java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -s ../../../trunk/examples/settings/ai/array-bench/reach_32bit_compound_exp_cong.epf -i ../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/HierarchicalTraceAbstraction/SkatingStrawberry.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.24-a9d37a5-m [2019-02-28 10:15:35,306 INFO L170 SettingsManager]: Resetting all preferences to default values... [2019-02-28 10:15:35,308 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2019-02-28 10:15:35,323 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-02-28 10:15:35,323 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-02-28 10:15:35,325 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-02-28 10:15:35,326 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-02-28 10:15:35,328 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2019-02-28 10:15:35,331 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-02-28 10:15:35,332 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-02-28 10:15:35,337 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2019-02-28 10:15:35,369 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 [2019-02-28 10:15:35,383 INFO L110 SettingsManager]: Loading preferences was successful [2019-02-28 10:15:35,383 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2019-02-28 10:15:35,384 INFO L131 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2019-02-28 10:15:35,384 INFO L133 SettingsManager]: * Show backtranslation warnings=false [2019-02-28 10:15:35,386 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-02-28 10:15:35,386 INFO L133 SettingsManager]: * User list type=DISABLED [2019-02-28 10:15:35,386 INFO L133 SettingsManager]: * Inline calls to unimplemented procedures=true [2019-02-28 10:15:35,386 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-02-28 10:15:35,387 INFO L133 SettingsManager]: * Explicit value domain=true [2019-02-28 10:15:35,387 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-02-28 10:15:35,387 INFO L133 SettingsManager]: * Octagon Domain=false [2019-02-28 10:15:35,387 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2019-02-28 10:15:35,387 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-02-28 10:15:35,388 INFO L133 SettingsManager]: * Interval Domain=false [2019-02-28 10:15:35,388 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-02-28 10:15:35,388 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2019-02-28 10:15:35,389 INFO L133 SettingsManager]: * Use SBE=true [2019-02-28 10:15:35,390 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-02-28 10:15:35,391 INFO L133 SettingsManager]: * sizeof long=4 [2019-02-28 10:15:35,391 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2019-02-28 10:15:35,391 INFO L133 SettingsManager]: * sizeof POINTER=4 [2019-02-28 10:15:35,391 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2019-02-28 10:15:35,391 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-02-28 10:15:35,391 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-02-28 10:15:35,392 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-02-28 10:15:35,392 INFO L133 SettingsManager]: * sizeof long double=12 [2019-02-28 10:15:35,392 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2019-02-28 10:15:35,392 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-02-28 10:15:35,393 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-02-28 10:15:35,393 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-02-28 10:15:35,393 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2019-02-28 10:15:35,393 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:16092 -smt2 -in -t:200000 [2019-02-28 10:15:35,393 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-02-28 10:15:35,394 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-02-28 10:15:35,394 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-02-28 10:15:35,394 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-02-28 10:15:35,394 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-02-28 10:15:35,394 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:16092 -smt2 -in [2019-02-28 10:15:35,395 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-02-28 10:15:35,395 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-02-28 10:15:35,433 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-02-28 10:15:35,444 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-02-28 10:15:35,447 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-02-28 10:15:35,448 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2019-02-28 10:15:35,449 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2019-02-28 10:15:35,450 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/HierarchicalTraceAbstraction/SkatingStrawberry.bpl [2019-02-28 10:15:35,450 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/HierarchicalTraceAbstraction/SkatingStrawberry.bpl' [2019-02-28 10:15:35,479 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-02-28 10:15:35,481 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-02-28 10:15:35,481 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-02-28 10:15:35,481 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-02-28 10:15:35,481 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2019-02-28 10:15:35,496 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "SkatingStrawberry.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.02 10:15:35" (1/1) ... [2019-02-28 10:15:35,504 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "SkatingStrawberry.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.02 10:15:35" (1/1) ... [2019-02-28 10:15:35,510 WARN L165 Inliner]: Program contained no entry procedure! [2019-02-28 10:15:35,510 WARN L168 Inliner]: Missing entry procedures: [ULTIMATE.start] [2019-02-28 10:15:35,510 WARN L175 Inliner]: Fallback enabled. All procedures will be processed. [2019-02-28 10:15:35,512 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-02-28 10:15:35,513 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-02-28 10:15:35,513 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-02-28 10:15:35,513 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2019-02-28 10:15:35,523 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "SkatingStrawberry.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.02 10:15:35" (1/1) ... [2019-02-28 10:15:35,523 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "SkatingStrawberry.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.02 10:15:35" (1/1) ... [2019-02-28 10:15:35,524 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "SkatingStrawberry.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.02 10:15:35" (1/1) ... [2019-02-28 10:15:35,524 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "SkatingStrawberry.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.02 10:15:35" (1/1) ... [2019-02-28 10:15:35,528 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "SkatingStrawberry.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.02 10:15:35" (1/1) ... [2019-02-28 10:15:35,532 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "SkatingStrawberry.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.02 10:15:35" (1/1) ... [2019-02-28 10:15:35,532 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "SkatingStrawberry.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.02 10:15:35" (1/1) ... [2019-02-28 10:15:35,534 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-02-28 10:15:35,534 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-02-28 10:15:35,534 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-02-28 10:15:35,534 INFO L276 PluginConnector]: RCFGBuilder initialized [2019-02-28 10:15:35,535 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "SkatingStrawberry.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.02 10:15:35" (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:16092 -smt2 -in -t:200000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:16092 -smt2 -in -t:200000 [2019-02-28 10:15:35,587 INFO L124 BoogieDeclarations]: Specification and implementation of procedure main given in one single declaration [2019-02-28 10:15:35,587 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-02-28 10:15:35,587 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-02-28 10:15:35,795 INFO L278 CfgBuilder]: Using library mode [2019-02-28 10:15:35,796 INFO L286 CfgBuilder]: Removed 1 assue(true) statements. [2019-02-28 10:15:35,797 INFO L202 PluginConnector]: Adding new model SkatingStrawberry.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.02 10:15:35 BoogieIcfgContainer [2019-02-28 10:15:35,797 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-02-28 10:15:35,798 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-02-28 10:15:35,798 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-02-28 10:15:35,801 INFO L276 PluginConnector]: TraceAbstraction initialized [2019-02-28 10:15:35,801 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "SkatingStrawberry.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.02 10:15:35" (1/2) ... [2019-02-28 10:15:35,802 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d1a695f and model type SkatingStrawberry.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.02 10:15:35, skipping insertion in model container [2019-02-28 10:15:35,802 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "SkatingStrawberry.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.02 10:15:35" (2/2) ... [2019-02-28 10:15:35,804 INFO L112 eAbstractionObserver]: Analyzing ICFG SkatingStrawberry.bpl [2019-02-28 10:15:35,813 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-02-28 10:15:35,821 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-02-28 10:15:35,837 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-02-28 10:15:35,868 INFO L382 AbstractCegarLoop]: Interprodecural is true [2019-02-28 10:15:35,868 INFO L383 AbstractCegarLoop]: Hoare is true [2019-02-28 10:15:35,868 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-02-28 10:15:35,868 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-02-28 10:15:35,868 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-02-28 10:15:35,869 INFO L387 AbstractCegarLoop]: Difference is false [2019-02-28 10:15:35,869 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-02-28 10:15:35,869 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-02-28 10:15:35,885 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states. [2019-02-28 10:15:35,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-02-28 10:15:35,897 INFO L394 BasicCegarLoop]: Found error trace [2019-02-28 10:15:35,898 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-02-28 10:15:35,901 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-02-28 10:15:35,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-28 10:15:35,912 INFO L82 PathProgramCache]: Analyzing trace with hash 30048, now seen corresponding path program 1 times [2019-02-28 10:15:35,914 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-28 10:15:35,966 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-28 10:15:35,967 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-28 10:15:35,967 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-28 10:15:35,967 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-28 10:15:36,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-28 10:15:36,261 WARN L181 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 10 [2019-02-28 10:15:36,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-28 10:15:36,297 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-02-28 10:15:36,298 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-02-28 10:15:36,298 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-02-28 10:15:36,302 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-02-28 10:15:36,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-02-28 10:15:36,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-02-28 10:15:36,318 INFO L87 Difference]: Start difference. First operand 6 states. Second operand 4 states. [2019-02-28 10:15:36,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-28 10:15:36,390 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2019-02-28 10:15:36,390 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-02-28 10:15:36,392 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 3 [2019-02-28 10:15:36,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-28 10:15:36,403 INFO L225 Difference]: With dead ends: 15 [2019-02-28 10:15:36,403 INFO L226 Difference]: Without dead ends: 5 [2019-02-28 10:15:36,406 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-02-28 10:15:36,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5 states. [2019-02-28 10:15:36,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5 to 5. [2019-02-28 10:15:36,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2019-02-28 10:15:36,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 5 transitions. [2019-02-28 10:15:36,437 INFO L78 Accepts]: Start accepts. Automaton has 5 states and 5 transitions. Word has length 3 [2019-02-28 10:15:36,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-28 10:15:36,437 INFO L480 AbstractCegarLoop]: Abstraction has 5 states and 5 transitions. [2019-02-28 10:15:36,437 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-02-28 10:15:36,438 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states and 5 transitions. [2019-02-28 10:15:36,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-02-28 10:15:36,438 INFO L394 BasicCegarLoop]: Found error trace [2019-02-28 10:15:36,438 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-02-28 10:15:36,438 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-02-28 10:15:36,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-28 10:15:36,439 INFO L82 PathProgramCache]: Analyzing trace with hash 927622, now seen corresponding path program 1 times [2019-02-28 10:15:36,439 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-28 10:15:36,440 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-28 10:15:36,440 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-28 10:15:36,440 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-28 10:15:36,441 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-28 10:15:36,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-28 10:15:36,664 WARN L181 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 18 [2019-02-28 10:15:36,684 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-28 10:15:36,684 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-28 10:15:36,685 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-28 10:15:36,686 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-02-28 10:15:36,687 INFO L207 CegarAbsIntRunner]: [0], [4], [8], [9] [2019-02-28 10:15:36,728 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-02-28 10:15:36,728 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-28 10:15:36,844 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-28 10:15:36,848 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 22 root evaluator evaluations with a maximum evaluation depth of 3. Performed 22 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2019-02-28 10:15:36,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-28 10:15:36,858 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-28 10:15:36,858 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-28 10:15:36,858 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 [2019-02-28 10:15:36,877 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-28 10:15:36,877 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-28 10:15:36,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-28 10:15:36,915 WARN L254 TraceCheckSpWp]: Trace formula consists of 17 conjuncts, 12 conjunts are in the unsatisfiable core [2019-02-28 10:15:36,920 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-02-28 10:15:36,989 INFO L442 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12 [2019-02-28 10:15:37,029 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:15:37,033 INFO L442 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2019-02-28 10:15:37,035 INFO L315 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-02-28 10:15:37,099 INFO L315 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-28 10:15:37,187 INFO L315 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-28 10:15:37,188 INFO L209 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:15, output treesize:16 [2019-02-28 10:15:37,291 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:15:37,382 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:15:37,477 INFO L442 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 34 treesize of output 45 [2019-02-28 10:15:37,494 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:15:37,503 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:15:37,504 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:15:37,517 INFO L442 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 36 [2019-02-28 10:15:37,519 INFO L315 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-02-28 10:15:37,623 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:15:37,626 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:15:37,627 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:15:37,634 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:15:37,637 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:15:37,643 INFO L442 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 34 [2019-02-28 10:15:37,644 INFO L315 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2019-02-28 10:15:37,779 INFO L315 ElimStorePlain]: Start of recursive call 3: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2019-02-28 10:15:37,963 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:15:37,965 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:15:38,007 INFO L442 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 44 [2019-02-28 10:15:38,015 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:15:38,016 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:15:38,020 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:15:38,022 INFO L442 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 32 [2019-02-28 10:15:38,023 INFO L315 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-02-28 10:15:38,093 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:15:38,094 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:15:38,097 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:15:38,102 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:15:38,104 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:15:38,120 INFO L442 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 31 [2019-02-28 10:15:38,121 INFO L315 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-02-28 10:15:38,151 INFO L315 ElimStorePlain]: Start of recursive call 6: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2019-02-28 10:15:38,456 INFO L315 ElimStorePlain]: Start of recursive call 2: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2019-02-28 10:15:38,569 INFO L315 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 2 xjuncts. [2019-02-28 10:15:38,570 INFO L209 ElimStorePlain]: Needed 8 recursive calls to eliminate 3 variables, input treesize:42, output treesize:72 [2019-02-28 10:15:38,649 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-28 10:15:38,649 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-02-28 10:15:38,671 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-28 10:15:38,692 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-28 10:15:38,693 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2019-02-28 10:15:38,693 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-28 10:15:38,694 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-02-28 10:15:38,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-02-28 10:15:38,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-02-28 10:15:38,694 INFO L87 Difference]: Start difference. First operand 5 states and 5 transitions. Second operand 6 states. [2019-02-28 10:20:57,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-28 10:20:57,683 INFO L93 Difference]: Finished difference Result 8 states and 8 transitions. [2019-02-28 10:20:57,683 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-02-28 10:20:57,683 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 4 [2019-02-28 10:20:57,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-28 10:20:57,684 INFO L225 Difference]: With dead ends: 8 [2019-02-28 10:20:57,684 INFO L226 Difference]: Without dead ends: 6 [2019-02-28 10:20:57,686 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-02-28 10:20:57,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2019-02-28 10:20:57,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2019-02-28 10:20:57,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2019-02-28 10:20:57,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2019-02-28 10:20:57,689 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2019-02-28 10:20:57,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-28 10:20:57,689 INFO L480 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2019-02-28 10:20:57,689 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-02-28 10:20:57,689 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2019-02-28 10:20:57,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-02-28 10:20:57,690 INFO L394 BasicCegarLoop]: Found error trace [2019-02-28 10:20:57,690 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1, 1] [2019-02-28 10:20:57,691 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-02-28 10:20:57,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-28 10:20:57,692 INFO L82 PathProgramCache]: Analyzing trace with hash 28752416, now seen corresponding path program 2 times [2019-02-28 10:20:57,692 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-28 10:20:57,693 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-28 10:20:57,693 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-28 10:20:57,693 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-28 10:20:57,693 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-28 10:20:57,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-28 10:20:57,880 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-28 10:20:57,881 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-28 10:20:57,881 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-28 10:20:57,881 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-02-28 10:20:57,881 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-02-28 10:20:57,882 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-28 10:20:57,882 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 [2019-02-28 10:20:57,893 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-02-28 10:20:57,894 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-02-28 10:20:57,928 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-02-28 10:20:57,928 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-02-28 10:20:57,929 WARN L254 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 19 conjunts are in the unsatisfiable core [2019-02-28 10:20:57,930 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-02-28 10:20:57,934 INFO L442 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12 [2019-02-28 10:20:57,945 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:20:57,946 INFO L442 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2019-02-28 10:20:57,947 INFO L315 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-02-28 10:20:57,955 INFO L315 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-28 10:20:57,975 INFO L315 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-28 10:20:57,976 INFO L209 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:15, output treesize:16 [2019-02-28 10:20:58,034 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:20:58,035 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:20:58,048 INFO L442 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 40 [2019-02-28 10:20:58,055 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:20:58,057 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:20:58,059 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:20:58,060 INFO L442 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2019-02-28 10:20:58,062 INFO L315 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-02-28 10:20:58,118 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:20:58,120 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:20:58,122 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:20:58,128 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:20:58,129 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:20:58,132 INFO L442 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2019-02-28 10:20:58,133 INFO L315 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2019-02-28 10:20:58,166 INFO L315 ElimStorePlain]: Start of recursive call 3: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2019-02-28 10:20:58,262 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:20:58,268 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:20:58,302 INFO L442 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 30 treesize of output 41 [2019-02-28 10:20:58,314 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:20:58,316 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:20:58,327 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:20:58,336 INFO L442 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2019-02-28 10:20:58,337 INFO L315 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-02-28 10:20:58,384 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:20:58,385 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:20:58,390 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:20:58,407 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:20:58,410 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:20:58,416 INFO L442 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 30 [2019-02-28 10:20:58,417 INFO L315 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-02-28 10:20:58,450 INFO L315 ElimStorePlain]: Start of recursive call 6: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2019-02-28 10:20:58,587 INFO L315 ElimStorePlain]: Start of recursive call 2: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2019-02-28 10:20:58,631 INFO L315 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 2 xjuncts. [2019-02-28 10:20:58,631 INFO L209 ElimStorePlain]: Needed 8 recursive calls to eliminate 3 variables, input treesize:45, output treesize:78 [2019-02-28 10:20:58,788 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:20:58,792 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:20:58,796 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:20:58,804 INFO L442 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 54 treesize of output 56 [2019-02-28 10:20:58,815 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:20:58,817 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:20:58,820 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:20:58,835 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:20:58,841 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:20:58,843 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:20:58,849 INFO L442 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 42 [2019-02-28 10:20:58,850 INFO L315 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-02-28 10:20:58,870 INFO L315 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-28 10:20:58,958 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:20:58,960 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:20:58,960 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:20:58,962 INFO L442 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 43 [2019-02-28 10:20:58,966 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:20:58,968 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:20:58,977 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:20:58,979 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:20:58,981 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:20:58,983 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:20:58,984 INFO L442 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 39 [2019-02-28 10:20:58,984 INFO L315 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2019-02-28 10:20:58,996 INFO L315 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-28 10:20:59,034 INFO L315 ElimStorePlain]: Start of recursive call 2: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2019-02-28 10:20:59,212 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:20:59,214 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:20:59,215 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:20:59,219 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:20:59,221 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:20:59,230 INFO L442 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 64 treesize of output 66 [2019-02-28 10:20:59,244 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:20:59,250 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:20:59,251 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:20:59,254 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:20:59,263 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:20:59,265 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:20:59,267 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:20:59,284 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:20:59,285 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:20:59,297 INFO L442 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 51 treesize of output 53 [2019-02-28 10:20:59,298 INFO L315 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-02-28 10:20:59,350 INFO L315 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-28 10:20:59,432 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:20:59,434 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:20:59,435 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:20:59,440 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:20:59,442 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:20:59,447 INFO L442 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 58 [2019-02-28 10:20:59,458 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:20:59,459 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:20:59,461 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:20:59,463 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:20:59,464 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:20:59,466 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:20:59,468 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:20:59,472 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:20:59,475 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:20:59,479 INFO L442 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 54 [2019-02-28 10:20:59,480 INFO L315 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-02-28 10:20:59,499 INFO L315 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-28 10:20:59,553 INFO L315 ElimStorePlain]: Start of recursive call 7: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2019-02-28 10:20:59,625 INFO L315 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2019-02-28 10:20:59,625 INFO L209 ElimStorePlain]: Needed 11 recursive calls to eliminate 5 variables, input treesize:125, output treesize:113 [2019-02-28 10:21:00,131 WARN L181 SmtUtils]: Spent 425.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2019-02-28 10:21:00,147 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-28 10:21:00,148 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-02-28 10:21:00,232 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-02-28 10:21:00,251 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-28 10:21:00,251 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 3] total 9 [2019-02-28 10:21:00,251 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-28 10:21:00,252 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-02-28 10:21:00,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-02-28 10:21:00,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2019-02-28 10:21:00,253 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand 8 states. [2019-02-28 10:27:49,551 WARN L181 SmtUtils]: Spent 844.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 69