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_array_oct.epf -i ../../../trunk/examples/programs/heapseparator/speedup-poc-dd-6-unlimited.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.24-b7bd044-m [2019-01-18 18:08:57,986 INFO L170 SettingsManager]: Resetting all preferences to default values... [2019-01-18 18:08:57,988 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2019-01-18 18:08:58,000 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-01-18 18:08:58,000 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-01-18 18:08:58,002 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-01-18 18:08:58,003 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-01-18 18:08:58,005 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2019-01-18 18:08:58,006 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-01-18 18:08:58,007 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-01-18 18:08:58,008 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-01-18 18:08:58,008 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-01-18 18:08:58,009 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-01-18 18:08:58,010 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-01-18 18:08:58,011 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-01-18 18:08:58,012 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-01-18 18:08:58,013 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-01-18 18:08:58,015 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-01-18 18:08:58,017 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2019-01-18 18:08:58,019 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-01-18 18:08:58,020 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-01-18 18:08:58,021 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-01-18 18:08:58,025 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-01-18 18:08:58,025 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-01-18 18:08:58,026 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-01-18 18:08:58,027 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-01-18 18:08:58,031 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-01-18 18:08:58,032 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-01-18 18:08:58,032 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2019-01-18 18:08:58,033 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-01-18 18:08:58,033 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2019-01-18 18:08:58,034 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-01-18 18:08:58,034 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-01-18 18:08:58,034 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2019-01-18 18:08:58,039 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2019-01-18 18:08:58,040 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2019-01-18 18:08:58,040 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/array-bench/reach_32bit_array_oct.epf [2019-01-18 18:08:58,062 INFO L110 SettingsManager]: Loading preferences was successful [2019-01-18 18:08:58,062 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2019-01-18 18:08:58,063 INFO L131 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2019-01-18 18:08:58,063 INFO L133 SettingsManager]: * Show backtranslation warnings=false [2019-01-18 18:08:58,064 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-01-18 18:08:58,064 INFO L133 SettingsManager]: * User list type=DISABLED [2019-01-18 18:08:58,064 INFO L133 SettingsManager]: * Inline calls to unimplemented procedures=true [2019-01-18 18:08:58,064 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-01-18 18:08:58,064 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-01-18 18:08:58,065 INFO L133 SettingsManager]: * Underlying domain=OctagonDomain [2019-01-18 18:08:58,065 INFO L133 SettingsManager]: * Abstract domain=ArrayDomain [2019-01-18 18:08:58,065 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-01-18 18:08:58,065 INFO L133 SettingsManager]: * Interval Domain=false [2019-01-18 18:08:58,066 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-01-18 18:08:58,066 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2019-01-18 18:08:58,067 INFO L133 SettingsManager]: * Use SBE=true [2019-01-18 18:08:58,067 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-01-18 18:08:58,067 INFO L133 SettingsManager]: * sizeof long=4 [2019-01-18 18:08:58,067 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2019-01-18 18:08:58,067 INFO L133 SettingsManager]: * sizeof POINTER=4 [2019-01-18 18:08:58,068 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2019-01-18 18:08:58,068 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-01-18 18:08:58,068 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-01-18 18:08:58,068 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-01-18 18:08:58,068 INFO L133 SettingsManager]: * sizeof long double=12 [2019-01-18 18:08:58,069 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2019-01-18 18:08:58,070 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-01-18 18:08:58,071 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-01-18 18:08:58,071 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-01-18 18:08:58,071 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2019-01-18 18:08:58,071 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-01-18 18:08:58,071 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-01-18 18:08:58,072 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-01-18 18:08:58,072 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-01-18 18:08:58,072 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-01-18 18:08:58,072 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-01-18 18:08:58,072 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-01-18 18:08:58,072 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-01-18 18:08:58,073 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-01-18 18:08:58,122 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-01-18 18:08:58,135 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-01-18 18:08:58,139 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-01-18 18:08:58,141 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2019-01-18 18:08:58,141 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2019-01-18 18:08:58,142 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/heapseparator/speedup-poc-dd-6-unlimited.bpl [2019-01-18 18:08:58,142 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/heapseparator/speedup-poc-dd-6-unlimited.bpl' [2019-01-18 18:08:58,199 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-01-18 18:08:58,200 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-01-18 18:08:58,201 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-01-18 18:08:58,201 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-01-18 18:08:58,201 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2019-01-18 18:08:58,218 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "speedup-poc-dd-6-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 06:08:58" (1/1) ... [2019-01-18 18:08:58,230 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "speedup-poc-dd-6-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 06:08:58" (1/1) ... [2019-01-18 18:08:58,263 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-01-18 18:08:58,264 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-01-18 18:08:58,264 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-01-18 18:08:58,265 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2019-01-18 18:08:58,276 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "speedup-poc-dd-6-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 06:08:58" (1/1) ... [2019-01-18 18:08:58,276 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "speedup-poc-dd-6-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 06:08:58" (1/1) ... [2019-01-18 18:08:58,279 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "speedup-poc-dd-6-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 06:08:58" (1/1) ... [2019-01-18 18:08:58,280 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "speedup-poc-dd-6-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 06:08:58" (1/1) ... [2019-01-18 18:08:58,286 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "speedup-poc-dd-6-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 06:08:58" (1/1) ... [2019-01-18 18:08:58,290 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "speedup-poc-dd-6-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 06:08:58" (1/1) ... [2019-01-18 18:08:58,292 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "speedup-poc-dd-6-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 06:08:58" (1/1) ... [2019-01-18 18:08:58,294 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-01-18 18:08:58,298 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-01-18 18:08:58,298 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-01-18 18:08:58,298 INFO L276 PluginConnector]: RCFGBuilder initialized [2019-01-18 18:08:58,299 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "speedup-poc-dd-6-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 06:08:58" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-01-18 18:08:58,366 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-01-18 18:08:58,366 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-01-18 18:08:58,632 INFO L281 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-01-18 18:08:58,633 INFO L286 CfgBuilder]: Removed 15 assue(true) statements. [2019-01-18 18:08:58,634 INFO L202 PluginConnector]: Adding new model speedup-poc-dd-6-unlimited.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.01 06:08:58 BoogieIcfgContainer [2019-01-18 18:08:58,634 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-01-18 18:08:58,635 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-01-18 18:08:58,635 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-01-18 18:08:58,638 INFO L276 PluginConnector]: TraceAbstraction initialized [2019-01-18 18:08:58,639 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "speedup-poc-dd-6-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 06:08:58" (1/2) ... [2019-01-18 18:08:58,640 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ca87e88 and model type speedup-poc-dd-6-unlimited.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.01 06:08:58, skipping insertion in model container [2019-01-18 18:08:58,640 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "speedup-poc-dd-6-unlimited.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.01 06:08:58" (2/2) ... [2019-01-18 18:08:58,642 INFO L112 eAbstractionObserver]: Analyzing ICFG speedup-poc-dd-6-unlimited.bpl [2019-01-18 18:08:58,651 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-01-18 18:08:58,659 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 6 error locations. [2019-01-18 18:08:58,676 INFO L257 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2019-01-18 18:08:58,709 INFO L382 AbstractCegarLoop]: Interprodecural is true [2019-01-18 18:08:58,709 INFO L383 AbstractCegarLoop]: Hoare is true [2019-01-18 18:08:58,709 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-01-18 18:08:58,710 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-01-18 18:08:58,710 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-01-18 18:08:58,710 INFO L387 AbstractCegarLoop]: Difference is false [2019-01-18 18:08:58,710 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-01-18 18:08:58,710 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-01-18 18:08:58,728 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states. [2019-01-18 18:08:58,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2019-01-18 18:08:58,734 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:08:58,735 INFO L402 BasicCegarLoop]: trace histogram [1, 1] [2019-01-18 18:08:58,738 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:08:58,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:08:58,745 INFO L82 PathProgramCache]: Analyzing trace with hash 988, now seen corresponding path program 1 times [2019-01-18 18:08:58,747 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:08:58,801 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:08:58,801 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:08:58,801 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:08:58,802 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:08:58,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:08:58,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:08:58,975 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-01-18 18:08:58,976 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2019-01-18 18:08:58,976 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-01-18 18:08:58,981 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-01-18 18:08:58,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-01-18 18:08:58,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-01-18 18:08:59,003 INFO L87 Difference]: Start difference. First operand 15 states. Second operand 3 states. [2019-01-18 18:08:59,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:08:59,280 INFO L93 Difference]: Finished difference Result 29 states and 39 transitions. [2019-01-18 18:08:59,280 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-01-18 18:08:59,282 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 2 [2019-01-18 18:08:59,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:08:59,296 INFO L225 Difference]: With dead ends: 29 [2019-01-18 18:08:59,296 INFO L226 Difference]: Without dead ends: 24 [2019-01-18 18:08:59,299 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 [2019-01-18 18:08:59,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-01-18 18:08:59,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 14. [2019-01-18 18:08:59,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-01-18 18:08:59,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 25 transitions. [2019-01-18 18:08:59,338 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 25 transitions. Word has length 2 [2019-01-18 18:08:59,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:08:59,339 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 25 transitions. [2019-01-18 18:08:59,339 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-01-18 18:08:59,339 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 25 transitions. [2019-01-18 18:08:59,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-01-18 18:08:59,340 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:08:59,340 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-01-18 18:08:59,341 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:08:59,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:08:59,341 INFO L82 PathProgramCache]: Analyzing trace with hash 30376, now seen corresponding path program 1 times [2019-01-18 18:08:59,342 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:08:59,343 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:08:59,343 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:08:59,343 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:08:59,343 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:08:59,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:08:59,454 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:08:59,454 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:08:59,454 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 18:08:59,455 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2019-01-18 18:08:59,459 INFO L207 CegarAbsIntRunner]: [0], [18], [27] [2019-01-18 18:08:59,533 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-18 18:08:59,534 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 18:09:00,438 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 18:09:00,439 INFO L272 AbstractInterpreter]: Visited 3 different actions 5 times. Merged at 1 different actions 1 times. Never widened. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-18 18:09:00,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:09:00,496 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 18:09:00,497 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:09:00,497 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 [2019-01-18 18:09:00,510 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:09:00,510 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 18:09:00,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:09:00,542 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 18:09:00,761 WARN L181 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2019-01-18 18:09:00,814 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:00,820 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 48 treesize of output 54 [2019-01-18 18:09:01,090 WARN L181 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 24 [2019-01-18 18:09:01,120 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:01,121 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:01,123 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 41 treesize of output 53 [2019-01-18 18:09:01,480 WARN L181 SmtUtils]: Spent 355.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 25 [2019-01-18 18:09:01,502 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:01,503 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:01,514 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:01,528 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:01,530 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 32 treesize of output 61 [2019-01-18 18:09:01,837 WARN L181 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 27 [2019-01-18 18:09:01,847 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:01,850 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:01,852 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:01,877 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:01,890 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:01,891 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:01,892 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 41 [2019-01-18 18:09:01,893 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2019-01-18 18:09:01,938 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:01,956 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:01,985 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:02,035 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-01-18 18:09:02,054 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2019-01-18 18:09:02,073 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2019-01-18 18:09:02,088 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2019-01-18 18:09:02,108 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 30 treesize of output 72 [2019-01-18 18:09:02,218 INFO L303 Elim1Store]: Index analysis took 102 ms [2019-01-18 18:09:02,220 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 71 [2019-01-18 18:09:02,221 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-01-18 18:09:02,288 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:02,508 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:02,671 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:02,685 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:02,699 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:02,741 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. [2019-01-18 18:09:02,741 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 6 variables, input treesize:72, output treesize:71 [2019-01-18 18:09:02,895 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:02,897 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 66 [2019-01-18 18:09:02,898 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:09:02,932 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-18 18:09:02,933 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:76, output treesize:50 [2019-01-18 18:09:03,018 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:09:03,018 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 18:09:03,049 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:09:03,073 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 18:09:03,073 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-01-18 18:09:03,073 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 18:09:03,074 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-01-18 18:09:03,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-01-18 18:09:03,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-01-18 18:09:03,076 INFO L87 Difference]: Start difference. First operand 14 states and 25 transitions. Second operand 6 states. [2019-01-18 18:09:03,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:09:03,446 INFO L93 Difference]: Finished difference Result 47 states and 68 transitions. [2019-01-18 18:09:03,446 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-01-18 18:09:03,446 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 3 [2019-01-18 18:09:03,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:09:03,447 INFO L225 Difference]: With dead ends: 47 [2019-01-18 18:09:03,448 INFO L226 Difference]: Without dead ends: 45 [2019-01-18 18:09:03,449 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2019-01-18 18:09:03,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2019-01-18 18:09:03,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 18. [2019-01-18 18:09:03,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-01-18 18:09:03,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 37 transitions. [2019-01-18 18:09:03,456 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 37 transitions. Word has length 3 [2019-01-18 18:09:03,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:09:03,456 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 37 transitions. [2019-01-18 18:09:03,456 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-01-18 18:09:03,456 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 37 transitions. [2019-01-18 18:09:03,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-01-18 18:09:03,457 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:09:03,457 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-01-18 18:09:03,457 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:09:03,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:09:03,458 INFO L82 PathProgramCache]: Analyzing trace with hash 30004, now seen corresponding path program 1 times [2019-01-18 18:09:03,460 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:09:03,461 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:09:03,462 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:09:03,462 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:09:03,462 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:09:03,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:09:03,551 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:09:03,552 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:09:03,552 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 18:09:03,552 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2019-01-18 18:09:03,552 INFO L207 CegarAbsIntRunner]: [0], [6], [27] [2019-01-18 18:09:03,558 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-18 18:09:03,558 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 18:09:03,993 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 18:09:03,994 INFO L272 AbstractInterpreter]: Visited 3 different actions 5 times. Merged at 1 different actions 1 times. Never widened. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-18 18:09:03,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:09:03,995 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 18:09:03,995 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:09:03,995 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 [2019-01-18 18:09:04,010 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:09:04,010 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 18:09:04,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:09:04,031 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 18:09:04,203 WARN L181 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2019-01-18 18:09:04,222 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 21 treesize of output 24 [2019-01-18 18:09:04,240 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 24 treesize of output 30 [2019-01-18 18:09:04,279 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:04,294 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:04,295 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 26 treesize of output 40 [2019-01-18 18:09:04,322 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:04,340 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:04,341 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:04,342 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 28 treesize of output 54 [2019-01-18 18:09:04,352 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:04,354 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:04,358 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:04,359 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:04,360 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2019-01-18 18:09:04,486 INFO L303 Elim1Store]: Index analysis took 123 ms [2019-01-18 18:09:04,487 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 71 [2019-01-18 18:09:04,488 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-18 18:09:04,715 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:04,740 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:04,758 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:04,798 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:04,822 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:04,903 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:04,905 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 48 treesize of output 54 [2019-01-18 18:09:04,960 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:04,960 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:04,961 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 41 treesize of output 53 [2019-01-18 18:09:05,023 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:05,024 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:05,024 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:05,026 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:05,027 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 32 treesize of output 61 [2019-01-18 18:09:05,091 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:05,092 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:05,093 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:05,095 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:05,096 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:05,097 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:05,098 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 41 [2019-01-18 18:09:05,099 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-01-18 18:09:05,118 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:05,136 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:05,153 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:05,188 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. [2019-01-18 18:09:05,189 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 7 variables, input treesize:72, output treesize:71 [2019-01-18 18:09:05,230 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:05,231 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 72 [2019-01-18 18:09:05,232 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:09:05,261 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-18 18:09:05,262 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:76, output treesize:50 [2019-01-18 18:09:05,277 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:09:05,278 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 18:09:05,291 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:09:05,313 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-01-18 18:09:05,314 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [2, 2] total 5 [2019-01-18 18:09:05,314 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-01-18 18:09:05,314 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-01-18 18:09:05,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-01-18 18:09:05,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2019-01-18 18:09:05,315 INFO L87 Difference]: Start difference. First operand 18 states and 37 transitions. Second operand 4 states. [2019-01-18 18:09:05,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:09:05,387 INFO L93 Difference]: Finished difference Result 23 states and 60 transitions. [2019-01-18 18:09:05,387 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-01-18 18:09:05,387 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 3 [2019-01-18 18:09:05,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:09:05,389 INFO L225 Difference]: With dead ends: 23 [2019-01-18 18:09:05,389 INFO L226 Difference]: Without dead ends: 22 [2019-01-18 18:09:05,389 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2019-01-18 18:09:05,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-01-18 18:09:05,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2019-01-18 18:09:05,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-01-18 18:09:05,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 59 transitions. [2019-01-18 18:09:05,395 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 59 transitions. Word has length 3 [2019-01-18 18:09:05,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:09:05,396 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 59 transitions. [2019-01-18 18:09:05,396 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-01-18 18:09:05,396 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 59 transitions. [2019-01-18 18:09:05,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-01-18 18:09:05,397 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:09:05,397 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-01-18 18:09:05,397 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:09:05,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:09:05,397 INFO L82 PathProgramCache]: Analyzing trace with hash 30562, now seen corresponding path program 1 times [2019-01-18 18:09:05,398 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:09:05,398 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:09:05,399 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:09:05,399 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:09:05,399 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:09:05,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:09:05,488 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:09:05,488 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:09:05,488 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 18:09:05,489 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2019-01-18 18:09:05,489 INFO L207 CegarAbsIntRunner]: [0], [24], [27] [2019-01-18 18:09:05,492 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-18 18:09:05,492 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 18:09:07,978 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 18:09:07,979 INFO L272 AbstractInterpreter]: Visited 3 different actions 11 times. Merged at 1 different actions 4 times. Widened at 1 different actions 1 times. Found 5 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-18 18:09:07,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:09:07,980 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 18:09:07,980 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:09:07,980 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 [2019-01-18 18:09:07,989 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:09:07,989 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 18:09:07,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:09:07,996 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 18:09:08,038 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:08,039 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 68 treesize of output 71 [2019-01-18 18:09:08,107 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:08,111 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:08,112 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2019-01-18 18:09:08,195 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:08,196 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:08,197 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:08,199 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:08,200 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 46 treesize of output 72 [2019-01-18 18:09:08,259 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:08,261 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:08,264 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:08,267 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:08,269 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:08,271 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:08,272 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 37 treesize of output 80 [2019-01-18 18:09:08,370 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:08,371 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:08,371 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:08,372 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:08,377 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:08,377 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:08,378 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:08,379 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:08,380 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 31 treesize of output 61 [2019-01-18 18:09:08,380 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2019-01-18 18:09:08,407 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:08,438 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:08,470 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:08,517 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:08,604 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-01-18 18:09:08,609 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2019-01-18 18:09:08,613 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2019-01-18 18:09:08,618 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 14 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2019-01-18 18:09:08,623 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 15 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2019-01-18 18:09:08,629 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 91 [2019-01-18 18:09:08,630 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2019-01-18 18:09:08,686 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:08,707 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:08,726 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:08,742 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:08,832 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:08,900 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. [2019-01-18 18:09:08,901 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 6 variables, input treesize:92, output treesize:91 [2019-01-18 18:09:08,936 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:08,937 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 41 treesize of output 97 [2019-01-18 18:09:08,938 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:09:08,985 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. [2019-01-18 18:09:08,986 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:101, output treesize:71 [2019-01-18 18:09:09,011 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:09:09,011 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 18:09:09,023 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:09:09,042 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 18:09:09,043 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-01-18 18:09:09,043 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 18:09:09,043 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-01-18 18:09:09,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-01-18 18:09:09,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-01-18 18:09:09,044 INFO L87 Difference]: Start difference. First operand 21 states and 59 transitions. Second operand 6 states. [2019-01-18 18:09:09,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:09:09,222 INFO L93 Difference]: Finished difference Result 39 states and 79 transitions. [2019-01-18 18:09:09,222 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-01-18 18:09:09,222 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 3 [2019-01-18 18:09:09,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:09:09,224 INFO L225 Difference]: With dead ends: 39 [2019-01-18 18:09:09,224 INFO L226 Difference]: Without dead ends: 36 [2019-01-18 18:09:09,225 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-01-18 18:09:09,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-01-18 18:09:09,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 23. [2019-01-18 18:09:09,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-01-18 18:09:09,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 67 transitions. [2019-01-18 18:09:09,231 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 67 transitions. Word has length 3 [2019-01-18 18:09:09,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:09:09,231 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 67 transitions. [2019-01-18 18:09:09,231 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-01-18 18:09:09,232 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 67 transitions. [2019-01-18 18:09:09,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-01-18 18:09:09,232 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:09:09,232 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-01-18 18:09:09,232 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:09:09,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:09:09,233 INFO L82 PathProgramCache]: Analyzing trace with hash 30128, now seen corresponding path program 1 times [2019-01-18 18:09:09,233 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:09:09,234 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:09:09,234 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:09:09,234 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:09:09,234 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:09:09,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:09:09,284 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:09:09,285 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:09:09,285 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 18:09:09,285 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2019-01-18 18:09:09,285 INFO L207 CegarAbsIntRunner]: [0], [10], [27] [2019-01-18 18:09:09,287 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-18 18:09:09,287 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 18:09:09,620 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 18:09:09,621 INFO L272 AbstractInterpreter]: Visited 3 different actions 5 times. Merged at 1 different actions 1 times. Never widened. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-18 18:09:09,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:09:09,621 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 18:09:09,621 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:09:09,622 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 [2019-01-18 18:09:09,636 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:09:09,637 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 18:09:09,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:09:09,657 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 18:09:09,770 WARN L181 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2019-01-18 18:09:09,777 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 21 treesize of output 24 [2019-01-18 18:09:09,781 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 24 treesize of output 30 [2019-01-18 18:09:09,786 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:09,787 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:09,788 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 26 treesize of output 40 [2019-01-18 18:09:09,803 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:09,804 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:09,804 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:09,805 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 28 treesize of output 54 [2019-01-18 18:09:09,810 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:09,811 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:09,813 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:09,814 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:09,816 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 30 treesize of output 72 [2019-01-18 18:09:09,829 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 71 [2019-01-18 18:09:09,830 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-18 18:09:09,857 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:09,880 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:09,898 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:09,913 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:09,926 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:09,957 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:09,958 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 48 treesize of output 54 [2019-01-18 18:09:10,014 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:10,016 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:10,018 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 41 treesize of output 53 [2019-01-18 18:09:10,053 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:10,055 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:10,056 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:10,057 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:10,058 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 32 treesize of output 61 [2019-01-18 18:09:10,104 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:10,105 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:10,106 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:10,108 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:10,109 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:10,110 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:10,111 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 41 [2019-01-18 18:09:10,112 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-01-18 18:09:10,128 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:10,142 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:10,157 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:10,190 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. [2019-01-18 18:09:10,190 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 6 variables, input treesize:72, output treesize:71 [2019-01-18 18:09:10,229 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:10,230 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 72 [2019-01-18 18:09:10,231 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:09:10,264 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-18 18:09:10,264 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:76, output treesize:50 [2019-01-18 18:09:10,279 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:09:10,279 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 18:09:10,319 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:09:10,340 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 18:09:10,340 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-01-18 18:09:10,340 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 18:09:10,340 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-01-18 18:09:10,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-01-18 18:09:10,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-01-18 18:09:10,341 INFO L87 Difference]: Start difference. First operand 23 states and 67 transitions. Second operand 6 states. [2019-01-18 18:09:10,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:09:10,517 INFO L93 Difference]: Finished difference Result 49 states and 101 transitions. [2019-01-18 18:09:10,517 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-01-18 18:09:10,517 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 3 [2019-01-18 18:09:10,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:09:10,518 INFO L225 Difference]: With dead ends: 49 [2019-01-18 18:09:10,518 INFO L226 Difference]: Without dead ends: 47 [2019-01-18 18:09:10,519 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2019-01-18 18:09:10,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-01-18 18:09:10,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 25. [2019-01-18 18:09:10,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-01-18 18:09:10,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 80 transitions. [2019-01-18 18:09:10,526 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 80 transitions. Word has length 3 [2019-01-18 18:09:10,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:09:10,526 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 80 transitions. [2019-01-18 18:09:10,526 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-01-18 18:09:10,527 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 80 transitions. [2019-01-18 18:09:10,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-18 18:09:10,527 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:09:10,527 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-18 18:09:10,528 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:09:10,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:09:10,528 INFO L82 PathProgramCache]: Analyzing trace with hash 941528, now seen corresponding path program 1 times [2019-01-18 18:09:10,528 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:09:10,529 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:09:10,529 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:09:10,529 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:09:10,529 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:09:10,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:09:10,587 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:09:10,587 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:09:10,587 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 18:09:10,587 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-18 18:09:10,588 INFO L207 CegarAbsIntRunner]: [0], [18], [22], [27] [2019-01-18 18:09:10,590 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-18 18:09:10,591 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 18:09:10,925 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 18:09:10,926 INFO L272 AbstractInterpreter]: Visited 4 different actions 7 times. Merged at 1 different actions 1 times. Never widened. Found 4 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-18 18:09:10,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:09:10,926 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 18:09:10,926 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:09:10,926 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 [2019-01-18 18:09:10,934 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:09:10,935 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 18:09:10,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:09:10,943 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 18:09:10,977 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 21 treesize of output 24 [2019-01-18 18:09:10,979 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 24 treesize of output 30 [2019-01-18 18:09:10,999 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:11,004 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:11,005 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 26 treesize of output 40 [2019-01-18 18:09:11,012 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:11,013 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:11,014 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:11,015 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 28 treesize of output 54 [2019-01-18 18:09:11,020 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:11,023 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:11,023 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:11,024 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:11,025 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 30 treesize of output 72 [2019-01-18 18:09:11,039 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 71 [2019-01-18 18:09:11,040 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-18 18:09:11,067 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:11,125 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:11,143 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:11,158 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:11,171 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:11,199 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:11,200 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 48 treesize of output 54 [2019-01-18 18:09:11,230 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:11,234 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:11,235 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 41 treesize of output 53 [2019-01-18 18:09:11,268 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:11,269 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:11,270 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:11,271 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:11,273 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 32 treesize of output 61 [2019-01-18 18:09:11,343 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:11,344 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:11,345 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:11,347 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:11,348 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:11,349 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:11,350 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 41 [2019-01-18 18:09:11,351 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-01-18 18:09:11,368 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:11,384 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:11,400 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:11,432 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 18:09:11,433 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 5 variables, input treesize:72, output treesize:71 [2019-01-18 18:09:11,474 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:11,475 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 66 [2019-01-18 18:09:11,476 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:09:11,505 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 18:09:11,506 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:76, output treesize:50 [2019-01-18 18:09:11,556 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:11,557 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:11,558 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:11,559 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:11,560 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:11,562 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:11,563 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:11,564 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 80 [2019-01-18 18:09:11,566 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:09:11,599 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-18 18:09:11,599 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:62, output treesize:40 [2019-01-18 18:09:11,615 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:09:11,616 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 18:09:11,639 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:09:11,659 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 18:09:11,659 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-18 18:09:11,660 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 18:09:11,660 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-18 18:09:11,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-18 18:09:11,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2019-01-18 18:09:11,661 INFO L87 Difference]: Start difference. First operand 25 states and 80 transitions. Second operand 8 states. [2019-01-18 18:09:12,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:09:12,207 INFO L93 Difference]: Finished difference Result 61 states and 138 transitions. [2019-01-18 18:09:12,208 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-18 18:09:12,208 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-18 18:09:12,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:09:12,210 INFO L225 Difference]: With dead ends: 61 [2019-01-18 18:09:12,210 INFO L226 Difference]: Without dead ends: 57 [2019-01-18 18:09:12,211 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2019-01-18 18:09:12,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2019-01-18 18:09:12,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 29. [2019-01-18 18:09:12,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-01-18 18:09:12,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 98 transitions. [2019-01-18 18:09:12,217 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 98 transitions. Word has length 4 [2019-01-18 18:09:12,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:09:12,218 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 98 transitions. [2019-01-18 18:09:12,218 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-18 18:09:12,218 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 98 transitions. [2019-01-18 18:09:12,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-18 18:09:12,218 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:09:12,219 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-18 18:09:12,219 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:09:12,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:09:12,219 INFO L82 PathProgramCache]: Analyzing trace with hash 941590, now seen corresponding path program 1 times [2019-01-18 18:09:12,219 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:09:12,220 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:09:12,220 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:09:12,220 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:09:12,220 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:09:12,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:09:12,376 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:09:12,376 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:09:12,376 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 18:09:12,377 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-18 18:09:12,377 INFO L207 CegarAbsIntRunner]: [0], [18], [24], [27] [2019-01-18 18:09:12,378 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-18 18:09:12,379 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 18:09:12,755 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 18:09:12,755 INFO L272 AbstractInterpreter]: Visited 4 different actions 7 times. Merged at 1 different actions 1 times. Never widened. Found 4 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-18 18:09:12,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:09:12,756 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 18:09:12,756 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:09:12,756 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 [2019-01-18 18:09:12,765 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:09:12,765 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 18:09:12,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:09:12,775 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 18:09:12,807 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:12,808 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 68 treesize of output 71 [2019-01-18 18:09:12,868 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:12,868 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:12,869 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 58 treesize of output 67 [2019-01-18 18:09:12,913 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:12,914 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:12,916 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:12,917 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:12,918 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 46 treesize of output 72 [2019-01-18 18:09:12,967 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:12,968 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:12,969 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:12,969 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:12,970 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:12,972 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:12,973 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 37 treesize of output 80 [2019-01-18 18:09:13,035 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:13,037 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:13,038 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:13,039 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:13,040 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:13,041 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:13,042 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:13,043 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:13,045 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 31 treesize of output 61 [2019-01-18 18:09:13,046 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2019-01-18 18:09:13,070 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:13,095 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:13,121 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:13,164 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:13,210 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-01-18 18:09:13,217 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2019-01-18 18:09:13,220 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2019-01-18 18:09:13,225 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 14 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2019-01-18 18:09:13,228 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 15 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2019-01-18 18:09:13,231 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 91 [2019-01-18 18:09:13,232 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2019-01-18 18:09:13,282 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:13,309 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:13,330 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:13,348 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:13,364 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:13,422 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 18:09:13,422 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 5 variables, input treesize:92, output treesize:91 [2019-01-18 18:09:13,484 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:13,485 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 41 treesize of output 91 [2019-01-18 18:09:13,486 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:09:13,536 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-18 18:09:13,537 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:101, output treesize:71 [2019-01-18 18:09:13,562 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:13,563 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:13,564 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:13,565 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:13,566 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:13,567 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:13,568 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 18:09:13,569 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 43 treesize of output 106 [2019-01-18 18:09:13,570 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:09:13,615 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. [2019-01-18 18:09:13,616 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:83, output treesize:59 [2019-01-18 18:09:13,635 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:09:13,636 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 18:09:13,661 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:09:13,680 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 18:09:13,681 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-18 18:09:13,681 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 18:09:13,681 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-18 18:09:13,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-18 18:09:13,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2019-01-18 18:09:13,682 INFO L87 Difference]: Start difference. First operand 29 states and 98 transitions. Second operand 8 states. [2019-01-18 18:09:14,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:09:14,120 INFO L93 Difference]: Finished difference Result 59 states and 140 transitions. [2019-01-18 18:09:14,120 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-18 18:09:14,120 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-18 18:09:14,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:09:14,122 INFO L225 Difference]: With dead ends: 59 [2019-01-18 18:09:14,122 INFO L226 Difference]: Without dead ends: 55 [2019-01-18 18:09:14,123 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2019-01-18 18:09:14,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-01-18 18:09:14,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 30. [2019-01-18 18:09:14,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-01-18 18:09:14,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 110 transitions. [2019-01-18 18:09:14,131 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 110 transitions. Word has length 4 [2019-01-18 18:09:14,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:09:14,131 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 110 transitions. [2019-01-18 18:09:14,131 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-18 18:09:14,131 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 110 transitions. [2019-01-18 18:09:14,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-18 18:09:14,132 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:09:14,132 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-18 18:09:14,132 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:09:14,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:09:14,132 INFO L82 PathProgramCache]: Analyzing trace with hash 941156, now seen corresponding path program 1 times [2019-01-18 18:09:14,132 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:09:14,133 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:09:14,133 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:09:14,133 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:09:14,133 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:09:14,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:09:14,205 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:09:14,206 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:09:14,206 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 18:09:14,206 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-18 18:09:14,206 INFO L207 CegarAbsIntRunner]: [0], [10], [18], [27] [2019-01-18 18:09:14,207 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-18 18:09:14,207 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 18:09:14,536 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 18:09:14,536 INFO L272 AbstractInterpreter]: Visited 4 different actions 7 times. Merged at 1 different actions 1 times. Never widened. Found 4 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-18 18:09:14,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:09:14,537 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 18:09:14,537 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:09:14,537 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 [2019-01-18 18:09:14,547 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:09:14,547 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 18:09:14,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:09:14,553 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 18:09:14,579 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 21 treesize of output 24 [2019-01-18 18:09:14,587 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 24 treesize of output 30 [2019-01-18 18:09:14,592 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:14,594 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:14,594 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 26 treesize of output 40 [2019-01-18 18:09:14,616 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:14,619 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:14,621 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:14,622 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 28 treesize of output 54 [2019-01-18 18:09:14,629 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:14,647 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:14,648 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:14,651 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:14,652 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 30 treesize of output 72 [2019-01-18 18:09:14,664 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 71 [2019-01-18 18:09:14,664 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-18 18:09:14,691 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:14,714 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:14,731 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:14,746 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:14,759 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:14,789 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:14,790 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 48 treesize of output 54 [2019-01-18 18:09:14,824 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:14,826 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:14,827 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 41 treesize of output 53 [2019-01-18 18:09:14,861 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:14,862 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:14,863 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:14,864 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:14,865 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 32 treesize of output 61 [2019-01-18 18:09:14,906 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:14,907 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:14,909 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:14,910 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:14,911 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:14,912 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:14,913 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 41 [2019-01-18 18:09:14,913 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-01-18 18:09:14,932 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:14,948 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:14,964 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:14,997 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 18:09:14,998 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 5 variables, input treesize:72, output treesize:71 [2019-01-18 18:09:15,037 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:15,038 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 66 [2019-01-18 18:09:15,039 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:09:15,069 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 18:09:15,069 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:76, output treesize:50 [2019-01-18 18:09:15,092 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:15,093 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:15,093 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:15,094 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:15,095 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:15,096 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 18:09:15,097 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 81 [2019-01-18 18:09:15,098 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:09:15,128 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-18 18:09:15,129 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:62, output treesize:42 [2019-01-18 18:09:15,147 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:09:15,147 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 18:09:15,177 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:09:15,196 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 18:09:15,197 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-18 18:09:15,197 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 18:09:15,197 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-18 18:09:15,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-18 18:09:15,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2019-01-18 18:09:15,198 INFO L87 Difference]: Start difference. First operand 30 states and 110 transitions. Second operand 8 states. [2019-01-18 18:09:15,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:09:15,602 INFO L93 Difference]: Finished difference Result 57 states and 144 transitions. [2019-01-18 18:09:15,603 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-18 18:09:15,603 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-18 18:09:15,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:09:15,604 INFO L225 Difference]: With dead ends: 57 [2019-01-18 18:09:15,604 INFO L226 Difference]: Without dead ends: 55 [2019-01-18 18:09:15,605 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2019-01-18 18:09:15,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-01-18 18:09:15,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 30. [2019-01-18 18:09:15,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-01-18 18:09:15,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 109 transitions. [2019-01-18 18:09:15,613 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 109 transitions. Word has length 4 [2019-01-18 18:09:15,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:09:15,613 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 109 transitions. [2019-01-18 18:09:15,614 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-18 18:09:15,614 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 109 transitions. [2019-01-18 18:09:15,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-18 18:09:15,614 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:09:15,614 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-18 18:09:15,615 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:09:15,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:09:15,615 INFO L82 PathProgramCache]: Analyzing trace with hash 941280, now seen corresponding path program 1 times [2019-01-18 18:09:15,615 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:09:15,616 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:09:15,616 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:09:15,616 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:09:15,616 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:09:15,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:09:15,711 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:09:15,711 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:09:15,711 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 18:09:15,712 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-18 18:09:15,712 INFO L207 CegarAbsIntRunner]: [0], [14], [18], [27] [2019-01-18 18:09:15,713 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-18 18:09:15,713 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 18:09:16,113 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 18:09:16,113 INFO L272 AbstractInterpreter]: Visited 4 different actions 7 times. Merged at 1 different actions 1 times. Never widened. Found 4 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-18 18:09:16,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:09:16,114 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 18:09:16,114 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:09:16,114 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 [2019-01-18 18:09:16,133 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:09:16,144 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 18:09:16,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:09:16,168 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 18:09:16,206 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:16,207 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 48 treesize of output 54 [2019-01-18 18:09:16,239 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:16,240 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:16,241 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 41 treesize of output 53 [2019-01-18 18:09:16,276 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:16,277 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:16,278 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:16,279 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:16,280 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 61 [2019-01-18 18:09:16,333 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:16,334 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:16,335 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:16,336 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:16,337 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:16,338 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:16,339 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 41 [2019-01-18 18:09:16,340 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2019-01-18 18:09:16,356 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:16,372 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:16,389 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:16,413 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-01-18 18:09:16,416 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2019-01-18 18:09:16,420 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2019-01-18 18:09:16,423 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2019-01-18 18:09:16,437 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 30 treesize of output 72 [2019-01-18 18:09:16,445 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 71 [2019-01-18 18:09:16,446 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-01-18 18:09:16,802 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:16,927 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:16,943 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:16,956 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:16,968 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:17,001 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 18:09:17,001 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 5 variables, input treesize:72, output treesize:71 [2019-01-18 18:09:17,081 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:17,082 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 66 [2019-01-18 18:09:17,082 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:09:17,109 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 18:09:17,110 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:76, output treesize:50 [2019-01-18 18:09:17,154 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:17,155 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:17,155 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:17,156 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:17,157 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:17,158 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:17,160 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:17,161 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 88 [2019-01-18 18:09:17,161 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:09:17,194 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-18 18:09:17,194 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:62, output treesize:40 [2019-01-18 18:09:17,219 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:09:17,219 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 18:09:17,242 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:09:17,262 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 18:09:17,263 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-18 18:09:17,263 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 18:09:17,263 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-18 18:09:17,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-18 18:09:17,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2019-01-18 18:09:17,264 INFO L87 Difference]: Start difference. First operand 30 states and 109 transitions. Second operand 8 states. [2019-01-18 18:09:17,447 WARN L181 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2019-01-18 18:09:17,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:09:17,865 INFO L93 Difference]: Finished difference Result 57 states and 158 transitions. [2019-01-18 18:09:17,865 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-18 18:09:17,865 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-18 18:09:17,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:09:17,867 INFO L225 Difference]: With dead ends: 57 [2019-01-18 18:09:17,867 INFO L226 Difference]: Without dead ends: 53 [2019-01-18 18:09:17,868 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2019-01-18 18:09:17,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-01-18 18:09:17,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 31. [2019-01-18 18:09:17,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-01-18 18:09:17,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 126 transitions. [2019-01-18 18:09:17,877 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 126 transitions. Word has length 4 [2019-01-18 18:09:17,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:09:17,878 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 126 transitions. [2019-01-18 18:09:17,878 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-18 18:09:17,878 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 126 transitions. [2019-01-18 18:09:17,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-18 18:09:17,878 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:09:17,879 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-18 18:09:17,879 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:09:17,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:09:17,879 INFO L82 PathProgramCache]: Analyzing trace with hash 929872, now seen corresponding path program 1 times [2019-01-18 18:09:17,879 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:09:17,880 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:09:17,880 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:09:17,880 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:09:17,881 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:09:17,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:09:17,974 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:09:17,974 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:09:17,974 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 18:09:17,975 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-18 18:09:17,975 INFO L207 CegarAbsIntRunner]: [0], [6], [18], [27] [2019-01-18 18:09:17,976 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-18 18:09:17,976 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 18:09:18,248 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 18:09:18,248 INFO L272 AbstractInterpreter]: Visited 4 different actions 7 times. Merged at 1 different actions 1 times. Never widened. Found 4 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-18 18:09:18,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:09:18,249 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 18:09:18,249 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:09:18,249 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 [2019-01-18 18:09:18,257 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:09:18,258 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 18:09:18,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:09:18,264 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 18:09:18,300 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:18,300 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 48 treesize of output 54 [2019-01-18 18:09:18,345 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:18,347 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:18,347 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 41 treesize of output 53 [2019-01-18 18:09:18,397 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:18,399 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:18,401 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:18,403 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:18,404 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 32 treesize of output 61 [2019-01-18 18:09:18,465 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:18,468 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:18,471 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:18,474 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:18,477 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:18,480 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:18,480 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 41 [2019-01-18 18:09:18,481 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2019-01-18 18:09:18,516 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:18,544 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:18,568 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:18,598 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-01-18 18:09:18,604 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2019-01-18 18:09:18,611 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2019-01-18 18:09:18,614 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2019-01-18 18:09:18,616 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 30 treesize of output 72 [2019-01-18 18:09:18,626 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 71 [2019-01-18 18:09:18,627 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-01-18 18:09:18,655 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:18,673 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:18,689 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:18,702 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:18,714 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:18,747 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. [2019-01-18 18:09:18,748 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 6 variables, input treesize:72, output treesize:71 [2019-01-18 18:09:18,786 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:18,786 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 72 [2019-01-18 18:09:18,787 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:09:18,817 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 18:09:18,817 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:76, output treesize:50 [2019-01-18 18:09:18,846 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:18,847 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:18,847 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:18,848 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:18,849 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:18,849 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:18,850 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:18,851 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-18 18:09:18,852 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:09:18,883 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-18 18:09:18,883 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:60, output treesize:38 [2019-01-18 18:09:18,899 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:09:18,899 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 18:09:18,912 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:09:18,932 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 18:09:18,932 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 8 [2019-01-18 18:09:18,932 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 18:09:18,932 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-18 18:09:18,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-18 18:09:18,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2019-01-18 18:09:18,933 INFO L87 Difference]: Start difference. First operand 31 states and 126 transitions. Second operand 8 states. [2019-01-18 18:09:19,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:09:19,368 INFO L93 Difference]: Finished difference Result 73 states and 228 transitions. [2019-01-18 18:09:19,368 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-01-18 18:09:19,369 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-18 18:09:19,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:09:19,370 INFO L225 Difference]: With dead ends: 73 [2019-01-18 18:09:19,370 INFO L226 Difference]: Without dead ends: 71 [2019-01-18 18:09:19,371 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2019-01-18 18:09:19,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2019-01-18 18:09:19,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 40. [2019-01-18 18:09:19,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-01-18 18:09:19,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 173 transitions. [2019-01-18 18:09:19,381 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 173 transitions. Word has length 4 [2019-01-18 18:09:19,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:09:19,381 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 173 transitions. [2019-01-18 18:09:19,381 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-18 18:09:19,381 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 173 transitions. [2019-01-18 18:09:19,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-18 18:09:19,382 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:09:19,382 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-18 18:09:19,383 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:09:19,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:09:19,383 INFO L82 PathProgramCache]: Analyzing trace with hash 930184, now seen corresponding path program 1 times [2019-01-18 18:09:19,383 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:09:19,384 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:09:19,384 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:09:19,384 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:09:19,384 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:09:19,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:09:19,463 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:09:19,464 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:09:19,464 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 18:09:19,464 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-18 18:09:19,464 INFO L207 CegarAbsIntRunner]: [0], [6], [28], [29] [2019-01-18 18:09:19,466 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-18 18:09:19,466 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 18:09:19,648 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 18:09:19,648 INFO L272 AbstractInterpreter]: Visited 4 different actions 6 times. Merged at 1 different actions 1 times. Never widened. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-18 18:09:19,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:09:19,649 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 18:09:19,649 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:09:19,649 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 [2019-01-18 18:09:19,657 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:09:19,658 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 18:09:19,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:09:19,663 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 18:09:19,824 WARN L181 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2019-01-18 18:09:19,838 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 21 treesize of output 24 [2019-01-18 18:09:19,853 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 24 treesize of output 30 [2019-01-18 18:09:19,892 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:19,917 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:19,918 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 26 treesize of output 40 [2019-01-18 18:09:19,956 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:19,981 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:19,994 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:19,995 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 28 treesize of output 54 [2019-01-18 18:09:20,001 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:20,008 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:20,011 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:20,013 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:20,013 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 30 treesize of output 72 [2019-01-18 18:09:20,023 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 71 [2019-01-18 18:09:20,024 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-18 18:09:20,051 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:20,072 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:20,089 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:20,104 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:20,117 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:20,146 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:20,147 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 48 treesize of output 54 [2019-01-18 18:09:20,178 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:20,179 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:20,180 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 41 treesize of output 53 [2019-01-18 18:09:20,215 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:20,216 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:20,218 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:20,219 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:20,219 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 32 treesize of output 61 [2019-01-18 18:09:20,263 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:20,264 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:20,266 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:20,267 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:20,277 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:20,303 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:20,304 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 41 [2019-01-18 18:09:20,304 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-01-18 18:09:20,321 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:20,337 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:20,352 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:20,385 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. [2019-01-18 18:09:20,386 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 6 variables, input treesize:72, output treesize:71 [2019-01-18 18:09:20,494 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:20,495 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 72 [2019-01-18 18:09:20,495 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:09:20,524 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-18 18:09:20,525 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:76, output treesize:50 [2019-01-18 18:09:20,539 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:09:20,540 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 18:09:20,548 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:09:20,568 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 18:09:20,569 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-01-18 18:09:20,569 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 18:09:20,569 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-01-18 18:09:20,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-01-18 18:09:20,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-01-18 18:09:20,569 INFO L87 Difference]: Start difference. First operand 40 states and 173 transitions. Second operand 6 states. [2019-01-18 18:09:20,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:09:20,752 INFO L93 Difference]: Finished difference Result 56 states and 192 transitions. [2019-01-18 18:09:20,754 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-01-18 18:09:20,754 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 4 [2019-01-18 18:09:20,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:09:20,755 INFO L225 Difference]: With dead ends: 56 [2019-01-18 18:09:20,755 INFO L226 Difference]: Without dead ends: 55 [2019-01-18 18:09:20,756 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2019-01-18 18:09:20,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-01-18 18:09:20,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 42. [2019-01-18 18:09:20,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-01-18 18:09:20,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 180 transitions. [2019-01-18 18:09:20,766 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 180 transitions. Word has length 4 [2019-01-18 18:09:20,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:09:20,767 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 180 transitions. [2019-01-18 18:09:20,767 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-01-18 18:09:20,767 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 180 transitions. [2019-01-18 18:09:20,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-18 18:09:20,767 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:09:20,768 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-18 18:09:20,768 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:09:20,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:09:20,768 INFO L82 PathProgramCache]: Analyzing trace with hash 945434, now seen corresponding path program 1 times [2019-01-18 18:09:20,768 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:09:20,769 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:09:20,769 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:09:20,769 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:09:20,769 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:09:20,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:09:20,887 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:09:20,887 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:09:20,887 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 18:09:20,888 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-18 18:09:20,888 INFO L207 CegarAbsIntRunner]: [0], [22], [24], [27] [2019-01-18 18:09:20,889 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-18 18:09:20,889 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 18:09:21,253 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 18:09:21,253 INFO L272 AbstractInterpreter]: Visited 4 different actions 7 times. Merged at 1 different actions 1 times. Never widened. Found 4 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-18 18:09:21,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:09:21,253 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 18:09:21,254 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:09:21,254 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 [2019-01-18 18:09:21,272 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:09:21,272 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 18:09:21,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:09:21,278 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 18:09:21,316 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:21,317 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 68 treesize of output 71 [2019-01-18 18:09:21,370 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:21,371 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:21,371 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2019-01-18 18:09:21,413 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:21,414 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:21,416 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:21,418 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:21,419 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 46 treesize of output 72 [2019-01-18 18:09:21,468 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:21,471 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:21,473 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:21,475 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:21,476 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:21,478 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:21,479 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 37 treesize of output 80 [2019-01-18 18:09:21,566 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:21,567 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:21,568 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:21,569 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:21,570 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:21,572 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:21,573 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:21,575 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:21,576 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 31 treesize of output 61 [2019-01-18 18:09:21,577 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2019-01-18 18:09:21,625 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:21,655 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:21,685 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:21,719 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:21,779 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-01-18 18:09:21,782 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2019-01-18 18:09:21,786 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2019-01-18 18:09:21,789 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 14 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2019-01-18 18:09:21,791 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 15 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2019-01-18 18:09:21,809 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 91 [2019-01-18 18:09:21,810 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2019-01-18 18:09:21,852 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:21,873 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:21,889 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:21,901 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:21,913 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:21,957 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 18:09:21,958 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 5 variables, input treesize:92, output treesize:91 [2019-01-18 18:09:22,004 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:22,005 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 41 treesize of output 97 [2019-01-18 18:09:22,005 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:09:22,050 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-18 18:09:22,050 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:101, output treesize:71 [2019-01-18 18:09:22,136 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:22,137 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:22,138 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:22,139 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:22,140 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:22,141 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:22,142 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:22,143 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:22,144 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 41 treesize of output 111 [2019-01-18 18:09:22,145 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:09:22,195 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. [2019-01-18 18:09:22,195 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:81, output treesize:55 [2019-01-18 18:09:22,215 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:09:22,215 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 18:09:22,231 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:09:22,251 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 18:09:22,251 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 8 [2019-01-18 18:09:22,251 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 18:09:22,251 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-18 18:09:22,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-18 18:09:22,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2019-01-18 18:09:22,252 INFO L87 Difference]: Start difference. First operand 42 states and 180 transitions. Second operand 8 states. [2019-01-18 18:09:22,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:09:22,710 INFO L93 Difference]: Finished difference Result 96 states and 313 transitions. [2019-01-18 18:09:22,711 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-01-18 18:09:22,711 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-18 18:09:22,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:09:22,713 INFO L225 Difference]: With dead ends: 96 [2019-01-18 18:09:22,713 INFO L226 Difference]: Without dead ends: 93 [2019-01-18 18:09:22,713 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2019-01-18 18:09:22,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2019-01-18 18:09:22,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 55. [2019-01-18 18:09:22,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2019-01-18 18:09:22,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 250 transitions. [2019-01-18 18:09:22,726 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 250 transitions. Word has length 4 [2019-01-18 18:09:22,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:09:22,726 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 250 transitions. [2019-01-18 18:09:22,726 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-18 18:09:22,726 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 250 transitions. [2019-01-18 18:09:22,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-18 18:09:22,727 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:09:22,727 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-18 18:09:22,727 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:09:22,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:09:22,728 INFO L82 PathProgramCache]: Analyzing trace with hash 945000, now seen corresponding path program 1 times [2019-01-18 18:09:22,728 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:09:22,728 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:09:22,729 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:09:22,729 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:09:22,729 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:09:22,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:09:22,797 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:09:22,797 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:09:22,797 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 18:09:22,797 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-18 18:09:22,797 INFO L207 CegarAbsIntRunner]: [0], [10], [22], [27] [2019-01-18 18:09:22,798 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-18 18:09:22,798 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 18:09:23,112 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 18:09:23,112 INFO L272 AbstractInterpreter]: Visited 4 different actions 7 times. Merged at 1 different actions 1 times. Never widened. Found 4 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-18 18:09:23,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:09:23,113 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 18:09:23,113 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:09:23,113 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 [2019-01-18 18:09:23,121 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:09:23,121 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 18:09:23,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:09:23,126 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 18:09:23,162 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 21 treesize of output 24 [2019-01-18 18:09:23,168 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 24 treesize of output 30 [2019-01-18 18:09:23,176 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:23,178 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:23,178 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 26 treesize of output 40 [2019-01-18 18:09:23,187 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:23,190 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:23,190 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:23,191 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2019-01-18 18:09:23,194 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:23,197 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:23,198 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:23,199 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:23,199 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 30 treesize of output 72 [2019-01-18 18:09:23,209 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 71 [2019-01-18 18:09:23,210 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-18 18:09:23,248 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:23,271 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:23,289 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:23,302 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:23,315 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:23,344 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:23,345 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 48 treesize of output 54 [2019-01-18 18:09:23,439 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:23,441 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:23,442 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 41 treesize of output 53 [2019-01-18 18:09:23,497 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:23,499 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:23,501 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:23,502 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:23,503 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 32 treesize of output 61 [2019-01-18 18:09:23,547 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:23,549 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:23,550 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:23,551 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:23,552 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:23,553 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:23,554 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 41 [2019-01-18 18:09:23,554 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-01-18 18:09:23,570 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:23,586 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:23,602 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:23,635 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 18:09:23,635 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 5 variables, input treesize:72, output treesize:71 [2019-01-18 18:09:23,677 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:23,678 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 72 [2019-01-18 18:09:23,678 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:09:23,708 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 18:09:23,708 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:76, output treesize:50 [2019-01-18 18:09:23,743 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:23,744 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:23,745 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:23,746 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:23,747 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:23,748 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:23,749 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:23,750 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 86 [2019-01-18 18:09:23,750 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:09:23,785 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-18 18:09:23,785 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:60, output treesize:38 [2019-01-18 18:09:23,809 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:09:23,809 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 18:09:23,833 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:09:23,852 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 18:09:23,852 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-18 18:09:23,852 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 18:09:23,852 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-18 18:09:23,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-18 18:09:23,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2019-01-18 18:09:23,853 INFO L87 Difference]: Start difference. First operand 55 states and 250 transitions. Second operand 8 states. [2019-01-18 18:09:24,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:09:24,309 INFO L93 Difference]: Finished difference Result 84 states and 299 transitions. [2019-01-18 18:09:24,309 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-18 18:09:24,309 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-18 18:09:24,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:09:24,311 INFO L225 Difference]: With dead ends: 84 [2019-01-18 18:09:24,311 INFO L226 Difference]: Without dead ends: 82 [2019-01-18 18:09:24,311 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=113, Unknown=0, NotChecked=0, Total=182 [2019-01-18 18:09:24,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2019-01-18 18:09:24,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 58. [2019-01-18 18:09:24,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-01-18 18:09:24,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 270 transitions. [2019-01-18 18:09:24,325 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 270 transitions. Word has length 4 [2019-01-18 18:09:24,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:09:24,326 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 270 transitions. [2019-01-18 18:09:24,326 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-18 18:09:24,326 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 270 transitions. [2019-01-18 18:09:24,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-18 18:09:24,327 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:09:24,327 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-18 18:09:24,327 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:09:24,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:09:24,327 INFO L82 PathProgramCache]: Analyzing trace with hash 946922, now seen corresponding path program 1 times [2019-01-18 18:09:24,327 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:09:24,328 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:09:24,328 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:09:24,328 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:09:24,329 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:09:24,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:09:24,403 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:09:24,403 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:09:24,404 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 18:09:24,404 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-18 18:09:24,404 INFO L207 CegarAbsIntRunner]: [0], [10], [24], [27] [2019-01-18 18:09:24,405 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-18 18:09:24,405 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 18:09:25,139 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 18:09:25,140 INFO L272 AbstractInterpreter]: Visited 4 different actions 10 times. Merged at 2 different actions 2 times. Never widened. Found 6 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-18 18:09:25,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:09:25,140 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 18:09:25,140 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:09:25,140 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 [2019-01-18 18:09:25,154 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:09:25,155 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 18:09:25,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:09:25,173 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 18:09:25,357 WARN L181 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2019-01-18 18:09:25,372 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 21 treesize of output 24 [2019-01-18 18:09:25,387 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 24 treesize of output 30 [2019-01-18 18:09:25,415 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:25,436 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:25,437 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 26 treesize of output 40 [2019-01-18 18:09:25,477 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:25,503 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:25,524 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:25,525 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 28 treesize of output 54 [2019-01-18 18:09:25,568 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:25,589 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:25,614 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:25,632 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:25,633 INFO L303 Elim1Store]: Index analysis took 105 ms [2019-01-18 18:09:25,634 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 30 treesize of output 72 [2019-01-18 18:09:25,672 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:25,694 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:25,721 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:25,742 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:25,768 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:25,769 INFO L303 Elim1Store]: Index analysis took 132 ms [2019-01-18 18:09:25,770 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 91 [2019-01-18 18:09:25,770 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-18 18:09:25,848 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:25,869 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:25,888 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:25,902 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:25,915 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:25,948 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:25,949 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 68 treesize of output 71 [2019-01-18 18:09:25,983 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:25,985 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:25,985 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 58 treesize of output 67 [2019-01-18 18:09:26,026 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:26,028 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:26,029 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:26,030 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:26,031 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 46 treesize of output 72 [2019-01-18 18:09:26,080 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:26,081 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:26,082 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:26,083 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:26,085 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:26,086 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:26,087 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 37 treesize of output 80 [2019-01-18 18:09:26,146 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:26,148 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:26,149 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:26,150 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:26,151 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:26,152 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:26,153 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:26,154 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:26,155 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 31 treesize of output 61 [2019-01-18 18:09:26,156 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2019-01-18 18:09:26,181 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:26,207 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:26,232 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:26,259 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:26,305 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 18:09:26,305 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 5 variables, input treesize:92, output treesize:91 [2019-01-18 18:09:26,362 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:26,362 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 41 treesize of output 97 [2019-01-18 18:09:26,363 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:09:26,407 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-18 18:09:26,408 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:101, output treesize:71 [2019-01-18 18:09:26,463 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:26,464 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:26,465 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:26,466 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:26,467 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:26,467 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:26,468 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:26,469 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 18:09:26,470 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 43 treesize of output 112 [2019-01-18 18:09:26,470 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:09:26,520 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. [2019-01-18 18:09:26,520 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:83, output treesize:59 [2019-01-18 18:09:26,539 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:09:26,540 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 18:09:26,567 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:09:26,586 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 18:09:26,586 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-18 18:09:26,586 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 18:09:26,586 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-18 18:09:26,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-18 18:09:26,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2019-01-18 18:09:26,587 INFO L87 Difference]: Start difference. First operand 58 states and 270 transitions. Second operand 8 states. [2019-01-18 18:09:27,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:09:27,314 INFO L93 Difference]: Finished difference Result 91 states and 313 transitions. [2019-01-18 18:09:27,314 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-18 18:09:27,314 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-18 18:09:27,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:09:27,316 INFO L225 Difference]: With dead ends: 91 [2019-01-18 18:09:27,316 INFO L226 Difference]: Without dead ends: 89 [2019-01-18 18:09:27,316 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2019-01-18 18:09:27,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2019-01-18 18:09:27,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 59. [2019-01-18 18:09:27,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-01-18 18:09:27,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 277 transitions. [2019-01-18 18:09:27,329 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 277 transitions. Word has length 4 [2019-01-18 18:09:27,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:09:27,330 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 277 transitions. [2019-01-18 18:09:27,330 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-18 18:09:27,330 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 277 transitions. [2019-01-18 18:09:27,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-18 18:09:27,331 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:09:27,331 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-18 18:09:27,331 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:09:27,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:09:27,331 INFO L82 PathProgramCache]: Analyzing trace with hash 934028, now seen corresponding path program 1 times [2019-01-18 18:09:27,331 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:09:27,332 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:09:27,332 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:09:27,332 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:09:27,332 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:09:27,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:09:27,385 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:09:27,385 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:09:27,385 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 18:09:27,385 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-18 18:09:27,386 INFO L207 CegarAbsIntRunner]: [0], [10], [28], [29] [2019-01-18 18:09:27,386 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-18 18:09:27,386 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 18:09:27,536 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 18:09:27,536 INFO L272 AbstractInterpreter]: Visited 4 different actions 6 times. Merged at 1 different actions 1 times. Never widened. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-18 18:09:27,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:09:27,536 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 18:09:27,537 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:09:27,537 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 [2019-01-18 18:09:27,548 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:09:27,548 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 18:09:27,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:09:27,555 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 18:09:27,560 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 21 treesize of output 24 [2019-01-18 18:09:27,566 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 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 26 [2019-01-18 18:09:27,576 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:27,578 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:27,579 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 26 treesize of output 36 [2019-01-18 18:09:27,588 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:27,590 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:27,593 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:27,594 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 28 treesize of output 50 [2019-01-18 18:09:27,604 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:27,608 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:27,610 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:27,612 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:27,613 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 68 [2019-01-18 18:09:27,629 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 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 32 treesize of output 67 [2019-01-18 18:09:27,630 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-18 18:09:27,656 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:27,677 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:27,700 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:27,711 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:27,724 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:27,748 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 43 treesize of output 39 [2019-01-18 18:09:27,763 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:27,765 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:27,766 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 36 treesize of output 49 [2019-01-18 18:09:27,796 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:27,797 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:27,799 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:27,800 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:27,801 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 32 treesize of output 57 [2019-01-18 18:09:27,839 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:27,840 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:27,841 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:27,842 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:27,843 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:27,845 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:27,846 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 37 [2019-01-18 18:09:27,847 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-01-18 18:09:27,862 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:27,876 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:27,892 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:27,923 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. [2019-01-18 18:09:27,923 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 7 variables, input treesize:64, output treesize:67 [2019-01-18 18:09:27,947 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:27,956 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 72 [2019-01-18 18:09:27,957 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-01-18 18:09:28,051 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 7 dim-0 vars, and 2 xjuncts. [2019-01-18 18:09:28,051 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:72, output treesize:92 [2019-01-18 18:09:28,099 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:09:28,100 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 18:09:28,103 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:09:28,123 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-01-18 18:09:28,123 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [2, 2] total 5 [2019-01-18 18:09:28,123 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-01-18 18:09:28,124 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-01-18 18:09:28,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-01-18 18:09:28,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2019-01-18 18:09:28,124 INFO L87 Difference]: Start difference. First operand 59 states and 277 transitions. Second operand 4 states. [2019-01-18 18:09:28,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:09:28,268 INFO L93 Difference]: Finished difference Result 90 states and 454 transitions. [2019-01-18 18:09:28,269 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-01-18 18:09:28,269 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2019-01-18 18:09:28,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:09:28,270 INFO L225 Difference]: With dead ends: 90 [2019-01-18 18:09:28,271 INFO L226 Difference]: Without dead ends: 89 [2019-01-18 18:09:28,271 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2019-01-18 18:09:28,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2019-01-18 18:09:28,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 83. [2019-01-18 18:09:28,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-01-18 18:09:28,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 449 transitions. [2019-01-18 18:09:28,291 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 449 transitions. Word has length 4 [2019-01-18 18:09:28,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:09:28,291 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 449 transitions. [2019-01-18 18:09:28,291 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-01-18 18:09:28,291 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 449 transitions. [2019-01-18 18:09:28,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-18 18:09:28,292 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:09:28,293 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-18 18:09:28,293 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:09:28,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:09:28,293 INFO L82 PathProgramCache]: Analyzing trace with hash 933592, now seen corresponding path program 1 times [2019-01-18 18:09:28,293 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:09:28,294 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:09:28,294 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:09:28,294 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:09:28,295 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:09:28,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:09:28,397 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:09:28,397 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:09:28,397 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 18:09:28,397 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-18 18:09:28,397 INFO L207 CegarAbsIntRunner]: [0], [10], [14], [27] [2019-01-18 18:09:28,398 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-18 18:09:28,399 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 18:09:28,654 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 18:09:28,654 INFO L272 AbstractInterpreter]: Visited 4 different actions 7 times. Merged at 1 different actions 1 times. Never widened. Found 4 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-18 18:09:28,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:09:28,654 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 18:09:28,654 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:09:28,654 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 [2019-01-18 18:09:28,664 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:09:28,664 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 18:09:28,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:09:28,669 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 18:09:28,696 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:28,697 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 48 treesize of output 54 [2019-01-18 18:09:28,736 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:28,738 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:28,739 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 41 treesize of output 53 [2019-01-18 18:09:28,793 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:28,795 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:28,797 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:28,799 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:28,800 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 32 treesize of output 61 [2019-01-18 18:09:28,865 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:28,866 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:28,867 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:28,868 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:28,870 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:28,871 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:28,872 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 41 [2019-01-18 18:09:28,873 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2019-01-18 18:09:28,894 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:28,915 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:28,939 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:28,970 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-01-18 18:09:28,973 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2019-01-18 18:09:28,976 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2019-01-18 18:09:28,978 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2019-01-18 18:09:28,980 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 30 treesize of output 72 [2019-01-18 18:09:29,002 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 71 [2019-01-18 18:09:29,003 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-01-18 18:09:29,027 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:29,047 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:29,062 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:29,074 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:29,085 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:29,117 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 18:09:29,117 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 5 variables, input treesize:72, output treesize:71 [2019-01-18 18:09:29,187 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:29,188 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 72 [2019-01-18 18:09:29,188 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:09:29,218 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 18:09:29,218 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:76, output treesize:50 [2019-01-18 18:09:29,239 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:29,240 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:29,241 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:29,241 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:29,242 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:29,243 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:29,244 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:29,244 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 88 [2019-01-18 18:09:29,245 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:09:29,277 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-18 18:09:29,277 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:62, output treesize:40 [2019-01-18 18:09:29,295 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:09:29,295 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 18:09:29,315 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:09:29,334 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 18:09:29,334 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-18 18:09:29,334 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 18:09:29,334 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-18 18:09:29,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-18 18:09:29,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2019-01-18 18:09:29,335 INFO L87 Difference]: Start difference. First operand 83 states and 449 transitions. Second operand 8 states. [2019-01-18 18:09:29,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:09:29,717 INFO L93 Difference]: Finished difference Result 121 states and 532 transitions. [2019-01-18 18:09:29,717 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-18 18:09:29,717 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-18 18:09:29,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:09:29,719 INFO L225 Difference]: With dead ends: 121 [2019-01-18 18:09:29,719 INFO L226 Difference]: Without dead ends: 119 [2019-01-18 18:09:29,720 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2019-01-18 18:09:29,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2019-01-18 18:09:29,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 91. [2019-01-18 18:09:29,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2019-01-18 18:09:29,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 493 transitions. [2019-01-18 18:09:29,736 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 493 transitions. Word has length 4 [2019-01-18 18:09:29,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:09:29,736 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 493 transitions. [2019-01-18 18:09:29,736 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-18 18:09:29,736 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 493 transitions. [2019-01-18 18:09:29,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-18 18:09:29,738 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:09:29,738 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-18 18:09:29,738 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:09:29,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:09:29,738 INFO L82 PathProgramCache]: Analyzing trace with hash 937872, now seen corresponding path program 1 times [2019-01-18 18:09:29,738 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:09:29,739 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:09:29,739 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:09:29,739 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:09:29,740 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:09:29,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:09:29,851 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:09:29,851 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:09:29,851 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 18:09:29,852 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-18 18:09:29,852 INFO L207 CegarAbsIntRunner]: [0], [14], [28], [29] [2019-01-18 18:09:29,853 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-18 18:09:29,853 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 18:09:30,068 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 18:09:30,069 INFO L272 AbstractInterpreter]: Visited 4 different actions 6 times. Merged at 1 different actions 1 times. Never widened. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-18 18:09:30,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:09:30,069 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 18:09:30,069 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:09:30,069 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 [2019-01-18 18:09:30,084 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:09:30,084 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 18:09:30,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:09:30,103 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 18:09:30,120 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 21 treesize of output 24 [2019-01-18 18:09:30,158 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 24 treesize of output 26 [2019-01-18 18:09:30,191 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:30,193 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:30,194 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 26 treesize of output 36 [2019-01-18 18:09:30,202 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:30,203 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:30,204 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:30,205 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 28 treesize of output 50 [2019-01-18 18:09:30,208 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:30,209 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:30,210 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:30,211 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:30,212 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 68 [2019-01-18 18:09:30,223 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 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 32 treesize of output 67 [2019-01-18 18:09:30,224 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-18 18:09:30,249 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:30,270 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:30,286 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:30,299 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:30,311 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:30,332 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 43 treesize of output 39 [2019-01-18 18:09:30,346 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:30,348 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:30,348 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 36 treesize of output 49 [2019-01-18 18:09:30,378 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:30,379 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:30,381 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:30,382 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:30,383 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 32 treesize of output 57 [2019-01-18 18:09:30,421 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:30,423 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:30,424 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:30,425 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:30,426 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:30,428 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:30,429 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 37 [2019-01-18 18:09:30,429 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-01-18 18:09:30,443 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:30,457 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:30,472 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:30,503 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. [2019-01-18 18:09:30,503 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 6 variables, input treesize:64, output treesize:67 [2019-01-18 18:09:30,559 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:30,560 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 68 [2019-01-18 18:09:30,560 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:09:30,587 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-18 18:09:30,588 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:72, output treesize:46 [2019-01-18 18:09:30,603 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:09:30,603 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 18:09:30,613 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:09:30,632 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 18:09:30,633 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-01-18 18:09:30,633 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 18:09:30,633 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-01-18 18:09:30,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-01-18 18:09:30,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-01-18 18:09:30,633 INFO L87 Difference]: Start difference. First operand 91 states and 493 transitions. Second operand 6 states. [2019-01-18 18:09:30,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:09:30,860 INFO L93 Difference]: Finished difference Result 110 states and 511 transitions. [2019-01-18 18:09:30,860 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-01-18 18:09:30,860 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 4 [2019-01-18 18:09:30,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:09:30,862 INFO L225 Difference]: With dead ends: 110 [2019-01-18 18:09:30,863 INFO L226 Difference]: Without dead ends: 109 [2019-01-18 18:09:30,863 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2019-01-18 18:09:30,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2019-01-18 18:09:30,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 91. [2019-01-18 18:09:30,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2019-01-18 18:09:30,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 493 transitions. [2019-01-18 18:09:30,876 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 493 transitions. Word has length 4 [2019-01-18 18:09:30,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:09:30,877 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 493 transitions. [2019-01-18 18:09:30,877 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-01-18 18:09:30,877 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 493 transitions. [2019-01-18 18:09:30,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-18 18:09:30,878 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:09:30,878 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1, 1] [2019-01-18 18:09:30,878 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:09:30,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:09:30,878 INFO L82 PathProgramCache]: Analyzing trace with hash 29182900, now seen corresponding path program 2 times [2019-01-18 18:09:30,879 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:09:30,879 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:09:30,879 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:09:30,879 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:09:30,880 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:09:30,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:09:30,968 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:09:30,968 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:09:30,968 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 18:09:30,968 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-18 18:09:30,969 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-18 18:09:30,969 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:09:30,969 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 [2019-01-18 18:09:30,978 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-01-18 18:09:30,979 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-01-18 18:09:30,987 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-01-18 18:09:30,987 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-18 18:09:30,988 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 18:09:31,019 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 21 treesize of output 24 [2019-01-18 18:09:31,022 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 24 treesize of output 30 [2019-01-18 18:09:31,055 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:31,056 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:31,057 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 26 treesize of output 40 [2019-01-18 18:09:31,063 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:31,064 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:31,065 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:31,066 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 28 treesize of output 54 [2019-01-18 18:09:31,070 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:31,071 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:31,073 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:31,074 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:31,075 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 30 treesize of output 72 [2019-01-18 18:09:31,096 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:31,098 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:31,101 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:31,103 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:31,104 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:31,106 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 91 [2019-01-18 18:09:31,107 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-18 18:09:31,181 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:31,288 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:31,307 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:31,322 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:31,335 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:31,369 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:31,370 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 68 treesize of output 71 [2019-01-18 18:09:31,410 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:31,411 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:31,412 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 58 treesize of output 67 [2019-01-18 18:09:31,455 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:31,456 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:31,457 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:31,458 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:31,459 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2019-01-18 18:09:31,511 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:31,513 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:31,514 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:31,515 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:31,516 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:31,517 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:31,518 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 37 treesize of output 80 [2019-01-18 18:09:31,579 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:31,580 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:31,581 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:31,582 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:31,583 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:31,585 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:31,586 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:31,587 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:31,588 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 31 treesize of output 61 [2019-01-18 18:09:31,588 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2019-01-18 18:09:31,611 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:31,637 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:31,663 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:31,689 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:31,736 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. [2019-01-18 18:09:31,737 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 6 variables, input treesize:92, output treesize:91 [2019-01-18 18:09:31,756 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:31,757 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 41 treesize of output 91 [2019-01-18 18:09:31,757 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:09:31,803 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-18 18:09:31,804 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:101, output treesize:71 [2019-01-18 18:09:31,822 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:31,823 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:31,824 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:31,825 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:31,826 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:31,827 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:31,829 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:31,830 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:31,831 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 43 treesize of output 103 [2019-01-18 18:09:31,832 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:09:31,878 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. [2019-01-18 18:09:31,879 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:83, output treesize:71 [2019-01-18 18:09:31,918 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:31,921 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:31,922 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:31,924 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:31,925 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:31,926 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:31,926 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:31,927 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:31,928 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 43 treesize of output 113 [2019-01-18 18:09:31,929 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:09:31,983 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. [2019-01-18 18:09:31,983 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:83, output treesize:57 [2019-01-18 18:09:32,204 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:09:32,204 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 18:09:32,675 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:09:32,737 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 18:09:32,737 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2019-01-18 18:09:32,737 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 18:09:32,738 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-01-18 18:09:32,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-01-18 18:09:32,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2019-01-18 18:09:32,739 INFO L87 Difference]: Start difference. First operand 91 states and 493 transitions. Second operand 10 states. [2019-01-18 18:09:33,697 WARN L181 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 51 [2019-01-18 18:09:34,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:09:34,371 INFO L93 Difference]: Finished difference Result 133 states and 606 transitions. [2019-01-18 18:09:34,371 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-01-18 18:09:34,372 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2019-01-18 18:09:34,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:09:34,374 INFO L225 Difference]: With dead ends: 133 [2019-01-18 18:09:34,374 INFO L226 Difference]: Without dead ends: 128 [2019-01-18 18:09:34,374 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=73, Invalid=109, Unknown=0, NotChecked=0, Total=182 [2019-01-18 18:09:34,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2019-01-18 18:09:34,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 95. [2019-01-18 18:09:34,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2019-01-18 18:09:34,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 538 transitions. [2019-01-18 18:09:34,391 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 538 transitions. Word has length 5 [2019-01-18 18:09:34,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:09:34,392 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 538 transitions. [2019-01-18 18:09:34,392 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-01-18 18:09:34,392 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 538 transitions. [2019-01-18 18:09:34,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-18 18:09:34,393 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:09:34,393 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-01-18 18:09:34,393 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:09:34,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:09:34,393 INFO L82 PathProgramCache]: Analyzing trace with hash 29172052, now seen corresponding path program 1 times [2019-01-18 18:09:34,394 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:09:34,394 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:09:34,394 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-18 18:09:34,394 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:09:34,395 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:09:34,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:09:34,520 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:09:34,521 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:09:34,521 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 18:09:34,521 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-01-18 18:09:34,521 INFO L207 CegarAbsIntRunner]: [0], [6], [18], [28], [29] [2019-01-18 18:09:34,523 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-18 18:09:34,523 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 18:09:34,768 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 18:09:34,768 INFO L272 AbstractInterpreter]: Visited 5 different actions 8 times. Merged at 1 different actions 1 times. Never widened. Found 4 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-18 18:09:34,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:09:34,768 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 18:09:34,768 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:09:34,768 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 [2019-01-18 18:09:34,778 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:09:34,779 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 18:09:34,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:09:34,788 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 18:09:34,808 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 21 treesize of output 24 [2019-01-18 18:09:34,811 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 24 treesize of output 30 [2019-01-18 18:09:34,814 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:34,817 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:34,817 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 26 treesize of output 40 [2019-01-18 18:09:34,822 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:34,824 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:34,827 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:34,827 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 28 treesize of output 54 [2019-01-18 18:09:34,834 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:34,837 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:34,840 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:34,842 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:34,843 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 30 treesize of output 72 [2019-01-18 18:09:34,888 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 71 [2019-01-18 18:09:34,889 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-18 18:09:34,919 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:34,941 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:34,959 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:34,973 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:34,986 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:35,014 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:35,015 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 48 treesize of output 54 [2019-01-18 18:09:35,050 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:35,051 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:35,052 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 41 treesize of output 53 [2019-01-18 18:09:35,086 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:35,087 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:35,089 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:35,090 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:35,091 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 32 treesize of output 61 [2019-01-18 18:09:35,133 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:35,135 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:35,136 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:35,137 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:35,138 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:35,139 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:35,140 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 41 [2019-01-18 18:09:35,140 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-01-18 18:09:35,156 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:35,172 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:35,188 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:35,220 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 18:09:35,220 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 5 variables, input treesize:72, output treesize:71 [2019-01-18 18:09:35,258 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:35,258 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 66 [2019-01-18 18:09:35,259 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:09:35,284 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 18:09:35,285 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:76, output treesize:50 [2019-01-18 18:09:35,304 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:35,305 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:35,305 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:35,306 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:35,307 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:35,308 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:35,309 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:35,310 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 88 [2019-01-18 18:09:35,310 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:09:35,343 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-18 18:09:35,344 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:62, output treesize:40 [2019-01-18 18:09:35,409 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:09:35,409 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 18:09:35,429 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:09:35,448 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 18:09:35,449 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-18 18:09:35,449 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 18:09:35,449 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-18 18:09:35,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-18 18:09:35,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2019-01-18 18:09:35,450 INFO L87 Difference]: Start difference. First operand 95 states and 538 transitions. Second operand 8 states. [2019-01-18 18:09:35,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:09:35,796 INFO L93 Difference]: Finished difference Result 125 states and 622 transitions. [2019-01-18 18:09:35,797 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-18 18:09:35,797 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 5 [2019-01-18 18:09:35,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:09:35,799 INFO L225 Difference]: With dead ends: 125 [2019-01-18 18:09:35,799 INFO L226 Difference]: Without dead ends: 124 [2019-01-18 18:09:35,800 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2019-01-18 18:09:35,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2019-01-18 18:09:35,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 102. [2019-01-18 18:09:35,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2019-01-18 18:09:35,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 589 transitions. [2019-01-18 18:09:35,821 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 589 transitions. Word has length 5 [2019-01-18 18:09:35,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:09:35,821 INFO L480 AbstractCegarLoop]: Abstraction has 102 states and 589 transitions. [2019-01-18 18:09:35,821 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-18 18:09:35,821 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 589 transitions. [2019-01-18 18:09:35,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-18 18:09:35,822 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:09:35,822 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-01-18 18:09:35,822 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:09:35,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:09:35,823 INFO L82 PathProgramCache]: Analyzing trace with hash 29187302, now seen corresponding path program 1 times [2019-01-18 18:09:35,823 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:09:35,823 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:09:35,824 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:09:35,824 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:09:35,824 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:09:35,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:09:36,008 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:09:36,008 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:09:36,009 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 18:09:36,009 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-01-18 18:09:36,009 INFO L207 CegarAbsIntRunner]: [0], [18], [22], [24], [27] [2019-01-18 18:09:36,010 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-18 18:09:36,010 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 18:09:36,371 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 18:09:36,372 INFO L272 AbstractInterpreter]: Visited 5 different actions 9 times. Merged at 1 different actions 1 times. Never widened. Found 6 fixpoints after 4 different actions. Largest state had 0 variables. [2019-01-18 18:09:36,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:09:36,372 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 18:09:36,372 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:09:36,372 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 [2019-01-18 18:09:36,381 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:09:36,381 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 18:09:36,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:09:36,387 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 18:09:36,420 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:36,421 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 68 treesize of output 71 [2019-01-18 18:09:36,469 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:36,470 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:36,470 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 58 treesize of output 67 [2019-01-18 18:09:36,511 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:36,513 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:36,514 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:36,515 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:36,516 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 46 treesize of output 72 [2019-01-18 18:09:36,566 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:36,567 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:36,568 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:36,570 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:36,571 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:36,572 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:36,573 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 37 treesize of output 80 [2019-01-18 18:09:36,640 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:36,641 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:36,642 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:36,644 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:36,645 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:36,646 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:36,647 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:36,648 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:36,649 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 31 treesize of output 61 [2019-01-18 18:09:36,650 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2019-01-18 18:09:36,676 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:36,705 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:36,731 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:36,758 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:36,795 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-01-18 18:09:36,798 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2019-01-18 18:09:36,802 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2019-01-18 18:09:36,805 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 14 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2019-01-18 18:09:36,809 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 15 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2019-01-18 18:09:36,811 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 91 [2019-01-18 18:09:36,812 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2019-01-18 18:09:36,844 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:36,864 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:36,880 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:36,893 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:36,905 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:36,949 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-01-18 18:09:36,950 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 4 variables, input treesize:92, output treesize:91 [2019-01-18 18:09:36,986 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:36,987 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 41 treesize of output 91 [2019-01-18 18:09:36,987 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:09:37,030 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 18:09:37,031 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:101, output treesize:71 [2019-01-18 18:09:37,061 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:37,062 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:37,063 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:37,064 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:37,065 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:37,066 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:37,067 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:37,068 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:37,069 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 43 treesize of output 105 [2019-01-18 18:09:37,070 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:09:37,112 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-18 18:09:37,112 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:83, output treesize:57 [2019-01-18 18:09:37,139 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:37,140 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:37,141 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:37,142 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:37,143 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:37,144 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:37,145 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:37,146 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:37,147 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:37,148 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:37,149 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:37,150 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 18:09:37,151 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:37,152 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 43 treesize of output 118 [2019-01-18 18:09:37,153 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:09:37,201 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. [2019-01-18 18:09:37,202 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:67, output treesize:47 [2019-01-18 18:09:37,224 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:09:37,225 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 18:09:37,267 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:09:37,286 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 18:09:37,286 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2019-01-18 18:09:37,287 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 18:09:37,287 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-01-18 18:09:37,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-01-18 18:09:37,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2019-01-18 18:09:37,287 INFO L87 Difference]: Start difference. First operand 102 states and 589 transitions. Second operand 10 states. [2019-01-18 18:09:38,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:09:38,880 INFO L93 Difference]: Finished difference Result 149 states and 665 transitions. [2019-01-18 18:09:38,880 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-01-18 18:09:38,880 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2019-01-18 18:09:38,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:09:38,882 INFO L225 Difference]: With dead ends: 149 [2019-01-18 18:09:38,882 INFO L226 Difference]: Without dead ends: 145 [2019-01-18 18:09:38,883 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=88, Invalid=152, Unknown=0, NotChecked=0, Total=240 [2019-01-18 18:09:38,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2019-01-18 18:09:38,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 105. [2019-01-18 18:09:38,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2019-01-18 18:09:38,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 605 transitions. [2019-01-18 18:09:38,903 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 605 transitions. Word has length 5 [2019-01-18 18:09:38,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:09:38,903 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 605 transitions. [2019-01-18 18:09:38,903 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-01-18 18:09:38,903 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 605 transitions. [2019-01-18 18:09:38,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-18 18:09:38,904 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:09:38,904 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-01-18 18:09:38,904 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:09:38,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:09:38,905 INFO L82 PathProgramCache]: Analyzing trace with hash 29186868, now seen corresponding path program 1 times [2019-01-18 18:09:38,905 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:09:38,905 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:09:38,906 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:09:38,906 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:09:38,906 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:09:38,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:09:39,056 WARN L181 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2019-01-18 18:09:39,099 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:09:39,100 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:09:39,100 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 18:09:39,100 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-01-18 18:09:39,100 INFO L207 CegarAbsIntRunner]: [0], [10], [18], [22], [27] [2019-01-18 18:09:39,102 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-18 18:09:39,102 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 18:09:39,663 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 18:09:39,663 INFO L272 AbstractInterpreter]: Visited 5 different actions 9 times. Merged at 1 different actions 1 times. Never widened. Found 6 fixpoints after 4 different actions. Largest state had 0 variables. [2019-01-18 18:09:39,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:09:39,663 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 18:09:39,664 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:09:39,664 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 [2019-01-18 18:09:39,680 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:09:39,680 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 18:09:39,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:09:39,699 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 18:09:39,743 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 21 treesize of output 24 [2019-01-18 18:09:39,746 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 24 treesize of output 30 [2019-01-18 18:09:39,754 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:39,754 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:39,755 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 26 treesize of output 40 [2019-01-18 18:09:39,759 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:39,760 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:39,762 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:39,763 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 28 treesize of output 54 [2019-01-18 18:09:39,771 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:39,772 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:39,773 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:39,774 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:39,775 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 30 treesize of output 72 [2019-01-18 18:09:39,782 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 71 [2019-01-18 18:09:39,783 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-18 18:09:39,812 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:39,834 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:39,851 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:39,866 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:39,878 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:39,907 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:39,908 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 48 treesize of output 54 [2019-01-18 18:09:39,939 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:39,940 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:39,940 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 41 treesize of output 53 [2019-01-18 18:09:39,975 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:39,977 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:39,978 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:39,979 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:39,980 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 32 treesize of output 61 [2019-01-18 18:09:40,023 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:40,024 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:40,025 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:40,026 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:40,027 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:40,028 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:40,029 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 41 [2019-01-18 18:09:40,030 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-01-18 18:09:40,047 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:40,062 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:40,078 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:40,111 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-01-18 18:09:40,111 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 4 variables, input treesize:72, output treesize:71 [2019-01-18 18:09:40,164 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:40,165 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 66 [2019-01-18 18:09:40,165 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:09:40,192 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-01-18 18:09:40,192 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:76, output treesize:50 [2019-01-18 18:09:40,219 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:40,220 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:40,222 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:40,223 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:40,224 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:40,225 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:40,226 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:40,227 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 80 [2019-01-18 18:09:40,228 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:09:40,257 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 18:09:40,257 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:62, output treesize:40 [2019-01-18 18:09:40,280 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:40,281 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:40,282 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:40,282 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:40,283 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:40,285 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:40,286 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:40,287 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:40,288 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:40,288 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 18:09:40,289 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:40,290 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 97 [2019-01-18 18:09:40,291 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:09:40,325 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-18 18:09:40,325 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:50, output treesize:34 [2019-01-18 18:09:40,344 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:09:40,345 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 18:09:40,384 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:09:40,402 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 18:09:40,403 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2019-01-18 18:09:40,403 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 18:09:40,403 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-01-18 18:09:40,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-01-18 18:09:40,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2019-01-18 18:09:40,403 INFO L87 Difference]: Start difference. First operand 105 states and 605 transitions. Second operand 10 states. [2019-01-18 18:09:40,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:09:40,944 INFO L93 Difference]: Finished difference Result 138 states and 662 transitions. [2019-01-18 18:09:40,945 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-01-18 18:09:40,945 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2019-01-18 18:09:40,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:09:40,947 INFO L225 Difference]: With dead ends: 138 [2019-01-18 18:09:40,948 INFO L226 Difference]: Without dead ends: 136 [2019-01-18 18:09:40,948 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=99, Invalid=173, Unknown=0, NotChecked=0, Total=272 [2019-01-18 18:09:40,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2019-01-18 18:09:40,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 104. [2019-01-18 18:09:40,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2019-01-18 18:09:40,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 598 transitions. [2019-01-18 18:09:40,968 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 598 transitions. Word has length 5 [2019-01-18 18:09:40,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:09:40,968 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 598 transitions. [2019-01-18 18:09:40,968 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-01-18 18:09:40,968 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 598 transitions. [2019-01-18 18:09:40,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-18 18:09:40,969 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:09:40,969 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-01-18 18:09:40,969 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:09:40,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:09:40,970 INFO L82 PathProgramCache]: Analyzing trace with hash 29188666, now seen corresponding path program 1 times [2019-01-18 18:09:40,970 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:09:40,970 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:09:40,970 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:09:40,971 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:09:40,971 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:09:40,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:09:41,326 WARN L181 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 17 [2019-01-18 18:09:41,646 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:09:41,646 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:09:41,647 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 18:09:41,647 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-01-18 18:09:41,647 INFO L207 CegarAbsIntRunner]: [0], [6], [18], [24], [27] [2019-01-18 18:09:41,649 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-18 18:09:41,649 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 18:09:41,991 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 18:09:41,991 INFO L272 AbstractInterpreter]: Visited 5 different actions 9 times. Merged at 1 different actions 1 times. Never widened. Found 6 fixpoints after 4 different actions. Largest state had 0 variables. [2019-01-18 18:09:41,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:09:41,991 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 18:09:41,992 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:09:41,992 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 [2019-01-18 18:09:41,999 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:09:42,000 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 18:09:42,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:09:42,007 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 18:09:42,041 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:42,041 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 68 treesize of output 71 [2019-01-18 18:09:42,087 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:42,089 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:42,090 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 58 treesize of output 67 [2019-01-18 18:09:42,131 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:42,132 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:42,133 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:42,133 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:42,134 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 46 treesize of output 72 [2019-01-18 18:09:42,185 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:42,186 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:42,187 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:42,189 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:42,190 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:42,191 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:42,192 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 37 treesize of output 80 [2019-01-18 18:09:42,259 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:42,260 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:42,261 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:42,261 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:42,262 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:42,263 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:42,264 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:42,265 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:42,266 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 31 treesize of output 61 [2019-01-18 18:09:42,267 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2019-01-18 18:09:42,294 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:42,321 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:42,374 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:42,401 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:42,438 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-01-18 18:09:42,441 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2019-01-18 18:09:42,444 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2019-01-18 18:09:42,446 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 14 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2019-01-18 18:09:42,450 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 15 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2019-01-18 18:09:42,453 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 91 [2019-01-18 18:09:42,453 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2019-01-18 18:09:42,488 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:42,508 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:42,525 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:42,538 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:42,550 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:42,595 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 18:09:42,596 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 5 variables, input treesize:92, output treesize:91 [2019-01-18 18:09:42,622 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:42,622 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 41 treesize of output 91 [2019-01-18 18:09:42,623 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:09:42,664 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-18 18:09:42,665 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:101, output treesize:71 [2019-01-18 18:09:42,688 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:42,689 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:42,690 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:42,691 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:42,692 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:42,693 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:42,694 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 18:09:42,695 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 43 treesize of output 106 [2019-01-18 18:09:42,695 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:09:42,737 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. [2019-01-18 18:09:42,737 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:83, output treesize:59 [2019-01-18 18:09:42,760 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:42,761 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:42,762 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:42,763 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:42,764 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:42,765 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:42,766 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:42,767 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:42,768 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:42,769 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:42,770 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:42,771 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 45 treesize of output 115 [2019-01-18 18:09:42,772 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:09:42,850 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. [2019-01-18 18:09:42,851 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:73, output treesize:51 [2019-01-18 18:09:42,867 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:09:42,867 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 18:09:42,891 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:09:42,912 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 18:09:42,912 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2019-01-18 18:09:42,912 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 18:09:42,912 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-01-18 18:09:42,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-01-18 18:09:42,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2019-01-18 18:09:42,913 INFO L87 Difference]: Start difference. First operand 104 states and 598 transitions. Second operand 10 states. [2019-01-18 18:09:43,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:09:43,548 INFO L93 Difference]: Finished difference Result 152 states and 738 transitions. [2019-01-18 18:09:43,549 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-01-18 18:09:43,549 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2019-01-18 18:09:43,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:09:43,552 INFO L225 Difference]: With dead ends: 152 [2019-01-18 18:09:43,552 INFO L226 Difference]: Without dead ends: 151 [2019-01-18 18:09:43,553 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=83, Invalid=127, Unknown=0, NotChecked=0, Total=210 [2019-01-18 18:09:43,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2019-01-18 18:09:43,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 106. [2019-01-18 18:09:43,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2019-01-18 18:09:43,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 612 transitions. [2019-01-18 18:09:43,573 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 612 transitions. Word has length 5 [2019-01-18 18:09:43,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:09:43,574 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 612 transitions. [2019-01-18 18:09:43,574 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-01-18 18:09:43,574 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 612 transitions. [2019-01-18 18:09:43,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-18 18:09:43,575 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:09:43,575 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-01-18 18:09:43,575 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:09:43,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:09:43,575 INFO L82 PathProgramCache]: Analyzing trace with hash 29188790, now seen corresponding path program 1 times [2019-01-18 18:09:43,575 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:09:43,576 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:09:43,576 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:09:43,576 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:09:43,576 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:09:43,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:09:43,734 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:09:43,734 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:09:43,734 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 18:09:43,734 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-01-18 18:09:43,735 INFO L207 CegarAbsIntRunner]: [0], [10], [18], [24], [27] [2019-01-18 18:09:43,736 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-18 18:09:43,736 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 18:09:44,036 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 18:09:44,036 INFO L272 AbstractInterpreter]: Visited 5 different actions 9 times. Merged at 1 different actions 1 times. Never widened. Found 6 fixpoints after 4 different actions. Largest state had 0 variables. [2019-01-18 18:09:44,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:09:44,037 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 18:09:44,037 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:09:44,037 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 [2019-01-18 18:09:44,045 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:09:44,045 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 18:09:44,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:09:44,051 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 18:09:44,086 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:44,087 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 68 treesize of output 71 [2019-01-18 18:09:44,145 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:44,147 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:44,147 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 58 treesize of output 67 [2019-01-18 18:09:44,219 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:44,220 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:44,221 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:44,223 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:44,224 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 46 treesize of output 72 [2019-01-18 18:09:44,294 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:44,296 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:44,297 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:44,299 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:44,301 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:44,303 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:44,304 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 37 treesize of output 80 [2019-01-18 18:09:44,368 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:44,369 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:44,371 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:44,372 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:44,374 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:44,376 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:44,377 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:44,378 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:44,379 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 31 treesize of output 61 [2019-01-18 18:09:44,380 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2019-01-18 18:09:44,411 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:44,443 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:44,471 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:44,503 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:44,545 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-01-18 18:09:44,548 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2019-01-18 18:09:44,551 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2019-01-18 18:09:44,555 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 14 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2019-01-18 18:09:44,558 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 15 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2019-01-18 18:09:44,562 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 91 [2019-01-18 18:09:44,563 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2019-01-18 18:09:44,599 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:44,619 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:44,635 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:44,649 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:44,660 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:44,705 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-01-18 18:09:44,706 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 4 variables, input treesize:92, output treesize:91 [2019-01-18 18:09:44,742 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:44,742 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 41 treesize of output 91 [2019-01-18 18:09:44,743 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:09:44,785 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 18:09:44,786 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:101, output treesize:71 [2019-01-18 18:09:44,816 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:44,817 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:44,818 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:44,819 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:44,820 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:44,821 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:44,822 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 18:09:44,823 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 43 treesize of output 106 [2019-01-18 18:09:44,824 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:09:44,868 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-18 18:09:44,869 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:83, output treesize:59 [2019-01-18 18:09:44,895 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:44,897 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:44,898 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:44,899 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:44,900 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:44,902 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:44,903 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:44,904 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:44,905 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:44,906 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 18:09:44,907 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 45 treesize of output 108 [2019-01-18 18:09:44,907 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:09:45,109 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. [2019-01-18 18:09:45,109 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:73, output treesize:57 [2019-01-18 18:09:46,513 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:09:46,513 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 18:09:46,551 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:09:46,571 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 18:09:46,571 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2019-01-18 18:09:46,571 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 18:09:46,572 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-01-18 18:09:46,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-01-18 18:09:46,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2019-01-18 18:09:46,572 INFO L87 Difference]: Start difference. First operand 106 states and 612 transitions. Second operand 10 states. [2019-01-18 18:09:47,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:09:47,281 INFO L93 Difference]: Finished difference Result 141 states and 665 transitions. [2019-01-18 18:09:47,281 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-01-18 18:09:47,281 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2019-01-18 18:09:47,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:09:47,283 INFO L225 Difference]: With dead ends: 141 [2019-01-18 18:09:47,284 INFO L226 Difference]: Without dead ends: 140 [2019-01-18 18:09:47,284 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=100, Invalid=172, Unknown=0, NotChecked=0, Total=272 [2019-01-18 18:09:47,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2019-01-18 18:09:47,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 107. [2019-01-18 18:09:47,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2019-01-18 18:09:47,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 619 transitions. [2019-01-18 18:09:47,305 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 619 transitions. Word has length 5 [2019-01-18 18:09:47,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:09:47,305 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 619 transitions. [2019-01-18 18:09:47,305 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-01-18 18:09:47,305 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 619 transitions. [2019-01-18 18:09:47,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-18 18:09:47,306 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:09:47,306 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-01-18 18:09:47,306 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:09:47,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:09:47,307 INFO L82 PathProgramCache]: Analyzing trace with hash 29175212, now seen corresponding path program 1 times [2019-01-18 18:09:47,307 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:09:47,307 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:09:47,308 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:09:47,308 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:09:47,308 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:09:47,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:09:47,419 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:09:47,419 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:09:47,419 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 18:09:47,420 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-01-18 18:09:47,420 INFO L207 CegarAbsIntRunner]: [0], [6], [10], [18], [27] [2019-01-18 18:09:47,424 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-18 18:09:47,424 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 18:09:48,020 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 18:09:48,021 INFO L272 AbstractInterpreter]: Visited 5 different actions 9 times. Merged at 1 different actions 1 times. Never widened. Found 6 fixpoints after 4 different actions. Largest state had 0 variables. [2019-01-18 18:09:48,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:09:48,021 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 18:09:48,021 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:09:48,021 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 [2019-01-18 18:09:48,033 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:09:48,033 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 18:09:48,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:09:48,052 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 18:09:48,215 WARN L181 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2019-01-18 18:09:48,229 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 21 treesize of output 24 [2019-01-18 18:09:48,249 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 24 treesize of output 30 [2019-01-18 18:09:48,289 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:48,313 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:48,314 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 26 treesize of output 40 [2019-01-18 18:09:48,349 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:48,366 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:48,387 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:48,388 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 28 treesize of output 54 [2019-01-18 18:09:48,417 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:48,419 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:48,421 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:48,423 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:48,424 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 30 treesize of output 72 [2019-01-18 18:09:48,433 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 71 [2019-01-18 18:09:48,434 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-18 18:09:48,463 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:48,485 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:48,503 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:48,518 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:48,530 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:48,561 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:48,562 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 48 treesize of output 54 [2019-01-18 18:09:48,595 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:48,596 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:48,597 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 41 treesize of output 53 [2019-01-18 18:09:48,630 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:48,632 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:48,633 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:48,634 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:48,635 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 32 treesize of output 61 [2019-01-18 18:09:48,679 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:48,681 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:48,682 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:48,683 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:48,684 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:48,685 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:48,686 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 41 [2019-01-18 18:09:48,686 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-01-18 18:09:48,703 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:48,719 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:48,735 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:48,768 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 18:09:48,769 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 5 variables, input treesize:72, output treesize:71 [2019-01-18 18:09:48,808 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:48,809 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 66 [2019-01-18 18:09:48,809 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:09:48,838 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 18:09:48,838 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:76, output treesize:50 [2019-01-18 18:09:48,859 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:48,860 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:48,860 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:48,861 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:48,862 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:48,863 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 18:09:48,864 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 81 [2019-01-18 18:09:48,864 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:09:48,952 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-18 18:09:48,953 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:62, output treesize:42 [2019-01-18 18:09:48,984 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:48,986 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:48,988 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:48,990 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:48,992 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:48,994 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:48,996 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:48,999 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:49,002 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:49,002 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 90 [2019-01-18 18:09:49,003 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:09:49,053 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-18 18:09:49,054 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:56, output treesize:38 [2019-01-18 18:09:49,074 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:09:49,074 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 18:09:49,130 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:09:49,148 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 18:09:49,148 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2019-01-18 18:09:49,148 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 18:09:49,148 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-01-18 18:09:49,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-01-18 18:09:49,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2019-01-18 18:09:49,149 INFO L87 Difference]: Start difference. First operand 107 states and 619 transitions. Second operand 10 states. [2019-01-18 18:09:49,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:09:49,898 INFO L93 Difference]: Finished difference Result 163 states and 816 transitions. [2019-01-18 18:09:49,898 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-01-18 18:09:49,898 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2019-01-18 18:09:49,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:09:49,901 INFO L225 Difference]: With dead ends: 163 [2019-01-18 18:09:49,901 INFO L226 Difference]: Without dead ends: 162 [2019-01-18 18:09:49,902 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=83, Invalid=127, Unknown=0, NotChecked=0, Total=210 [2019-01-18 18:09:49,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2019-01-18 18:09:49,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 116. [2019-01-18 18:09:49,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2019-01-18 18:09:49,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 682 transitions. [2019-01-18 18:09:49,925 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 682 transitions. Word has length 5 [2019-01-18 18:09:49,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:09:49,926 INFO L480 AbstractCegarLoop]: Abstraction has 116 states and 682 transitions. [2019-01-18 18:09:49,926 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-01-18 18:09:49,926 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 682 transitions. [2019-01-18 18:09:49,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-18 18:09:49,927 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:09:49,927 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-01-18 18:09:49,927 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:09:49,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:09:49,927 INFO L82 PathProgramCache]: Analyzing trace with hash 29179614, now seen corresponding path program 1 times [2019-01-18 18:09:49,927 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:09:49,928 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:09:49,928 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:09:49,928 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:09:49,928 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:09:49,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:09:50,078 WARN L181 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2019-01-18 18:09:50,163 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:09:50,163 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:09:50,163 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 18:09:50,163 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-01-18 18:09:50,163 INFO L207 CegarAbsIntRunner]: [0], [14], [18], [24], [27] [2019-01-18 18:09:50,164 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-18 18:09:50,164 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 18:09:50,452 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 18:09:50,452 INFO L272 AbstractInterpreter]: Visited 5 different actions 9 times. Merged at 1 different actions 1 times. Never widened. Found 6 fixpoints after 4 different actions. Largest state had 0 variables. [2019-01-18 18:09:50,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:09:50,452 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 18:09:50,453 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:09:50,453 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 [2019-01-18 18:09:50,461 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:09:50,461 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 18:09:50,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:09:50,467 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 18:09:50,503 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:50,503 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 68 treesize of output 71 [2019-01-18 18:09:50,545 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:50,547 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:50,547 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 58 treesize of output 67 [2019-01-18 18:09:50,591 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:50,593 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:50,594 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:50,595 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:50,596 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 46 treesize of output 72 [2019-01-18 18:09:50,647 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:50,648 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:50,649 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:50,650 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:50,651 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:50,652 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:50,653 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 37 treesize of output 80 [2019-01-18 18:09:50,786 WARN L181 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 36 [2019-01-18 18:09:50,790 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:50,791 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:50,792 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:50,792 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:50,793 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:50,794 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:50,796 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:50,797 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:50,798 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 31 treesize of output 61 [2019-01-18 18:09:50,798 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2019-01-18 18:09:50,825 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:50,852 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:50,878 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:50,906 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:50,941 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-01-18 18:09:50,944 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2019-01-18 18:09:50,947 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2019-01-18 18:09:50,949 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 14 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2019-01-18 18:09:50,952 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 15 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2019-01-18 18:09:50,954 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 91 [2019-01-18 18:09:50,955 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2019-01-18 18:09:50,990 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:51,011 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:51,027 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:51,040 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:51,052 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:51,098 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-01-18 18:09:51,098 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 4 variables, input treesize:92, output treesize:91 [2019-01-18 18:09:51,155 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:51,156 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 41 treesize of output 91 [2019-01-18 18:09:51,157 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:09:51,198 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 18:09:51,198 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:101, output treesize:71 [2019-01-18 18:09:51,228 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:51,229 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:51,230 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:51,231 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:51,232 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:51,233 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:51,234 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:51,235 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:51,236 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 43 treesize of output 113 [2019-01-18 18:09:51,236 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:09:51,283 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-18 18:09:51,283 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:83, output treesize:57 [2019-01-18 18:09:51,309 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:51,309 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:51,310 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:51,311 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:51,312 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:51,313 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:51,314 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:51,315 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:51,316 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:51,317 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:51,318 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:51,319 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 18:09:51,320 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:51,321 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 43 treesize of output 122 [2019-01-18 18:09:51,321 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:09:51,370 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. [2019-01-18 18:09:51,371 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:67, output treesize:47 [2019-01-18 18:09:51,395 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:09:51,395 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 18:09:51,434 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:09:51,452 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 18:09:51,452 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2019-01-18 18:09:51,452 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 18:09:51,453 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-01-18 18:09:51,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-01-18 18:09:51,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2019-01-18 18:09:51,453 INFO L87 Difference]: Start difference. First operand 116 states and 682 transitions. Second operand 10 states. [2019-01-18 18:09:52,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:09:52,136 INFO L93 Difference]: Finished difference Result 163 states and 796 transitions. [2019-01-18 18:09:52,136 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-01-18 18:09:52,136 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2019-01-18 18:09:52,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:09:52,139 INFO L225 Difference]: With dead ends: 163 [2019-01-18 18:09:52,139 INFO L226 Difference]: Without dead ends: 160 [2019-01-18 18:09:52,140 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=99, Invalid=173, Unknown=0, NotChecked=0, Total=272 [2019-01-18 18:09:52,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2019-01-18 18:09:52,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 122. [2019-01-18 18:09:52,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2019-01-18 18:09:52,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 724 transitions. [2019-01-18 18:09:52,159 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 724 transitions. Word has length 5 [2019-01-18 18:09:52,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:09:52,159 INFO L480 AbstractCegarLoop]: Abstraction has 122 states and 724 transitions. [2019-01-18 18:09:52,159 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-01-18 18:09:52,159 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 724 transitions. [2019-01-18 18:09:52,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-18 18:09:52,159 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:09:52,159 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-01-18 18:09:52,160 INFO L423 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:09:52,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:09:52,160 INFO L82 PathProgramCache]: Analyzing trace with hash 29179180, now seen corresponding path program 1 times [2019-01-18 18:09:52,160 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:09:52,160 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:09:52,161 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:09:52,161 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:09:52,161 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:09:52,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:09:52,318 WARN L181 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 21 [2019-01-18 18:09:52,355 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:09:52,356 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:09:52,356 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 18:09:52,356 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-01-18 18:09:52,356 INFO L207 CegarAbsIntRunner]: [0], [10], [14], [18], [27] [2019-01-18 18:09:52,357 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-18 18:09:52,358 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 18:09:52,663 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 18:09:52,663 INFO L272 AbstractInterpreter]: Visited 5 different actions 9 times. Merged at 1 different actions 1 times. Never widened. Found 6 fixpoints after 4 different actions. Largest state had 0 variables. [2019-01-18 18:09:52,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:09:52,664 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 18:09:52,664 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:09:52,664 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 [2019-01-18 18:09:52,674 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:09:52,674 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 18:09:52,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:09:52,692 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 18:09:52,732 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:52,733 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 48 treesize of output 54 [2019-01-18 18:09:52,764 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:52,765 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:52,766 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 41 treesize of output 53 [2019-01-18 18:09:52,801 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:52,803 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:52,804 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:52,805 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:52,805 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 32 treesize of output 61 [2019-01-18 18:09:52,848 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:52,849 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:52,851 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:52,852 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:52,853 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:52,854 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:52,855 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 41 [2019-01-18 18:09:52,855 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2019-01-18 18:09:52,870 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:52,886 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:52,901 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:52,925 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-01-18 18:09:52,928 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2019-01-18 18:09:52,931 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2019-01-18 18:09:52,934 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2019-01-18 18:09:52,938 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 30 treesize of output 72 [2019-01-18 18:09:52,944 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 71 [2019-01-18 18:09:52,944 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-01-18 18:09:52,970 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:52,991 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:53,007 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:53,020 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:53,032 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:53,065 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-01-18 18:09:53,066 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 4 variables, input treesize:72, output treesize:71 [2019-01-18 18:09:53,118 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:53,118 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 66 [2019-01-18 18:09:53,119 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:09:53,146 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-01-18 18:09:53,147 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:76, output treesize:50 [2019-01-18 18:09:53,208 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:53,215 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:53,216 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:53,217 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:53,217 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:53,218 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:53,219 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:53,220 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 88 [2019-01-18 18:09:53,220 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:09:53,254 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 18:09:53,254 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:62, output treesize:40 [2019-01-18 18:09:53,277 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:53,278 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:53,278 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:53,279 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:53,280 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:53,281 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:53,282 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:53,283 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:53,284 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:53,284 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 18:09:53,286 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:53,286 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 97 [2019-01-18 18:09:53,287 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:09:53,319 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-18 18:09:53,319 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:50, output treesize:34 [2019-01-18 18:09:53,338 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:09:53,338 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 18:09:53,374 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:09:53,392 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 18:09:53,392 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2019-01-18 18:09:53,392 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 18:09:53,392 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-01-18 18:09:53,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-01-18 18:09:53,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2019-01-18 18:09:53,393 INFO L87 Difference]: Start difference. First operand 122 states and 724 transitions. Second operand 10 states. [2019-01-18 18:09:53,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:09:53,922 INFO L93 Difference]: Finished difference Result 165 states and 829 transitions. [2019-01-18 18:09:53,922 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-01-18 18:09:53,922 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2019-01-18 18:09:53,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:09:53,925 INFO L225 Difference]: With dead ends: 165 [2019-01-18 18:09:53,925 INFO L226 Difference]: Without dead ends: 163 [2019-01-18 18:09:53,925 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=99, Invalid=173, Unknown=0, NotChecked=0, Total=272 [2019-01-18 18:09:53,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2019-01-18 18:09:53,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 125. [2019-01-18 18:09:53,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2019-01-18 18:09:53,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 745 transitions. [2019-01-18 18:09:53,943 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 745 transitions. Word has length 5 [2019-01-18 18:09:53,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:09:53,943 INFO L480 AbstractCegarLoop]: Abstraction has 125 states and 745 transitions. [2019-01-18 18:09:53,944 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-01-18 18:09:53,944 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 745 transitions. [2019-01-18 18:09:53,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-18 18:09:53,944 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:09:53,945 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-01-18 18:09:53,945 INFO L423 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:09:53,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:09:53,945 INFO L82 PathProgramCache]: Analyzing trace with hash 28829936, now seen corresponding path program 1 times [2019-01-18 18:09:53,945 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:09:53,946 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:09:53,946 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:09:53,946 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:09:53,946 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:09:53,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:09:53,988 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-01-18 18:09:53,989 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:09:53,989 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 18:09:53,989 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-01-18 18:09:53,989 INFO L207 CegarAbsIntRunner]: [0], [6], [22], [28], [29] [2019-01-18 18:09:53,990 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-18 18:09:53,990 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 18:09:54,205 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 18:09:54,206 INFO L272 AbstractInterpreter]: Visited 5 different actions 8 times. Merged at 1 different actions 1 times. Never widened. Found 4 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-18 18:09:54,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:09:54,206 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 18:09:54,206 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:09:54,206 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 18:09:54,214 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:09:54,214 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 18:09:54,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:09:54,219 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 18:09:54,245 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 21 treesize of output 24 [2019-01-18 18:09:54,247 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 24 treesize of output 30 [2019-01-18 18:09:54,254 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:54,256 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:54,256 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 26 treesize of output 40 [2019-01-18 18:09:54,259 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:54,261 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:54,263 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:54,263 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 28 treesize of output 54 [2019-01-18 18:09:54,273 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:54,276 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:54,278 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:54,280 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:54,280 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 30 treesize of output 72 [2019-01-18 18:09:54,294 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 71 [2019-01-18 18:09:54,294 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-18 18:09:54,338 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:54,378 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:54,405 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:54,426 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:54,442 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:54,479 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:54,480 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 48 treesize of output 54 [2019-01-18 18:09:54,521 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:54,523 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:54,523 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 41 treesize of output 53 [2019-01-18 18:09:54,575 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:54,578 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:54,580 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:54,580 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:54,581 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 32 treesize of output 61 [2019-01-18 18:09:54,637 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:54,639 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:54,640 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:54,641 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:54,642 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:54,643 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:54,644 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 41 [2019-01-18 18:09:54,645 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-01-18 18:09:54,663 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:54,678 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:54,696 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:54,730 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 18:09:54,731 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 5 variables, input treesize:72, output treesize:71 [2019-01-18 18:09:55,185 WARN L181 SmtUtils]: Spent 449.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 40 [2019-01-18 18:09:55,190 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:55,191 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 72 [2019-01-18 18:09:55,191 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:09:55,221 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 18:09:55,221 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:76, output treesize:50 [2019-01-18 18:09:55,241 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:55,242 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:55,243 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:55,244 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:55,245 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:55,246 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:55,247 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 18:09:55,248 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 80 [2019-01-18 18:09:55,249 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:09:55,296 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-18 18:09:55,296 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:60, output treesize:42 [2019-01-18 18:09:55,312 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:09:55,312 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 18:09:55,331 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:09:55,350 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 18:09:55,350 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 3, 3] total 8 [2019-01-18 18:09:55,350 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 18:09:55,351 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-01-18 18:09:55,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-01-18 18:09:55,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2019-01-18 18:09:55,351 INFO L87 Difference]: Start difference. First operand 125 states and 745 transitions. Second operand 7 states. [2019-01-18 18:09:55,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:09:55,631 INFO L93 Difference]: Finished difference Result 158 states and 796 transitions. [2019-01-18 18:09:55,631 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-18 18:09:55,631 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 5 [2019-01-18 18:09:55,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:09:55,634 INFO L225 Difference]: With dead ends: 158 [2019-01-18 18:09:55,634 INFO L226 Difference]: Without dead ends: 156 [2019-01-18 18:09:55,634 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2019-01-18 18:09:55,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2019-01-18 18:09:55,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 128. [2019-01-18 18:09:55,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2019-01-18 18:09:55,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 760 transitions. [2019-01-18 18:09:55,662 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 760 transitions. Word has length 5 [2019-01-18 18:09:55,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:09:55,662 INFO L480 AbstractCegarLoop]: Abstraction has 128 states and 760 transitions. [2019-01-18 18:09:55,662 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-01-18 18:09:55,662 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 760 transitions. [2019-01-18 18:09:55,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-18 18:09:55,663 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:09:55,663 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-01-18 18:09:55,663 INFO L423 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:09:55,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:09:55,664 INFO L82 PathProgramCache]: Analyzing trace with hash 28831546, now seen corresponding path program 2 times [2019-01-18 18:09:55,664 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:09:55,664 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:09:55,665 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:09:55,665 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:09:55,665 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:09:55,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:09:55,782 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:09:55,782 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:09:55,782 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 18:09:55,783 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-18 18:09:55,783 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-18 18:09:55,783 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:09:55,783 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 18:09:55,793 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-01-18 18:09:55,793 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-01-18 18:09:55,799 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-01-18 18:09:55,799 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-18 18:09:55,801 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 18:09:55,826 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:55,827 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 68 treesize of output 71 [2019-01-18 18:09:55,867 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:55,868 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:55,869 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 58 treesize of output 67 [2019-01-18 18:09:55,908 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:55,909 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:55,909 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:55,910 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:55,911 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 46 treesize of output 72 [2019-01-18 18:09:55,961 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:55,963 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:55,964 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:55,965 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:55,966 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:55,967 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:55,968 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 37 treesize of output 80 [2019-01-18 18:09:56,031 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:56,032 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:56,033 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:56,035 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:56,036 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:56,037 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:56,038 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:56,039 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:56,040 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 31 treesize of output 61 [2019-01-18 18:09:56,041 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2019-01-18 18:09:56,065 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:56,090 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:56,116 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:56,142 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:56,178 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-01-18 18:09:56,181 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2019-01-18 18:09:56,184 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2019-01-18 18:09:56,187 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 14 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2019-01-18 18:09:56,191 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 15 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2019-01-18 18:09:56,195 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 91 [2019-01-18 18:09:56,195 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2019-01-18 18:09:56,232 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:56,251 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:56,267 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:56,279 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:56,291 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:56,337 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 18:09:56,338 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 5 variables, input treesize:92, output treesize:91 [2019-01-18 18:09:56,366 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:56,367 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 41 treesize of output 97 [2019-01-18 18:09:56,367 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:09:56,411 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 18:09:56,411 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:101, output treesize:71 [2019-01-18 18:09:56,434 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:56,435 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:56,436 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:56,437 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:56,439 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:56,440 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:56,441 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:56,442 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:56,443 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 41 treesize of output 111 [2019-01-18 18:09:56,444 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:09:56,492 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-18 18:09:56,492 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:81, output treesize:55 [2019-01-18 18:09:56,518 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:56,519 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:56,520 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:56,520 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:56,521 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:56,522 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:56,523 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:56,524 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:56,525 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:56,526 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:56,527 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:56,528 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:56,529 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:56,530 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 18:09:56,531 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 43 treesize of output 118 [2019-01-18 18:09:56,531 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:09:56,580 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. [2019-01-18 18:09:56,581 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:67, output treesize:47 [2019-01-18 18:09:56,601 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:09:56,601 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 18:09:56,621 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:09:56,640 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 18:09:56,640 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2019-01-18 18:09:56,640 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 18:09:56,641 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-01-18 18:09:56,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-01-18 18:09:56,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2019-01-18 18:09:56,641 INFO L87 Difference]: Start difference. First operand 128 states and 760 transitions. Second operand 10 states. [2019-01-18 18:09:57,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:09:57,337 INFO L93 Difference]: Finished difference Result 241 states and 1191 transitions. [2019-01-18 18:09:57,337 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-01-18 18:09:57,337 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2019-01-18 18:09:57,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:09:57,340 INFO L225 Difference]: With dead ends: 241 [2019-01-18 18:09:57,340 INFO L226 Difference]: Without dead ends: 235 [2019-01-18 18:09:57,341 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2019-01-18 18:09:57,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2019-01-18 18:09:57,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 164. [2019-01-18 18:09:57,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2019-01-18 18:09:57,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 1007 transitions. [2019-01-18 18:09:57,378 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 1007 transitions. Word has length 5 [2019-01-18 18:09:57,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:09:57,379 INFO L480 AbstractCegarLoop]: Abstraction has 164 states and 1007 transitions. [2019-01-18 18:09:57,379 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-01-18 18:09:57,379 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 1007 transitions. [2019-01-18 18:09:57,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-18 18:09:57,380 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:09:57,380 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-01-18 18:09:57,380 INFO L423 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:09:57,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:09:57,380 INFO L82 PathProgramCache]: Analyzing trace with hash 28831858, now seen corresponding path program 1 times [2019-01-18 18:09:57,380 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:09:57,381 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:09:57,381 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-18 18:09:57,381 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:09:57,381 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:09:57,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:09:57,772 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-01-18 18:09:57,772 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:09:57,773 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 18:09:57,773 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-01-18 18:09:57,773 INFO L207 CegarAbsIntRunner]: [0], [6], [24], [28], [29] [2019-01-18 18:09:57,774 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-18 18:09:57,774 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 18:09:58,023 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 18:09:58,023 INFO L272 AbstractInterpreter]: Visited 5 different actions 8 times. Merged at 1 different actions 1 times. Never widened. Found 4 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-18 18:09:58,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:09:58,023 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 18:09:58,023 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:09:58,023 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 18:09:58,032 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:09:58,032 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 18:09:58,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:09:58,052 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 18:09:58,097 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-01-18 18:09:58,102 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 24 treesize of output 30 [2019-01-18 18:09:58,105 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:58,107 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:58,107 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 26 treesize of output 40 [2019-01-18 18:09:58,114 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:58,115 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:58,116 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:58,116 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 28 treesize of output 54 [2019-01-18 18:09:58,120 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:58,122 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:58,123 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:58,124 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:58,125 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 30 treesize of output 72 [2019-01-18 18:09:58,132 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 71 [2019-01-18 18:09:58,133 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-18 18:09:58,169 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:58,190 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:58,227 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:58,241 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:58,254 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:58,287 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:58,288 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 48 treesize of output 54 [2019-01-18 18:09:58,321 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:58,322 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:58,323 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 41 treesize of output 53 [2019-01-18 18:09:58,359 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:58,361 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:58,362 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:58,363 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:58,364 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 32 treesize of output 61 [2019-01-18 18:09:58,406 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:58,407 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:58,408 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:58,410 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:58,411 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:58,412 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:58,412 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 41 [2019-01-18 18:09:58,413 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-01-18 18:09:58,458 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:58,474 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:58,491 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:58,527 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 18:09:58,528 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 5 variables, input treesize:72, output treesize:71 [2019-01-18 18:09:58,765 WARN L181 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2019-01-18 18:09:58,841 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:58,864 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 81 [2019-01-18 18:09:58,865 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-01-18 18:09:58,972 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 7 dim-0 vars, and 2 xjuncts. [2019-01-18 18:09:58,973 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:81, output treesize:106 [2019-01-18 18:09:59,183 WARN L181 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2019-01-18 18:09:59,188 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:59,188 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:59,189 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:59,190 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:59,190 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:59,191 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 18:09:59,191 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 72 [2019-01-18 18:09:59,192 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:09:59,281 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:59,290 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:59,294 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:59,299 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:59,303 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:59,309 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:59,312 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:59,314 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:59,356 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 14 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 8 case distinctions, treesize of input 65 treesize of output 107 [2019-01-18 18:09:59,360 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 16 xjuncts. [2019-01-18 18:09:59,770 INFO L267 ElimStorePlain]: Start of recursive call 1: 9 dim-0 vars, 2 dim-1 vars, End of recursive call: 25 dim-0 vars, and 6 xjuncts. [2019-01-18 18:09:59,770 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 11 variables, input treesize:126, output treesize:280 [2019-01-18 18:10:00,003 WARN L181 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 90 [2019-01-18 18:10:00,008 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:10:00,008 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 18:10:00,092 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:10:00,111 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 18:10:00,111 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-18 18:10:00,111 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 18:10:00,112 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-18 18:10:00,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-18 18:10:00,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2019-01-18 18:10:00,112 INFO L87 Difference]: Start difference. First operand 164 states and 1007 transitions. Second operand 8 states. [2019-01-18 18:10:00,605 WARN L181 SmtUtils]: Spent 480.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 46 [2019-01-18 18:10:01,094 WARN L181 SmtUtils]: Spent 446.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 70 [2019-01-18 18:10:01,630 WARN L181 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 72 [2019-01-18 18:10:01,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:10:01,982 INFO L93 Difference]: Finished difference Result 208 states and 1150 transitions. [2019-01-18 18:10:01,982 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-01-18 18:10:01,982 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 5 [2019-01-18 18:10:01,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:10:01,985 INFO L225 Difference]: With dead ends: 208 [2019-01-18 18:10:01,985 INFO L226 Difference]: Without dead ends: 207 [2019-01-18 18:10:01,985 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=72, Invalid=110, Unknown=0, NotChecked=0, Total=182 [2019-01-18 18:10:01,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2019-01-18 18:10:02,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 181. [2019-01-18 18:10:02,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2019-01-18 18:10:02,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 1128 transitions. [2019-01-18 18:10:02,027 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 1128 transitions. Word has length 5 [2019-01-18 18:10:02,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:10:02,027 INFO L480 AbstractCegarLoop]: Abstraction has 181 states and 1128 transitions. [2019-01-18 18:10:02,027 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-18 18:10:02,027 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 1128 transitions. [2019-01-18 18:10:02,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-18 18:10:02,028 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:10:02,028 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-01-18 18:10:02,028 INFO L423 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:10:02,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:10:02,029 INFO L82 PathProgramCache]: Analyzing trace with hash 28818278, now seen corresponding path program 1 times [2019-01-18 18:10:02,029 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:10:02,029 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:10:02,030 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:10:02,030 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:10:02,030 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:10:02,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:10:02,420 WARN L181 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 13 [2019-01-18 18:10:02,508 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:10:02,508 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:10:02,509 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 18:10:02,509 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-01-18 18:10:02,509 INFO L207 CegarAbsIntRunner]: [0], [6], [10], [24], [27] [2019-01-18 18:10:02,511 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-18 18:10:02,511 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 18:10:02,874 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 18:10:02,874 INFO L272 AbstractInterpreter]: Visited 5 different actions 9 times. Merged at 1 different actions 1 times. Never widened. Found 6 fixpoints after 4 different actions. Largest state had 0 variables. [2019-01-18 18:10:02,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:10:02,874 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 18:10:02,874 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:10:02,874 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 18:10:02,883 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:10:02,883 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 18:10:02,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:10:02,888 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 18:10:02,915 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:02,916 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 48 treesize of output 54 [2019-01-18 18:10:02,952 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:02,954 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:02,954 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 41 treesize of output 53 [2019-01-18 18:10:02,995 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:02,995 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:02,996 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:02,997 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:02,997 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 32 treesize of output 61 [2019-01-18 18:10:03,039 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:03,040 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:03,041 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:03,043 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:03,047 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:03,048 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:03,049 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 41 [2019-01-18 18:10:03,049 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2019-01-18 18:10:03,064 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:03,079 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:03,096 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:03,120 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-01-18 18:10:03,122 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2019-01-18 18:10:03,126 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2019-01-18 18:10:03,129 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2019-01-18 18:10:03,132 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 30 treesize of output 72 [2019-01-18 18:10:03,141 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 71 [2019-01-18 18:10:03,142 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-01-18 18:10:03,167 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:03,187 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:03,203 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:03,216 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:03,227 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:03,259 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 18:10:03,260 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 5 variables, input treesize:72, output treesize:71 [2019-01-18 18:10:03,513 WARN L181 SmtUtils]: Spent 247.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2019-01-18 18:10:03,522 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:03,531 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 81 [2019-01-18 18:10:03,532 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-01-18 18:10:03,638 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 2 xjuncts. [2019-01-18 18:10:03,638 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:81, output treesize:109 [2019-01-18 18:10:03,863 WARN L181 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2019-01-18 18:10:03,870 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:03,871 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:03,874 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:03,876 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:03,877 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:03,878 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:03,879 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:03,880 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:03,889 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 14 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 65 treesize of output 103 [2019-01-18 18:10:03,891 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-01-18 18:10:04,052 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:04,054 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:04,055 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:04,056 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:04,057 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:04,058 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:04,059 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:04,060 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 89 [2019-01-18 18:10:04,061 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-01-18 18:10:04,145 INFO L267 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 2 dim-1 vars, End of recursive call: 11 dim-0 vars, and 3 xjuncts. [2019-01-18 18:10:04,146 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 10 variables, input treesize:129, output treesize:125 [2019-01-18 18:10:04,380 WARN L181 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2019-01-18 18:10:04,426 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:04,428 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:04,429 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:04,430 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:04,432 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:04,433 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:04,434 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:04,436 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:04,438 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:04,440 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:04,441 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:04,442 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:04,443 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:04,443 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 18:10:04,466 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 6 case distinctions, treesize of input 55 treesize of output 118 [2019-01-18 18:10:04,469 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 8 xjuncts. [2019-01-18 18:10:04,841 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:04,842 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:04,843 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:04,844 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:04,845 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:04,846 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:04,847 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:04,848 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:04,849 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:04,850 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 18:10:04,851 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:04,851 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 88 [2019-01-18 18:10:04,852 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-01-18 18:10:05,007 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:05,008 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:05,009 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:05,011 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:05,012 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:05,013 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:05,014 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:05,015 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:05,016 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:05,017 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:05,018 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:05,019 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:05,020 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:05,021 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 16 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 110 [2019-01-18 18:10:05,021 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-01-18 18:10:05,180 INFO L267 ElimStorePlain]: Start of recursive call 1: 13 dim-0 vars, 3 dim-1 vars, End of recursive call: 25 dim-0 vars, and 6 xjuncts. [2019-01-18 18:10:05,180 INFO L202 ElimStorePlain]: Needed 4 recursive calls to eliminate 16 variables, input treesize:156, output treesize:242 [2019-01-18 18:10:05,299 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:10:05,299 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 18:10:05,332 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:10:05,351 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 18:10:05,351 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2019-01-18 18:10:05,351 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 18:10:05,351 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-01-18 18:10:05,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-01-18 18:10:05,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2019-01-18 18:10:05,352 INFO L87 Difference]: Start difference. First operand 181 states and 1128 transitions. Second operand 10 states. [2019-01-18 18:10:06,023 WARN L181 SmtUtils]: Spent 474.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 84 [2019-01-18 18:10:06,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:10:06,588 INFO L93 Difference]: Finished difference Result 280 states and 1534 transitions. [2019-01-18 18:10:06,588 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-01-18 18:10:06,588 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2019-01-18 18:10:06,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:10:06,593 INFO L225 Difference]: With dead ends: 280 [2019-01-18 18:10:06,593 INFO L226 Difference]: Without dead ends: 279 [2019-01-18 18:10:06,593 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2019-01-18 18:10:06,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2019-01-18 18:10:06,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 185. [2019-01-18 18:10:06,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2019-01-18 18:10:06,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 1156 transitions. [2019-01-18 18:10:06,627 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 1156 transitions. Word has length 5 [2019-01-18 18:10:06,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:10:06,628 INFO L480 AbstractCegarLoop]: Abstraction has 185 states and 1156 transitions. [2019-01-18 18:10:06,628 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-01-18 18:10:06,628 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 1156 transitions. [2019-01-18 18:10:06,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-18 18:10:06,629 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:10:06,629 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-01-18 18:10:06,629 INFO L423 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:10:06,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:10:06,630 INFO L82 PathProgramCache]: Analyzing trace with hash 28835766, now seen corresponding path program 1 times [2019-01-18 18:10:06,630 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:10:06,630 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:10:06,631 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:10:06,631 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:10:06,631 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:10:06,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:10:06,811 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-01-18 18:10:06,811 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-01-18 18:10:06,811 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-01-18 18:10:06,811 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-01-18 18:10:06,812 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-01-18 18:10:06,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-01-18 18:10:06,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-01-18 18:10:06,812 INFO L87 Difference]: Start difference. First operand 185 states and 1156 transitions. Second operand 4 states. [2019-01-18 18:10:06,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:10:06,903 INFO L93 Difference]: Finished difference Result 201 states and 1179 transitions. [2019-01-18 18:10:06,903 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-01-18 18:10:06,903 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 5 [2019-01-18 18:10:06,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:10:06,906 INFO L225 Difference]: With dead ends: 201 [2019-01-18 18:10:06,906 INFO L226 Difference]: Without dead ends: 198 [2019-01-18 18:10:06,907 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-01-18 18:10:06,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2019-01-18 18:10:06,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 187. [2019-01-18 18:10:06,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2019-01-18 18:10:06,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 1164 transitions. [2019-01-18 18:10:06,952 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 1164 transitions. Word has length 5 [2019-01-18 18:10:06,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:10:06,952 INFO L480 AbstractCegarLoop]: Abstraction has 187 states and 1164 transitions. [2019-01-18 18:10:06,953 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-01-18 18:10:06,953 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 1164 transitions. [2019-01-18 18:10:06,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-18 18:10:06,954 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:10:06,954 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-01-18 18:10:06,954 INFO L423 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:10:06,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:10:06,954 INFO L82 PathProgramCache]: Analyzing trace with hash 28822248, now seen corresponding path program 1 times [2019-01-18 18:10:06,954 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:10:06,955 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:10:06,955 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:10:06,955 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:10:06,955 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:10:06,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:10:07,075 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-01-18 18:10:07,075 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:10:07,076 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 18:10:07,076 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-01-18 18:10:07,076 INFO L207 CegarAbsIntRunner]: [0], [6], [14], [28], [29] [2019-01-18 18:10:07,078 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-18 18:10:07,078 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 18:10:07,297 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 18:10:07,297 INFO L272 AbstractInterpreter]: Visited 5 different actions 8 times. Merged at 1 different actions 1 times. Never widened. Found 4 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-18 18:10:07,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:10:07,298 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 18:10:07,298 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:10:07,298 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 18:10:07,308 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:10:07,308 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 18:10:07,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:10:07,316 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 18:10:07,347 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:07,347 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 48 treesize of output 54 [2019-01-18 18:10:07,387 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:07,389 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:07,389 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 41 treesize of output 53 [2019-01-18 18:10:07,428 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:07,429 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:07,431 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:07,433 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:07,434 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 32 treesize of output 61 [2019-01-18 18:10:07,478 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:07,480 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:07,481 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:07,483 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:07,485 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:07,487 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:07,488 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 41 [2019-01-18 18:10:07,488 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2019-01-18 18:10:07,510 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:07,531 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:07,554 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:07,583 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-01-18 18:10:07,587 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2019-01-18 18:10:07,589 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2019-01-18 18:10:07,591 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2019-01-18 18:10:07,594 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 30 treesize of output 72 [2019-01-18 18:10:07,601 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 71 [2019-01-18 18:10:07,602 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-01-18 18:10:07,627 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:07,648 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:07,664 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:07,678 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:07,690 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:07,723 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 18:10:07,724 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 5 variables, input treesize:72, output treesize:71 [2019-01-18 18:10:07,762 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:07,762 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 72 [2019-01-18 18:10:07,763 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:10:07,792 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 18:10:07,793 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:76, output treesize:50 [2019-01-18 18:10:07,813 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:07,814 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:07,815 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:07,815 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:07,816 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:07,817 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:07,817 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 18:10:07,818 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 80 [2019-01-18 18:10:07,819 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:10:07,848 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-18 18:10:07,849 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:60, output treesize:42 [2019-01-18 18:10:07,868 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:10:07,869 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 18:10:07,888 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:10:07,908 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 18:10:07,909 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-18 18:10:07,909 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 18:10:07,909 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-18 18:10:07,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-18 18:10:07,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2019-01-18 18:10:07,910 INFO L87 Difference]: Start difference. First operand 187 states and 1164 transitions. Second operand 8 states. [2019-01-18 18:10:08,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:10:08,236 INFO L93 Difference]: Finished difference Result 208 states and 1202 transitions. [2019-01-18 18:10:08,237 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-18 18:10:08,237 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 5 [2019-01-18 18:10:08,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:10:08,240 INFO L225 Difference]: With dead ends: 208 [2019-01-18 18:10:08,240 INFO L226 Difference]: Without dead ends: 207 [2019-01-18 18:10:08,241 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2019-01-18 18:10:08,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2019-01-18 18:10:08,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 189. [2019-01-18 18:10:08,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2019-01-18 18:10:08,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 1178 transitions. [2019-01-18 18:10:08,283 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 1178 transitions. Word has length 5 [2019-01-18 18:10:08,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:10:08,283 INFO L480 AbstractCegarLoop]: Abstraction has 189 states and 1178 transitions. [2019-01-18 18:10:08,283 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-18 18:10:08,284 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 1178 transitions. [2019-01-18 18:10:08,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-18 18:10:08,284 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:10:08,285 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-01-18 18:10:08,285 INFO L423 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:10:08,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:10:08,285 INFO L82 PathProgramCache]: Analyzing trace with hash 29302748, now seen corresponding path program 1 times [2019-01-18 18:10:08,285 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:10:08,286 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:10:08,286 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:10:08,286 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:10:08,286 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:10:08,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:10:08,419 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:10:08,419 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:10:08,419 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 18:10:08,419 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-01-18 18:10:08,419 INFO L207 CegarAbsIntRunner]: [0], [18], [22], [28], [29] [2019-01-18 18:10:08,420 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-18 18:10:08,420 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 18:10:08,713 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 18:10:08,713 INFO L272 AbstractInterpreter]: Visited 5 different actions 8 times. Merged at 1 different actions 1 times. Never widened. Found 4 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-18 18:10:08,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:10:08,713 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 18:10:08,713 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:10:08,713 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 18:10:08,722 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:10:08,722 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 18:10:08,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:10:08,727 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 18:10:08,732 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 43 treesize of output 39 [2019-01-18 18:10:08,755 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:08,759 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:08,760 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 36 treesize of output 49 [2019-01-18 18:10:08,802 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:08,804 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:08,807 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:08,809 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:08,809 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 57 [2019-01-18 18:10:08,845 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:08,846 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:08,848 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:08,850 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:08,852 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:08,855 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:08,856 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 37 [2019-01-18 18:10:08,856 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2019-01-18 18:10:08,874 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:08,893 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:08,916 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:08,942 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-01-18 18:10:08,945 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2019-01-18 18:10:08,949 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 36 [2019-01-18 18:10:08,955 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 9 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 50 [2019-01-18 18:10:08,958 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 68 [2019-01-18 18:10:08,968 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 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 32 treesize of output 67 [2019-01-18 18:10:08,968 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-01-18 18:10:08,993 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:09,011 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:09,025 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:09,036 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:09,047 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:09,076 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 18:10:09,077 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 5 variables, input treesize:64, output treesize:67 [2019-01-18 18:10:09,117 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:09,118 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 68 [2019-01-18 18:10:09,118 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:10:09,146 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 18:10:09,146 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:72, output treesize:46 [2019-01-18 18:10:09,167 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:09,168 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:09,169 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:09,170 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:09,172 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:09,173 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:09,174 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:09,175 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 74 [2019-01-18 18:10:09,176 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:10:09,201 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-18 18:10:09,202 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:56, output treesize:34 [2019-01-18 18:10:09,220 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:10:09,220 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 18:10:09,240 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:10:09,259 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 18:10:09,259 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-18 18:10:09,259 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 18:10:09,259 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-18 18:10:09,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-18 18:10:09,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2019-01-18 18:10:09,260 INFO L87 Difference]: Start difference. First operand 189 states and 1178 transitions. Second operand 8 states. [2019-01-18 18:10:09,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:10:09,588 INFO L93 Difference]: Finished difference Result 210 states and 1196 transitions. [2019-01-18 18:10:09,588 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-18 18:10:09,589 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 5 [2019-01-18 18:10:09,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:10:09,591 INFO L225 Difference]: With dead ends: 210 [2019-01-18 18:10:09,591 INFO L226 Difference]: Without dead ends: 208 [2019-01-18 18:10:09,592 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2019-01-18 18:10:09,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2019-01-18 18:10:09,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 191. [2019-01-18 18:10:09,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2019-01-18 18:10:09,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 1179 transitions. [2019-01-18 18:10:09,624 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 1179 transitions. Word has length 5 [2019-01-18 18:10:09,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:10:09,624 INFO L480 AbstractCegarLoop]: Abstraction has 191 states and 1179 transitions. [2019-01-18 18:10:09,625 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-18 18:10:09,625 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 1179 transitions. [2019-01-18 18:10:09,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-18 18:10:09,626 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:10:09,626 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-01-18 18:10:09,626 INFO L423 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:10:09,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:10:09,626 INFO L82 PathProgramCache]: Analyzing trace with hash 29308202, now seen corresponding path program 2 times [2019-01-18 18:10:09,626 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:10:09,627 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:10:09,627 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:10:09,627 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:10:09,627 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:10:09,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:10:09,781 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:10:09,781 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:10:09,781 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 18:10:09,781 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-18 18:10:09,781 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-18 18:10:09,782 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:10:09,782 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 18:10:09,790 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-01-18 18:10:09,790 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-01-18 18:10:09,796 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-01-18 18:10:09,796 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-18 18:10:09,797 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 18:10:09,820 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:09,821 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 68 treesize of output 71 [2019-01-18 18:10:09,857 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:09,859 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:09,859 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 58 treesize of output 67 [2019-01-18 18:10:09,904 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:09,906 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:09,908 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:09,910 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:09,911 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 46 treesize of output 72 [2019-01-18 18:10:09,960 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:09,962 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:09,963 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:09,964 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:09,966 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:09,968 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:09,969 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 37 treesize of output 80 [2019-01-18 18:10:10,034 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:10,036 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:10,037 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:10,039 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:10,040 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:10,042 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:10,044 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:10,045 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:10,046 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 31 treesize of output 61 [2019-01-18 18:10:10,046 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2019-01-18 18:10:10,078 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:10,108 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:10,140 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:10,172 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:10,214 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-01-18 18:10:10,217 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2019-01-18 18:10:10,220 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2019-01-18 18:10:10,223 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 14 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2019-01-18 18:10:10,226 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 15 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2019-01-18 18:10:10,230 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 91 [2019-01-18 18:10:10,231 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2019-01-18 18:10:10,350 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:10,370 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:10,386 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:10,400 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:10,412 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:10,457 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-01-18 18:10:10,457 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 4 variables, input treesize:92, output treesize:91 [2019-01-18 18:10:10,491 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:10,492 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 41 treesize of output 97 [2019-01-18 18:10:10,492 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:10:10,537 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 18:10:10,538 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:101, output treesize:71 [2019-01-18 18:10:10,565 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:10,566 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:10,567 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:10,568 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:10,569 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:10,570 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:10,571 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:10,572 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:10,573 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 41 treesize of output 111 [2019-01-18 18:10:10,574 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:10:10,621 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-18 18:10:10,622 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:81, output treesize:55 [2019-01-18 18:10:10,648 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:10,648 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:10,649 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:10,650 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:10,651 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:10,652 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:10,653 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:10,654 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:10,655 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:10,657 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:10,658 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:10,659 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:10,659 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:10,660 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:10,661 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 18:10:10,662 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 43 treesize of output 124 [2019-01-18 18:10:10,663 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:10:10,714 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. [2019-01-18 18:10:10,714 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:67, output treesize:47 [2019-01-18 18:10:10,734 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:10:10,734 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 18:10:10,774 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:10:10,793 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 18:10:10,794 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2019-01-18 18:10:10,794 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 18:10:10,794 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-01-18 18:10:10,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-01-18 18:10:10,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2019-01-18 18:10:10,794 INFO L87 Difference]: Start difference. First operand 191 states and 1179 transitions. Second operand 10 states. [2019-01-18 18:10:12,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:10:12,340 INFO L93 Difference]: Finished difference Result 242 states and 1308 transitions. [2019-01-18 18:10:12,340 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-01-18 18:10:12,340 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2019-01-18 18:10:12,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:10:12,343 INFO L225 Difference]: With dead ends: 242 [2019-01-18 18:10:12,343 INFO L226 Difference]: Without dead ends: 240 [2019-01-18 18:10:12,344 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=100, Invalid=172, Unknown=0, NotChecked=0, Total=272 [2019-01-18 18:10:12,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2019-01-18 18:10:12,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 202. [2019-01-18 18:10:12,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2019-01-18 18:10:12,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 1251 transitions. [2019-01-18 18:10:12,376 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 1251 transitions. Word has length 5 [2019-01-18 18:10:12,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:10:12,376 INFO L480 AbstractCegarLoop]: Abstraction has 202 states and 1251 transitions. [2019-01-18 18:10:12,376 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-01-18 18:10:12,376 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 1251 transitions. [2019-01-18 18:10:12,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-18 18:10:12,377 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:10:12,377 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-01-18 18:10:12,377 INFO L423 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:10:12,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:10:12,377 INFO L82 PathProgramCache]: Analyzing trace with hash 29307954, now seen corresponding path program 1 times [2019-01-18 18:10:12,377 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:10:12,378 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:10:12,378 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-18 18:10:12,378 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:10:12,378 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:10:12,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:10:12,526 WARN L181 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2019-01-18 18:10:12,874 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:10:12,874 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:10:12,874 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 18:10:12,874 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-01-18 18:10:12,875 INFO L207 CegarAbsIntRunner]: [0], [10], [22], [24], [27] [2019-01-18 18:10:12,875 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-18 18:10:12,876 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 18:10:13,181 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 18:10:13,182 INFO L272 AbstractInterpreter]: Visited 5 different actions 9 times. Merged at 1 different actions 1 times. Never widened. Found 6 fixpoints after 4 different actions. Largest state had 0 variables. [2019-01-18 18:10:13,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:10:13,182 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 18:10:13,182 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:10:13,182 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 18:10:13,191 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:10:13,191 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 18:10:13,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:10:13,197 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 18:10:13,226 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 21 treesize of output 24 [2019-01-18 18:10:13,228 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 24 treesize of output 30 [2019-01-18 18:10:13,235 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:13,237 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:13,237 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 26 treesize of output 40 [2019-01-18 18:10:13,245 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:13,247 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:13,249 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:13,250 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 28 treesize of output 54 [2019-01-18 18:10:13,258 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:13,261 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:13,263 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:13,266 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:13,266 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 30 treesize of output 72 [2019-01-18 18:10:13,271 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:13,272 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:13,273 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:13,273 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:13,274 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:13,275 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 91 [2019-01-18 18:10:13,275 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-18 18:10:13,312 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:13,334 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:13,352 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:13,367 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:13,381 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:13,413 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:13,414 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 68 treesize of output 71 [2019-01-18 18:10:13,458 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:13,459 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:13,460 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 58 treesize of output 67 [2019-01-18 18:10:13,499 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:13,500 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:13,501 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:13,503 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:13,504 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 46 treesize of output 72 [2019-01-18 18:10:13,552 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:13,553 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:13,555 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:13,556 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:13,557 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:13,558 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:13,559 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 37 treesize of output 80 [2019-01-18 18:10:13,619 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:13,620 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:13,621 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:13,623 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:13,624 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:13,625 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:13,626 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:13,627 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:13,628 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 31 treesize of output 61 [2019-01-18 18:10:13,628 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2019-01-18 18:10:13,654 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:13,679 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:13,705 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:13,732 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:13,779 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-01-18 18:10:13,779 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 4 variables, input treesize:92, output treesize:91 [2019-01-18 18:10:13,814 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:13,814 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 41 treesize of output 97 [2019-01-18 18:10:13,815 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:10:13,861 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 18:10:13,861 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:101, output treesize:71 [2019-01-18 18:10:13,888 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:13,889 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:13,890 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:13,891 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:13,892 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:13,893 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:13,894 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:13,895 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:13,896 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 41 treesize of output 111 [2019-01-18 18:10:13,897 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:10:13,946 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-18 18:10:13,947 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:81, output treesize:55 [2019-01-18 18:10:14,003 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:14,004 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:14,005 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:14,005 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:14,006 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:14,007 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:14,008 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:14,009 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:14,010 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:14,011 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:14,012 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:14,013 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:14,014 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:14,015 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:14,015 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 18:10:14,016 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 43 treesize of output 134 [2019-01-18 18:10:14,017 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:10:14,072 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. [2019-01-18 18:10:14,072 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:67, output treesize:47 [2019-01-18 18:10:14,092 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:10:14,093 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 18:10:14,133 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:10:14,152 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 18:10:14,152 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2019-01-18 18:10:14,152 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 18:10:14,152 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-01-18 18:10:14,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-01-18 18:10:14,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2019-01-18 18:10:14,153 INFO L87 Difference]: Start difference. First operand 202 states and 1251 transitions. Second operand 10 states. [2019-01-18 18:10:14,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:10:14,792 INFO L93 Difference]: Finished difference Result 249 states and 1369 transitions. [2019-01-18 18:10:14,792 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-01-18 18:10:14,792 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2019-01-18 18:10:14,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:10:14,796 INFO L225 Difference]: With dead ends: 249 [2019-01-18 18:10:14,796 INFO L226 Difference]: Without dead ends: 247 [2019-01-18 18:10:14,797 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=100, Invalid=172, Unknown=0, NotChecked=0, Total=272 [2019-01-18 18:10:14,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2019-01-18 18:10:14,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 212. [2019-01-18 18:10:14,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2019-01-18 18:10:14,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 1326 transitions. [2019-01-18 18:10:14,829 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 1326 transitions. Word has length 5 [2019-01-18 18:10:14,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:10:14,829 INFO L480 AbstractCegarLoop]: Abstraction has 212 states and 1326 transitions. [2019-01-18 18:10:14,829 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-01-18 18:10:14,829 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 1326 transitions. [2019-01-18 18:10:14,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-18 18:10:14,830 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:10:14,831 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-01-18 18:10:14,831 INFO L423 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:10:14,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:10:14,831 INFO L82 PathProgramCache]: Analyzing trace with hash 29294624, now seen corresponding path program 1 times [2019-01-18 18:10:14,831 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:10:14,832 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:10:14,832 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:10:14,832 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:10:14,832 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:10:14,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:10:15,004 WARN L181 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 17 [2019-01-18 18:10:15,033 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:10:15,033 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:10:15,033 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 18:10:15,033 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-01-18 18:10:15,034 INFO L207 CegarAbsIntRunner]: [0], [10], [14], [22], [27] [2019-01-18 18:10:15,035 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-18 18:10:15,035 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 18:10:15,314 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 18:10:15,314 INFO L272 AbstractInterpreter]: Visited 5 different actions 9 times. Merged at 1 different actions 1 times. Never widened. Found 6 fixpoints after 4 different actions. Largest state had 0 variables. [2019-01-18 18:10:15,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:10:15,315 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 18:10:15,315 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:10:15,315 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 18:10:15,323 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:10:15,323 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 18:10:15,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:10:15,328 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 18:10:15,354 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 21 treesize of output 24 [2019-01-18 18:10:15,361 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 24 treesize of output 30 [2019-01-18 18:10:15,371 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:15,373 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:15,374 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 26 treesize of output 40 [2019-01-18 18:10:15,381 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:15,383 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:15,385 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:15,385 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 28 treesize of output 54 [2019-01-18 18:10:15,391 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:15,392 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:15,392 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:15,393 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:15,394 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 30 treesize of output 72 [2019-01-18 18:10:15,407 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 71 [2019-01-18 18:10:15,407 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-18 18:10:15,437 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:15,460 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:15,478 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:15,492 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:15,505 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:15,535 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:15,537 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 48 treesize of output 54 [2019-01-18 18:10:15,567 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:15,568 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:15,568 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 41 treesize of output 53 [2019-01-18 18:10:15,604 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:15,606 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:15,607 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:15,608 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:15,609 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 32 treesize of output 61 [2019-01-18 18:10:15,652 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:15,653 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:15,654 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:15,656 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:15,657 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:15,658 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:15,659 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 41 [2019-01-18 18:10:15,660 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-01-18 18:10:15,717 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:15,733 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:15,750 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:15,800 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-01-18 18:10:15,801 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 4 variables, input treesize:72, output treesize:71 [2019-01-18 18:10:15,856 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:15,857 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 72 [2019-01-18 18:10:15,857 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:10:15,887 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-01-18 18:10:15,887 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:76, output treesize:50 [2019-01-18 18:10:15,914 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:15,915 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:15,916 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:15,917 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:15,918 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:15,919 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:15,920 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:15,921 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 86 [2019-01-18 18:10:15,922 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:10:15,956 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 18:10:15,956 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:60, output treesize:38 [2019-01-18 18:10:15,980 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:15,981 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:15,983 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:15,984 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:15,985 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:15,986 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:15,987 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:15,988 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:15,989 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:15,990 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:15,992 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:15,992 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 18:10:15,993 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 98 [2019-01-18 18:10:15,994 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:10:16,071 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-18 18:10:16,072 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:50, output treesize:36 [2019-01-18 18:10:16,091 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:10:16,092 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 18:10:16,129 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:10:16,147 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 18:10:16,147 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2019-01-18 18:10:16,147 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 18:10:16,147 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-01-18 18:10:16,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-01-18 18:10:16,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2019-01-18 18:10:16,148 INFO L87 Difference]: Start difference. First operand 212 states and 1326 transitions. Second operand 10 states. [2019-01-18 18:10:16,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:10:16,757 INFO L93 Difference]: Finished difference Result 260 states and 1437 transitions. [2019-01-18 18:10:16,757 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-01-18 18:10:16,757 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2019-01-18 18:10:16,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:10:16,760 INFO L225 Difference]: With dead ends: 260 [2019-01-18 18:10:16,761 INFO L226 Difference]: Without dead ends: 258 [2019-01-18 18:10:16,761 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=109, Invalid=197, Unknown=0, NotChecked=0, Total=306 [2019-01-18 18:10:16,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2019-01-18 18:10:16,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 221. [2019-01-18 18:10:16,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2019-01-18 18:10:16,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 1389 transitions. [2019-01-18 18:10:16,797 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 1389 transitions. Word has length 5 [2019-01-18 18:10:16,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:10:16,797 INFO L480 AbstractCegarLoop]: Abstraction has 221 states and 1389 transitions. [2019-01-18 18:10:16,797 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-01-18 18:10:16,797 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 1389 transitions. [2019-01-18 18:10:16,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-18 18:10:16,798 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:10:16,798 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-01-18 18:10:16,798 INFO L423 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:10:16,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:10:16,799 INFO L82 PathProgramCache]: Analyzing trace with hash 29298904, now seen corresponding path program 1 times [2019-01-18 18:10:16,799 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:10:16,799 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:10:16,799 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:10:16,799 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:10:16,799 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:10:16,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:10:16,914 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:10:16,915 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:10:16,915 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 18:10:16,915 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-01-18 18:10:16,915 INFO L207 CegarAbsIntRunner]: [0], [14], [22], [28], [29] [2019-01-18 18:10:16,916 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-18 18:10:16,916 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 18:10:17,131 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 18:10:17,131 INFO L272 AbstractInterpreter]: Visited 5 different actions 8 times. Merged at 1 different actions 1 times. Never widened. Found 4 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-18 18:10:17,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:10:17,132 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 18:10:17,132 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:10:17,132 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 18:10:17,140 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:10:17,140 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 18:10:17,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:10:17,146 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 18:10:17,149 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 21 treesize of output 24 [2019-01-18 18:10:17,156 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 24 treesize of output 26 [2019-01-18 18:10:17,164 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:17,166 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:17,167 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 26 treesize of output 36 [2019-01-18 18:10:17,173 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:17,175 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:17,177 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:17,177 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 28 treesize of output 50 [2019-01-18 18:10:17,185 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:17,190 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:17,192 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:17,195 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:17,195 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 68 [2019-01-18 18:10:17,207 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:17,209 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:17,215 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:17,217 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:17,217 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:17,218 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 14 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 87 [2019-01-18 18:10:17,218 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-18 18:10:17,258 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:17,280 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:17,297 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:17,311 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:17,325 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:17,354 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 63 treesize of output 56 [2019-01-18 18:10:17,370 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:17,373 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:17,374 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 53 treesize of output 63 [2019-01-18 18:10:17,412 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:17,414 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:17,416 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:17,417 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:17,418 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 46 treesize of output 68 [2019-01-18 18:10:17,462 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:17,464 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:17,465 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:17,466 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:17,467 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:17,469 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:17,470 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 76 [2019-01-18 18:10:17,526 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:17,527 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:17,528 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:17,529 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:17,530 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:17,532 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:17,533 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:17,534 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:17,535 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2019-01-18 18:10:17,536 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2019-01-18 18:10:17,557 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:17,580 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:17,604 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:17,629 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:17,671 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 18:10:17,672 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 5 variables, input treesize:84, output treesize:87 [2019-01-18 18:10:17,699 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:17,700 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 93 [2019-01-18 18:10:17,700 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:10:17,741 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-18 18:10:17,742 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:97, output treesize:67 [2019-01-18 18:10:17,764 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:17,765 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:17,766 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:17,767 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:17,768 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:17,770 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:17,771 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:17,772 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 18:10:17,772 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 101 [2019-01-18 18:10:17,773 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:10:17,816 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. [2019-01-18 18:10:17,816 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:77, output treesize:55 [2019-01-18 18:10:17,835 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:10:17,836 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 18:10:17,855 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:10:17,874 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 18:10:17,874 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-18 18:10:17,874 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 18:10:17,874 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-18 18:10:17,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-18 18:10:17,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2019-01-18 18:10:17,874 INFO L87 Difference]: Start difference. First operand 221 states and 1389 transitions. Second operand 8 states. [2019-01-18 18:10:18,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:10:18,192 INFO L93 Difference]: Finished difference Result 244 states and 1417 transitions. [2019-01-18 18:10:18,192 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-18 18:10:18,193 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 5 [2019-01-18 18:10:18,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:10:18,196 INFO L225 Difference]: With dead ends: 244 [2019-01-18 18:10:18,196 INFO L226 Difference]: Without dead ends: 243 [2019-01-18 18:10:18,196 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2019-01-18 18:10:18,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2019-01-18 18:10:18,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 221. [2019-01-18 18:10:18,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2019-01-18 18:10:18,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 1389 transitions. [2019-01-18 18:10:18,242 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 1389 transitions. Word has length 5 [2019-01-18 18:10:18,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:10:18,243 INFO L480 AbstractCegarLoop]: Abstraction has 221 states and 1389 transitions. [2019-01-18 18:10:18,243 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-18 18:10:18,243 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 1389 transitions. [2019-01-18 18:10:18,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-18 18:10:18,244 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:10:18,244 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-01-18 18:10:18,244 INFO L423 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:10:18,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:10:18,244 INFO L82 PathProgramCache]: Analyzing trace with hash 29366174, now seen corresponding path program 1 times [2019-01-18 18:10:18,245 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:10:18,245 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:10:18,245 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:10:18,245 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:10:18,245 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:10:18,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:10:18,390 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:10:18,391 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:10:18,391 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 18:10:18,391 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-01-18 18:10:18,391 INFO L207 CegarAbsIntRunner]: [0], [22], [24], [28], [29] [2019-01-18 18:10:18,392 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-18 18:10:18,393 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 18:10:18,661 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 18:10:18,661 INFO L272 AbstractInterpreter]: Visited 5 different actions 8 times. Merged at 1 different actions 1 times. Never widened. Found 4 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-18 18:10:18,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:10:18,661 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 18:10:18,662 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:10:18,662 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 18:10:18,676 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:10:18,676 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 18:10:18,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:10:18,698 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 18:10:18,714 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 21 treesize of output 24 [2019-01-18 18:10:18,752 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 24 treesize of output 26 [2019-01-18 18:10:18,801 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:18,826 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:18,827 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 26 treesize of output 36 [2019-01-18 18:10:18,878 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:18,903 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:18,928 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:18,929 INFO L303 Elim1Store]: Index analysis took 101 ms [2019-01-18 18:10:18,930 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 28 treesize of output 50 [2019-01-18 18:10:18,968 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:19,017 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:19,042 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:19,060 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:19,060 INFO L303 Elim1Store]: Index analysis took 129 ms [2019-01-18 18:10:19,061 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 68 [2019-01-18 18:10:19,196 INFO L303 Elim1Store]: Index analysis took 132 ms [2019-01-18 18:10:19,197 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 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 32 treesize of output 67 [2019-01-18 18:10:19,198 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-18 18:10:19,567 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:19,852 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:20,038 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:20,209 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:20,379 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:20,438 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 43 treesize of output 39 [2019-01-18 18:10:20,453 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:20,455 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:20,456 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 36 treesize of output 49 [2019-01-18 18:10:20,495 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:20,496 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:20,497 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:20,498 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:20,499 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 32 treesize of output 57 [2019-01-18 18:10:20,537 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:20,538 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:20,539 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:20,540 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:20,541 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:20,544 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:20,544 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 37 [2019-01-18 18:10:20,545 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-01-18 18:10:20,560 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:20,575 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:20,591 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:20,622 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 18:10:20,622 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 5 variables, input treesize:64, output treesize:67 [2019-01-18 18:10:20,802 WARN L181 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2019-01-18 18:10:20,817 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:20,855 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 10 case distinctions, treesize of input 41 treesize of output 87 [2019-01-18 18:10:20,862 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 32 xjuncts. [2019-01-18 18:10:21,213 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 21 dim-0 vars, and 7 xjuncts. [2019-01-18 18:10:21,213 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:77, output treesize:349 [2019-01-18 18:10:21,314 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:21,315 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:21,316 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:21,316 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:21,317 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:21,318 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:21,319 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 63 [2019-01-18 18:10:21,319 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:10:21,403 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:21,404 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:21,405 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:21,406 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:21,408 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:21,409 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:21,410 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:21,411 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 92 [2019-01-18 18:10:21,412 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-01-18 18:10:21,490 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:21,492 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:21,493 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:21,494 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:21,496 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:21,496 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 18:10:21,497 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 72 [2019-01-18 18:10:21,497 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-01-18 18:10:21,557 INFO L267 ElimStorePlain]: Start of recursive call 1: 11 dim-0 vars, 3 dim-1 vars, End of recursive call: 11 dim-0 vars, and 3 xjuncts. [2019-01-18 18:10:21,558 INFO L202 ElimStorePlain]: Needed 4 recursive calls to eliminate 14 variables, input treesize:162, output treesize:126 [2019-01-18 18:10:24,002 WARN L181 SmtUtils]: Spent 2.43 s on a formula simplification that was a NOOP. DAG size: 79 [2019-01-18 18:10:24,005 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:10:24,006 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 18:10:24,043 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:10:24,061 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 18:10:24,061 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-18 18:10:24,062 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 18:10:24,062 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-18 18:10:24,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-18 18:10:24,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2019-01-18 18:10:24,062 INFO L87 Difference]: Start difference. First operand 221 states and 1389 transitions. Second operand 8 states. [2019-01-18 18:10:24,489 WARN L181 SmtUtils]: Spent 417.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 44 [2019-01-18 18:10:26,965 WARN L181 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 70 [2019-01-18 18:10:39,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:10:39,882 INFO L93 Difference]: Finished difference Result 273 states and 1446 transitions. [2019-01-18 18:10:39,882 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-01-18 18:10:39,882 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 5 [2019-01-18 18:10:39,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:10:39,886 INFO L225 Difference]: With dead ends: 273 [2019-01-18 18:10:39,886 INFO L226 Difference]: Without dead ends: 272 [2019-01-18 18:10:39,886 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=79, Invalid=129, Unknown=2, NotChecked=0, Total=210 [2019-01-18 18:10:39,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2019-01-18 18:10:39,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 222. [2019-01-18 18:10:39,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 222 states. [2019-01-18 18:10:39,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 1396 transitions. [2019-01-18 18:10:39,924 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 1396 transitions. Word has length 5 [2019-01-18 18:10:39,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:10:39,924 INFO L480 AbstractCegarLoop]: Abstraction has 222 states and 1396 transitions. [2019-01-18 18:10:39,924 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-18 18:10:39,924 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 1396 transitions. [2019-01-18 18:10:39,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-18 18:10:39,925 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:10:39,925 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-01-18 18:10:39,925 INFO L423 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:10:39,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:10:39,925 INFO L82 PathProgramCache]: Analyzing trace with hash 29353958, now seen corresponding path program 2 times [2019-01-18 18:10:39,925 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:10:39,926 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:10:39,926 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:10:39,926 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:10:39,926 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:10:39,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:10:40,055 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:10:40,056 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:10:40,056 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 18:10:40,056 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-18 18:10:40,056 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-18 18:10:40,056 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:10:40,057 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 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 18:10:40,066 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-01-18 18:10:40,066 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-01-18 18:10:40,073 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-01-18 18:10:40,073 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-18 18:10:40,074 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 18:10:40,094 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 21 treesize of output 24 [2019-01-18 18:10:40,097 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 24 treesize of output 30 [2019-01-18 18:10:40,102 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:40,103 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:40,104 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 26 treesize of output 40 [2019-01-18 18:10:40,107 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:40,108 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:40,109 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:40,110 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 28 treesize of output 54 [2019-01-18 18:10:40,113 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:40,114 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:40,115 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:40,117 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:40,117 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 30 treesize of output 72 [2019-01-18 18:10:40,122 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:40,123 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:40,123 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:40,125 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:40,126 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:40,127 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 91 [2019-01-18 18:10:40,127 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-18 18:10:40,175 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:40,203 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:40,227 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:40,244 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:40,261 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:40,297 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:40,297 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 68 treesize of output 71 [2019-01-18 18:10:40,338 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:40,340 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:40,341 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2019-01-18 18:10:40,383 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:40,385 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:40,387 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:40,388 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:40,389 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 46 treesize of output 72 [2019-01-18 18:10:40,445 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:40,449 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:40,450 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:40,451 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:40,452 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:40,453 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:40,454 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 37 treesize of output 80 [2019-01-18 18:10:40,517 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:40,519 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:40,520 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:40,521 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:40,522 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:40,523 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:40,524 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:40,525 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:40,526 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 31 treesize of output 61 [2019-01-18 18:10:40,526 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2019-01-18 18:10:40,554 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:40,579 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:40,605 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:40,631 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:40,677 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 18:10:40,677 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 5 variables, input treesize:92, output treesize:91 [2019-01-18 18:10:40,707 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:40,708 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 41 treesize of output 97 [2019-01-18 18:10:40,708 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:10:40,752 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-18 18:10:40,752 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:101, output treesize:71 [2019-01-18 18:10:40,777 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:40,778 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:40,779 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:40,780 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:40,782 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:40,783 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:40,784 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:40,784 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 18:10:40,785 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 43 treesize of output 112 [2019-01-18 18:10:40,786 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:10:40,832 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. [2019-01-18 18:10:40,832 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:83, output treesize:59 [2019-01-18 18:10:40,856 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:40,857 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:40,858 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:40,859 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:40,859 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:40,860 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:40,861 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:40,863 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:40,864 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:40,865 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:40,866 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:40,867 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 45 treesize of output 115 [2019-01-18 18:10:40,867 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:10:40,915 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. [2019-01-18 18:10:40,915 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:73, output treesize:51 [2019-01-18 18:10:40,936 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:10:40,936 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 18:10:40,962 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:10:40,981 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 18:10:40,981 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2019-01-18 18:10:40,981 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 18:10:40,982 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-01-18 18:10:40,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-01-18 18:10:40,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2019-01-18 18:10:40,982 INFO L87 Difference]: Start difference. First operand 222 states and 1396 transitions. Second operand 10 states. [2019-01-18 18:10:41,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:10:41,745 INFO L93 Difference]: Finished difference Result 274 states and 1519 transitions. [2019-01-18 18:10:41,745 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-01-18 18:10:41,745 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2019-01-18 18:10:41,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:10:41,749 INFO L225 Difference]: With dead ends: 274 [2019-01-18 18:10:41,749 INFO L226 Difference]: Without dead ends: 273 [2019-01-18 18:10:41,749 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2019-01-18 18:10:41,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2019-01-18 18:10:41,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 225. [2019-01-18 18:10:41,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 225 states. [2019-01-18 18:10:41,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 1417 transitions. [2019-01-18 18:10:41,791 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 1417 transitions. Word has length 5 [2019-01-18 18:10:41,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:10:41,791 INFO L480 AbstractCegarLoop]: Abstraction has 225 states and 1417 transitions. [2019-01-18 18:10:41,791 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-01-18 18:10:41,792 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 1417 transitions. [2019-01-18 18:10:41,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-18 18:10:41,792 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:10:41,792 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-01-18 18:10:41,792 INFO L423 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:10:41,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:10:41,793 INFO L82 PathProgramCache]: Analyzing trace with hash 29372004, now seen corresponding path program 1 times [2019-01-18 18:10:41,793 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:10:41,793 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:10:41,793 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-18 18:10:41,793 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:10:41,793 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:10:41,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:10:41,849 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:10:41,849 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:10:41,849 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 18:10:41,849 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-01-18 18:10:41,850 INFO L207 CegarAbsIntRunner]: [0], [24], [28], [30], [31] [2019-01-18 18:10:41,850 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-18 18:10:41,851 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 18:10:43,085 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 18:10:43,086 INFO L272 AbstractInterpreter]: Visited 5 different actions 13 times. Merged at 1 different actions 4 times. Widened at 1 different actions 1 times. Found 5 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-18 18:10:43,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:10:43,086 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 18:10:43,086 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:10:43,086 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 18:10:43,094 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:10:43,094 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 18:10:43,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:10:43,100 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 18:10:43,107 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 63 treesize of output 56 [2019-01-18 18:10:43,132 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:43,136 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:43,136 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 53 treesize of output 63 [2019-01-18 18:10:43,185 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:43,186 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:43,189 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:43,190 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:43,191 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 46 treesize of output 68 [2019-01-18 18:10:43,239 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:43,239 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:43,240 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:43,241 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:43,243 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:43,245 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:43,246 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 76 [2019-01-18 18:10:43,303 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:43,304 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:43,306 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:43,307 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:43,308 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:43,309 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:43,310 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:43,313 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:43,313 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2019-01-18 18:10:43,314 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2019-01-18 18:10:43,340 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:43,365 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:43,390 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:43,418 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:43,452 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-01-18 18:10:43,455 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 8 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2019-01-18 18:10:43,459 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 11 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 36 [2019-01-18 18:10:43,463 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 13 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 50 [2019-01-18 18:10:43,467 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 14 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 68 [2019-01-18 18:10:43,471 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 14 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 87 [2019-01-18 18:10:43,472 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2019-01-18 18:10:43,506 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:43,525 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:43,539 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:43,551 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:43,563 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:43,606 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. [2019-01-18 18:10:43,607 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 6 variables, input treesize:84, output treesize:87 [2019-01-18 18:10:43,627 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:43,627 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 93 [2019-01-18 18:10:43,628 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:10:43,670 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. [2019-01-18 18:10:43,671 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:97, output treesize:67 [2019-01-18 18:10:43,687 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:10:43,687 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 18:10:43,698 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:10:43,715 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 18:10:43,716 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-01-18 18:10:43,716 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 18:10:43,716 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-01-18 18:10:43,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-01-18 18:10:43,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-01-18 18:10:43,716 INFO L87 Difference]: Start difference. First operand 225 states and 1417 transitions. Second operand 6 states. [2019-01-18 18:10:43,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:10:43,924 INFO L93 Difference]: Finished difference Result 242 states and 1433 transitions. [2019-01-18 18:10:43,924 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-01-18 18:10:43,924 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 5 [2019-01-18 18:10:43,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:10:43,927 INFO L225 Difference]: With dead ends: 242 [2019-01-18 18:10:43,927 INFO L226 Difference]: Without dead ends: 241 [2019-01-18 18:10:43,928 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2019-01-18 18:10:43,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2019-01-18 18:10:43,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 225. [2019-01-18 18:10:43,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 225 states. [2019-01-18 18:10:43,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 1417 transitions. [2019-01-18 18:10:43,968 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 1417 transitions. Word has length 5 [2019-01-18 18:10:43,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:10:43,968 INFO L480 AbstractCegarLoop]: Abstraction has 225 states and 1417 transitions. [2019-01-18 18:10:43,968 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-01-18 18:10:43,969 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 1417 transitions. [2019-01-18 18:10:43,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-18 18:10:43,969 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:10:43,970 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-01-18 18:10:43,970 INFO L423 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:10:43,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:10:43,970 INFO L82 PathProgramCache]: Analyzing trace with hash 29357926, now seen corresponding path program 1 times [2019-01-18 18:10:43,970 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:10:43,971 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:10:43,971 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:10:43,971 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:10:43,971 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:10:43,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:10:44,343 WARN L181 SmtUtils]: Spent 335.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 19 [2019-01-18 18:10:44,416 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:10:44,416 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:10:44,416 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 18:10:44,416 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-01-18 18:10:44,416 INFO L207 CegarAbsIntRunner]: [0], [10], [14], [24], [27] [2019-01-18 18:10:44,417 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-18 18:10:44,417 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 18:10:45,071 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 18:10:45,071 INFO L272 AbstractInterpreter]: Visited 5 different actions 13 times. Merged at 2 different actions 2 times. Never widened. Found 9 fixpoints after 4 different actions. Largest state had 0 variables. [2019-01-18 18:10:45,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:10:45,071 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 18:10:45,071 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:10:45,071 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 18:10:45,080 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:10:45,080 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 18:10:45,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:10:45,085 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 18:10:45,117 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:45,117 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 68 treesize of output 71 [2019-01-18 18:10:45,167 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:45,168 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:45,169 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 58 treesize of output 67 [2019-01-18 18:10:45,211 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:45,213 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:45,214 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:45,215 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:45,216 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 46 treesize of output 72 [2019-01-18 18:10:45,264 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:45,265 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:45,266 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:45,268 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:45,269 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:45,270 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:45,271 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 37 treesize of output 80 [2019-01-18 18:10:45,345 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:45,347 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:45,348 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:45,349 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:45,350 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:45,351 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:45,352 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:45,354 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:45,355 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 31 treesize of output 61 [2019-01-18 18:10:45,355 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2019-01-18 18:10:45,381 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:45,406 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:45,429 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:45,457 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:45,492 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-01-18 18:10:45,494 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2019-01-18 18:10:45,498 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2019-01-18 18:10:45,500 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 14 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2019-01-18 18:10:45,503 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 15 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2019-01-18 18:10:45,505 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 91 [2019-01-18 18:10:45,506 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2019-01-18 18:10:45,543 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:45,563 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:45,579 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:45,592 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:45,604 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:45,651 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-01-18 18:10:45,652 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 4 variables, input treesize:92, output treesize:91 [2019-01-18 18:10:45,687 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:45,688 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 41 treesize of output 97 [2019-01-18 18:10:45,688 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:10:45,735 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 18:10:45,736 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:101, output treesize:71 [2019-01-18 18:10:45,762 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:45,762 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:45,763 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:45,764 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:45,765 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:45,766 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:45,767 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:45,768 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:45,769 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 43 treesize of output 113 [2019-01-18 18:10:45,770 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:10:45,817 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-18 18:10:45,817 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:83, output treesize:57 [2019-01-18 18:10:45,846 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:45,847 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:45,847 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:45,849 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:45,850 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:45,851 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:45,852 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:45,853 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:45,854 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:45,855 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:45,856 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:45,857 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:45,858 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:45,859 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 18:10:45,860 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 43 treesize of output 128 [2019-01-18 18:10:45,860 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:10:45,911 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. [2019-01-18 18:10:45,911 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:67, output treesize:47 [2019-01-18 18:10:45,933 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:10:45,933 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 18:10:45,973 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:10:45,990 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 18:10:45,991 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2019-01-18 18:10:45,991 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 18:10:45,991 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-01-18 18:10:45,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-01-18 18:10:45,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2019-01-18 18:10:45,991 INFO L87 Difference]: Start difference. First operand 225 states and 1417 transitions. Second operand 10 states. [2019-01-18 18:10:46,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:10:46,625 INFO L93 Difference]: Finished difference Result 276 states and 1527 transitions. [2019-01-18 18:10:46,625 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-01-18 18:10:46,625 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2019-01-18 18:10:46,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:10:46,629 INFO L225 Difference]: With dead ends: 276 [2019-01-18 18:10:46,629 INFO L226 Difference]: Without dead ends: 274 [2019-01-18 18:10:46,630 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=99, Invalid=173, Unknown=0, NotChecked=0, Total=272 [2019-01-18 18:10:46,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2019-01-18 18:10:46,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 234. [2019-01-18 18:10:46,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 234 states. [2019-01-18 18:10:46,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 1480 transitions. [2019-01-18 18:10:46,676 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 1480 transitions. Word has length 5 [2019-01-18 18:10:46,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:10:46,676 INFO L480 AbstractCegarLoop]: Abstraction has 234 states and 1480 transitions. [2019-01-18 18:10:46,677 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-01-18 18:10:46,677 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 1480 transitions. [2019-01-18 18:10:46,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-18 18:10:46,677 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:10:46,677 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-01-18 18:10:46,677 INFO L423 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:10:46,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:10:46,678 INFO L82 PathProgramCache]: Analyzing trace with hash 28933724, now seen corresponding path program 1 times [2019-01-18 18:10:46,678 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:10:46,678 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:10:46,678 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:10:46,678 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:10:46,678 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:10:46,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:10:46,751 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:10:46,751 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:10:46,752 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 18:10:46,752 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-01-18 18:10:46,752 INFO L207 CegarAbsIntRunner]: [0], [6], [10], [28], [29] [2019-01-18 18:10:46,753 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-18 18:10:46,753 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 18:10:46,972 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 18:10:46,972 INFO L272 AbstractInterpreter]: Visited 5 different actions 8 times. Merged at 1 different actions 1 times. Never widened. Found 4 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-18 18:10:46,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:10:46,973 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 18:10:46,973 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:10:46,973 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 18:10:46,993 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:10:46,993 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 18:10:46,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:10:46,999 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 18:10:47,024 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:47,024 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 48 treesize of output 54 [2019-01-18 18:10:47,071 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:47,072 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:47,072 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 41 treesize of output 53 [2019-01-18 18:10:47,108 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:47,109 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:47,110 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:47,111 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:47,112 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 32 treesize of output 61 [2019-01-18 18:10:47,155 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:47,156 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:47,157 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:47,158 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:47,159 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:47,160 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:47,161 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 41 [2019-01-18 18:10:47,162 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2019-01-18 18:10:47,179 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:47,195 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:47,211 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:47,236 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-01-18 18:10:47,239 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2019-01-18 18:10:47,242 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2019-01-18 18:10:47,244 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2019-01-18 18:10:47,248 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 30 treesize of output 72 [2019-01-18 18:10:47,256 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 71 [2019-01-18 18:10:47,257 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-01-18 18:10:47,283 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:47,303 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:47,319 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:47,332 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:47,344 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:47,377 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. [2019-01-18 18:10:47,378 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 6 variables, input treesize:72, output treesize:71 [2019-01-18 18:10:47,448 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:47,449 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 72 [2019-01-18 18:10:47,450 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:10:47,547 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 18:10:47,548 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:76, output treesize:50 [2019-01-18 18:10:47,566 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:47,567 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:47,568 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:47,569 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:47,571 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:47,572 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:47,573 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:47,574 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 88 [2019-01-18 18:10:47,574 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:10:47,607 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-18 18:10:47,608 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:62, output treesize:40 [2019-01-18 18:10:47,623 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:10:47,624 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 18:10:47,643 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:10:47,662 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 18:10:47,662 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-18 18:10:47,662 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 18:10:47,662 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-18 18:10:47,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-18 18:10:47,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2019-01-18 18:10:47,663 INFO L87 Difference]: Start difference. First operand 234 states and 1480 transitions. Second operand 8 states. [2019-01-18 18:10:48,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:10:48,048 INFO L93 Difference]: Finished difference Result 288 states and 1635 transitions. [2019-01-18 18:10:48,048 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-01-18 18:10:48,048 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 5 [2019-01-18 18:10:48,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:10:48,052 INFO L225 Difference]: With dead ends: 288 [2019-01-18 18:10:48,053 INFO L226 Difference]: Without dead ends: 287 [2019-01-18 18:10:48,053 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2019-01-18 18:10:48,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2019-01-18 18:10:48,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 250. [2019-01-18 18:10:48,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 250 states. [2019-01-18 18:10:48,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 1595 transitions. [2019-01-18 18:10:48,110 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 1595 transitions. Word has length 5 [2019-01-18 18:10:48,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:10:48,110 INFO L480 AbstractCegarLoop]: Abstraction has 250 states and 1595 transitions. [2019-01-18 18:10:48,110 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-18 18:10:48,110 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 1595 transitions. [2019-01-18 18:10:48,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-18 18:10:48,111 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:10:48,111 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-01-18 18:10:48,111 INFO L423 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:10:48,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:10:48,112 INFO L82 PathProgramCache]: Analyzing trace with hash 28941412, now seen corresponding path program 1 times [2019-01-18 18:10:48,112 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:10:48,112 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:10:48,113 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:10:48,113 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:10:48,113 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:10:48,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:10:48,229 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:10:48,229 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:10:48,229 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 18:10:48,229 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-01-18 18:10:48,230 INFO L207 CegarAbsIntRunner]: [0], [10], [14], [28], [29] [2019-01-18 18:10:48,231 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-18 18:10:48,231 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 18:10:48,438 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 18:10:48,438 INFO L272 AbstractInterpreter]: Visited 5 different actions 8 times. Merged at 1 different actions 1 times. Never widened. Found 4 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-18 18:10:48,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:10:48,439 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 18:10:48,439 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:10:48,439 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 18:10:48,446 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:10:48,446 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 18:10:48,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:10:48,451 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 18:10:48,458 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 21 treesize of output 24 [2019-01-18 18:10:48,463 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 24 treesize of output 26 [2019-01-18 18:10:48,478 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:48,479 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:48,479 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 26 treesize of output 36 [2019-01-18 18:10:48,493 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:48,496 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:48,498 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:48,498 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 28 treesize of output 50 [2019-01-18 18:10:48,504 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:48,509 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:48,511 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:48,513 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:48,513 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 68 [2019-01-18 18:10:48,530 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 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 32 treesize of output 67 [2019-01-18 18:10:48,531 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-18 18:10:48,557 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:48,577 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:48,592 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:48,605 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:48,618 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:48,640 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 43 treesize of output 39 [2019-01-18 18:10:48,654 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:48,656 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:48,657 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 36 treesize of output 49 [2019-01-18 18:10:48,688 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:48,689 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:48,691 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:48,692 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:48,693 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 32 treesize of output 57 [2019-01-18 18:10:48,731 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:48,733 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:48,734 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:48,735 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:48,736 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:48,738 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:48,739 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 37 [2019-01-18 18:10:48,739 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-01-18 18:10:48,752 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:48,766 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:48,782 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:48,811 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. [2019-01-18 18:10:48,812 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 6 variables, input treesize:64, output treesize:67 [2019-01-18 18:10:48,842 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:48,851 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 72 [2019-01-18 18:10:48,852 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-01-18 18:10:48,941 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 2 xjuncts. [2019-01-18 18:10:48,942 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:72, output treesize:92 [2019-01-18 18:10:48,974 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:48,975 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:48,975 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:48,976 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:48,977 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:48,978 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 67 [2019-01-18 18:10:48,979 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:10:49,000 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 18:10:49,001 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:49, output treesize:27 [2019-01-18 18:10:49,014 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:10:49,014 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 18:10:49,027 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:10:49,046 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 18:10:49,046 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 8 [2019-01-18 18:10:49,046 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 18:10:49,047 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-18 18:10:49,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-18 18:10:49,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2019-01-18 18:10:49,047 INFO L87 Difference]: Start difference. First operand 250 states and 1595 transitions. Second operand 8 states. [2019-01-18 18:10:49,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:10:49,439 INFO L93 Difference]: Finished difference Result 319 states and 1823 transitions. [2019-01-18 18:10:49,439 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-01-18 18:10:49,440 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 5 [2019-01-18 18:10:49,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:10:49,444 INFO L225 Difference]: With dead ends: 319 [2019-01-18 18:10:49,444 INFO L226 Difference]: Without dead ends: 318 [2019-01-18 18:10:49,445 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2019-01-18 18:10:49,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2019-01-18 18:10:49,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 276. [2019-01-18 18:10:49,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 276 states. [2019-01-18 18:10:49,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 1782 transitions. [2019-01-18 18:10:49,503 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 1782 transitions. Word has length 5 [2019-01-18 18:10:49,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:10:49,503 INFO L480 AbstractCegarLoop]: Abstraction has 276 states and 1782 transitions. [2019-01-18 18:10:49,503 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-18 18:10:49,504 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 1782 transitions. [2019-01-18 18:10:49,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-01-18 18:10:49,505 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:10:49,505 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2019-01-18 18:10:49,505 INFO L423 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:10:49,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:10:49,506 INFO L82 PathProgramCache]: Analyzing trace with hash 904691166, now seen corresponding path program 1 times [2019-01-18 18:10:49,506 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:10:49,506 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:10:49,506 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:10:49,506 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:10:49,506 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:10:49,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:10:49,686 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-01-18 18:10:49,686 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:10:49,687 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 18:10:49,687 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2019-01-18 18:10:49,687 INFO L207 CegarAbsIntRunner]: [0], [18], [28], [30], [31] [2019-01-18 18:10:49,688 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-18 18:10:49,688 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 18:10:49,989 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 18:10:49,989 INFO L272 AbstractInterpreter]: Visited 5 different actions 7 times. Merged at 1 different actions 1 times. Never widened. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-18 18:10:49,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:10:49,990 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 18:10:49,990 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:10:49,990 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 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 18:10:50,002 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:10:50,002 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 18:10:50,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:10:50,028 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 18:10:50,045 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 43 treesize of output 39 [2019-01-18 18:10:50,143 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:50,148 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:50,148 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 36 treesize of output 49 [2019-01-18 18:10:50,178 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:50,179 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:50,182 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:50,184 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:50,184 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 32 treesize of output 57 [2019-01-18 18:10:50,224 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:50,225 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:50,227 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:50,228 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:50,230 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:50,234 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:50,234 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 37 [2019-01-18 18:10:50,235 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2019-01-18 18:10:50,256 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:50,275 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:50,300 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:50,328 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-01-18 18:10:50,334 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2019-01-18 18:10:50,338 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 36 [2019-01-18 18:10:50,343 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 9 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 50 [2019-01-18 18:10:50,349 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 68 [2019-01-18 18:10:50,360 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 67 [2019-01-18 18:10:50,361 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-01-18 18:10:50,388 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:50,411 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:50,426 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:50,437 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:50,452 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:50,506 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. [2019-01-18 18:10:50,506 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 6 variables, input treesize:64, output treesize:67 [2019-01-18 18:10:50,561 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:50,561 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 62 [2019-01-18 18:10:50,562 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:10:50,585 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 18:10:50,585 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:72, output treesize:46 [2019-01-18 18:10:50,603 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:50,604 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:50,605 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:50,606 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:50,608 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:50,610 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:50,611 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:50,612 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 74 [2019-01-18 18:10:50,612 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:10:50,639 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-18 18:10:50,640 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:58, output treesize:46 [2019-01-18 18:10:50,655 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:10:50,655 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 18:10:50,671 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:10:50,691 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 18:10:50,691 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 3, 3] total 8 [2019-01-18 18:10:50,691 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 18:10:50,691 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-01-18 18:10:50,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-01-18 18:10:50,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2019-01-18 18:10:50,692 INFO L87 Difference]: Start difference. First operand 276 states and 1782 transitions. Second operand 7 states. [2019-01-18 18:10:50,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:10:50,904 INFO L93 Difference]: Finished difference Result 290 states and 1801 transitions. [2019-01-18 18:10:50,904 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-18 18:10:50,904 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 6 [2019-01-18 18:10:50,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:10:50,908 INFO L225 Difference]: With dead ends: 290 [2019-01-18 18:10:50,908 INFO L226 Difference]: Without dead ends: 289 [2019-01-18 18:10:50,908 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2019-01-18 18:10:50,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2019-01-18 18:10:50,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 276. [2019-01-18 18:10:50,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 276 states. [2019-01-18 18:10:50,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 1782 transitions. [2019-01-18 18:10:50,974 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 1782 transitions. Word has length 6 [2019-01-18 18:10:50,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:10:50,974 INFO L480 AbstractCegarLoop]: Abstraction has 276 states and 1782 transitions. [2019-01-18 18:10:50,974 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-01-18 18:10:50,974 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 1782 transitions. [2019-01-18 18:10:50,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-01-18 18:10:50,976 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:10:50,976 INFO L402 BasicCegarLoop]: trace histogram [3, 1, 1, 1] [2019-01-18 18:10:50,976 INFO L423 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:10:50,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:10:50,976 INFO L82 PathProgramCache]: Analyzing trace with hash 904323688, now seen corresponding path program 3 times [2019-01-18 18:10:50,976 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:10:50,977 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:10:50,977 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:10:50,977 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:10:50,978 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:10:50,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:10:51,095 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-01-18 18:10:51,095 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:10:51,095 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 18:10:51,095 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-18 18:10:51,095 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-18 18:10:51,096 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:10:51,096 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 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 18:10:51,106 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-01-18 18:10:51,106 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2019-01-18 18:10:51,111 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-01-18 18:10:51,112 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-18 18:10:51,113 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 18:10:51,134 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 21 treesize of output 24 [2019-01-18 18:10:51,136 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 24 treesize of output 30 [2019-01-18 18:10:51,139 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:51,141 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:51,141 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 26 treesize of output 40 [2019-01-18 18:10:51,146 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:51,147 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:51,148 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:51,149 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 28 treesize of output 54 [2019-01-18 18:10:51,154 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:51,155 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:51,155 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:51,156 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:51,157 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 30 treesize of output 72 [2019-01-18 18:10:51,171 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 71 [2019-01-18 18:10:51,171 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-18 18:10:51,199 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:51,221 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:51,239 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:51,253 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:51,267 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:51,296 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:51,297 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 48 treesize of output 54 [2019-01-18 18:10:51,328 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:51,329 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:51,330 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 41 treesize of output 53 [2019-01-18 18:10:51,364 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:51,365 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:51,366 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:51,367 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:51,368 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 32 treesize of output 61 [2019-01-18 18:10:51,411 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:51,412 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:51,413 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:51,414 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:51,416 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:51,417 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:51,417 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 41 [2019-01-18 18:10:51,418 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-01-18 18:10:51,434 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:51,450 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:51,466 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:51,499 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. [2019-01-18 18:10:51,500 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 6 variables, input treesize:72, output treesize:71 [2019-01-18 18:10:51,540 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:51,541 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 66 [2019-01-18 18:10:51,541 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:10:51,568 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 18:10:51,568 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:76, output treesize:50 [2019-01-18 18:10:51,585 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:51,586 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:51,586 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:51,587 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:51,588 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:51,589 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:51,590 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:51,591 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 88 [2019-01-18 18:10:51,591 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:10:51,624 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 18:10:51,624 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:62, output treesize:40 [2019-01-18 18:10:51,643 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:51,644 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:51,644 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:51,646 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:51,647 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:51,648 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:51,649 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:51,650 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:51,651 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:51,652 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:51,653 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:51,654 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:51,655 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:51,656 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 16 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 98 [2019-01-18 18:10:51,656 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:10:51,693 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 18:10:51,693 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:50, output treesize:38 [2019-01-18 18:10:51,712 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:51,713 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:51,714 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:51,715 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:51,716 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:51,717 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:51,719 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:51,720 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:51,721 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:51,722 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:51,723 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:51,724 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:51,725 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:51,726 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 16 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 98 [2019-01-18 18:10:51,727 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:10:51,766 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-18 18:10:51,767 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:50, output treesize:38 [2019-01-18 18:10:51,784 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:10:51,785 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 18:10:51,818 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:10:51,838 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 18:10:51,838 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 13 [2019-01-18 18:10:51,838 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 18:10:51,839 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-01-18 18:10:51,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-01-18 18:10:51,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2019-01-18 18:10:51,839 INFO L87 Difference]: Start difference. First operand 276 states and 1782 transitions. Second operand 11 states. [2019-01-18 18:10:52,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:10:52,472 INFO L93 Difference]: Finished difference Result 423 states and 2543 transitions. [2019-01-18 18:10:52,472 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-01-18 18:10:52,473 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 6 [2019-01-18 18:10:52,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:10:52,477 INFO L225 Difference]: With dead ends: 423 [2019-01-18 18:10:52,477 INFO L226 Difference]: Without dead ends: 421 [2019-01-18 18:10:52,478 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=92, Invalid=148, Unknown=0, NotChecked=0, Total=240 [2019-01-18 18:10:52,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2019-01-18 18:10:52,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 325. [2019-01-18 18:10:52,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 325 states. [2019-01-18 18:10:52,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 2130 transitions. [2019-01-18 18:10:52,610 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 2130 transitions. Word has length 6 [2019-01-18 18:10:52,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:10:52,611 INFO L480 AbstractCegarLoop]: Abstraction has 325 states and 2130 transitions. [2019-01-18 18:10:52,611 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-01-18 18:10:52,611 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 2130 transitions. [2019-01-18 18:10:52,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-01-18 18:10:52,613 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:10:52,613 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-01-18 18:10:52,613 INFO L423 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:10:52,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:10:52,614 INFO L82 PathProgramCache]: Analyzing trace with hash 904327844, now seen corresponding path program 1 times [2019-01-18 18:10:52,614 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:10:52,615 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:10:52,615 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-18 18:10:52,615 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:10:52,615 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:10:52,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:10:52,764 WARN L181 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2019-01-18 18:10:53,031 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-01-18 18:10:53,031 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:10:53,031 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 18:10:53,031 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2019-01-18 18:10:53,032 INFO L207 CegarAbsIntRunner]: [0], [6], [18], [22], [28], [29] [2019-01-18 18:10:53,037 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-18 18:10:53,037 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 18:10:53,309 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 18:10:53,309 INFO L272 AbstractInterpreter]: Visited 6 different actions 10 times. Merged at 1 different actions 1 times. Never widened. Found 6 fixpoints after 4 different actions. Largest state had 0 variables. [2019-01-18 18:10:53,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:10:53,309 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 18:10:53,309 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:10:53,309 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 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 18:10:53,318 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:10:53,319 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 18:10:53,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:10:53,325 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 18:10:53,355 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 21 treesize of output 24 [2019-01-18 18:10:53,358 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 24 treesize of output 30 [2019-01-18 18:10:53,369 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:53,372 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:53,372 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 26 treesize of output 40 [2019-01-18 18:10:53,380 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:53,383 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:53,384 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:53,384 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 28 treesize of output 54 [2019-01-18 18:10:53,387 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:53,389 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:53,390 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:53,391 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:53,391 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 30 treesize of output 72 [2019-01-18 18:10:53,395 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:53,396 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:53,397 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:53,399 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:53,400 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:53,401 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 91 [2019-01-18 18:10:53,402 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-18 18:10:53,443 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:53,466 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:53,530 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:53,544 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:53,559 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:53,593 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:53,593 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 68 treesize of output 71 [2019-01-18 18:10:53,632 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:53,633 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:53,634 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 58 treesize of output 67 [2019-01-18 18:10:53,677 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:53,679 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:53,680 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:53,681 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:53,682 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 46 treesize of output 72 [2019-01-18 18:10:53,733 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:53,734 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:53,736 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:53,737 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:53,738 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:53,739 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:53,740 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 37 treesize of output 80 [2019-01-18 18:10:53,805 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:53,806 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:53,807 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:53,808 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:53,809 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:53,810 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:53,812 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:53,813 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:53,813 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 31 treesize of output 61 [2019-01-18 18:10:53,814 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2019-01-18 18:10:53,839 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:53,865 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:53,890 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:53,917 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:53,964 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-01-18 18:10:53,965 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 4 variables, input treesize:92, output treesize:91 [2019-01-18 18:10:53,996 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:53,996 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 41 treesize of output 91 [2019-01-18 18:10:53,996 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:10:54,041 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 18:10:54,042 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:101, output treesize:71 [2019-01-18 18:10:54,070 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:54,071 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:54,072 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:54,073 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:54,074 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:54,075 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:54,076 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:54,077 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:54,078 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 43 treesize of output 113 [2019-01-18 18:10:54,079 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:10:54,156 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-18 18:10:54,157 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:83, output treesize:57 [2019-01-18 18:10:54,184 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:54,185 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:54,186 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:54,187 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:54,189 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:54,190 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:54,191 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:54,192 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:54,193 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:54,194 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:54,195 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:54,197 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:54,198 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:54,199 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:54,199 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 18:10:54,200 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 43 treesize of output 119 [2019-01-18 18:10:54,201 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:10:54,251 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. [2019-01-18 18:10:54,252 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:67, output treesize:49 [2019-01-18 18:10:54,273 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:10:54,273 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 18:10:54,413 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:10:54,431 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 18:10:54,431 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2019-01-18 18:10:54,431 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 18:10:54,431 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-01-18 18:10:54,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-01-18 18:10:54,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2019-01-18 18:10:54,432 INFO L87 Difference]: Start difference. First operand 325 states and 2130 transitions. Second operand 10 states. [2019-01-18 18:10:55,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:10:55,053 INFO L93 Difference]: Finished difference Result 368 states and 2210 transitions. [2019-01-18 18:10:55,053 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-01-18 18:10:55,054 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 6 [2019-01-18 18:10:55,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:10:55,057 INFO L225 Difference]: With dead ends: 368 [2019-01-18 18:10:55,058 INFO L226 Difference]: Without dead ends: 366 [2019-01-18 18:10:55,058 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=98, Invalid=174, Unknown=0, NotChecked=0, Total=272 [2019-01-18 18:10:55,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2019-01-18 18:10:55,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 329. [2019-01-18 18:10:55,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 329 states. [2019-01-18 18:10:55,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 2135 transitions. [2019-01-18 18:10:55,122 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 2135 transitions. Word has length 6 [2019-01-18 18:10:55,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:10:55,122 INFO L480 AbstractCegarLoop]: Abstraction has 329 states and 2135 transitions. [2019-01-18 18:10:55,122 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-01-18 18:10:55,123 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 2135 transitions. [2019-01-18 18:10:55,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-01-18 18:10:55,124 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:10:55,124 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2019-01-18 18:10:55,124 INFO L423 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:10:55,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:10:55,124 INFO L82 PathProgramCache]: Analyzing trace with hash 904329640, now seen corresponding path program 3 times [2019-01-18 18:10:55,124 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:10:55,125 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:10:55,125 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:10:55,125 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:10:55,125 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:10:55,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:10:55,178 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-01-18 18:10:55,179 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:10:55,179 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 18:10:55,179 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-18 18:10:55,179 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-18 18:10:55,179 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:10:55,179 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 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 18:10:55,190 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-01-18 18:10:55,190 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2019-01-18 18:10:55,198 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-01-18 18:10:55,198 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-18 18:10:55,199 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 18:10:55,224 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 21 treesize of output 24 [2019-01-18 18:10:55,226 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 24 treesize of output 30 [2019-01-18 18:10:55,234 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:55,236 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:55,236 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 26 treesize of output 40 [2019-01-18 18:10:55,244 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:55,247 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:55,250 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:55,250 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 28 treesize of output 54 [2019-01-18 18:10:55,259 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:55,261 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:55,263 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:55,265 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:55,265 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 30 treesize of output 72 [2019-01-18 18:10:55,269 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:55,270 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:55,274 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:55,275 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:55,276 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:55,276 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 91 [2019-01-18 18:10:55,277 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-18 18:10:55,318 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:55,342 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:55,361 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:55,376 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:55,390 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:55,423 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:55,424 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 68 treesize of output 71 [2019-01-18 18:10:55,460 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:55,461 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:55,462 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 58 treesize of output 67 [2019-01-18 18:10:55,502 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:55,503 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:55,505 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:55,506 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:55,506 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 46 treesize of output 72 [2019-01-18 18:10:55,556 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:55,558 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:55,559 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:55,560 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:55,561 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:55,562 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:55,563 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 37 treesize of output 80 [2019-01-18 18:10:55,629 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:55,631 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:55,632 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:55,633 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:55,634 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:55,637 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:55,638 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:55,638 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:55,639 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 31 treesize of output 61 [2019-01-18 18:10:55,639 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2019-01-18 18:10:55,664 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:55,691 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:55,717 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:55,743 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:55,789 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 18:10:55,789 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 5 variables, input treesize:92, output treesize:91 [2019-01-18 18:10:55,816 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:55,817 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 41 treesize of output 91 [2019-01-18 18:10:55,818 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:10:55,860 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-18 18:10:55,861 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:101, output treesize:71 [2019-01-18 18:10:55,887 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:55,888 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:55,889 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:55,890 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:55,891 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:55,892 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:55,893 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:55,894 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:55,895 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 43 treesize of output 113 [2019-01-18 18:10:55,896 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:10:55,945 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-18 18:10:55,945 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:83, output treesize:57 [2019-01-18 18:10:55,968 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:55,969 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:55,970 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:55,971 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:55,972 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:55,973 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:55,974 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:55,975 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:55,977 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:55,978 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:55,979 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:55,979 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 18:10:55,980 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:55,981 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 43 treesize of output 122 [2019-01-18 18:10:55,982 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:10:56,034 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-18 18:10:56,034 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:67, output treesize:47 [2019-01-18 18:10:56,060 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:56,061 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:56,062 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:56,063 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:56,064 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:56,066 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:56,067 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:56,068 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:56,069 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:56,070 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:56,071 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:56,073 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:56,074 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:56,075 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:56,076 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:56,077 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:56,078 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:56,079 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 45 treesize of output 135 [2019-01-18 18:10:56,080 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:10:56,136 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. [2019-01-18 18:10:56,137 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:61, output treesize:45 [2019-01-18 18:10:56,160 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:10:56,160 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 18:10:56,202 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:10:56,220 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 18:10:56,221 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 14 [2019-01-18 18:10:56,221 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 18:10:56,221 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-01-18 18:10:56,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-01-18 18:10:56,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2019-01-18 18:10:56,221 INFO L87 Difference]: Start difference. First operand 329 states and 2135 transitions. Second operand 11 states. [2019-01-18 18:10:57,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:10:57,004 INFO L93 Difference]: Finished difference Result 407 states and 2353 transitions. [2019-01-18 18:10:57,005 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-01-18 18:10:57,005 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 6 [2019-01-18 18:10:57,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:10:57,010 INFO L225 Difference]: With dead ends: 407 [2019-01-18 18:10:57,010 INFO L226 Difference]: Without dead ends: 401 [2019-01-18 18:10:57,010 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=107, Invalid=199, Unknown=0, NotChecked=0, Total=306 [2019-01-18 18:10:57,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2019-01-18 18:10:57,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 341. [2019-01-18 18:10:57,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 341 states. [2019-01-18 18:10:57,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 2222 transitions. [2019-01-18 18:10:57,088 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 2222 transitions. Word has length 6 [2019-01-18 18:10:57,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:10:57,089 INFO L480 AbstractCegarLoop]: Abstraction has 341 states and 2222 transitions. [2019-01-18 18:10:57,089 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-01-18 18:10:57,089 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 2222 transitions. [2019-01-18 18:10:57,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-01-18 18:10:57,090 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:10:57,090 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-01-18 18:10:57,090 INFO L423 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:10:57,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:10:57,090 INFO L82 PathProgramCache]: Analyzing trace with hash 904329206, now seen corresponding path program 1 times [2019-01-18 18:10:57,091 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:10:57,091 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:10:57,091 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-18 18:10:57,091 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:10:57,092 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:10:57,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:10:57,391 WARN L181 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 16 [2019-01-18 18:10:57,655 WARN L181 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 16 [2019-01-18 18:10:57,707 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:10:57,707 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:10:57,707 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 18:10:57,707 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2019-01-18 18:10:57,708 INFO L207 CegarAbsIntRunner]: [0], [6], [10], [18], [24], [27] [2019-01-18 18:10:57,709 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-18 18:10:57,709 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 18:10:58,098 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 18:10:58,098 INFO L272 AbstractInterpreter]: Visited 6 different actions 11 times. Merged at 1 different actions 1 times. Never widened. Found 8 fixpoints after 5 different actions. Largest state had 0 variables. [2019-01-18 18:10:58,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:10:58,099 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 18:10:58,099 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:10:58,099 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 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 18:10:58,107 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:10:58,107 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 18:10:58,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:10:58,114 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 18:10:58,142 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 21 treesize of output 24 [2019-01-18 18:10:58,148 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 24 treesize of output 30 [2019-01-18 18:10:58,155 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:58,157 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:58,157 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 26 treesize of output 40 [2019-01-18 18:10:58,196 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:58,212 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:58,213 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:58,213 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 28 treesize of output 54 [2019-01-18 18:10:58,217 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:58,218 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:58,219 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:58,223 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:58,224 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 30 treesize of output 72 [2019-01-18 18:10:58,227 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:58,228 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:58,230 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:58,231 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:58,232 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:58,233 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 91 [2019-01-18 18:10:58,233 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-18 18:10:58,269 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:58,291 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:58,309 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:58,324 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:58,338 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:58,372 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:58,373 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 68 treesize of output 71 [2019-01-18 18:10:58,409 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:58,411 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:58,411 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 58 treesize of output 67 [2019-01-18 18:10:58,453 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:58,454 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:58,455 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:58,456 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:58,457 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 46 treesize of output 72 [2019-01-18 18:10:58,507 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:58,508 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:58,509 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:58,510 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:58,511 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:58,512 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:58,513 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 37 treesize of output 80 [2019-01-18 18:10:58,577 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:58,578 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:58,579 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:58,580 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:58,581 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:58,582 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:58,584 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:58,585 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:58,585 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 31 treesize of output 61 [2019-01-18 18:10:58,586 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2019-01-18 18:10:58,610 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:58,635 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:58,661 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:58,686 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:58,731 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-01-18 18:10:58,732 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 4 variables, input treesize:92, output treesize:91 [2019-01-18 18:10:58,767 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:58,768 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 41 treesize of output 91 [2019-01-18 18:10:58,768 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:10:58,810 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 18:10:58,810 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:101, output treesize:71 [2019-01-18 18:10:58,841 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:58,842 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:58,842 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:58,843 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:58,844 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:58,845 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:58,846 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:58,847 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:58,848 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 43 treesize of output 113 [2019-01-18 18:10:58,849 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:10:58,894 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 18:10:58,895 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:83, output treesize:57 [2019-01-18 18:10:58,922 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:58,923 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:58,924 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:58,925 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:58,926 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:58,927 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:58,929 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:58,930 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:58,931 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:58,932 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:58,933 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:58,934 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 18:10:58,935 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:58,936 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 43 treesize of output 122 [2019-01-18 18:10:58,937 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:10:58,987 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-18 18:10:58,987 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:67, output treesize:47 [2019-01-18 18:10:59,010 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:59,011 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:59,012 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:59,013 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:59,014 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:59,015 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:59,016 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:59,017 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:59,018 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:59,019 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:59,020 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:59,021 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:59,022 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:59,023 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 18:10:59,024 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:59,025 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 45 treesize of output 124 [2019-01-18 18:10:59,025 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:10:59,076 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. [2019-01-18 18:10:59,077 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:61, output treesize:49 [2019-01-18 18:10:59,099 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:10:59,100 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 18:10:59,147 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:10:59,167 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 18:10:59,167 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 14 [2019-01-18 18:10:59,167 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 18:10:59,167 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-01-18 18:10:59,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-01-18 18:10:59,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2019-01-18 18:10:59,168 INFO L87 Difference]: Start difference. First operand 341 states and 2222 transitions. Second operand 12 states. [2019-01-18 18:11:00,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:11:00,234 INFO L93 Difference]: Finished difference Result 645 states and 3901 transitions. [2019-01-18 18:11:00,234 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-01-18 18:11:00,235 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 6 [2019-01-18 18:11:00,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:11:00,242 INFO L225 Difference]: With dead ends: 645 [2019-01-18 18:11:00,242 INFO L226 Difference]: Without dead ends: 643 [2019-01-18 18:11:00,242 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=167, Invalid=295, Unknown=0, NotChecked=0, Total=462 [2019-01-18 18:11:00,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 643 states. [2019-01-18 18:11:00,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 643 to 463. [2019-01-18 18:11:00,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 463 states. [2019-01-18 18:11:00,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 463 states to 463 states and 3101 transitions. [2019-01-18 18:11:00,343 INFO L78 Accepts]: Start accepts. Automaton has 463 states and 3101 transitions. Word has length 6 [2019-01-18 18:11:00,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:11:00,344 INFO L480 AbstractCegarLoop]: Abstraction has 463 states and 3101 transitions. [2019-01-18 18:11:00,344 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-01-18 18:11:00,344 INFO L276 IsEmpty]: Start isEmpty. Operand 463 states and 3101 transitions. [2019-01-18 18:11:00,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-01-18 18:11:00,345 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:11:00,345 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-01-18 18:11:00,345 INFO L423 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:11:00,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:11:00,346 INFO L82 PathProgramCache]: Analyzing trace with hash 904333674, now seen corresponding path program 1 times [2019-01-18 18:11:00,346 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:11:00,346 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:11:00,347 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:11:00,347 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:11:00,347 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:11:00,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:11:00,432 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:11:00,432 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:11:00,432 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 18:11:00,432 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2019-01-18 18:11:00,432 INFO L207 CegarAbsIntRunner]: [0], [6], [18], [28], [30], [31] [2019-01-18 18:11:00,433 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-18 18:11:00,433 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 18:11:00,650 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 18:11:00,650 INFO L272 AbstractInterpreter]: Visited 6 different actions 9 times. Merged at 1 different actions 1 times. Never widened. Found 4 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-18 18:11:00,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:11:00,651 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 18:11:00,651 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:11:00,651 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 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 18:11:00,658 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:11:00,659 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 18:11:00,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:11:00,664 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 18:11:00,667 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 21 treesize of output 24 [2019-01-18 18:11:00,674 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 24 treesize of output 26 [2019-01-18 18:11:00,680 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:00,682 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:00,683 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 26 treesize of output 36 [2019-01-18 18:11:00,689 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:00,692 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:00,695 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:00,695 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 28 treesize of output 50 [2019-01-18 18:11:00,701 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:00,706 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:00,709 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:00,712 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:00,712 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 68 [2019-01-18 18:11:00,731 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 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 32 treesize of output 67 [2019-01-18 18:11:00,732 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-18 18:11:00,767 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:00,794 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:00,811 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:00,825 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:00,838 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:00,861 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 43 treesize of output 39 [2019-01-18 18:11:00,875 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:00,877 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:00,877 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 36 treesize of output 49 [2019-01-18 18:11:00,910 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:00,911 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:00,914 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:00,915 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:00,915 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 32 treesize of output 57 [2019-01-18 18:11:00,955 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:00,956 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:00,957 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:00,958 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:00,959 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:00,961 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:00,962 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 37 [2019-01-18 18:11:00,962 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-01-18 18:11:00,977 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:00,991 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:01,008 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:01,041 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 18:11:01,042 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 5 variables, input treesize:64, output treesize:67 [2019-01-18 18:11:01,138 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:01,139 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 62 [2019-01-18 18:11:01,140 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:11:01,165 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 18:11:01,165 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:72, output treesize:46 [2019-01-18 18:11:01,186 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:01,187 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:01,187 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:01,189 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:01,192 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:01,193 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:01,194 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:01,203 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 0 new quantified variables, introduced 2 case distinctions, treesize of input 38 treesize of output 88 [2019-01-18 18:11:01,204 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-01-18 18:11:01,302 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 7 dim-0 vars, and 2 xjuncts. [2019-01-18 18:11:01,302 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:58, output treesize:68 [2019-01-18 18:11:01,354 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:11:01,354 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 18:11:01,369 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:11:01,388 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 18:11:01,389 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 9 [2019-01-18 18:11:01,389 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 18:11:01,389 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-01-18 18:11:01,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-01-18 18:11:01,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2019-01-18 18:11:01,389 INFO L87 Difference]: Start difference. First operand 463 states and 3101 transitions. Second operand 9 states. [2019-01-18 18:11:01,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:11:01,957 INFO L93 Difference]: Finished difference Result 527 states and 3325 transitions. [2019-01-18 18:11:01,957 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-01-18 18:11:01,957 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 6 [2019-01-18 18:11:01,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:11:01,964 INFO L225 Difference]: With dead ends: 527 [2019-01-18 18:11:01,964 INFO L226 Difference]: Without dead ends: 524 [2019-01-18 18:11:01,964 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=78, Invalid=132, Unknown=0, NotChecked=0, Total=210 [2019-01-18 18:11:01,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2019-01-18 18:11:02,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 487. [2019-01-18 18:11:02,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 487 states. [2019-01-18 18:11:02,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 487 states to 487 states and 3268 transitions. [2019-01-18 18:11:02,084 INFO L78 Accepts]: Start accepts. Automaton has 487 states and 3268 transitions. Word has length 6 [2019-01-18 18:11:02,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:11:02,085 INFO L480 AbstractCegarLoop]: Abstraction has 487 states and 3268 transitions. [2019-01-18 18:11:02,085 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-01-18 18:11:02,085 INFO L276 IsEmpty]: Start isEmpty. Operand 487 states and 3268 transitions. [2019-01-18 18:11:02,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-01-18 18:11:02,086 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:11:02,086 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-01-18 18:11:02,086 INFO L423 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:11:02,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:11:02,086 INFO L82 PathProgramCache]: Analyzing trace with hash 904320156, now seen corresponding path program 1 times [2019-01-18 18:11:02,086 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:11:02,086 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:11:02,087 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:11:02,087 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:11:02,087 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:11:02,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:11:02,158 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-01-18 18:11:02,159 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:11:02,159 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 18:11:02,159 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2019-01-18 18:11:02,159 INFO L207 CegarAbsIntRunner]: [0], [6], [14], [18], [28], [29] [2019-01-18 18:11:02,160 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-18 18:11:02,160 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 18:11:02,432 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 18:11:02,433 INFO L272 AbstractInterpreter]: Visited 6 different actions 10 times. Merged at 1 different actions 1 times. Never widened. Found 6 fixpoints after 4 different actions. Largest state had 0 variables. [2019-01-18 18:11:02,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:11:02,433 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 18:11:02,433 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:11:02,433 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 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 18:11:02,441 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:11:02,442 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 18:11:02,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:11:02,446 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 18:11:02,472 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 21 treesize of output 24 [2019-01-18 18:11:02,474 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 24 treesize of output 30 [2019-01-18 18:11:02,479 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:02,481 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:02,481 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 26 treesize of output 40 [2019-01-18 18:11:02,484 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:02,486 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:02,488 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:02,488 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 28 treesize of output 54 [2019-01-18 18:11:02,499 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:02,501 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:02,504 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:02,506 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:02,506 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 30 treesize of output 72 [2019-01-18 18:11:02,520 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 71 [2019-01-18 18:11:02,520 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-18 18:11:02,549 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:02,572 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:02,590 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:02,605 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:02,618 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:02,647 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:02,648 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 48 treesize of output 54 [2019-01-18 18:11:02,678 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:02,679 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:02,680 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 41 treesize of output 53 [2019-01-18 18:11:02,715 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:02,717 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:02,718 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:02,719 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:02,720 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 32 treesize of output 61 [2019-01-18 18:11:02,762 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:02,763 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:02,764 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:02,766 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:02,767 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:02,768 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:02,768 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 41 [2019-01-18 18:11:02,769 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-01-18 18:11:02,785 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:02,801 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:02,815 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:02,848 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-01-18 18:11:02,849 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 4 variables, input treesize:72, output treesize:71 [2019-01-18 18:11:02,899 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:02,899 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 66 [2019-01-18 18:11:02,900 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:11:02,927 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-01-18 18:11:02,928 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:76, output treesize:50 [2019-01-18 18:11:02,952 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:02,953 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:02,954 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:02,955 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:02,956 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:02,957 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:02,958 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:02,959 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 88 [2019-01-18 18:11:02,959 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:11:02,991 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 18:11:02,992 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:62, output treesize:40 [2019-01-18 18:11:03,017 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:03,017 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:03,018 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:03,019 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:03,020 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:03,022 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:03,023 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:03,024 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:03,025 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:03,026 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:03,027 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:03,028 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:03,028 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 18:11:03,029 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 104 [2019-01-18 18:11:03,030 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:11:03,065 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-18 18:11:03,065 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:50, output treesize:36 [2019-01-18 18:11:03,087 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:11:03,087 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 18:11:03,126 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:11:03,146 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 18:11:03,146 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2019-01-18 18:11:03,147 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 18:11:03,147 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-01-18 18:11:03,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-01-18 18:11:03,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2019-01-18 18:11:03,147 INFO L87 Difference]: Start difference. First operand 487 states and 3268 transitions. Second operand 10 states. [2019-01-18 18:11:03,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:11:03,821 INFO L93 Difference]: Finished difference Result 534 states and 3436 transitions. [2019-01-18 18:11:03,821 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-01-18 18:11:03,821 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 6 [2019-01-18 18:11:03,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:11:03,829 INFO L225 Difference]: With dead ends: 534 [2019-01-18 18:11:03,829 INFO L226 Difference]: Without dead ends: 533 [2019-01-18 18:11:03,830 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=98, Invalid=174, Unknown=0, NotChecked=0, Total=272 [2019-01-18 18:11:03,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2019-01-18 18:11:03,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 505. [2019-01-18 18:11:03,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 505 states. [2019-01-18 18:11:03,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 3394 transitions. [2019-01-18 18:11:03,954 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 3394 transitions. Word has length 6 [2019-01-18 18:11:03,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:11:03,954 INFO L480 AbstractCegarLoop]: Abstraction has 505 states and 3394 transitions. [2019-01-18 18:11:03,954 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-01-18 18:11:03,954 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 3394 transitions. [2019-01-18 18:11:03,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-01-18 18:11:03,955 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:11:03,955 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-01-18 18:11:03,956 INFO L423 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:11:03,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:11:03,956 INFO L82 PathProgramCache]: Analyzing trace with hash 904806422, now seen corresponding path program 1 times [2019-01-18 18:11:03,956 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:11:03,957 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:11:03,957 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:11:03,957 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:11:03,957 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:11:03,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:11:04,013 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:11:04,013 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:11:04,013 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 18:11:04,013 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2019-01-18 18:11:04,014 INFO L207 CegarAbsIntRunner]: [0], [18], [22], [24], [28], [29] [2019-01-18 18:11:04,015 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-18 18:11:04,015 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 18:11:04,330 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 18:11:04,330 INFO L272 AbstractInterpreter]: Visited 6 different actions 10 times. Merged at 1 different actions 1 times. Never widened. Found 6 fixpoints after 4 different actions. Largest state had 0 variables. [2019-01-18 18:11:04,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:11:04,331 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 18:11:04,331 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:11:04,331 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 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 18:11:04,339 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:11:04,339 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 18:11:04,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:11:04,347 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 18:11:04,350 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 21 treesize of output 24 [2019-01-18 18:11:04,358 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 24 treesize of output 26 [2019-01-18 18:11:04,373 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:04,375 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:04,376 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 26 treesize of output 36 [2019-01-18 18:11:04,388 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:04,390 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:04,393 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:04,393 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 28 treesize of output 50 [2019-01-18 18:11:04,403 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:04,407 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:04,409 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:04,411 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:04,411 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 68 [2019-01-18 18:11:04,415 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:04,417 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:04,422 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:04,425 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:04,426 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:04,426 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 14 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 87 [2019-01-18 18:11:04,427 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-18 18:11:04,465 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:04,485 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:04,502 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:04,515 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:04,529 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:04,555 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 63 treesize of output 56 [2019-01-18 18:11:04,571 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:04,573 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:04,574 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 53 treesize of output 63 [2019-01-18 18:11:04,612 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:04,613 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:04,615 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:04,617 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:04,617 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 46 treesize of output 68 [2019-01-18 18:11:04,664 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:04,665 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:04,666 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:04,667 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:04,668 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:04,671 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:04,671 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 76 [2019-01-18 18:11:04,730 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:04,731 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:04,733 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:04,734 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:04,735 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:04,736 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:04,737 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:04,739 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:04,740 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2019-01-18 18:11:04,740 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2019-01-18 18:11:04,763 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:04,785 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:04,809 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:04,835 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:04,878 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-01-18 18:11:04,878 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 4 variables, input treesize:84, output treesize:87 [2019-01-18 18:11:04,910 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:04,911 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 87 [2019-01-18 18:11:04,911 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:11:04,947 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 18:11:04,948 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:97, output treesize:67 [2019-01-18 18:11:04,976 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:04,977 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:04,978 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:04,979 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:04,980 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:04,982 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:04,983 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:04,984 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:04,985 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 43 treesize of output 101 [2019-01-18 18:11:04,985 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:11:05,029 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-18 18:11:05,029 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:79, output treesize:53 [2019-01-18 18:11:05,054 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:05,055 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:05,056 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:05,057 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:05,058 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:05,059 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:05,060 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:05,061 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:05,064 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:05,065 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:05,065 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:05,066 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 18:11:05,066 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:05,067 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 43 treesize of output 114 [2019-01-18 18:11:05,068 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:11:05,115 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. [2019-01-18 18:11:05,115 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:63, output treesize:43 [2019-01-18 18:11:05,138 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:11:05,138 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 18:11:05,180 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:11:05,198 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 18:11:05,198 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2019-01-18 18:11:05,199 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 18:11:05,199 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-01-18 18:11:05,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-01-18 18:11:05,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2019-01-18 18:11:05,199 INFO L87 Difference]: Start difference. First operand 505 states and 3394 transitions. Second operand 10 states. [2019-01-18 18:11:05,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:11:05,856 INFO L93 Difference]: Finished difference Result 543 states and 3439 transitions. [2019-01-18 18:11:05,857 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-01-18 18:11:05,857 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 6 [2019-01-18 18:11:05,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:11:05,863 INFO L225 Difference]: With dead ends: 543 [2019-01-18 18:11:05,863 INFO L226 Difference]: Without dead ends: 542 [2019-01-18 18:11:05,864 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=101, Invalid=171, Unknown=0, NotChecked=0, Total=272 [2019-01-18 18:11:05,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2019-01-18 18:11:05,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 500. [2019-01-18 18:11:05,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 500 states. [2019-01-18 18:11:05,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 500 states to 500 states and 3359 transitions. [2019-01-18 18:11:05,987 INFO L78 Accepts]: Start accepts. Automaton has 500 states and 3359 transitions. Word has length 6 [2019-01-18 18:11:05,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:11:05,988 INFO L480 AbstractCegarLoop]: Abstraction has 500 states and 3359 transitions. [2019-01-18 18:11:05,988 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-01-18 18:11:05,988 INFO L276 IsEmpty]: Start isEmpty. Operand 500 states and 3359 transitions. [2019-01-18 18:11:05,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-01-18 18:11:05,989 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:11:05,989 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-01-18 18:11:05,990 INFO L423 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:11:05,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:11:05,990 INFO L82 PathProgramCache]: Analyzing trace with hash 904796812, now seen corresponding path program 1 times [2019-01-18 18:11:05,990 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:11:05,990 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:11:05,991 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:11:05,991 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:11:05,991 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:11:05,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:11:06,102 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:11:06,102 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:11:06,102 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 18:11:06,102 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2019-01-18 18:11:06,103 INFO L207 CegarAbsIntRunner]: [0], [14], [18], [22], [28], [29] [2019-01-18 18:11:06,103 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-18 18:11:06,103 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 18:11:06,376 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 18:11:06,376 INFO L272 AbstractInterpreter]: Visited 6 different actions 10 times. Merged at 1 different actions 1 times. Never widened. Found 6 fixpoints after 4 different actions. Largest state had 0 variables. [2019-01-18 18:11:06,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:11:06,377 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 18:11:06,377 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:11:06,377 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 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 18:11:06,386 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:11:06,386 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 18:11:06,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:11:06,391 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 18:11:06,398 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 21 treesize of output 24 [2019-01-18 18:11:06,409 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 24 treesize of output 26 [2019-01-18 18:11:06,420 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:06,422 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:06,422 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 26 treesize of output 36 [2019-01-18 18:11:06,434 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:06,437 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:06,439 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:06,439 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 28 treesize of output 50 [2019-01-18 18:11:06,442 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:06,448 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:06,450 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:06,452 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:06,453 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 68 [2019-01-18 18:11:06,459 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:06,461 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:06,465 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:06,468 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:06,469 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:06,469 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 14 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 87 [2019-01-18 18:11:06,470 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-18 18:11:06,509 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:06,529 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:06,546 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:06,558 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:06,571 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:06,599 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 63 treesize of output 56 [2019-01-18 18:11:06,614 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:06,617 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:06,617 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 53 treesize of output 63 [2019-01-18 18:11:06,678 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:06,679 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:06,681 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:06,682 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:06,683 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 46 treesize of output 68 [2019-01-18 18:11:06,727 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:06,728 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:06,730 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:06,731 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:06,732 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:06,734 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:06,735 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 76 [2019-01-18 18:11:06,794 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:06,795 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:06,797 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:06,798 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:06,800 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:06,801 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:06,802 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:06,803 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:06,804 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2019-01-18 18:11:06,804 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2019-01-18 18:11:06,828 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:06,850 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:06,874 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:06,900 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:06,942 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-01-18 18:11:06,943 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 4 variables, input treesize:84, output treesize:87 [2019-01-18 18:11:06,977 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:06,978 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 87 [2019-01-18 18:11:06,979 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:11:07,019 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 18:11:07,020 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:97, output treesize:67 [2019-01-18 18:11:07,050 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:07,051 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:07,052 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:07,053 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:07,054 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:07,056 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:07,057 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:07,058 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:07,059 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 43 treesize of output 101 [2019-01-18 18:11:07,060 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:11:07,103 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-18 18:11:07,103 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:79, output treesize:53 [2019-01-18 18:11:07,126 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:07,127 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:07,129 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:07,130 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:07,131 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:07,132 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:07,134 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:07,135 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:07,136 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:07,138 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:07,140 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:07,141 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:07,142 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:07,142 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 18:11:07,143 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 43 treesize of output 119 [2019-01-18 18:11:07,144 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:11:07,191 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. [2019-01-18 18:11:07,192 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:63, output treesize:45 [2019-01-18 18:11:07,215 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:11:07,215 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 18:11:07,253 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:11:07,272 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 18:11:07,273 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2019-01-18 18:11:07,273 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 18:11:07,273 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-01-18 18:11:07,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-01-18 18:11:07,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2019-01-18 18:11:07,274 INFO L87 Difference]: Start difference. First operand 500 states and 3359 transitions. Second operand 10 states. [2019-01-18 18:11:07,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:11:07,938 INFO L93 Difference]: Finished difference Result 537 states and 3427 transitions. [2019-01-18 18:11:07,939 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-01-18 18:11:07,939 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 6 [2019-01-18 18:11:07,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:11:07,944 INFO L225 Difference]: With dead ends: 537 [2019-01-18 18:11:07,944 INFO L226 Difference]: Without dead ends: 536 [2019-01-18 18:11:07,944 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=100, Invalid=172, Unknown=0, NotChecked=0, Total=272 [2019-01-18 18:11:07,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2019-01-18 18:11:08,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 501. [2019-01-18 18:11:08,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 501 states. [2019-01-18 18:11:08,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 501 states to 501 states and 3366 transitions. [2019-01-18 18:11:08,068 INFO L78 Accepts]: Start accepts. Automaton has 501 states and 3366 transitions. Word has length 6 [2019-01-18 18:11:08,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:11:08,068 INFO L480 AbstractCegarLoop]: Abstraction has 501 states and 3366 transitions. [2019-01-18 18:11:08,068 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-01-18 18:11:08,068 INFO L276 IsEmpty]: Start isEmpty. Operand 501 states and 3366 transitions. [2019-01-18 18:11:08,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-01-18 18:11:08,069 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:11:08,069 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-01-18 18:11:08,069 INFO L423 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:11:08,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:11:08,069 INFO L82 PathProgramCache]: Analyzing trace with hash 904848706, now seen corresponding path program 1 times [2019-01-18 18:11:08,069 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:11:08,070 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:11:08,070 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:11:08,070 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:11:08,070 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:11:08,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:11:08,239 WARN L181 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 20 [2019-01-18 18:11:08,280 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-01-18 18:11:08,281 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:11:08,281 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 18:11:08,281 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2019-01-18 18:11:08,282 INFO L207 CegarAbsIntRunner]: [0], [6], [18], [24], [28], [29] [2019-01-18 18:11:08,283 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-18 18:11:08,283 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 18:11:08,571 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 18:11:08,572 INFO L272 AbstractInterpreter]: Visited 6 different actions 10 times. Merged at 1 different actions 1 times. Never widened. Found 6 fixpoints after 4 different actions. Largest state had 0 variables. [2019-01-18 18:11:08,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:11:08,572 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 18:11:08,572 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:11:08,572 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 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 18:11:08,582 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:11:08,582 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 18:11:08,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:11:08,590 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 18:11:08,618 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 21 treesize of output 24 [2019-01-18 18:11:08,624 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 24 treesize of output 30 [2019-01-18 18:11:08,631 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:08,634 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:08,634 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 26 treesize of output 40 [2019-01-18 18:11:08,637 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:08,639 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:08,641 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:08,641 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 28 treesize of output 54 [2019-01-18 18:11:08,648 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:08,651 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:08,653 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:08,656 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:08,656 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 30 treesize of output 72 [2019-01-18 18:11:08,665 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:08,690 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:08,713 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:08,737 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:08,743 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:08,743 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 91 [2019-01-18 18:11:08,744 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-18 18:11:08,797 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:08,820 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:08,838 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:08,853 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:08,866 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:08,898 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:08,899 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 68 treesize of output 71 [2019-01-18 18:11:08,938 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:08,940 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:08,940 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 58 treesize of output 67 [2019-01-18 18:11:08,982 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:08,983 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:08,985 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:08,986 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:08,986 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 46 treesize of output 72 [2019-01-18 18:11:09,037 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:09,039 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:09,040 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:09,041 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:09,042 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:09,043 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:09,044 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 37 treesize of output 80 [2019-01-18 18:11:09,177 WARN L181 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 36 [2019-01-18 18:11:09,181 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:09,183 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:09,184 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:09,185 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:09,186 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:09,187 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:09,188 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:09,189 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:09,190 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 31 treesize of output 61 [2019-01-18 18:11:09,191 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2019-01-18 18:11:09,217 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:09,242 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:09,268 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:09,294 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:09,340 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-01-18 18:11:09,340 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 4 variables, input treesize:92, output treesize:91 [2019-01-18 18:11:09,374 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:09,375 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 41 treesize of output 91 [2019-01-18 18:11:09,375 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:11:09,418 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 18:11:09,418 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:101, output treesize:71 [2019-01-18 18:11:09,445 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:09,446 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:09,447 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:09,448 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:09,449 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:09,450 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:09,451 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 18:11:09,452 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 43 treesize of output 106 [2019-01-18 18:11:09,452 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:11:09,500 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-18 18:11:09,500 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:83, output treesize:59 [2019-01-18 18:11:09,525 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:09,526 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:09,527 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:09,529 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:09,530 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:09,531 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:09,532 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:09,533 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:09,534 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:09,535 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:09,536 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:09,537 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 45 treesize of output 115 [2019-01-18 18:11:09,538 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:11:09,588 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. [2019-01-18 18:11:09,588 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:73, output treesize:51 [2019-01-18 18:11:09,612 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:11:09,612 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 18:11:09,649 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:11:09,668 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 18:11:09,668 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2019-01-18 18:11:09,668 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 18:11:09,669 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-01-18 18:11:09,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-01-18 18:11:09,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2019-01-18 18:11:09,669 INFO L87 Difference]: Start difference. First operand 501 states and 3366 transitions. Second operand 10 states. [2019-01-18 18:11:10,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:11:10,427 INFO L93 Difference]: Finished difference Result 588 states and 3737 transitions. [2019-01-18 18:11:10,428 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-01-18 18:11:10,428 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 6 [2019-01-18 18:11:10,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:11:10,432 INFO L225 Difference]: With dead ends: 588 [2019-01-18 18:11:10,432 INFO L226 Difference]: Without dead ends: 587 [2019-01-18 18:11:10,433 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=104, Invalid=168, Unknown=0, NotChecked=0, Total=272 [2019-01-18 18:11:10,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 587 states. [2019-01-18 18:11:10,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 587 to 534. [2019-01-18 18:11:10,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 534 states. [2019-01-18 18:11:10,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 534 states to 534 states and 3605 transitions. [2019-01-18 18:11:10,571 INFO L78 Accepts]: Start accepts. Automaton has 534 states and 3605 transitions. Word has length 6 [2019-01-18 18:11:10,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:11:10,571 INFO L480 AbstractCegarLoop]: Abstraction has 534 states and 3605 transitions. [2019-01-18 18:11:10,571 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-01-18 18:11:10,571 INFO L276 IsEmpty]: Start isEmpty. Operand 534 states and 3605 transitions. [2019-01-18 18:11:10,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-01-18 18:11:10,572 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:11:10,572 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-01-18 18:11:10,573 INFO L423 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:11:10,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:11:10,573 INFO L82 PathProgramCache]: Analyzing trace with hash 904869912, now seen corresponding path program 1 times [2019-01-18 18:11:10,573 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:11:10,574 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:11:10,574 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:11:10,574 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:11:10,574 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:11:10,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:11:10,621 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:11:10,621 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:11:10,622 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 18:11:10,622 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2019-01-18 18:11:10,622 INFO L207 CegarAbsIntRunner]: [0], [18], [24], [28], [30], [31] [2019-01-18 18:11:10,622 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-18 18:11:10,623 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 18:11:10,913 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 18:11:10,913 INFO L272 AbstractInterpreter]: Visited 6 different actions 9 times. Merged at 1 different actions 1 times. Never widened. Found 4 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-18 18:11:10,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:11:10,914 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 18:11:10,914 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:11:10,914 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 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 18:11:10,932 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:11:10,932 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 18:11:10,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:11:10,941 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 18:11:10,959 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 21 treesize of output 24 [2019-01-18 18:11:11,003 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 24 treesize of output 26 [2019-01-18 18:11:11,070 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:11,092 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:11,093 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 26 treesize of output 36 [2019-01-18 18:11:11,158 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:11,181 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:11,202 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:11,202 INFO L303 Elim1Store]: Index analysis took 109 ms [2019-01-18 18:11:11,203 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 28 treesize of output 50 [2019-01-18 18:11:11,242 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:11,289 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:11,310 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:11,328 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:11,328 INFO L303 Elim1Store]: Index analysis took 123 ms [2019-01-18 18:11:11,329 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 68 [2019-01-18 18:11:11,363 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:11,388 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:11,434 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:11,458 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:11,482 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:11,482 INFO L303 Elim1Store]: Index analysis took 151 ms [2019-01-18 18:11:11,483 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 14 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 87 [2019-01-18 18:11:11,484 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-18 18:11:11,960 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:11,998 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:12,015 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:12,029 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:12,043 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:12,071 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 63 treesize of output 56 [2019-01-18 18:11:12,088 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:12,091 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:12,092 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 53 treesize of output 63 [2019-01-18 18:11:12,128 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:12,130 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:12,132 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:12,133 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:12,134 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 46 treesize of output 68 [2019-01-18 18:11:12,181 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:12,183 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:12,184 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:12,185 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:12,186 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:12,188 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:12,189 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 76 [2019-01-18 18:11:12,247 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:12,248 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:12,250 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:12,251 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:12,252 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:12,253 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:12,254 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:12,256 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:12,257 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2019-01-18 18:11:12,258 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2019-01-18 18:11:12,283 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:12,305 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:12,328 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:12,354 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:12,397 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 18:11:12,398 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 5 variables, input treesize:84, output treesize:87 [2019-01-18 18:11:12,423 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:12,424 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 87 [2019-01-18 18:11:12,425 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:11:12,466 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-18 18:11:12,467 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:97, output treesize:67 [2019-01-18 18:11:12,491 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:12,492 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:12,492 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:12,493 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:12,494 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:12,497 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:12,497 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 18:11:12,498 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 102 [2019-01-18 18:11:12,498 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:11:12,542 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. [2019-01-18 18:11:12,543 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:79, output treesize:55 [2019-01-18 18:11:12,563 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:11:12,563 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 18:11:12,584 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:11:12,602 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 18:11:12,602 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-18 18:11:12,603 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 18:11:12,603 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-18 18:11:12,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-18 18:11:12,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2019-01-18 18:11:12,603 INFO L87 Difference]: Start difference. First operand 534 states and 3605 transitions. Second operand 8 states. [2019-01-18 18:11:13,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:11:13,095 INFO L93 Difference]: Finished difference Result 558 states and 3635 transitions. [2019-01-18 18:11:13,096 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-18 18:11:13,096 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 6 [2019-01-18 18:11:13,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:11:13,099 INFO L225 Difference]: With dead ends: 558 [2019-01-18 18:11:13,099 INFO L226 Difference]: Without dead ends: 557 [2019-01-18 18:11:13,100 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2019-01-18 18:11:13,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 557 states. [2019-01-18 18:11:13,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 557 to 533. [2019-01-18 18:11:13,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 533 states. [2019-01-18 18:11:13,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 533 states to 533 states and 3598 transitions. [2019-01-18 18:11:13,222 INFO L78 Accepts]: Start accepts. Automaton has 533 states and 3598 transitions. Word has length 6 [2019-01-18 18:11:13,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:11:13,222 INFO L480 AbstractCegarLoop]: Abstraction has 533 states and 3598 transitions. [2019-01-18 18:11:13,222 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-18 18:11:13,222 INFO L276 IsEmpty]: Start isEmpty. Operand 533 states and 3598 transitions. [2019-01-18 18:11:13,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-01-18 18:11:13,224 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:11:13,224 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-01-18 18:11:13,224 INFO L423 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:11:13,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:11:13,225 INFO L82 PathProgramCache]: Analyzing trace with hash 904431632, now seen corresponding path program 1 times [2019-01-18 18:11:13,225 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:11:13,225 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:11:13,225 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:11:13,225 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:11:13,225 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:11:13,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:11:13,307 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:11:13,308 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:11:13,308 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 18:11:13,308 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2019-01-18 18:11:13,308 INFO L207 CegarAbsIntRunner]: [0], [6], [10], [18], [28], [29] [2019-01-18 18:11:13,309 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-18 18:11:13,309 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 18:11:13,605 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 18:11:13,605 INFO L272 AbstractInterpreter]: Visited 6 different actions 10 times. Merged at 1 different actions 1 times. Never widened. Found 6 fixpoints after 4 different actions. Largest state had 0 variables. [2019-01-18 18:11:13,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:11:13,606 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 18:11:13,606 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:11:13,606 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 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 18:11:13,614 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:11:13,614 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 18:11:13,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:11:13,621 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 18:11:13,651 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:13,652 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 48 treesize of output 54 [2019-01-18 18:11:13,701 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:13,702 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:13,703 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 41 treesize of output 53 [2019-01-18 18:11:13,737 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:13,738 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:13,738 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:13,739 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:13,740 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 32 treesize of output 61 [2019-01-18 18:11:13,783 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:13,784 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:13,785 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:13,786 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:13,787 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:13,788 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:13,789 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 41 [2019-01-18 18:11:13,789 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2019-01-18 18:11:13,806 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:13,822 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:13,837 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:13,861 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-01-18 18:11:13,864 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2019-01-18 18:11:13,866 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2019-01-18 18:11:13,870 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2019-01-18 18:11:13,873 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 30 treesize of output 72 [2019-01-18 18:11:13,881 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 71 [2019-01-18 18:11:13,882 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-01-18 18:11:13,908 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:13,928 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:13,944 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:13,957 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:13,968 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:14,001 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 18:11:14,001 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 5 variables, input treesize:72, output treesize:71 [2019-01-18 18:11:14,041 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:14,041 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 66 [2019-01-18 18:11:14,042 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:11:14,070 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 18:11:14,071 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:76, output treesize:50 [2019-01-18 18:11:14,094 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:14,095 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:14,096 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:14,096 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:14,097 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:14,098 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 18:11:14,098 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 81 [2019-01-18 18:11:14,099 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:11:14,131 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 18:11:14,131 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:62, output treesize:42 [2019-01-18 18:11:14,154 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:14,155 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:14,156 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:14,157 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:14,158 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:14,159 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:14,160 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:14,161 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:14,162 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:14,163 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 90 [2019-01-18 18:11:14,163 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:11:14,196 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-18 18:11:14,196 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:56, output treesize:38 [2019-01-18 18:11:14,215 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:11:14,215 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 18:11:14,237 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:11:14,257 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 18:11:14,257 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2019-01-18 18:11:14,257 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 18:11:14,257 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-01-18 18:11:14,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-01-18 18:11:14,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=91, Unknown=0, NotChecked=0, Total=156 [2019-01-18 18:11:14,258 INFO L87 Difference]: Start difference. First operand 533 states and 3598 transitions. Second operand 10 states. [2019-01-18 18:11:14,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:11:14,956 INFO L93 Difference]: Finished difference Result 795 states and 5176 transitions. [2019-01-18 18:11:14,956 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-01-18 18:11:14,956 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 6 [2019-01-18 18:11:14,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:11:14,960 INFO L225 Difference]: With dead ends: 795 [2019-01-18 18:11:14,960 INFO L226 Difference]: Without dead ends: 794 [2019-01-18 18:11:14,961 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=108, Unknown=0, NotChecked=0, Total=182 [2019-01-18 18:11:14,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 794 states. [2019-01-18 18:11:15,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 794 to 484. [2019-01-18 18:11:15,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 484 states. [2019-01-18 18:11:15,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 3230 transitions. [2019-01-18 18:11:15,112 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 3230 transitions. Word has length 6 [2019-01-18 18:11:15,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:11:15,112 INFO L480 AbstractCegarLoop]: Abstraction has 484 states and 3230 transitions. [2019-01-18 18:11:15,112 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-01-18 18:11:15,112 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 3230 transitions. [2019-01-18 18:11:15,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-01-18 18:11:15,114 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:11:15,114 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-01-18 18:11:15,114 INFO L423 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:11:15,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:11:15,114 INFO L82 PathProgramCache]: Analyzing trace with hash 904452838, now seen corresponding path program 1 times [2019-01-18 18:11:15,114 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:11:15,114 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:11:15,115 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:11:15,115 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:11:15,115 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:11:15,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:11:15,252 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:11:15,252 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:11:15,252 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 18:11:15,252 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2019-01-18 18:11:15,253 INFO L207 CegarAbsIntRunner]: [0], [10], [18], [28], [30], [31] [2019-01-18 18:11:15,254 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-18 18:11:15,254 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 18:11:15,462 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 18:11:15,462 INFO L272 AbstractInterpreter]: Visited 6 different actions 9 times. Merged at 1 different actions 1 times. Never widened. Found 4 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-18 18:11:15,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:11:15,462 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 18:11:15,463 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:11:15,463 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 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 18:11:15,471 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:11:15,472 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 18:11:15,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:11:15,478 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 18:11:15,481 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 21 treesize of output 24 [2019-01-18 18:11:15,488 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 24 treesize of output 26 [2019-01-18 18:11:15,494 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:15,495 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:15,496 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 26 treesize of output 36 [2019-01-18 18:11:15,503 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:15,505 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:15,508 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:15,508 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 28 treesize of output 50 [2019-01-18 18:11:15,513 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:15,517 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:15,519 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:15,521 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:15,522 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 68 [2019-01-18 18:11:15,538 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 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 32 treesize of output 67 [2019-01-18 18:11:15,538 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-18 18:11:15,575 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:15,596 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:15,612 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:15,625 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:15,638 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:15,662 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 43 treesize of output 39 [2019-01-18 18:11:15,676 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:15,679 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:15,679 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 36 treesize of output 49 [2019-01-18 18:11:15,711 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:15,712 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:15,714 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:15,715 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:15,716 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 32 treesize of output 57 [2019-01-18 18:11:15,756 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:15,757 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:15,758 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:15,759 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:15,760 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:15,762 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:15,763 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 37 [2019-01-18 18:11:15,763 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-01-18 18:11:15,777 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:15,791 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:15,808 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:15,838 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 18:11:15,838 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 5 variables, input treesize:64, output treesize:67 [2019-01-18 18:11:15,881 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:15,882 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 62 [2019-01-18 18:11:15,883 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:11:15,907 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 18:11:15,908 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:72, output treesize:46 [2019-01-18 18:11:15,931 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:15,932 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:15,933 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:15,933 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:15,937 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:15,937 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 18:11:15,946 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 38 treesize of output 81 [2019-01-18 18:11:15,947 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-01-18 18:11:16,043 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 7 dim-0 vars, and 2 xjuncts. [2019-01-18 18:11:16,043 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:58, output treesize:76 [2019-01-18 18:11:18,083 WARN L181 SmtUtils]: Spent 2.02 s on a formula simplification. DAG size of input: 56 DAG size of output: 28 [2019-01-18 18:11:18,086 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:11:18,087 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 18:11:18,110 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:11:18,128 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 18:11:18,128 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 9 [2019-01-18 18:11:18,128 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 18:11:18,128 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-01-18 18:11:18,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-01-18 18:11:18,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2019-01-18 18:11:18,129 INFO L87 Difference]: Start difference. First operand 484 states and 3230 transitions. Second operand 9 states. [2019-01-18 18:11:18,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:11:18,829 INFO L93 Difference]: Finished difference Result 539 states and 3425 transitions. [2019-01-18 18:11:18,830 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-01-18 18:11:18,830 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 6 [2019-01-18 18:11:18,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:11:18,833 INFO L225 Difference]: With dead ends: 539 [2019-01-18 18:11:18,833 INFO L226 Difference]: Without dead ends: 538 [2019-01-18 18:11:18,834 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2019-01-18 18:11:18,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2019-01-18 18:11:19,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 500. [2019-01-18 18:11:19,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 500 states. [2019-01-18 18:11:19,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 500 states to 500 states and 3342 transitions. [2019-01-18 18:11:19,075 INFO L78 Accepts]: Start accepts. Automaton has 500 states and 3342 transitions. Word has length 6 [2019-01-18 18:11:19,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:11:19,075 INFO L480 AbstractCegarLoop]: Abstraction has 500 states and 3342 transitions. [2019-01-18 18:11:19,075 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-01-18 18:11:19,076 INFO L276 IsEmpty]: Start isEmpty. Operand 500 states and 3342 transitions. [2019-01-18 18:11:19,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-01-18 18:11:19,077 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:11:19,077 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2019-01-18 18:11:19,077 INFO L423 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:11:19,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:11:19,078 INFO L82 PathProgramCache]: Analyzing trace with hash 893599114, now seen corresponding path program 4 times [2019-01-18 18:11:19,078 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:11:19,078 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:11:19,078 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:11:19,078 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:11:19,078 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:11:19,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:11:19,173 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-01-18 18:11:19,174 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:11:19,174 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 18:11:19,174 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-18 18:11:19,174 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-18 18:11:19,174 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:11:19,174 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 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 18:11:19,184 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:11:19,184 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 18:11:19,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:11:19,189 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 18:11:19,211 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 21 treesize of output 24 [2019-01-18 18:11:19,213 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 24 treesize of output 30 [2019-01-18 18:11:19,217 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:19,218 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:19,218 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 26 treesize of output 40 [2019-01-18 18:11:19,222 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:19,223 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:19,224 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:19,225 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 28 treesize of output 54 [2019-01-18 18:11:19,228 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:19,229 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:19,230 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:19,231 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:19,232 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 30 treesize of output 72 [2019-01-18 18:11:19,240 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 71 [2019-01-18 18:11:19,241 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-18 18:11:19,270 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:19,292 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:19,310 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:19,324 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:19,336 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:19,363 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:19,364 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 48 treesize of output 54 [2019-01-18 18:11:19,396 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:19,397 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:19,398 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 41 treesize of output 53 [2019-01-18 18:11:19,431 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:19,433 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:19,434 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:19,452 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:19,453 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 32 treesize of output 61 [2019-01-18 18:11:19,515 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:19,517 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:19,518 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:19,519 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:19,520 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:19,521 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:19,522 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 41 [2019-01-18 18:11:19,522 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-01-18 18:11:19,539 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:19,555 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:19,572 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:19,606 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 18:11:19,606 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 5 variables, input treesize:72, output treesize:71 [2019-01-18 18:11:19,843 WARN L181 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2019-01-18 18:11:19,879 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:19,889 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 81 [2019-01-18 18:11:19,890 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-01-18 18:11:19,997 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 2 xjuncts. [2019-01-18 18:11:19,998 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:81, output treesize:109 [2019-01-18 18:11:20,212 WARN L181 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2019-01-18 18:11:20,217 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:20,218 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:20,219 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:20,220 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:20,221 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:20,222 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:20,223 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:20,224 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 81 [2019-01-18 18:11:20,225 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:11:20,297 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:20,299 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:20,300 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:20,305 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:20,307 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:20,308 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:20,309 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:20,310 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:20,319 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 14 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 65 treesize of output 91 [2019-01-18 18:11:20,320 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2019-01-18 18:11:20,446 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 2 dim-1 vars, End of recursive call: 9 dim-0 vars, and 3 xjuncts. [2019-01-18 18:11:20,446 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 8 variables, input treesize:129, output treesize:126 [2019-01-18 18:11:20,675 WARN L181 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2019-01-18 18:11:20,693 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:20,694 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:20,695 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:20,695 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:20,696 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:20,697 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:20,698 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:20,700 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:20,701 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:20,702 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:20,703 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:20,704 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:20,705 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:20,706 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 16 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 101 [2019-01-18 18:11:20,706 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:11:20,795 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:20,796 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:20,798 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:20,799 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:20,800 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:20,802 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:20,805 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:20,807 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:20,808 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:20,809 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:20,810 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:20,811 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:20,812 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:20,813 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:20,814 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:20,815 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 55 treesize of output 111 [2019-01-18 18:11:20,816 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-01-18 18:11:20,906 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:20,908 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:20,909 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:20,910 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:20,911 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:20,912 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:20,913 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:20,914 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:20,915 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:20,916 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:20,917 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:20,918 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:20,919 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:20,920 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 16 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 98 [2019-01-18 18:11:20,921 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-01-18 18:11:21,005 INFO L267 ElimStorePlain]: Start of recursive call 1: 11 dim-0 vars, 3 dim-1 vars, End of recursive call: 11 dim-0 vars, and 3 xjuncts. [2019-01-18 18:11:21,006 INFO L202 ElimStorePlain]: Needed 4 recursive calls to eliminate 14 variables, input treesize:159, output treesize:123 [2019-01-18 18:11:21,238 WARN L181 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2019-01-18 18:11:21,243 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:21,244 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:21,245 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:21,246 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:21,246 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:21,248 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:21,252 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:21,254 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:21,255 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:21,258 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:21,259 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:21,260 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:21,261 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:21,262 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:21,263 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:21,287 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 6 case distinctions, treesize of input 55 treesize of output 125 [2019-01-18 18:11:21,289 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 8 xjuncts. [2019-01-18 18:11:21,612 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:21,613 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:21,614 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:21,616 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:21,617 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:21,618 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:21,619 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:21,620 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:21,621 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:21,622 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:21,623 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:21,624 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:21,625 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:21,625 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 16 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 98 [2019-01-18 18:11:21,626 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-01-18 18:11:21,777 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:21,778 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:21,779 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:21,781 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:21,782 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:21,783 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:21,784 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:21,785 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:21,787 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:21,787 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 18:11:21,788 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:21,789 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 88 [2019-01-18 18:11:21,790 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-01-18 18:11:21,923 INFO L267 ElimStorePlain]: Start of recursive call 1: 13 dim-0 vars, 3 dim-1 vars, End of recursive call: 25 dim-0 vars, and 6 xjuncts. [2019-01-18 18:11:21,924 INFO L202 ElimStorePlain]: Needed 4 recursive calls to eliminate 16 variables, input treesize:156, output treesize:238 [2019-01-18 18:11:22,057 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:11:22,058 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 18:11:22,135 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:11:22,153 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 18:11:22,153 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 14 [2019-01-18 18:11:22,153 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 18:11:22,153 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-01-18 18:11:22,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-01-18 18:11:22,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2019-01-18 18:11:22,154 INFO L87 Difference]: Start difference. First operand 500 states and 3342 transitions. Second operand 11 states. [2019-01-18 18:11:22,402 WARN L181 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2019-01-18 18:11:23,019 WARN L181 SmtUtils]: Spent 575.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 36 [2019-01-18 18:11:23,504 WARN L181 SmtUtils]: Spent 416.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 51 [2019-01-18 18:11:24,016 WARN L181 SmtUtils]: Spent 377.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 57 [2019-01-18 18:11:24,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:11:24,861 INFO L93 Difference]: Finished difference Result 678 states and 4253 transitions. [2019-01-18 18:11:24,861 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-01-18 18:11:24,861 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 6 [2019-01-18 18:11:24,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:11:24,865 INFO L225 Difference]: With dead ends: 678 [2019-01-18 18:11:24,866 INFO L226 Difference]: Without dead ends: 673 [2019-01-18 18:11:24,866 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=127, Invalid=293, Unknown=0, NotChecked=0, Total=420 [2019-01-18 18:11:24,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 673 states. [2019-01-18 18:11:25,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 673 to 555. [2019-01-18 18:11:25,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 555 states. [2019-01-18 18:11:25,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 555 states to 555 states and 3727 transitions. [2019-01-18 18:11:25,089 INFO L78 Accepts]: Start accepts. Automaton has 555 states and 3727 transitions. Word has length 6 [2019-01-18 18:11:25,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:11:25,089 INFO L480 AbstractCegarLoop]: Abstraction has 555 states and 3727 transitions. [2019-01-18 18:11:25,089 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-01-18 18:11:25,089 INFO L276 IsEmpty]: Start isEmpty. Operand 555 states and 3727 transitions. [2019-01-18 18:11:25,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-01-18 18:11:25,090 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:11:25,090 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2019-01-18 18:11:25,090 INFO L423 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:11:25,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:11:25,091 INFO L82 PathProgramCache]: Analyzing trace with hash 893598680, now seen corresponding path program 2 times [2019-01-18 18:11:25,091 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:11:25,091 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:11:25,091 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:11:25,091 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:11:25,091 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:11:25,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:11:25,157 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-01-18 18:11:25,157 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:11:25,157 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 18:11:25,157 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-18 18:11:25,158 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-18 18:11:25,158 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:11:25,158 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 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 18:11:25,166 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-01-18 18:11:25,166 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-01-18 18:11:25,172 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-01-18 18:11:25,172 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-18 18:11:25,173 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 18:11:25,206 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 21 treesize of output 24 [2019-01-18 18:11:25,210 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 24 treesize of output 30 [2019-01-18 18:11:25,215 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:25,217 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:25,217 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 26 treesize of output 40 [2019-01-18 18:11:25,224 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:25,225 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:25,226 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:25,226 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 28 treesize of output 54 [2019-01-18 18:11:25,229 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:25,230 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:25,231 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:25,232 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:25,232 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 30 treesize of output 72 [2019-01-18 18:11:25,236 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:25,237 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:25,239 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:25,240 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:25,241 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:25,242 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 91 [2019-01-18 18:11:25,243 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-18 18:11:25,284 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:25,308 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:25,325 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:25,341 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:25,354 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:25,388 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:25,389 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 68 treesize of output 71 [2019-01-18 18:11:25,429 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:25,430 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:25,431 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 58 treesize of output 67 [2019-01-18 18:11:25,471 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:25,472 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:25,473 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:25,474 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:25,475 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 46 treesize of output 72 [2019-01-18 18:11:25,526 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:25,527 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:25,528 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:25,529 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:25,530 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:25,531 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:25,532 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 37 treesize of output 80 [2019-01-18 18:11:25,597 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:25,598 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:25,599 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:25,600 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:25,601 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:25,603 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:25,604 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:25,605 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:25,605 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 31 treesize of output 61 [2019-01-18 18:11:25,606 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2019-01-18 18:11:25,631 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:25,657 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:25,684 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:25,710 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:25,757 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 18:11:25,758 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 5 variables, input treesize:92, output treesize:91 [2019-01-18 18:11:25,827 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:25,828 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 41 treesize of output 97 [2019-01-18 18:11:25,828 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:11:25,934 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 18:11:25,934 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:101, output treesize:71 [2019-01-18 18:11:25,958 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:25,959 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:25,960 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:25,962 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:25,963 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:25,964 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:25,965 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:25,966 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:25,967 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 41 treesize of output 103 [2019-01-18 18:11:25,967 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:11:26,016 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 18:11:26,016 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:81, output treesize:55 [2019-01-18 18:11:26,037 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:26,037 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:26,038 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:26,039 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:26,040 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:26,041 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:26,042 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:26,044 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:26,045 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:26,046 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:26,047 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:26,048 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:26,049 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:26,050 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:26,051 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:26,052 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 43 treesize of output 123 [2019-01-18 18:11:26,052 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:11:26,106 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-18 18:11:26,107 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:67, output treesize:55 [2019-01-18 18:11:26,130 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:26,132 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:26,133 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:26,134 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:26,135 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:26,136 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:26,137 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:26,138 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:26,139 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:26,140 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:26,141 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:26,142 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:26,143 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:26,144 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:26,145 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:26,146 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 43 treesize of output 135 [2019-01-18 18:11:26,147 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:11:26,224 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. [2019-01-18 18:11:26,224 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:67, output treesize:45 [2019-01-18 18:11:26,249 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:11:26,249 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 18:11:26,338 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:11:26,357 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 18:11:26,357 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 14 [2019-01-18 18:11:26,357 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 18:11:26,357 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-01-18 18:11:26,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-01-18 18:11:26,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2019-01-18 18:11:26,358 INFO L87 Difference]: Start difference. First operand 555 states and 3727 transitions. Second operand 11 states. [2019-01-18 18:11:27,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:11:27,253 INFO L93 Difference]: Finished difference Result 704 states and 4501 transitions. [2019-01-18 18:11:27,254 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-01-18 18:11:27,254 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 6 [2019-01-18 18:11:27,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:11:27,258 INFO L225 Difference]: With dead ends: 704 [2019-01-18 18:11:27,258 INFO L226 Difference]: Without dead ends: 703 [2019-01-18 18:11:27,259 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=197, Unknown=0, NotChecked=0, Total=306 [2019-01-18 18:11:27,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 703 states. [2019-01-18 18:11:27,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 703 to 655. [2019-01-18 18:11:27,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 655 states. [2019-01-18 18:11:27,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 655 states to 655 states and 4427 transitions. [2019-01-18 18:11:27,474 INFO L78 Accepts]: Start accepts. Automaton has 655 states and 4427 transitions. Word has length 6 [2019-01-18 18:11:27,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:11:27,474 INFO L480 AbstractCegarLoop]: Abstraction has 655 states and 4427 transitions. [2019-01-18 18:11:27,474 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-01-18 18:11:27,474 INFO L276 IsEmpty]: Start isEmpty. Operand 655 states and 4427 transitions. [2019-01-18 18:11:27,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-01-18 18:11:27,475 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:11:27,475 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-01-18 18:11:27,476 INFO L423 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:11:27,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:11:27,476 INFO L82 PathProgramCache]: Analyzing trace with hash 893604446, now seen corresponding path program 2 times [2019-01-18 18:11:27,476 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:11:27,476 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:11:27,476 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-18 18:11:27,476 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:11:27,477 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:11:27,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:11:27,657 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:11:27,657 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:11:27,657 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 18:11:27,658 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-18 18:11:27,658 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-18 18:11:27,658 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:11:27,658 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 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 18:11:27,667 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-01-18 18:11:27,667 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-01-18 18:11:27,673 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-01-18 18:11:27,673 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-18 18:11:27,674 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 18:11:27,694 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 21 treesize of output 24 [2019-01-18 18:11:27,696 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 24 treesize of output 30 [2019-01-18 18:11:27,712 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:27,713 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:27,713 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 26 treesize of output 40 [2019-01-18 18:11:27,717 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:27,718 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:27,719 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:27,720 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 28 treesize of output 54 [2019-01-18 18:11:27,724 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:27,725 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:27,725 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:27,726 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:27,727 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 30 treesize of output 72 [2019-01-18 18:11:27,730 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:27,731 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:27,732 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:27,733 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:27,733 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:27,734 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 91 [2019-01-18 18:11:27,735 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-18 18:11:27,782 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:27,804 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:27,823 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:27,838 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:27,852 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:27,885 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:27,885 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 68 treesize of output 71 [2019-01-18 18:11:27,922 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:27,924 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:27,924 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 58 treesize of output 67 [2019-01-18 18:11:27,967 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:27,968 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:27,969 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:27,970 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:27,971 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 46 treesize of output 72 [2019-01-18 18:11:28,022 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:28,024 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:28,025 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:28,026 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:28,027 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:28,028 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:28,029 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 37 treesize of output 80 [2019-01-18 18:11:28,092 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:28,093 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:28,094 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:28,096 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:28,097 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:28,098 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:28,099 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:28,100 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:28,101 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 31 treesize of output 61 [2019-01-18 18:11:28,101 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2019-01-18 18:11:28,127 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:28,152 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:28,178 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:28,205 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:28,250 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-01-18 18:11:28,250 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 4 variables, input treesize:92, output treesize:91 [2019-01-18 18:11:28,283 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:28,284 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 41 treesize of output 97 [2019-01-18 18:11:28,284 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:11:28,328 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-01-18 18:11:28,329 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:101, output treesize:71 [2019-01-18 18:11:28,356 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:28,358 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:28,359 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:28,360 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:28,361 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:28,362 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:28,363 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:28,364 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:28,365 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 41 treesize of output 103 [2019-01-18 18:11:28,366 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:11:28,411 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 18:11:28,411 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:81, output treesize:55 [2019-01-18 18:11:28,441 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:28,442 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:28,443 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:28,445 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:28,446 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:28,447 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:28,448 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:28,450 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:28,451 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:28,452 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:28,453 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:28,454 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 18:11:28,455 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:28,455 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 43 treesize of output 122 [2019-01-18 18:11:28,456 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:11:28,507 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-18 18:11:28,507 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:67, output treesize:47 [2019-01-18 18:11:28,530 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:28,531 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:28,532 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:28,532 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:28,533 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:28,535 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:28,536 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:28,537 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:28,538 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:28,539 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:28,540 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:28,541 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:28,542 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:28,542 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 18:11:28,543 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:28,544 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 45 treesize of output 124 [2019-01-18 18:11:28,545 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:11:28,595 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. [2019-01-18 18:11:28,595 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:61, output treesize:49 [2019-01-18 18:11:28,622 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:11:28,622 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 18:11:28,676 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:11:28,694 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 18:11:28,694 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 14 [2019-01-18 18:11:28,694 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 18:11:28,694 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-01-18 18:11:28,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-01-18 18:11:28,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2019-01-18 18:11:28,694 INFO L87 Difference]: Start difference. First operand 655 states and 4427 transitions. Second operand 12 states. [2019-01-18 18:11:30,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:11:30,253 INFO L93 Difference]: Finished difference Result 1218 states and 7896 transitions. [2019-01-18 18:11:30,253 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-01-18 18:11:30,253 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 6 [2019-01-18 18:11:30,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:11:30,261 INFO L225 Difference]: With dead ends: 1218 [2019-01-18 18:11:30,261 INFO L226 Difference]: Without dead ends: 1217 [2019-01-18 18:11:30,262 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=111, Invalid=195, Unknown=0, NotChecked=0, Total=306 [2019-01-18 18:11:30,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1217 states. [2019-01-18 18:11:30,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1217 to 738. [2019-01-18 18:11:30,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 738 states. [2019-01-18 18:11:30,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 738 states to 738 states and 5008 transitions. [2019-01-18 18:11:30,721 INFO L78 Accepts]: Start accepts. Automaton has 738 states and 5008 transitions. Word has length 6 [2019-01-18 18:11:30,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:11:30,721 INFO L480 AbstractCegarLoop]: Abstraction has 738 states and 5008 transitions. [2019-01-18 18:11:30,721 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-01-18 18:11:30,721 INFO L276 IsEmpty]: Start isEmpty. Operand 738 states and 5008 transitions. [2019-01-18 18:11:30,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-01-18 18:11:30,722 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:11:30,722 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-01-18 18:11:30,722 INFO L423 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:11:30,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:11:30,722 INFO L82 PathProgramCache]: Analyzing trace with hash 893724170, now seen corresponding path program 1 times [2019-01-18 18:11:30,722 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:11:30,723 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:11:30,723 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-18 18:11:30,723 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:11:30,723 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:11:30,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:11:30,878 WARN L181 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2019-01-18 18:11:30,900 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-01-18 18:11:30,900 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:11:30,900 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 18:11:30,900 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2019-01-18 18:11:30,900 INFO L207 CegarAbsIntRunner]: [0], [6], [22], [24], [28], [29] [2019-01-18 18:11:30,901 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-18 18:11:30,901 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 18:11:31,189 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 18:11:31,189 INFO L272 AbstractInterpreter]: Visited 6 different actions 10 times. Merged at 1 different actions 1 times. Never widened. Found 6 fixpoints after 4 different actions. Largest state had 0 variables. [2019-01-18 18:11:31,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:11:31,190 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 18:11:31,190 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:11:31,190 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 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 18:11:31,199 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:11:31,199 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 18:11:31,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:11:31,204 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 18:11:31,235 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 21 treesize of output 24 [2019-01-18 18:11:31,238 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 24 treesize of output 30 [2019-01-18 18:11:31,242 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:31,244 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:31,244 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 26 treesize of output 40 [2019-01-18 18:11:31,253 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:31,255 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:31,257 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:31,258 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 28 treesize of output 54 [2019-01-18 18:11:31,264 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:31,265 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:31,267 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:31,269 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:31,270 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 30 treesize of output 72 [2019-01-18 18:11:31,278 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:31,279 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:31,279 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:31,280 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:31,281 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:31,281 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 91 [2019-01-18 18:11:31,282 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-18 18:11:31,320 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:31,343 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:31,365 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:31,382 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:31,399 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:31,431 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:31,432 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 68 treesize of output 71 [2019-01-18 18:11:31,473 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:31,474 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:31,475 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 58 treesize of output 67 [2019-01-18 18:11:31,518 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:31,520 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:31,521 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:31,522 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:31,523 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 46 treesize of output 72 [2019-01-18 18:11:31,572 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:31,574 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:31,575 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:31,576 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:31,577 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:31,578 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:31,579 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 37 treesize of output 80 [2019-01-18 18:11:31,644 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:31,646 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:31,647 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:31,648 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:31,649 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:31,650 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:31,651 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:31,652 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:31,653 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 31 treesize of output 61 [2019-01-18 18:11:31,654 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2019-01-18 18:11:31,681 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:31,707 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:31,734 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:31,761 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:31,808 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-01-18 18:11:31,808 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 4 variables, input treesize:92, output treesize:91 [2019-01-18 18:11:31,845 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:31,846 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 41 treesize of output 97 [2019-01-18 18:11:31,846 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:11:31,892 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 18:11:31,893 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:101, output treesize:71 [2019-01-18 18:11:31,924 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:31,925 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:31,926 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:31,927 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:31,928 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:31,929 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:31,930 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:31,931 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 18:11:31,932 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 41 treesize of output 105 [2019-01-18 18:11:31,932 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:11:31,979 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-18 18:11:31,979 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:81, output treesize:59 [2019-01-18 18:11:32,008 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:32,009 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:32,011 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:32,012 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:32,013 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:32,014 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:32,015 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:32,016 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:32,017 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:32,018 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:32,019 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:32,020 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 41 treesize of output 111 [2019-01-18 18:11:32,021 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:11:32,069 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. [2019-01-18 18:11:32,070 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:69, output treesize:47 [2019-01-18 18:11:32,096 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:11:32,096 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 18:11:32,136 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:11:32,156 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 18:11:32,156 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2019-01-18 18:11:32,156 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 18:11:32,156 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-01-18 18:11:32,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-01-18 18:11:32,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2019-01-18 18:11:32,157 INFO L87 Difference]: Start difference. First operand 738 states and 5008 transitions. Second operand 10 states. [2019-01-18 18:11:33,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:11:33,101 INFO L93 Difference]: Finished difference Result 814 states and 5311 transitions. [2019-01-18 18:11:33,102 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-01-18 18:11:33,102 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 6 [2019-01-18 18:11:33,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:11:33,106 INFO L225 Difference]: With dead ends: 814 [2019-01-18 18:11:33,106 INFO L226 Difference]: Without dead ends: 811 [2019-01-18 18:11:33,106 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2019-01-18 18:11:33,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 811 states. [2019-01-18 18:11:33,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 811 to 775. [2019-01-18 18:11:33,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 775 states. [2019-01-18 18:11:33,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 775 states to 775 states and 5267 transitions. [2019-01-18 18:11:33,417 INFO L78 Accepts]: Start accepts. Automaton has 775 states and 5267 transitions. Word has length 6 [2019-01-18 18:11:33,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:11:33,417 INFO L480 AbstractCegarLoop]: Abstraction has 775 states and 5267 transitions. [2019-01-18 18:11:33,417 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-01-18 18:11:33,417 INFO L276 IsEmpty]: Start isEmpty. Operand 775 states and 5267 transitions. [2019-01-18 18:11:33,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-01-18 18:11:33,419 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:11:33,419 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-01-18 18:11:33,419 INFO L423 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:11:33,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:11:33,419 INFO L82 PathProgramCache]: Analyzing trace with hash 893714560, now seen corresponding path program 1 times [2019-01-18 18:11:33,419 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:11:33,420 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:11:33,420 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:11:33,420 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:11:33,420 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:11:33,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:11:33,500 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-01-18 18:11:33,500 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:11:33,500 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 18:11:33,500 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2019-01-18 18:11:33,501 INFO L207 CegarAbsIntRunner]: [0], [6], [14], [22], [28], [29] [2019-01-18 18:11:33,501 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-18 18:11:33,502 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 18:11:33,772 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 18:11:33,773 INFO L272 AbstractInterpreter]: Visited 6 different actions 10 times. Merged at 1 different actions 1 times. Never widened. Found 6 fixpoints after 4 different actions. Largest state had 0 variables. [2019-01-18 18:11:33,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:11:33,773 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 18:11:33,773 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:11:33,773 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 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 18:11:33,782 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:11:33,782 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 18:11:33,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:11:33,787 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 18:11:33,815 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:33,815 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 48 treesize of output 54 [2019-01-18 18:11:33,862 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:33,863 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:33,864 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 41 treesize of output 53 [2019-01-18 18:11:33,898 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:33,899 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:33,901 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:33,902 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:33,902 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 32 treesize of output 61 [2019-01-18 18:11:33,947 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:33,948 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:33,948 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:33,949 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:33,950 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:33,951 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:33,952 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 41 [2019-01-18 18:11:33,952 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2019-01-18 18:11:33,969 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:33,986 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:34,003 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:34,027 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-01-18 18:11:34,031 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2019-01-18 18:11:34,034 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2019-01-18 18:11:34,037 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2019-01-18 18:11:34,040 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 30 treesize of output 72 [2019-01-18 18:11:34,050 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 71 [2019-01-18 18:11:34,050 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-01-18 18:11:34,076 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:34,097 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:34,113 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:34,126 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:34,138 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:34,171 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-01-18 18:11:34,171 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 4 variables, input treesize:72, output treesize:71 [2019-01-18 18:11:34,227 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:34,227 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 72 [2019-01-18 18:11:34,227 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:11:34,257 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-01-18 18:11:34,257 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:76, output treesize:50 [2019-01-18 18:11:34,285 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:34,286 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:34,287 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:34,288 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:34,288 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:34,289 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:34,290 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 18:11:34,291 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 80 [2019-01-18 18:11:34,291 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:11:34,323 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 18:11:34,323 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:60, output treesize:42 [2019-01-18 18:11:34,347 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:34,349 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:34,350 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:34,351 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:34,352 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:34,354 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:34,355 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:34,356 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:34,356 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 18:11:34,357 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 80 [2019-01-18 18:11:34,358 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:11:34,387 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-18 18:11:34,388 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:52, output treesize:42 [2019-01-18 18:11:34,422 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:11:34,422 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 18:11:34,459 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:11:34,479 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 18:11:34,479 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4, 4] total 11 [2019-01-18 18:11:34,479 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 18:11:34,479 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-01-18 18:11:34,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-01-18 18:11:34,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2019-01-18 18:11:34,479 INFO L87 Difference]: Start difference. First operand 775 states and 5267 transitions. Second operand 9 states. [2019-01-18 18:11:35,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:11:35,365 INFO L93 Difference]: Finished difference Result 812 states and 5339 transitions. [2019-01-18 18:11:35,365 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-01-18 18:11:35,365 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 6 [2019-01-18 18:11:35,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:11:35,368 INFO L225 Difference]: With dead ends: 812 [2019-01-18 18:11:35,368 INFO L226 Difference]: Without dead ends: 811 [2019-01-18 18:11:35,368 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2019-01-18 18:11:35,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 811 states. [2019-01-18 18:11:35,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 811 to 780. [2019-01-18 18:11:35,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 780 states. [2019-01-18 18:11:35,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 780 states to 780 states and 5302 transitions. [2019-01-18 18:11:35,666 INFO L78 Accepts]: Start accepts. Automaton has 780 states and 5302 transitions. Word has length 6 [2019-01-18 18:11:35,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:11:35,666 INFO L480 AbstractCegarLoop]: Abstraction has 780 states and 5302 transitions. [2019-01-18 18:11:35,666 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-01-18 18:11:35,667 INFO L276 IsEmpty]: Start isEmpty. Operand 780 states and 5302 transitions. [2019-01-18 18:11:35,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-01-18 18:11:35,668 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:11:35,668 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-01-18 18:11:35,668 INFO L423 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:11:35,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:11:35,668 INFO L82 PathProgramCache]: Analyzing trace with hash 893787660, now seen corresponding path program 1 times [2019-01-18 18:11:35,668 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:11:35,669 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:11:35,669 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:11:35,669 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:11:35,669 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:11:35,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:11:35,859 WARN L181 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 16 [2019-01-18 18:11:35,874 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-01-18 18:11:35,874 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:11:35,875 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 18:11:35,875 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2019-01-18 18:11:35,875 INFO L207 CegarAbsIntRunner]: [0], [6], [24], [28], [30], [31] [2019-01-18 18:11:35,876 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-18 18:11:35,876 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 18:11:36,111 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 18:11:36,111 INFO L272 AbstractInterpreter]: Visited 6 different actions 9 times. Merged at 1 different actions 1 times. Never widened. Found 4 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-18 18:11:36,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:11:36,112 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 18:11:36,112 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:11:36,112 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 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 18:11:36,120 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:11:36,120 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 18:11:36,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:11:36,125 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 18:11:36,129 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 21 treesize of output 24 [2019-01-18 18:11:36,133 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 24 treesize of output 26 [2019-01-18 18:11:36,145 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:36,147 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:36,147 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 26 treesize of output 36 [2019-01-18 18:11:36,156 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:36,158 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:36,162 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:36,162 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 28 treesize of output 50 [2019-01-18 18:11:36,169 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:36,175 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:36,177 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:36,178 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:36,179 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 68 [2019-01-18 18:11:36,188 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:36,189 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:36,190 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:36,194 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:36,195 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:36,195 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 14 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 87 [2019-01-18 18:11:36,196 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-18 18:11:36,232 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:36,252 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:36,269 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:36,281 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:36,293 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:36,320 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 63 treesize of output 56 [2019-01-18 18:11:36,336 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:36,338 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:36,339 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 53 treesize of output 63 [2019-01-18 18:11:36,377 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:36,378 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:36,380 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:36,382 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:36,382 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 46 treesize of output 68 [2019-01-18 18:11:36,430 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:36,431 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:36,432 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:36,433 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:36,434 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:36,436 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:36,437 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 76 [2019-01-18 18:11:36,497 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:36,498 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:36,500 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:36,501 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:36,502 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:36,503 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:36,504 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:36,506 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:36,507 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2019-01-18 18:11:36,507 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2019-01-18 18:11:36,530 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:36,554 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:36,579 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:36,618 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:36,659 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 18:11:36,659 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 5 variables, input treesize:84, output treesize:87 [2019-01-18 18:11:36,797 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:36,797 INFO L303 Elim1Store]: Index analysis took 111 ms [2019-01-18 18:11:36,923 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 97 [2019-01-18 18:11:36,924 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-01-18 18:11:37,197 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 7 dim-0 vars, and 2 xjuncts. [2019-01-18 18:11:37,197 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:97, output treesize:138 [2019-01-18 18:11:37,315 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:37,316 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:37,316 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:37,317 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 86 [2019-01-18 18:11:37,317 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:11:37,351 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-18 18:11:37,351 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:76, output treesize:38 [2019-01-18 18:11:37,372 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:11:37,372 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 18:11:37,388 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:11:37,407 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 18:11:37,407 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 8 [2019-01-18 18:11:37,407 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 18:11:37,407 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-18 18:11:37,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-18 18:11:37,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2019-01-18 18:11:37,408 INFO L87 Difference]: Start difference. First operand 780 states and 5302 transitions. Second operand 8 states. [2019-01-18 18:11:38,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:11:38,097 INFO L93 Difference]: Finished difference Result 843 states and 5575 transitions. [2019-01-18 18:11:38,097 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-01-18 18:11:38,097 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 6 [2019-01-18 18:11:38,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:11:38,100 INFO L225 Difference]: With dead ends: 843 [2019-01-18 18:11:38,100 INFO L226 Difference]: Without dead ends: 842 [2019-01-18 18:11:38,100 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2019-01-18 18:11:38,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 842 states. [2019-01-18 18:11:38,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 842 to 813. [2019-01-18 18:11:38,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 813 states. [2019-01-18 18:11:38,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 813 states to 813 states and 5533 transitions. [2019-01-18 18:11:38,413 INFO L78 Accepts]: Start accepts. Automaton has 813 states and 5533 transitions. Word has length 6 [2019-01-18 18:11:38,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:11:38,413 INFO L480 AbstractCegarLoop]: Abstraction has 813 states and 5533 transitions. [2019-01-18 18:11:38,413 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-18 18:11:38,413 INFO L276 IsEmpty]: Start isEmpty. Operand 813 states and 5533 transitions. [2019-01-18 18:11:38,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-01-18 18:11:38,414 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:11:38,414 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-01-18 18:11:38,414 INFO L423 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:11:38,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:11:38,415 INFO L82 PathProgramCache]: Analyzing trace with hash 893774142, now seen corresponding path program 1 times [2019-01-18 18:11:38,415 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:11:38,415 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:11:38,416 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:11:38,416 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:11:38,416 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:11:38,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:11:38,477 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-01-18 18:11:38,478 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:11:38,478 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 18:11:38,478 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2019-01-18 18:11:38,478 INFO L207 CegarAbsIntRunner]: [0], [6], [14], [24], [28], [29] [2019-01-18 18:11:38,478 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-18 18:11:38,479 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 18:11:38,773 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 18:11:38,773 INFO L272 AbstractInterpreter]: Visited 6 different actions 10 times. Merged at 1 different actions 1 times. Never widened. Found 6 fixpoints after 4 different actions. Largest state had 0 variables. [2019-01-18 18:11:38,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:11:38,774 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 18:11:38,774 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:11:38,774 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 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 18:11:38,787 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:11:38,787 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 18:11:38,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:11:38,801 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 18:11:38,826 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:38,826 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 48 treesize of output 54 [2019-01-18 18:11:38,868 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:38,870 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:38,870 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 41 treesize of output 53 [2019-01-18 18:11:38,913 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:38,914 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:38,916 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:38,917 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:38,917 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 32 treesize of output 61 [2019-01-18 18:11:38,960 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:38,962 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:38,963 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:38,964 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:38,966 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:38,968 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:38,969 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 41 [2019-01-18 18:11:38,969 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2019-01-18 18:11:38,989 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:39,011 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:39,034 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:39,064 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-01-18 18:11:39,066 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2019-01-18 18:11:39,068 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2019-01-18 18:11:39,071 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2019-01-18 18:11:39,074 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 30 treesize of output 72 [2019-01-18 18:11:39,083 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 71 [2019-01-18 18:11:39,083 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-01-18 18:11:39,108 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:39,129 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:39,146 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:39,159 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:39,171 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:39,205 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-01-18 18:11:39,205 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 4 variables, input treesize:72, output treesize:71 [2019-01-18 18:11:39,298 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:39,308 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 81 [2019-01-18 18:11:39,309 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-01-18 18:11:39,419 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 2 xjuncts. [2019-01-18 18:11:39,420 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:81, output treesize:106 [2019-01-18 18:11:39,567 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:39,626 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:39,693 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:39,719 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:39,742 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:39,852 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:39,878 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:39,902 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:39,902 INFO L303 Elim1Store]: Index analysis took 376 ms [2019-01-18 18:11:40,159 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 14 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 8 case distinctions, treesize of input 65 treesize of output 103 [2019-01-18 18:11:40,163 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 16 xjuncts. [2019-01-18 18:11:40,470 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:40,471 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:40,472 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:40,473 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:40,474 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:40,474 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 18:11:40,475 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 88 [2019-01-18 18:11:40,476 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-01-18 18:11:40,638 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 2 dim-1 vars, End of recursive call: 19 dim-0 vars, and 6 xjuncts. [2019-01-18 18:11:40,639 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 9 variables, input treesize:126, output treesize:278 [2019-01-18 18:11:41,573 WARN L181 SmtUtils]: Spent 911.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 103 [2019-01-18 18:11:41,580 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:41,581 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 88 [2019-01-18 18:11:41,581 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:11:41,738 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:41,740 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:41,741 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:41,742 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:41,743 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:41,745 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:41,746 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:41,747 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:41,748 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:41,748 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 18:11:41,750 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:41,750 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 100 [2019-01-18 18:11:41,751 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-01-18 18:11:41,866 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:41,867 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:41,868 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:41,868 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:41,870 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:41,871 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:41,872 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:41,873 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:41,874 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:41,875 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 18:11:41,876 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:41,877 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 94 [2019-01-18 18:11:41,877 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-01-18 18:11:41,994 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:41,995 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:41,996 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:41,997 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:41,998 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:41,999 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:42,001 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:42,002 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:42,003 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:42,004 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:42,005 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:42,005 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 18:11:42,006 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 98 [2019-01-18 18:11:42,007 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2019-01-18 18:11:42,110 INFO L267 ElimStorePlain]: Start of recursive call 1: 16 dim-0 vars, 4 dim-1 vars, End of recursive call: 16 dim-0 vars, and 4 xjuncts. [2019-01-18 18:11:42,111 INFO L202 ElimStorePlain]: Needed 5 recursive calls to eliminate 20 variables, input treesize:227, output treesize:173 [2019-01-18 18:11:42,230 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:11:42,230 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 18:11:42,292 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:11:42,311 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 18:11:42,312 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2019-01-18 18:11:42,312 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 18:11:42,312 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-01-18 18:11:42,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-01-18 18:11:42,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2019-01-18 18:11:42,312 INFO L87 Difference]: Start difference. First operand 813 states and 5533 transitions. Second operand 10 states. [2019-01-18 18:11:42,501 WARN L181 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 46 [2019-01-18 18:11:42,769 WARN L181 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 65 [2019-01-18 18:11:43,161 WARN L181 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 87 [2019-01-18 18:11:43,773 WARN L181 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 83 [2019-01-18 18:11:44,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:11:44,079 INFO L93 Difference]: Finished difference Result 896 states and 5824 transitions. [2019-01-18 18:11:44,080 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-01-18 18:11:44,080 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 6 [2019-01-18 18:11:44,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:11:44,084 INFO L225 Difference]: With dead ends: 896 [2019-01-18 18:11:44,084 INFO L226 Difference]: Without dead ends: 895 [2019-01-18 18:11:44,084 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=119, Invalid=223, Unknown=0, NotChecked=0, Total=342 [2019-01-18 18:11:44,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 895 states. [2019-01-18 18:11:44,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 895 to 848. [2019-01-18 18:11:44,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 848 states. [2019-01-18 18:11:44,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 848 states to 848 states and 5778 transitions. [2019-01-18 18:11:44,419 INFO L78 Accepts]: Start accepts. Automaton has 848 states and 5778 transitions. Word has length 6 [2019-01-18 18:11:44,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:11:44,419 INFO L480 AbstractCegarLoop]: Abstraction has 848 states and 5778 transitions. [2019-01-18 18:11:44,419 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-01-18 18:11:44,419 INFO L276 IsEmpty]: Start isEmpty. Operand 848 states and 5778 transitions. [2019-01-18 18:11:44,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-01-18 18:11:44,421 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:11:44,421 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-01-18 18:11:44,421 INFO L423 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:11:44,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:11:44,421 INFO L82 PathProgramCache]: Analyzing trace with hash 893364756, now seen corresponding path program 1 times [2019-01-18 18:11:44,422 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:11:44,422 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:11:44,422 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:11:44,422 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:11:44,423 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:11:44,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:11:44,502 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:11:44,502 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:11:44,502 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 18:11:44,502 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2019-01-18 18:11:44,503 INFO L207 CegarAbsIntRunner]: [0], [6], [10], [22], [28], [29] [2019-01-18 18:11:44,504 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-18 18:11:44,504 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 18:11:44,800 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 18:11:44,800 INFO L272 AbstractInterpreter]: Visited 6 different actions 10 times. Merged at 1 different actions 1 times. Never widened. Found 6 fixpoints after 4 different actions. Largest state had 0 variables. [2019-01-18 18:11:44,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:11:44,800 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 18:11:44,801 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:11:44,801 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 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 18:11:44,808 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:11:44,809 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 18:11:44,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:11:44,813 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 18:11:44,838 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:44,838 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 48 treesize of output 54 [2019-01-18 18:11:44,882 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:44,884 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:44,884 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 41 treesize of output 53 [2019-01-18 18:11:44,920 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:44,921 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:44,922 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:44,923 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:44,924 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 32 treesize of output 61 [2019-01-18 18:11:44,967 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:44,968 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:44,970 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:44,971 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:44,972 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:44,973 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:44,974 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 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 41 [2019-01-18 18:11:44,974 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2019-01-18 18:11:44,991 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:45,007 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:45,024 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:45,046 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-01-18 18:11:45,049 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2019-01-18 18:11:45,052 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2019-01-18 18:11:45,055 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2019-01-18 18:11:45,058 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 30 treesize of output 72 [2019-01-18 18:11:45,065 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 71 [2019-01-18 18:11:45,065 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-01-18 18:11:45,090 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:45,111 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:45,125 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:45,137 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:45,150 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:45,183 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 18:11:45,183 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 5 variables, input treesize:72, output treesize:71 [2019-01-18 18:11:45,223 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:45,224 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 72 [2019-01-18 18:11:45,225 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:11:45,256 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 18:11:45,256 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:76, output treesize:50 [2019-01-18 18:11:45,280 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:45,281 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:45,281 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:45,282 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:45,283 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:45,284 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:45,285 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:45,286 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 86 [2019-01-18 18:11:45,286 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:11:45,322 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 18:11:45,322 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:60, output treesize:38 [2019-01-18 18:11:45,343 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:45,344 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:45,344 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:45,345 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:45,346 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:45,347 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:45,348 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:45,349 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:45,350 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:45,351 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:45,352 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:45,353 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 18:11:45,355 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 98 [2019-01-18 18:11:45,356 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:11:45,521 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-18 18:11:45,521 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:50, output treesize:36 [2019-01-18 18:11:45,539 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:11:45,539 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 18:11:45,571 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:11:45,591 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 18:11:45,591 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2019-01-18 18:11:45,591 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 18:11:45,591 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-01-18 18:11:45,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-01-18 18:11:45,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2019-01-18 18:11:45,592 INFO L87 Difference]: Start difference. First operand 848 states and 5778 transitions. Second operand 10 states. [2019-01-18 18:11:46,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:11:46,548 INFO L93 Difference]: Finished difference Result 975 states and 6393 transitions. [2019-01-18 18:11:46,548 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-01-18 18:11:46,548 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 6 [2019-01-18 18:11:46,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:11:46,552 INFO L225 Difference]: With dead ends: 975 [2019-01-18 18:11:46,553 INFO L226 Difference]: Without dead ends: 973 [2019-01-18 18:11:46,553 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=152, Unknown=0, NotChecked=0, Total=240 [2019-01-18 18:11:46,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 973 states. [2019-01-18 18:11:46,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 973 to 930. [2019-01-18 18:11:46,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 930 states. [2019-01-18 18:11:46,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 930 states to 930 states and 6346 transitions. [2019-01-18 18:11:46,946 INFO L78 Accepts]: Start accepts. Automaton has 930 states and 6346 transitions. Word has length 6 [2019-01-18 18:11:46,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:11:46,946 INFO L480 AbstractCegarLoop]: Abstraction has 930 states and 6346 transitions. [2019-01-18 18:11:46,946 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-01-18 18:11:46,946 INFO L276 IsEmpty]: Start isEmpty. Operand 930 states and 6346 transitions. [2019-01-18 18:11:46,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-01-18 18:11:46,949 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:11:46,949 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-01-18 18:11:46,949 INFO L423 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:11:46,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:11:46,950 INFO L82 PathProgramCache]: Analyzing trace with hash 893370586, now seen corresponding path program 1 times [2019-01-18 18:11:46,950 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:11:46,950 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:11:46,950 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:11:46,951 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:11:46,951 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:11:46,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:11:47,118 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-01-18 18:11:47,118 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:11:47,118 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 18:11:47,119 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2019-01-18 18:11:47,119 INFO L207 CegarAbsIntRunner]: [0], [6], [10], [28], [30], [31] [2019-01-18 18:11:47,120 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-18 18:11:47,120 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 18:11:47,354 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 18:11:47,354 INFO L272 AbstractInterpreter]: Visited 6 different actions 9 times. Merged at 1 different actions 1 times. Never widened. Found 4 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-18 18:11:47,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:11:47,355 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 18:11:47,355 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:11:47,355 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 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 18:11:47,365 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:11:47,365 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 18:11:47,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:11:47,370 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 18:11:47,376 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 21 treesize of output 24 [2019-01-18 18:11:47,380 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 24 treesize of output 26 [2019-01-18 18:11:47,390 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:47,392 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:47,392 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 26 treesize of output 36 [2019-01-18 18:11:47,405 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:47,407 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:47,409 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:47,409 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 28 treesize of output 50 [2019-01-18 18:11:47,417 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:47,421 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:47,423 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:47,425 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:47,425 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 68 [2019-01-18 18:11:47,439 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 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 32 treesize of output 67 [2019-01-18 18:11:47,439 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-18 18:11:47,466 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:47,485 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:47,501 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:47,513 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:47,526 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:47,549 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 43 treesize of output 39 [2019-01-18 18:11:47,563 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:47,566 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:47,566 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 36 treesize of output 49 [2019-01-18 18:11:47,597 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:47,599 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:47,601 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:47,602 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:47,603 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 32 treesize of output 57 [2019-01-18 18:11:47,642 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:47,643 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:47,644 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:47,645 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:47,646 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:47,648 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:47,649 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 37 [2019-01-18 18:11:47,650 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-01-18 18:11:47,664 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:47,677 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:47,694 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:47,724 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 18:11:47,724 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 5 variables, input treesize:64, output treesize:67 [2019-01-18 18:11:47,760 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:47,769 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 72 [2019-01-18 18:11:47,770 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-01-18 18:11:47,861 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 2 xjuncts. [2019-01-18 18:11:47,862 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:72, output treesize:88 [2019-01-18 18:11:47,900 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:47,901 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:47,902 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:47,904 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:47,905 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:47,906 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:47,907 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:47,908 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 86 [2019-01-18 18:11:47,908 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:11:47,969 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:47,970 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:47,971 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:47,972 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:47,973 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 18:11:47,973 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 59 [2019-01-18 18:11:47,974 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-01-18 18:11:48,016 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 2 dim-1 vars, End of recursive call: 7 dim-0 vars, and 2 xjuncts. [2019-01-18 18:11:48,017 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 9 variables, input treesize:108, output treesize:84 [2019-01-18 18:11:48,086 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:11:48,086 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 18:11:48,102 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:11:48,120 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 18:11:48,121 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 8 [2019-01-18 18:11:48,121 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 18:11:48,121 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-18 18:11:48,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-18 18:11:48,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2019-01-18 18:11:48,121 INFO L87 Difference]: Start difference. First operand 930 states and 6346 transitions. Second operand 8 states. [2019-01-18 18:11:48,481 WARN L181 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 76 [2019-01-18 18:11:49,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:11:49,429 INFO L93 Difference]: Finished difference Result 985 states and 6551 transitions. [2019-01-18 18:11:49,430 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-01-18 18:11:49,430 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 6 [2019-01-18 18:11:49,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:11:49,432 INFO L225 Difference]: With dead ends: 985 [2019-01-18 18:11:49,432 INFO L226 Difference]: Without dead ends: 984 [2019-01-18 18:11:49,433 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=69, Invalid=113, Unknown=0, NotChecked=0, Total=182 [2019-01-18 18:11:49,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 984 states. [2019-01-18 18:11:49,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 984 to 951. [2019-01-18 18:11:49,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 951 states. [2019-01-18 18:11:49,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 951 states to 951 states and 6492 transitions. [2019-01-18 18:11:49,810 INFO L78 Accepts]: Start accepts. Automaton has 951 states and 6492 transitions. Word has length 6 [2019-01-18 18:11:49,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:11:49,810 INFO L480 AbstractCegarLoop]: Abstraction has 951 states and 6492 transitions. [2019-01-18 18:11:49,810 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-18 18:11:49,810 INFO L276 IsEmpty]: Start isEmpty. Operand 951 states and 6492 transitions. [2019-01-18 18:11:49,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-01-18 18:11:49,812 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:11:49,812 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-01-18 18:11:49,813 INFO L423 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:11:49,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:11:49,813 INFO L82 PathProgramCache]: Analyzing trace with hash 908380782, now seen corresponding path program 1 times [2019-01-18 18:11:49,813 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:11:49,813 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:11:49,813 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:11:49,813 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:11:49,813 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:11:49,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:11:49,965 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:11:49,965 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:11:49,965 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 18:11:49,966 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2019-01-18 18:11:49,966 INFO L207 CegarAbsIntRunner]: [0], [10], [18], [22], [24], [27] [2019-01-18 18:11:49,966 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-18 18:11:49,966 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 18:11:50,317 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 18:11:50,318 INFO L272 AbstractInterpreter]: Visited 6 different actions 11 times. Merged at 1 different actions 1 times. Never widened. Found 8 fixpoints after 5 different actions. Largest state had 0 variables. [2019-01-18 18:11:50,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:11:50,318 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 18:11:50,318 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:11:50,318 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 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 18:11:50,326 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:11:50,326 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 18:11:50,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:11:50,332 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 18:11:50,357 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:50,357 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 68 treesize of output 71 [2019-01-18 18:11:50,406 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:50,409 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:50,409 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 58 treesize of output 67 [2019-01-18 18:11:50,451 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:50,452 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:50,453 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:50,454 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:50,455 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 46 treesize of output 72 [2019-01-18 18:11:50,540 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:50,542 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:50,543 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:50,544 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:50,545 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:50,546 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:50,547 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 37 treesize of output 80 [2019-01-18 18:11:50,613 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:50,614 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:50,614 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:50,615 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:50,617 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:50,618 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:50,619 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:50,620 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:50,621 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 31 treesize of output 61 [2019-01-18 18:11:50,621 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2019-01-18 18:11:50,649 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:50,676 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:50,703 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:50,731 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:50,769 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-01-18 18:11:50,772 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2019-01-18 18:11:50,775 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2019-01-18 18:11:50,779 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 14 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2019-01-18 18:11:50,781 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 15 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2019-01-18 18:11:50,784 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 91 [2019-01-18 18:11:50,785 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2019-01-18 18:11:50,819 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:50,840 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:50,857 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:50,869 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:50,881 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:50,928 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-01-18 18:11:50,928 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 3 variables, input treesize:92, output treesize:91 [2019-01-18 18:11:50,970 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:50,971 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 41 treesize of output 97 [2019-01-18 18:11:50,971 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:11:51,013 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-01-18 18:11:51,014 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:101, output treesize:71 [2019-01-18 18:11:51,050 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:51,051 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:51,052 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:51,053 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:51,054 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:51,055 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:51,056 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:51,057 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:51,058 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 41 treesize of output 103 [2019-01-18 18:11:51,058 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:11:51,103 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 18:11:51,104 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:81, output treesize:55 [2019-01-18 18:11:51,139 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:51,140 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:51,140 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:51,142 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:51,143 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:51,144 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:51,145 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:51,146 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:51,147 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:51,148 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:51,149 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:51,150 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 18:11:51,151 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:51,152 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 43 treesize of output 118 [2019-01-18 18:11:51,152 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:11:51,203 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-18 18:11:51,204 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:67, output treesize:47 [2019-01-18 18:11:51,232 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:51,233 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:51,235 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:51,236 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:51,237 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:51,238 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:51,239 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:51,240 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:51,241 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:51,242 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:51,243 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:51,244 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:51,245 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:51,246 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 18:11:51,247 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:51,248 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 45 treesize of output 124 [2019-01-18 18:11:51,249 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:11:51,301 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. [2019-01-18 18:11:51,301 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:61, output treesize:49 [2019-01-18 18:11:51,328 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:11:51,329 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 18:11:52,162 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:11:52,181 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 18:11:52,181 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2019-01-18 18:11:52,181 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 18:11:52,181 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-01-18 18:11:52,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-01-18 18:11:52,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2019-01-18 18:11:52,182 INFO L87 Difference]: Start difference. First operand 951 states and 6492 transitions. Second operand 12 states. [2019-01-18 18:11:58,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:11:58,208 INFO L93 Difference]: Finished difference Result 1024 states and 6701 transitions. [2019-01-18 18:11:58,209 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-01-18 18:11:58,209 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 6 [2019-01-18 18:11:58,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:11:58,213 INFO L225 Difference]: With dead ends: 1024 [2019-01-18 18:11:58,213 INFO L226 Difference]: Without dead ends: 1023 [2019-01-18 18:11:58,214 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=147, Invalid=273, Unknown=0, NotChecked=0, Total=420 [2019-01-18 18:11:58,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1023 states. [2019-01-18 18:11:58,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1023 to 948. [2019-01-18 18:11:58,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 948 states. [2019-01-18 18:11:58,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 948 states to 948 states and 6467 transitions. [2019-01-18 18:11:58,597 INFO L78 Accepts]: Start accepts. Automaton has 948 states and 6467 transitions. Word has length 6 [2019-01-18 18:11:58,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:11:58,597 INFO L480 AbstractCegarLoop]: Abstraction has 948 states and 6467 transitions. [2019-01-18 18:11:58,597 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-01-18 18:11:58,597 INFO L276 IsEmpty]: Start isEmpty. Operand 948 states and 6467 transitions. [2019-01-18 18:11:58,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-01-18 18:11:58,598 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:11:58,599 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-01-18 18:11:58,599 INFO L423 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:11:58,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:11:58,599 INFO L82 PathProgramCache]: Analyzing trace with hash 908380906, now seen corresponding path program 1 times [2019-01-18 18:11:58,599 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:11:58,599 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:11:58,599 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:11:58,600 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:11:58,600 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:11:58,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:11:58,789 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:11:58,790 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:11:58,790 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 18:11:58,790 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2019-01-18 18:11:58,790 INFO L207 CegarAbsIntRunner]: [0], [14], [18], [22], [24], [27] [2019-01-18 18:11:58,791 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-18 18:11:58,791 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 18:11:59,144 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 18:11:59,144 INFO L272 AbstractInterpreter]: Visited 6 different actions 11 times. Merged at 1 different actions 1 times. Never widened. Found 8 fixpoints after 5 different actions. Largest state had 0 variables. [2019-01-18 18:11:59,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:11:59,144 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 18:11:59,144 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:11:59,144 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 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 18:11:59,153 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:11:59,153 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 18:11:59,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:11:59,158 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 18:11:59,190 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 21 treesize of output 24 [2019-01-18 18:11:59,196 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 24 treesize of output 30 [2019-01-18 18:11:59,200 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:59,202 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:59,202 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 26 treesize of output 40 [2019-01-18 18:11:59,210 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:59,212 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:59,214 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:59,214 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2019-01-18 18:11:59,222 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:59,223 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:59,225 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:59,226 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:59,227 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 30 treesize of output 72 [2019-01-18 18:11:59,234 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:59,235 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:59,235 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:59,236 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:59,237 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:59,237 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 91 [2019-01-18 18:11:59,238 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-18 18:11:59,277 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:59,299 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:59,318 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:59,333 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:59,346 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:59,380 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:59,381 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 68 treesize of output 71 [2019-01-18 18:11:59,419 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:59,420 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:59,421 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 58 treesize of output 67 [2019-01-18 18:11:59,463 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:59,464 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:59,465 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:59,465 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:59,466 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 46 treesize of output 72 [2019-01-18 18:11:59,514 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:59,515 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:59,517 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:59,518 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:59,519 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:59,520 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:59,521 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 37 treesize of output 80 [2019-01-18 18:11:59,586 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:59,587 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:59,588 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:59,589 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:59,590 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:59,591 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:59,592 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:59,594 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:59,594 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 31 treesize of output 61 [2019-01-18 18:11:59,595 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2019-01-18 18:11:59,621 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:59,646 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:59,673 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:59,700 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:59,745 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-01-18 18:11:59,745 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 3 variables, input treesize:92, output treesize:91 [2019-01-18 18:11:59,790 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:59,791 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 41 treesize of output 97 [2019-01-18 18:11:59,791 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:11:59,838 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-01-18 18:11:59,838 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:101, output treesize:71 [2019-01-18 18:11:59,875 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:59,876 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:59,877 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:59,878 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:59,878 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:59,879 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:59,880 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:59,881 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:59,882 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 41 treesize of output 103 [2019-01-18 18:11:59,883 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:11:59,931 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 18:11:59,931 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:81, output treesize:55 [2019-01-18 18:11:59,965 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:59,965 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:59,966 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:59,967 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:59,968 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:59,969 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:59,970 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:59,972 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:59,973 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:59,974 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:59,975 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:59,975 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 18:11:59,976 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:59,977 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 43 treesize of output 118 [2019-01-18 18:11:59,978 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:12:00,029 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-18 18:12:00,029 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:67, output treesize:47 [2019-01-18 18:12:00,059 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:00,060 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:00,061 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:00,062 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:00,063 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:00,065 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:00,066 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:00,067 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:00,068 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:00,069 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:00,070 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:00,071 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:00,072 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:00,073 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:00,074 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:00,074 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 18:12:00,075 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 45 treesize of output 125 [2019-01-18 18:12:00,076 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:12:00,129 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. [2019-01-18 18:12:00,129 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:61, output treesize:47 [2019-01-18 18:12:00,157 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:12:00,157 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 18:12:00,212 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:12:00,230 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 18:12:00,231 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 14 [2019-01-18 18:12:00,231 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 18:12:00,231 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-01-18 18:12:00,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-01-18 18:12:00,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2019-01-18 18:12:00,232 INFO L87 Difference]: Start difference. First operand 948 states and 6467 transitions. Second operand 12 states. [2019-01-18 18:12:01,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:12:01,541 INFO L93 Difference]: Finished difference Result 1059 states and 6958 transitions. [2019-01-18 18:12:01,541 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-01-18 18:12:01,541 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 6 [2019-01-18 18:12:01,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:12:01,547 INFO L225 Difference]: With dead ends: 1059 [2019-01-18 18:12:01,547 INFO L226 Difference]: Without dead ends: 1057 [2019-01-18 18:12:01,547 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=118, Invalid=224, Unknown=0, NotChecked=0, Total=342 [2019-01-18 18:12:01,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1057 states. [2019-01-18 18:12:01,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1057 to 945. [2019-01-18 18:12:01,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 945 states. [2019-01-18 18:12:01,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 945 states to 945 states and 6457 transitions. [2019-01-18 18:12:01,950 INFO L78 Accepts]: Start accepts. Automaton has 945 states and 6457 transitions. Word has length 6 [2019-01-18 18:12:01,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:12:01,950 INFO L480 AbstractCegarLoop]: Abstraction has 945 states and 6457 transitions. [2019-01-18 18:12:01,950 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-01-18 18:12:01,950 INFO L276 IsEmpty]: Start isEmpty. Operand 945 states and 6457 transitions. [2019-01-18 18:12:01,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-01-18 18:12:01,952 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:12:01,952 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-01-18 18:12:01,952 INFO L423 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:12:01,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:12:01,952 INFO L82 PathProgramCache]: Analyzing trace with hash 908367452, now seen corresponding path program 1 times [2019-01-18 18:12:01,952 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:12:01,953 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:12:01,953 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:12:01,953 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:12:01,953 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:12:01,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:12:02,100 WARN L181 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2019-01-18 18:12:02,139 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:12:02,140 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:12:02,140 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 18:12:02,140 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2019-01-18 18:12:02,140 INFO L207 CegarAbsIntRunner]: [0], [10], [14], [18], [22], [27] [2019-01-18 18:12:02,143 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-18 18:12:02,143 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 18:12:02,480 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 18:12:02,481 INFO L272 AbstractInterpreter]: Visited 6 different actions 11 times. Merged at 1 different actions 1 times. Never widened. Found 8 fixpoints after 5 different actions. Largest state had 0 variables. [2019-01-18 18:12:02,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:12:02,481 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 18:12:02,481 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:12:02,481 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 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 18:12:02,489 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:12:02,489 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 18:12:02,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:12:02,494 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 18:12:02,517 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 21 treesize of output 24 [2019-01-18 18:12:02,520 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 24 treesize of output 30 [2019-01-18 18:12:02,526 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:02,529 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:02,529 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 26 treesize of output 40 [2019-01-18 18:12:02,536 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:02,538 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:02,541 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:02,541 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 28 treesize of output 54 [2019-01-18 18:12:02,550 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:02,552 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:02,554 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:02,556 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:02,557 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 30 treesize of output 72 [2019-01-18 18:12:02,570 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 71 [2019-01-18 18:12:02,571 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-18 18:12:02,602 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:12:02,625 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:12:02,644 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:12:02,659 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:12:02,672 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:12:02,701 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:02,702 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 48 treesize of output 54 [2019-01-18 18:12:02,734 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:02,735 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:02,736 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 41 treesize of output 53 [2019-01-18 18:12:02,772 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:02,774 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:02,775 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:02,776 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:02,776 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 32 treesize of output 61 [2019-01-18 18:12:02,821 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:02,822 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:02,823 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:02,824 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:02,826 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:02,827 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:02,827 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 41 [2019-01-18 18:12:02,828 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-01-18 18:12:02,868 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:12:02,881 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:12:02,897 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:12:02,930 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-01-18 18:12:02,930 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 3 variables, input treesize:72, output treesize:71 [2019-01-18 18:12:02,997 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:02,998 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 72 [2019-01-18 18:12:02,999 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:12:03,029 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-01-18 18:12:03,029 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:76, output treesize:50 [2019-01-18 18:12:03,061 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:03,062 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:03,063 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:03,064 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:03,065 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:03,066 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:03,067 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:03,068 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-18 18:12:03,068 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:12:03,098 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-01-18 18:12:03,099 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:60, output treesize:38 [2019-01-18 18:12:03,125 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:03,126 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:03,127 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:03,128 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:03,130 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:03,131 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:03,132 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:03,133 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:03,134 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:03,135 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 18:12:03,136 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:03,137 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 97 [2019-01-18 18:12:03,137 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:12:03,171 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 18:12:03,171 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:50, output treesize:34 [2019-01-18 18:12:03,196 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:03,197 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:03,197 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:03,198 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:03,199 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:03,200 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:03,201 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:03,202 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:03,204 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:03,205 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:03,205 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:03,206 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:03,207 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 18:12:03,208 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 100 [2019-01-18 18:12:03,208 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:12:03,242 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-18 18:12:03,242 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:48, output treesize:38 [2019-01-18 18:12:03,262 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:12:03,262 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 18:12:03,322 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:12:03,341 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 18:12:03,341 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2019-01-18 18:12:03,341 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 18:12:03,341 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-01-18 18:12:03,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-01-18 18:12:03,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2019-01-18 18:12:03,342 INFO L87 Difference]: Start difference. First operand 945 states and 6457 transitions. Second operand 12 states. [2019-01-18 18:12:05,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:12:05,359 INFO L93 Difference]: Finished difference Result 1044 states and 6871 transitions. [2019-01-18 18:12:05,359 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-01-18 18:12:05,359 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 6 [2019-01-18 18:12:05,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:12:05,363 INFO L225 Difference]: With dead ends: 1044 [2019-01-18 18:12:05,363 INFO L226 Difference]: Without dead ends: 1042 [2019-01-18 18:12:05,364 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=147, Invalid=273, Unknown=0, NotChecked=0, Total=420 [2019-01-18 18:12:05,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1042 states. [2019-01-18 18:12:05,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1042 to 982. [2019-01-18 18:12:05,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 982 states. [2019-01-18 18:12:05,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 982 states to 982 states and 6716 transitions. [2019-01-18 18:12:05,763 INFO L78 Accepts]: Start accepts. Automaton has 982 states and 6716 transitions. Word has length 6 [2019-01-18 18:12:05,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:12:05,763 INFO L480 AbstractCegarLoop]: Abstraction has 982 states and 6716 transitions. [2019-01-18 18:12:05,764 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-01-18 18:12:05,764 INFO L276 IsEmpty]: Start isEmpty. Operand 982 states and 6716 transitions. [2019-01-18 18:12:05,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-01-18 18:12:05,765 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:12:05,765 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-01-18 18:12:05,765 INFO L423 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:12:05,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:12:05,766 INFO L82 PathProgramCache]: Analyzing trace with hash 908371606, now seen corresponding path program 2 times [2019-01-18 18:12:05,766 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:12:05,766 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:12:05,766 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:12:05,766 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:12:05,766 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:12:05,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:12:05,905 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:12:05,906 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:12:05,906 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 18:12:05,906 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-18 18:12:05,906 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-18 18:12:05,906 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:12:05,906 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 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 18:12:05,914 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-01-18 18:12:05,915 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-01-18 18:12:05,922 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-01-18 18:12:05,922 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-18 18:12:05,923 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 18:12:05,945 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:05,946 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 68 treesize of output 71 [2019-01-18 18:12:05,987 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:05,988 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:05,989 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 58 treesize of output 67 [2019-01-18 18:12:06,030 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:06,032 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:06,033 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:06,034 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:06,035 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 46 treesize of output 72 [2019-01-18 18:12:06,088 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:06,089 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:06,090 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:06,091 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:06,092 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:06,093 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:06,094 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 37 treesize of output 80 [2019-01-18 18:12:06,157 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:06,158 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:06,160 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:06,161 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:06,162 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:06,163 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:06,164 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:06,166 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:06,166 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 31 treesize of output 61 [2019-01-18 18:12:06,167 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2019-01-18 18:12:06,193 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:12:06,220 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:12:06,248 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:12:06,274 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:12:06,311 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-01-18 18:12:06,314 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2019-01-18 18:12:06,317 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2019-01-18 18:12:06,321 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 14 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2019-01-18 18:12:06,324 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 15 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2019-01-18 18:12:06,327 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 91 [2019-01-18 18:12:06,327 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2019-01-18 18:12:06,364 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:12:06,386 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:12:06,403 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:12:06,417 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:12:06,427 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:12:06,473 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-01-18 18:12:06,473 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 3 variables, input treesize:92, output treesize:91 [2019-01-18 18:12:06,518 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:06,519 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 41 treesize of output 97 [2019-01-18 18:12:06,519 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:12:06,565 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-01-18 18:12:06,565 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:101, output treesize:71 [2019-01-18 18:12:06,601 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:06,602 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:06,603 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:06,604 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:06,605 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:06,606 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:06,607 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:06,608 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:06,609 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 41 treesize of output 103 [2019-01-18 18:12:06,609 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:12:06,657 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 18:12:06,657 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:81, output treesize:55 [2019-01-18 18:12:06,688 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:06,689 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:06,690 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:06,692 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:06,693 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:06,694 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:06,695 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:06,696 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:06,698 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:06,699 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:06,700 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:06,701 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:06,702 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:06,703 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 18:12:06,703 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 43 treesize of output 123 [2019-01-18 18:12:06,704 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:12:06,756 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-18 18:12:06,756 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:67, output treesize:49 [2019-01-18 18:12:06,784 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:06,785 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:06,786 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:06,787 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:06,788 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:06,789 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:06,790 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:06,791 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:06,792 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:06,793 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:06,795 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:06,795 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:06,796 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:06,797 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 18:12:06,798 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:06,799 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 43 treesize of output 118 [2019-01-18 18:12:06,799 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:12:06,883 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. [2019-01-18 18:12:06,883 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:59, output treesize:43 [2019-01-18 18:12:07,075 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:12:07,075 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 18:12:07,136 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:12:07,155 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 18:12:07,155 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2019-01-18 18:12:07,155 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 18:12:07,155 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-01-18 18:12:07,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-01-18 18:12:07,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=178, Unknown=0, NotChecked=0, Total=272 [2019-01-18 18:12:07,156 INFO L87 Difference]: Start difference. First operand 982 states and 6716 transitions. Second operand 12 states. [2019-01-18 18:12:08,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:12:08,479 INFO L93 Difference]: Finished difference Result 1044 states and 6839 transitions. [2019-01-18 18:12:08,480 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-01-18 18:12:08,480 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 6 [2019-01-18 18:12:08,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:12:08,485 INFO L225 Difference]: With dead ends: 1044 [2019-01-18 18:12:08,485 INFO L226 Difference]: Without dead ends: 1041 [2019-01-18 18:12:08,485 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=146, Invalid=274, Unknown=0, NotChecked=0, Total=420 [2019-01-18 18:12:08,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1041 states. [2019-01-18 18:12:08,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1041 to 980. [2019-01-18 18:12:08,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 980 states. [2019-01-18 18:12:08,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 980 states to 980 states and 6702 transitions. [2019-01-18 18:12:08,907 INFO L78 Accepts]: Start accepts. Automaton has 980 states and 6702 transitions. Word has length 6 [2019-01-18 18:12:08,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:12:08,907 INFO L480 AbstractCegarLoop]: Abstraction has 980 states and 6702 transitions. [2019-01-18 18:12:08,907 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-01-18 18:12:08,907 INFO L276 IsEmpty]: Start isEmpty. Operand 980 states and 6702 transitions. [2019-01-18 18:12:08,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-01-18 18:12:08,909 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:12:08,909 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-01-18 18:12:08,909 INFO L423 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:12:08,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:12:08,909 INFO L82 PathProgramCache]: Analyzing trace with hash 908017958, now seen corresponding path program 1 times [2019-01-18 18:12:08,909 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:12:08,910 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:12:08,910 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-18 18:12:08,910 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:12:08,910 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:12:08,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:12:08,986 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:12:08,987 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:12:08,987 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 18:12:08,987 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2019-01-18 18:12:08,987 INFO L207 CegarAbsIntRunner]: [0], [6], [18], [22], [24], [27] [2019-01-18 18:12:08,988 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-18 18:12:08,988 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 18:12:09,369 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 18:12:09,369 INFO L272 AbstractInterpreter]: Visited 6 different actions 11 times. Merged at 1 different actions 1 times. Never widened. Found 8 fixpoints after 5 different actions. Largest state had 0 variables. [2019-01-18 18:12:09,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:12:09,369 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 18:12:09,369 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:12:09,369 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 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 18:12:09,377 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:12:09,377 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 18:12:09,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:12:09,382 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 18:12:09,407 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 21 treesize of output 24 [2019-01-18 18:12:09,410 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 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 30 [2019-01-18 18:12:09,417 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:09,419 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:09,419 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 26 treesize of output 40 [2019-01-18 18:12:09,426 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:09,428 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:09,430 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:09,430 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 28 treesize of output 54 [2019-01-18 18:12:09,436 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:09,438 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:09,440 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:09,442 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:09,442 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 30 treesize of output 72 [2019-01-18 18:12:09,457 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 71 [2019-01-18 18:12:09,458 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-18 18:12:09,485 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:12:09,508 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:12:09,525 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:12:09,539 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:12:09,551 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:12:09,580 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:09,581 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 48 treesize of output 54 [2019-01-18 18:12:09,612 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:09,613 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:09,614 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 41 treesize of output 53 [2019-01-18 18:12:09,648 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:09,650 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:09,651 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:09,652 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:09,652 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 32 treesize of output 61 [2019-01-18 18:12:09,696 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:09,697 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:09,698 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:09,699 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:09,701 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:09,702 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:09,702 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 41 [2019-01-18 18:12:09,703 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-01-18 18:12:09,738 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:12:09,753 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:12:09,769 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:12:09,802 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-01-18 18:12:09,802 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 4 variables, input treesize:72, output treesize:71 [2019-01-18 18:12:09,901 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:09,910 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 81 [2019-01-18 18:12:09,911 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-01-18 18:12:10,016 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 2 xjuncts. [2019-01-18 18:12:10,017 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:81, output treesize:106 [2019-01-18 18:12:10,127 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:10,129 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:10,129 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:10,130 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:10,132 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:10,137 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:10,138 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:10,138 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 18:12:10,148 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 12 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 65 treesize of output 93 [2019-01-18 18:12:10,148 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-01-18 18:12:10,300 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:10,301 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:10,303 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:10,304 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:10,305 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:10,306 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:10,306 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 18:12:10,307 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 80 [2019-01-18 18:12:10,308 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-01-18 18:12:10,396 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 8 dim-0 vars, and 3 xjuncts. [2019-01-18 18:12:10,396 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 7 variables, input treesize:126, output treesize:135 [2019-01-18 18:12:10,515 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:10,517 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:10,518 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:10,519 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:10,520 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:10,521 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:10,525 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:10,526 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:10,528 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:10,529 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:10,530 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:10,539 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 57 treesize of output 95 [2019-01-18 18:12:10,540 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-01-18 18:12:10,710 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:10,711 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:10,713 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:10,714 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:10,715 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:10,716 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:10,717 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:10,718 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:10,719 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:10,719 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 93 [2019-01-18 18:12:10,720 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-01-18 18:12:10,838 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:10,839 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:10,839 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:10,840 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:10,841 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:10,842 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:10,843 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:10,844 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:10,845 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:10,846 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 86 [2019-01-18 18:12:10,846 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-01-18 18:12:10,943 INFO L267 ElimStorePlain]: Start of recursive call 1: 11 dim-0 vars, 3 dim-1 vars, End of recursive call: 14 dim-0 vars, and 4 xjuncts. [2019-01-18 18:12:10,944 INFO L202 ElimStorePlain]: Needed 4 recursive calls to eliminate 14 variables, input treesize:165, output treesize:147 [2019-01-18 18:12:11,071 WARN L181 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2019-01-18 18:12:11,077 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:11,079 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:11,080 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:11,081 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:11,082 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:11,083 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:11,084 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:11,086 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:11,087 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:11,088 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:11,089 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:11,090 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:11,091 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:11,092 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:11,093 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 16 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 102 [2019-01-18 18:12:11,094 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:12:11,214 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:11,216 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:11,217 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:11,218 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:11,219 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:11,220 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:11,222 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:11,223 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:11,224 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:11,228 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:11,229 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:11,233 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:11,234 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:11,234 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 18:12:11,235 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:11,252 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 4 case distinctions, treesize of input 51 treesize of output 118 [2019-01-18 18:12:11,254 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 4 xjuncts. [2019-01-18 18:12:11,514 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:11,515 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:11,516 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:11,517 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:11,518 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:11,520 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:11,521 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:11,522 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:11,523 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:11,524 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:11,525 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:11,526 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:11,527 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 18:12:11,528 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 92 [2019-01-18 18:12:11,528 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-01-18 18:12:11,681 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:11,682 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:11,683 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:11,685 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:11,686 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:11,687 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:11,688 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:11,689 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:11,690 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:11,691 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:11,693 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:11,694 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:11,694 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 18:12:11,695 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 98 [2019-01-18 18:12:11,696 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2019-01-18 18:12:11,831 INFO L267 ElimStorePlain]: Start of recursive call 1: 17 dim-0 vars, 4 dim-1 vars, End of recursive call: 25 dim-0 vars, and 6 xjuncts. [2019-01-18 18:12:11,831 INFO L202 ElimStorePlain]: Needed 5 recursive calls to eliminate 21 variables, input treesize:190, output treesize:230 [2019-01-18 18:12:12,039 WARN L181 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 103 [2019-01-18 18:12:12,041 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:12:12,042 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 18:12:12,141 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:12:12,160 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 18:12:12,161 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2019-01-18 18:12:12,161 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 18:12:12,161 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-01-18 18:12:12,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-01-18 18:12:12,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=187, Unknown=0, NotChecked=0, Total=272 [2019-01-18 18:12:12,161 INFO L87 Difference]: Start difference. First operand 980 states and 6702 transitions. Second operand 12 states. [2019-01-18 18:12:12,350 WARN L181 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 46 [2019-01-18 18:12:12,626 WARN L181 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 65 [2019-01-18 18:12:13,051 WARN L181 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 54 [2019-01-18 18:12:13,493 WARN L181 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 75 [2019-01-18 18:12:24,074 WARN L181 SmtUtils]: Spent 10.25 s on a formula simplification. DAG size of input: 116 DAG size of output: 85 [2019-01-18 18:12:25,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:12:25,002 INFO L93 Difference]: Finished difference Result 1104 states and 7131 transitions. [2019-01-18 18:12:25,003 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-01-18 18:12:25,003 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 6 [2019-01-18 18:12:25,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:12:25,007 INFO L225 Difference]: With dead ends: 1104 [2019-01-18 18:12:25,007 INFO L226 Difference]: Without dead ends: 1102 [2019-01-18 18:12:25,007 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 11.9s TimeCoverageRelationStatistics Valid=148, Invalid=358, Unknown=0, NotChecked=0, Total=506 [2019-01-18 18:12:25,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1102 states. [2019-01-18 18:12:25,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1102 to 984. [2019-01-18 18:12:25,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 984 states. [2019-01-18 18:12:25,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 984 states to 984 states and 6730 transitions. [2019-01-18 18:12:25,417 INFO L78 Accepts]: Start accepts. Automaton has 984 states and 6730 transitions. Word has length 6 [2019-01-18 18:12:25,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:12:25,417 INFO L480 AbstractCegarLoop]: Abstraction has 984 states and 6730 transitions. [2019-01-18 18:12:25,417 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-01-18 18:12:25,417 INFO L276 IsEmpty]: Start isEmpty. Operand 984 states and 6730 transitions. [2019-01-18 18:12:25,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-01-18 18:12:25,419 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:12:25,419 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-01-18 18:12:25,419 INFO L423 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:12:25,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:12:25,419 INFO L82 PathProgramCache]: Analyzing trace with hash 908017524, now seen corresponding path program 1 times [2019-01-18 18:12:25,419 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:12:25,420 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:12:25,420 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:12:25,420 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:12:25,420 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:12:25,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:12:25,538 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:12:25,538 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:12:25,538 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 18:12:25,538 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2019-01-18 18:12:25,538 INFO L207 CegarAbsIntRunner]: [0], [6], [10], [18], [22], [27] [2019-01-18 18:12:25,539 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-18 18:12:25,539 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 18:12:25,889 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 18:12:25,889 INFO L272 AbstractInterpreter]: Visited 6 different actions 11 times. Merged at 1 different actions 1 times. Never widened. Found 8 fixpoints after 5 different actions. Largest state had 0 variables. [2019-01-18 18:12:25,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:12:25,889 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 18:12:25,889 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:12:25,890 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 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 18:12:25,897 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:12:25,897 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 18:12:25,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:12:25,903 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 18:12:25,930 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:25,931 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 48 treesize of output 54 [2019-01-18 18:12:25,972 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:25,979 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:25,979 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 41 treesize of output 53 [2019-01-18 18:12:26,012 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:26,014 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:26,016 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:26,018 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:26,018 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 32 treesize of output 61 [2019-01-18 18:12:26,062 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:26,063 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:26,065 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:26,067 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:26,069 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:26,070 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:26,070 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 41 [2019-01-18 18:12:26,070 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2019-01-18 18:12:26,092 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:12:26,115 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:12:26,139 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:12:26,169 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-01-18 18:12:26,171 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2019-01-18 18:12:26,174 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2019-01-18 18:12:26,177 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2019-01-18 18:12:26,180 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 30 treesize of output 72 [2019-01-18 18:12:26,188 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 71 [2019-01-18 18:12:26,189 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-01-18 18:12:26,215 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:12:26,236 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:12:26,251 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:12:26,263 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:12:26,275 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:12:26,307 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-01-18 18:12:26,308 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 4 variables, input treesize:72, output treesize:71 [2019-01-18 18:12:26,362 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:26,363 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 72 [2019-01-18 18:12:26,363 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:12:26,391 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-01-18 18:12:26,391 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:76, output treesize:50 [2019-01-18 18:12:26,415 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:26,416 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:26,417 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:26,417 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:26,418 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:26,419 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:26,419 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 18:12:26,420 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 80 [2019-01-18 18:12:26,421 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:12:26,451 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-01-18 18:12:26,452 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:60, output treesize:42 [2019-01-18 18:12:26,478 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:26,479 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:26,479 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:26,480 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:26,481 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:26,482 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:26,484 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:26,485 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:26,486 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:26,486 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-18 18:12:26,487 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:12:26,516 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 18:12:26,517 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:52, output treesize:34 [2019-01-18 18:12:26,541 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:26,543 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:26,544 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:26,545 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:26,546 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:26,548 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:26,549 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:26,550 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:26,551 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:26,552 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:26,553 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 18:12:26,554 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:26,555 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 93 [2019-01-18 18:12:26,555 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:12:26,590 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-18 18:12:26,590 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:46, output treesize:34 [2019-01-18 18:12:26,613 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:12:26,613 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 18:12:26,662 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:12:26,682 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 18:12:26,682 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 14 [2019-01-18 18:12:26,682 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 18:12:26,682 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-01-18 18:12:26,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-01-18 18:12:26,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2019-01-18 18:12:26,683 INFO L87 Difference]: Start difference. First operand 984 states and 6730 transitions. Second operand 12 states. [2019-01-18 18:12:29,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:12:29,086 INFO L93 Difference]: Finished difference Result 1313 states and 8698 transitions. [2019-01-18 18:12:29,086 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-01-18 18:12:29,086 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 6 [2019-01-18 18:12:29,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:12:29,092 INFO L225 Difference]: With dead ends: 1313 [2019-01-18 18:12:29,092 INFO L226 Difference]: Without dead ends: 1312 [2019-01-18 18:12:29,092 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=127, Invalid=215, Unknown=0, NotChecked=0, Total=342 [2019-01-18 18:12:29,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1312 states. [2019-01-18 18:12:29,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1312 to 839. [2019-01-18 18:12:29,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 839 states. [2019-01-18 18:12:29,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 839 states to 839 states and 5721 transitions. [2019-01-18 18:12:29,502 INFO L78 Accepts]: Start accepts. Automaton has 839 states and 5721 transitions. Word has length 6 [2019-01-18 18:12:29,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:12:29,502 INFO L480 AbstractCegarLoop]: Abstraction has 839 states and 5721 transitions. [2019-01-18 18:12:29,502 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-01-18 18:12:29,502 INFO L276 IsEmpty]: Start isEmpty. Operand 839 states and 5721 transitions. [2019-01-18 18:12:29,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-01-18 18:12:29,504 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:12:29,504 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-01-18 18:12:29,504 INFO L423 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:12:29,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:12:29,504 INFO L82 PathProgramCache]: Analyzing trace with hash 908550478, now seen corresponding path program 1 times [2019-01-18 18:12:29,504 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:12:29,505 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:12:29,505 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:12:29,505 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:12:29,505 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:12:29,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:12:29,569 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:12:29,569 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:12:29,569 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 18:12:29,569 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2019-01-18 18:12:29,569 INFO L207 CegarAbsIntRunner]: [0], [14], [22], [24], [28], [29] [2019-01-18 18:12:29,570 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-18 18:12:29,570 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 18:12:29,861 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 18:12:29,862 INFO L272 AbstractInterpreter]: Visited 6 different actions 10 times. Merged at 1 different actions 1 times. Never widened. Found 6 fixpoints after 4 different actions. Largest state had 0 variables. [2019-01-18 18:12:29,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:12:29,862 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 18:12:29,862 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:12:29,862 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 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 18:12:29,870 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:12:29,870 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 18:12:29,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:12:29,875 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 18:12:29,880 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 21 treesize of output 24 [2019-01-18 18:12:29,884 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 24 treesize of output 26 [2019-01-18 18:12:29,893 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:29,895 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:29,895 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 26 treesize of output 36 [2019-01-18 18:12:29,904 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:29,906 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:29,908 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:29,908 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 28 treesize of output 50 [2019-01-18 18:12:29,915 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:29,919 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:29,922 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:29,924 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:29,924 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 68 [2019-01-18 18:12:29,930 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:29,932 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:29,936 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:29,938 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:29,939 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:29,940 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 14 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 87 [2019-01-18 18:12:29,941 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-18 18:12:30,420 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:12:30,441 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:12:30,458 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:12:30,471 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:12:30,485 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:12:30,515 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 63 treesize of output 56 [2019-01-18 18:12:30,530 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:30,532 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:30,533 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 53 treesize of output 63 [2019-01-18 18:12:30,572 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:30,573 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:30,576 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:30,577 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:30,577 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 46 treesize of output 68 [2019-01-18 18:12:30,624 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:30,625 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:30,626 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:30,627 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:30,629 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:30,631 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:30,631 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 76 [2019-01-18 18:12:30,690 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:30,691 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:30,692 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:30,693 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:30,694 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:30,695 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:30,697 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:30,698 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:30,699 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2019-01-18 18:12:30,700 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2019-01-18 18:12:30,722 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:12:30,746 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:12:30,769 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:12:30,796 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:12:30,838 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-01-18 18:12:30,838 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 4 variables, input treesize:84, output treesize:87 [2019-01-18 18:12:30,875 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:30,876 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 93 [2019-01-18 18:12:30,876 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:12:30,919 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 18:12:30,919 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:97, output treesize:67 [2019-01-18 18:12:30,947 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:30,947 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:30,948 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:30,949 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:30,951 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:30,953 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:30,954 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:30,955 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:30,956 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 41 treesize of output 107 [2019-01-18 18:12:30,957 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:12:31,003 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-18 18:12:31,003 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:77, output treesize:51 [2019-01-18 18:12:31,027 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:31,028 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:31,029 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:31,029 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:31,031 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:31,032 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:31,033 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:31,034 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:31,035 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:31,037 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:31,038 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:31,039 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:31,040 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:31,041 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 18:12:31,041 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 43 treesize of output 119 [2019-01-18 18:12:31,042 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:12:31,088 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. [2019-01-18 18:12:31,088 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:63, output treesize:45 [2019-01-18 18:12:31,114 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:12:31,114 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 18:12:31,172 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:12:31,190 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 18:12:31,191 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2019-01-18 18:12:31,191 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 18:12:31,191 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-01-18 18:12:31,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-01-18 18:12:31,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2019-01-18 18:12:31,191 INFO L87 Difference]: Start difference. First operand 839 states and 5721 transitions. Second operand 10 states. [2019-01-18 18:12:32,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:12:32,184 INFO L93 Difference]: Finished difference Result 881 states and 5780 transitions. [2019-01-18 18:12:32,185 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-01-18 18:12:32,185 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 6 [2019-01-18 18:12:32,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:12:32,187 INFO L225 Difference]: With dead ends: 881 [2019-01-18 18:12:32,187 INFO L226 Difference]: Without dead ends: 880 [2019-01-18 18:12:32,188 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=99, Invalid=173, Unknown=0, NotChecked=0, Total=272 [2019-01-18 18:12:32,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 880 states. [2019-01-18 18:12:32,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 880 to 841. [2019-01-18 18:12:32,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 841 states. [2019-01-18 18:12:32,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 841 states to 841 states and 5735 transitions. [2019-01-18 18:12:32,609 INFO L78 Accepts]: Start accepts. Automaton has 841 states and 5735 transitions. Word has length 6 [2019-01-18 18:12:32,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:12:32,609 INFO L480 AbstractCegarLoop]: Abstraction has 841 states and 5735 transitions. [2019-01-18 18:12:32,609 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-01-18 18:12:32,609 INFO L276 IsEmpty]: Start isEmpty. Operand 841 states and 5735 transitions. [2019-01-18 18:12:32,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-01-18 18:12:32,610 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:12:32,610 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-01-18 18:12:32,610 INFO L423 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:12:32,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:12:32,611 INFO L82 PathProgramCache]: Analyzing trace with hash 908133404, now seen corresponding path program 1 times [2019-01-18 18:12:32,611 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:12:32,611 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:12:32,611 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:12:32,611 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:12:32,611 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:12:32,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:12:32,730 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:12:32,730 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:12:32,730 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 18:12:32,730 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2019-01-18 18:12:32,731 INFO L207 CegarAbsIntRunner]: [0], [10], [14], [22], [28], [29] [2019-01-18 18:12:32,731 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-18 18:12:32,731 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 18:12:33,004 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 18:12:33,004 INFO L272 AbstractInterpreter]: Visited 6 different actions 10 times. Merged at 1 different actions 1 times. Never widened. Found 6 fixpoints after 4 different actions. Largest state had 0 variables. [2019-01-18 18:12:33,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:12:33,004 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 18:12:33,004 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:12:33,004 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 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 18:12:33,012 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:12:33,012 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 18:12:33,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:12:33,016 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 18:12:33,023 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 21 treesize of output 24 [2019-01-18 18:12:33,027 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 24 treesize of output 26 [2019-01-18 18:12:33,035 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:33,037 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:33,037 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 26 treesize of output 36 [2019-01-18 18:12:33,049 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:33,051 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:33,053 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:33,053 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 28 treesize of output 50 [2019-01-18 18:12:33,056 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:33,059 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:33,060 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:33,061 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:33,061 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 68 [2019-01-18 18:12:33,071 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 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 32 treesize of output 67 [2019-01-18 18:12:33,072 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-18 18:12:33,101 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:12:33,121 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:12:33,137 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:12:33,151 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:12:33,164 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:12:33,187 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 43 treesize of output 39 [2019-01-18 18:12:33,201 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:33,204 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:33,204 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 36 treesize of output 49 [2019-01-18 18:12:33,235 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:33,236 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:33,238 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:33,239 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:33,240 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 32 treesize of output 57 [2019-01-18 18:12:33,279 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:33,281 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:33,282 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:33,283 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:33,284 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:33,286 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:33,287 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 37 [2019-01-18 18:12:33,287 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-01-18 18:12:33,301 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:12:33,316 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:12:33,332 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:12:33,363 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 18:12:33,364 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 5 variables, input treesize:64, output treesize:67 [2019-01-18 18:12:33,449 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:33,450 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 68 [2019-01-18 18:12:33,450 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:12:33,477 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 18:12:33,478 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:72, output treesize:46 [2019-01-18 18:12:33,497 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:33,497 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:33,498 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:33,499 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:33,502 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:33,503 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:33,504 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:33,513 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 0 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 86 [2019-01-18 18:12:33,514 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-01-18 18:12:33,626 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 2 xjuncts. [2019-01-18 18:12:33,626 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:56, output treesize:72 [2019-01-18 18:12:33,665 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:33,666 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:33,667 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:33,667 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:33,668 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:33,669 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:33,670 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:33,671 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:33,672 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 18:12:33,672 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 77 [2019-01-18 18:12:33,673 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:12:33,694 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 18:12:33,694 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:41, output treesize:27 [2019-01-18 18:12:33,710 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:12:33,710 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 18:12:33,733 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:12:33,752 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 18:12:33,752 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2019-01-18 18:12:33,752 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 18:12:33,752 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-01-18 18:12:33,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-01-18 18:12:33,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2019-01-18 18:12:33,753 INFO L87 Difference]: Start difference. First operand 841 states and 5735 transitions. Second operand 10 states. [2019-01-18 18:12:35,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:12:35,015 INFO L93 Difference]: Finished difference Result 1415 states and 9444 transitions. [2019-01-18 18:12:35,015 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-01-18 18:12:35,015 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 6 [2019-01-18 18:12:35,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:12:35,020 INFO L225 Difference]: With dead ends: 1415 [2019-01-18 18:12:35,020 INFO L226 Difference]: Without dead ends: 1413 [2019-01-18 18:12:35,020 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=72, Invalid=110, Unknown=0, NotChecked=0, Total=182 [2019-01-18 18:12:35,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1413 states. [2019-01-18 18:12:35,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1413 to 1280. [2019-01-18 18:12:35,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1280 states. [2019-01-18 18:12:35,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1280 states to 1280 states and 8838 transitions. [2019-01-18 18:12:35,693 INFO L78 Accepts]: Start accepts. Automaton has 1280 states and 8838 transitions. Word has length 6 [2019-01-18 18:12:35,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:12:35,694 INFO L480 AbstractCegarLoop]: Abstraction has 1280 states and 8838 transitions. [2019-01-18 18:12:35,694 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-01-18 18:12:35,694 INFO L276 IsEmpty]: Start isEmpty. Operand 1280 states and 8838 transitions. [2019-01-18 18:12:35,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-01-18 18:12:35,696 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:12:35,696 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-01-18 18:12:35,696 INFO L423 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:12:35,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:12:35,697 INFO L82 PathProgramCache]: Analyzing trace with hash 909988134, now seen corresponding path program 1 times [2019-01-18 18:12:35,697 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:12:35,697 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:12:35,697 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:12:35,697 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:12:35,697 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:12:35,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:12:35,768 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:12:35,769 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:12:35,769 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 18:12:35,769 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2019-01-18 18:12:35,769 INFO L207 CegarAbsIntRunner]: [0], [10], [22], [24], [28], [29] [2019-01-18 18:12:35,769 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-18 18:12:35,770 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 18:12:36,100 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 18:12:36,100 INFO L272 AbstractInterpreter]: Visited 6 different actions 10 times. Merged at 1 different actions 1 times. Never widened. Found 6 fixpoints after 4 different actions. Largest state had 0 variables. [2019-01-18 18:12:36,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:12:36,101 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 18:12:36,101 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:12:36,101 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 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 18:12:36,108 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:12:36,108 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 18:12:36,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:12:36,114 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 18:12:36,118 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 43 treesize of output 39 [2019-01-18 18:12:36,139 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:36,143 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:36,144 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 36 treesize of output 49 [2019-01-18 18:12:36,226 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:36,227 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:36,229 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:36,230 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:36,231 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 32 treesize of output 57 [2019-01-18 18:12:36,269 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:36,270 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:36,272 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:36,273 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:36,274 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:36,276 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:36,277 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 37 [2019-01-18 18:12:36,277 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2019-01-18 18:12:36,293 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:12:36,307 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:12:36,324 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:12:36,346 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-01-18 18:12:36,351 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2019-01-18 18:12:36,356 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 36 [2019-01-18 18:12:36,360 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 9 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 50 [2019-01-18 18:12:36,364 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 68 [2019-01-18 18:12:36,373 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 67 [2019-01-18 18:12:36,373 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-01-18 18:12:36,396 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:12:36,414 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:12:36,428 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:12:36,440 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:12:36,452 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:12:36,481 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 18:12:36,482 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 5 variables, input treesize:64, output treesize:67 [2019-01-18 18:12:36,691 WARN L181 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2019-01-18 18:12:36,710 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:36,749 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 10 case distinctions, treesize of input 41 treesize of output 87 [2019-01-18 18:12:36,756 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 32 xjuncts. [2019-01-18 18:12:37,147 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 21 dim-0 vars, and 7 xjuncts. [2019-01-18 18:12:37,148 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:77, output treesize:349 [2019-01-18 18:12:37,260 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:37,260 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:37,263 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:37,265 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:37,266 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:37,267 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:37,267 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 18:12:37,276 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 58 treesize of output 99 [2019-01-18 18:12:37,278 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-01-18 18:12:37,457 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:37,459 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:37,460 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:37,461 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:37,464 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:37,464 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 18:12:37,473 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 58 treesize of output 93 [2019-01-18 18:12:37,474 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2019-01-18 18:12:37,645 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:37,646 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:37,647 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:37,648 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:37,649 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:37,650 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:37,651 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 61 [2019-01-18 18:12:37,652 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-01-18 18:12:37,761 INFO L267 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 3 dim-1 vars, End of recursive call: 12 dim-0 vars, and 5 xjuncts. [2019-01-18 18:12:37,761 INFO L202 ElimStorePlain]: Needed 4 recursive calls to eliminate 11 variables, input treesize:162, output treesize:180 [2019-01-18 18:12:37,882 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:37,883 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:37,884 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:37,885 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:37,886 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:37,887 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:37,888 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 75 [2019-01-18 18:12:37,888 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:12:37,955 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:37,956 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:37,958 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:37,959 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:37,960 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:37,961 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:37,962 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:37,962 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 61 [2019-01-18 18:12:37,963 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-01-18 18:12:38,018 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:38,019 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:38,020 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:38,021 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:38,022 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:38,023 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 18:12:38,023 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 61 [2019-01-18 18:12:38,024 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-01-18 18:12:38,072 INFO L267 ElimStorePlain]: Start of recursive call 1: 9 dim-0 vars, 3 dim-1 vars, End of recursive call: 9 dim-0 vars, and 3 xjuncts. [2019-01-18 18:12:38,072 INFO L202 ElimStorePlain]: Needed 4 recursive calls to eliminate 12 variables, input treesize:132, output treesize:92 [2019-01-18 18:12:38,130 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:12:38,130 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 18:12:38,175 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:12:38,193 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 18:12:38,193 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2019-01-18 18:12:38,193 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 18:12:38,194 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-01-18 18:12:38,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-01-18 18:12:38,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=113, Unknown=0, NotChecked=0, Total=182 [2019-01-18 18:12:38,194 INFO L87 Difference]: Start difference. First operand 1280 states and 8838 transitions. Second operand 10 states. [2019-01-18 18:12:38,571 WARN L181 SmtUtils]: Spent 363.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 44 [2019-01-18 18:12:46,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:12:46,910 INFO L93 Difference]: Finished difference Result 1381 states and 9127 transitions. [2019-01-18 18:12:46,910 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-01-18 18:12:46,910 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 6 [2019-01-18 18:12:46,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:12:46,916 INFO L225 Difference]: With dead ends: 1381 [2019-01-18 18:12:46,916 INFO L226 Difference]: Without dead ends: 1379 [2019-01-18 18:12:46,916 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=107, Invalid=199, Unknown=0, NotChecked=0, Total=306 [2019-01-18 18:12:46,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1379 states. [2019-01-18 18:12:47,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1379 to 1274. [2019-01-18 18:12:47,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1274 states. [2019-01-18 18:12:47,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1274 states to 1274 states and 8796 transitions. [2019-01-18 18:12:47,639 INFO L78 Accepts]: Start accepts. Automaton has 1274 states and 8796 transitions. Word has length 6 [2019-01-18 18:12:47,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:12:47,639 INFO L480 AbstractCegarLoop]: Abstraction has 1274 states and 8796 transitions. [2019-01-18 18:12:47,639 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-01-18 18:12:47,639 INFO L276 IsEmpty]: Start isEmpty. Operand 1274 states and 8796 transitions. [2019-01-18 18:12:47,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-01-18 18:12:47,641 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:12:47,641 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-01-18 18:12:47,641 INFO L423 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:12:47,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:12:47,642 INFO L82 PathProgramCache]: Analyzing trace with hash 909993964, now seen corresponding path program 1 times [2019-01-18 18:12:47,642 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:12:47,642 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:12:47,642 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:12:47,642 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:12:47,642 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:12:47,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:12:47,693 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-01-18 18:12:47,693 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:12:47,694 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 18:12:47,694 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2019-01-18 18:12:47,694 INFO L207 CegarAbsIntRunner]: [0], [10], [24], [28], [30], [31] [2019-01-18 18:12:47,694 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-18 18:12:47,695 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 18:12:48,214 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 18:12:48,214 INFO L272 AbstractInterpreter]: Visited 6 different actions 12 times. Merged at 2 different actions 2 times. Never widened. Found 6 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-18 18:12:48,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:12:48,215 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 18:12:48,215 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:12:48,215 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 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 18:12:48,224 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:12:48,224 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 18:12:48,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:12:48,229 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 18:12:48,232 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 63 treesize of output 56 [2019-01-18 18:12:48,256 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:48,262 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:48,262 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 53 treesize of output 63 [2019-01-18 18:12:48,307 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:48,308 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:48,311 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:48,312 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:48,313 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 46 treesize of output 68 [2019-01-18 18:12:48,364 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:48,365 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:48,366 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:48,367 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:48,368 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:48,370 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:48,371 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 76 [2019-01-18 18:12:48,435 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:48,435 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:48,436 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:48,437 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:48,438 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:48,439 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:48,440 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:48,442 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:48,443 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2019-01-18 18:12:48,443 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2019-01-18 18:12:48,469 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:12:48,494 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:12:48,520 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:12:48,548 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:12:48,580 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-01-18 18:12:48,605 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 8 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2019-01-18 18:12:48,608 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 11 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 36 [2019-01-18 18:12:48,612 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 13 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 50 [2019-01-18 18:12:48,616 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 14 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 68 [2019-01-18 18:12:48,621 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 14 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 87 [2019-01-18 18:12:48,621 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2019-01-18 18:12:48,654 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:12:48,674 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:12:48,689 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:12:48,701 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:12:48,713 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:12:48,756 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 18:12:48,757 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 5 variables, input treesize:84, output treesize:87 [2019-01-18 18:12:48,782 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:48,783 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 93 [2019-01-18 18:12:48,783 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:12:48,827 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-18 18:12:48,828 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:97, output treesize:67 [2019-01-18 18:12:48,850 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:48,851 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:48,853 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:48,854 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:48,855 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:48,858 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:48,859 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:48,859 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 18:12:48,869 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 112 [2019-01-18 18:12:48,870 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-01-18 18:12:49,016 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. [2019-01-18 18:12:49,017 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:79, output treesize:110 [2019-01-18 18:12:50,730 WARN L194 Executor]: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000) stderr output: (error "out of memory") [2019-01-18 18:12:50,931 WARN L521 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 74 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 18:12:50,932 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:2024 -smt2 -in -t:2000)Received EOF on stdin. stderr output: (error "out of memory") at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:208) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseCheckSatResult(Executor.java:225) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.checkSat(Scriptor.java:155) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.WrapperScript.checkSat(WrapperScript.java:116) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.WrapperScript.checkSat(WrapperScript.java:116) at de.uni_freiburg.informatik.ultimate.logic.Util.checkSat(Util.java:61) at de.uni_freiburg.informatik.ultimate.logic.simplification.SimplifyDDA.getRedundancy(SimplifyDDA.java:626) 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) ... 45 more [2019-01-18 18:12:50,937 INFO L168 Benchmark]: Toolchain (without parser) took 232737.60 ms. Allocated memory was 132.6 MB in the beginning and 1.2 GB in the end (delta: 1.0 GB). Free memory was 107.9 MB in the beginning and 209.5 MB in the end (delta: -101.7 MB). Peak memory consumption was 917.0 MB. Max. memory is 7.1 GB. [2019-01-18 18:12:50,938 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.19 ms. Allocated memory is still 132.6 MB. Free memory is still 109.2 MB. There was no memory consumed. Max. memory is 7.1 GB. [2019-01-18 18:12:50,938 INFO L168 Benchmark]: Boogie Procedure Inliner took 63.13 ms. Allocated memory is still 132.6 MB. Free memory was 107.7 MB in the beginning and 105.4 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.3 MB. Max. memory is 7.1 GB. [2019-01-18 18:12:50,938 INFO L168 Benchmark]: Boogie Preprocessor took 33.08 ms. Allocated memory is still 132.6 MB. Free memory was 105.4 MB in the beginning and 104.2 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.2 MB. Max. memory is 7.1 GB. [2019-01-18 18:12:50,939 INFO L168 Benchmark]: RCFGBuilder took 336.60 ms. Allocated memory is still 132.6 MB. Free memory was 104.2 MB in the beginning and 92.5 MB in the end (delta: 11.7 MB). Peak memory consumption was 11.7 MB. Max. memory is 7.1 GB. [2019-01-18 18:12:50,939 INFO L168 Benchmark]: TraceAbstraction took 232301.14 ms. Allocated memory was 132.6 MB in the beginning and 1.2 GB in the end (delta: 1.0 GB). Free memory was 92.3 MB in the beginning and 209.5 MB in the end (delta: -117.3 MB). Peak memory consumption was 901.4 MB. Max. memory is 7.1 GB. [2019-01-18 18:12:50,941 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 0.19 ms. Allocated memory is still 132.6 MB. Free memory is still 109.2 MB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 63.13 ms. Allocated memory is still 132.6 MB. Free memory was 107.7 MB in the beginning and 105.4 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 33.08 ms. Allocated memory is still 132.6 MB. Free memory was 105.4 MB in the beginning and 104.2 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 336.60 ms. Allocated memory is still 132.6 MB. Free memory was 104.2 MB in the beginning and 92.5 MB in the end (delta: 11.7 MB). Peak memory consumption was 11.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 232301.14 ms. Allocated memory was 132.6 MB in the beginning and 1.2 GB in the end (delta: 1.0 GB). Free memory was 92.3 MB in the beginning and 209.5 MB in the end (delta: -117.3 MB). Peak memory consumption was 901.4 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:2024 -smt2 -in -t:2000)Received EOF on stdin. stderr output: (error "out of memory") de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000)Received EOF on stdin. stderr output: (error "out of memory") : 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...