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_array_oct.epf -i ../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/ArrayInit01.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.24-4b9831f [2018-12-23 14:27:16,118 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-23 14:27:16,121 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-23 14:27:16,133 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2018-12-23 14:27:16,186 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/array-bench/reach_32bit_array_oct.epf [2018-12-23 14:27:16,211 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-23 14:27:16,212 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-23 14:27:16,213 INFO L131 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2018-12-23 14:27:16,213 INFO L133 SettingsManager]: * Show backtranslation warnings=false [2018-12-23 14:27:16,213 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-23 14:27:16,213 INFO L133 SettingsManager]: * User list type=DISABLED [2018-12-23 14:27:16,213 INFO L133 SettingsManager]: * Inline calls to unimplemented procedures=true [2018-12-23 14:27:16,214 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-12-23 14:27:16,214 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-12-23 14:27:16,214 INFO L133 SettingsManager]: * Underlying domain=OctagonDomain [2018-12-23 14:27:16,214 INFO L133 SettingsManager]: * Abstract domain=ArrayDomain [2018-12-23 14:27:16,215 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-12-23 14:27:16,217 INFO L133 SettingsManager]: * Interval Domain=false [2018-12-23 14:27:16,218 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-12-23 14:27:16,218 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-12-23 14:27:16,218 INFO L133 SettingsManager]: * Use SBE=true [2018-12-23 14:27:16,219 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-23 14:27:16,219 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-23 14:27:16,219 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-23 14:27:16,219 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-23 14:27:16,219 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-23 14:27:16,221 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-12-23 14:27:16,221 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-23 14:27:16,222 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-12-23 14:27:16,222 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-23 14:27:16,222 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-12-23 14:27:16,222 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-12-23 14:27:16,222 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-23 14:27:16,224 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-23 14:27:16,224 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-23 14:27:16,224 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-23 14:27:16,224 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-23 14:27:16,224 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-23 14:27:16,225 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-12-23 14:27:16,225 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-12-23 14:27:16,225 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-23 14:27:16,226 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-12-23 14:27:16,226 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-12-23 14:27:16,226 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-12-23 14:27:16,282 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-23 14:27:16,297 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-23 14:27:16,303 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-23 14:27:16,305 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-12-23 14:27:16,306 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-12-23 14:27:16,307 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/ArrayInit01.bpl [2018-12-23 14:27:16,307 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/ArrayInit01.bpl' [2018-12-23 14:27:16,357 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-23 14:27:16,359 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-12-23 14:27:16,360 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-23 14:27:16,360 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-23 14:27:16,360 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-23 14:27:16,380 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "ArrayInit01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.12 02:27:16" (1/1) ... [2018-12-23 14:27:16,393 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "ArrayInit01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.12 02:27:16" (1/1) ... [2018-12-23 14:27:16,400 WARN L165 Inliner]: Program contained no entry procedure! [2018-12-23 14:27:16,400 WARN L168 Inliner]: Missing entry procedures: [ULTIMATE.start] [2018-12-23 14:27:16,401 WARN L175 Inliner]: Fallback enabled. All procedures will be processed. [2018-12-23 14:27:16,404 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-23 14:27:16,405 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-23 14:27:16,405 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-23 14:27:16,405 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-23 14:27:16,418 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "ArrayInit01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.12 02:27:16" (1/1) ... [2018-12-23 14:27:16,419 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "ArrayInit01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.12 02:27:16" (1/1) ... [2018-12-23 14:27:16,419 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "ArrayInit01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.12 02:27:16" (1/1) ... [2018-12-23 14:27:16,421 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "ArrayInit01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.12 02:27:16" (1/1) ... [2018-12-23 14:27:16,426 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "ArrayInit01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.12 02:27:16" (1/1) ... [2018-12-23 14:27:16,432 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "ArrayInit01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.12 02:27:16" (1/1) ... [2018-12-23 14:27:16,433 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "ArrayInit01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.12 02:27:16" (1/1) ... [2018-12-23 14:27:16,434 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-23 14:27:16,435 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-23 14:27:16,435 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-23 14:27:16,436 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-23 14:27:16,439 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "ArrayInit01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.12 02:27:16" (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 [2018-12-23 14:27:16,513 INFO L124 BoogieDeclarations]: Specification and implementation of procedure main given in one single declaration [2018-12-23 14:27:16,514 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-12-23 14:27:16,514 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-12-23 14:27:16,728 INFO L272 CfgBuilder]: Using library mode [2018-12-23 14:27:16,728 INFO L280 CfgBuilder]: Removed 0 assue(true) statements. [2018-12-23 14:27:16,729 INFO L202 PluginConnector]: Adding new model ArrayInit01.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 02:27:16 BoogieIcfgContainer [2018-12-23 14:27:16,729 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-23 14:27:16,731 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-23 14:27:16,732 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-23 14:27:16,736 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-23 14:27:16,736 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "ArrayInit01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.12 02:27:16" (1/2) ... [2018-12-23 14:27:16,737 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48d637a3 and model type ArrayInit01.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 02:27:16, skipping insertion in model container [2018-12-23 14:27:16,737 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "ArrayInit01.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 02:27:16" (2/2) ... [2018-12-23 14:27:16,739 INFO L112 eAbstractionObserver]: Analyzing ICFG ArrayInit01.bpl [2018-12-23 14:27:16,750 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-23 14:27:16,763 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-12-23 14:27:16,782 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-12-23 14:27:16,823 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-23 14:27:16,823 INFO L383 AbstractCegarLoop]: Hoare is true [2018-12-23 14:27:16,823 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-23 14:27:16,823 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-23 14:27:16,825 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-23 14:27:16,826 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-23 14:27:16,826 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-23 14:27:16,826 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-23 14:27:16,845 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states. [2018-12-23 14:27:16,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-12-23 14:27:16,852 INFO L394 BasicCegarLoop]: Found error trace [2018-12-23 14:27:16,853 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-12-23 14:27:16,861 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-23 14:27:16,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-23 14:27:16,871 INFO L82 PathProgramCache]: Analyzing trace with hash 29984, now seen corresponding path program 1 times [2018-12-23 14:27:16,875 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-23 14:27:16,923 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-23 14:27:16,923 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-23 14:27:16,923 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-23 14:27:16,923 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-23 14:27:16,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-23 14:27:17,139 INFO L273 TraceCheckUtils]: 0: Hoare triple {9#true} i := 0;assume j == i; {11#(= i 0)} is VALID [2018-12-23 14:27:17,163 INFO L273 TraceCheckUtils]: 1: Hoare triple {11#(= i 0)} assume !(i < n);assume 0 <= r && r < n; {10#false} is VALID [2018-12-23 14:27:17,164 INFO L273 TraceCheckUtils]: 2: Hoare triple {10#false} assume !(a[r] == 0); {10#false} is VALID [2018-12-23 14:27:17,167 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-23 14:27:17,176 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-23 14:27:17,176 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-12-23 14:27:17,177 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-23 14:27:17,188 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2018-12-23 14:27:17,190 INFO L84 Accepts]: Finished accepts. word is accepted. [2018-12-23 14:27:17,194 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 3 states. [2018-12-23 14:27:17,225 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 3 edges. 3 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2018-12-23 14:27:17,226 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-12-23 14:27:17,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-12-23 14:27:17,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-23 14:27:17,238 INFO L87 Difference]: Start difference. First operand 6 states. Second operand 3 states. [2018-12-23 14:27:17,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-23 14:27:17,358 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-12-23 14:27:17,358 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-12-23 14:27:17,358 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2018-12-23 14:27:17,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-23 14:27:17,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2018-12-23 14:27:17,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 11 transitions. [2018-12-23 14:27:17,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2018-12-23 14:27:17,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 11 transitions. [2018-12-23 14:27:17,368 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 3 states and 11 transitions. [2018-12-23 14:27:17,455 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 11 edges. 11 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2018-12-23 14:27:17,465 INFO L225 Difference]: With dead ends: 11 [2018-12-23 14:27:17,465 INFO L226 Difference]: Without dead ends: 5 [2018-12-23 14:27:17,469 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-23 14:27:17,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5 states. [2018-12-23 14:27:17,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5 to 5. [2018-12-23 14:27:17,537 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2018-12-23 14:27:17,538 INFO L82 GeneralOperation]: Start isEquivalent. First operand 5 states. Second operand 5 states. [2018-12-23 14:27:17,539 INFO L74 IsIncluded]: Start isIncluded. First operand 5 states. Second operand 5 states. [2018-12-23 14:27:17,539 INFO L87 Difference]: Start difference. First operand 5 states. Second operand 5 states. [2018-12-23 14:27:17,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-23 14:27:17,541 INFO L93 Difference]: Finished difference Result 5 states and 5 transitions. [2018-12-23 14:27:17,541 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states and 5 transitions. [2018-12-23 14:27:17,541 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-12-23 14:27:17,541 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2018-12-23 14:27:17,542 INFO L74 IsIncluded]: Start isIncluded. First operand 5 states. Second operand 5 states. [2018-12-23 14:27:17,542 INFO L87 Difference]: Start difference. First operand 5 states. Second operand 5 states. [2018-12-23 14:27:17,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-23 14:27:17,543 INFO L93 Difference]: Finished difference Result 5 states and 5 transitions. [2018-12-23 14:27:17,543 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states and 5 transitions. [2018-12-23 14:27:17,544 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-12-23 14:27:17,544 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2018-12-23 14:27:17,544 INFO L88 GeneralOperation]: Finished isEquivalent. [2018-12-23 14:27:17,544 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2018-12-23 14:27:17,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-12-23 14:27:17,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 5 transitions. [2018-12-23 14:27:17,547 INFO L78 Accepts]: Start accepts. Automaton has 5 states and 5 transitions. Word has length 3 [2018-12-23 14:27:17,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-23 14:27:17,548 INFO L480 AbstractCegarLoop]: Abstraction has 5 states and 5 transitions. [2018-12-23 14:27:17,548 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-12-23 14:27:17,548 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states and 5 transitions. [2018-12-23 14:27:17,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-12-23 14:27:17,549 INFO L394 BasicCegarLoop]: Found error trace [2018-12-23 14:27:17,549 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-12-23 14:27:17,549 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-23 14:27:17,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-23 14:27:17,550 INFO L82 PathProgramCache]: Analyzing trace with hash 927558, now seen corresponding path program 1 times [2018-12-23 14:27:17,550 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-23 14:27:17,551 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-23 14:27:17,551 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-23 14:27:17,551 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-23 14:27:17,551 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-23 14:27:17,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-23 14:27:18,248 WARN L181 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 7 [2018-12-23 14:27:18,256 INFO L273 TraceCheckUtils]: 0: Hoare triple {44#true} i := 0;assume j == i; {46#(= i 0)} is VALID [2018-12-23 14:27:18,265 INFO L273 TraceCheckUtils]: 1: Hoare triple {46#(= i 0)} assume i < n;a := a[i := 0];i := i + 1; {47#(and (<= i 1) (= 0 (select a 0)))} is VALID [2018-12-23 14:27:18,266 INFO L273 TraceCheckUtils]: 2: Hoare triple {47#(and (<= i 1) (= 0 (select a 0)))} assume !(i < n);assume 0 <= r && r < n; {48#(and (= r 0) (= 0 (select a r)))} is VALID [2018-12-23 14:27:18,267 INFO L273 TraceCheckUtils]: 3: Hoare triple {48#(and (= r 0) (= 0 (select a r)))} assume !(a[r] == 0); {45#false} is VALID [2018-12-23 14:27:18,268 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-23 14:27:18,268 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-23 14:27:18,268 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-23 14:27:18,270 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2018-12-23 14:27:18,272 INFO L207 CegarAbsIntRunner]: [0], [4], [6], [7] [2018-12-23 14:27:18,329 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2018-12-23 14:27:18,330 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-23 14:27:37,685 WARN L212 ngHoareTripleChecker]: Soundness check inconclusive for the following hoare triple [2018-12-23 14:27:37,686 WARN L217 ngHoareTripleChecker]: Expected: VALID Actual: UNKNOWN [2018-12-23 14:27:37,687 WARN L219 ngHoareTripleChecker]: Solver was "Z3" in version "4.8.3" [2018-12-23 14:27:37,688 WARN L223 ngHoareTripleChecker]: -- [2018-12-23 14:27:37,688 WARN L224 ngHoareTripleChecker]: Pre: {2147483623#(or (forall ((v_idx_115 Int) (v_idx_116 Int) (v_idx_113 Int) (v_idx_114 Int)) (exists ((v_v_273_1 Int) (v_v_274_1 Int) (v_b_25_1 Int) (v_b_24_1 Int) (v_v_272_1 Int) (v_v_275_1 Int)) (and (<= (- v_b_24_1 v_v_273_1) 0) (or (< v_idx_115 v_b_25_1) (= (select c_a v_idx_115) v_v_274_1)) (<= (- v_b_24_1 c_j) 0) (<= (- (- v_b_25_1) (- c_j)) 0) (<= (- (- v_b_25_1) c_i) 0) (<= (- (- c_j) c_j) 0) (<= (- c_j (- c_j)) 0) (<= (- (- v_b_24_1) v_b_25_1) 0) (<= (- (- c_i) v_v_273_1) 0) (<= (- v_v_273_1 (- v_v_273_1)) 0) (= v_v_275_1 (select |c_old(a)| v_idx_116)) (<= (- (- c_i) (- v_v_273_1)) 0) (<= (- v_b_24_1 (- v_v_273_1)) 0) (<= (- (- v_b_25_1) (- v_v_273_1)) 0) (<= (- (- c_i) c_j) 0) (<= (- v_b_24_1 (- c_j)) 0) (<= (- (- c_j) v_v_273_1) 0) (<= (- c_j (- v_v_273_1)) 0) (<= (- (- c_j) (- v_v_273_1)) 0) (<= (- (- v_b_24_1) (- v_v_273_1)) 0) (<= (- (- c_i) c_i) 0) (<= (- (- v_b_24_1) c_i) 0) (<= (- (- v_b_24_1) v_v_273_1) 0) (or (<= v_b_24_1 v_idx_113) (= (select c_a v_idx_113) v_v_272_1)) (<= (- (- v_b_25_1) v_b_25_1) 0) (<= (- (- v_b_24_1) v_b_24_1) 0) (<= (- v_b_24_1 v_b_25_1) 0) (<= (- v_b_24_1 (- v_b_24_1)) 0) (<= (- (- v_b_24_1) (- c_j)) 0) (<= (- (- v_b_25_1) (- c_i)) 0) (<= (- c_j v_v_273_1) 0) (<= (- (- v_v_273_1) v_v_273_1) 0) (<= (- (- v_b_24_1) c_j) 0) (<= (- (- v_b_25_1) c_j) 0) (<= (- v_b_25_1 c_i) 0) (<= (- v_b_24_1 c_i) 0) (<= (- (- v_b_25_1) v_v_273_1) 0) (or (< v_idx_114 v_b_24_1) (= (select c_a v_idx_114) v_v_273_1) (<= v_b_25_1 v_idx_114)) (<= (- (- c_i) (- c_j)) 0)))) (forall ((v_idx_109 Int) (v_idx_111 Int) (v_idx_112 Int) (v_idx_110 Int)) (exists ((v_v_1_1 Int) (v_v_2_1 Int) (v_v_3_1 Int) (v_v_4_1 Int) (v_b_0_1 Int) (v_b_1_1 Int)) (and (<= (- (- v_b_1_1) v_v_3_1) (- 1)) (<= (- v_b_1_1 (- c_j)) 1) (<= (- (- v_b_1_1) (- c_j)) (- 1)) (or (= (select c_a v_idx_112) v_v_4_1) (< v_idx_112 v_b_1_1)) (<= (- (- v_b_1_1) (- v_v_3_1)) (- 1)) (<= (- (- c_i) c_i) (- 2)) (<= (- (- c_i) (- v_v_3_1)) (- 1)) (<= (- (- c_n) c_n) (- 2)) (<= (- c_i c_n) 0) (<= (- (- c_j) c_n) (- 1)) (<= (- v_b_1_1 c_i) 0) (or (<= v_b_0_1 v_idx_110) (= (select c_a v_idx_110) v_v_2_1)) (<= (- (- v_b_0_1) c_j) 0) (<= (- (- v_b_0_1) (- v_b_1_1)) 1) (<= (- v_b_1_1 c_n) 0) (<= (- (- c_i) c_n) (- 2)) (<= (- (- v_b_1_1) v_b_1_1) (- 2)) (<= (- v_b_0_1 v_b_1_1) (- 1)) (<= (- v_b_0_1 c_n) (- 1)) (<= (- v_b_0_1 (- v_v_3_1)) 0) (<= (- c_i (- v_v_3_1)) 1) (<= (- (- c_n) v_v_3_1) (- 1)) (= (select |c_old(a)| v_idx_109) v_v_1_1) (<= (- c_j v_v_3_1) 0) (<= (- v_b_0_1 (- v_b_0_1)) 0) (<= (- v_b_0_1 (- c_j)) 0) (<= (- (- v_b_0_1) c_i) (- 1)) (<= (- c_i v_v_3_1) 1) (<= (- v_b_0_1 c_j) 0) (<= (- (- v_b_0_1) v_b_0_1) 0) (<= (- (- c_i) c_j) (- 1)) (<= (- (- c_i) (- c_j)) (- 1)) (<= (- v_b_1_1 v_v_3_1) 1) (<= (- c_i c_j) 1) (<= (- (- v_b_0_1) v_v_3_1) 0) (<= (- c_i (- c_i)) 2) (<= (- v_b_1_1 c_j) 1) (<= (- (- v_b_1_1) c_n) (- 2)) (<= (- v_b_0_1 c_i) (- 1)) (<= (- (- v_b_0_1) c_n) (- 1)) (<= (- v_b_0_1 (- v_b_1_1)) 1) (<= (- (- v_b_1_1) c_i) (- 2)) (<= (- (- v_b_0_1) (- c_i)) 1) (<= (- (- c_j) c_j) 0) (<= (- (- v_b_0_1) v_b_1_1) (- 1)) (<= (- c_j (- c_j)) 0) (<= (- (- c_n) (- v_v_3_1)) (- 1)) (<= (- v_b_0_1 (- c_i)) 1) (<= (- (- v_v_3_1) v_v_3_1) 0) (<= (- v_b_1_1 (- v_b_1_1)) 2) (<= (- v_b_1_1 (- c_i)) 2) (<= (- (- v_b_1_1) c_j) (- 1)) (<= (- c_i (- c_j)) 1) (<= (- c_j c_n) (- 1)) (<= (- (- c_i) v_v_3_1) (- 1)) (<= (- v_v_3_1 (- v_v_3_1)) 0) (<= (- c_j (- v_v_3_1)) 0) (<= (- (- v_b_1_1) (- c_i)) 0) (or (= (select c_a v_idx_111) v_v_3_1) (<= v_b_1_1 v_idx_111) (< v_idx_111 v_b_0_1)) (<= (- v_b_0_1 v_v_3_1) 0) (<= (- (- v_b_0_1) (- c_j)) 0) (<= (- v_b_1_1 (- v_v_3_1)) 1) (<= (- (- v_b_0_1) (- v_v_3_1)) 0) (<= (- (- c_j) v_v_3_1) 0) (<= (- (- c_j) (- v_v_3_1)) 0)))))} [2018-12-23 14:27:37,689 WARN L228 ngHoareTripleChecker]: Action: assume !(i < n);assume 0 <= r && r < n; [2018-12-23 14:27:37,689 WARN L184 hOps$ForEachOp$OfRef]: ActionStr: (and (< c_r c_n) (not (< c_i c_n)) (<= 0 c_r)) [2018-12-23 14:27:37,690 WARN L230 ngHoareTripleChecker]: Post: {2147483622#(forall ((v_idx_119 Int) (v_idx_117 Int) (v_idx_118 Int) (v_idx_120 Int)) (exists ((v_v_273_1 Int) (v_v_274_1 Int) (v_b_25_1 Int) (v_b_24_1 Int) (v_v_272_1 Int) (v_v_275_1 Int)) (and (<= (- (- v_b_25_1) (- c_j)) (- 1)) (<= (- v_v_273_1 (- v_v_273_1)) 0) (<= (- (- c_i) c_i) (- 2)) (<= (- v_b_24_1 (- v_v_273_1)) 0) (<= (- (- c_n) c_n) (- 2)) (<= (- (- c_j) v_v_273_1) 0) (<= (- c_j (- v_v_273_1)) 0) (<= (- (- c_j) (- v_v_273_1)) 0) (<= (- (- c_j) c_n) (- 1)) (<= (- (- v_b_25_1) (- c_n)) 0) (<= (- (- v_b_24_1) v_v_273_1) 0) (<= (- v_b_24_1 c_n) (- 1)) (<= (- (- c_i) c_n) (- 2)) (<= (- v_b_24_1 (- v_b_24_1)) 0) (<= (- v_b_24_1 c_r) 0) (<= (- c_j c_r) 0) (<= (- (- c_n) v_v_273_1) (- 1)) (<= (- (- v_b_24_1) (- c_j)) 0) (<= (- (- c_i) (- c_n)) 0) (<= (- v_b_24_1 v_b_25_1) (- 1)) (<= (- c_j v_v_273_1) 0) (<= (- (- v_v_273_1) v_v_273_1) 0) (<= (- (- v_b_25_1) c_i) (- 2)) (<= (- (- v_b_24_1) c_j) 0) (<= (- (- c_n) c_r) (- 1)) (<= (- (- c_i) v_v_273_1) (- 1)) (<= (- v_b_25_1 c_i) 0) (<= (- (- c_i) c_j) (- 1)) (<= (- v_b_24_1 c_i) (- 1)) (<= (- (- c_i) (- c_j)) (- 1)) (<= (- (- c_i) (- v_v_273_1)) (- 1)) (<= (- (- c_n) (- v_v_273_1)) (- 1)) (<= (- (- c_n) (- c_r)) (- 1)) (<= (- (- v_b_25_1) c_j) (- 1)) (<= (- (- v_b_25_1) (- c_r)) (- 1)) (<= (- v_b_24_1 v_v_273_1) 0) (<= (- (- v_b_25_1) c_n) (- 2)) (<= (- v_b_24_1 c_j) 0) (or (<= v_b_24_1 v_idx_117) (= (select c_a v_idx_117) v_v_272_1)) (<= (- (- c_j) c_j) 0) (or (< v_idx_118 v_b_24_1) (= (select c_a v_idx_118) v_v_273_1) (<= v_b_25_1 v_idx_118)) (<= (- c_j (- c_j)) 0) (<= (- (- v_b_25_1) v_b_25_1) (- 2)) (<= (- (- v_b_25_1) (- v_v_273_1)) (- 1)) (<= (- v_b_24_1 (- c_j)) 0) (<= (- (- v_b_24_1) (- v_v_273_1)) 0) (<= (- (- v_b_24_1) c_n) (- 1)) (or (= (select c_a v_idx_119) v_v_274_1) (< v_idx_119 v_b_25_1)) (<= (- c_j c_n) (- 1)) (<= (- (- v_b_24_1) v_b_24_1) 0) (<= (- (- v_b_25_1) v_v_273_1) (- 1)) (<= (- (- v_b_24_1) v_b_25_1) (- 1)) (<= (- (- c_i) (- c_r)) (- 1)) (<= (- (- v_b_25_1) (- c_i)) 0) (<= (- (- c_i) c_r) (- 1)) (<= (- (- c_j) c_r) 0) (<= (- (- v_b_24_1) c_i) (- 1)) (<= (- (- c_r) v_v_273_1) 0) (<= (- (- c_r) (- v_v_273_1)) 0) (= (select |c_old(a)| v_idx_120) v_v_275_1) (<= (- (- v_b_24_1) c_r) 0) (<= (- (- c_r) c_r) 0) (<= (- (- v_b_25_1) c_r) (- 1)))))} [2018-12-23 14:27:37,690 WARN L263 ngHoareTripleChecker]: unsat core / model generation is disabled, enable it to get more details [2018-12-23 14:27:37,715 WARN L268 ngHoareTripleChecker]: -- [2018-12-23 14:27:37,715 WARN L269 ngHoareTripleChecker]: Simplified triple [2018-12-23 14:27:43,940 WARN L181 SmtUtils]: Spent 6.22 s on a formula simplification. DAG size of input: 261 DAG size of output: 108 [2018-12-23 14:27:43,941 WARN L270 ngHoareTripleChecker]: Pre: {2147483623#(forall ((v_idx_115 Int) (v_idx_116 Int) (v_idx_113 Int) (v_idx_114 Int)) (exists ((v_v_273_1 Int) (v_v_274_1 Int) (v_b_25_1 Int) (v_b_24_1 Int) (v_v_272_1 Int) (v_v_275_1 Int)) (and (<= (- v_b_24_1 v_v_273_1) 0) (or (< v_idx_115 v_b_25_1) (= (select a v_idx_115) v_v_274_1)) (<= (- v_b_24_1 j) 0) (<= (- (- v_b_25_1) (- j)) 0) (<= (- (- v_b_25_1) i) 0) (<= (- (- j) j) 0) (<= (- j (- j)) 0) (<= (- (- v_b_24_1) v_b_25_1) 0) (<= (- (- i) v_v_273_1) 0) (<= (- v_v_273_1 (- v_v_273_1)) 0) (= v_v_275_1 (select |old(a)| v_idx_116)) (<= (- (- i) (- v_v_273_1)) 0) (<= (- v_b_24_1 (- v_v_273_1)) 0) (<= (- (- v_b_25_1) (- v_v_273_1)) 0) (<= (- (- i) j) 0) (<= (- v_b_24_1 (- j)) 0) (<= (- (- j) v_v_273_1) 0) (<= (- j (- v_v_273_1)) 0) (<= (- (- j) (- v_v_273_1)) 0) (<= (- (- v_b_24_1) (- v_v_273_1)) 0) (<= (- (- i) i) 0) (<= (- (- v_b_24_1) i) 0) (<= (- (- v_b_24_1) v_v_273_1) 0) (or (<= v_b_24_1 v_idx_113) (= (select a v_idx_113) v_v_272_1)) (<= (- (- v_b_25_1) v_b_25_1) 0) (<= (- (- v_b_24_1) v_b_24_1) 0) (<= (- v_b_24_1 v_b_25_1) 0) (<= (- v_b_24_1 (- v_b_24_1)) 0) (<= (- (- v_b_24_1) (- j)) 0) (<= (- (- v_b_25_1) (- i)) 0) (<= (- j v_v_273_1) 0) (<= (- (- v_v_273_1) v_v_273_1) 0) (<= (- (- v_b_24_1) j) 0) (<= (- (- v_b_25_1) j) 0) (<= (- v_b_25_1 i) 0) (<= (- v_b_24_1 i) 0) (<= (- (- v_b_25_1) v_v_273_1) 0) (or (< v_idx_114 v_b_24_1) (= (select a v_idx_114) v_v_273_1) (<= v_b_25_1 v_idx_114)) (<= (- (- i) (- j)) 0))))} [2018-12-23 14:27:43,941 WARN L274 ngHoareTripleChecker]: Action: assume !(i < n);assume 0 <= r && r < n; [2018-12-23 14:27:43,942 WARN L184 hOps$ForEachOp$OfRef]: ActionStr: (and (< c_r c_n) (not (< c_i c_n)) (<= 0 c_r))