding path program 1 times [2018-10-24 12:38:15,437 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 12:38:15,438 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:38:15,438 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 12:38:15,438 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:38:15,438 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 12:38:15,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:38:15,897 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:38:15,897 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:38:15,898 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-24 12:38:15,898 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 21 with the following transitions: [2018-10-24 12:38:15,898 INFO L202 CegarAbsIntRunner]: [0], [4], [8], [12], [15], [17], [20], [22], [24], [31], [34], [36], [42], [43], [44], [46] [2018-10-24 12:38:15,900 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-24 12:38:15,900 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-24 12:38:16,108 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-24 12:38:16,110 INFO L272 AbstractInterpreter]: Visited 16 different actions 70 times. Merged at 6 different actions 29 times. Widened at 1 different actions 2 times. Found 6 fixpoints after 4 different actions. Largest state had 6 variables. [2018-10-24 12:38:16,158 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:38:16,158 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-24 12:38:16,158 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:38:16,159 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 [2018-10-24 12:38:16,171 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 12:38:16,171 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-24 12:38:16,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:38:16,197 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:38:16,693 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:38:16,693 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-24 12:38:17,496 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:38:17,518 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-24 12:38:17,518 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 12] total 26 [2018-10-24 12:38:17,518 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-24 12:38:17,518 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-24 12:38:17,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-24 12:38:17,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=533, Unknown=0, NotChecked=0, Total=650 [2018-10-24 12:38:17,520 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 17 states. [2018-10-24 12:38:17,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:38:17,922 INFO L93 Difference]: Finished difference Result 55 states and 61 transitions. [2018-10-24 12:38:17,922 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-24 12:38:17,922 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2018-10-24 12:38:17,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:38:17,924 INFO L225 Difference]: With dead ends: 55 [2018-10-24 12:38:17,924 INFO L226 Difference]: Without dead ends: 38 [2018-10-24 12:38:17,926 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=185, Invalid=807, Unknown=0, NotChecked=0, Total=992 [2018-10-24 12:38:17,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-10-24 12:38:17,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2018-10-24 12:38:17,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-24 12:38:17,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2018-10-24 12:38:17,932 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 20 [2018-10-24 12:38:17,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:38:17,933 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2018-10-24 12:38:17,933 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-24 12:38:17,933 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2018-10-24 12:38:17,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-10-24 12:38:17,934 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:38:17,934 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 12:38:17,935 INFO L424 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:38:17,935 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:38:17,935 INFO L82 PathProgramCache]: Analyzing trace with hash 1794670498, now seen corresponding path program 2 times [2018-10-24 12:38:17,935 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 12:38:17,936 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:38:17,936 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 12:38:17,936 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:38:17,937 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 12:38:17,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:38:18,315 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2018-10-24 12:38:18,316 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:38:18,316 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-24 12:38:18,316 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-24 12:38:18,316 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-24 12:38:18,317 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:38:18,317 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 12:38:18,325 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-24 12:38:18,325 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-10-24 12:38:18,347 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-10-24 12:38:18,347 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 12:38:18,351 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:38:18,861 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:38:18,862 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-24 12:38:25,151 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:38:25,172 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-24 12:38:25,172 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17, 17] total 39 [2018-10-24 12:38:25,172 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-24 12:38:25,174 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-10-24 12:38:25,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-10-24 12:38:25,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=1247, Unknown=15, NotChecked=0, Total=1482 [2018-10-24 12:38:25,176 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand 25 states. [2018-10-24 12:38:26,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:38:26,344 INFO L93 Difference]: Finished difference Result 62 states and 69 transitions. [2018-10-24 12:38:26,345 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-24 12:38:26,345 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 36 [2018-10-24 12:38:26,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:38:26,346 INFO L225 Difference]: With dead ends: 62 [2018-10-24 12:38:26,346 INFO L226 Difference]: Without dead ends: 0 [2018-10-24 12:38:26,350 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 46 SyntacticMatches, 5 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 876 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=516, Invalid=2775, Unknown=15, NotChecked=0, Total=3306 [2018-10-24 12:38:26,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-10-24 12:38:26,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-10-24 12:38:26,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-10-24 12:38:26,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-10-24 12:38:26,351 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 36 [2018-10-24 12:38:26,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:38:26,351 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-10-24 12:38:26,351 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-10-24 12:38:26,352 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-10-24 12:38:26,352 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-10-24 12:38:26,357 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-10-24 12:38:26,557 WARN L179 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 20 [2018-10-24 12:38:26,605 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-10-24 12:38:26,605 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-10-24 12:38:26,605 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-10-24 12:38:26,605 INFO L428 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-10-24 12:38:26,605 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-10-24 12:38:26,605 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-10-24 12:38:26,606 INFO L428 ceAbstractionStarter]: At program point mainENTRY(lines 10 22) the Hoare annotation is: true [2018-10-24 12:38:26,606 INFO L425 ceAbstractionStarter]: For program point mainEXIT(lines 10 22) no Hoare annotation was computed. [2018-10-24 12:38:26,606 INFO L425 ceAbstractionStarter]: For program point L20(line 20) no Hoare annotation was computed. [2018-10-24 12:38:26,606 INFO L425 ceAbstractionStarter]: For program point L16(lines 16 18) no Hoare annotation was computed. [2018-10-24 12:38:26,606 INFO L425 ceAbstractionStarter]: For program point L14(line 14) no Hoare annotation was computed. [2018-10-24 12:38:26,606 INFO L425 ceAbstractionStarter]: For program point L15-1(lines 15 19) no Hoare annotation was computed. [2018-10-24 12:38:26,606 INFO L425 ceAbstractionStarter]: For program point mainFINAL(lines 10 22) no Hoare annotation was computed. [2018-10-24 12:38:26,606 INFO L425 ceAbstractionStarter]: For program point L15-3(lines 15 19) no Hoare annotation was computed. [2018-10-24 12:38:26,607 INFO L421 ceAbstractionStarter]: At program point L15-4(lines 15 19) the Hoare annotation is: (let ((.cse0 (* 2 main_~n~0)) (.cse1 (<= main_~n~0 main_~k~0))) (or (and (<= main_~i~0 .cse0) (<= .cse0 main_~i~0) .cse1) (and (<= 0 main_~n~0) (<= main_~n~0 0) (= main_~i~0 0)) (let ((.cse2 (+ main_~i~0 1))) (and (<= .cse2 .cse0) (<= .cse0 .cse2) .cse1)))) [2018-10-24 12:38:26,607 INFO L421 ceAbstractionStarter]: At program point L15-5(lines 15 19) the Hoare annotation is: (and (or (<= main_~n~0 0) (<= main_~n~0 main_~k~0)) (<= main_~k~0 main_~n~0)) [2018-10-24 12:38:26,607 INFO L428 ceAbstractionStarter]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2018-10-24 12:38:26,607 INFO L425 ceAbstractionStarter]: For program point __VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed. [2018-10-24 12:38:26,607 INFO L425 ceAbstractionStarter]: For program point L5(line 5) no Hoare annotation was computed. [2018-10-24 12:38:26,607 INFO L425 ceAbstractionStarter]: For program point L4(lines 4 6) no Hoare annotation was computed. [2018-10-24 12:38:26,607 INFO L425 ceAbstractionStarter]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2018-10-24 12:38:26,608 INFO L425 ceAbstractionStarter]: For program point L4-2(lines 3 8) no Hoare annotation was computed. [2018-10-24 12:38:26,622 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.10 12:38:26 BoogieIcfgContainer [2018-10-24 12:38:26,622 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-24 12:38:26,623 INFO L168 Benchmark]: Toolchain (without parser) took 15224.93 ms. Allocated memory was 1.5 GB in the beginning and 2.4 GB in the end (delta: 888.7 MB). Free memory was 1.4 GB in the beginning and 2.4 GB in the end (delta: -950.7 MB). Peak memory consumption was 598.8 MB. Max. memory is 7.1 GB. [2018-10-24 12:38:26,625 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-24 12:38:26,625 INFO L168 Benchmark]: CACSL2BoogieTranslator took 260.59 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. [2018-10-24 12:38:26,626 INFO L168 Benchmark]: Boogie Procedure Inliner took 25.10 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. [2018-10-24 12:38:26,627 INFO L168 Benchmark]: Boogie Preprocessor took 24.45 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. [2018-10-24 12:38:26,628 INFO L168 Benchmark]: RCFGBuilder took 392.53 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 765.5 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -817.6 MB). Peak memory consumption was 26.8 MB. Max. memory is 7.1 GB. [2018-10-24 12:38:26,629 INFO L168 Benchmark]: TraceAbstraction took 14517.60 ms. Allocated memory was 2.3 GB in the beginning and 2.4 GB in the end (delta: 123.2 MB). Free memory was 2.2 GB in the beginning and 2.4 GB in the end (delta: -143.6 MB). Peak memory consumption was 640.4 MB. Max. memory is 7.1 GB. [2018-10-24 12:38:26,634 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 260.59 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 25.10 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 24.45 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 392.53 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 765.5 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -817.6 MB). Peak memory consumption was 26.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 14517.60 ms. Allocated memory was 2.3 GB in the beginning and 2.4 GB in the end (delta: 123.2 MB). Free memory was 2.2 GB in the beginning and 2.4 GB in the end (delta: -143.6 MB). Peak memory consumption was 640.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 15]: Loop Invariant Derived loop invariant: (((i <= 2 * n && 2 * n <= i) && n <= k) || ((0 <= n && n <= 0) && i == 0)) || ((i + 1 <= 2 * n && 2 * n <= i + 1) && n <= k) - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 22 locations, 1 error locations. SAFE Result, 14.4s OverallTime, 6 OverallIterations, 7 TraceHistogramMax, 2.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.2s HoareAnnotationTime, HoareTripleCheckerStatistics: 87 SDtfs, 66 SDslu, 440 SDs, 0 SdLazy, 620 SolverSat, 38 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 259 GetRequests, 133 SyntacticMatches, 12 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1114 ImplicationChecksByTransitivity, 11.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=38occurred in iteration=5, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.5s AbstIntTime, 2 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 6 MinimizatonAttempts, 13 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 16 PreInvPairs, 30 NumberOfFragments, 59 HoareAnnotationTreeSize, 16 FomulaSimplifications, 204 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 213 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 10.7s InterpolantComputationTime, 207 NumberOfCodeBlocks, 203 NumberOfCodeBlocksAsserted, 17 NumberOfCheckSat, 285 ConstructedInterpolants, 30 QuantifiedInterpolants, 62577 SizeOfPredicates, 16 NumberOfNonLiveVariables, 200 ConjunctsInSsa, 63 ConjunctsInUnsatCore, 14 InterpolantComputations, 4 PerfectInterpolantSequences, 33/270 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...