java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -s ../../../trunk/examples/settings/ai/array-bench/reach_32bit_array_compound_exp_cong.epf -i ../../../trunk/examples/programs/20170304-DifficultPathPrograms/count_up_down.i_3.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.24-c78c21b [2018-12-03 16:29:58,574 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-03 16:29:58,576 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-03 16:29:58,589 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-03 16:29:58,589 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-03 16:29:58,590 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-03 16:29:58,591 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-03 16:29:58,593 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-03 16:29:58,595 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-03 16:29:58,595 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-03 16:29:58,596 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-12-03 16:29:58,597 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-12-03 16:29:58,598 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-12-03 16:29:58,599 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-12-03 16:29:58,600 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-12-03 16:29:58,600 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-12-03 16:29:58,601 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-12-03 16:29:58,603 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-12-03 16:29:58,605 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-12-03 16:29:58,606 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-12-03 16:29:58,607 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-12-03 16:29:58,609 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-12-03 16:29:58,611 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-12-03 16:29:58,611 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-12-03 16:29:58,612 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-12-03 16:29:58,612 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-12-03 16:29:58,617 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-12-03 16:29:58,618 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-12-03 16:29:58,618 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-12-03 16:29:58,620 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-12-03 16:29:58,620 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-12-03 16:29:58,620 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-12-03 16:29:58,624 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-12-03 16:29:58,624 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-12-03 16:29:58,625 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-12-03 16:29:58,628 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-12-03 16:29:58,628 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/array-bench/reach_32bit_array_compound_exp_cong.epf [2018-12-03 16:29:58,649 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-03 16:29:58,650 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-03 16:29:58,650 INFO L131 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2018-12-03 16:29:58,651 INFO L133 SettingsManager]: * Show backtranslation warnings=false [2018-12-03 16:29:58,651 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-03 16:29:58,651 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-12-03 16:29:58,651 INFO L133 SettingsManager]: * User list type=DISABLED [2018-12-03 16:29:58,652 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-12-03 16:29:58,652 INFO L133 SettingsManager]: * Explicit value domain=true [2018-12-03 16:29:58,652 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-12-03 16:29:58,652 INFO L133 SettingsManager]: * Octagon Domain=false [2018-12-03 16:29:58,652 INFO L133 SettingsManager]: * Abstract domain=ArrayDomain [2018-12-03 16:29:58,653 INFO L133 SettingsManager]: * Log string format=TERM [2018-12-03 16:29:58,653 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-12-03 16:29:58,653 INFO L133 SettingsManager]: * Interval Domain=false [2018-12-03 16:29:58,654 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-12-03 16:29:58,654 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-12-03 16:29:58,654 INFO L133 SettingsManager]: * Use SBE=true [2018-12-03 16:29:58,654 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-03 16:29:58,655 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-03 16:29:58,655 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-03 16:29:58,655 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-03 16:29:58,655 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-03 16:29:58,655 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-12-03 16:29:58,656 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-03 16:29:58,656 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-12-03 16:29:58,656 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-03 16:29:58,656 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-12-03 16:29:58,656 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-12-03 16:29:58,657 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-03 16:29:58,657 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-03 16:29:58,657 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-03 16:29:58,657 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-03 16:29:58,658 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-03 16:29:58,658 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-03 16:29:58,658 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-12-03 16:29:58,658 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-12-03 16:29:58,658 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-03 16:29:58,659 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-12-03 16:29:58,659 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-12-03 16:29:58,659 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-12-03 16:29:58,704 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-03 16:29:58,719 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-03 16:29:58,727 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-03 16:29:58,729 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-12-03 16:29:58,729 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-12-03 16:29:58,730 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/count_up_down.i_3.bpl [2018-12-03 16:29:58,730 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/count_up_down.i_3.bpl' [2018-12-03 16:29:58,777 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-03 16:29:58,779 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-12-03 16:29:58,780 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-03 16:29:58,780 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-03 16:29:58,780 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-03 16:29:58,800 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "count_up_down.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 04:29:58" (1/1) ... [2018-12-03 16:29:58,814 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "count_up_down.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 04:29:58" (1/1) ... [2018-12-03 16:29:58,823 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-03 16:29:58,824 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-03 16:29:58,824 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-03 16:29:58,824 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-03 16:29:58,837 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "count_up_down.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 04:29:58" (1/1) ... [2018-12-03 16:29:58,837 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "count_up_down.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 04:29:58" (1/1) ... [2018-12-03 16:29:58,838 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "count_up_down.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 04:29:58" (1/1) ... [2018-12-03 16:29:58,838 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "count_up_down.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 04:29:58" (1/1) ... [2018-12-03 16:29:58,843 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "count_up_down.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 04:29:58" (1/1) ... [2018-12-03 16:29:58,845 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "count_up_down.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 04:29:58" (1/1) ... [2018-12-03 16:29:58,847 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "count_up_down.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 04:29:58" (1/1) ... [2018-12-03 16:29:58,849 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-03 16:29:58,849 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-03 16:29:58,850 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-03 16:29:58,850 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-03 16:29:58,851 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "count_up_down.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 04:29:58" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-03 16:29:58,922 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-03 16:29:58,922 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-03 16:29:59,178 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-03 16:29:59,178 INFO L280 CfgBuilder]: Removed 1 assue(true) statements. [2018-12-03 16:29:59,178 INFO L202 PluginConnector]: Adding new model count_up_down.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 04:29:59 BoogieIcfgContainer [2018-12-03 16:29:59,179 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-03 16:29:59,180 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-03 16:29:59,180 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-03 16:29:59,183 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-03 16:29:59,183 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "count_up_down.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 04:29:58" (1/2) ... [2018-12-03 16:29:59,184 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a6bd13c and model type count_up_down.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.12 04:29:59, skipping insertion in model container [2018-12-03 16:29:59,185 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "count_up_down.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 04:29:59" (2/2) ... [2018-12-03 16:29:59,187 INFO L112 eAbstractionObserver]: Analyzing ICFG count_up_down.i_3.bpl [2018-12-03 16:29:59,197 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-03 16:29:59,206 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-12-03 16:29:59,226 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-12-03 16:29:59,269 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-03 16:29:59,269 INFO L383 AbstractCegarLoop]: Hoare is true [2018-12-03 16:29:59,269 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-03 16:29:59,269 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-03 16:29:59,271 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-03 16:29:59,271 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-03 16:29:59,271 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-03 16:29:59,271 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-03 16:29:59,290 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states. [2018-12-03 16:29:59,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-12-03 16:29:59,304 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:29:59,305 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-12-03 16:29:59,310 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:29:59,320 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:29:59,320 INFO L82 PathProgramCache]: Analyzing trace with hash 29955, now seen corresponding path program 1 times [2018-12-03 16:29:59,323 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:29:59,380 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:29:59,380 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 16:29:59,380 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:29:59,381 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:29:59,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:30:00,043 WARN L180 SmtUtils]: Spent 492.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 24 [2018-12-03 16:30:00,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:30:00,048 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-03 16:30:00,049 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-12-03 16:30:00,049 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-03 16:30:00,053 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-12-03 16:30:00,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-12-03 16:30:00,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-03 16:30:00,072 INFO L87 Difference]: Start difference. First operand 6 states. Second operand 3 states. [2018-12-03 16:30:00,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:30:00,108 INFO L93 Difference]: Finished difference Result 9 states and 10 transitions. [2018-12-03 16:30:00,109 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-12-03 16:30:00,110 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2018-12-03 16:30:00,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:30:00,122 INFO L225 Difference]: With dead ends: 9 [2018-12-03 16:30:00,122 INFO L226 Difference]: Without dead ends: 5 [2018-12-03 16:30:00,125 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-03 16:30:00,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5 states. [2018-12-03 16:30:00,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5 to 5. [2018-12-03 16:30:00,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-12-03 16:30:00,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 5 transitions. [2018-12-03 16:30:00,160 INFO L78 Accepts]: Start accepts. Automaton has 5 states and 5 transitions. Word has length 3 [2018-12-03 16:30:00,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:30:00,161 INFO L480 AbstractCegarLoop]: Abstraction has 5 states and 5 transitions. [2018-12-03 16:30:00,161 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-12-03 16:30:00,161 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states and 5 transitions. [2018-12-03 16:30:00,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-12-03 16:30:00,162 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:30:00,162 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-12-03 16:30:00,162 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:30:00,162 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:30:00,163 INFO L82 PathProgramCache]: Analyzing trace with hash 930412, now seen corresponding path program 1 times [2018-12-03 16:30:00,163 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:30:00,164 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:30:00,164 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 16:30:00,164 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:30:00,165 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:30:00,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:30:00,864 WARN L180 SmtUtils]: Spent 469.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 26 [2018-12-03 16:30:00,867 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:30:00,867 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:30:00,868 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:30:00,869 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2018-12-03 16:30:00,871 INFO L205 CegarAbsIntRunner]: [0], [5], [7], [9] [2018-12-03 16:30:00,918 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2018-12-03 16:30:00,918 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-03 16:30:01,097 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-03 16:30:01,099 INFO L272 AbstractInterpreter]: Visited 4 different actions 10 times. Merged at 3 different actions 6 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2018-12-03 16:30:01,111 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:30:01,112 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-03 16:30:01,112 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:30:01,112 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 16:30:01,124 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 16:30:01,124 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 16:30:01,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:30:01,159 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:30:01,359 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:30:01,359 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:30:01,462 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:30:01,484 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:30:01,484 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2018-12-03 16:30:01,484 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:30:01,487 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-03 16:30:01,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-03 16:30:01,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-12-03 16:30:01,488 INFO L87 Difference]: Start difference. First operand 5 states and 5 transitions. Second operand 5 states. [2018-12-03 16:30:01,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:30:01,588 INFO L93 Difference]: Finished difference Result 9 states and 10 transitions. [2018-12-03 16:30:01,591 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-03 16:30:01,591 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 4 [2018-12-03 16:30:01,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:30:01,592 INFO L225 Difference]: With dead ends: 9 [2018-12-03 16:30:01,592 INFO L226 Difference]: Without dead ends: 7 [2018-12-03 16:30:01,593 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-12-03 16:30:01,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-12-03 16:30:01,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-12-03 16:30:01,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-12-03 16:30:01,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-12-03 16:30:01,603 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 4 [2018-12-03 16:30:01,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:30:01,604 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2018-12-03 16:30:01,604 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-03 16:30:01,604 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-12-03 16:30:01,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-12-03 16:30:01,604 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:30:01,605 INFO L402 BasicCegarLoop]: trace histogram [3, 1, 1, 1] [2018-12-03 16:30:01,605 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:30:01,605 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:30:01,605 INFO L82 PathProgramCache]: Analyzing trace with hash 894183756, now seen corresponding path program 2 times [2018-12-03 16:30:01,606 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:30:01,607 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:30:01,608 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 16:30:01,609 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:30:01,609 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:30:01,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:30:01,963 WARN L180 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 15 [2018-12-03 16:30:02,127 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:30:02,128 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:30:02,128 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:30:02,128 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:30:02,129 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:30:02,129 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:30:02,129 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 16:30:02,150 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 16:30:02,150 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 16:30:02,212 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-12-03 16:30:02,213 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 16:30:02,215 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:30:02,420 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:30:02,420 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:30:02,718 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:30:02,737 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:30:02,737 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2018-12-03 16:30:02,738 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:30:02,738 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-12-03 16:30:02,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-12-03 16:30:02,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2018-12-03 16:30:02,739 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 9 states. [2018-12-03 16:30:03,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:30:03,125 INFO L93 Difference]: Finished difference Result 8 states and 9 transitions. [2018-12-03 16:30:03,126 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-03 16:30:03,126 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 6 [2018-12-03 16:30:03,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:30:03,127 INFO L225 Difference]: With dead ends: 8 [2018-12-03 16:30:03,127 INFO L226 Difference]: Without dead ends: 0 [2018-12-03 16:30:03,128 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2018-12-03 16:30:03,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-12-03 16:30:03,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-12-03 16:30:03,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-12-03 16:30:03,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-12-03 16:30:03,129 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 6 [2018-12-03 16:30:03,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:30:03,130 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-12-03 16:30:03,130 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-12-03 16:30:03,130 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-12-03 16:30:03,130 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-12-03 16:30:03,135 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-12-03 16:30:03,366 WARN L180 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 29 [2018-12-03 16:30:03,369 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(lines 1 44) no Hoare annotation was computed. [2018-12-03 16:30:03,369 INFO L444 ceAbstractionStarter]: At program point L32(lines 32 42) the Hoare annotation is: false [2018-12-03 16:30:03,370 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startENTRY(lines 1 44) no Hoare annotation was computed. [2018-12-03 16:30:03,370 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(lines 1 44) no Hoare annotation was computed. [2018-12-03 16:30:03,370 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONASSERT(line 43) no Hoare annotation was computed. [2018-12-03 16:30:03,370 INFO L444 ceAbstractionStarter]: At program point L41(lines 19 41) the Hoare annotation is: (or (and (<= 0 ULTIMATE.start_main_~y~5) (= ULTIMATE.start_main_~n~5 ULTIMATE.start_main_~x~5) (<= ULTIMATE.start_main_~y~5 0)) (let ((.cse0 (+ ULTIMATE.start_main_~x~5 1))) (and (<= ULTIMATE.start_main_~y~5 1) (< 0 (mod .cse0 4294967296)) (= ULTIMATE.start_main_~n~5 .cse0) (<= 1 ULTIMATE.start_main_~y~5))) (let ((.cse1 (+ ULTIMATE.start_main_~y~5 ULTIMATE.start_main_~x~5))) (and (<= ULTIMATE.start_main_~n~5 .cse1) (<= ULTIMATE.start_main_~n~5 (+ (* 4294967296 (div ULTIMATE.start_main_~x~5 4294967296)) 4294967295)) (<= 2 ULTIMATE.start_main_~y~5) (<= .cse1 ULTIMATE.start_main_~n~5)))) [2018-12-03 16:30:03,381 INFO L202 PluginConnector]: Adding new model count_up_down.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.12 04:30:03 BoogieIcfgContainer [2018-12-03 16:30:03,382 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-12-03 16:30:03,383 INFO L168 Benchmark]: Toolchain (without parser) took 4604.51 ms. Allocated memory was 1.5 GB in the beginning and 2.2 GB in the end (delta: 684.2 MB). Free memory was 1.5 GB in the beginning and 2.2 GB in the end (delta: -692.3 MB). Peak memory consumption was 177.9 MB. Max. memory is 7.1 GB. [2018-12-03 16:30:03,384 INFO L168 Benchmark]: Boogie PL CUP Parser 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. [2018-12-03 16:30:03,385 INFO L168 Benchmark]: Boogie Procedure Inliner took 43.12 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. [2018-12-03 16:30:03,385 INFO L168 Benchmark]: Boogie Preprocessor took 25.50 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. [2018-12-03 16:30:03,386 INFO L168 Benchmark]: RCFGBuilder took 329.29 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-12-03 16:30:03,387 INFO L168 Benchmark]: TraceAbstraction took 4202.23 ms. Allocated memory was 1.5 GB in the beginning and 2.2 GB in the end (delta: 684.2 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -713.4 MB). Peak memory consumption was 156.7 MB. Max. memory is 7.1 GB. [2018-12-03 16:30:03,392 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser 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. * Boogie Procedure Inliner took 43.12 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. * Boogie Preprocessor took 25.50 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. * RCFGBuilder took 329.29 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 4202.23 ms. Allocated memory was 1.5 GB in the beginning and 2.2 GB in the end (delta: 684.2 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -713.4 MB). Peak memory consumption was 156.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 43]: assertion always holds For all program executions holds that assertion always holds at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 32]: Loop Invariant Derived loop invariant: false - InvariantResult [Line: 19]: Loop Invariant Derived loop invariant: (((0 <= main_~y~5 && main_~n~5 == main_~x~5) && main_~y~5 <= 0) || (((main_~y~5 <= 1 && 0 < (main_~x~5 + 1) % 4294967296) && main_~n~5 == main_~x~5 + 1) && 1 <= main_~y~5)) || (((main_~n~5 <= main_~y~5 + main_~x~5 && main_~n~5 <= 4294967296 * (main_~x~5 / 4294967296) + 4294967295) && 2 <= main_~y~5) && main_~y~5 + main_~x~5 <= main_~n~5) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 6 locations, 1 error locations. SAFE Result, 4.1s OverallTime, 3 OverallIterations, 3 TraceHistogramMax, 0.5s AutomataDifference, 0.0s DeadEndRemovalTime, 0.2s HoareAnnotationTime, HoareTripleCheckerStatistics: 7 SDtfs, 0 SDslu, 3 SDs, 0 SdLazy, 34 SolverSat, 7 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 27 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 2.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=7occurred in iteration=2, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.2s AbstIntTime, 1 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 2 LocationsWithAnnotation, 2 PreInvPairs, 6 NumberOfFragments, 54 HoareAnnotationTreeSize, 2 FomulaSimplifications, 4 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 2 FomulaSimplificationsInter, 160 FormulaSimplificationTreeSizeReductionInter, 0.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 2.5s InterpolantComputationTime, 23 NumberOfCodeBlocks, 23 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 26 ConstructedInterpolants, 0 QuantifiedInterpolants, 1788 SizeOfPredicates, 10 NumberOfNonLiveVariables, 52 ConjunctsInSsa, 43 ConjunctsInUnsatCore, 7 InterpolantComputations, 1 PerfectInterpolantSequences, 1/21 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...