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 0.1.23-1dbac8b [2018-10-27 09:16:19,298 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-27 09:16:19,300 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-27 09:16:19,312 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-27 09:16:19,312 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-27 09:16:19,313 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-27 09:16:19,314 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-27 09:16:19,316 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-27 09:16:19,317 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-27 09:16:19,318 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-27 09:16:19,319 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-27 09:16:19,319 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-27 09:16:19,320 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-27 09:16:19,321 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-27 09:16:19,322 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-27 09:16:19,323 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-27 09:16:19,324 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-27 09:16:19,326 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-27 09:16:19,328 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-27 09:16:19,329 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-27 09:16:19,330 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-27 09:16:19,331 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-27 09:16:19,334 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-27 09:16:19,334 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-27 09:16:19,334 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-27 09:16:19,335 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-27 09:16:19,336 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-27 09:16:19,337 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-27 09:16:19,338 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-27 09:16:19,339 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-27 09:16:19,339 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-27 09:16:19,340 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... 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[2018-10-27 09:16:19,342 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 [2018-10-27 09:16:19,365 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-27 09:16:19,365 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-27 09:16:19,366 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-27 09:16:19,366 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-27 09:16:19,367 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-27 09:16:19,367 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-27 09:16:19,367 INFO L133 SettingsManager]: * Explicit value domain=true [2018-10-27 09:16:19,367 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-10-27 09:16:19,367 INFO L133 SettingsManager]: * Octagon Domain=false [2018-10-27 09:16:19,368 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-27 09:16:19,372 INFO L133 SettingsManager]: * Log string format=TERM [2018-10-27 09:16:19,372 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-10-27 09:16:19,372 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-27 09:16:19,373 INFO L133 SettingsManager]: * Interval Domain=false [2018-10-27 09:16:19,373 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-27 09:16:19,374 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-27 09:16:19,374 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-27 09:16:19,374 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-27 09:16:19,374 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-27 09:16:19,374 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-27 09:16:19,375 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-27 09:16:19,375 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-27 09:16:19,375 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-27 09:16:19,375 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-27 09:16:19,375 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-27 09:16:19,376 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-27 09:16:19,378 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-27 09:16:19,378 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-27 09:16:19,378 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-27 09:16:19,379 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-27 09:16:19,379 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-10-27 09:16:19,379 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-27 09:16:19,380 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-27 09:16:19,380 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-27 09:16:19,380 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-27 09:16:19,380 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-10-27 09:16:19,452 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-27 09:16:19,469 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-27 09:16:19,473 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-27 09:16:19,475 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-27 09:16:19,475 INFO L276 PluginConnector]: CDTParser initialized [2018-10-27 09:16:19,477 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/loop-new/half_true-unreach-call_true-termination.i [2018-10-27 09:16:19,534 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/690f69f7a/8a1f2589485349a88c50b23855a2222f/FLAG000f18e31 [2018-10-27 09:16:19,952 INFO L298 CDTParser]: Found 1 translation units. [2018-10-27 09:16:19,952 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-new/half_true-unreach-call_true-termination.i [2018-10-27 09:16:19,959 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/690f69f7a/8a1f2589485349a88c50b23855a2222f/FLAG000f18e31 [2018-10-27 09:16:19,978 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/690f69f7a/8a1f2589485349a88c50b23855a2222f [2018-10-27 09:16:19,989 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-27 09:16:19,990 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-27 09:16:19,991 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-27 09:16:19,992 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-27 09:16:19,995 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-27 09:16:19,996 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 09:16:19" (1/1) ... [2018-10-27 09:16:19,999 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f77a5a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 09:16:19, skipping insertion in model container [2018-10-27 09:16:20,000 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 09:16:19" (1/1) ... [2018-10-27 09:16:20,009 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-27 09:16:20,030 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-27 09:16:20,222 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-27 09:16:20,226 INFO L189 MainTranslator]: Completed pre-run [2018-10-27 09:16:20,248 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-27 09:16:20,266 INFO L193 MainTranslator]: Completed translation [2018-10-27 09:16:20,267 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 09:16:20 WrapperNode [2018-10-27 09:16:20,267 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-27 09:16:20,268 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-27 09:16:20,268 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-27 09:16:20,269 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-27 09:16:20,279 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 09:16:20" (1/1) ... [2018-10-27 09:16:20,285 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 09:16:20" (1/1) ... [2018-10-27 09:16:20,291 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-27 09:16:20,291 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-27 09:16:20,291 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-27 09:16:20,292 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-27 09:16:20,301 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 09:16:20" (1/1) ... [2018-10-27 09:16:20,301 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 09:16:20" (1/1) ... [2018-10-27 09:16:20,302 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 09:16:20" (1/1) ... [2018-10-27 09:16:20,302 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 09:16:20" (1/1) ... [2018-10-27 09:16:20,306 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 09:16:20" (1/1) ... [2018-10-27 09:16:20,311 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 09:16:20" (1/1) ... [2018-10-27 09:16:20,312 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 09:16:20" (1/1) ... [2018-10-27 09:16:20,313 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-27 09:16:20,314 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-27 09:16:20,314 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-27 09:16:20,314 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-27 09:16:20,315 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 09:16:20" (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 09:16:20,381 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-27 09:16:20,381 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-27 09:16:20,381 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-27 09:16:20,381 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-27 09:16:20,382 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-27 09:16:20,382 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-27 09:16:20,382 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-10-27 09:16:20,382 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-10-27 09:16:20,800 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-27 09:16:20,800 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 09:16:20 BoogieIcfgContainer [2018-10-27 09:16:20,801 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-27 09:16:20,810 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-27 09:16:20,810 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-27 09:16:20,814 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-27 09:16:20,814 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 09:16:19" (1/3) ... [2018-10-27 09:16:20,818 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a291177 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 09:16:20, skipping insertion in model container [2018-10-27 09:16:20,818 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 09:16:20" (2/3) ... [2018-10-27 09:16:20,819 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a291177 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 09:16:20, skipping insertion in model container [2018-10-27 09:16:20,819 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 09:16:20" (3/3) ... [2018-10-27 09:16:20,824 INFO L112 eAbstractionObserver]: Analyzing ICFG half_true-unreach-call_true-termination.i [2018-10-27 09:16:20,848 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-27 09:16:20,867 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-27 09:16:20,882 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-27 09:16:20,912 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-27 09:16:20,912 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-27 09:16:20,912 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-27 09:16:20,913 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-27 09:16:20,913 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-27 09:16:20,913 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-27 09:16:20,913 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-27 09:16:20,913 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-27 09:16:20,932 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2018-10-27 09:16:20,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-10-27 09:16:20,939 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 09:16:20,940 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 09:16:20,943 INFO L424 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 09:16:20,948 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 09:16:20,948 INFO L82 PathProgramCache]: Analyzing trace with hash 439143249, now seen corresponding path program 1 times [2018-10-27 09:16:20,950 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 09:16:21,002 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 09:16:21,002 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 09:16:21,002 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 09:16:21,002 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 09:16:21,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 09:16:21,065 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 09:16:21,067 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 09:16:21,068 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-27 09:16:21,068 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 09:16:21,072 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-10-27 09:16:21,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-10-27 09:16:21,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-27 09:16:21,086 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 2 states. [2018-10-27 09:16:21,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 09:16:21,109 INFO L93 Difference]: Finished difference Result 34 states and 39 transitions. [2018-10-27 09:16:21,109 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-10-27 09:16:21,111 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2018-10-27 09:16:21,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 09:16:21,120 INFO L225 Difference]: With dead ends: 34 [2018-10-27 09:16:21,120 INFO L226 Difference]: Without dead ends: 15 [2018-10-27 09:16:21,124 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 09:16:21,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-10-27 09:16:21,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-10-27 09:16:21,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-10-27 09:16:21,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-10-27 09:16:21,160 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 11 [2018-10-27 09:16:21,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 09:16:21,161 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2018-10-27 09:16:21,161 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-10-27 09:16:21,161 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2018-10-27 09:16:21,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-10-27 09:16:21,162 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 09:16:21,162 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 09:16:21,163 INFO L424 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 09:16:21,163 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 09:16:21,163 INFO L82 PathProgramCache]: Analyzing trace with hash 299545522, now seen corresponding path program 1 times [2018-10-27 09:16:21,164 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 09:16:21,165 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 09:16:21,165 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 09:16:21,165 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 09:16:21,165 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 09:16:21,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 09:16:21,364 WARN L179 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2018-10-27 09:16:21,669 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 09:16:21,670 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 09:16:21,670 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-10-27 09:16:21,670 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 09:16:21,672 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-27 09:16:21,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-27 09:16:21,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-10-27 09:16:21,673 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 7 states. [2018-10-27 09:16:21,874 WARN L179 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2018-10-27 09:16:22,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 09:16:22,025 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions. [2018-10-27 09:16:22,026 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-27 09:16:22,026 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2018-10-27 09:16:22,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 09:16:22,030 INFO L225 Difference]: With dead ends: 29 [2018-10-27 09:16:22,030 INFO L226 Difference]: Without dead ends: 24 [2018-10-27 09:16:22,032 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 [2018-10-27 09:16:22,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-10-27 09:16:22,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 17. [2018-10-27 09:16:22,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-10-27 09:16:22,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-10-27 09:16:22,041 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 12 [2018-10-27 09:16:22,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 09:16:22,041 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2018-10-27 09:16:22,042 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-27 09:16:22,042 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2018-10-27 09:16:22,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-10-27 09:16:22,043 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 09:16:22,043 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 09:16:22,044 INFO L424 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 09:16:22,044 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 09:16:22,044 INFO L82 PathProgramCache]: Analyzing trace with hash 2077692347, now seen corresponding path program 1 times [2018-10-27 09:16:22,044 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 09:16:22,049 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 09:16:22,050 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 09:16:22,050 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 09:16:22,050 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 09:16:22,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 09:16:22,415 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 09:16:22,418 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 09:16:22,418 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 09:16:22,419 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 17 with the following transitions: [2018-10-27 09:16:22,421 INFO L202 CegarAbsIntRunner]: [0], [4], [8], [12], [15], [17], [20], [24], [31], [34], [36], [42], [43], [44], [46] [2018-10-27 09:16:22,456 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-27 09:16:22,456 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 09:16:22,691 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-27 09:16:22,696 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. [2018-10-27 09:16:22,748 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 09:16:22,751 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-27 09:16:22,751 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 09:16:22,751 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 09:16:22,769 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 09:16:22,769 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-27 09:16:22,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 09:16:22,815 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 09:16:23,034 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 09:16:23,034 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 09:16:23,466 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 09:16:23,487 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-27 09:16:23,488 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 5] total 14 [2018-10-27 09:16:23,488 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-27 09:16:23,488 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-27 09:16:23,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-27 09:16:23,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2018-10-27 09:16:23,490 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 11 states. [2018-10-27 09:16:23,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 09:16:23,726 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2018-10-27 09:16:23,726 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-27 09:16:23,726 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 16 [2018-10-27 09:16:23,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 09:16:23,728 INFO L225 Difference]: With dead ends: 33 [2018-10-27 09:16:23,728 INFO L226 Difference]: Without dead ends: 24 [2018-10-27 09:16:23,729 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 [2018-10-27 09:16:23,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-10-27 09:16:23,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 21. [2018-10-27 09:16:23,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-10-27 09:16:23,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-10-27 09:16:23,734 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 16 [2018-10-27 09:16:23,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 09:16:23,735 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2018-10-27 09:16:23,735 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-27 09:16:23,735 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2018-10-27 09:16:23,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-10-27 09:16:23,736 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 09:16:23,736 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 09:16:23,736 INFO L424 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 09:16:23,736 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 09:16:23,737 INFO L82 PathProgramCache]: Analyzing trace with hash -1259125948, now seen corresponding path program 2 times [2018-10-27 09:16:23,737 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 09:16:23,738 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 09:16:23,738 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 09:16:23,738 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 09:16:23,738 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 09:16:23,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 09:16:23,818 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 09:16:23,818 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 09:16:23,818 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 09:16:23,818 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-27 09:16:23,819 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-27 09:16:23,819 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 09:16:23,819 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 09:16:23,827 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-27 09:16:23,828 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-10-27 09:16:23,841 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2018-10-27 09:16:23,841 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-27 09:16:23,844 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 09:16:23,984 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-10-27 09:16:23,984 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 09:16:24,057 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-10-27 09:16:24,078 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-10-27 09:16:24,078 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [4] total 9 [2018-10-27 09:16:24,079 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 09:16:24,079 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-27 09:16:24,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-27 09:16:24,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2018-10-27 09:16:24,080 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 5 states. [2018-10-27 09:16:24,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 09:16:24,136 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2018-10-27 09:16:24,139 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-27 09:16:24,139 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2018-10-27 09:16:24,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 09:16:24,140 INFO L225 Difference]: With dead ends: 34 [2018-10-27 09:16:24,140 INFO L226 Difference]: Without dead ends: 25 [2018-10-27 09:16:24,141 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 [2018-10-27 09:16:24,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-10-27 09:16:24,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2018-10-27 09:16:24,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-10-27 09:16:24,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2018-10-27 09:16:24,146 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 20 [2018-10-27 09:16:24,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 09:16:24,146 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2018-10-27 09:16:24,147 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-27 09:16:24,147 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2018-10-27 09:16:24,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-10-27 09:16:24,148 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 09:16:24,148 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 09:16:24,148 INFO L424 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 09:16:24,148 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 09:16:24,148 INFO L82 PathProgramCache]: Analyzing trace with hash -2068472574, now seen corresponding path program 1 times [2018-10-27 09:16:24,149 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 09:16:24,149 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 09:16:24,150 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-27 09:16:24,150 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 09:16:24,150 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 09:16:24,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 09:16:24,598 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 09:16:24,598 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 09:16:24,598 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 09:16:24,599 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 21 with the following transitions: [2018-10-27 09:16:24,599 INFO L202 CegarAbsIntRunner]: [0], [4], [8], [12], [15], [17], [20], [22], [24], [31], [34], [36], [42], [43], [44], [46] [2018-10-27 09:16:24,601 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-27 09:16:24,601 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 09:16:24,725 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-27 09:16:24,725 INFO L272 AbstractInterpreter]: Visited 16 different actions 36 times. Merged at 6 different actions 10 times. Never widened. Found 3 fixpoints after 3 different actions. Largest state had 6 variables. [2018-10-27 09:16:24,765 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 09:16:24,765 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-27 09:16:24,765 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 09:16:24,766 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 09:16:24,782 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 09:16:24,782 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-27 09:16:24,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 09:16:24,807 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 09:16:25,337 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 09:16:25,337 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 09:16:26,109 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 09:16:26,130 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-27 09:16:26,131 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 12] total 26 [2018-10-27 09:16:26,131 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-27 09:16:26,131 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-27 09:16:26,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-27 09:16:26,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=533, Unknown=0, NotChecked=0, Total=650 [2018-10-27 09:16:26,134 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 17 states. [2018-10-27 09:16:26,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 09:16:26,571 INFO L93 Difference]: Finished difference Result 55 states and 61 transitions. [2018-10-27 09:16:26,571 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-27 09:16:26,571 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2018-10-27 09:16:26,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 09:16:26,573 INFO L225 Difference]: With dead ends: 55 [2018-10-27 09:16:26,573 INFO L226 Difference]: Without dead ends: 38 [2018-10-27 09:16:26,575 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 [2018-10-27 09:16:26,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-10-27 09:16:26,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2018-10-27 09:16:26,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-27 09:16:26,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2018-10-27 09:16:26,582 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 20 [2018-10-27 09:16:26,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 09:16:26,582 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2018-10-27 09:16:26,582 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-27 09:16:26,582 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2018-10-27 09:16:26,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-10-27 09:16:26,583 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 09:16:26,584 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 09:16:26,584 INFO L424 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 09:16:26,584 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 09:16:26,584 INFO L82 PathProgramCache]: Analyzing trace with hash 1794670498, now seen corresponding path program 2 times [2018-10-27 09:16:26,584 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 09:16:26,585 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 09:16:26,585 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 09:16:26,586 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 09:16:26,586 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 09:16:26,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 09:16:26,922 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2018-10-27 09:16:26,923 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 09:16:26,923 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 09:16:26,923 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-27 09:16:26,923 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-27 09:16:26,923 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 09:16:26,924 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 [2018-10-27 09:16:26,931 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-27 09:16:26,932 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-10-27 09:16:26,950 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-10-27 09:16:26,950 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-27 09:16:26,954 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 09:16:27,445 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 09:16:27,446 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 09:16:33,865 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 09:16:33,893 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-27 09:16:33,894 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17, 17] total 39 [2018-10-27 09:16:33,894 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-27 09:16:33,894 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-10-27 09:16:33,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-10-27 09:16:33,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=1247, Unknown=15, NotChecked=0, Total=1482 [2018-10-27 09:16:33,896 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand 25 states. [2018-10-27 09:16:34,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 09:16:34,968 INFO L93 Difference]: Finished difference Result 62 states and 69 transitions. [2018-10-27 09:16:34,969 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-27 09:16:34,969 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 36 [2018-10-27 09:16:34,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 09:16:34,970 INFO L225 Difference]: With dead ends: 62 [2018-10-27 09:16:34,970 INFO L226 Difference]: Without dead ends: 0 [2018-10-27 09:16:34,972 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 [2018-10-27 09:16:34,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-10-27 09:16:34,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-10-27 09:16:34,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-10-27 09:16:34,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-10-27 09:16:34,973 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 36 [2018-10-27 09:16:34,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 09:16:34,974 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-10-27 09:16:34,974 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-10-27 09:16:34,974 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-10-27 09:16:34,974 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-10-27 09:16:34,979 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-10-27 09:16:35,194 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-10-27 09:16:35,194 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-10-27 09:16:35,194 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-10-27 09:16:35,194 INFO L428 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-10-27 09:16:35,194 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-10-27 09:16:35,194 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-10-27 09:16:35,194 INFO L428 ceAbstractionStarter]: At program point mainENTRY(lines 10 22) the Hoare annotation is: true [2018-10-27 09:16:35,195 INFO L425 ceAbstractionStarter]: For program point mainEXIT(lines 10 22) no Hoare annotation was computed. [2018-10-27 09:16:35,195 INFO L425 ceAbstractionStarter]: For program point L20(line 20) no Hoare annotation was computed. [2018-10-27 09:16:35,195 INFO L425 ceAbstractionStarter]: For program point L16(lines 16 18) no Hoare annotation was computed. [2018-10-27 09:16:35,195 INFO L425 ceAbstractionStarter]: For program point L14(line 14) no Hoare annotation was computed. [2018-10-27 09:16:35,195 INFO L425 ceAbstractionStarter]: For program point L15-1(lines 15 19) no Hoare annotation was computed. [2018-10-27 09:16:35,195 INFO L425 ceAbstractionStarter]: For program point mainFINAL(lines 10 22) no Hoare annotation was computed. [2018-10-27 09:16:35,195 INFO L425 ceAbstractionStarter]: For program point L15-3(lines 15 19) no Hoare annotation was computed. [2018-10-27 09:16:35,195 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)))) [2018-10-27 09:16:35,196 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)) [2018-10-27 09:16:35,196 INFO L428 ceAbstractionStarter]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2018-10-27 09:16:35,196 INFO L425 ceAbstractionStarter]: For program point __VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed. [2018-10-27 09:16:35,196 INFO L425 ceAbstractionStarter]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2018-10-27 09:16:35,196 INFO L425 ceAbstractionStarter]: For program point L5(line 5) no Hoare annotation was computed. [2018-10-27 09:16:35,197 INFO L425 ceAbstractionStarter]: For program point L4(lines 4 6) no Hoare annotation was computed. [2018-10-27 09:16:35,197 INFO L425 ceAbstractionStarter]: For program point L4-2(lines 3 8) no Hoare annotation was computed. [2018-10-27 09:16:35,211 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.10 09:16:35 BoogieIcfgContainer [2018-10-27 09:16:35,212 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-27 09:16:35,213 INFO L168 Benchmark]: Toolchain (without parser) took 15223.11 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 727.7 MB). Free memory was 1.4 GB in the beginning and 1.6 GB in the end (delta: -140.8 MB). Peak memory consumption was 586.9 MB. Max. memory is 7.1 GB. [2018-10-27 09:16:35,214 INFO L168 Benchmark]: CDTParser took 0.28 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 09:16:35,215 INFO L168 Benchmark]: CACSL2BoogieTranslator took 275.98 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 09:16:35,216 INFO L168 Benchmark]: Boogie Procedure Inliner took 22.83 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 09:16:35,216 INFO L168 Benchmark]: Boogie Preprocessor took 22.32 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 09:16:35,217 INFO L168 Benchmark]: RCFGBuilder took 486.96 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 727.7 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -767.3 MB). Peak memory consumption was 26.8 MB. Max. memory is 7.1 GB. [2018-10-27 09:16:35,218 INFO L168 Benchmark]: TraceAbstraction took 14401.68 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 1.6 GB in the end (delta: 615.9 MB). Peak memory consumption was 615.9 MB. Max. memory is 7.1 GB. [2018-10-27 09:16:35,223 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 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 275.98 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 22.83 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 22.32 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 486.96 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 727.7 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -767.3 MB). Peak memory consumption was 26.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 14401.68 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 1.6 GB in the end (delta: 615.9 MB). Peak memory consumption was 615.9 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, 14.2s OverallTime, 6 OverallIterations, 7 TraceHistogramMax, 2.2s 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, 0.4s 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...