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/codeblockAssertOrder01.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.24-824f902 [2018-12-19 12:04:11,097 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-19 12:04:11,099 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-19 12:04:11,114 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2018-12-19 12:04:11,171 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 [2018-12-19 12:04:11,197 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-19 12:04:11,197 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-19 12:04:11,198 INFO L131 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2018-12-19 12:04:11,198 INFO L133 SettingsManager]: * Show backtranslation warnings=false [2018-12-19 12:04:11,199 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-19 12:04:11,199 INFO L133 SettingsManager]: * User list type=DISABLED [2018-12-19 12:04:11,199 INFO L133 SettingsManager]: * Inline calls to unimplemented procedures=true [2018-12-19 12:04:11,199 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-12-19 12:04:11,199 INFO L133 SettingsManager]: * Explicit value domain=true [2018-12-19 12:04:11,200 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-12-19 12:04:11,200 INFO L133 SettingsManager]: * Octagon Domain=false [2018-12-19 12:04:11,200 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-12-19 12:04:11,200 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-12-19 12:04:11,200 INFO L133 SettingsManager]: * Interval Domain=false [2018-12-19 12:04:11,201 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-12-19 12:04:11,201 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-12-19 12:04:11,201 INFO L133 SettingsManager]: * Use SBE=true [2018-12-19 12:04:11,202 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-19 12:04:11,202 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-19 12:04:11,202 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-19 12:04:11,202 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-19 12:04:11,202 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-19 12:04:11,202 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-12-19 12:04:11,203 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-19 12:04:11,203 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-12-19 12:04:11,203 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-19 12:04:11,203 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-12-19 12:04:11,203 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-12-19 12:04:11,204 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-19 12:04:11,204 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-19 12:04:11,204 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-19 12:04:11,204 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-19 12:04:11,204 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-19 12:04:11,205 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-19 12:04:11,205 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-12-19 12:04:11,205 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-12-19 12:04:11,205 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-19 12:04:11,205 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-12-19 12:04:11,206 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-12-19 12:04:11,206 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-12-19 12:04:11,252 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-19 12:04:11,264 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-19 12:04:11,268 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-19 12:04:11,269 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-12-19 12:04:11,270 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-12-19 12:04:11,271 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/codeblockAssertOrder01.bpl [2018-12-19 12:04:11,271 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/codeblockAssertOrder01.bpl' [2018-12-19 12:04:11,308 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-19 12:04:11,309 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-12-19 12:04:11,310 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-19 12:04:11,310 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-19 12:04:11,310 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-19 12:04:11,329 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "codeblockAssertOrder01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.12 12:04:11" (1/1) ... [2018-12-19 12:04:11,343 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "codeblockAssertOrder01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.12 12:04:11" (1/1) ... [2018-12-19 12:04:11,351 WARN L165 Inliner]: Program contained no entry procedure! [2018-12-19 12:04:11,352 WARN L168 Inliner]: Missing entry procedures: [ULTIMATE.start] [2018-12-19 12:04:11,352 WARN L175 Inliner]: Fallback enabled. All procedures will be processed. [2018-12-19 12:04:11,355 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-19 12:04:11,356 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-19 12:04:11,356 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-19 12:04:11,356 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-19 12:04:11,368 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "codeblockAssertOrder01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.12 12:04:11" (1/1) ... [2018-12-19 12:04:11,369 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "codeblockAssertOrder01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.12 12:04:11" (1/1) ... [2018-12-19 12:04:11,369 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "codeblockAssertOrder01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.12 12:04:11" (1/1) ... [2018-12-19 12:04:11,375 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "codeblockAssertOrder01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.12 12:04:11" (1/1) ... [2018-12-19 12:04:11,379 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "codeblockAssertOrder01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.12 12:04:11" (1/1) ... [2018-12-19 12:04:11,385 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "codeblockAssertOrder01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.12 12:04:11" (1/1) ... [2018-12-19 12:04:11,386 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "codeblockAssertOrder01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.12 12:04:11" (1/1) ... [2018-12-19 12:04:11,387 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-19 12:04:11,388 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-19 12:04:11,388 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-19 12:04:11,388 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-19 12:04:11,389 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "codeblockAssertOrder01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.12 12:04:11" (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 [2018-12-19 12:04:11,468 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-12-19 12:04:11,468 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-12-19 12:04:11,693 INFO L272 CfgBuilder]: Using library mode [2018-12-19 12:04:11,693 INFO L280 CfgBuilder]: Removed 0 assue(true) statements. [2018-12-19 12:04:11,694 INFO L202 PluginConnector]: Adding new model codeblockAssertOrder01.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.12 12:04:11 BoogieIcfgContainer [2018-12-19 12:04:11,694 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-19 12:04:11,695 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-19 12:04:11,696 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-19 12:04:11,699 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-19 12:04:11,699 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "codeblockAssertOrder01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.12 12:04:11" (1/2) ... [2018-12-19 12:04:11,700 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8e1c1ce and model type codeblockAssertOrder01.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.12 12:04:11, skipping insertion in model container [2018-12-19 12:04:11,701 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "codeblockAssertOrder01.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.12 12:04:11" (2/2) ... [2018-12-19 12:04:11,703 INFO L112 eAbstractionObserver]: Analyzing ICFG codeblockAssertOrder01.bpl [2018-12-19 12:04:11,714 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-19 12:04:11,723 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-12-19 12:04:11,742 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-12-19 12:04:11,776 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-19 12:04:11,777 INFO L383 AbstractCegarLoop]: Hoare is true [2018-12-19 12:04:11,777 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-19 12:04:11,777 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-19 12:04:11,777 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-19 12:04:11,778 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-19 12:04:11,778 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-19 12:04:11,778 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-19 12:04:11,793 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states. [2018-12-19 12:04:11,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-12-19 12:04:11,800 INFO L394 BasicCegarLoop]: Found error trace [2018-12-19 12:04:11,801 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-12-19 12:04:11,804 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-19 12:04:11,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-19 12:04:11,810 INFO L82 PathProgramCache]: Analyzing trace with hash 29984, now seen corresponding path program 1 times [2018-12-19 12:04:11,813 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-19 12:04:11,870 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-19 12:04:11,870 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-19 12:04:11,870 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-19 12:04:11,870 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-19 12:04:11,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-19 12:04:12,089 INFO L273 TraceCheckUtils]: 0: Hoare triple {9#true} i := 0; {11#(<= main_i 0)} is VALID [2018-12-19 12:04:12,099 INFO L273 TraceCheckUtils]: 1: Hoare triple {11#(<= main_i 0)} assume !(i <= 1000);a := a[p := 5];assume p > 41 && p < 43;assume q > 41 && q < 43; {10#false} is VALID [2018-12-19 12:04:12,100 INFO L273 TraceCheckUtils]: 2: Hoare triple {10#false} assume !(a[q] == 5); {10#false} is VALID [2018-12-19 12:04:12,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-19 12:04:12,104 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-19 12:04:12,104 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-12-19 12:04:12,105 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-19 12:04:12,110 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2018-12-19 12:04:12,112 INFO L84 Accepts]: Finished accepts. word is accepted. [2018-12-19 12:04:12,117 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 3 states. [2018-12-19 12:04:12,157 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 3 edges. 3 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2018-12-19 12:04:12,157 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-12-19 12:04:12,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-12-19 12:04:12,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-19 12:04:12,167 INFO L87 Difference]: Start difference. First operand 6 states. Second operand 3 states. [2018-12-19 12:04:12,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-19 12:04:12,258 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-12-19 12:04:12,259 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-12-19 12:04:12,259 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2018-12-19 12:04:12,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-19 12:04:12,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2018-12-19 12:04:12,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 11 transitions. [2018-12-19 12:04:12,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2018-12-19 12:04:12,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 11 transitions. [2018-12-19 12:04:12,281 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 3 states and 11 transitions. [2018-12-19 12:04:12,332 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 11 edges. 11 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2018-12-19 12:04:12,342 INFO L225 Difference]: With dead ends: 11 [2018-12-19 12:04:12,343 INFO L226 Difference]: Without dead ends: 5 [2018-12-19 12:04:12,346 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-19 12:04:12,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5 states. [2018-12-19 12:04:12,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5 to 5. [2018-12-19 12:04:12,392 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2018-12-19 12:04:12,392 INFO L82 GeneralOperation]: Start isEquivalent. First operand 5 states. Second operand 5 states. [2018-12-19 12:04:12,393 INFO L74 IsIncluded]: Start isIncluded. First operand 5 states. Second operand 5 states. [2018-12-19 12:04:12,393 INFO L87 Difference]: Start difference. First operand 5 states. Second operand 5 states. [2018-12-19 12:04:12,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-19 12:04:12,394 INFO L93 Difference]: Finished difference Result 5 states and 5 transitions. [2018-12-19 12:04:12,394 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states and 5 transitions. [2018-12-19 12:04:12,394 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-12-19 12:04:12,395 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2018-12-19 12:04:12,395 INFO L74 IsIncluded]: Start isIncluded. First operand 5 states. Second operand 5 states. [2018-12-19 12:04:12,395 INFO L87 Difference]: Start difference. First operand 5 states. Second operand 5 states. [2018-12-19 12:04:12,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-19 12:04:12,397 INFO L93 Difference]: Finished difference Result 5 states and 5 transitions. [2018-12-19 12:04:12,397 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states and 5 transitions. [2018-12-19 12:04:12,397 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-12-19 12:04:12,397 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2018-12-19 12:04:12,398 INFO L88 GeneralOperation]: Finished isEquivalent. [2018-12-19 12:04:12,398 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2018-12-19 12:04:12,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-12-19 12:04:12,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 5 transitions. [2018-12-19 12:04:12,401 INFO L78 Accepts]: Start accepts. Automaton has 5 states and 5 transitions. Word has length 3 [2018-12-19 12:04:12,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-19 12:04:12,401 INFO L480 AbstractCegarLoop]: Abstraction has 5 states and 5 transitions. [2018-12-19 12:04:12,401 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-12-19 12:04:12,402 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states and 5 transitions. [2018-12-19 12:04:12,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-12-19 12:04:12,402 INFO L394 BasicCegarLoop]: Found error trace [2018-12-19 12:04:12,402 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-12-19 12:04:12,403 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-19 12:04:12,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-19 12:04:12,403 INFO L82 PathProgramCache]: Analyzing trace with hash 927558, now seen corresponding path program 1 times [2018-12-19 12:04:12,403 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-19 12:04:12,405 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-19 12:04:12,405 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-19 12:04:12,405 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-19 12:04:12,405 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-19 12:04:12,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-19 12:04:12,698 INFO L273 TraceCheckUtils]: 0: Hoare triple {44#true} i := 0; {46#(<= main_i 0)} is VALID [2018-12-19 12:04:12,710 INFO L273 TraceCheckUtils]: 1: Hoare triple {46#(<= main_i 0)} assume i <= 1000;i := i + 1; {47#(<= main_i 1)} is VALID [2018-12-19 12:04:12,711 INFO L273 TraceCheckUtils]: 2: Hoare triple {47#(<= main_i 1)} assume !(i <= 1000);a := a[p := 5];assume p > 41 && p < 43;assume q > 41 && q < 43; {45#false} is VALID [2018-12-19 12:04:12,712 INFO L273 TraceCheckUtils]: 3: Hoare triple {45#false} assume !(a[q] == 5); {45#false} is VALID [2018-12-19 12:04:12,712 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-19 12:04:12,713 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-19 12:04:12,713 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-19 12:04:12,714 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2018-12-19 12:04:12,716 INFO L207 CegarAbsIntRunner]: [0], [4], [6], [7] [2018-12-19 12:04:12,754 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-19 12:04:12,755 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-19 12:04:12,959 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-19 12:04:12,960 INFO L272 AbstractInterpreter]: Visited 4 different actions 10 times. Merged at 1 different actions 3 times. Never widened. Performed 48 root evaluator evaluations with a maximum evaluation depth of 3. Performed 48 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2018-12-19 12:04:12,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-19 12:04:12,966 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-19 12:04:12,966 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-19 12:04:12,966 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 [2018-12-19 12:04:12,979 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-19 12:04:12,979 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-19 12:04:12,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-19 12:04:13,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-19 12:04:13,022 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-19 12:04:13,136 INFO L273 TraceCheckUtils]: 0: Hoare triple {44#true} i := 0; {46#(<= main_i 0)} is VALID [2018-12-19 12:04:13,149 INFO L273 TraceCheckUtils]: 1: Hoare triple {46#(<= main_i 0)} assume i <= 1000;i := i + 1; {47#(<= main_i 1)} is VALID [2018-12-19 12:04:13,166 INFO L273 TraceCheckUtils]: 2: Hoare triple {47#(<= main_i 1)} assume !(i <= 1000);a := a[p := 5];assume p > 41 && p < 43;assume q > 41 && q < 43; {45#false} is VALID [2018-12-19 12:04:13,167 INFO L273 TraceCheckUtils]: 3: Hoare triple {45#false} assume !(a[q] == 5); {45#false} is VALID [2018-12-19 12:04:13,167 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-19 12:04:13,168 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-19 12:04:13,441 INFO L273 TraceCheckUtils]: 3: Hoare triple {45#false} assume !(a[q] == 5); {45#false} is VALID [2018-12-19 12:04:13,442 INFO L273 TraceCheckUtils]: 2: Hoare triple {63#(<= main_i 1000)} assume !(i <= 1000);a := a[p := 5];assume p > 41 && p < 43;assume q > 41 && q < 43; {45#false} is VALID [2018-12-19 12:04:13,446 INFO L273 TraceCheckUtils]: 1: Hoare triple {67#(< main_i 1000)} assume i <= 1000;i := i + 1; {63#(<= main_i 1000)} is VALID [2018-12-19 12:04:13,450 INFO L273 TraceCheckUtils]: 0: Hoare triple {44#true} i := 0; {67#(< main_i 1000)} is VALID [2018-12-19 12:04:13,450 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-19 12:04:13,470 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-19 12:04:13,471 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2018-12-19 12:04:13,471 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-19 12:04:13,472 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2018-12-19 12:04:13,472 INFO L84 Accepts]: Finished accepts. word is accepted. [2018-12-19 12:04:13,473 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 4 states. [2018-12-19 12:04:13,479 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 4 edges. 4 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2018-12-19 12:04:13,480 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-12-19 12:04:13,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-12-19 12:04:13,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-12-19 12:04:13,481 INFO L87 Difference]: Start difference. First operand 5 states and 5 transitions. Second operand 4 states. [2018-12-19 12:04:13,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-19 12:04:13,540 INFO L93 Difference]: Finished difference Result 8 states and 8 transitions. [2018-12-19 12:04:13,540 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-12-19 12:04:13,540 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2018-12-19 12:04:13,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-19 12:04:13,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2018-12-19 12:04:13,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 8 transitions. [2018-12-19 12:04:13,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2018-12-19 12:04:13,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 8 transitions. [2018-12-19 12:04:13,543 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 4 states and 8 transitions. [2018-12-19 12:04:13,595 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 8 edges. 8 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2018-12-19 12:04:13,596 INFO L225 Difference]: With dead ends: 8 [2018-12-19 12:04:13,596 INFO L226 Difference]: Without dead ends: 6 [2018-12-19 12:04:13,598 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-12-19 12:04:13,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2018-12-19 12:04:13,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2018-12-19 12:04:13,611 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2018-12-19 12:04:13,611 INFO L82 GeneralOperation]: Start isEquivalent. First operand 6 states. Second operand 6 states. [2018-12-19 12:04:13,612 INFO L74 IsIncluded]: Start isIncluded. First operand 6 states. Second operand 6 states. [2018-12-19 12:04:13,612 INFO L87 Difference]: Start difference. First operand 6 states. Second operand 6 states. [2018-12-19 12:04:13,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-19 12:04:13,613 INFO L93 Difference]: Finished difference Result 6 states and 6 transitions. [2018-12-19 12:04:13,613 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2018-12-19 12:04:13,614 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-12-19 12:04:13,614 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2018-12-19 12:04:13,614 INFO L74 IsIncluded]: Start isIncluded. First operand 6 states. Second operand 6 states. [2018-12-19 12:04:13,614 INFO L87 Difference]: Start difference. First operand 6 states. Second operand 6 states. [2018-12-19 12:04:13,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-19 12:04:13,616 INFO L93 Difference]: Finished difference Result 6 states and 6 transitions. [2018-12-19 12:04:13,616 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2018-12-19 12:04:13,616 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-12-19 12:04:13,616 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2018-12-19 12:04:13,617 INFO L88 GeneralOperation]: Finished isEquivalent. [2018-12-19 12:04:13,617 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2018-12-19 12:04:13,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-12-19 12:04:13,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2018-12-19 12:04:13,618 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2018-12-19 12:04:13,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-19 12:04:13,618 INFO L480 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2018-12-19 12:04:13,619 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-12-19 12:04:13,619 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2018-12-19 12:04:13,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-12-19 12:04:13,619 INFO L394 BasicCegarLoop]: Found error trace [2018-12-19 12:04:13,619 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1, 1] [2018-12-19 12:04:13,620 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-19 12:04:13,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-19 12:04:13,620 INFO L82 PathProgramCache]: Analyzing trace with hash 28752352, now seen corresponding path program 2 times [2018-12-19 12:04:13,621 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-19 12:04:13,622 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-19 12:04:13,622 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-19 12:04:13,622 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-19 12:04:13,622 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-19 12:04:13,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-19 12:04:13,825 INFO L273 TraceCheckUtils]: 0: Hoare triple {102#true} i := 0; {104#(<= main_i 0)} is VALID [2018-12-19 12:04:13,834 INFO L273 TraceCheckUtils]: 1: Hoare triple {104#(<= main_i 0)} assume i <= 1000;i := i + 1; {105#(<= main_i 1)} is VALID [2018-12-19 12:04:13,839 INFO L273 TraceCheckUtils]: 2: Hoare triple {105#(<= main_i 1)} assume i <= 1000;i := i + 1; {106#(<= main_i 2)} is VALID [2018-12-19 12:04:13,840 INFO L273 TraceCheckUtils]: 3: Hoare triple {106#(<= main_i 2)} assume !(i <= 1000);a := a[p := 5];assume p > 41 && p < 43;assume q > 41 && q < 43; {103#false} is VALID [2018-12-19 12:04:13,840 INFO L273 TraceCheckUtils]: 4: Hoare triple {103#false} assume !(a[q] == 5); {103#false} is VALID [2018-12-19 12:04:13,841 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-19 12:04:13,841 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-19 12:04:13,841 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-19 12:04:13,841 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-19 12:04:13,841 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-19 12:04:13,842 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-19 12:04:13,842 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 [2018-12-19 12:04:13,853 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-19 12:04:13,854 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-19 12:04:13,859 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2018-12-19 12:04:13,859 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-19 12:04:13,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-19 12:04:13,871 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-19 12:04:13,950 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 [2018-12-19 12:04:13,974 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-19 12:04:14,019 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-12-19 12:04:14,019 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:19, output treesize:18 [2018-12-19 12:04:14,022 WARN L383 uantifierElimination]: Trying to double check SDD result, but SMT solver's response was UNKNOWN. [2018-12-19 12:04:14,022 WARN L384 uantifierElimination]: Input elimination task: ∃ [v_main_a_6, main_p]. (and (< main_p 43) (< 41 main_q) (< 41 main_p) (= (store v_main_a_6 main_p 5) main_a) (< main_q 43)) [2018-12-19 12:04:14,023 WARN L385 uantifierElimination]: ElimStorePlain result: ∃ [main_p]. (and (< main_p 43) (< 41 main_q) (< 41 main_p) (= (select main_a main_p) 5) (< main_q 43)) [2018-12-19 12:04:14,106 INFO L273 TraceCheckUtils]: 0: Hoare triple {102#true} i := 0; {102#true} is VALID [2018-12-19 12:04:14,107 INFO L273 TraceCheckUtils]: 1: Hoare triple {102#true} assume i <= 1000;i := i + 1; {102#true} is VALID [2018-12-19 12:04:14,108 INFO L273 TraceCheckUtils]: 2: Hoare triple {102#true} assume i <= 1000;i := i + 1; {102#true} is VALID [2018-12-19 12:04:14,124 INFO L273 TraceCheckUtils]: 3: Hoare triple {102#true} assume !(i <= 1000);a := a[p := 5];assume p > 41 && p < 43;assume q > 41 && q < 43; {119#(and (< 41 main_q) (exists ((main_p Int)) (and (< main_p 43) (< 41 main_p) (= (select main_a main_p) 5))) (< main_q 43))} is VALID [2018-12-19 12:04:14,137 INFO L273 TraceCheckUtils]: 4: Hoare triple {119#(and (< 41 main_q) (exists ((main_p Int)) (and (< main_p 43) (< 41 main_p) (= (select main_a main_p) 5))) (< main_q 43))} assume !(a[q] == 5); {103#false} is VALID [2018-12-19 12:04:14,138 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-12-19 12:04:14,139 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-19 12:04:14,286 INFO L273 TraceCheckUtils]: 4: Hoare triple {123#(= (select main_a main_q) 5)} assume !(a[q] == 5); {103#false} is VALID [2018-12-19 12:04:14,293 INFO L273 TraceCheckUtils]: 3: Hoare triple {102#true} assume !(i <= 1000);a := a[p := 5];assume p > 41 && p < 43;assume q > 41 && q < 43; {123#(= (select main_a main_q) 5)} is VALID [2018-12-19 12:04:14,293 INFO L273 TraceCheckUtils]: 2: Hoare triple {102#true} assume i <= 1000;i := i + 1; {102#true} is VALID [2018-12-19 12:04:14,294 INFO L273 TraceCheckUtils]: 1: Hoare triple {102#true} assume i <= 1000;i := i + 1; {102#true} is VALID [2018-12-19 12:04:14,294 INFO L273 TraceCheckUtils]: 0: Hoare triple {102#true} i := 0; {102#true} is VALID [2018-12-19 12:04:14,295 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-12-19 12:04:14,314 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-12-19 12:04:14,314 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [4] total 7 [2018-12-19 12:04:14,314 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-19 12:04:14,314 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2018-12-19 12:04:14,315 INFO L84 Accepts]: Finished accepts. word is accepted. [2018-12-19 12:04:14,315 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 3 states. [2018-12-19 12:04:14,321 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 4 edges. 4 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2018-12-19 12:04:14,321 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-12-19 12:04:14,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-12-19 12:04:14,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2018-12-19 12:04:14,322 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand 3 states. [2018-12-19 12:04:14,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-19 12:04:14,344 INFO L93 Difference]: Finished difference Result 6 states and 6 transitions. [2018-12-19 12:04:14,344 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-12-19 12:04:14,344 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2018-12-19 12:04:14,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-19 12:04:14,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2018-12-19 12:04:14,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 4 transitions. [2018-12-19 12:04:14,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2018-12-19 12:04:14,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 4 transitions. [2018-12-19 12:04:14,346 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 3 states and 4 transitions. [2018-12-19 12:04:14,354 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 4 edges. 4 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2018-12-19 12:04:14,354 INFO L225 Difference]: With dead ends: 6 [2018-12-19 12:04:14,354 INFO L226 Difference]: Without dead ends: 0 [2018-12-19 12:04:14,355 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2018-12-19 12:04:14,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-12-19 12:04:14,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-12-19 12:04:14,356 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2018-12-19 12:04:14,357 INFO L82 GeneralOperation]: Start isEquivalent. First operand 0 states. Second operand 0 states. [2018-12-19 12:04:14,357 INFO L74 IsIncluded]: Start isIncluded. First operand 0 states. Second operand 0 states. [2018-12-19 12:04:14,357 INFO L87 Difference]: Start difference. First operand 0 states. Second operand 0 states. [2018-12-19 12:04:14,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-19 12:04:14,358 INFO L93 Difference]: Finished difference Result 0 states and 0 transitions. [2018-12-19 12:04:14,358 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-12-19 12:04:14,358 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-12-19 12:04:14,358 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2018-12-19 12:04:14,358 INFO L74 IsIncluded]: Start isIncluded. First operand 0 states. Second operand 0 states. [2018-12-19 12:04:14,359 INFO L87 Difference]: Start difference. First operand 0 states. Second operand 0 states. [2018-12-19 12:04:14,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-19 12:04:14,359 INFO L93 Difference]: Finished difference Result 0 states and 0 transitions. [2018-12-19 12:04:14,359 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-12-19 12:04:14,360 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-12-19 12:04:14,360 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2018-12-19 12:04:14,360 INFO L88 GeneralOperation]: Finished isEquivalent. [2018-12-19 12:04:14,360 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2018-12-19 12:04:14,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-12-19 12:04:14,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-12-19 12:04:14,361 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 5 [2018-12-19 12:04:14,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-19 12:04:14,361 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-12-19 12:04:14,361 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-12-19 12:04:14,361 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-12-19 12:04:14,361 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-12-19 12:04:14,434 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-12-19 12:04:14,476 INFO L451 ceAbstractionStarter]: At program point L15-1(lines 15 17) the Hoare annotation is: true [2018-12-19 12:04:14,477 INFO L448 ceAbstractionStarter]: For program point mainENTRY(lines 10 22) no Hoare annotation was computed. [2018-12-19 12:04:14,477 INFO L448 ceAbstractionStarter]: For program point mainFINAL(lines 10 22) no Hoare annotation was computed. [2018-12-19 12:04:14,477 INFO L448 ceAbstractionStarter]: For program point mainErr0ASSERT_VIOLATIONASSERT(line 21) no Hoare annotation was computed. [2018-12-19 12:04:14,477 INFO L448 ceAbstractionStarter]: For program point mainEXIT(lines 10 22) no Hoare annotation was computed. [2018-12-19 12:04:14,477 INFO L448 ceAbstractionStarter]: For program point L21(line 21) no Hoare annotation was computed. [2018-12-19 12:04:14,479 WARN L170 areAnnotationChecker]: mainENTRY has no Hoare annotation [2018-12-19 12:04:14,479 WARN L170 areAnnotationChecker]: L21 has no Hoare annotation [2018-12-19 12:04:14,480 WARN L170 areAnnotationChecker]: L21 has no Hoare annotation [2018-12-19 12:04:14,480 WARN L170 areAnnotationChecker]: L21 has no Hoare annotation [2018-12-19 12:04:14,480 WARN L170 areAnnotationChecker]: mainFINAL has no Hoare annotation [2018-12-19 12:04:14,480 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. [2018-12-19 12:04:14,484 INFO L202 PluginConnector]: Adding new model codeblockAssertOrder01.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.12 12:04:14 BoogieIcfgContainer [2018-12-19 12:04:14,485 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-12-19 12:04:14,486 INFO L168 Benchmark]: Toolchain (without parser) took 3177.58 ms. Allocated memory was 1.5 GB in the beginning and 2.2 GB in the end (delta: 702.5 MB). Free memory was 1.5 GB in the beginning and 2.2 GB in the end (delta: -734.0 MB). There was no memory consumed. Max. memory is 7.1 GB. [2018-12-19 12:04:14,488 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.21 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. [2018-12-19 12:04:14,489 INFO L168 Benchmark]: Boogie Procedure Inliner took 45.20 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. [2018-12-19 12:04:14,490 INFO L168 Benchmark]: Boogie Preprocessor took 31.46 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. [2018-12-19 12:04:14,490 INFO L168 Benchmark]: RCFGBuilder took 306.81 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. [2018-12-19 12:04:14,491 INFO L168 Benchmark]: TraceAbstraction took 2789.23 ms. Allocated memory was 1.5 GB in the beginning and 2.2 GB in the end (delta: 702.5 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -755.1 MB). There was no memory consumed. Max. memory is 7.1 GB. [2018-12-19 12:04:14,495 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 0.21 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 45.20 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 Preprocessor took 31.46 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 306.81 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 2789.23 ms. Allocated memory was 1.5 GB in the beginning and 2.2 GB in the end (delta: 702.5 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -755.1 MB). There was no memory consumed. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 21]: 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: 15]: Loop Invariant Derived loop invariant: true - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 6 locations, 1 error locations. SAFE Result, 2.7s OverallTime, 3 OverallIterations, 2 TraceHistogramMax, 0.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.1s HoareAnnotationTime, HoareTripleCheckerStatistics: 11 SDtfs, 0 SDslu, 7 SDs, 0 SdLazy, 8 SolverSat, 1 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=6occurred in iteration=0, 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, 3 NumberOfFragments, 1 HoareAnnotationTreeSize, 1 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 1 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 1.5s InterpolantComputationTime, 21 NumberOfCodeBlocks, 19 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 23 ConstructedInterpolants, 1 QuantifiedInterpolants, 235 SizeOfPredicates, 5 NumberOfNonLiveVariables, 25 ConjunctsInSsa, 9 ConjunctsInUnsatCore, 7 InterpolantComputations, 3 PerfectInterpolantSequences, 6/12 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...