java -ea -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_compound_exp_cong.epf -i ../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/ValueTerminatedArrayIteration01.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.24-c30ebe1 [2018-12-17 14:12:44,286 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-17 14:12:44,288 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-17 14:12:44,300 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2018-12-17 14:12:44,333 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/array-bench/reach_32bit_compound_exp_cong.epf [2018-12-17 14:12:44,354 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-17 14:12:44,355 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-17 14:12:44,355 INFO L131 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2018-12-17 14:12:44,356 INFO L133 SettingsManager]: * Show backtranslation warnings=false [2018-12-17 14:12:44,356 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-17 14:12:44,356 INFO L133 SettingsManager]: * User list type=DISABLED [2018-12-17 14:12:44,356 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-12-17 14:12:44,357 INFO L133 SettingsManager]: * Explicit value domain=true [2018-12-17 14:12:44,357 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-12-17 14:12:44,357 INFO L133 SettingsManager]: * Octagon Domain=false [2018-12-17 14:12:44,358 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-12-17 14:12:44,358 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-12-17 14:12:44,358 INFO L133 SettingsManager]: * Interval Domain=false [2018-12-17 14:12:44,359 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-12-17 14:12:44,359 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-12-17 14:12:44,359 INFO L133 SettingsManager]: * Use SBE=true [2018-12-17 14:12:44,359 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-17 14:12:44,359 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-17 14:12:44,360 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-17 14:12:44,361 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-17 14:12:44,361 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-17 14:12:44,361 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-12-17 14:12:44,362 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-17 14:12:44,362 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-12-17 14:12:44,362 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-17 14:12:44,362 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-12-17 14:12:44,362 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-12-17 14:12:44,363 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-17 14:12:44,363 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-17 14:12:44,363 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-17 14:12:44,363 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-17 14:12:44,364 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-17 14:12:44,364 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-17 14:12:44,364 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-12-17 14:12:44,364 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-12-17 14:12:44,364 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-17 14:12:44,365 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-12-17 14:12:44,365 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-12-17 14:12:44,365 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-12-17 14:12:44,414 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-17 14:12:44,429 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-17 14:12:44,434 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-17 14:12:44,438 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-12-17 14:12:44,438 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-12-17 14:12:44,439 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/ValueTerminatedArrayIteration01.bpl [2018-12-17 14:12:44,440 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/ValueTerminatedArrayIteration01.bpl' [2018-12-17 14:12:44,486 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-17 14:12:44,487 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-12-17 14:12:44,488 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-17 14:12:44,488 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-17 14:12:44,488 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-17 14:12:44,507 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "ValueTerminatedArrayIteration01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 17.12 02:12:44" (1/1) ... [2018-12-17 14:12:44,519 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "ValueTerminatedArrayIteration01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 17.12 02:12:44" (1/1) ... [2018-12-17 14:12:44,525 WARN L165 Inliner]: Program contained no entry procedure! [2018-12-17 14:12:44,526 WARN L168 Inliner]: Missing entry procedures: [ULTIMATE.start] [2018-12-17 14:12:44,526 WARN L175 Inliner]: Fallback enabled. All procedures will be processed. [2018-12-17 14:12:44,528 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-17 14:12:44,529 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-17 14:12:44,529 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-17 14:12:44,530 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-17 14:12:44,542 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "ValueTerminatedArrayIteration01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 17.12 02:12:44" (1/1) ... [2018-12-17 14:12:44,542 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "ValueTerminatedArrayIteration01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 17.12 02:12:44" (1/1) ... [2018-12-17 14:12:44,543 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "ValueTerminatedArrayIteration01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 17.12 02:12:44" (1/1) ... [2018-12-17 14:12:44,544 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "ValueTerminatedArrayIteration01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 17.12 02:12:44" (1/1) ... [2018-12-17 14:12:44,546 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "ValueTerminatedArrayIteration01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 17.12 02:12:44" (1/1) ... [2018-12-17 14:12:44,551 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "ValueTerminatedArrayIteration01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 17.12 02:12:44" (1/1) ... [2018-12-17 14:12:44,552 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "ValueTerminatedArrayIteration01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 17.12 02:12:44" (1/1) ... [2018-12-17 14:12:44,554 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-17 14:12:44,554 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-17 14:12:44,555 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-17 14:12:44,555 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-17 14:12:44,556 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "ValueTerminatedArrayIteration01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 17.12 02:12:44" (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 [2018-12-17 14:12:44,624 INFO L124 BoogieDeclarations]: Specification and implementation of procedure main given in one single declaration [2018-12-17 14:12:44,624 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-12-17 14:12:44,624 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-12-17 14:12:44,896 INFO L272 CfgBuilder]: Using library mode [2018-12-17 14:12:44,896 INFO L280 CfgBuilder]: Removed 0 assue(true) statements. [2018-12-17 14:12:44,897 INFO L202 PluginConnector]: Adding new model ValueTerminatedArrayIteration01.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 02:12:44 BoogieIcfgContainer [2018-12-17 14:12:44,897 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-17 14:12:44,898 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-17 14:12:44,898 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-17 14:12:44,902 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-17 14:12:44,902 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "ValueTerminatedArrayIteration01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 17.12 02:12:44" (1/2) ... [2018-12-17 14:12:44,903 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75c476e7 and model type ValueTerminatedArrayIteration01.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 02:12:44, skipping insertion in model container [2018-12-17 14:12:44,903 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "ValueTerminatedArrayIteration01.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 02:12:44" (2/2) ... [2018-12-17 14:12:44,905 INFO L112 eAbstractionObserver]: Analyzing ICFG ValueTerminatedArrayIteration01.bpl [2018-12-17 14:12:44,917 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-17 14:12:44,926 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-12-17 14:12:44,944 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-12-17 14:12:44,979 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-17 14:12:44,979 INFO L383 AbstractCegarLoop]: Hoare is true [2018-12-17 14:12:44,979 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-17 14:12:44,980 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-17 14:12:44,980 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-17 14:12:44,980 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-17 14:12:44,980 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-17 14:12:44,980 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-17 14:12:44,997 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states. [2018-12-17 14:12:45,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-12-17 14:12:45,003 INFO L394 BasicCegarLoop]: Found error trace [2018-12-17 14:12:45,004 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-12-17 14:12:45,007 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-17 14:12:45,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-17 14:12:45,014 INFO L82 PathProgramCache]: Analyzing trace with hash 29984, now seen corresponding path program 1 times [2018-12-17 14:12:45,016 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-17 14:12:45,065 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-17 14:12:45,065 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-17 14:12:45,065 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-17 14:12:45,065 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-17 14:12:45,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-17 14:12:45,292 INFO L273 TraceCheckUtils]: 0: Hoare triple {9#true} assume end >= 0;a := a[end := 42];i := 0; {11#(<= i end)} is VALID [2018-12-17 14:12:45,300 INFO L273 TraceCheckUtils]: 1: Hoare triple {11#(<= i end)} assume !(a[i] != 42); {11#(<= i end)} is VALID [2018-12-17 14:12:45,303 INFO L273 TraceCheckUtils]: 2: Hoare triple {11#(<= i end)} assume !(i <= end); {10#false} is VALID [2018-12-17 14:12:45,305 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-17 14:12:45,308 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-17 14:12:45,308 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2018-12-17 14:12:45,308 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-17 14:12:45,314 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2018-12-17 14:12:45,315 INFO L84 Accepts]: Finished accepts. word is accepted. [2018-12-17 14:12:45,319 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 3 states. [2018-12-17 14:12:45,363 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 3 edges. 3 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2018-12-17 14:12:45,364 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-12-17 14:12:45,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-12-17 14:12:45,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-17 14:12:45,378 INFO L87 Difference]: Start difference. First operand 6 states. Second operand 3 states. [2018-12-17 14:12:45,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-17 14:12:45,473 INFO L93 Difference]: Finished difference Result 9 states and 10 transitions. [2018-12-17 14:12:45,473 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-12-17 14:12:45,474 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2018-12-17 14:12:45,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-17 14:12:45,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2018-12-17 14:12:45,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 10 transitions. [2018-12-17 14:12:45,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2018-12-17 14:12:45,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 10 transitions. [2018-12-17 14:12:45,483 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 3 states and 10 transitions. [2018-12-17 14:12:45,541 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 10 edges. 10 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2018-12-17 14:12:45,551 INFO L225 Difference]: With dead ends: 9 [2018-12-17 14:12:45,551 INFO L226 Difference]: Without dead ends: 5 [2018-12-17 14:12:45,555 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-17 14:12:45,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5 states. [2018-12-17 14:12:45,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5 to 5. [2018-12-17 14:12:45,620 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2018-12-17 14:12:45,621 INFO L82 GeneralOperation]: Start isEquivalent. First operand 5 states. Second operand 5 states. [2018-12-17 14:12:45,621 INFO L74 IsIncluded]: Start isIncluded. First operand 5 states. Second operand 5 states. [2018-12-17 14:12:45,622 INFO L87 Difference]: Start difference. First operand 5 states. Second operand 5 states. [2018-12-17 14:12:45,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-17 14:12:45,623 INFO L93 Difference]: Finished difference Result 5 states and 5 transitions. [2018-12-17 14:12:45,624 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states and 5 transitions. [2018-12-17 14:12:45,624 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-12-17 14:12:45,624 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2018-12-17 14:12:45,624 INFO L74 IsIncluded]: Start isIncluded. First operand 5 states. Second operand 5 states. [2018-12-17 14:12:45,625 INFO L87 Difference]: Start difference. First operand 5 states. Second operand 5 states. [2018-12-17 14:12:45,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-17 14:12:45,626 INFO L93 Difference]: Finished difference Result 5 states and 5 transitions. [2018-12-17 14:12:45,626 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states and 5 transitions. [2018-12-17 14:12:45,626 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-12-17 14:12:45,627 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2018-12-17 14:12:45,627 INFO L88 GeneralOperation]: Finished isEquivalent. [2018-12-17 14:12:45,627 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2018-12-17 14:12:45,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-12-17 14:12:45,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 5 transitions. [2018-12-17 14:12:45,630 INFO L78 Accepts]: Start accepts. Automaton has 5 states and 5 transitions. Word has length 3 [2018-12-17 14:12:45,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-17 14:12:45,630 INFO L480 AbstractCegarLoop]: Abstraction has 5 states and 5 transitions. [2018-12-17 14:12:45,631 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-12-17 14:12:45,631 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states and 5 transitions. [2018-12-17 14:12:45,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-12-17 14:12:45,631 INFO L394 BasicCegarLoop]: Found error trace [2018-12-17 14:12:45,632 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-12-17 14:12:45,632 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-17 14:12:45,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-17 14:12:45,632 INFO L82 PathProgramCache]: Analyzing trace with hash 927558, now seen corresponding path program 1 times [2018-12-17 14:12:45,633 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-17 14:12:45,634 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-17 14:12:45,634 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-17 14:12:45,634 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-17 14:12:45,634 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-17 14:12:45,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-17 14:12:46,129 WARN L180 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 13 [2018-12-17 14:12:46,245 INFO L273 TraceCheckUtils]: 0: Hoare triple {42#true} assume end >= 0;a := a[end := 42];i := 0; {44#(and (< i (+ end 1)) (or (= (select a i) 42) (not (= end i))))} is VALID [2018-12-17 14:12:46,261 INFO L273 TraceCheckUtils]: 1: Hoare triple {44#(and (< i (+ end 1)) (or (= (select a i) 42) (not (= end i))))} assume a[i] != 42;i := i + 1; {45#(<= i end)} is VALID [2018-12-17 14:12:46,276 INFO L273 TraceCheckUtils]: 2: Hoare triple {45#(<= i end)} assume !(a[i] != 42); {45#(<= i end)} is VALID [2018-12-17 14:12:46,291 INFO L273 TraceCheckUtils]: 3: Hoare triple {45#(<= i end)} assume !(i <= end); {43#false} is VALID [2018-12-17 14:12:46,292 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-17 14:12:46,292 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-17 14:12:46,292 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-17 14:12:46,295 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2018-12-17 14:12:46,301 INFO L207 CegarAbsIntRunner]: [0], [4], [6], [7] [2018-12-17 14:12:46,340 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-17 14:12:46,341 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-17 14:12:46,550 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-17 14:12:46,551 INFO L272 AbstractInterpreter]: Visited 4 different actions 13 times. Merged at 3 different actions 9 times. Widened at 1 different actions 1 times. Performed 54 root evaluator evaluations with a maximum evaluation depth of 4. Performed 54 inverse root evaluator evaluations with a maximum inverse evaluation depth of 4. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2018-12-17 14:12:46,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-17 14:12:46,559 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-17 14:12:46,559 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-17 14:12:46,559 INFO L193 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 [2018-12-17 14:12:46,569 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-17 14:12:46,569 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-17 14:12:46,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-17 14:12:46,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-17 14:12:46,625 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-17 14:12:46,715 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2018-12-17 14:12:46,724 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-17 14:12:46,733 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-17 14:12:46,734 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2018-12-17 14:12:46,752 WARN L383 uantifierElimination]: Trying to double check SDD result, but SMT solver's response was UNKNOWN. [2018-12-17 14:12:46,752 WARN L384 uantifierElimination]: Input elimination task: ∃ [v_a_5]. (and (<= i 0) (<= 0 end) (= a (store v_a_5 end 42))) [2018-12-17 14:12:46,753 WARN L385 uantifierElimination]: ElimStorePlain result: ∃ []. (and (<= i 0) (<= 0 end) (= 42 (select a end))) [2018-12-17 14:12:46,916 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2018-12-17 14:12:46,954 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-17 14:12:47,000 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-17 14:12:47,001 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:21 [2018-12-17 14:12:47,017 WARN L383 uantifierElimination]: Trying to double check SDD result, but SMT solver's response was UNKNOWN. [2018-12-17 14:12:47,017 WARN L384 uantifierElimination]: Input elimination task: ∃ [a, v_i_7]. (and (<= 0 end) (= 42 (select a end)) (not (= 42 (select a v_i_7))) (<= v_i_7 0) (<= i (+ v_i_7 1))) [2018-12-17 14:12:47,018 WARN L385 uantifierElimination]: ElimStorePlain result: ∃ []. (and (<= 0 end) (let ((.cse0 (<= i 1))) (or (and .cse0 (<= (+ end 1) 0)) (and .cse0 (<= i end))))) [2018-12-17 14:12:47,180 INFO L273 TraceCheckUtils]: 0: Hoare triple {42#true} assume end >= 0;a := a[end := 42];i := 0; {49#(and (<= i 0) (<= 0 end) (= 42 (select a end)))} is VALID [2018-12-17 14:12:47,182 INFO L273 TraceCheckUtils]: 1: Hoare triple {49#(and (<= i 0) (<= 0 end) (= 42 (select a end)))} assume a[i] != 42;i := i + 1; {53#(and (<= 0 end) (<= i 1) (<= i end))} is VALID [2018-12-17 14:12:47,186 INFO L273 TraceCheckUtils]: 2: Hoare triple {53#(and (<= 0 end) (<= i 1) (<= i end))} assume !(a[i] != 42); {53#(and (<= 0 end) (<= i 1) (<= i end))} is VALID [2018-12-17 14:12:47,188 INFO L273 TraceCheckUtils]: 3: Hoare triple {53#(and (<= 0 end) (<= i 1) (<= i end))} assume !(i <= end); {43#false} is VALID [2018-12-17 14:12:47,188 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-17 14:12:47,189 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-17 14:12:47,324 INFO L273 TraceCheckUtils]: 3: Hoare triple {45#(<= i end)} assume !(i <= end); {43#false} is VALID [2018-12-17 14:12:47,326 INFO L273 TraceCheckUtils]: 2: Hoare triple {45#(<= i end)} assume !(a[i] != 42); {45#(<= i end)} is VALID [2018-12-17 14:12:47,328 INFO L273 TraceCheckUtils]: 1: Hoare triple {66#(or (= 42 (select a i)) (< i end))} assume a[i] != 42;i := i + 1; {45#(<= i end)} is VALID [2018-12-17 14:12:47,329 INFO L273 TraceCheckUtils]: 0: Hoare triple {42#true} assume end >= 0;a := a[end := 42];i := 0; {66#(or (= 42 (select a i)) (< i end))} is VALID [2018-12-17 14:12:47,329 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-17 14:12:47,350 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-17 14:12:47,351 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2018-12-17 14:12:47,351 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-17 14:12:47,352 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 4 [2018-12-17 14:12:47,352 INFO L84 Accepts]: Finished accepts. word is accepted. [2018-12-17 14:12:47,352 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 6 states. [2018-12-17 14:12:47,370 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 8 edges. 8 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2018-12-17 14:12:47,370 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-17 14:12:47,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-17 14:12:47,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2018-12-17 14:12:47,372 INFO L87 Difference]: Start difference. First operand 5 states and 5 transitions. Second operand 6 states. [2018-12-17 14:12:47,619 WARN L180 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 16 [2018-12-17 14:12:47,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-17 14:12:47,865 INFO L93 Difference]: Finished difference Result 10 states and 11 transitions. [2018-12-17 14:12:47,866 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-17 14:12:47,866 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 4 [2018-12-17 14:12:47,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-17 14:12:47,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-12-17 14:12:47,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 11 transitions. [2018-12-17 14:12:47,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-12-17 14:12:47,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 11 transitions. [2018-12-17 14:12:47,872 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 6 states and 11 transitions. [2018-12-17 14:12:47,909 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 11 edges. 11 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2018-12-17 14:12:47,910 INFO L225 Difference]: With dead ends: 10 [2018-12-17 14:12:47,910 INFO L226 Difference]: Without dead ends: 7 [2018-12-17 14:12:47,911 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2018-12-17 14:12:47,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-12-17 14:12:47,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-12-17 14:12:47,927 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2018-12-17 14:12:47,928 INFO L82 GeneralOperation]: Start isEquivalent. First operand 7 states. Second operand 7 states. [2018-12-17 14:12:47,928 INFO L74 IsIncluded]: Start isIncluded. First operand 7 states. Second operand 7 states. [2018-12-17 14:12:47,928 INFO L87 Difference]: Start difference. First operand 7 states. Second operand 7 states. [2018-12-17 14:12:47,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-17 14:12:47,930 INFO L93 Difference]: Finished difference Result 7 states and 7 transitions. [2018-12-17 14:12:47,930 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-12-17 14:12:47,930 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-12-17 14:12:47,931 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2018-12-17 14:12:47,931 INFO L74 IsIncluded]: Start isIncluded. First operand 7 states. Second operand 7 states. [2018-12-17 14:12:47,931 INFO L87 Difference]: Start difference. First operand 7 states. Second operand 7 states. [2018-12-17 14:12:47,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-17 14:12:47,932 INFO L93 Difference]: Finished difference Result 7 states and 7 transitions. [2018-12-17 14:12:47,932 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-12-17 14:12:47,933 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-12-17 14:12:47,933 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2018-12-17 14:12:47,933 INFO L88 GeneralOperation]: Finished isEquivalent. [2018-12-17 14:12:47,933 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2018-12-17 14:12:47,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-12-17 14:12:47,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-12-17 14:12:47,934 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 4 [2018-12-17 14:12:47,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-17 14:12:47,935 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2018-12-17 14:12:47,935 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-17 14:12:47,935 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-12-17 14:12:47,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-12-17 14:12:47,936 INFO L394 BasicCegarLoop]: Found error trace [2018-12-17 14:12:47,936 INFO L402 BasicCegarLoop]: trace histogram [3, 1, 1, 1] [2018-12-17 14:12:47,936 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-17 14:12:47,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-17 14:12:47,937 INFO L82 PathProgramCache]: Analyzing trace with hash 891320966, now seen corresponding path program 2 times [2018-12-17 14:12:47,937 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-17 14:12:47,938 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-17 14:12:47,938 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-17 14:12:47,938 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-17 14:12:47,938 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-17 14:12:47,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-17 14:12:48,252 WARN L180 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 10 [2018-12-17 14:12:48,385 INFO L273 TraceCheckUtils]: 0: Hoare triple {110#true} assume end >= 0;a := a[end := 42];i := 0; {112#(and (< i (+ end 1)) (= 42 (select a end)))} is VALID [2018-12-17 14:12:48,388 INFO L273 TraceCheckUtils]: 1: Hoare triple {112#(and (< i (+ end 1)) (= 42 (select a end)))} assume a[i] != 42;i := i + 1; {112#(and (< i (+ end 1)) (= 42 (select a end)))} is VALID [2018-12-17 14:12:48,389 INFO L273 TraceCheckUtils]: 2: Hoare triple {112#(and (< i (+ end 1)) (= 42 (select a end)))} assume a[i] != 42;i := i + 1; {113#(and (< i (+ end 1)) (or (= (select a i) 42) (not (= end i))))} is VALID [2018-12-17 14:12:48,390 INFO L273 TraceCheckUtils]: 3: Hoare triple {113#(and (< i (+ end 1)) (or (= (select a i) 42) (not (= end i))))} assume a[i] != 42;i := i + 1; {114#(<= i end)} is VALID [2018-12-17 14:12:48,390 INFO L273 TraceCheckUtils]: 4: Hoare triple {114#(<= i end)} assume !(a[i] != 42); {114#(<= i end)} is VALID [2018-12-17 14:12:48,391 INFO L273 TraceCheckUtils]: 5: Hoare triple {114#(<= i end)} assume !(i <= end); {111#false} is VALID [2018-12-17 14:12:48,392 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-17 14:12:48,392 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-17 14:12:48,392 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-17 14:12:48,392 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-17 14:12:48,393 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-17 14:12:48,393 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-17 14:12:48,393 INFO L193 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 [2018-12-17 14:12:48,402 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-17 14:12:48,403 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-17 14:12:48,410 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-12-17 14:12:48,410 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-17 14:12:48,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-17 14:12:48,418 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-17 14:12:48,465 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2018-12-17 14:12:48,467 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-17 14:12:48,482 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-17 14:12:48,483 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2018-12-17 14:12:48,484 WARN L383 uantifierElimination]: Trying to double check SDD result, but SMT solver's response was UNKNOWN. [2018-12-17 14:12:48,485 WARN L384 uantifierElimination]: Input elimination task: ∃ [v_a_6]. (and (<= i 0) (<= 0 end) (= a (store v_a_6 end 42))) [2018-12-17 14:12:48,485 WARN L385 uantifierElimination]: ElimStorePlain result: ∃ []. (and (<= i 0) (<= 0 end) (= 42 (select a end))) [2018-12-17 14:12:49,037 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 49 [2018-12-17 14:12:49,078 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 8 xjuncts. [2018-12-17 14:12:49,177 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-17 14:12:49,178 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:45, output treesize:69 [2018-12-17 14:12:49,184 WARN L383 uantifierElimination]: Trying to double check SDD result, but SMT solver's response was UNKNOWN. [2018-12-17 14:12:49,185 WARN L384 uantifierElimination]: Input elimination task: ∃ [a, v_i_9, v_i_10, v_i_11]. (and (<= v_i_9 0) (<= 0 end) (not (= (select a v_i_9) 42)) (<= v_i_10 (+ v_i_9 1)) (<= v_i_11 (+ v_i_10 1)) (<= i (+ v_i_11 1)) (= 42 (select a end)) (not (= 42 (select a v_i_10))) (not (= 42 (select a v_i_11)))) [2018-12-17 14:12:49,185 WARN L385 uantifierElimination]: ElimStorePlain result: ∃ []. (and (<= 0 end) (let ((.cse5 (+ end 1))) (let ((.cse3 (<= i .cse5)) (.cse0 (<= i 3)) (.cse4 (<= i end)) (.cse1 (<= .cse5 0)) (.cse2 (<= end 0))) (or (and (<= end 1) .cse0 .cse1 .cse2) (and (<= i (+ end 2)) .cse3 .cse0 .cse4) (and .cse3 .cse0 .cse4 .cse1) (and .cse0 .cse4 .cse1 .cse2))))) [2018-12-17 14:12:49,247 INFO L273 TraceCheckUtils]: 0: Hoare triple {110#true} assume end >= 0;a := a[end := 42];i := 0; {118#(and (<= i 0) (<= 0 end) (= 42 (select a end)))} is VALID [2018-12-17 14:12:49,248 INFO L273 TraceCheckUtils]: 1: Hoare triple {118#(and (<= i 0) (<= 0 end) (= 42 (select a end)))} assume a[i] != 42;i := i + 1; {122#(and (<= 0 end) (= 42 (select a end)) (exists ((v_i_9 Int)) (and (<= v_i_9 0) (not (= (select a v_i_9) 42)) (<= i (+ v_i_9 1)))))} is VALID [2018-12-17 14:12:49,250 INFO L273 TraceCheckUtils]: 2: Hoare triple {122#(and (<= 0 end) (= 42 (select a end)) (exists ((v_i_9 Int)) (and (<= v_i_9 0) (not (= (select a v_i_9) 42)) (<= i (+ v_i_9 1)))))} assume a[i] != 42;i := i + 1; {126#(and (<= 0 end) (exists ((v_i_10 Int) (v_i_9 Int)) (and (<= v_i_9 0) (not (= (select a v_i_9) 42)) (<= i (+ v_i_10 1)) (<= v_i_10 (+ v_i_9 1)) (not (= 42 (select a v_i_10))))) (= 42 (select a end)))} is VALID [2018-12-17 14:12:49,253 INFO L273 TraceCheckUtils]: 3: Hoare triple {126#(and (<= 0 end) (exists ((v_i_10 Int) (v_i_9 Int)) (and (<= v_i_9 0) (not (= (select a v_i_9) 42)) (<= i (+ v_i_10 1)) (<= v_i_10 (+ v_i_9 1)) (not (= 42 (select a v_i_10))))) (= 42 (select a end)))} assume a[i] != 42;i := i + 1; {130#(and (<= 0 end) (<= i 3) (<= i end))} is VALID [2018-12-17 14:12:49,253 INFO L273 TraceCheckUtils]: 4: Hoare triple {130#(and (<= 0 end) (<= i 3) (<= i end))} assume !(a[i] != 42); {130#(and (<= 0 end) (<= i 3) (<= i end))} is VALID [2018-12-17 14:12:49,254 INFO L273 TraceCheckUtils]: 5: Hoare triple {130#(and (<= 0 end) (<= i 3) (<= i end))} assume !(i <= end); {111#false} is VALID [2018-12-17 14:12:49,254 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-17 14:12:49,255 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-17 14:12:49,388 INFO L273 TraceCheckUtils]: 5: Hoare triple {114#(<= i end)} assume !(i <= end); {111#false} is VALID [2018-12-17 14:12:49,389 INFO L273 TraceCheckUtils]: 4: Hoare triple {114#(<= i end)} assume !(a[i] != 42); {114#(<= i end)} is VALID [2018-12-17 14:12:49,390 INFO L273 TraceCheckUtils]: 3: Hoare triple {143#(or (= 42 (select a i)) (< i end))} assume a[i] != 42;i := i + 1; {114#(<= i end)} is VALID [2018-12-17 14:12:49,392 INFO L273 TraceCheckUtils]: 2: Hoare triple {147#(or (= 42 (select a i)) (forall ((v_i_13 Int)) (or (= (select a v_i_13) 42) (< (+ i 1) v_i_13) (< v_i_13 end))))} assume a[i] != 42;i := i + 1; {143#(or (= 42 (select a i)) (< i end))} is VALID [2018-12-17 14:12:49,395 INFO L273 TraceCheckUtils]: 1: Hoare triple {151#(or (= 42 (select a i)) (forall ((v_i_13 Int) (v_i_14 Int)) (or (= (select a v_i_14) 42) (= (select a v_i_13) 42) (< (+ i 1) v_i_14) (< v_i_13 end) (< (+ v_i_14 1) v_i_13))))} assume a[i] != 42;i := i + 1; {147#(or (= 42 (select a i)) (forall ((v_i_13 Int)) (or (= (select a v_i_13) 42) (< (+ i 1) v_i_13) (< v_i_13 end))))} is VALID [2018-12-17 14:12:49,401 INFO L273 TraceCheckUtils]: 0: Hoare triple {110#true} assume end >= 0;a := a[end := 42];i := 0; {151#(or (= 42 (select a i)) (forall ((v_i_13 Int) (v_i_14 Int)) (or (= (select a v_i_14) 42) (= (select a v_i_13) 42) (< (+ i 1) v_i_14) (< v_i_13 end) (< (+ v_i_14 1) v_i_13))))} is VALID [2018-12-17 14:12:49,402 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-17 14:12:49,420 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-17 14:12:49,421 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4, 4] total 10 [2018-12-17 14:12:49,421 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-17 14:12:49,421 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 6 [2018-12-17 14:12:49,422 INFO L84 Accepts]: Finished accepts. word is accepted. [2018-12-17 14:12:49,422 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 9 states. [2018-12-17 14:12:49,443 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 12 edges. 12 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2018-12-17 14:12:49,443 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-12-17 14:12:49,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-12-17 14:12:49,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=78, Unknown=0, NotChecked=0, Total=132 [2018-12-17 14:12:49,445 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 9 states. [2018-12-17 14:12:49,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-17 14:12:49,588 INFO L93 Difference]: Finished difference Result 9 states and 10 transitions. [2018-12-17 14:12:49,588 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-17 14:12:49,588 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 6 [2018-12-17 14:12:49,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-17 14:12:49,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-12-17 14:12:49,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 10 transitions. [2018-12-17 14:12:49,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-12-17 14:12:49,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 10 transitions. [2018-12-17 14:12:49,591 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 7 states and 10 transitions. [2018-12-17 14:12:49,605 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 10 edges. 10 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2018-12-17 14:12:49,605 INFO L225 Difference]: With dead ends: 9 [2018-12-17 14:12:49,605 INFO L226 Difference]: Without dead ends: 0 [2018-12-17 14:12:49,606 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=66, Invalid=90, Unknown=0, NotChecked=0, Total=156 [2018-12-17 14:12:49,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-12-17 14:12:49,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-12-17 14:12:49,607 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2018-12-17 14:12:49,607 INFO L82 GeneralOperation]: Start isEquivalent. First operand 0 states. Second operand 0 states. [2018-12-17 14:12:49,608 INFO L74 IsIncluded]: Start isIncluded. First operand 0 states. Second operand 0 states. [2018-12-17 14:12:49,608 INFO L87 Difference]: Start difference. First operand 0 states. Second operand 0 states. [2018-12-17 14:12:49,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-17 14:12:49,608 INFO L93 Difference]: Finished difference Result 0 states and 0 transitions. [2018-12-17 14:12:49,609 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-12-17 14:12:49,609 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-12-17 14:12:49,609 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2018-12-17 14:12:49,609 INFO L74 IsIncluded]: Start isIncluded. First operand 0 states. Second operand 0 states. [2018-12-17 14:12:49,609 INFO L87 Difference]: Start difference. First operand 0 states. Second operand 0 states. [2018-12-17 14:12:49,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-17 14:12:49,610 INFO L93 Difference]: Finished difference Result 0 states and 0 transitions. [2018-12-17 14:12:49,610 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-12-17 14:12:49,610 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-12-17 14:12:49,610 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2018-12-17 14:12:49,610 INFO L88 GeneralOperation]: Finished isEquivalent. [2018-12-17 14:12:49,610 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2018-12-17 14:12:49,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-12-17 14:12:49,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-12-17 14:12:49,611 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 6 [2018-12-17 14:12:49,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-17 14:12:49,611 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-12-17 14:12:49,611 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-12-17 14:12:49,611 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-12-17 14:12:49,611 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-12-17 14:12:49,615 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-12-17 14:12:49,670 INFO L444 ceAbstractionStarter]: At program point L17-1(lines 17 19) the Hoare annotation is: (and (< i (+ end 1)) (= 42 (select a end))) [2018-12-17 14:12:49,671 INFO L448 ceAbstractionStarter]: For program point mainENTRY(lines 11 21) no Hoare annotation was computed. [2018-12-17 14:12:49,671 INFO L448 ceAbstractionStarter]: For program point mainFINAL(lines 11 21) no Hoare annotation was computed. [2018-12-17 14:12:49,671 INFO L448 ceAbstractionStarter]: For program point mainErr0ASSERT_VIOLATIONASSERT(line 20) no Hoare annotation was computed. [2018-12-17 14:12:49,671 INFO L448 ceAbstractionStarter]: For program point mainEXIT(lines 11 21) no Hoare annotation was computed. [2018-12-17 14:12:49,671 INFO L448 ceAbstractionStarter]: For program point L20(line 20) no Hoare annotation was computed. [2018-12-17 14:12:49,673 WARN L170 areAnnotationChecker]: mainENTRY has no Hoare annotation [2018-12-17 14:12:49,674 WARN L170 areAnnotationChecker]: L20 has no Hoare annotation [2018-12-17 14:12:49,675 WARN L170 areAnnotationChecker]: L20 has no Hoare annotation [2018-12-17 14:12:49,675 WARN L170 areAnnotationChecker]: L20 has no Hoare annotation [2018-12-17 14:12:49,675 WARN L170 areAnnotationChecker]: mainFINAL has no Hoare annotation [2018-12-17 14:12:49,675 INFO L163 areAnnotationChecker]: CFG has 1 edges. 1 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. 0 times interpolants missing. [2018-12-17 14:12:49,681 INFO L202 PluginConnector]: Adding new model ValueTerminatedArrayIteration01.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.12 02:12:49 BoogieIcfgContainer [2018-12-17 14:12:49,681 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-12-17 14:12:49,683 INFO L168 Benchmark]: Toolchain (without parser) took 5196.54 ms. Allocated memory was 1.6 GB in the beginning and 2.3 GB in the end (delta: 713.0 MB). Free memory was 1.5 GB in the beginning and 2.1 GB in the end (delta: -585.1 MB). Peak memory consumption was 128.0 MB. Max. memory is 7.1 GB. [2018-12-17 14:12:49,684 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.22 ms. Allocated memory is still 1.6 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-12-17 14:12:49,685 INFO L168 Benchmark]: Boogie Procedure Inliner took 40.77 ms. Allocated memory is still 1.6 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-12-17 14:12:49,685 INFO L168 Benchmark]: Boogie Preprocessor took 24.81 ms. Allocated memory is still 1.6 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-12-17 14:12:49,686 INFO L168 Benchmark]: RCFGBuilder took 342.44 ms. Allocated memory is still 1.6 GB. Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-12-17 14:12:49,687 INFO L168 Benchmark]: TraceAbstraction took 4783.64 ms. Allocated memory was 1.6 GB in the beginning and 2.3 GB in the end (delta: 713.0 MB). Free memory was 1.5 GB in the beginning and 2.1 GB in the end (delta: -606.2 MB). Peak memory consumption was 106.8 MB. Max. memory is 7.1 GB. [2018-12-17 14:12:49,691 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - GenericResult: Assertions are enabled Assertions are enabled - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.22 ms. Allocated memory is still 1.6 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 40.77 ms. Allocated memory is still 1.6 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 24.81 ms. Allocated memory is still 1.6 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 342.44 ms. Allocated memory is still 1.6 GB. Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 4783.64 ms. Allocated memory was 1.6 GB in the beginning and 2.3 GB in the end (delta: 713.0 MB). Free memory was 1.5 GB in the beginning and 2.1 GB in the end (delta: -606.2 MB). Peak memory consumption was 106.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 20]: 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: 17]: Loop Invariant Derived loop invariant: i < end + 1 && 42 == a[end] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 6 locations, 1 error locations. SAFE Result, 4.7s OverallTime, 3 OverallIterations, 3 TraceHistogramMax, 0.8s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 6 SDtfs, 5 SDslu, 0 SDs, 0 SdLazy, 34 SolverSat, 8 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 25 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 1.8s 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, 1 LocationsWithAnnotation, 1 PreInvPairs, 5 NumberOfFragments, 11 HoareAnnotationTreeSize, 1 FomulaSimplifications, 60 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 1 FomulaSimplificationsInter, 55 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 3.0s InterpolantComputationTime, 23 NumberOfCodeBlocks, 23 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 26 ConstructedInterpolants, 4 QuantifiedInterpolants, 1239 SizeOfPredicates, 2 NumberOfNonLiveVariables, 30 ConjunctsInSsa, 16 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...