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/heapseparator/speedup-poc-dd-7-limited.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.24-df3cc4e-m [2019-01-11 11:13:41,654 INFO L170 SettingsManager]: Resetting all preferences to default values... [2019-01-11 11:13:41,656 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2019-01-11 11:13:41,667 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-01-11 11:13:41,668 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-01-11 11:13:41,669 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-01-11 11:13:41,670 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-01-11 11:13:41,672 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2019-01-11 11:13:41,673 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-01-11 11:13:41,674 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-01-11 11:13:41,675 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-01-11 11:13:41,675 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-01-11 11:13:41,676 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-01-11 11:13:41,677 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-01-11 11:13:41,678 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-01-11 11:13:41,679 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-01-11 11:13:41,680 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-01-11 11:13:41,682 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-01-11 11:13:41,684 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2019-01-11 11:13:41,685 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-01-11 11:13:41,686 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-01-11 11:13:41,687 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-01-11 11:13:41,689 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-01-11 11:13:41,690 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-01-11 11:13:41,690 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-01-11 11:13:41,691 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-01-11 11:13:41,692 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-01-11 11:13:41,692 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-01-11 11:13:41,693 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2019-01-11 11:13:41,694 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-01-11 11:13:41,694 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2019-01-11 11:13:41,695 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-01-11 11:13:41,695 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-01-11 11:13:41,695 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2019-01-11 11:13:41,697 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2019-01-11 11:13:41,697 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2019-01-11 11:13:41,698 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 [2019-01-11 11:13:41,710 INFO L110 SettingsManager]: Loading preferences was successful [2019-01-11 11:13:41,710 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2019-01-11 11:13:41,711 INFO L131 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2019-01-11 11:13:41,711 INFO L133 SettingsManager]: * Show backtranslation warnings=false [2019-01-11 11:13:41,711 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-01-11 11:13:41,711 INFO L133 SettingsManager]: * User list type=DISABLED [2019-01-11 11:13:41,711 INFO L133 SettingsManager]: * Inline calls to unimplemented procedures=true [2019-01-11 11:13:41,712 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-01-11 11:13:41,712 INFO L133 SettingsManager]: * Explicit value domain=true [2019-01-11 11:13:41,712 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-01-11 11:13:41,712 INFO L133 SettingsManager]: * Octagon Domain=false [2019-01-11 11:13:41,712 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2019-01-11 11:13:41,713 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-01-11 11:13:41,713 INFO L133 SettingsManager]: * Interval Domain=false [2019-01-11 11:13:41,714 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-01-11 11:13:41,714 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2019-01-11 11:13:41,714 INFO L133 SettingsManager]: * Use SBE=true [2019-01-11 11:13:41,714 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-01-11 11:13:41,714 INFO L133 SettingsManager]: * sizeof long=4 [2019-01-11 11:13:41,715 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2019-01-11 11:13:41,715 INFO L133 SettingsManager]: * sizeof POINTER=4 [2019-01-11 11:13:41,715 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2019-01-11 11:13:41,715 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-01-11 11:13:41,715 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-01-11 11:13:41,715 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-01-11 11:13:41,716 INFO L133 SettingsManager]: * sizeof long double=12 [2019-01-11 11:13:41,716 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2019-01-11 11:13:41,716 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-01-11 11:13:41,716 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-01-11 11:13:41,717 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-01-11 11:13:41,717 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2019-01-11 11:13:41,717 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:8192 -smt2 -in -t:2000 [2019-01-11 11:13:41,717 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-01-11 11:13:41,717 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-01-11 11:13:41,717 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-01-11 11:13:41,718 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-01-11 11:13:41,718 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-01-11 11:13:41,718 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:8192 -smt2 -in [2019-01-11 11:13:41,718 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-01-11 11:13:41,718 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-01-11 11:13:41,747 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-01-11 11:13:41,759 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-01-11 11:13:41,762 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-01-11 11:13:41,763 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2019-01-11 11:13:41,763 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2019-01-11 11:13:41,764 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/heapseparator/speedup-poc-dd-7-limited.bpl [2019-01-11 11:13:41,764 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/heapseparator/speedup-poc-dd-7-limited.bpl' [2019-01-11 11:13:41,800 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-01-11 11:13:41,801 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-01-11 11:13:41,802 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-01-11 11:13:41,802 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-01-11 11:13:41,802 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2019-01-11 11:13:41,818 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "speedup-poc-dd-7-limited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.01 11:13:41" (1/1) ... [2019-01-11 11:13:41,830 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "speedup-poc-dd-7-limited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.01 11:13:41" (1/1) ... [2019-01-11 11:13:41,857 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-01-11 11:13:41,858 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-01-11 11:13:41,858 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-01-11 11:13:41,858 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2019-01-11 11:13:41,870 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "speedup-poc-dd-7-limited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.01 11:13:41" (1/1) ... [2019-01-11 11:13:41,870 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "speedup-poc-dd-7-limited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.01 11:13:41" (1/1) ... [2019-01-11 11:13:41,872 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "speedup-poc-dd-7-limited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.01 11:13:41" (1/1) ... [2019-01-11 11:13:41,872 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "speedup-poc-dd-7-limited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.01 11:13:41" (1/1) ... [2019-01-11 11:13:41,876 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "speedup-poc-dd-7-limited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.01 11:13:41" (1/1) ... [2019-01-11 11:13:41,880 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "speedup-poc-dd-7-limited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.01 11:13:41" (1/1) ... [2019-01-11 11:13:41,881 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "speedup-poc-dd-7-limited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.01 11:13:41" (1/1) ... [2019-01-11 11:13:41,883 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-01-11 11:13:41,883 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-01-11 11:13:41,883 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-01-11 11:13:41,884 INFO L276 PluginConnector]: RCFGBuilder initialized [2019-01-11 11:13:41,885 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "speedup-poc-dd-7-limited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.01 11:13:41" (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:8192 -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:8192 -smt2 -in -t:2000 [2019-01-11 11:13:41,963 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-01-11 11:13:41,964 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-01-11 11:13:42,470 INFO L281 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-01-11 11:13:42,471 INFO L286 CfgBuilder]: Removed 17 assue(true) statements. [2019-01-11 11:13:42,472 INFO L202 PluginConnector]: Adding new model speedup-poc-dd-7-limited.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.01 11:13:42 BoogieIcfgContainer [2019-01-11 11:13:42,472 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-01-11 11:13:42,473 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-01-11 11:13:42,473 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-01-11 11:13:42,476 INFO L276 PluginConnector]: TraceAbstraction initialized [2019-01-11 11:13:42,477 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "speedup-poc-dd-7-limited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.01 11:13:41" (1/2) ... [2019-01-11 11:13:42,478 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3150d3d2 and model type speedup-poc-dd-7-limited.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.01 11:13:42, skipping insertion in model container [2019-01-11 11:13:42,478 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "speedup-poc-dd-7-limited.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.01 11:13:42" (2/2) ... [2019-01-11 11:13:42,480 INFO L112 eAbstractionObserver]: Analyzing ICFG speedup-poc-dd-7-limited.bpl [2019-01-11 11:13:42,487 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-01-11 11:13:42,495 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 7 error locations. [2019-01-11 11:13:42,510 INFO L257 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2019-01-11 11:13:42,537 INFO L382 AbstractCegarLoop]: Interprodecural is true [2019-01-11 11:13:42,537 INFO L383 AbstractCegarLoop]: Hoare is true [2019-01-11 11:13:42,537 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-01-11 11:13:42,537 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-01-11 11:13:42,538 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-01-11 11:13:42,538 INFO L387 AbstractCegarLoop]: Difference is false [2019-01-11 11:13:42,538 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-01-11 11:13:42,538 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-01-11 11:13:42,553 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2019-01-11 11:13:42,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2019-01-11 11:13:42,559 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 11:13:42,560 INFO L402 BasicCegarLoop]: trace histogram [1, 1] [2019-01-11 11:13:42,563 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-11 11:13:42,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 11:13:42,568 INFO L82 PathProgramCache]: Analyzing trace with hash 992, now seen corresponding path program 1 times [2019-01-11 11:13:42,570 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 11:13:42,613 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 11:13:42,614 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 11:13:42,614 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 11:13:42,614 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 11:13:42,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 11:13:42,771 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 11:13:42,773 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-01-11 11:13:42,774 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2019-01-11 11:13:42,774 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-01-11 11:13:42,779 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-01-11 11:13:42,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-01-11 11:13:42,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-01-11 11:13:42,797 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 3 states. [2019-01-11 11:13:43,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 11:13:43,000 INFO L93 Difference]: Finished difference Result 33 states and 45 transitions. [2019-01-11 11:13:43,001 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-01-11 11:13:43,002 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 2 [2019-01-11 11:13:43,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 11:13:43,019 INFO L225 Difference]: With dead ends: 33 [2019-01-11 11:13:43,019 INFO L226 Difference]: Without dead ends: 28 [2019-01-11 11:13:43,022 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-01-11 11:13:43,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-01-11 11:13:43,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 16. [2019-01-11 11:13:43,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-01-11 11:13:43,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 29 transitions. [2019-01-11 11:13:43,055 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 29 transitions. Word has length 2 [2019-01-11 11:13:43,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 11:13:43,057 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 29 transitions. [2019-01-11 11:13:43,057 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-01-11 11:13:43,057 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 29 transitions. [2019-01-11 11:13:43,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-01-11 11:13:43,058 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 11:13:43,058 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-01-11 11:13:43,059 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-11 11:13:43,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 11:13:43,059 INFO L82 PathProgramCache]: Analyzing trace with hash 30816, now seen corresponding path program 1 times [2019-01-11 11:13:43,060 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 11:13:43,061 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 11:13:43,061 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 11:13:43,061 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 11:13:43,061 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 11:13:43,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 11:13:43,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 11:13:43,140 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-01-11 11:13:43,140 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2019-01-11 11:13:43,140 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-01-11 11:13:43,143 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-01-11 11:13:43,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-01-11 11:13:43,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-01-11 11:13:43,144 INFO L87 Difference]: Start difference. First operand 16 states and 29 transitions. Second operand 3 states. [2019-01-11 11:13:43,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 11:13:43,487 INFO L93 Difference]: Finished difference Result 28 states and 40 transitions. [2019-01-11 11:13:43,488 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-01-11 11:13:43,488 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2019-01-11 11:13:43,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 11:13:43,489 INFO L225 Difference]: With dead ends: 28 [2019-01-11 11:13:43,489 INFO L226 Difference]: Without dead ends: 27 [2019-01-11 11:13:43,490 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-01-11 11:13:43,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-01-11 11:13:43,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 17. [2019-01-11 11:13:43,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-01-11 11:13:43,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 30 transitions. [2019-01-11 11:13:43,497 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 30 transitions. Word has length 3 [2019-01-11 11:13:43,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 11:13:43,498 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 30 transitions. [2019-01-11 11:13:43,498 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-01-11 11:13:43,498 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 30 transitions. [2019-01-11 11:13:43,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-01-11 11:13:43,499 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 11:13:43,499 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-01-11 11:13:43,499 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-11 11:13:43,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 11:13:43,500 INFO L82 PathProgramCache]: Analyzing trace with hash 30380, now seen corresponding path program 1 times [2019-01-11 11:13:43,500 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 11:13:43,501 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 11:13:43,501 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 11:13:43,501 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 11:13:43,501 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 11:13:43,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 11:13:43,658 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 11:13:43,658 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 11:13:43,658 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 11:13:43,659 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2019-01-11 11:13:43,661 INFO L207 CegarAbsIntRunner]: [0], [18], [31] [2019-01-11 11:13:43,699 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-11 11:13:43,699 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-11 11:13:43,775 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-11 11:13:43,777 INFO L272 AbstractInterpreter]: Visited 3 different actions 3 times. Never merged. Never widened. Performed 86 root evaluator evaluations with a maximum evaluation depth of 3. Performed 86 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2019-01-11 11:13:43,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 11:13:43,784 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-11 11:13:43,784 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 11:13:43,784 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 [2019-01-11 11:13:43,804 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 11:13:43,804 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-11 11:13:43,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 11:13:43,839 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 11:13:44,157 WARN L181 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2019-01-11 11:13:44,196 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:13:44,198 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:13:44,207 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 38 [2019-01-11 11:13:44,228 INFO L478 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 29 [2019-01-11 11:13:44,256 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:13:44,282 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:13:44,284 INFO L478 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 25 treesize of output 39 [2019-01-11 11:13:44,326 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:13:44,353 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:13:44,375 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:13:44,377 INFO L478 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 53 [2019-01-11 11:13:44,457 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:13:44,459 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:13:44,460 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:13:44,464 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:13:44,468 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:13:44,471 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2019-01-11 11:13:44,473 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2019-01-11 11:13:44,477 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:13:44,480 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:13:44,483 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:13:44,488 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:13:44,563 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 27 [2019-01-11 11:13:44,588 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:13:44,589 INFO L478 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2019-01-11 11:13:44,604 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:13:44,607 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:13:44,609 INFO L478 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 29 treesize of output 43 [2019-01-11 11:13:44,703 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:13:44,705 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:13:44,707 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:13:44,709 INFO L478 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2019-01-11 11:13:44,736 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:13:44,737 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:13:44,738 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:13:44,739 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:13:44,742 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 75 [2019-01-11 11:13:44,758 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:13:44,760 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:13:44,762 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:13:44,764 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:13:44,766 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:13:44,769 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 97 [2019-01-11 11:13:44,791 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:13:44,797 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:13:44,800 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:13:44,802 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:13:44,804 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:13:44,805 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:13:44,807 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 120 [2019-01-11 11:13:44,809 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-11 11:13:45,242 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:13:45,295 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:13:45,326 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:13:45,347 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:13:45,369 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:13:45,385 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:13:45,420 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-11 11:13:45,421 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 7 variables, input treesize:71, output treesize:54 [2019-01-11 11:13:45,473 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:13:45,474 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:13:45,475 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:13:45,476 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:13:45,478 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:13:45,479 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:13:45,480 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:13:45,481 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:13:45,483 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:13:45,484 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:13:45,485 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:13:45,487 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:13:45,488 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:13:45,489 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:13:45,491 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:13:45,492 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:13:45,493 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:13:45,495 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:13:45,496 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:13:45,497 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:13:45,499 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:13:45,500 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:13:45,503 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 120 [2019-01-11 11:13:45,505 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 11:13:45,771 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-11 11:13:45,771 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:64, output treesize:54 [2019-01-11 11:13:46,974 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 11:13:46,974 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 11:13:46,991 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 11:13:47,011 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-11 11:13:47,012 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-01-11 11:13:47,012 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-11 11:13:47,012 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-01-11 11:13:47,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-01-11 11:13:47,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-01-11 11:13:47,013 INFO L87 Difference]: Start difference. First operand 17 states and 30 transitions. Second operand 6 states. [2019-01-11 11:14:07,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 11:14:07,041 INFO L93 Difference]: Finished difference Result 54 states and 79 transitions. [2019-01-11 11:14:07,042 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-01-11 11:14:07,042 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 3 [2019-01-11 11:14:07,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 11:14:07,044 INFO L225 Difference]: With dead ends: 54 [2019-01-11 11:14:07,044 INFO L226 Difference]: Without dead ends: 52 [2019-01-11 11:14:07,044 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2019-01-11 11:14:07,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-01-11 11:14:07,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 20. [2019-01-11 11:14:07,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-01-11 11:14:07,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 41 transitions. [2019-01-11 11:14:07,051 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 41 transitions. Word has length 3 [2019-01-11 11:14:07,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 11:14:07,052 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 41 transitions. [2019-01-11 11:14:07,052 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-01-11 11:14:07,052 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 41 transitions. [2019-01-11 11:14:07,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-01-11 11:14:07,052 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 11:14:07,052 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-01-11 11:14:07,053 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-11 11:14:07,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 11:14:07,053 INFO L82 PathProgramCache]: Analyzing trace with hash 30008, now seen corresponding path program 1 times [2019-01-11 11:14:07,053 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 11:14:07,054 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 11:14:07,054 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 11:14:07,055 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 11:14:07,055 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 11:14:07,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 11:14:07,101 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 11:14:07,102 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 11:14:07,102 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 11:14:07,102 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2019-01-11 11:14:07,102 INFO L207 CegarAbsIntRunner]: [0], [6], [31] [2019-01-11 11:14:07,103 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-11 11:14:07,104 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-11 11:14:07,116 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-11 11:14:07,116 INFO L272 AbstractInterpreter]: Visited 3 different actions 3 times. Never merged. Never widened. Performed 86 root evaluator evaluations with a maximum evaluation depth of 3. Performed 86 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2019-01-11 11:14:07,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 11:14:07,117 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-11 11:14:07,117 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 11:14:07,117 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 [2019-01-11 11:14:07,126 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 11:14:07,126 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-11 11:14:07,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 11:14:07,135 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 11:14:07,216 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 27 [2019-01-11 11:14:07,237 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:07,238 INFO L478 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2019-01-11 11:14:07,277 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:07,287 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:07,289 INFO L478 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 29 treesize of output 43 [2019-01-11 11:14:07,324 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:07,345 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:07,370 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:07,371 INFO L478 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2019-01-11 11:14:07,391 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:07,393 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:07,395 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:07,397 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:07,398 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 75 [2019-01-11 11:14:07,442 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:07,463 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:07,485 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:07,489 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:07,491 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:07,493 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 97 [2019-01-11 11:14:07,500 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:07,502 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:07,504 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:07,506 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:07,508 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:07,510 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:07,513 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 120 [2019-01-11 11:14:07,515 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-11 11:14:07,587 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:14:07,628 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:14:07,658 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:14:07,679 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:14:07,698 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:14:07,750 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:14:07,790 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:07,791 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:07,792 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 38 [2019-01-11 11:14:07,803 INFO L478 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 29 [2019-01-11 11:14:07,820 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:07,825 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:07,826 INFO L478 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 25 treesize of output 39 [2019-01-11 11:14:07,863 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:07,864 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:07,866 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:07,867 INFO L478 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 53 [2019-01-11 11:14:07,897 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:07,898 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:07,900 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:07,901 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:07,902 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:07,904 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2019-01-11 11:14:07,905 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-11 11:14:07,910 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:14:07,911 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:14:07,914 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:14:07,917 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:14:07,949 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 2 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-11 11:14:07,949 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 8 variables, input treesize:71, output treesize:54 [2019-01-11 11:14:07,983 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:07,986 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:07,988 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:07,990 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:07,991 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:07,991 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:07,992 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:07,993 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:07,994 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:07,995 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:07,997 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:07,998 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:07,999 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:08,001 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:08,003 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:08,004 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:08,004 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:08,005 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:08,006 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:08,008 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:08,009 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:08,010 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:08,013 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 126 [2019-01-11 11:14:08,015 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 11:14:08,134 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-11 11:14:08,134 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:64, output treesize:54 [2019-01-11 11:14:08,217 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 11:14:08,217 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 11:14:08,227 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 11:14:08,246 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-01-11 11:14:08,246 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [2, 2] total 6 [2019-01-11 11:14:08,247 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-01-11 11:14:08,247 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-01-11 11:14:08,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-01-11 11:14:08,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-01-11 11:14:08,247 INFO L87 Difference]: Start difference. First operand 20 states and 41 transitions. Second operand 4 states. [2019-01-11 11:14:08,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 11:14:08,356 INFO L93 Difference]: Finished difference Result 25 states and 67 transitions. [2019-01-11 11:14:08,357 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-01-11 11:14:08,357 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 3 [2019-01-11 11:14:08,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 11:14:08,358 INFO L225 Difference]: With dead ends: 25 [2019-01-11 11:14:08,358 INFO L226 Difference]: Without dead ends: 24 [2019-01-11 11:14:08,359 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-01-11 11:14:08,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-01-11 11:14:08,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2019-01-11 11:14:08,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-01-11 11:14:08,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 66 transitions. [2019-01-11 11:14:08,364 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 66 transitions. Word has length 3 [2019-01-11 11:14:08,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 11:14:08,365 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 66 transitions. [2019-01-11 11:14:08,365 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-01-11 11:14:08,365 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 66 transitions. [2019-01-11 11:14:08,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-01-11 11:14:08,365 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 11:14:08,366 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-01-11 11:14:08,366 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-11 11:14:08,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 11:14:08,366 INFO L82 PathProgramCache]: Analyzing trace with hash 30132, now seen corresponding path program 1 times [2019-01-11 11:14:08,366 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 11:14:08,367 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 11:14:08,367 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 11:14:08,367 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 11:14:08,367 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 11:14:08,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 11:14:08,478 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 11:14:08,478 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 11:14:08,479 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 11:14:08,479 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2019-01-11 11:14:08,479 INFO L207 CegarAbsIntRunner]: [0], [10], [31] [2019-01-11 11:14:08,482 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-11 11:14:08,482 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-11 11:14:08,491 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-11 11:14:08,491 INFO L272 AbstractInterpreter]: Visited 3 different actions 3 times. Never merged. Never widened. Performed 86 root evaluator evaluations with a maximum evaluation depth of 3. Performed 86 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2019-01-11 11:14:08,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 11:14:08,492 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-11 11:14:08,492 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 11:14:08,492 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 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-11 11:14:08,501 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 11:14:08,502 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-11 11:14:08,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 11:14:08,511 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 11:14:08,634 WARN L181 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2019-01-11 11:14:08,637 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 27 [2019-01-11 11:14:08,643 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:08,644 INFO L478 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2019-01-11 11:14:08,683 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:08,684 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:08,685 INFO L478 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 29 treesize of output 43 [2019-01-11 11:14:08,727 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:08,749 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:08,773 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:08,774 INFO L478 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2019-01-11 11:14:08,800 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:08,804 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:08,806 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:08,808 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:08,809 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 75 [2019-01-11 11:14:08,817 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:08,818 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:08,819 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:08,820 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:08,822 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:08,825 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 97 [2019-01-11 11:14:08,846 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:08,848 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:08,850 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:08,852 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:08,853 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:08,855 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:08,858 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 120 [2019-01-11 11:14:08,859 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-11 11:14:09,025 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:14:09,078 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:14:09,107 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:14:09,155 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:14:09,172 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:14:09,209 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:14:09,259 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:09,261 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:09,262 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 46 [2019-01-11 11:14:09,292 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:09,293 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:09,294 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:09,295 INFO L478 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 0 case distinctions, treesize of input 33 treesize of output 48 [2019-01-11 11:14:09,303 INFO L478 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 0 case distinctions, treesize of input 36 treesize of output 45 [2019-01-11 11:14:09,338 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:09,339 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:09,340 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:09,341 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 59 [2019-01-11 11:14:09,401 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:09,402 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:09,403 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:09,405 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:09,406 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:09,407 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2019-01-11 11:14:09,408 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-11 11:14:09,410 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:14:09,412 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:14:09,414 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:14:09,417 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:14:09,470 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-11 11:14:09,470 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 7 variables, input treesize:82, output treesize:54 [2019-01-11 11:14:09,507 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:09,508 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:09,509 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:09,510 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:09,511 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:09,512 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:09,513 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:09,514 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:09,516 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:09,517 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:09,518 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:09,520 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:09,521 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:09,523 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:09,524 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:09,525 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:09,527 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:09,528 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:09,529 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:09,531 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:09,532 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:09,534 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:09,536 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 126 [2019-01-11 11:14:09,537 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 11:14:09,625 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-11 11:14:09,626 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:64, output treesize:54 [2019-01-11 11:14:10,938 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 11:14:10,938 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 11:14:10,968 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 11:14:10,987 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-11 11:14:10,987 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-01-11 11:14:10,988 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-11 11:14:10,988 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-01-11 11:14:10,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-01-11 11:14:10,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-01-11 11:14:10,988 INFO L87 Difference]: Start difference. First operand 23 states and 66 transitions. Second operand 6 states. [2019-01-11 11:14:29,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 11:14:29,704 INFO L93 Difference]: Finished difference Result 57 states and 111 transitions. [2019-01-11 11:14:29,704 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-01-11 11:14:29,704 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 3 [2019-01-11 11:14:29,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 11:14:29,705 INFO L225 Difference]: With dead ends: 57 [2019-01-11 11:14:29,706 INFO L226 Difference]: Without dead ends: 56 [2019-01-11 11:14:29,706 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2019-01-11 11:14:29,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-01-11 11:14:29,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 25. [2019-01-11 11:14:29,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-01-11 11:14:29,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 82 transitions. [2019-01-11 11:14:29,713 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 82 transitions. Word has length 3 [2019-01-11 11:14:29,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 11:14:29,713 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 82 transitions. [2019-01-11 11:14:29,713 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-01-11 11:14:29,713 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 82 transitions. [2019-01-11 11:14:29,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-01-11 11:14:29,714 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 11:14:29,714 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-01-11 11:14:29,714 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-11 11:14:29,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 11:14:29,715 INFO L82 PathProgramCache]: Analyzing trace with hash 30628, now seen corresponding path program 1 times [2019-01-11 11:14:29,715 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 11:14:29,716 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 11:14:29,716 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 11:14:29,716 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 11:14:29,716 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 11:14:29,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 11:14:29,797 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 11:14:29,798 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 11:14:29,798 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 11:14:29,798 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2019-01-11 11:14:29,798 INFO L207 CegarAbsIntRunner]: [0], [26], [31] [2019-01-11 11:14:29,800 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-11 11:14:29,800 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-11 11:14:29,812 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-11 11:14:29,812 INFO L272 AbstractInterpreter]: Visited 3 different actions 3 times. Never merged. Never widened. Performed 86 root evaluator evaluations with a maximum evaluation depth of 3. Performed 86 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2019-01-11 11:14:29,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 11:14:29,812 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-11 11:14:29,812 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 11:14:29,813 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 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-11 11:14:29,826 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 11:14:29,826 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-11 11:14:29,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 11:14:29,845 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 11:14:29,912 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 27 [2019-01-11 11:14:29,917 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:29,918 INFO L478 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2019-01-11 11:14:29,927 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:29,929 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:29,930 INFO L478 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 29 treesize of output 43 [2019-01-11 11:14:29,934 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:29,935 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:29,937 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:29,938 INFO L478 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2019-01-11 11:14:29,949 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:29,952 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:29,954 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:29,955 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:29,957 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 75 [2019-01-11 11:14:29,963 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:29,965 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:29,966 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:29,968 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:29,969 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:29,971 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 97 [2019-01-11 11:14:29,982 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:29,985 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:29,986 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:29,988 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:29,990 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:29,992 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:29,994 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 120 [2019-01-11 11:14:29,995 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-11 11:14:30,063 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:14:30,099 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:14:30,126 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:14:30,149 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:14:30,167 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:14:30,184 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:14:30,233 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:30,235 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:30,236 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 46 [2019-01-11 11:14:30,264 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:30,265 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:30,267 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:30,268 INFO L478 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 0 case distinctions, treesize of input 33 treesize of output 48 [2019-01-11 11:14:30,273 INFO L478 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 0 case distinctions, treesize of input 36 treesize of output 45 [2019-01-11 11:14:30,276 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:30,277 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:30,278 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:30,279 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 59 [2019-01-11 11:14:30,328 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:30,329 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:30,330 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:30,332 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:30,333 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:30,334 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2019-01-11 11:14:30,335 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-11 11:14:30,338 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:14:30,339 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:14:30,340 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:14:30,342 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:14:30,371 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-11 11:14:30,371 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 7 variables, input treesize:82, output treesize:54 [2019-01-11 11:14:30,397 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:30,399 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:30,400 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:30,401 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:30,402 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:30,404 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:30,405 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:30,406 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:30,407 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:30,408 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:30,409 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:30,411 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:30,412 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:30,413 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:30,414 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:30,416 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:30,417 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:30,418 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:30,419 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:30,420 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:30,422 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:30,423 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:30,425 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 126 [2019-01-11 11:14:30,426 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 11:14:30,510 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-11 11:14:30,510 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:64, output treesize:54 [2019-01-11 11:14:31,718 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 11:14:31,719 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 11:14:31,729 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 11:14:31,747 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-11 11:14:31,747 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-01-11 11:14:31,747 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-11 11:14:31,748 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-01-11 11:14:31,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-01-11 11:14:31,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-01-11 11:14:31,748 INFO L87 Difference]: Start difference. First operand 25 states and 82 transitions. Second operand 6 states. [2019-01-11 11:14:50,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 11:14:50,229 INFO L93 Difference]: Finished difference Result 59 states and 127 transitions. [2019-01-11 11:14:50,230 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-01-11 11:14:50,230 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 3 [2019-01-11 11:14:50,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 11:14:50,231 INFO L225 Difference]: With dead ends: 59 [2019-01-11 11:14:50,231 INFO L226 Difference]: Without dead ends: 57 [2019-01-11 11:14:50,232 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2019-01-11 11:14:50,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2019-01-11 11:14:50,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 29. [2019-01-11 11:14:50,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-01-11 11:14:50,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 101 transitions. [2019-01-11 11:14:50,239 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 101 transitions. Word has length 3 [2019-01-11 11:14:50,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 11:14:50,239 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 101 transitions. [2019-01-11 11:14:50,239 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-01-11 11:14:50,239 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 101 transitions. [2019-01-11 11:14:50,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-11 11:14:50,240 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 11:14:50,240 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-11 11:14:50,240 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-11 11:14:50,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 11:14:50,241 INFO L82 PathProgramCache]: Analyzing trace with hash 955362, now seen corresponding path program 1 times [2019-01-11 11:14:50,241 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 11:14:50,241 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 11:14:50,242 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 11:14:50,242 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 11:14:50,242 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 11:14:50,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 11:14:50,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 11:14:50,302 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-01-11 11:14:50,303 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2019-01-11 11:14:50,303 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-01-11 11:14:50,303 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-01-11 11:14:50,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-01-11 11:14:50,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-01-11 11:14:50,304 INFO L87 Difference]: Start difference. First operand 29 states and 101 transitions. Second operand 3 states. [2019-01-11 11:14:50,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 11:14:50,371 INFO L93 Difference]: Finished difference Result 33 states and 102 transitions. [2019-01-11 11:14:50,371 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-01-11 11:14:50,371 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2019-01-11 11:14:50,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 11:14:50,372 INFO L225 Difference]: With dead ends: 33 [2019-01-11 11:14:50,372 INFO L226 Difference]: Without dead ends: 32 [2019-01-11 11:14:50,373 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-01-11 11:14:50,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-01-11 11:14:50,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 29. [2019-01-11 11:14:50,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-01-11 11:14:50,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 100 transitions. [2019-01-11 11:14:50,379 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 100 transitions. Word has length 4 [2019-01-11 11:14:50,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 11:14:50,380 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 100 transitions. [2019-01-11 11:14:50,380 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-01-11 11:14:50,380 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 100 transitions. [2019-01-11 11:14:50,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-11 11:14:50,380 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 11:14:50,380 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-11 11:14:50,381 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-11 11:14:50,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 11:14:50,381 INFO L82 PathProgramCache]: Analyzing trace with hash 941844, now seen corresponding path program 1 times [2019-01-11 11:14:50,381 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 11:14:50,382 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 11:14:50,382 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 11:14:50,382 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 11:14:50,382 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 11:14:50,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 11:14:50,444 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 11:14:50,444 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 11:14:50,444 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 11:14:50,444 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-11 11:14:50,445 INFO L207 CegarAbsIntRunner]: [0], [18], [32], [33] [2019-01-11 11:14:50,446 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-11 11:14:50,446 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-11 11:14:50,456 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-11 11:14:50,456 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 88 root evaluator evaluations with a maximum evaluation depth of 3. Performed 88 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2019-01-11 11:14:50,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 11:14:50,457 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-11 11:14:50,457 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 11:14:50,457 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-11 11:14:50,465 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 11:14:50,465 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-11 11:14:50,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 11:14:50,472 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 11:14:50,477 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 23 [2019-01-11 11:14:50,482 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 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 23 treesize of output 25 [2019-01-11 11:14:50,491 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:50,492 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 31 [2019-01-11 11:14:50,506 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:50,508 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:50,509 INFO L478 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 41 [2019-01-11 11:14:50,533 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:50,536 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:50,538 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:50,539 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:50,543 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:50,545 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 29 [2019-01-11 11:14:50,546 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2019-01-11 11:14:50,567 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:14:50,573 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:14:50,576 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:14:50,579 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:14:50,602 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 27 [2019-01-11 11:14:50,608 INFO L478 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 29 [2019-01-11 11:14:50,618 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:50,619 INFO L478 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 35 [2019-01-11 11:14:50,625 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:50,627 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:50,629 INFO L478 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 0 case distinctions, treesize of input 31 treesize of output 45 [2019-01-11 11:14:50,637 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:50,646 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:50,649 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:50,650 INFO L478 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 0 case distinctions, treesize of input 33 treesize of output 59 [2019-01-11 11:14:50,658 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:50,660 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:50,666 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:50,668 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:50,669 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 81 [2019-01-11 11:14:50,729 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:50,734 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:50,736 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:50,741 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:50,743 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:50,745 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 100 [2019-01-11 11:14:50,746 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-11 11:14:50,799 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:14:50,828 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:14:50,853 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:14:50,871 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:14:50,887 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:14:50,904 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:14:50,938 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-11 11:14:50,938 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 7 variables, input treesize:60, output treesize:55 [2019-01-11 11:14:50,991 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:50,997 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:50,998 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:51,000 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:51,001 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:51,002 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:51,003 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:51,006 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:51,007 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:51,009 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:51,010 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:51,019 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:51,021 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:51,022 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:51,028 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:51,030 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:51,042 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 104 [2019-01-11 11:14:51,044 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-01-11 11:14:51,256 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 11 dim-0 vars, and 2 xjuncts. [2019-01-11 11:14:51,256 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:65, output treesize:104 [2019-01-11 11:14:52,779 WARN L181 SmtUtils]: Spent 411.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 35 [2019-01-11 11:14:52,784 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 11:14:52,784 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 11:14:52,838 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 11:14:52,860 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-01-11 11:14:52,860 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [2, 2] total 6 [2019-01-11 11:14:52,860 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-01-11 11:14:52,860 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-01-11 11:14:52,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-01-11 11:14:52,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=30, Unknown=0, NotChecked=0, Total=56 [2019-01-11 11:14:52,861 INFO L87 Difference]: Start difference. First operand 29 states and 100 transitions. Second operand 4 states. [2019-01-11 11:14:52,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 11:14:52,909 INFO L93 Difference]: Finished difference Result 33 states and 111 transitions. [2019-01-11 11:14:52,909 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-01-11 11:14:52,909 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2019-01-11 11:14:52,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 11:14:52,910 INFO L225 Difference]: With dead ends: 33 [2019-01-11 11:14:52,911 INFO L226 Difference]: Without dead ends: 32 [2019-01-11 11:14:52,911 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=26, Invalid=30, Unknown=0, NotChecked=0, Total=56 [2019-01-11 11:14:52,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-01-11 11:14:52,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2019-01-11 11:14:52,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-01-11 11:14:52,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 110 transitions. [2019-01-11 11:14:52,918 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 110 transitions. Word has length 4 [2019-01-11 11:14:52,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 11:14:52,918 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 110 transitions. [2019-01-11 11:14:52,918 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-01-11 11:14:52,918 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 110 transitions. [2019-01-11 11:14:52,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-11 11:14:52,919 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 11:14:52,919 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-11 11:14:52,919 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-11 11:14:52,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 11:14:52,920 INFO L82 PathProgramCache]: Analyzing trace with hash 941532, now seen corresponding path program 1 times [2019-01-11 11:14:52,920 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 11:14:52,921 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 11:14:52,921 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 11:14:52,921 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 11:14:52,921 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 11:14:52,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 11:14:53,019 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 11:14:53,019 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 11:14:53,019 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 11:14:53,020 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-11 11:14:53,020 INFO L207 CegarAbsIntRunner]: [0], [18], [22], [31] [2019-01-11 11:14:53,021 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-11 11:14:53,021 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-11 11:14:53,027 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-11 11:14:53,027 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 88 root evaluator evaluations with a maximum evaluation depth of 3. Performed 88 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-11 11:14:53,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 11:14:53,028 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-11 11:14:53,028 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 11:14:53,028 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-11 11:14:53,038 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 11:14:53,038 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-11 11:14:53,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 11:14:53,047 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 11:14:53,106 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 27 [2019-01-11 11:14:53,114 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:53,115 INFO L478 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2019-01-11 11:14:53,118 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:53,119 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:53,120 INFO L478 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 29 treesize of output 43 [2019-01-11 11:14:53,125 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:53,126 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:53,127 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:53,128 INFO L478 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2019-01-11 11:14:53,135 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:53,138 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:53,139 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:53,139 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:53,140 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 75 [2019-01-11 11:14:53,149 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:53,152 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:53,155 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:53,158 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:53,159 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:53,159 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 97 [2019-01-11 11:14:53,166 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:53,166 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:53,185 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:53,186 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:53,187 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:53,187 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:53,189 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 120 [2019-01-11 11:14:53,190 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-11 11:14:53,248 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:14:53,283 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:14:53,310 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:14:53,331 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:14:53,350 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:14:53,367 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:14:53,408 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:53,409 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:53,410 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 38 [2019-01-11 11:14:53,414 INFO L478 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 29 [2019-01-11 11:14:53,418 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:53,419 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:53,419 INFO L478 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 25 treesize of output 39 [2019-01-11 11:14:53,424 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:53,425 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:53,426 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:53,426 INFO L478 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 53 [2019-01-11 11:14:53,540 WARN L181 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2019-01-11 11:14:53,545 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:53,545 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:53,546 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:53,548 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:53,549 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:53,550 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2019-01-11 11:14:53,550 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-11 11:14:53,553 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:14:53,555 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:14:53,558 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:14:53,560 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:14:53,588 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-11 11:14:53,588 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 6 variables, input treesize:71, output treesize:54 [2019-01-11 11:14:53,626 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:53,627 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:53,628 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:53,629 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:53,630 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:53,631 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:53,632 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:53,633 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:53,635 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:53,636 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:53,637 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:53,638 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:53,639 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:53,641 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:53,642 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:53,643 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:53,644 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:53,645 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:53,647 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:53,648 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:53,649 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:53,650 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:53,652 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 120 [2019-01-11 11:14:53,653 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 11:14:53,737 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-11 11:14:53,737 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:64, output treesize:54 [2019-01-11 11:14:53,863 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:53,864 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:53,864 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:53,865 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:53,866 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:53,867 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:53,868 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:53,869 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:53,871 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:53,872 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:53,873 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:53,874 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:53,875 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:53,877 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:53,878 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:53,879 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:53,880 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:53,881 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:53,883 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:53,884 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:53,885 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:53,886 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:53,887 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:53,888 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:53,890 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 24 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 134 [2019-01-11 11:14:53,891 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 11:14:54,037 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-11 11:14:54,038 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:66, output treesize:56 [2019-01-11 11:14:56,354 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 11:14:56,354 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 11:14:56,378 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 11:14:56,397 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-11 11:14:56,397 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-11 11:14:56,398 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-11 11:14:56,398 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-11 11:14:56,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-11 11:14:56,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2019-01-11 11:14:56,399 INFO L87 Difference]: Start difference. First operand 31 states and 110 transitions. Second operand 8 states. [2019-01-11 11:15:32,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 11:15:32,316 INFO L93 Difference]: Finished difference Result 74 states and 179 transitions. [2019-01-11 11:15:32,317 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-11 11:15:32,317 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-11 11:15:32,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 11:15:32,318 INFO L225 Difference]: With dead ends: 74 [2019-01-11 11:15:32,318 INFO L226 Difference]: Without dead ends: 72 [2019-01-11 11:15:32,319 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2019-01-11 11:15:32,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2019-01-11 11:15:32,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 38. [2019-01-11 11:15:32,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-01-11 11:15:32,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 139 transitions. [2019-01-11 11:15:32,327 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 139 transitions. Word has length 4 [2019-01-11 11:15:32,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 11:15:32,327 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 139 transitions. [2019-01-11 11:15:32,327 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-11 11:15:32,327 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 139 transitions. [2019-01-11 11:15:32,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-11 11:15:32,328 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 11:15:32,328 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-11 11:15:32,328 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-11 11:15:32,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 11:15:32,329 INFO L82 PathProgramCache]: Analyzing trace with hash 941160, now seen corresponding path program 1 times [2019-01-11 11:15:32,329 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 11:15:32,329 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 11:15:32,330 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 11:15:32,330 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 11:15:32,330 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 11:15:32,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 11:15:32,459 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 11:15:32,459 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 11:15:32,459 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 11:15:32,459 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-11 11:15:32,459 INFO L207 CegarAbsIntRunner]: [0], [10], [18], [31] [2019-01-11 11:15:32,460 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-11 11:15:32,460 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-11 11:15:32,466 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-11 11:15:32,466 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 88 root evaluator evaluations with a maximum evaluation depth of 3. Performed 88 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-11 11:15:32,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 11:15:32,467 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-11 11:15:32,467 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 11:15:32,467 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-11 11:15:32,479 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 11:15:32,479 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-11 11:15:32,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 11:15:32,487 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 11:15:32,575 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 27 [2019-01-11 11:15:32,588 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:32,589 INFO L478 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2019-01-11 11:15:32,595 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:32,596 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:32,596 INFO L478 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 29 treesize of output 43 [2019-01-11 11:15:32,607 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:32,609 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:32,611 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:32,612 INFO L478 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2019-01-11 11:15:32,619 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:32,622 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:32,623 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:32,623 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:32,624 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 75 [2019-01-11 11:15:32,630 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:32,631 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:32,632 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:32,634 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:32,635 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:32,636 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 97 [2019-01-11 11:15:32,643 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:32,645 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:32,646 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:32,648 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:32,650 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:32,655 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:32,656 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 120 [2019-01-11 11:15:32,657 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-11 11:15:32,717 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:15:32,754 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:15:32,785 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:15:32,807 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:15:32,823 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:15:32,842 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:15:32,888 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:32,889 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:32,889 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 49 [2019-01-11 11:15:32,893 INFO L478 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 37 [2019-01-11 11:15:32,908 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:32,909 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:32,910 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:32,912 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:32,913 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:32,914 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 64 [2019-01-11 11:15:32,921 INFO L478 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 0 case distinctions, treesize of input 40 treesize of output 59 [2019-01-11 11:15:32,969 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:32,970 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:32,971 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:32,972 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:32,973 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:32,974 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2019-01-11 11:15:32,975 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-11 11:15:32,977 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:15:32,978 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:15:32,980 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:15:32,983 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:15:33,011 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-11 11:15:33,012 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 6 variables, input treesize:85, output treesize:54 [2019-01-11 11:15:33,086 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:33,087 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:33,088 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:33,088 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:33,089 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:33,091 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:33,092 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:33,093 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:33,095 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:33,096 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:33,097 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:33,099 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:33,100 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:33,101 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:33,103 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:33,104 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:33,105 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:33,107 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:33,108 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:33,109 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:33,111 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:33,112 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:33,113 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 120 [2019-01-11 11:15:33,114 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 11:15:33,200 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-11 11:15:33,201 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:64, output treesize:54 [2019-01-11 11:15:33,399 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:33,400 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:33,400 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:33,402 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:33,403 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:33,404 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:33,405 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:33,407 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:33,408 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:33,409 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:33,411 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:33,412 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:33,413 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:33,415 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:33,416 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:33,417 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:33,419 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:33,420 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:33,421 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:33,423 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:33,424 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:33,425 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:33,426 INFO L683 Elim1Store]: detected equality via solver [2019-01-11 11:15:33,427 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 135 [2019-01-11 11:15:33,428 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 11:15:33,536 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-11 11:15:33,537 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:66, output treesize:54 [2019-01-11 11:15:35,838 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 11:15:35,839 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 11:15:35,865 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 11:15:35,884 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-11 11:15:35,884 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-11 11:15:35,884 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-11 11:15:35,884 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-11 11:15:35,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-11 11:15:35,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2019-01-11 11:15:35,887 INFO L87 Difference]: Start difference. First operand 38 states and 139 transitions. Second operand 8 states. [2019-01-11 11:16:13,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 11:16:13,258 INFO L93 Difference]: Finished difference Result 71 states and 181 transitions. [2019-01-11 11:16:13,259 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-11 11:16:13,259 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-11 11:16:13,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 11:16:13,260 INFO L225 Difference]: With dead ends: 71 [2019-01-11 11:16:13,260 INFO L226 Difference]: Without dead ends: 70 [2019-01-11 11:16:13,261 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2019-01-11 11:16:13,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2019-01-11 11:16:13,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 38. [2019-01-11 11:16:13,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-01-11 11:16:13,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 139 transitions. [2019-01-11 11:16:13,269 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 139 transitions. Word has length 4 [2019-01-11 11:16:13,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 11:16:13,270 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 139 transitions. [2019-01-11 11:16:13,270 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-11 11:16:13,270 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 139 transitions. [2019-01-11 11:16:13,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-11 11:16:13,270 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 11:16:13,271 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-11 11:16:13,271 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-11 11:16:13,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 11:16:13,271 INFO L82 PathProgramCache]: Analyzing trace with hash 941656, now seen corresponding path program 1 times [2019-01-11 11:16:13,271 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 11:16:13,272 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 11:16:13,272 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 11:16:13,272 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 11:16:13,272 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 11:16:13,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 11:16:13,364 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 11:16:13,364 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 11:16:13,364 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 11:16:13,365 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-11 11:16:13,365 INFO L207 CegarAbsIntRunner]: [0], [18], [26], [31] [2019-01-11 11:16:13,366 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-11 11:16:13,366 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-11 11:16:13,372 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-11 11:16:13,372 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 88 root evaluator evaluations with a maximum evaluation depth of 3. Performed 88 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-11 11:16:13,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 11:16:13,373 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-11 11:16:13,373 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 11:16:13,373 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-11 11:16:13,386 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 11:16:13,386 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-11 11:16:13,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 11:16:13,401 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 11:16:13,929 WARN L181 SmtUtils]: Spent 524.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2019-01-11 11:16:13,960 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:13,962 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:13,963 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 46 [2019-01-11 11:16:14,004 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:14,005 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:14,007 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:14,008 INFO L478 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 0 case distinctions, treesize of input 33 treesize of output 48 [2019-01-11 11:16:14,012 INFO L478 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 0 case distinctions, treesize of input 36 treesize of output 45 [2019-01-11 11:16:14,015 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:14,017 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:14,018 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:14,019 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 59 [2019-01-11 11:16:14,228 WARN L181 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 34 [2019-01-11 11:16:14,231 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:14,233 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:14,234 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:14,235 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:14,237 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:14,238 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2019-01-11 11:16:14,238 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2019-01-11 11:16:14,240 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:16:14,242 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:16:14,245 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:16:14,247 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:16:14,266 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 27 [2019-01-11 11:16:14,275 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:14,275 INFO L478 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2019-01-11 11:16:14,279 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:14,280 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:14,280 INFO L478 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 29 treesize of output 43 [2019-01-11 11:16:14,289 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:14,290 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:14,291 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:14,292 INFO L478 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2019-01-11 11:16:14,340 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:14,349 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:14,350 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:14,352 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:14,352 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 75 [2019-01-11 11:16:14,356 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:14,357 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:14,357 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:14,358 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:14,359 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:14,360 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 97 [2019-01-11 11:16:14,365 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:14,367 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:14,368 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:14,369 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:14,371 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:14,372 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:14,373 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 120 [2019-01-11 11:16:14,374 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-11 11:16:14,431 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:16:14,461 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:16:14,485 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:16:14,504 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:16:14,519 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:16:14,533 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:16:14,562 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-11 11:16:14,562 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 6 variables, input treesize:82, output treesize:54 [2019-01-11 11:16:14,593 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:14,594 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:14,595 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:14,597 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:14,598 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:14,599 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:14,601 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:14,602 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:14,603 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:14,605 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:14,606 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:14,607 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:14,609 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:14,610 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:14,612 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:14,613 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:14,614 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:14,616 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:14,617 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:14,619 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:14,620 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:14,622 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:14,623 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 120 [2019-01-11 11:16:14,624 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 11:16:14,711 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-11 11:16:14,712 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:64, output treesize:54 [2019-01-11 11:16:14,852 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:14,871 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:14,872 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:14,873 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:14,874 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:14,874 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:14,875 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:14,877 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:14,878 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:14,880 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:14,881 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:14,882 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:14,884 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:14,885 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:14,886 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:14,888 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:14,889 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:14,890 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:14,892 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:14,893 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:14,894 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:14,896 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:14,896 INFO L683 Elim1Store]: detected equality via solver [2019-01-11 11:16:14,897 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 135 [2019-01-11 11:16:14,898 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 11:16:14,984 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-11 11:16:14,984 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:66, output treesize:54 [2019-01-11 11:16:17,276 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 11:16:17,276 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 11:16:17,300 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 11:16:17,319 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-11 11:16:17,319 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-11 11:16:17,319 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-11 11:16:17,320 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-11 11:16:17,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-11 11:16:17,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2019-01-11 11:16:17,320 INFO L87 Difference]: Start difference. First operand 38 states and 139 transitions. Second operand 8 states. [2019-01-11 11:16:52,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 11:16:52,620 INFO L93 Difference]: Finished difference Result 71 states and 181 transitions. [2019-01-11 11:16:52,621 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-11 11:16:52,621 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-11 11:16:52,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 11:16:52,622 INFO L225 Difference]: With dead ends: 71 [2019-01-11 11:16:52,622 INFO L226 Difference]: Without dead ends: 69 [2019-01-11 11:16:52,623 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2019-01-11 11:16:52,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2019-01-11 11:16:52,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 37. [2019-01-11 11:16:52,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-01-11 11:16:52,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 138 transitions. [2019-01-11 11:16:52,632 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 138 transitions. Word has length 4 [2019-01-11 11:16:52,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 11:16:52,632 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 138 transitions. [2019-01-11 11:16:52,632 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-11 11:16:52,632 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 138 transitions. [2019-01-11 11:16:52,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-11 11:16:52,633 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 11:16:52,633 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-11 11:16:52,633 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-11 11:16:52,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 11:16:52,633 INFO L82 PathProgramCache]: Analyzing trace with hash 941718, now seen corresponding path program 1 times [2019-01-11 11:16:52,633 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 11:16:52,634 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 11:16:52,634 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 11:16:52,634 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 11:16:52,635 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 11:16:52,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 11:16:52,775 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 11:16:52,775 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 11:16:52,775 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 11:16:52,775 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-11 11:16:52,775 INFO L207 CegarAbsIntRunner]: [0], [18], [28], [31] [2019-01-11 11:16:52,776 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-11 11:16:52,776 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-11 11:16:52,782 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-11 11:16:52,783 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 88 root evaluator evaluations with a maximum evaluation depth of 3. Performed 88 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-11 11:16:52,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 11:16:52,783 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-11 11:16:52,783 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 11:16:52,783 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-11 11:16:52,796 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 11:16:52,796 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-11 11:16:52,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 11:16:52,807 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 11:16:52,867 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 27 [2019-01-11 11:16:52,874 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:52,874 INFO L478 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2019-01-11 11:16:52,877 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:52,878 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:52,879 INFO L478 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 29 treesize of output 43 [2019-01-11 11:16:52,884 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:52,885 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:52,886 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:52,887 INFO L478 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2019-01-11 11:16:52,891 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:52,893 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:52,894 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:52,896 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:52,897 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 75 [2019-01-11 11:16:52,926 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:52,936 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:52,937 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:52,938 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:52,940 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:52,941 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 97 [2019-01-11 11:16:52,946 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:52,948 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:52,949 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:52,950 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:52,952 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:52,953 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:52,954 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 120 [2019-01-11 11:16:52,955 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-11 11:16:53,015 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:16:53,051 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:16:53,080 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:16:53,103 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:16:53,120 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:16:53,136 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:16:53,178 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:53,179 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:53,179 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 38 [2019-01-11 11:16:53,183 INFO L478 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 29 [2019-01-11 11:16:53,222 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:53,223 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:53,224 INFO L478 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 25 treesize of output 39 [2019-01-11 11:16:53,227 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:53,228 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:53,228 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:53,229 INFO L478 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 53 [2019-01-11 11:16:53,257 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:53,258 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:53,259 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:53,261 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:53,262 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:53,263 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2019-01-11 11:16:53,263 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-11 11:16:53,267 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:16:53,268 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:16:53,270 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:16:53,276 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:16:53,304 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-11 11:16:53,305 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 6 variables, input treesize:71, output treesize:54 [2019-01-11 11:16:53,371 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:53,389 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:53,390 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:53,391 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:53,391 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:53,392 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:53,393 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:53,395 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:53,396 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:53,397 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:53,398 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:53,400 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:53,401 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:53,402 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:53,403 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:53,405 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:53,406 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:53,407 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:53,408 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:53,410 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:53,411 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:53,412 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:53,414 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 120 [2019-01-11 11:16:53,414 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 11:16:53,495 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-11 11:16:53,495 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:64, output treesize:54 [2019-01-11 11:16:53,692 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:53,693 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:53,694 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:53,695 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:53,696 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:53,697 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:53,698 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:53,700 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:53,701 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:53,703 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:53,704 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:53,705 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:53,707 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:53,708 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:53,710 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:53,711 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:53,713 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:53,714 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:53,716 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:53,717 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:53,719 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:53,720 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:53,721 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:53,723 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:53,724 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 24 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 142 [2019-01-11 11:16:53,725 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 11:16:53,852 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-11 11:16:53,853 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:66, output treesize:56 [2019-01-11 11:16:56,188 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 11:16:56,188 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 11:16:56,212 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 11:16:56,231 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-11 11:16:56,231 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-11 11:16:56,231 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-11 11:16:56,232 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-11 11:16:56,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-11 11:16:56,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2019-01-11 11:16:56,232 INFO L87 Difference]: Start difference. First operand 37 states and 138 transitions. Second operand 8 states. [2019-01-11 11:17:29,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 11:17:29,330 INFO L93 Difference]: Finished difference Result 74 states and 200 transitions. [2019-01-11 11:17:29,330 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-11 11:17:29,330 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-11 11:17:29,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 11:17:29,331 INFO L225 Difference]: With dead ends: 74 [2019-01-11 11:17:29,331 INFO L226 Difference]: Without dead ends: 63 [2019-01-11 11:17:29,332 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2019-01-11 11:17:29,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2019-01-11 11:17:29,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 35. [2019-01-11 11:17:29,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-01-11 11:17:29,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 155 transitions. [2019-01-11 11:17:29,341 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 155 transitions. Word has length 4 [2019-01-11 11:17:29,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 11:17:29,341 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 155 transitions. [2019-01-11 11:17:29,341 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-11 11:17:29,341 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 155 transitions. [2019-01-11 11:17:29,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-11 11:17:29,342 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 11:17:29,342 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-11 11:17:29,342 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-11 11:17:29,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 11:17:29,342 INFO L82 PathProgramCache]: Analyzing trace with hash 941284, now seen corresponding path program 1 times [2019-01-11 11:17:29,343 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 11:17:29,343 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 11:17:29,343 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 11:17:29,343 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 11:17:29,344 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 11:17:29,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 11:17:29,480 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 11:17:29,480 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 11:17:29,480 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 11:17:29,480 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-11 11:17:29,481 INFO L207 CegarAbsIntRunner]: [0], [14], [18], [31] [2019-01-11 11:17:29,482 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-11 11:17:29,482 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-11 11:17:29,487 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-11 11:17:29,487 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 88 root evaluator evaluations with a maximum evaluation depth of 3. Performed 88 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-11 11:17:29,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 11:17:29,487 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-11 11:17:29,488 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 11:17:29,488 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-11 11:17:29,501 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 11:17:29,501 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-11 11:17:29,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 11:17:29,509 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 11:17:29,564 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:29,565 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:29,566 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 38 [2019-01-11 11:17:29,569 INFO L478 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 29 [2019-01-11 11:17:29,573 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:29,574 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:29,575 INFO L478 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 25 treesize of output 39 [2019-01-11 11:17:29,579 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:29,580 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:29,581 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:29,582 INFO L478 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 53 [2019-01-11 11:17:29,608 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:29,609 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:29,611 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:29,612 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:29,613 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:29,614 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2019-01-11 11:17:29,615 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2019-01-11 11:17:29,617 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:17:29,619 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:17:29,622 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:17:29,624 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:17:29,640 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 27 [2019-01-11 11:17:29,643 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:29,644 INFO L478 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2019-01-11 11:17:29,655 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:29,655 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:29,656 INFO L478 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 29 treesize of output 43 [2019-01-11 11:17:29,659 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:29,671 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:29,672 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:29,672 INFO L478 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2019-01-11 11:17:29,712 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:29,714 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:29,715 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:29,716 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:29,718 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 75 [2019-01-11 11:17:29,722 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:29,722 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:29,723 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:29,724 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:29,725 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:29,727 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 97 [2019-01-11 11:17:29,731 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:29,732 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:29,732 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:29,733 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:29,734 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:29,735 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:29,737 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 120 [2019-01-11 11:17:29,738 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-11 11:17:29,795 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:17:29,827 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:17:29,853 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:17:29,873 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:17:29,887 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:17:29,902 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:17:29,927 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-11 11:17:29,927 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 6 variables, input treesize:71, output treesize:54 [2019-01-11 11:17:29,955 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:29,956 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:29,957 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:29,959 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:29,960 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:29,961 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:29,963 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:29,964 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:29,966 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:29,967 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:29,969 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:29,970 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:29,971 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:29,973 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:29,974 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:29,976 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:29,977 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:29,979 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:29,980 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:29,981 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:29,983 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:29,984 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:29,985 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 120 [2019-01-11 11:17:29,986 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 11:17:30,074 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-11 11:17:30,075 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:64, output treesize:54 [2019-01-11 11:17:30,121 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:30,122 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:30,123 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:30,123 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:30,124 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:30,125 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:30,126 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:30,128 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:30,129 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:30,130 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:30,131 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:30,133 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:30,134 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:30,135 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:30,136 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:30,138 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:30,139 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:30,140 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:30,141 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:30,142 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:30,144 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:30,145 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:30,146 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:30,148 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:30,149 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 24 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 142 [2019-01-11 11:17:30,150 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 11:17:30,240 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-11 11:17:30,240 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:66, output treesize:56 [2019-01-11 11:17:32,546 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 11:17:32,546 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 11:17:32,631 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 11:17:32,650 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-11 11:17:32,650 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-11 11:17:32,650 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-11 11:17:32,650 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-11 11:17:32,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-11 11:17:32,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2019-01-11 11:17:32,651 INFO L87 Difference]: Start difference. First operand 35 states and 155 transitions. Second operand 8 states. [2019-01-11 11:17:46,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 11:17:46,116 INFO L93 Difference]: Finished difference Result 67 states and 213 transitions. [2019-01-11 11:17:46,116 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-11 11:17:46,116 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-11 11:17:46,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 11:17:46,118 INFO L225 Difference]: With dead ends: 67 [2019-01-11 11:17:46,118 INFO L226 Difference]: Without dead ends: 65 [2019-01-11 11:17:46,118 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2019-01-11 11:17:46,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-01-11 11:17:46,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 38. [2019-01-11 11:17:46,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-01-11 11:17:46,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 178 transitions. [2019-01-11 11:17:46,127 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 178 transitions. Word has length 4 [2019-01-11 11:17:46,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 11:17:46,127 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 178 transitions. [2019-01-11 11:17:46,127 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-11 11:17:46,127 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 178 transitions. [2019-01-11 11:17:46,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-11 11:17:46,128 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 11:17:46,128 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-11 11:17:46,128 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-11 11:17:46,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 11:17:46,128 INFO L82 PathProgramCache]: Analyzing trace with hash 930312, now seen corresponding path program 1 times [2019-01-11 11:17:46,129 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 11:17:46,129 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 11:17:46,129 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 11:17:46,130 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 11:17:46,130 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 11:17:46,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 11:17:46,192 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 11:17:46,193 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 11:17:46,193 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 11:17:46,193 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-11 11:17:46,193 INFO L207 CegarAbsIntRunner]: [0], [6], [32], [33] [2019-01-11 11:17:46,195 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-11 11:17:46,195 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-11 11:17:46,202 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-11 11:17:46,202 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 88 root evaluator evaluations with a maximum evaluation depth of 3. Performed 88 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2019-01-11 11:17:46,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 11:17:46,203 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-11 11:17:46,203 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 11:17:46,203 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-11 11:17:46,211 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 11:17:46,211 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-11 11:17:46,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 11:17:46,219 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 11:17:46,260 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 27 [2019-01-11 11:17:46,268 INFO L478 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2019-01-11 11:17:46,272 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:46,273 INFO L478 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 39 [2019-01-11 11:17:46,280 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:46,282 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:46,283 INFO L478 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 0 case distinctions, treesize of input 31 treesize of output 49 [2019-01-11 11:17:46,293 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:46,296 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:46,297 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:46,298 INFO L478 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 0 case distinctions, treesize of input 33 treesize of output 63 [2019-01-11 11:17:46,307 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:46,311 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:46,315 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:46,316 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:46,318 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:46,318 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 85 [2019-01-11 11:17:46,323 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:46,325 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:46,326 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:46,330 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:46,331 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:46,333 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 17 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 104 [2019-01-11 11:17:46,333 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-11 11:17:46,396 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:17:46,425 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:17:46,450 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:17:46,471 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:17:46,486 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:17:46,502 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:17:46,545 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:46,545 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 38 [2019-01-11 11:17:46,549 INFO L478 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 29 [2019-01-11 11:17:46,552 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:46,553 INFO L478 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 35 [2019-01-11 11:17:46,558 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:46,560 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:46,561 INFO L478 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 0 case distinctions, treesize of input 27 treesize of output 45 [2019-01-11 11:17:46,584 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:46,587 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:46,588 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:46,589 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:46,591 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:46,592 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 33 [2019-01-11 11:17:46,593 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-11 11:17:46,608 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:17:46,658 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:17:46,661 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:17:46,666 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:17:46,699 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-11 11:17:46,700 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 7 variables, input treesize:68, output treesize:59 [2019-01-11 11:17:46,757 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:46,780 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:46,802 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:46,839 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:46,840 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:46,842 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:46,842 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:46,844 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:46,846 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:46,848 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:46,849 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:46,851 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:46,853 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:46,854 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:46,858 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:46,860 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:46,860 INFO L303 Elim1Store]: Index analysis took 136 ms [2019-01-11 11:17:46,893 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 18 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 8 case distinctions, treesize of input 46 treesize of output 120 [2019-01-11 11:17:46,898 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 16 xjuncts. [2019-01-11 11:17:47,280 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 26 dim-0 vars, and 5 xjuncts. [2019-01-11 11:17:47,280 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:69, output treesize:236 [2019-01-11 11:18:10,211 WARN L181 SmtUtils]: Spent 22.08 s on a formula simplification that was a NOOP. DAG size: 126 [2019-01-11 11:18:10,218 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 11:18:10,218 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 11:18:10,237 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 11:18:10,256 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-11 11:18:10,256 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-01-11 11:18:10,257 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-11 11:18:10,257 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-01-11 11:18:10,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-01-11 11:18:10,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-01-11 11:18:10,257 INFO L87 Difference]: Start difference. First operand 38 states and 178 transitions. Second operand 6 states. [2019-01-11 11:18:56,142 WARN L181 SmtUtils]: Spent 45.68 s on a formula simplification. DAG size of input: 133 DAG size of output: 131 [2019-01-11 11:18:58,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 11:18:58,491 INFO L93 Difference]: Finished difference Result 63 states and 216 transitions. [2019-01-11 11:18:58,492 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-01-11 11:18:58,492 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 4 [2019-01-11 11:18:58,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 11:18:58,493 INFO L225 Difference]: With dead ends: 63 [2019-01-11 11:18:58,493 INFO L226 Difference]: Without dead ends: 62 [2019-01-11 11:18:58,493 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 68.7s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2019-01-11 11:18:58,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-01-11 11:18:58,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 39. [2019-01-11 11:18:58,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-01-11 11:18:58,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 186 transitions. [2019-01-11 11:18:58,501 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 186 transitions. Word has length 4 [2019-01-11 11:18:58,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 11:18:58,501 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 186 transitions. [2019-01-11 11:18:58,501 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-01-11 11:18:58,502 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 186 transitions. [2019-01-11 11:18:58,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-11 11:18:58,502 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 11:18:58,502 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-11 11:18:58,503 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-11 11:18:58,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 11:18:58,503 INFO L82 PathProgramCache]: Analyzing trace with hash 929876, now seen corresponding path program 1 times [2019-01-11 11:18:58,503 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 11:18:58,504 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 11:18:58,504 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 11:18:58,504 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 11:18:58,504 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 11:18:58,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 11:18:58,583 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 11:18:58,583 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 11:18:58,583 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 11:18:58,583 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-11 11:18:58,583 INFO L207 CegarAbsIntRunner]: [0], [6], [18], [31] [2019-01-11 11:18:58,585 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-11 11:18:58,585 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-11 11:18:58,589 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-11 11:18:58,589 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 88 root evaluator evaluations with a maximum evaluation depth of 3. Performed 88 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-11 11:18:58,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 11:18:58,589 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-11 11:18:58,589 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 11:18:58,590 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-11 11:18:58,600 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 11:18:58,601 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-11 11:18:58,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 11:18:58,608 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 11:18:58,663 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 27 [2019-01-11 11:18:58,682 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:18:58,682 INFO L478 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2019-01-11 11:18:58,688 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:18:58,689 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:18:58,690 INFO L478 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 29 treesize of output 43 [2019-01-11 11:18:58,723 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:18:58,724 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:18:58,725 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:18:58,726 INFO L478 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2019-01-11 11:18:58,732 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:18:58,733 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:18:58,734 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:18:58,735 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:18:58,738 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 75 [2019-01-11 11:18:58,781 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:18:58,782 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:18:58,783 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:18:58,784 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:18:58,785 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:18:58,785 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 97 [2019-01-11 11:18:58,790 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:18:58,791 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:18:58,792 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:18:58,794 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:18:58,795 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:18:58,797 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:18:58,798 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 120 [2019-01-11 11:18:58,799 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-11 11:18:58,859 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:18:58,894 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:18:58,921 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:18:58,941 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:18:58,956 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:18:58,972 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:18:59,014 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:18:59,015 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:18:59,016 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 38 [2019-01-11 11:18:59,019 INFO L478 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 29 [2019-01-11 11:18:59,022 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:18:59,023 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:18:59,024 INFO L478 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 25 treesize of output 39 [2019-01-11 11:18:59,028 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:18:59,029 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:18:59,030 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:18:59,031 INFO L478 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 53 [2019-01-11 11:18:59,060 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:18:59,060 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:18:59,061 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:18:59,062 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:18:59,063 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:18:59,064 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2019-01-11 11:18:59,065 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-11 11:18:59,092 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:18:59,109 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:18:59,133 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:18:59,135 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:18:59,163 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-11 11:18:59,163 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 7 variables, input treesize:71, output treesize:54 [2019-01-11 11:18:59,186 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:18:59,187 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:18:59,188 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:18:59,190 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:18:59,191 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:18:59,192 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:18:59,193 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:18:59,194 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:18:59,196 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:18:59,197 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:18:59,198 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:18:59,199 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:18:59,201 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:18:59,202 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:18:59,203 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:18:59,204 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:18:59,206 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:18:59,207 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:18:59,208 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:18:59,209 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:18:59,211 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:18:59,212 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:18:59,213 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 126 [2019-01-11 11:18:59,214 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 11:18:59,304 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-11 11:18:59,305 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:64, output treesize:54 [2019-01-11 11:18:59,364 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:18:59,365 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:18:59,365 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:18:59,366 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:18:59,367 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:18:59,368 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:18:59,369 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:18:59,371 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:18:59,372 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:18:59,373 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:18:59,374 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:18:59,376 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:18:59,377 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:18:59,378 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:18:59,379 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:18:59,381 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:18:59,382 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:18:59,383 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:18:59,384 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:18:59,386 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:18:59,387 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:18:59,388 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:18:59,389 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:18:59,390 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:18:59,391 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 24 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 132 [2019-01-11 11:18:59,392 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 11:18:59,484 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-11 11:18:59,484 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:64, output treesize:54 [2019-01-11 11:19:00,699 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 11:19:00,699 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 11:19:00,724 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 11:19:00,742 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-11 11:19:00,742 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-11 11:19:00,742 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-11 11:19:00,742 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-11 11:19:00,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-11 11:19:00,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2019-01-11 11:19:00,743 INFO L87 Difference]: Start difference. First operand 39 states and 186 transitions. Second operand 8 states. [2019-01-11 11:19:23,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 11:19:23,553 INFO L93 Difference]: Finished difference Result 92 states and 272 transitions. [2019-01-11 11:19:23,553 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-01-11 11:19:23,553 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-11 11:19:23,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 11:19:23,555 INFO L225 Difference]: With dead ends: 92 [2019-01-11 11:19:23,555 INFO L226 Difference]: Without dead ends: 90 [2019-01-11 11:19:23,555 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2019-01-11 11:19:23,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2019-01-11 11:19:23,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 46. [2019-01-11 11:19:23,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-01-11 11:19:23,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 222 transitions. [2019-01-11 11:19:23,565 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 222 transitions. Word has length 4 [2019-01-11 11:19:23,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 11:19:23,566 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 222 transitions. [2019-01-11 11:19:23,566 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-11 11:19:23,566 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 222 transitions. [2019-01-11 11:19:23,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-11 11:19:23,567 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 11:19:23,567 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-11 11:19:23,567 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-11 11:19:23,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 11:19:23,567 INFO L82 PathProgramCache]: Analyzing trace with hash 929628, now seen corresponding path program 1 times [2019-01-11 11:19:23,567 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 11:19:23,568 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 11:19:23,568 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 11:19:23,568 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 11:19:23,568 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 11:19:23,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 11:19:23,665 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 11:19:23,665 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 11:19:23,665 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 11:19:23,666 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-11 11:19:23,666 INFO L207 CegarAbsIntRunner]: [0], [6], [10], [31] [2019-01-11 11:19:23,667 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-11 11:19:23,667 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-11 11:19:23,671 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-11 11:19:23,671 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 88 root evaluator evaluations with a maximum evaluation depth of 3. Performed 88 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-11 11:19:23,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 11:19:23,672 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-11 11:19:23,672 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 11:19:23,672 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-11 11:19:23,682 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 11:19:23,682 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-11 11:19:23,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 11:19:23,690 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 11:19:23,783 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 27 [2019-01-11 11:19:23,787 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:19:23,787 INFO L478 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2019-01-11 11:19:23,791 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:19:23,793 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:19:23,793 INFO L478 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 29 treesize of output 43 [2019-01-11 11:19:23,798 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:19:23,798 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:19:23,799 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:19:23,800 INFO L478 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2019-01-11 11:19:23,804 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:19:23,807 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:19:23,808 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:19:23,810 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:19:23,810 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 75 [2019-01-11 11:19:23,814 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:19:23,815 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:19:23,817 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:19:23,818 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:19:23,820 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:19:23,821 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 97 [2019-01-11 11:19:23,826 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:19:23,827 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:19:23,829 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:19:23,830 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:19:23,832 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:19:23,834 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:19:23,835 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 120 [2019-01-11 11:19:23,836 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-11 11:19:23,896 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:19:23,933 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:19:23,960 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:19:23,986 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:19:24,004 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:19:24,022 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:19:24,072 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:19:24,073 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:19:24,074 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 49 [2019-01-11 11:19:24,093 INFO L478 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 37 [2019-01-11 11:19:24,108 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:19:24,109 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:19:24,111 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:19:24,112 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:19:24,113 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:19:24,114 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 64 [2019-01-11 11:19:24,119 INFO L478 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 0 case distinctions, treesize of input 40 treesize of output 59 [2019-01-11 11:19:24,170 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:19:24,171 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:19:24,173 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:19:24,174 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:19:24,175 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:19:24,176 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2019-01-11 11:19:24,177 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-11 11:19:24,180 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:19:24,181 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:19:24,183 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:19:24,185 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:19:24,213 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-11 11:19:24,213 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 7 variables, input treesize:85, output treesize:54 [2019-01-11 11:19:24,236 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:19:24,237 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:19:24,238 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:19:24,239 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:19:24,239 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:19:24,240 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:19:24,242 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:19:24,243 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:19:24,244 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:19:24,245 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:19:24,247 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:19:24,248 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:19:24,249 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:19:24,250 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:19:24,252 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:19:24,253 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:19:24,254 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:19:24,255 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:19:24,256 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:19:24,258 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:19:24,259 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:19:24,260 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:19:24,261 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 126 [2019-01-11 11:19:24,262 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 11:19:24,354 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-11 11:19:24,355 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:64, output treesize:54 [2019-01-11 11:19:24,378 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:19:24,380 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:19:24,381 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:19:24,383 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:19:24,384 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:19:24,385 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:19:24,387 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:19:24,388 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:19:24,390 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:19:24,391 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:19:24,393 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:19:24,394 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:19:24,395 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:19:24,397 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:19:24,398 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:19:24,400 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:19:24,401 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:19:24,402 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:19:24,404 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:19:24,405 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:19:24,407 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:19:24,408 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:19:24,409 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:19:24,411 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:19:24,412 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 24 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 140 [2019-01-11 11:19:24,413 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 11:19:24,510 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-11 11:19:24,510 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:64, output treesize:54 [2019-01-11 11:19:25,708 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 11:19:25,708 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 11:19:25,728 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 11:19:25,746 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-11 11:19:25,746 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-11 11:19:25,746 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-11 11:19:25,746 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-11 11:19:25,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-11 11:19:25,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2019-01-11 11:19:25,747 INFO L87 Difference]: Start difference. First operand 46 states and 222 transitions. Second operand 8 states. [2019-01-11 11:19:46,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 11:19:46,645 INFO L93 Difference]: Finished difference Result 96 states and 311 transitions. [2019-01-11 11:19:46,645 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-01-11 11:19:46,645 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-11 11:19:46,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 11:19:46,647 INFO L225 Difference]: With dead ends: 96 [2019-01-11 11:19:46,647 INFO L226 Difference]: Without dead ends: 95 [2019-01-11 11:19:46,648 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2019-01-11 11:19:46,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2019-01-11 11:19:46,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 51. [2019-01-11 11:19:46,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-01-11 11:19:46,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 262 transitions. [2019-01-11 11:19:46,659 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 262 transitions. Word has length 4 [2019-01-11 11:19:46,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 11:19:46,660 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 262 transitions. [2019-01-11 11:19:46,660 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-11 11:19:46,660 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 262 transitions. [2019-01-11 11:19:46,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-11 11:19:46,661 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 11:19:46,661 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-11 11:19:46,661 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-11 11:19:46,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 11:19:46,662 INFO L82 PathProgramCache]: Analyzing trace with hash 930124, now seen corresponding path program 1 times [2019-01-11 11:19:46,662 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 11:19:46,663 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 11:19:46,663 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 11:19:46,663 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 11:19:46,663 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 11:19:46,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 11:19:46,726 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 11:19:46,726 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 11:19:46,726 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 11:19:46,727 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-11 11:19:46,727 INFO L207 CegarAbsIntRunner]: [0], [6], [26], [31] [2019-01-11 11:19:46,728 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-11 11:19:46,728 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-11 11:19:46,732 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-11 11:19:46,732 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 88 root evaluator evaluations with a maximum evaluation depth of 3. Performed 88 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-11 11:19:46,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 11:19:46,733 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-11 11:19:46,733 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 11:19:46,733 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-11 11:19:46,753 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 11:19:46,753 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-11 11:19:46,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 11:19:46,771 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 11:19:46,837 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:19:46,839 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:19:46,839 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 49 [2019-01-11 11:19:46,843 INFO L478 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 37 [2019-01-11 11:19:46,861 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:19:46,862 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:19:46,864 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:19:46,865 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:19:46,866 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:19:46,867 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 64 [2019-01-11 11:19:46,872 INFO L478 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 0 case distinctions, treesize of input 40 treesize of output 59 [2019-01-11 11:19:46,923 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:19:46,924 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:19:46,926 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:19:46,927 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:19:46,928 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:19:46,929 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2019-01-11 11:19:46,930 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2019-01-11 11:19:46,932 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:19:46,934 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:19:46,936 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:19:46,939 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:19:46,956 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 27 [2019-01-11 11:19:46,961 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:19:46,962 INFO L478 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2019-01-11 11:19:46,965 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:19:46,965 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:19:46,966 INFO L478 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 29 treesize of output 43 [2019-01-11 11:19:46,976 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:19:46,977 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:19:46,981 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:19:46,982 INFO L478 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2019-01-11 11:19:46,985 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:19:46,986 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:19:46,987 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:19:46,987 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:19:46,988 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 75 [2019-01-11 11:19:47,034 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:19:47,057 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:19:47,079 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:19:47,101 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:19:47,115 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:19:47,116 INFO L303 Elim1Store]: Index analysis took 124 ms [2019-01-11 11:19:47,117 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 97 [2019-01-11 11:19:47,153 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:19:47,171 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:19:47,192 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:19:47,217 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:19:47,238 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:19:47,265 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:19:47,266 INFO L303 Elim1Store]: Index analysis took 145 ms [2019-01-11 11:19:47,267 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 120 [2019-01-11 11:19:47,268 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-11 11:19:47,544 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:19:47,576 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:19:47,602 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:19:47,622 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:19:47,638 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:19:47,652 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:19:47,678 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-11 11:19:47,679 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 7 variables, input treesize:85, output treesize:54 [2019-01-11 11:19:47,715 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:19:47,716 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:19:47,717 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:19:47,717 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:19:47,718 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:19:47,719 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:19:47,721 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:19:47,722 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:19:47,723 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:19:47,724 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:19:47,726 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:19:47,727 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:19:47,728 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:19:47,729 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:19:47,730 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:19:47,732 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:19:47,733 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:19:47,734 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:19:47,735 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:19:47,737 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:19:47,738 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:19:47,739 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:19:47,740 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 126 [2019-01-11 11:19:47,742 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 11:19:47,826 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-11 11:19:47,826 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:64, output treesize:54 [2019-01-11 11:19:47,853 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:19:47,853 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:19:47,854 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:19:47,856 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:19:47,857 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:19:47,858 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:19:47,859 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:19:47,860 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:19:47,862 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:19:47,863 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:19:47,864 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:19:47,865 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:19:47,867 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:19:47,868 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:19:47,869 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:19:47,870 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:19:47,872 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:19:47,873 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:19:47,874 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:19:47,875 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:19:47,876 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:19:47,877 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:19:47,879 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:19:47,880 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:19:47,881 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 24 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 140 [2019-01-11 11:19:47,882 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 11:19:47,978 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-11 11:19:47,979 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:64, output treesize:54 [2019-01-11 11:19:49,190 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 11:19:49,190 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 11:19:49,211 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 11:19:49,229 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-11 11:19:49,230 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-11 11:19:49,230 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-11 11:19:49,230 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-11 11:19:49,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-11 11:19:49,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2019-01-11 11:19:49,230 INFO L87 Difference]: Start difference. First operand 51 states and 262 transitions. Second operand 8 states. [2019-01-11 11:20:09,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 11:20:09,609 INFO L93 Difference]: Finished difference Result 100 states and 343 transitions. [2019-01-11 11:20:09,609 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-01-11 11:20:09,609 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-11 11:20:09,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 11:20:09,611 INFO L225 Difference]: With dead ends: 100 [2019-01-11 11:20:09,611 INFO L226 Difference]: Without dead ends: 98 [2019-01-11 11:20:09,612 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2019-01-11 11:20:09,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2019-01-11 11:20:09,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 57. [2019-01-11 11:20:09,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2019-01-11 11:20:09,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 297 transitions. [2019-01-11 11:20:09,623 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 297 transitions. Word has length 4 [2019-01-11 11:20:09,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 11:20:09,623 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 297 transitions. [2019-01-11 11:20:09,623 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-11 11:20:09,623 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 297 transitions. [2019-01-11 11:20:09,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-11 11:20:09,624 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 11:20:09,624 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-11 11:20:09,624 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-11 11:20:09,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 11:20:09,625 INFO L82 PathProgramCache]: Analyzing trace with hash 945688, now seen corresponding path program 1 times [2019-01-11 11:20:09,625 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 11:20:09,625 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 11:20:09,626 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 11:20:09,626 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 11:20:09,626 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 11:20:09,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 11:20:09,671 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 11:20:09,671 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 11:20:09,671 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 11:20:09,672 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-11 11:20:09,672 INFO L207 CegarAbsIntRunner]: [0], [22], [32], [33] [2019-01-11 11:20:09,674 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-11 11:20:09,674 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-11 11:20:09,678 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-11 11:20:09,678 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 88 root evaluator evaluations with a maximum evaluation depth of 3. Performed 88 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2019-01-11 11:20:09,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 11:20:09,679 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-11 11:20:09,679 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 11:20:09,679 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-11 11:20:09,690 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 11:20:09,690 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-11 11:20:09,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 11:20:09,699 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 11:20:09,798 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 27 [2019-01-11 11:20:09,803 INFO L478 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2019-01-11 11:20:09,810 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:20:09,811 INFO L478 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 39 [2019-01-11 11:20:09,817 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:20:09,818 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:20:09,819 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:20:09,820 INFO L478 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 0 case distinctions, treesize of input 31 treesize of output 53 [2019-01-11 11:20:09,826 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:20:09,829 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:20:09,830 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:20:09,831 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 8 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 67 [2019-01-11 11:20:09,835 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:20:09,838 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:20:09,840 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:20:09,841 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:20:09,843 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:20:09,844 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 89 [2019-01-11 11:20:09,871 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:20:09,873 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:20:09,875 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:20:09,880 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:20:09,881 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:20:09,882 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 108 [2019-01-11 11:20:09,883 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-11 11:20:09,935 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:20:09,964 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:20:09,988 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:20:10,008 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:20:10,027 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:20:10,044 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:20:10,092 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:20:10,093 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 49 [2019-01-11 11:20:10,097 INFO L478 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 37 [2019-01-11 11:20:10,112 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:20:10,113 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:20:10,116 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:20:10,117 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:20:10,118 INFO L478 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 58 [2019-01-11 11:20:10,122 INFO L478 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 0 case distinctions, treesize of input 38 treesize of output 49 [2019-01-11 11:20:10,148 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:20:10,148 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:20:10,149 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:20:10,150 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:20:10,152 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:20:10,153 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 37 [2019-01-11 11:20:10,154 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-11 11:20:10,170 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:20:10,181 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:20:10,189 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:20:10,196 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:20:10,231 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-11 11:20:10,231 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 7 variables, input treesize:82, output treesize:63 [2019-01-11 11:20:10,287 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:20:10,288 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:20:10,289 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:20:10,290 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:20:10,291 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:20:10,291 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:20:10,292 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:20:10,295 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:20:10,296 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:20:10,297 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:20:10,299 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:20:10,300 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:20:10,302 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:20:10,303 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:20:10,307 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:20:10,308 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:20:10,318 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 19 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 118 [2019-01-11 11:20:10,319 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-01-11 11:20:10,517 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 11 dim-0 vars, and 2 xjuncts. [2019-01-11 11:20:10,518 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:73, output treesize:114 [2019-01-11 11:20:11,875 WARN L181 SmtUtils]: Spent 364.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 38 [2019-01-11 11:20:11,878 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 11:20:11,878 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 11:20:12,071 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 11:20:12,119 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-11 11:20:12,119 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-01-11 11:20:12,120 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-11 11:20:12,120 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-01-11 11:20:12,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-01-11 11:20:12,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-01-11 11:20:12,121 INFO L87 Difference]: Start difference. First operand 57 states and 297 transitions. Second operand 6 states. [2019-01-11 11:20:12,534 WARN L181 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2019-01-11 11:20:15,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 11:20:15,212 INFO L93 Difference]: Finished difference Result 81 states and 327 transitions. [2019-01-11 11:20:15,212 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-01-11 11:20:15,212 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 4 [2019-01-11 11:20:15,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 11:20:15,213 INFO L225 Difference]: With dead ends: 81 [2019-01-11 11:20:15,213 INFO L226 Difference]: Without dead ends: 80 [2019-01-11 11:20:15,213 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2019-01-11 11:20:15,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2019-01-11 11:20:15,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 57. [2019-01-11 11:20:15,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2019-01-11 11:20:15,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 297 transitions. [2019-01-11 11:20:15,223 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 297 transitions. Word has length 4 [2019-01-11 11:20:15,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 11:20:15,224 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 297 transitions. [2019-01-11 11:20:15,224 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-01-11 11:20:15,224 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 297 transitions. [2019-01-11 11:20:15,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-11 11:20:15,225 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 11:20:15,225 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-11 11:20:15,225 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-11 11:20:15,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 11:20:15,225 INFO L82 PathProgramCache]: Analyzing trace with hash 945004, now seen corresponding path program 1 times [2019-01-11 11:20:15,225 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 11:20:15,226 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 11:20:15,226 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 11:20:15,226 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 11:20:15,226 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 11:20:15,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 11:20:15,325 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 11:20:15,325 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 11:20:15,325 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 11:20:15,325 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-11 11:20:15,325 INFO L207 CegarAbsIntRunner]: [0], [10], [22], [31] [2019-01-11 11:20:15,326 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-11 11:20:15,326 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-11 11:20:15,330 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-11 11:20:15,330 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 88 root evaluator evaluations with a maximum evaluation depth of 3. Performed 88 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-11 11:20:15,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 11:20:15,330 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-11 11:20:15,331 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 11:20:15,331 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-11 11:20:15,343 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 11:20:15,343 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-11 11:20:15,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 11:20:15,361 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 11:20:15,431 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 27 [2019-01-11 11:20:15,438 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:20:15,438 INFO L478 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2019-01-11 11:20:15,442 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:20:15,444 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:20:15,445 INFO L478 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 29 treesize of output 43 [2019-01-11 11:20:15,449 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:20:15,450 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:20:15,450 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:20:15,451 INFO L478 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2019-01-11 11:20:15,456 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:20:15,456 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:20:15,457 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:20:15,458 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:20:15,459 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 75 [2019-01-11 11:20:15,464 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:20:15,465 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:20:15,466 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:20:15,467 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:20:15,467 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:20:15,469 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 97 [2019-01-11 11:20:15,474 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:20:15,475 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:20:15,476 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:20:15,478 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:20:15,479 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:20:15,480 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:20:15,482 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 120 [2019-01-11 11:20:15,483 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-11 11:20:15,541 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:20:15,573 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:20:15,601 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:20:15,624 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:20:15,644 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:20:15,661 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:20:15,710 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:20:15,710 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:20:15,711 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 46 [2019-01-11 11:20:15,740 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:20:15,741 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:20:15,742 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:20:15,743 INFO L478 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 0 case distinctions, treesize of input 33 treesize of output 48 [2019-01-11 11:20:15,746 INFO L478 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 0 case distinctions, treesize of input 36 treesize of output 45 [2019-01-11 11:20:15,749 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:20:15,751 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:20:15,752 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:20:15,753 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 59 [2019-01-11 11:20:15,803 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:20:15,804 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:20:15,805 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:20:15,806 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:20:15,807 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:20:15,808 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2019-01-11 11:20:15,809 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-11 11:20:15,811 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:20:15,812 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:20:15,814 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:20:15,818 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:20:15,851 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-11 11:20:15,851 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 6 variables, input treesize:82, output treesize:54 [2019-01-11 11:20:15,882 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:20:15,883 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:20:15,884 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:20:15,885 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:20:15,886 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:20:15,886 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:20:15,888 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:20:15,889 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:20:15,890 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:20:15,891 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:20:15,893 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:20:15,894 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:20:15,895 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:20:15,896 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:20:15,897 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:20:15,899 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:20:15,900 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:20:15,901 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:20:15,902 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:20:15,904 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:20:15,908 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:20:15,909 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:20:15,910 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 126 [2019-01-11 11:20:15,911 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 11:20:16,002 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-11 11:20:16,002 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:64, output treesize:54 [2019-01-11 11:20:16,217 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:20:16,232 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:20:16,233 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:20:16,234 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:20:16,235 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:20:16,236 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:20:16,237 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:20:16,239 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:20:16,240 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:20:16,241 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:20:16,243 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:20:16,244 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:20:16,246 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:20:16,247 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:20:16,249 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:20:16,250 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:20:16,251 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:20:16,253 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:20:16,254 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:20:16,256 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:20:16,257 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:20:16,258 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:20:16,260 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:20:16,261 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:20:16,262 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 24 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 140 [2019-01-11 11:20:16,263 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 11:20:16,359 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-11 11:20:16,360 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:64, output treesize:54 [2019-01-11 11:20:18,744 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 11:20:18,745 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 11:20:18,801 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 11:20:18,819 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-11 11:20:18,819 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-11 11:20:18,819 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-11 11:20:18,820 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-11 11:20:18,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-11 11:20:18,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2019-01-11 11:20:18,820 INFO L87 Difference]: Start difference. First operand 57 states and 297 transitions. Second operand 8 states. [2019-01-11 11:20:45,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 11:20:45,067 INFO L93 Difference]: Finished difference Result 98 states and 365 transitions. [2019-01-11 11:20:45,067 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-11 11:20:45,068 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-11 11:20:45,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 11:20:45,069 INFO L225 Difference]: With dead ends: 98 [2019-01-11 11:20:45,070 INFO L226 Difference]: Without dead ends: 97 [2019-01-11 11:20:45,070 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2019-01-11 11:20:45,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2019-01-11 11:20:45,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 59. [2019-01-11 11:20:45,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-01-11 11:20:45,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 313 transitions. [2019-01-11 11:20:45,083 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 313 transitions. Word has length 4 [2019-01-11 11:20:45,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 11:20:45,083 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 313 transitions. [2019-01-11 11:20:45,083 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-11 11:20:45,083 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 313 transitions. [2019-01-11 11:20:45,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-11 11:20:45,084 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 11:20:45,084 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-11 11:20:45,085 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-11 11:20:45,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 11:20:45,085 INFO L82 PathProgramCache]: Analyzing trace with hash 945500, now seen corresponding path program 1 times [2019-01-11 11:20:45,085 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 11:20:45,086 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 11:20:45,086 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 11:20:45,086 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 11:20:45,086 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 11:20:45,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 11:20:45,401 WARN L181 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 17 [2019-01-11 11:20:45,428 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 11:20:45,428 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 11:20:45,428 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 11:20:45,428 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-11 11:20:45,429 INFO L207 CegarAbsIntRunner]: [0], [22], [26], [31] [2019-01-11 11:20:45,432 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-11 11:20:45,432 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-11 11:20:45,435 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-11 11:20:45,435 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 88 root evaluator evaluations with a maximum evaluation depth of 3. Performed 88 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-11 11:20:45,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 11:20:45,436 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-11 11:20:45,436 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 11:20:45,436 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-11 11:20:45,450 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 11:20:45,450 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-11 11:20:45,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 11:20:45,457 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 11:20:45,547 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 27 [2019-01-11 11:20:45,551 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:20:45,552 INFO L478 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2019-01-11 11:20:45,589 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:20:45,590 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:20:45,591 INFO L478 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 29 treesize of output 43 [2019-01-11 11:20:45,595 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:20:45,596 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:20:45,598 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:20:45,599 INFO L478 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2019-01-11 11:20:45,603 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:20:45,604 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:20:45,606 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:20:45,607 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:20:45,608 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 75 [2019-01-11 11:20:45,613 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:20:45,614 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:20:45,616 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:20:45,617 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:20:45,619 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:20:45,620 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 97 [2019-01-11 11:20:45,626 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:20:45,627 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:20:45,628 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:20:45,629 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:20:45,630 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:20:45,631 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:20:45,632 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 120 [2019-01-11 11:20:45,633 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-11 11:20:45,701 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:20:45,735 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:20:45,762 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:20:45,784 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:20:45,803 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:20:45,821 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:20:45,865 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:20:45,866 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:20:45,867 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 46 [2019-01-11 11:20:45,893 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:20:45,894 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:20:45,896 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:20:45,896 INFO L478 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 0 case distinctions, treesize of input 33 treesize of output 48 [2019-01-11 11:20:45,900 INFO L478 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 0 case distinctions, treesize of input 36 treesize of output 45 [2019-01-11 11:20:45,903 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:20:45,904 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:20:45,906 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:20:45,906 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 59 [2019-01-11 11:20:45,958 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:20:45,959 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:20:45,960 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:20:45,961 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:20:45,962 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:20:45,963 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2019-01-11 11:20:45,964 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-11 11:20:45,967 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:20:45,969 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:20:45,971 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:20:45,973 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:20:46,003 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-11 11:20:46,004 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 6 variables, input treesize:82, output treesize:54 [2019-01-11 11:20:46,051 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:20:46,052 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:20:46,053 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:20:46,054 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:20:46,054 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:20:46,056 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:20:46,057 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:20:46,058 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:20:46,059 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:20:46,061 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:20:46,062 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:20:46,063 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:20:46,064 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:20:46,065 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:20:46,067 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:20:46,068 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:20:46,069 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:20:46,070 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:20:46,072 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:20:46,073 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:20:46,074 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:20:46,075 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:20:46,077 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 126 [2019-01-11 11:20:46,078 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 11:20:46,166 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-11 11:20:46,166 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:64, output treesize:54 [2019-01-11 11:20:46,207 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:20:46,208 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:20:46,210 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:20:46,211 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:20:46,212 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:20:46,213 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:20:46,215 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:20:46,216 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:20:46,217 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:20:46,218 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:20:46,219 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:20:46,221 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:20:46,222 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:20:46,223 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:20:46,224 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:20:46,226 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:20:46,227 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:20:46,228 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:20:46,229 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:20:46,231 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:20:46,232 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:20:46,233 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:20:46,234 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:20:46,235 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:20:46,236 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 24 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 140 [2019-01-11 11:20:46,237 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 11:20:46,353 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-11 11:20:46,354 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:64, output treesize:54 [2019-01-11 11:20:48,750 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 11:20:48,751 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 11:20:48,772 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 11:20:48,791 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-11 11:20:48,791 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-11 11:20:48,791 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-11 11:20:48,791 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-11 11:20:48,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-11 11:20:48,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2019-01-11 11:20:48,792 INFO L87 Difference]: Start difference. First operand 59 states and 313 transitions. Second operand 8 states. [2019-01-11 11:21:16,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 11:21:16,291 INFO L93 Difference]: Finished difference Result 100 states and 381 transitions. [2019-01-11 11:21:16,291 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-11 11:21:16,292 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-11 11:21:16,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 11:21:16,293 INFO L225 Difference]: With dead ends: 100 [2019-01-11 11:21:16,293 INFO L226 Difference]: Without dead ends: 98 [2019-01-11 11:21:16,294 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2019-01-11 11:21:16,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2019-01-11 11:21:16,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 65. [2019-01-11 11:21:16,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2019-01-11 11:21:16,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 342 transitions. [2019-01-11 11:21:16,306 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 342 transitions. Word has length 4 [2019-01-11 11:21:16,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 11:21:16,307 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 342 transitions. [2019-01-11 11:21:16,307 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-11 11:21:16,307 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 342 transitions. [2019-01-11 11:21:16,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-11 11:21:16,307 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 11:21:16,307 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-11 11:21:16,308 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-11 11:21:16,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 11:21:16,308 INFO L82 PathProgramCache]: Analyzing trace with hash 933968, now seen corresponding path program 1 times [2019-01-11 11:21:16,308 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 11:21:16,309 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 11:21:16,309 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 11:21:16,309 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 11:21:16,309 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 11:21:16,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 11:21:16,427 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 11:21:16,427 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 11:21:16,427 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 11:21:16,427 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-11 11:21:16,427 INFO L207 CegarAbsIntRunner]: [0], [10], [26], [31] [2019-01-11 11:21:16,431 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-11 11:21:16,432 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-11 11:21:16,435 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-11 11:21:16,435 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 88 root evaluator evaluations with a maximum evaluation depth of 3. Performed 88 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-11 11:21:16,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 11:21:16,437 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-11 11:21:16,437 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 11:21:16,437 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-11 11:21:16,445 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 11:21:16,445 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-11 11:21:16,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 11:21:16,453 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 11:21:16,525 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 27 [2019-01-11 11:21:16,567 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:21:16,568 INFO L478 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2019-01-11 11:21:16,603 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:21:16,608 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:21:16,609 INFO L478 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 29 treesize of output 43 [2019-01-11 11:21:16,612 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:21:16,613 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:21:16,614 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:21:16,615 INFO L478 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2019-01-11 11:21:16,620 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:21:16,621 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:21:16,622 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:21:16,625 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:21:16,626 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 75 [2019-01-11 11:21:16,631 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:21:16,632 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:21:16,633 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:21:16,635 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:21:16,636 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:21:16,637 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 97 [2019-01-11 11:21:16,641 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:21:16,642 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:21:16,643 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:21:16,645 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:21:16,646 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:21:16,647 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:21:16,648 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 120 [2019-01-11 11:21:16,649 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-11 11:21:16,707 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:21:16,741 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:21:16,766 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:21:16,784 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:21:16,801 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:21:16,816 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:21:16,850 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 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 5 treesize of output 1 [2019-01-11 11:21:16,851 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-01-11 11:21:16,879 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-11 11:21:16,880 INFO L202 ElimStorePlain]: Needed 9 recursive calls to eliminate 6 variables, input treesize:51, output treesize:54 [2019-01-11 11:21:16,909 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:21:16,910 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:21:16,911 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:21:16,912 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:21:16,912 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:21:16,914 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:21:16,915 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:21:16,916 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:21:16,917 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:21:16,918 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:21:16,920 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:21:16,921 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:21:16,922 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:21:16,923 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:21:16,925 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:21:16,926 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:21:16,927 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:21:16,928 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:21:16,930 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:21:16,931 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:21:16,932 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:21:16,933 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:21:16,934 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 126 [2019-01-11 11:21:16,935 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 11:21:17,024 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-11 11:21:17,025 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:64, output treesize:54 [2019-01-11 11:21:17,077 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:21:17,077 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:21:17,078 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:21:17,079 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:21:17,080 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:21:17,081 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:21:17,082 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:21:17,083 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:21:17,084 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:21:17,086 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:21:17,087 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:21:17,088 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:21:17,089 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:21:17,090 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:21:17,092 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:21:17,093 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:21:17,094 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:21:17,095 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:21:17,097 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:21:17,098 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:21:17,099 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:21:17,100 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:21:17,101 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:21:17,102 INFO L683 Elim1Store]: detected equality via solver [2019-01-11 11:21:17,103 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 141 [2019-01-11 11:21:17,104 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 11:21:17,202 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-11 11:21:17,202 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:66, output treesize:56 [2019-01-11 11:21:19,614 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 11:21:19,614 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 11:21:19,637 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 11:21:19,657 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-11 11:21:19,657 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-11 11:21:19,657 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-11 11:21:19,657 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-11 11:21:19,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-11 11:21:19,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2019-01-11 11:21:19,658 INFO L87 Difference]: Start difference. First operand 65 states and 342 transitions. Second operand 8 states. [2019-01-11 11:21:46,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 11:21:46,981 INFO L93 Difference]: Finished difference Result 101 states and 390 transitions. [2019-01-11 11:21:46,982 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-11 11:21:46,982 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-11 11:21:46,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 11:21:46,984 INFO L225 Difference]: With dead ends: 101 [2019-01-11 11:21:46,984 INFO L226 Difference]: Without dead ends: 99 [2019-01-11 11:21:46,985 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2019-01-11 11:21:46,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2019-01-11 11:21:46,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 66. [2019-01-11 11:21:46,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-01-11 11:21:46,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 350 transitions. [2019-01-11 11:21:46,994 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 350 transitions. Word has length 4 [2019-01-11 11:21:46,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 11:21:46,994 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 350 transitions. [2019-01-11 11:21:46,994 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-11 11:21:46,994 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 350 transitions. [2019-01-11 11:21:46,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-11 11:21:46,995 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 11:21:46,995 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-11 11:21:46,995 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-11 11:21:46,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 11:21:46,996 INFO L82 PathProgramCache]: Analyzing trace with hash 934030, now seen corresponding path program 1 times [2019-01-11 11:21:46,996 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 11:21:46,996 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 11:21:46,997 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 11:21:46,997 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 11:21:46,997 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 11:21:47,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 11:21:47,085 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 11:21:47,085 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 11:21:47,085 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 11:21:47,085 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-11 11:21:47,085 INFO L207 CegarAbsIntRunner]: [0], [10], [28], [31] [2019-01-11 11:21:47,086 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-11 11:21:47,086 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-11 11:21:47,089 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-11 11:21:47,089 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 88 root evaluator evaluations with a maximum evaluation depth of 3. Performed 88 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-11 11:21:47,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 11:21:47,090 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-11 11:21:47,090 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 11:21:47,090 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-11 11:21:47,099 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 11:21:47,099 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-11 11:21:47,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 11:21:47,106 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 11:21:47,169 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:21:47,171 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:21:47,171 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 46 [2019-01-11 11:21:47,200 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:21:47,202 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:21:47,203 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:21:47,204 INFO L478 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 0 case distinctions, treesize of input 33 treesize of output 48 [2019-01-11 11:21:47,208 INFO L478 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 0 case distinctions, treesize of input 36 treesize of output 45 [2019-01-11 11:21:47,211 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:21:47,212 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:21:47,213 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:21:47,214 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 59 [2019-01-11 11:21:47,277 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:21:47,278 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:21:47,280 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:21:47,281 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:21:47,282 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:21:47,283 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2019-01-11 11:21:47,284 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2019-01-11 11:21:47,286 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:21:47,288 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:21:47,290 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:21:47,292 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:21:47,313 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 27 [2019-01-11 11:21:47,336 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:21:47,337 INFO L478 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2019-01-11 11:21:47,339 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:21:47,340 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:21:47,340 INFO L478 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 29 treesize of output 43 [2019-01-11 11:21:47,346 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:21:47,347 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:21:47,349 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:21:47,350 INFO L478 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2019-01-11 11:21:47,352 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:21:47,353 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:21:47,354 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:21:47,355 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:21:47,356 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 75 [2019-01-11 11:21:47,361 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:21:47,362 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:21:47,363 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:21:47,364 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:21:47,366 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:21:47,367 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 97 [2019-01-11 11:21:47,393 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:21:47,393 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:21:47,394 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:21:47,395 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:21:47,396 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:21:47,397 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:21:47,399 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 120 [2019-01-11 11:21:47,400 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-11 11:21:47,476 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:21:47,509 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:21:47,684 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:21:47,702 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:21:47,722 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:21:47,737 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:21:47,767 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-11 11:21:47,767 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 6 variables, input treesize:82, output treesize:54 [2019-01-11 11:21:47,790 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:21:47,791 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:21:47,792 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:21:47,793 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:21:47,795 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:21:47,796 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:21:47,797 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:21:47,799 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:21:47,800 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:21:47,802 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:21:47,803 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:21:47,804 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:21:47,806 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:21:47,807 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:21:47,809 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:21:47,810 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:21:47,811 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:21:47,813 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:21:47,814 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:21:47,816 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:21:47,817 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:21:47,818 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:21:47,819 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 126 [2019-01-11 11:21:47,820 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 11:21:47,910 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-11 11:21:47,910 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:64, output treesize:54 [2019-01-11 11:21:48,132 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:21:48,133 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:21:48,134 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:21:48,134 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:21:48,136 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:21:48,137 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:21:48,139 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:21:48,140 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:21:48,141 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:21:48,143 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:21:48,144 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:21:48,146 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:21:48,147 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:21:48,149 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:21:48,150 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:21:48,151 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:21:48,153 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:21:48,154 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:21:48,156 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:21:48,157 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:21:48,159 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:21:48,160 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:21:48,161 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:21:48,162 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:21:48,164 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 24 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 142 [2019-01-11 11:21:48,164 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 11:21:48,259 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-11 11:21:48,260 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:66, output treesize:56 [2019-01-11 11:21:50,661 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 11:21:50,661 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 11:21:50,682 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 11:21:50,701 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-11 11:21:50,702 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-11 11:21:50,702 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-11 11:21:50,702 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-11 11:21:50,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-11 11:21:50,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2019-01-11 11:21:50,703 INFO L87 Difference]: Start difference. First operand 66 states and 350 transitions. Second operand 8 states. [2019-01-11 11:22:12,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 11:22:12,645 INFO L93 Difference]: Finished difference Result 105 states and 409 transitions. [2019-01-11 11:22:12,647 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-11 11:22:12,648 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-11 11:22:12,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 11:22:12,649 INFO L225 Difference]: With dead ends: 105 [2019-01-11 11:22:12,649 INFO L226 Difference]: Without dead ends: 101 [2019-01-11 11:22:12,650 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2019-01-11 11:22:12,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2019-01-11 11:22:12,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 72. [2019-01-11 11:22:12,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2019-01-11 11:22:12,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 372 transitions. [2019-01-11 11:22:12,661 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 372 transitions. Word has length 4 [2019-01-11 11:22:12,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 11:22:12,661 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 372 transitions. [2019-01-11 11:22:12,661 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-11 11:22:12,662 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 372 transitions. [2019-01-11 11:22:12,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-11 11:22:12,662 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 11:22:12,662 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-11 11:22:12,663 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-11 11:22:12,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 11:22:12,663 INFO L82 PathProgramCache]: Analyzing trace with hash 933596, now seen corresponding path program 1 times [2019-01-11 11:22:12,663 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 11:22:12,664 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 11:22:12,664 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 11:22:12,664 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 11:22:12,664 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 11:22:12,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 11:22:12,758 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 11:22:12,758 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 11:22:12,758 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 11:22:12,758 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-11 11:22:12,759 INFO L207 CegarAbsIntRunner]: [0], [10], [14], [31] [2019-01-11 11:22:12,759 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-11 11:22:12,760 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-11 11:22:12,762 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-11 11:22:12,762 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 88 root evaluator evaluations with a maximum evaluation depth of 3. Performed 88 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-11 11:22:12,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 11:22:12,763 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-11 11:22:12,763 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 11:22:12,763 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-11 11:22:12,771 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 11:22:12,771 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-11 11:22:12,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 11:22:12,778 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 11:22:12,874 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 27 [2019-01-11 11:22:12,881 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:22:12,881 INFO L478 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2019-01-11 11:22:12,885 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:22:12,886 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:22:12,887 INFO L478 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 29 treesize of output 43 [2019-01-11 11:22:12,893 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:22:12,895 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:22:12,897 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:22:12,898 INFO L478 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2019-01-11 11:22:12,903 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:22:12,904 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:22:12,906 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:22:12,907 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:22:12,908 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 75 [2019-01-11 11:22:12,912 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:22:12,914 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:22:12,915 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:22:12,917 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:22:12,918 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:22:12,919 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 97 [2019-01-11 11:22:12,925 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:22:12,926 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:22:12,926 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:22:12,927 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:22:12,929 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:22:12,930 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:22:12,931 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 120 [2019-01-11 11:22:12,932 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-11 11:22:12,991 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:22:13,025 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:22:13,051 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:22:13,070 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:22:13,088 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:22:13,104 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:22:13,151 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:22:13,152 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:22:13,153 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 46 [2019-01-11 11:22:13,179 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:22:13,181 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:22:13,182 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:22:13,183 INFO L478 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 0 case distinctions, treesize of input 33 treesize of output 48 [2019-01-11 11:22:13,186 INFO L478 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 0 case distinctions, treesize of input 36 treesize of output 45 [2019-01-11 11:22:13,189 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:22:13,190 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:22:13,190 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:22:13,191 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 59 [2019-01-11 11:22:13,241 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:22:13,242 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:22:13,243 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:22:13,244 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:22:13,245 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:22:13,246 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2019-01-11 11:22:13,247 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-11 11:22:13,249 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:22:13,250 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:22:13,251 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:22:13,254 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:22:13,284 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-11 11:22:13,284 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 6 variables, input treesize:82, output treesize:54 [2019-01-11 11:22:13,308 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:22:13,309 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:22:13,309 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:22:13,310 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:22:13,311 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:22:13,312 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:22:13,313 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:22:13,314 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:22:13,316 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:22:13,317 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:22:13,318 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:22:13,319 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:22:13,320 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:22:13,322 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:22:13,323 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:22:13,324 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:22:13,325 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:22:13,327 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:22:13,328 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:22:13,329 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:22:13,330 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:22:13,331 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:22:13,333 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 126 [2019-01-11 11:22:13,333 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 11:22:13,425 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-11 11:22:13,425 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:64, output treesize:54 [2019-01-11 11:22:13,450 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:22:13,451 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:22:13,453 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:22:13,454 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:22:13,456 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:22:13,457 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:22:13,458 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:22:13,460 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:22:13,461 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:22:13,463 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:22:13,464 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:22:13,466 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:22:13,467 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:22:13,468 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:22:13,470 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:22:13,471 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:22:13,473 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:22:13,474 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:22:13,475 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:22:13,477 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:22:13,478 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:22:13,480 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:22:13,481 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:22:13,482 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:22:13,483 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 24 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 142 [2019-01-11 11:22:13,484 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 11:22:13,583 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-11 11:22:13,584 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:66, output treesize:56 [2019-01-11 11:22:15,996 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 11:22:15,996 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 11:22:16,019 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 11:22:16,037 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-11 11:22:16,037 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-11 11:22:16,037 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-11 11:22:16,038 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-11 11:22:16,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-11 11:22:16,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2019-01-11 11:22:16,038 INFO L87 Difference]: Start difference. First operand 72 states and 372 transitions. Second operand 8 states. [2019-01-11 11:22:35,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 11:22:35,554 INFO L93 Difference]: Finished difference Result 104 states and 422 transitions. [2019-01-11 11:22:35,554 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-11 11:22:35,555 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-11 11:22:35,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 11:22:35,556 INFO L225 Difference]: With dead ends: 104 [2019-01-11 11:22:35,556 INFO L226 Difference]: Without dead ends: 102 [2019-01-11 11:22:35,557 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2019-01-11 11:22:35,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2019-01-11 11:22:35,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 74. [2019-01-11 11:22:35,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2019-01-11 11:22:35,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 387 transitions. [2019-01-11 11:22:35,569 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 387 transitions. Word has length 4 [2019-01-11 11:22:35,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 11:22:35,569 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 387 transitions. [2019-01-11 11:22:35,569 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-11 11:22:35,570 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 387 transitions. [2019-01-11 11:22:35,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-11 11:22:35,570 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 11:22:35,570 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-11 11:22:35,570 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-11 11:22:35,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 11:22:35,571 INFO L82 PathProgramCache]: Analyzing trace with hash 949406, now seen corresponding path program 1 times [2019-01-11 11:22:35,571 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 11:22:35,571 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 11:22:35,571 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 11:22:35,571 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 11:22:35,572 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 11:22:35,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 11:22:35,788 WARN L181 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 17 [2019-01-11 11:22:35,811 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 11:22:35,811 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 11:22:35,811 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 11:22:35,812 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-11 11:22:35,812 INFO L207 CegarAbsIntRunner]: [0], [26], [28], [31] [2019-01-11 11:22:35,813 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-11 11:22:35,813 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-11 11:22:35,815 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-11 11:22:35,815 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 88 root evaluator evaluations with a maximum evaluation depth of 3. Performed 88 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-11 11:22:35,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 11:22:35,816 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-11 11:22:35,816 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 11:22:35,816 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-11 11:22:35,825 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 11:22:35,825 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-11 11:22:35,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 11:22:35,832 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 11:22:35,925 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:22:35,927 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:22:35,928 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 46 [2019-01-11 11:22:35,957 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:22:35,959 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:22:35,961 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:22:35,962 INFO L478 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 0 case distinctions, treesize of input 33 treesize of output 48 [2019-01-11 11:22:35,965 INFO L478 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 0 case distinctions, treesize of input 36 treesize of output 45 [2019-01-11 11:22:35,970 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:22:35,972 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:22:35,975 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:22:35,975 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 59 [2019-01-11 11:22:36,046 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:22:36,049 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:22:36,051 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:22:36,053 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:22:36,055 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:22:36,056 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2019-01-11 11:22:36,056 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2019-01-11 11:22:36,058 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:22:36,059 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:22:36,060 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:22:36,064 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:22:36,097 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 27 [2019-01-11 11:22:36,101 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:22:36,101 INFO L478 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2019-01-11 11:22:36,106 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:22:36,107 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:22:36,108 INFO L478 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 29 treesize of output 43 [2019-01-11 11:22:36,110 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:22:36,111 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:22:36,112 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:22:36,112 INFO L478 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2019-01-11 11:22:36,116 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:22:36,118 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:22:36,120 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:22:36,122 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:22:36,123 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 75 [2019-01-11 11:22:36,129 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:22:36,130 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:22:36,130 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:22:36,131 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:22:36,132 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:22:36,133 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 97 [2019-01-11 11:22:36,139 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:22:36,140 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:22:36,141 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:22:36,143 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:22:36,144 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:22:36,146 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:22:36,147 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 120 [2019-01-11 11:22:36,148 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-11 11:22:36,210 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:22:36,244 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:22:36,270 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:22:36,290 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:22:36,305 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:22:36,320 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:22:36,350 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-11 11:22:36,350 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 6 variables, input treesize:82, output treesize:54 [2019-01-11 11:22:36,371 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:22:36,372 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:22:36,373 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:22:36,374 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:22:36,375 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:22:36,376 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:22:36,378 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:22:36,379 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:22:36,381 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:22:36,382 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:22:36,383 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:22:36,385 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:22:36,386 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:22:36,388 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:22:36,389 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:22:36,390 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:22:36,392 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:22:36,393 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:22:36,395 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:22:36,396 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:22:36,398 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:22:36,399 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:22:36,400 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 126 [2019-01-11 11:22:36,401 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 11:22:36,488 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-11 11:22:36,488 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:64, output treesize:54 [2019-01-11 11:22:36,668 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:22:36,669 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:22:36,669 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:22:36,670 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:22:36,672 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:22:36,673 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:22:36,675 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:22:36,676 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:22:36,677 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:22:36,679 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:22:36,680 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:22:36,682 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:22:36,683 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:22:36,685 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:22:36,686 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:22:36,687 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:22:36,689 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:22:36,690 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:22:36,692 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:22:36,693 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:22:36,695 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:22:36,696 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:22:36,697 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:22:36,699 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:22:36,700 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 24 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 142 [2019-01-11 11:22:36,700 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 11:22:36,795 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-11 11:22:36,796 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:66, output treesize:56 [2019-01-11 11:22:39,198 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 11:22:39,198 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 11:22:39,221 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 11:22:39,240 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-11 11:22:39,241 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-11 11:22:39,241 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-11 11:22:39,241 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-11 11:22:39,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-11 11:22:39,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2019-01-11 11:22:39,241 INFO L87 Difference]: Start difference. First operand 74 states and 387 transitions. Second operand 8 states. [2019-01-11 11:23:08,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 11:23:08,896 INFO L93 Difference]: Finished difference Result 114 states and 447 transitions. [2019-01-11 11:23:08,897 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-11 11:23:08,897 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-11 11:23:08,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 11:23:08,899 INFO L225 Difference]: With dead ends: 114 [2019-01-11 11:23:08,899 INFO L226 Difference]: Without dead ends: 111 [2019-01-11 11:23:08,900 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2019-01-11 11:23:08,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2019-01-11 11:23:08,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 81. [2019-01-11 11:23:08,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2019-01-11 11:23:08,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 411 transitions. [2019-01-11 11:23:08,914 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 411 transitions. Word has length 4 [2019-01-11 11:23:08,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 11:23:08,914 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 411 transitions. [2019-01-11 11:23:08,914 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-11 11:23:08,914 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 411 transitions. [2019-01-11 11:23:08,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-11 11:23:08,915 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 11:23:08,915 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-11 11:23:08,915 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-11 11:23:08,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 11:23:08,915 INFO L82 PathProgramCache]: Analyzing trace with hash 948972, now seen corresponding path program 1 times [2019-01-11 11:23:08,915 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 11:23:08,916 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 11:23:08,916 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 11:23:08,916 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 11:23:08,916 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 11:23:08,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 11:23:09,106 WARN L181 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 17 [2019-01-11 11:23:09,130 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 11:23:09,130 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 11:23:09,130 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 11:23:09,130 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-11 11:23:09,130 INFO L207 CegarAbsIntRunner]: [0], [14], [26], [31] [2019-01-11 11:23:09,131 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-11 11:23:09,131 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-11 11:23:09,134 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-11 11:23:09,134 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 88 root evaluator evaluations with a maximum evaluation depth of 3. Performed 88 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-11 11:23:09,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 11:23:09,135 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-11 11:23:09,135 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 11:23:09,135 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-11 11:23:09,148 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 11:23:09,148 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-11 11:23:09,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 11:23:09,160 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 11:23:09,252 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 27 [2019-01-11 11:23:09,255 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:09,256 INFO L478 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2019-01-11 11:23:09,260 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:09,262 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:09,263 INFO L478 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 29 treesize of output 43 [2019-01-11 11:23:09,267 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:09,269 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:09,271 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:09,271 INFO L478 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2019-01-11 11:23:09,277 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:09,277 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:09,278 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:09,279 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:09,280 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 75 [2019-01-11 11:23:09,286 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:09,288 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:09,289 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:09,291 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:09,293 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:09,294 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 97 [2019-01-11 11:23:09,299 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:09,300 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:09,302 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:09,303 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:09,304 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:09,306 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:09,307 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 120 [2019-01-11 11:23:09,308 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-11 11:23:09,369 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:23:09,406 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:23:09,437 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:23:09,457 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:23:09,475 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:23:09,492 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:23:09,537 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:09,539 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:09,539 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 46 [2019-01-11 11:23:09,566 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:09,567 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:09,568 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:09,569 INFO L478 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 0 case distinctions, treesize of input 33 treesize of output 48 [2019-01-11 11:23:09,588 INFO L478 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 0 case distinctions, treesize of input 36 treesize of output 45 [2019-01-11 11:23:09,594 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:09,595 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:09,596 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:09,596 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 59 [2019-01-11 11:23:09,647 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:09,648 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:09,649 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:09,651 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:09,652 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:09,653 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2019-01-11 11:23:09,653 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-11 11:23:09,656 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:23:09,657 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:23:09,658 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:23:09,661 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:23:09,690 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-11 11:23:09,690 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 6 variables, input treesize:82, output treesize:54 [2019-01-11 11:23:09,716 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:09,717 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:09,718 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:09,719 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:09,721 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:09,722 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:09,736 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:09,737 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:09,738 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:09,739 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:09,741 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:09,742 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:09,743 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:09,745 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:09,746 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:09,748 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:09,749 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:09,750 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:09,757 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:09,757 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:09,758 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:09,759 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:09,760 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 126 [2019-01-11 11:23:09,761 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 11:23:09,846 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-11 11:23:09,846 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:64, output treesize:54 [2019-01-11 11:23:09,889 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:09,890 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:09,891 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:09,893 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:09,894 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:09,895 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:09,896 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:09,898 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:09,899 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:09,900 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:09,901 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:09,902 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:09,904 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:09,905 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:09,906 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:09,907 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:09,909 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:09,910 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:09,911 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:09,912 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:09,913 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:09,915 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:09,916 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:09,917 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:09,918 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 24 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 142 [2019-01-11 11:23:09,919 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 11:23:10,013 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-11 11:23:10,014 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:66, output treesize:56 [2019-01-11 11:23:12,398 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 11:23:12,399 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 11:23:12,425 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 11:23:12,444 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-11 11:23:12,444 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-11 11:23:12,444 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-11 11:23:12,444 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-11 11:23:12,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-11 11:23:12,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2019-01-11 11:23:12,445 INFO L87 Difference]: Start difference. First operand 81 states and 411 transitions. Second operand 8 states. [2019-01-11 11:23:37,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 11:23:37,605 INFO L93 Difference]: Finished difference Result 114 states and 461 transitions. [2019-01-11 11:23:37,605 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-11 11:23:37,606 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-11 11:23:37,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 11:23:37,607 INFO L225 Difference]: With dead ends: 114 [2019-01-11 11:23:37,607 INFO L226 Difference]: Without dead ends: 112 [2019-01-11 11:23:37,607 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2019-01-11 11:23:37,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2019-01-11 11:23:37,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 83. [2019-01-11 11:23:37,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-01-11 11:23:37,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 426 transitions. [2019-01-11 11:23:37,623 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 426 transitions. Word has length 4 [2019-01-11 11:23:37,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 11:23:37,623 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 426 transitions. [2019-01-11 11:23:37,623 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-11 11:23:37,623 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 426 transitions. [2019-01-11 11:23:37,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-11 11:23:37,624 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 11:23:37,624 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-11 11:23:37,624 INFO L423 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-11 11:23:37,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 11:23:37,625 INFO L82 PathProgramCache]: Analyzing trace with hash 951454, now seen corresponding path program 1 times [2019-01-11 11:23:37,625 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 11:23:37,625 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 11:23:37,625 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 11:23:37,626 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 11:23:37,626 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 11:23:37,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 11:23:37,783 WARN L181 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 13 [2019-01-11 11:23:37,787 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 11:23:37,787 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 11:23:37,787 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 11:23:37,787 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-11 11:23:37,788 INFO L207 CegarAbsIntRunner]: [0], [28], [32], [33] [2019-01-11 11:23:37,789 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-11 11:23:37,789 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-11 11:23:37,792 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-11 11:23:37,792 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 88 root evaluator evaluations with a maximum evaluation depth of 3. Performed 88 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2019-01-11 11:23:37,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 11:23:37,793 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-11 11:23:37,793 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 11:23:37,793 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-11 11:23:37,803 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 11:23:37,804 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-11 11:23:37,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 11:23:37,810 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 11:23:37,845 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 27 [2019-01-11 11:23:37,848 INFO L478 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2019-01-11 11:23:37,854 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:37,855 INFO L478 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 39 [2019-01-11 11:23:37,859 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:37,861 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:37,862 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:37,863 INFO L478 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 0 case distinctions, treesize of input 31 treesize of output 53 [2019-01-11 11:23:37,868 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:37,875 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:37,878 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:37,879 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 8 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 67 [2019-01-11 11:23:37,883 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:37,885 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:37,887 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:37,889 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:37,890 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:37,891 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 89 [2019-01-11 11:23:37,896 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:37,899 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:37,901 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:37,906 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:37,908 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:37,909 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 108 [2019-01-11 11:23:37,909 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-11 11:23:37,958 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:23:37,987 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:23:38,008 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:23:38,027 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:23:38,044 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:23:38,060 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:23:38,104 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:38,105 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 49 [2019-01-11 11:23:38,108 INFO L478 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 37 [2019-01-11 11:23:38,123 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:38,124 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:38,127 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:38,128 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:38,128 INFO L478 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 58 [2019-01-11 11:23:38,133 INFO L478 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 0 case distinctions, treesize of input 38 treesize of output 49 [2019-01-11 11:23:38,158 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:38,159 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:38,160 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:38,161 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:38,163 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:38,164 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 37 [2019-01-11 11:23:38,165 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-11 11:23:38,180 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:23:38,190 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:23:38,197 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:23:38,204 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:23:38,237 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-11 11:23:38,237 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 7 variables, input treesize:82, output treesize:63 [2019-01-11 11:23:38,255 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:38,256 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:38,258 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:38,259 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:38,260 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:38,262 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:38,263 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:38,266 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:38,267 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:38,268 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:38,270 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:38,271 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:38,274 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:38,275 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:38,279 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:38,281 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:38,290 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 19 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 118 [2019-01-11 11:23:38,291 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-01-11 11:23:38,481 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 11 dim-0 vars, and 2 xjuncts. [2019-01-11 11:23:38,482 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:73, output treesize:114 [2019-01-11 11:23:39,791 WARN L181 SmtUtils]: Spent 341.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 38 [2019-01-11 11:23:39,794 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 11:23:39,794 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 11:23:39,822 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 11:23:39,840 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-11 11:23:39,840 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-01-11 11:23:39,840 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-11 11:23:39,840 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-01-11 11:23:39,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-01-11 11:23:39,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-01-11 11:23:39,841 INFO L87 Difference]: Start difference. First operand 83 states and 426 transitions. Second operand 6 states. [2019-01-11 11:23:42,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 11:23:42,133 INFO L93 Difference]: Finished difference Result 107 states and 456 transitions. [2019-01-11 11:23:42,133 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-01-11 11:23:42,133 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 4 [2019-01-11 11:23:42,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 11:23:42,134 INFO L225 Difference]: With dead ends: 107 [2019-01-11 11:23:42,134 INFO L226 Difference]: Without dead ends: 106 [2019-01-11 11:23:42,135 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2019-01-11 11:23:42,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2019-01-11 11:23:42,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 83. [2019-01-11 11:23:42,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-01-11 11:23:42,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 426 transitions. [2019-01-11 11:23:42,147 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 426 transitions. Word has length 4 [2019-01-11 11:23:42,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 11:23:42,147 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 426 transitions. [2019-01-11 11:23:42,147 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-01-11 11:23:42,148 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 426 transitions. [2019-01-11 11:23:42,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-11 11:23:42,148 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 11:23:42,148 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-11 11:23:42,148 INFO L423 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-11 11:23:42,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 11:23:42,149 INFO L82 PathProgramCache]: Analyzing trace with hash 938000, now seen corresponding path program 1 times [2019-01-11 11:23:42,149 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 11:23:42,149 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 11:23:42,150 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 11:23:42,150 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 11:23:42,150 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 11:23:42,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 11:23:42,282 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 11:23:42,282 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 11:23:42,282 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 11:23:42,282 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-11 11:23:42,282 INFO L207 CegarAbsIntRunner]: [0], [14], [32], [33] [2019-01-11 11:23:42,283 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-11 11:23:42,283 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-11 11:23:42,285 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-11 11:23:42,285 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 88 root evaluator evaluations with a maximum evaluation depth of 3. Performed 88 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2019-01-11 11:23:42,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 11:23:42,286 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-11 11:23:42,286 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 11:23:42,286 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-11 11:23:42,294 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 11:23:42,294 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-11 11:23:42,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 11:23:42,300 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 11:23:42,333 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 27 [2019-01-11 11:23:42,337 INFO L478 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2019-01-11 11:23:42,341 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:42,342 INFO L478 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 39 [2019-01-11 11:23:42,346 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:42,348 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:42,349 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:42,350 INFO L478 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 0 case distinctions, treesize of input 31 treesize of output 53 [2019-01-11 11:23:42,354 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:42,358 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:42,359 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:42,360 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 8 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 67 [2019-01-11 11:23:42,365 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:42,367 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:42,369 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:42,371 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:42,372 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:42,373 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 89 [2019-01-11 11:23:42,379 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:42,382 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:42,383 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:42,389 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:42,390 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:42,391 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 108 [2019-01-11 11:23:42,392 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-11 11:23:42,447 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:23:42,477 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:23:42,499 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:23:42,520 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:23:42,537 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:23:42,553 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:23:42,602 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:42,603 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 49 [2019-01-11 11:23:42,606 INFO L478 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 37 [2019-01-11 11:23:42,621 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:42,623 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:42,625 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:42,626 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:42,627 INFO L478 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 58 [2019-01-11 11:23:42,632 INFO L478 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 0 case distinctions, treesize of input 38 treesize of output 49 [2019-01-11 11:23:42,661 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:42,662 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:42,663 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:42,665 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:42,667 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:42,668 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 37 [2019-01-11 11:23:42,668 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-11 11:23:42,682 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:23:42,693 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:23:42,701 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:23:42,707 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:23:42,739 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-11 11:23:42,740 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 7 variables, input treesize:82, output treesize:63 [2019-01-11 11:23:42,760 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:42,761 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:42,762 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:42,763 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:42,765 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:42,766 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:42,768 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:42,771 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:42,772 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:42,774 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:42,775 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:42,777 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:42,780 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:42,781 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:42,786 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:42,787 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:42,797 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 19 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 118 [2019-01-11 11:23:42,799 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-01-11 11:23:42,997 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 11 dim-0 vars, and 2 xjuncts. [2019-01-11 11:23:42,998 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:73, output treesize:122 [2019-01-11 11:23:44,113 WARN L181 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 35 [2019-01-11 11:23:44,115 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 11:23:44,115 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 11:23:44,124 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 11:23:44,141 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-11 11:23:44,142 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-01-11 11:23:44,142 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-11 11:23:44,142 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-01-11 11:23:44,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-01-11 11:23:44,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-01-11 11:23:44,143 INFO L87 Difference]: Start difference. First operand 83 states and 426 transitions. Second operand 6 states. [2019-01-11 11:23:44,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 11:23:44,598 INFO L93 Difference]: Finished difference Result 107 states and 456 transitions. [2019-01-11 11:23:44,598 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-01-11 11:23:44,599 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 4 [2019-01-11 11:23:44,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 11:23:44,600 INFO L225 Difference]: With dead ends: 107 [2019-01-11 11:23:44,600 INFO L226 Difference]: Without dead ends: 106 [2019-01-11 11:23:44,600 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2019-01-11 11:23:44,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2019-01-11 11:23:44,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 83. [2019-01-11 11:23:44,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-01-11 11:23:44,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 426 transitions. [2019-01-11 11:23:44,614 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 426 transitions. Word has length 4 [2019-01-11 11:23:44,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 11:23:44,615 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 426 transitions. [2019-01-11 11:23:44,615 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-01-11 11:23:44,615 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 426 transitions. [2019-01-11 11:23:44,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-11 11:23:44,615 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 11:23:44,616 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-01-11 11:23:44,616 INFO L423 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-11 11:23:44,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 11:23:44,616 INFO L82 PathProgramCache]: Analyzing trace with hash 29172180, now seen corresponding path program 1 times [2019-01-11 11:23:44,616 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 11:23:44,617 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 11:23:44,617 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 11:23:44,617 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 11:23:44,617 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 11:23:44,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 11:23:44,730 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 11:23:44,730 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 11:23:44,731 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 11:23:44,731 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-01-11 11:23:44,731 INFO L207 CegarAbsIntRunner]: [0], [6], [18], [32], [33] [2019-01-11 11:23:44,733 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-11 11:23:44,733 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-11 11:23:44,736 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-11 11:23:44,736 INFO L272 AbstractInterpreter]: Visited 5 different actions 5 times. Never merged. Never widened. Performed 90 root evaluator evaluations with a maximum evaluation depth of 3. Performed 90 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-11 11:23:44,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 11:23:44,737 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-11 11:23:44,737 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 11:23:44,737 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-11 11:23:44,749 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 11:23:44,749 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-11 11:23:44,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 11:23:44,756 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 11:23:44,797 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 27 [2019-01-11 11:23:44,799 INFO L478 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2019-01-11 11:23:44,807 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:44,808 INFO L478 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 39 [2019-01-11 11:23:44,818 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:44,819 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:44,820 INFO L478 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 0 case distinctions, treesize of input 31 treesize of output 49 [2019-01-11 11:23:44,825 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:44,829 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:44,830 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:44,831 INFO L478 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 0 case distinctions, treesize of input 33 treesize of output 63 [2019-01-11 11:23:44,837 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:44,840 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:44,842 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:44,844 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:44,845 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:44,846 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 85 [2019-01-11 11:23:44,852 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:44,855 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:44,856 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:44,860 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:44,862 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:44,862 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 17 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 104 [2019-01-11 11:23:44,863 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-11 11:23:44,935 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:23:44,962 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:23:44,985 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:23:45,003 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:23:45,018 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:23:45,034 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:23:45,076 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:45,077 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 38 [2019-01-11 11:23:45,081 INFO L478 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 29 [2019-01-11 11:23:45,086 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:45,086 INFO L478 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 35 [2019-01-11 11:23:45,092 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:45,093 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:45,094 INFO L478 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 0 case distinctions, treesize of input 27 treesize of output 45 [2019-01-11 11:23:45,117 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:45,120 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:45,121 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:45,122 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:45,125 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:45,126 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 33 [2019-01-11 11:23:45,126 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-11 11:23:45,142 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:23:45,148 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:23:45,153 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:23:45,156 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:23:45,189 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-11 11:23:45,189 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 6 variables, input treesize:68, output treesize:59 [2019-01-11 11:23:45,213 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:45,214 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:45,215 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:45,217 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:45,218 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:45,220 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:45,221 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:45,223 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:45,224 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:45,226 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:45,227 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:45,228 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:45,231 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:45,232 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:45,235 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:45,236 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:45,255 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 18 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 108 [2019-01-11 11:23:45,256 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-01-11 11:23:45,438 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 9 dim-0 vars, and 2 xjuncts. [2019-01-11 11:23:45,439 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:69, output treesize:108 [2019-01-11 11:23:45,642 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:45,643 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:45,644 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:45,646 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:45,647 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:45,648 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:45,650 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:45,651 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:45,652 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:45,654 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:45,655 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:45,657 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:45,658 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:45,659 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:45,661 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:45,662 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:45,662 INFO L683 Elim1Store]: detected equality via solver [2019-01-11 11:23:45,663 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 112 [2019-01-11 11:23:45,664 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 11:23:45,790 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:45,791 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:45,792 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:45,793 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:45,794 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:45,796 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:45,798 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:45,799 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:45,801 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:45,804 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:45,807 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:45,808 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:45,811 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:45,815 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:45,818 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:45,821 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:45,823 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:45,824 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:45,826 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:23:45,852 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 153 [2019-01-11 11:23:45,856 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 8 xjuncts. [2019-01-11 11:23:46,325 INFO L267 ElimStorePlain]: Start of recursive call 1: 11 dim-0 vars, 2 dim-1 vars, End of recursive call: 26 dim-0 vars, and 5 xjuncts. [2019-01-11 11:23:46,325 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 13 variables, input treesize:130, output treesize:244 [2019-01-11 11:23:59,341 WARN L521 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-11 11:23:59,342 FATAL L265 ToolchainWalker]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:8192 -smt2 -in -t:2000)Received EOF on stdin. No stderr output. at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:208) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseSuccess(Executor.java:221) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.push(Scriptor.java:133) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.arrays.DiffWrapperScript.push(DiffWrapperScript.java:93) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.WrapperScript.push(WrapperScript.java:101) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.UndoableWrapperScript.push(UndoableWrapperScript.java:52) at de.uni_freiburg.informatik.ultimate.logic.Util.checkSat(Util.java:48) at de.uni_freiburg.informatik.ultimate.logic.simplification.SimplifyDDA.getRedundancy(SimplifyDDA.java:621) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.SimplifyDDAWithTimeout.getRedundancy(SimplifyDDAWithTimeout.java:122) at de.uni_freiburg.informatik.ultimate.logic.simplification.SimplifyDDA$Simplifier.walk(SimplifyDDA.java:371) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:122) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:113) at de.uni_freiburg.informatik.ultimate.logic.simplification.SimplifyDDA.simplifyOnce(SimplifyDDA.java:650) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.SimplifyDDAWithTimeout.getSimplifiedTerm(SimplifyDDAWithTimeout.java:187) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.SmtUtils.simplify(SmtUtils.java:152) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:360) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:305) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheckSpWp$UnifyPostprocessor.postprocess(TraceCheckSpWp.java:575) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:439) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.IterativePredicateTransformer.computeStrongestPostconditionSequence(IterativePredicateTransformer.java:200) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:286) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:162) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceCheckConstructor.constructForwardBackward(TraceCheckConstructor.java:224) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceCheckConstructor.constructTraceCheck(TraceCheckConstructor.java:188) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceCheckConstructor.get(TraceCheckConstructor.java:165) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseTaipanRefinementStrategy.getTraceCheck(BaseTaipanRefinementStrategy.java:215) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseRefinementStrategy.checkFeasibility(BaseRefinementStrategy.java:223) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseRefinementStrategy.executeStrategy(BaseRefinementStrategy.java:197) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:70) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:456) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:434) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:376) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterate(TraceAbstractionStarter.java:334) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:126) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) Caused by: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: EOF at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1427) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:630) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:419) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:205) ... 46 more [2019-01-11 11:23:59,347 INFO L168 Benchmark]: Toolchain (without parser) took 617546.65 ms. Allocated memory was 140.0 MB in the beginning and 194.5 MB in the end (delta: 54.5 MB). Free memory was 107.5 MB in the beginning and 116.6 MB in the end (delta: -9.2 MB). Peak memory consumption was 45.4 MB. Max. memory is 7.1 GB. [2019-01-11 11:23:59,348 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.21 ms. Allocated memory is still 140.0 MB. Free memory is still 108.7 MB. There was no memory consumed. Max. memory is 7.1 GB. [2019-01-11 11:23:59,348 INFO L168 Benchmark]: Boogie Procedure Inliner took 55.58 ms. Allocated memory is still 140.0 MB. Free memory was 107.2 MB in the beginning and 104.9 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.3 MB. Max. memory is 7.1 GB. [2019-01-11 11:23:59,348 INFO L168 Benchmark]: Boogie Preprocessor took 24.80 ms. Allocated memory is still 140.0 MB. Free memory was 104.9 MB in the beginning and 103.7 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2019-01-11 11:23:59,348 INFO L168 Benchmark]: RCFGBuilder took 589.02 ms. Allocated memory is still 140.0 MB. Free memory was 103.7 MB in the beginning and 91.1 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 7.1 GB. [2019-01-11 11:23:59,349 INFO L168 Benchmark]: TraceAbstraction took 616873.40 ms. Allocated memory was 140.0 MB in the beginning and 194.5 MB in the end (delta: 54.5 MB). Free memory was 90.9 MB in the beginning and 116.6 MB in the end (delta: -25.8 MB). Peak memory consumption was 28.8 MB. Max. memory is 7.1 GB. [2019-01-11 11:23:59,350 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.21 ms. Allocated memory is still 140.0 MB. Free memory is still 108.7 MB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 55.58 ms. Allocated memory is still 140.0 MB. Free memory was 107.2 MB in the beginning and 104.9 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 24.80 ms. Allocated memory is still 140.0 MB. Free memory was 104.9 MB in the beginning and 103.7 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 589.02 ms. Allocated memory is still 140.0 MB. Free memory was 103.7 MB in the beginning and 91.1 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 616873.40 ms. Allocated memory was 140.0 MB in the beginning and 194.5 MB in the end (delta: 54.5 MB). Free memory was 90.9 MB in the beginning and 116.6 MB in the end (delta: -25.8 MB). Peak memory consumption was 28.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:8192 -smt2 -in -t:2000)Received EOF on stdin. No stderr output. de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:8192 -smt2 -in -t:2000)Received EOF on stdin. No stderr output.: de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:208) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...