java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -s ../../../trunk/examples/settings/ai/array-bench/reach_32bit_compound_exp_cong.epf -i ../../../trunk/examples/programs/heapseparator/speedup-poc-dd-8-unlimited.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.24-b7bd044-m [2019-01-20 10:10:14,564 INFO L170 SettingsManager]: Resetting all preferences to default values... [2019-01-20 10:10:14,566 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2019-01-20 10:10:14,581 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-01-20 10:10:14,581 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-01-20 10:10:14,582 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-01-20 10:10:14,585 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-01-20 10:10:14,587 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2019-01-20 10:10:14,589 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-01-20 10:10:14,590 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-01-20 10:10:14,591 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-01-20 10:10:14,591 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-01-20 10:10:14,593 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-01-20 10:10:14,594 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-01-20 10:10:14,601 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-01-20 10:10:14,602 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-01-20 10:10:14,603 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-01-20 10:10:14,607 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-01-20 10:10:14,612 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2019-01-20 10:10:14,613 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-01-20 10:10:14,615 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-01-20 10:10:14,616 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-01-20 10:10:14,618 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-01-20 10:10:14,618 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-01-20 10:10:14,619 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-01-20 10:10:14,622 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-01-20 10:10:14,623 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-01-20 10:10:14,624 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-01-20 10:10:14,625 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2019-01-20 10:10:14,626 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-01-20 10:10:14,627 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2019-01-20 10:10:14,628 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-01-20 10:10:14,628 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-01-20 10:10:14,628 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2019-01-20 10:10:14,629 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2019-01-20 10:10:14,630 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2019-01-20 10:10:14,630 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/array-bench/reach_32bit_compound_exp_cong.epf [2019-01-20 10:10:14,646 INFO L110 SettingsManager]: Loading preferences was successful [2019-01-20 10:10:14,647 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2019-01-20 10:10:14,651 INFO L131 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2019-01-20 10:10:14,651 INFO L133 SettingsManager]: * Show backtranslation warnings=false [2019-01-20 10:10:14,651 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-01-20 10:10:14,652 INFO L133 SettingsManager]: * User list type=DISABLED [2019-01-20 10:10:14,652 INFO L133 SettingsManager]: * Inline calls to unimplemented procedures=true [2019-01-20 10:10:14,652 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-01-20 10:10:14,652 INFO L133 SettingsManager]: * Explicit value domain=true [2019-01-20 10:10:14,652 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-01-20 10:10:14,653 INFO L133 SettingsManager]: * Octagon Domain=false [2019-01-20 10:10:14,653 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2019-01-20 10:10:14,653 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-01-20 10:10:14,653 INFO L133 SettingsManager]: * Interval Domain=false [2019-01-20 10:10:14,657 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-01-20 10:10:14,657 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2019-01-20 10:10:14,658 INFO L133 SettingsManager]: * Use SBE=true [2019-01-20 10:10:14,658 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-01-20 10:10:14,658 INFO L133 SettingsManager]: * sizeof long=4 [2019-01-20 10:10:14,658 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2019-01-20 10:10:14,658 INFO L133 SettingsManager]: * sizeof POINTER=4 [2019-01-20 10:10:14,659 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2019-01-20 10:10:14,659 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-01-20 10:10:14,659 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-01-20 10:10:14,659 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-01-20 10:10:14,659 INFO L133 SettingsManager]: * sizeof long double=12 [2019-01-20 10:10:14,659 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2019-01-20 10:10:14,660 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-01-20 10:10:14,661 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-01-20 10:10:14,661 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-01-20 10:10:14,662 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2019-01-20 10:10:14,662 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-01-20 10:10:14,662 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-01-20 10:10:14,662 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-01-20 10:10:14,662 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-01-20 10:10:14,663 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-01-20 10:10:14,665 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-01-20 10:10:14,665 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-01-20 10:10:14,665 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-01-20 10:10:14,666 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-01-20 10:10:14,713 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-01-20 10:10:14,724 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-01-20 10:10:14,727 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-01-20 10:10:14,729 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2019-01-20 10:10:14,729 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2019-01-20 10:10:14,730 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/heapseparator/speedup-poc-dd-8-unlimited.bpl [2019-01-20 10:10:14,730 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/heapseparator/speedup-poc-dd-8-unlimited.bpl' [2019-01-20 10:10:14,782 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-01-20 10:10:14,784 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-01-20 10:10:14,785 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-01-20 10:10:14,785 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-01-20 10:10:14,785 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2019-01-20 10:10:14,800 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "speedup-poc-dd-8-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 20.01 10:10:14" (1/1) ... [2019-01-20 10:10:14,812 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "speedup-poc-dd-8-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 20.01 10:10:14" (1/1) ... [2019-01-20 10:10:14,843 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-01-20 10:10:14,844 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-01-20 10:10:14,844 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-01-20 10:10:14,845 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2019-01-20 10:10:14,856 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "speedup-poc-dd-8-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 20.01 10:10:14" (1/1) ... [2019-01-20 10:10:14,857 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "speedup-poc-dd-8-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 20.01 10:10:14" (1/1) ... [2019-01-20 10:10:14,859 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "speedup-poc-dd-8-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 20.01 10:10:14" (1/1) ... [2019-01-20 10:10:14,859 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "speedup-poc-dd-8-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 20.01 10:10:14" (1/1) ... [2019-01-20 10:10:14,864 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "speedup-poc-dd-8-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 20.01 10:10:14" (1/1) ... [2019-01-20 10:10:14,868 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "speedup-poc-dd-8-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 20.01 10:10:14" (1/1) ... [2019-01-20 10:10:14,869 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "speedup-poc-dd-8-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 20.01 10:10:14" (1/1) ... [2019-01-20 10:10:14,873 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-01-20 10:10:14,877 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-01-20 10:10:14,877 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-01-20 10:10:14,877 INFO L276 PluginConnector]: RCFGBuilder initialized [2019-01-20 10:10:14,878 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "speedup-poc-dd-8-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 20.01 10:10:14" (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 [2019-01-20 10:10:14,944 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-01-20 10:10:14,944 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-01-20 10:10:15,329 INFO L281 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-01-20 10:10:15,330 INFO L286 CfgBuilder]: Removed 19 assue(true) statements. [2019-01-20 10:10:15,333 INFO L202 PluginConnector]: Adding new model speedup-poc-dd-8-unlimited.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.01 10:10:15 BoogieIcfgContainer [2019-01-20 10:10:15,333 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-01-20 10:10:15,334 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-01-20 10:10:15,335 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-01-20 10:10:15,338 INFO L276 PluginConnector]: TraceAbstraction initialized [2019-01-20 10:10:15,338 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "speedup-poc-dd-8-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 20.01 10:10:14" (1/2) ... [2019-01-20 10:10:15,340 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2eba79c6 and model type speedup-poc-dd-8-unlimited.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.01 10:10:15, skipping insertion in model container [2019-01-20 10:10:15,340 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "speedup-poc-dd-8-unlimited.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.01 10:10:15" (2/2) ... [2019-01-20 10:10:15,342 INFO L112 eAbstractionObserver]: Analyzing ICFG speedup-poc-dd-8-unlimited.bpl [2019-01-20 10:10:15,353 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-01-20 10:10:15,363 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 8 error locations. [2019-01-20 10:10:15,376 INFO L257 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2019-01-20 10:10:15,404 INFO L382 AbstractCegarLoop]: Interprodecural is true [2019-01-20 10:10:15,404 INFO L383 AbstractCegarLoop]: Hoare is true [2019-01-20 10:10:15,404 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-01-20 10:10:15,404 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-01-20 10:10:15,405 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-01-20 10:10:15,405 INFO L387 AbstractCegarLoop]: Difference is false [2019-01-20 10:10:15,405 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-01-20 10:10:15,405 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-01-20 10:10:15,420 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2019-01-20 10:10:15,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2019-01-20 10:10:15,427 INFO L394 BasicCegarLoop]: Found error trace [2019-01-20 10:10:15,427 INFO L402 BasicCegarLoop]: trace histogram [1, 1] [2019-01-20 10:10:15,430 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-01-20 10:10:15,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-20 10:10:15,436 INFO L82 PathProgramCache]: Analyzing trace with hash 996, now seen corresponding path program 1 times [2019-01-20 10:10:15,439 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-20 10:10:15,478 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-20 10:10:15,478 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-20 10:10:15,479 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-20 10:10:15,479 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-20 10:10:15,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-20 10:10:15,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-20 10:10:15,642 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-01-20 10:10:15,642 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2019-01-20 10:10:15,642 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-01-20 10:10:15,647 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-01-20 10:10:15,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-01-20 10:10:15,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-01-20 10:10:15,664 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 3 states. [2019-01-20 10:10:15,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-20 10:10:15,943 INFO L93 Difference]: Finished difference Result 37 states and 51 transitions. [2019-01-20 10:10:15,943 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-01-20 10:10:15,945 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 2 [2019-01-20 10:10:15,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-20 10:10:15,957 INFO L225 Difference]: With dead ends: 37 [2019-01-20 10:10:15,958 INFO L226 Difference]: Without dead ends: 32 [2019-01-20 10:10:15,960 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 [2019-01-20 10:10:15,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-01-20 10:10:15,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 18. [2019-01-20 10:10:15,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-01-20 10:10:15,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 33 transitions. [2019-01-20 10:10:15,991 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 33 transitions. Word has length 2 [2019-01-20 10:10:15,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-20 10:10:15,993 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 33 transitions. [2019-01-20 10:10:15,993 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-01-20 10:10:15,993 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 33 transitions. [2019-01-20 10:10:15,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-01-20 10:10:15,994 INFO L394 BasicCegarLoop]: Found error trace [2019-01-20 10:10:15,994 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-01-20 10:10:16,006 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-01-20 10:10:16,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-20 10:10:16,007 INFO L82 PathProgramCache]: Analyzing trace with hash 30818, now seen corresponding path program 1 times [2019-01-20 10:10:16,009 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-20 10:10:16,010 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-20 10:10:16,010 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-20 10:10:16,010 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-20 10:10:16,011 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-20 10:10:16,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-20 10:10:16,191 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-20 10:10:16,192 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-20 10:10:16,192 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-20 10:10:16,193 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2019-01-20 10:10:16,195 INFO L207 CegarAbsIntRunner]: [0], [32], [35] [2019-01-20 10:10:16,230 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-20 10:10:16,231 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-20 10:10:16,303 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-20 10:10:16,304 INFO L272 AbstractInterpreter]: Visited 3 different actions 3 times. Never merged. Never widened. Performed 84 root evaluator evaluations with a maximum evaluation depth of 2. Performed 84 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2019-01-20 10:10:16,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-20 10:10:16,310 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-20 10:10:16,311 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-20 10:10:16,311 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 [2019-01-20 10:10:16,324 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-20 10:10:16,324 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-20 10:10:16,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-20 10:10:16,361 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-20 10:10:16,649 WARN L181 SmtUtils]: Spent 246.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2019-01-20 10:10:16,676 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 27 treesize of output 30 [2019-01-20 10:10:16,701 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 30 treesize of output 36 [2019-01-20 10:10:16,746 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:16,775 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:16,777 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 32 treesize of output 46 [2019-01-20 10:10:16,826 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:16,828 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:16,857 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:16,859 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-20 10:10:16,881 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:16,883 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:16,885 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:16,903 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:16,905 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 36 treesize of output 78 [2019-01-20 10:10:16,953 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:16,985 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:17,007 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:17,029 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:17,049 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:17,049 INFO L303 Elim1Store]: Index analysis took 139 ms [2019-01-20 10:10:17,052 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-20 10:10:17,066 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:17,070 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:17,075 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:17,078 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:17,079 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:17,084 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:17,087 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-20 10:10:17,195 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:17,197 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:17,199 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:17,201 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:17,204 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:17,206 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:17,209 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:17,209 INFO L303 Elim1Store]: Index analysis took 115 ms [2019-01-20 10:10:17,212 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 153 [2019-01-20 10:10:17,215 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-01-20 10:10:17,559 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:10:17,939 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:10:17,981 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:10:18,015 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:10:18,045 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:10:18,089 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:10:18,114 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:10:18,174 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:18,176 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 117 treesize of output 114 [2019-01-20 10:10:18,256 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:18,257 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:18,258 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 104 [2019-01-20 10:10:18,349 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:18,353 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:18,354 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:18,355 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:18,356 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 103 [2019-01-20 10:10:18,549 WARN L181 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 40 [2019-01-20 10:10:18,593 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:18,595 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:18,597 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:18,597 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:18,625 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:18,633 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:18,635 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 68 treesize of output 105 [2019-01-20 10:10:18,817 WARN L181 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 45 [2019-01-20 10:10:18,866 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:18,879 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:18,901 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:18,924 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:18,925 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:18,927 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:18,932 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:18,933 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:18,934 INFO L303 Elim1Store]: Index analysis took 112 ms [2019-01-20 10:10:18,939 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 116 [2019-01-20 10:10:19,092 WARN L181 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2019-01-20 10:10:19,122 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:19,123 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:19,124 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:19,126 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:19,127 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:19,128 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:19,130 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:19,131 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:19,132 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:19,133 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:19,137 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 134 [2019-01-20 10:10:19,293 WARN L181 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2019-01-20 10:10:19,301 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:19,302 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:19,303 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:19,305 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:19,306 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:19,307 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:19,308 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:19,310 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:19,311 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:19,312 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:19,313 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:19,315 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:19,317 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 113 [2019-01-20 10:10:19,319 INFO L267 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2019-01-20 10:10:19,418 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:10:19,574 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:10:19,633 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:10:19,693 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:10:19,761 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:10:19,872 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:10:19,990 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 2 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-20 10:10:19,991 INFO L202 ElimStorePlain]: Needed 16 recursive calls to eliminate 8 variables, input treesize:147, output treesize:153 [2019-01-20 10:10:20,056 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:20,058 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 159 [2019-01-20 10:10:20,059 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-20 10:10:20,239 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 1 dim-1 vars, End of recursive call: 7 dim-0 vars, and 1 xjuncts. [2019-01-20 10:10:20,240 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:163, output treesize:125 [2019-01-20 10:10:20,270 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-20 10:10:20,270 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-20 10:10:20,380 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-20 10:10:20,406 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-20 10:10:20,407 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-01-20 10:10:20,407 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-20 10:10:20,408 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-01-20 10:10:20,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-01-20 10:10:20,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-01-20 10:10:20,408 INFO L87 Difference]: Start difference. First operand 18 states and 33 transitions. Second operand 6 states. [2019-01-20 10:10:31,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-20 10:10:31,570 INFO L93 Difference]: Finished difference Result 63 states and 92 transitions. [2019-01-20 10:10:31,570 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-01-20 10:10:31,571 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 3 [2019-01-20 10:10:31,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-20 10:10:31,573 INFO L225 Difference]: With dead ends: 63 [2019-01-20 10:10:31,573 INFO L226 Difference]: Without dead ends: 60 [2019-01-20 10:10:31,575 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 [2019-01-20 10:10:31,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-01-20 10:10:31,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 25. [2019-01-20 10:10:31,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-01-20 10:10:31,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 53 transitions. [2019-01-20 10:10:31,583 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 53 transitions. Word has length 3 [2019-01-20 10:10:31,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-20 10:10:31,583 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 53 transitions. [2019-01-20 10:10:31,583 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-01-20 10:10:31,584 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 53 transitions. [2019-01-20 10:10:31,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-01-20 10:10:31,584 INFO L394 BasicCegarLoop]: Found error trace [2019-01-20 10:10:31,584 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-01-20 10:10:31,585 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-01-20 10:10:31,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-20 10:10:31,585 INFO L82 PathProgramCache]: Analyzing trace with hash 30384, now seen corresponding path program 1 times [2019-01-20 10:10:31,585 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-20 10:10:31,586 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-20 10:10:31,586 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-20 10:10:31,587 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-20 10:10:31,587 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-20 10:10:31,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-20 10:10:31,806 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-20 10:10:31,806 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-20 10:10:31,806 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-20 10:10:31,806 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2019-01-20 10:10:31,807 INFO L207 CegarAbsIntRunner]: [0], [18], [35] [2019-01-20 10:10:31,808 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-20 10:10:31,808 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-20 10:10:31,816 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-20 10:10:31,816 INFO L272 AbstractInterpreter]: Visited 3 different actions 3 times. Never merged. Never widened. Performed 84 root evaluator evaluations with a maximum evaluation depth of 2. Performed 84 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2019-01-20 10:10:31,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-20 10:10:31,817 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-20 10:10:31,817 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-20 10:10:31,817 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 [2019-01-20 10:10:31,834 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-20 10:10:31,834 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-20 10:10:31,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-20 10:10:31,857 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-20 10:10:31,951 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 27 treesize of output 30 [2019-01-20 10:10:31,956 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 30 treesize of output 36 [2019-01-20 10:10:31,964 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:31,965 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:31,967 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 32 treesize of output 46 [2019-01-20 10:10:31,986 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:31,991 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:31,993 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:31,994 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 34 treesize of output 60 [2019-01-20 10:10:32,008 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:32,009 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:32,011 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:32,013 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:32,015 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 36 treesize of output 78 [2019-01-20 10:10:32,021 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:32,023 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:32,031 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:32,033 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:32,034 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:32,036 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-20 10:10:32,057 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:32,059 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:32,061 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:32,063 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:32,065 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:32,066 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:32,068 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-20 10:10:32,127 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2019-01-20 10:10:32,129 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-01-20 10:10:32,223 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:10:32,273 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:10:32,310 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:10:32,338 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:10:32,366 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:10:32,387 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:10:32,415 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:10:32,459 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:32,461 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 91 treesize of output 91 [2019-01-20 10:10:32,544 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:32,568 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:32,569 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-01-20 10:10:32,644 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:32,645 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:32,646 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:32,647 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:32,648 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 63 treesize of output 86 [2019-01-20 10:10:32,725 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:32,726 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:32,727 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:32,727 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:32,728 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:32,730 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:32,732 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 51 treesize of output 91 [2019-01-20 10:10:32,852 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:32,853 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:32,855 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:32,856 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:32,857 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:32,857 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:32,858 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:32,859 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:32,861 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-01-20 10:10:33,055 WARN L181 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 47 [2019-01-20 10:10:33,061 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:33,062 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:33,062 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:33,063 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:33,064 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:33,065 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:33,067 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:33,068 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:33,069 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:33,070 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:33,072 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-01-20 10:10:33,074 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-20 10:10:33,115 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:10:33,192 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:10:33,234 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:10:33,277 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:10:33,323 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:10:33,397 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 2 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-20 10:10:33,398 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 8 variables, input treesize:121, output treesize:125 [2019-01-20 10:10:33,454 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:33,456 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 120 [2019-01-20 10:10:33,457 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-20 10:10:33,550 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-20 10:10:33,550 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:130, output treesize:96 [2019-01-20 10:10:33,572 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-20 10:10:33,572 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-20 10:10:33,584 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-20 10:10:33,605 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-20 10:10:33,605 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-01-20 10:10:33,605 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-20 10:10:33,606 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-01-20 10:10:33,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-01-20 10:10:33,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-01-20 10:10:33,607 INFO L87 Difference]: Start difference. First operand 25 states and 53 transitions. Second operand 6 states. [2019-01-20 10:10:34,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-20 10:10:34,521 INFO L93 Difference]: Finished difference Result 62 states and 99 transitions. [2019-01-20 10:10:34,521 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-01-20 10:10:34,522 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 3 [2019-01-20 10:10:34,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-20 10:10:34,524 INFO L225 Difference]: With dead ends: 62 [2019-01-20 10:10:34,524 INFO L226 Difference]: Without dead ends: 60 [2019-01-20 10:10:34,525 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2019-01-20 10:10:34,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-01-20 10:10:34,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 26. [2019-01-20 10:10:34,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-01-20 10:10:34,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 61 transitions. [2019-01-20 10:10:34,533 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 61 transitions. Word has length 3 [2019-01-20 10:10:34,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-20 10:10:34,533 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 61 transitions. [2019-01-20 10:10:34,533 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-01-20 10:10:34,533 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 61 transitions. [2019-01-20 10:10:34,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-01-20 10:10:34,534 INFO L394 BasicCegarLoop]: Found error trace [2019-01-20 10:10:34,534 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-01-20 10:10:34,534 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-01-20 10:10:34,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-20 10:10:34,534 INFO L82 PathProgramCache]: Analyzing trace with hash 30944, now seen corresponding path program 1 times [2019-01-20 10:10:34,534 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-20 10:10:34,535 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-20 10:10:34,536 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-20 10:10:34,536 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-20 10:10:34,536 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-20 10:10:34,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-20 10:10:34,613 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-20 10:10:34,613 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-01-20 10:10:34,614 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2019-01-20 10:10:34,614 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-01-20 10:10:34,614 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-01-20 10:10:34,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-01-20 10:10:34,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-01-20 10:10:34,615 INFO L87 Difference]: Start difference. First operand 26 states and 61 transitions. Second operand 3 states. [2019-01-20 10:10:34,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-20 10:10:34,695 INFO L93 Difference]: Finished difference Result 31 states and 61 transitions. [2019-01-20 10:10:34,696 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-01-20 10:10:34,696 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2019-01-20 10:10:34,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-20 10:10:34,697 INFO L225 Difference]: With dead ends: 31 [2019-01-20 10:10:34,697 INFO L226 Difference]: Without dead ends: 30 [2019-01-20 10:10:34,698 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 [2019-01-20 10:10:34,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-01-20 10:10:34,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 26. [2019-01-20 10:10:34,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-01-20 10:10:34,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 60 transitions. [2019-01-20 10:10:34,704 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 60 transitions. Word has length 3 [2019-01-20 10:10:34,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-20 10:10:34,704 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 60 transitions. [2019-01-20 10:10:34,705 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-01-20 10:10:34,705 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 60 transitions. [2019-01-20 10:10:34,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-01-20 10:10:34,705 INFO L394 BasicCegarLoop]: Found error trace [2019-01-20 10:10:34,705 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-01-20 10:10:34,706 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-01-20 10:10:34,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-20 10:10:34,706 INFO L82 PathProgramCache]: Analyzing trace with hash 30012, now seen corresponding path program 1 times [2019-01-20 10:10:34,706 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-20 10:10:34,707 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-20 10:10:34,707 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-20 10:10:34,707 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-20 10:10:34,707 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-20 10:10:34,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-20 10:10:34,775 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-20 10:10:34,775 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-20 10:10:34,775 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-20 10:10:34,775 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2019-01-20 10:10:34,776 INFO L207 CegarAbsIntRunner]: [0], [6], [35] [2019-01-20 10:10:34,777 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-20 10:10:34,777 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-20 10:10:34,785 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-20 10:10:34,785 INFO L272 AbstractInterpreter]: Visited 3 different actions 3 times. Never merged. Never widened. Performed 84 root evaluator evaluations with a maximum evaluation depth of 2. Performed 84 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2019-01-20 10:10:34,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-20 10:10:34,786 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-20 10:10:34,786 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-20 10:10:34,786 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 [2019-01-20 10:10:34,795 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-20 10:10:34,795 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-20 10:10:34,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-20 10:10:34,801 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-20 10:10:34,921 WARN L181 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2019-01-20 10:10:34,925 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:34,926 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 91 treesize of output 91 [2019-01-20 10:10:34,973 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:34,974 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:34,975 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-01-20 10:10:35,029 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:35,030 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:35,030 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:35,031 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:35,033 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 63 treesize of output 86 [2019-01-20 10:10:35,094 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:35,096 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:35,097 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:35,111 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:35,112 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:35,112 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:35,114 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 51 treesize of output 91 [2019-01-20 10:10:35,185 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:35,186 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:35,188 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:35,189 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:35,190 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:35,192 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:35,193 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:35,194 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:35,196 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-01-20 10:10:35,291 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:35,292 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:35,293 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:35,294 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:35,295 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:35,296 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:35,297 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:35,299 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:35,300 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:35,301 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:35,303 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-01-20 10:10:35,304 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-20 10:10:35,347 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:10:35,394 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:10:35,464 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:10:35,557 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:10:35,637 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:10:35,693 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 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 27 treesize of output 30 [2019-01-20 10:10:35,700 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 11 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-20 10:10:35,704 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 15 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-20 10:10:35,715 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-20 10:10:35,736 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 20 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-20 10:10:35,752 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 21 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-20 10:10:35,769 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-20 10:10:35,940 INFO L303 Elim1Store]: Index analysis took 168 ms [2019-01-20 10:10:35,942 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2019-01-20 10:10:35,943 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-20 10:10:36,187 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:10:36,234 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:10:36,268 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:10:36,295 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:10:36,382 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:10:36,435 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:10:36,453 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:10:36,528 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 1 xjuncts. [2019-01-20 10:10:36,528 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 9 variables, input treesize:121, output treesize:125 [2019-01-20 10:10:36,631 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:36,633 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 126 [2019-01-20 10:10:36,634 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-20 10:10:36,726 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-20 10:10:36,726 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:130, output treesize:96 [2019-01-20 10:10:36,753 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-20 10:10:36,754 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-20 10:10:36,762 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-20 10:10:36,782 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-01-20 10:10:36,782 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [2, 2] total 5 [2019-01-20 10:10:36,782 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-01-20 10:10:36,782 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-01-20 10:10:36,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-01-20 10:10:36,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2019-01-20 10:10:36,784 INFO L87 Difference]: Start difference. First operand 26 states and 60 transitions. Second operand 4 states. [2019-01-20 10:10:36,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-20 10:10:36,862 INFO L93 Difference]: Finished difference Result 32 states and 98 transitions. [2019-01-20 10:10:36,862 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-01-20 10:10:36,862 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 3 [2019-01-20 10:10:36,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-20 10:10:36,864 INFO L225 Difference]: With dead ends: 32 [2019-01-20 10:10:36,864 INFO L226 Difference]: Without dead ends: 31 [2019-01-20 10:10:36,865 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2019-01-20 10:10:36,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-01-20 10:10:36,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2019-01-20 10:10:36,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-01-20 10:10:36,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 97 transitions. [2019-01-20 10:10:36,873 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 97 transitions. Word has length 3 [2019-01-20 10:10:36,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-20 10:10:36,873 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 97 transitions. [2019-01-20 10:10:36,873 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-01-20 10:10:36,873 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 97 transitions. [2019-01-20 10:10:36,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-01-20 10:10:36,874 INFO L394 BasicCegarLoop]: Found error trace [2019-01-20 10:10:36,874 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-01-20 10:10:36,875 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-01-20 10:10:36,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-20 10:10:36,875 INFO L82 PathProgramCache]: Analyzing trace with hash 30136, now seen corresponding path program 1 times [2019-01-20 10:10:36,875 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-20 10:10:36,876 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-20 10:10:36,876 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-20 10:10:36,876 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-20 10:10:36,876 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-20 10:10:36,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-20 10:10:37,077 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-20 10:10:37,077 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-20 10:10:37,077 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-20 10:10:37,078 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2019-01-20 10:10:37,078 INFO L207 CegarAbsIntRunner]: [0], [10], [35] [2019-01-20 10:10:37,080 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-20 10:10:37,080 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-20 10:10:37,088 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-20 10:10:37,089 INFO L272 AbstractInterpreter]: Visited 3 different actions 3 times. Never merged. Never widened. Performed 84 root evaluator evaluations with a maximum evaluation depth of 2. Performed 84 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2019-01-20 10:10:37,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-20 10:10:37,093 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-20 10:10:37,093 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-20 10:10:37,093 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 [2019-01-20 10:10:37,103 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-20 10:10:37,104 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-20 10:10:37,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-20 10:10:37,112 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-20 10:10:37,153 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 27 treesize of output 30 [2019-01-20 10:10:37,157 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 30 treesize of output 36 [2019-01-20 10:10:37,160 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:37,161 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:37,162 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 32 treesize of output 46 [2019-01-20 10:10:37,174 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:37,175 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:37,176 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:37,177 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-20 10:10:37,182 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:37,186 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:37,187 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:37,188 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:37,189 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 36 treesize of output 78 [2019-01-20 10:10:37,226 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:37,227 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:37,229 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:37,230 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:37,232 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:37,234 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-20 10:10:37,239 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:37,240 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:37,241 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:37,242 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:37,244 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:37,245 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:37,247 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-20 10:10:37,281 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2019-01-20 10:10:37,282 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-01-20 10:10:37,435 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:10:37,481 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:10:37,520 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:10:37,549 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:10:37,573 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:10:37,591 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:10:37,607 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:10:37,654 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:37,656 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 91 treesize of output 91 [2019-01-20 10:10:37,708 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:37,709 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:37,710 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 78 treesize of output 84 [2019-01-20 10:10:37,763 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:37,765 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:37,766 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:37,767 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:37,769 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 63 treesize of output 86 [2019-01-20 10:10:37,875 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:37,898 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:37,921 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:37,933 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:37,937 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:37,938 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:37,938 INFO L303 Elim1Store]: Index analysis took 105 ms [2019-01-20 10:10:37,939 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 51 treesize of output 91 [2019-01-20 10:10:38,023 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:38,024 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:38,026 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:38,028 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:38,029 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:38,031 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:38,032 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:38,037 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:38,038 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-01-20 10:10:38,177 WARN L181 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 47 [2019-01-20 10:10:38,182 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:38,183 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:38,184 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:38,185 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:38,187 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:38,188 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:38,189 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:38,190 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:38,191 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:38,192 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:38,194 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-01-20 10:10:38,195 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-20 10:10:38,238 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:10:38,278 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:10:38,321 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:10:38,363 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:10:38,405 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:10:38,477 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 2 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-20 10:10:38,478 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 8 variables, input treesize:121, output treesize:125 [2019-01-20 10:10:38,529 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:38,531 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 126 [2019-01-20 10:10:38,533 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-20 10:10:38,608 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-20 10:10:38,608 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:130, output treesize:96 [2019-01-20 10:10:38,625 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-20 10:10:38,625 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-20 10:10:38,671 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-20 10:10:38,691 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-20 10:10:38,691 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-01-20 10:10:38,691 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-20 10:10:38,691 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-01-20 10:10:38,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-01-20 10:10:38,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-01-20 10:10:38,692 INFO L87 Difference]: Start difference. First operand 30 states and 97 transitions. Second operand 6 states. [2019-01-20 10:10:39,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-20 10:10:39,549 INFO L93 Difference]: Finished difference Result 65 states and 143 transitions. [2019-01-20 10:10:39,549 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-01-20 10:10:39,550 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 3 [2019-01-20 10:10:39,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-20 10:10:39,550 INFO L225 Difference]: With dead ends: 65 [2019-01-20 10:10:39,551 INFO L226 Difference]: Without dead ends: 64 [2019-01-20 10:10:39,551 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2019-01-20 10:10:39,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2019-01-20 10:10:39,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 32. [2019-01-20 10:10:39,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-01-20 10:10:39,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 115 transitions. [2019-01-20 10:10:39,560 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 115 transitions. Word has length 3 [2019-01-20 10:10:39,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-20 10:10:39,560 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 115 transitions. [2019-01-20 10:10:39,560 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-01-20 10:10:39,561 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 115 transitions. [2019-01-20 10:10:39,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-01-20 10:10:39,561 INFO L394 BasicCegarLoop]: Found error trace [2019-01-20 10:10:39,561 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-01-20 10:10:39,562 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-01-20 10:10:39,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-20 10:10:39,562 INFO L82 PathProgramCache]: Analyzing trace with hash 30632, now seen corresponding path program 1 times [2019-01-20 10:10:39,562 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-20 10:10:39,562 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-20 10:10:39,563 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-20 10:10:39,563 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-20 10:10:39,563 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-20 10:10:39,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-20 10:10:39,686 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-20 10:10:39,686 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-20 10:10:39,687 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-20 10:10:39,687 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2019-01-20 10:10:39,687 INFO L207 CegarAbsIntRunner]: [0], [26], [35] [2019-01-20 10:10:39,688 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-20 10:10:39,688 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-20 10:10:39,694 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-20 10:10:39,694 INFO L272 AbstractInterpreter]: Visited 3 different actions 3 times. Never merged. Never widened. Performed 84 root evaluator evaluations with a maximum evaluation depth of 2. Performed 84 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2019-01-20 10:10:39,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-20 10:10:39,695 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-20 10:10:39,695 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-20 10:10:39,695 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 [2019-01-20 10:10:39,705 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-20 10:10:39,705 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-20 10:10:39,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-20 10:10:39,711 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-20 10:10:39,742 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 27 treesize of output 30 [2019-01-20 10:10:39,745 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 30 treesize of output 36 [2019-01-20 10:10:39,790 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:39,814 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:39,815 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 32 treesize of output 46 [2019-01-20 10:10:39,854 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:39,877 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:39,898 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:39,903 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 34 treesize of output 60 [2019-01-20 10:10:39,932 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:39,952 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:39,974 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:39,996 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:39,998 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 36 treesize of output 78 [2019-01-20 10:10:40,033 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:40,055 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:40,078 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:40,103 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:40,133 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:40,133 INFO L303 Elim1Store]: Index analysis took 132 ms [2019-01-20 10:10:40,134 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-20 10:10:40,164 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:40,185 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:40,208 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:40,229 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:40,254 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:40,279 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:40,280 INFO L303 Elim1Store]: Index analysis took 142 ms [2019-01-20 10:10:40,281 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-20 10:10:40,441 INFO L303 Elim1Store]: Index analysis took 157 ms [2019-01-20 10:10:40,442 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2019-01-20 10:10:40,443 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-01-20 10:10:40,506 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:10:40,550 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:10:40,588 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:10:40,616 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:10:40,641 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:10:40,670 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:10:40,690 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:10:40,739 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:40,740 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 91 treesize of output 91 [2019-01-20 10:10:40,791 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:40,792 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:40,793 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 78 treesize of output 84 [2019-01-20 10:10:40,845 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:40,846 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:40,847 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:40,848 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:40,849 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 63 treesize of output 86 [2019-01-20 10:10:40,909 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:40,910 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:40,911 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:40,912 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:40,913 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:40,914 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:40,916 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 51 treesize of output 91 [2019-01-20 10:10:40,991 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:40,993 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:40,994 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:40,995 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:40,996 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:40,997 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:40,999 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:41,000 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:41,001 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-01-20 10:10:41,094 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:41,095 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:41,102 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:41,102 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:41,103 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:41,104 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:41,104 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:41,105 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:41,106 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:41,107 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:41,109 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-01-20 10:10:41,110 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-20 10:10:41,149 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:10:41,189 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:10:41,229 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:10:41,269 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:10:41,311 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:10:41,383 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 2 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-20 10:10:41,384 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 8 variables, input treesize:121, output treesize:125 [2019-01-20 10:10:41,427 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:41,428 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 126 [2019-01-20 10:10:41,429 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-20 10:10:41,497 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-20 10:10:41,498 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:130, output treesize:96 [2019-01-20 10:10:41,516 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-20 10:10:41,517 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-20 10:10:41,528 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-20 10:10:41,546 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-20 10:10:41,547 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-01-20 10:10:41,547 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-20 10:10:41,547 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-01-20 10:10:41,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-01-20 10:10:41,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-01-20 10:10:41,548 INFO L87 Difference]: Start difference. First operand 32 states and 115 transitions. Second operand 6 states. [2019-01-20 10:10:42,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-20 10:10:42,276 INFO L93 Difference]: Finished difference Result 67 states and 161 transitions. [2019-01-20 10:10:42,276 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-01-20 10:10:42,276 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 3 [2019-01-20 10:10:42,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-20 10:10:42,277 INFO L225 Difference]: With dead ends: 67 [2019-01-20 10:10:42,277 INFO L226 Difference]: Without dead ends: 65 [2019-01-20 10:10:42,278 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 [2019-01-20 10:10:42,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-01-20 10:10:42,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 34. [2019-01-20 10:10:42,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-01-20 10:10:42,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 132 transitions. [2019-01-20 10:10:42,286 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 132 transitions. Word has length 3 [2019-01-20 10:10:42,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-20 10:10:42,287 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 132 transitions. [2019-01-20 10:10:42,287 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-01-20 10:10:42,287 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 132 transitions. [2019-01-20 10:10:42,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-20 10:10:42,287 INFO L394 BasicCegarLoop]: Found error trace [2019-01-20 10:10:42,287 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-20 10:10:42,288 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-01-20 10:10:42,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-20 10:10:42,288 INFO L82 PathProgramCache]: Analyzing trace with hash 954866, now seen corresponding path program 1 times [2019-01-20 10:10:42,288 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-20 10:10:42,289 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-20 10:10:42,289 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-20 10:10:42,289 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-20 10:10:42,289 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-20 10:10:42,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-20 10:10:42,393 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-20 10:10:42,393 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-20 10:10:42,393 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-20 10:10:42,393 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-20 10:10:42,394 INFO L207 CegarAbsIntRunner]: [0], [18], [32], [35] [2019-01-20 10:10:42,394 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-20 10:10:42,395 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-20 10:10:42,400 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-20 10:10:42,400 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 86 root evaluator evaluations with a maximum evaluation depth of 2. Performed 86 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-20 10:10:42,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-20 10:10:42,400 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-20 10:10:42,401 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-20 10:10:42,401 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 [2019-01-20 10:10:42,411 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-20 10:10:42,412 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-20 10:10:42,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-20 10:10:42,419 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-20 10:10:42,467 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 27 treesize of output 30 [2019-01-20 10:10:42,475 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 30 treesize of output 36 [2019-01-20 10:10:42,479 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:42,481 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:42,482 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 32 treesize of output 46 [2019-01-20 10:10:42,496 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:42,498 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:42,500 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:42,501 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 34 treesize of output 60 [2019-01-20 10:10:42,509 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:42,512 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:42,514 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:42,517 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:42,518 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 36 treesize of output 78 [2019-01-20 10:10:42,527 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:42,530 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:42,533 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:42,536 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:42,538 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:42,539 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-20 10:10:42,567 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:42,570 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:42,573 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:42,575 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:42,578 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:42,580 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:42,581 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-20 10:10:42,586 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:42,587 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:42,588 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:42,589 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:42,591 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:42,592 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:42,596 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:42,597 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 153 [2019-01-20 10:10:42,600 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-01-20 10:10:42,777 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:10:42,869 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:10:42,907 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:10:42,935 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:10:42,961 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:10:42,981 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:10:43,001 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:10:43,049 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:43,050 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 117 treesize of output 114 [2019-01-20 10:10:43,139 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:43,140 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:43,142 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 101 treesize of output 104 [2019-01-20 10:10:43,239 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:43,241 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:43,242 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:43,243 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:43,244 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 83 treesize of output 103 [2019-01-20 10:10:43,353 WARN L181 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 40 [2019-01-20 10:10:43,358 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:43,359 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:43,359 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:43,360 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:43,361 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:43,362 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:43,363 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 105 [2019-01-20 10:10:43,447 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:43,456 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:43,457 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:43,458 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:43,459 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:43,460 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:43,461 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:43,463 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:43,464 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 116 [2019-01-20 10:10:43,563 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:43,564 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:43,565 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:43,566 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:43,567 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:43,569 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:43,570 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:43,571 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:43,572 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:43,573 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:43,575 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 134 [2019-01-20 10:10:43,708 WARN L181 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2019-01-20 10:10:43,714 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:43,715 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:43,725 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:43,726 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:43,727 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:43,728 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:43,729 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:43,730 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:43,731 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:43,732 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:43,733 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:43,735 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:43,736 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 113 [2019-01-20 10:10:43,737 INFO L267 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2019-01-20 10:10:43,793 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:10:43,852 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:10:43,911 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:10:43,972 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:10:44,034 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:10:44,097 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:10:44,196 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. [2019-01-20 10:10:44,196 INFO L202 ElimStorePlain]: Needed 16 recursive calls to eliminate 7 variables, input treesize:147, output treesize:153 [2019-01-20 10:10:44,241 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:44,242 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 159 [2019-01-20 10:10:44,243 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-20 10:10:44,337 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-20 10:10:44,337 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:163, output treesize:125 [2019-01-20 10:10:44,474 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:44,475 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:44,475 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:44,483 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:44,484 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:44,484 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:44,485 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:44,486 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:44,487 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:44,488 INFO L683 Elim1Store]: detected equality via solver [2019-01-20 10:10:44,489 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 166 [2019-01-20 10:10:44,490 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-20 10:10:44,586 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 1 dim-1 vars, End of recursive call: 7 dim-0 vars, and 1 xjuncts. [2019-01-20 10:10:44,586 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:137, output treesize:105 [2019-01-20 10:10:44,663 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-20 10:10:44,663 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-20 10:10:44,707 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-20 10:10:44,726 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-20 10:10:44,726 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-20 10:10:44,726 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-20 10:10:44,726 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-20 10:10:44,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-20 10:10:44,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2019-01-20 10:10:44,727 INFO L87 Difference]: Start difference. First operand 34 states and 132 transitions. Second operand 8 states. [2019-01-20 10:10:49,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-20 10:10:49,028 INFO L93 Difference]: Finished difference Result 82 states and 191 transitions. [2019-01-20 10:10:49,028 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-20 10:10:49,028 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-20 10:10:49,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-20 10:10:49,030 INFO L225 Difference]: With dead ends: 82 [2019-01-20 10:10:49,030 INFO L226 Difference]: Without dead ends: 80 [2019-01-20 10:10:49,031 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2019-01-20 10:10:49,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2019-01-20 10:10:49,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 36. [2019-01-20 10:10:49,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-01-20 10:10:49,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 128 transitions. [2019-01-20 10:10:49,040 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 128 transitions. Word has length 4 [2019-01-20 10:10:49,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-20 10:10:49,040 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 128 transitions. [2019-01-20 10:10:49,040 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-20 10:10:49,040 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 128 transitions. [2019-01-20 10:10:49,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-20 10:10:49,041 INFO L394 BasicCegarLoop]: Found error trace [2019-01-20 10:10:49,041 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-20 10:10:49,041 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-01-20 10:10:49,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-20 10:10:49,042 INFO L82 PathProgramCache]: Analyzing trace with hash 955426, now seen corresponding path program 1 times [2019-01-20 10:10:49,042 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-20 10:10:49,042 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-20 10:10:49,043 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-20 10:10:49,043 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-20 10:10:49,043 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-20 10:10:49,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-20 10:10:49,168 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-20 10:10:49,168 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-20 10:10:49,168 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-20 10:10:49,168 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-20 10:10:49,169 INFO L207 CegarAbsIntRunner]: [0], [32], [36], [37] [2019-01-20 10:10:49,170 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-20 10:10:49,170 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-20 10:10:49,179 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-20 10:10:49,179 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 86 root evaluator evaluations with a maximum evaluation depth of 2. Performed 86 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2019-01-20 10:10:49,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-20 10:10:49,180 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-20 10:10:49,180 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-20 10:10:49,180 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 [2019-01-20 10:10:49,188 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-20 10:10:49,188 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-20 10:10:49,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-20 10:10:49,197 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-20 10:10:49,215 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 86 treesize of output 76 [2019-01-20 10:10:49,266 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:49,272 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:49,273 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 80 [2019-01-20 10:10:49,320 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:49,323 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:49,328 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:49,331 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:49,332 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 63 treesize of output 82 [2019-01-20 10:10:49,412 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:49,415 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:49,418 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:49,420 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:49,422 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:49,428 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:49,429 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 51 treesize of output 87 [2019-01-20 10:10:49,537 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:49,539 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:49,541 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:49,543 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:49,545 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:49,548 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:49,550 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:49,556 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:49,557 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 101 [2019-01-20 10:10:49,675 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:49,692 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:49,694 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:49,696 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:49,698 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:49,700 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:49,701 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:49,703 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:49,704 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:49,708 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:49,709 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 81 [2019-01-20 10:10:49,709 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-20 10:10:49,768 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:10:49,824 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:10:49,884 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:10:49,945 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:10:50,010 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:10:50,130 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 27 treesize of output 30 [2019-01-20 10:10:50,135 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 10 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2019-01-20 10:10:50,174 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 14 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 42 [2019-01-20 10:10:50,203 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 17 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 56 [2019-01-20 10:10:50,214 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 19 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 74 [2019-01-20 10:10:50,222 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 20 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 96 [2019-01-20 10:10:50,247 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 20 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 122 [2019-01-20 10:10:50,262 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 121 [2019-01-20 10:10:50,263 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-20 10:10:50,316 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:10:50,357 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:10:50,389 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:10:50,413 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:10:50,430 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:10:50,446 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:10:50,463 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:10:50,534 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 2 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-20 10:10:50,535 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 8 variables, input treesize:113, output treesize:121 [2019-01-20 10:10:51,202 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:51,263 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 21 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 14 case distinctions, treesize of input 51 treesize of output 149 [2019-01-20 10:10:51,264 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2019-01-20 10:10:51,319 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 128 xjuncts. [2019-01-20 10:10:53,109 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 1 dim-1 vars, End of recursive call: 54 dim-0 vars, and 9 xjuncts. [2019-01-20 10:10:53,110 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:131, output treesize:957 [2019-01-20 10:11:02,964 WARN L181 SmtUtils]: Spent 7.58 s on a formula simplification. DAG size of input: 519 DAG size of output: 113 [2019-01-20 10:11:02,972 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-20 10:11:02,972 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-20 10:11:02,977 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-20 10:11:02,996 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-01-20 10:11:02,996 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [2, 2] total 5 [2019-01-20 10:11:02,996 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-01-20 10:11:02,997 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-01-20 10:11:02,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-01-20 10:11:02,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=22, Unknown=1, NotChecked=0, Total=42 [2019-01-20 10:11:02,997 INFO L87 Difference]: Start difference. First operand 36 states and 128 transitions. Second operand 4 states. [2019-01-20 10:11:03,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-20 10:11:03,062 INFO L93 Difference]: Finished difference Result 40 states and 140 transitions. [2019-01-20 10:11:03,062 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-01-20 10:11:03,063 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2019-01-20 10:11:03,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-20 10:11:03,064 INFO L225 Difference]: With dead ends: 40 [2019-01-20 10:11:03,064 INFO L226 Difference]: Without dead ends: 39 [2019-01-20 10:11:03,065 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=19, Invalid=22, Unknown=1, NotChecked=0, Total=42 [2019-01-20 10:11:03,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-01-20 10:11:03,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2019-01-20 10:11:03,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-01-20 10:11:03,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 138 transitions. [2019-01-20 10:11:03,072 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 138 transitions. Word has length 4 [2019-01-20 10:11:03,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-20 10:11:03,073 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 138 transitions. [2019-01-20 10:11:03,073 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-01-20 10:11:03,073 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 138 transitions. [2019-01-20 10:11:03,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-20 10:11:03,074 INFO L394 BasicCegarLoop]: Found error trace [2019-01-20 10:11:03,074 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-20 10:11:03,074 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-01-20 10:11:03,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-20 10:11:03,074 INFO L82 PathProgramCache]: Analyzing trace with hash 954990, now seen corresponding path program 1 times [2019-01-20 10:11:03,074 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-20 10:11:03,075 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-20 10:11:03,075 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-20 10:11:03,076 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-20 10:11:03,076 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-20 10:11:03,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-20 10:11:03,409 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-20 10:11:03,410 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-20 10:11:03,410 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-20 10:11:03,410 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-20 10:11:03,410 INFO L207 CegarAbsIntRunner]: [0], [22], [32], [35] [2019-01-20 10:11:03,411 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-20 10:11:03,411 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-20 10:11:03,416 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-20 10:11:03,416 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 86 root evaluator evaluations with a maximum evaluation depth of 2. Performed 86 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-20 10:11:03,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-20 10:11:03,417 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-20 10:11:03,417 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-20 10:11:03,417 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 [2019-01-20 10:11:03,434 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-20 10:11:03,435 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-20 10:11:03,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-20 10:11:03,454 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-20 10:11:03,539 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:03,540 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 117 treesize of output 114 [2019-01-20 10:11:03,616 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:03,618 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:03,619 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 101 treesize of output 104 [2019-01-20 10:11:03,677 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:03,681 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:03,684 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:03,687 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:03,688 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 83 treesize of output 103 [2019-01-20 10:11:03,757 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:03,762 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:03,765 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:03,769 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:03,774 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:03,777 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:03,778 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 68 treesize of output 105 [2019-01-20 10:11:03,861 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:03,864 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:03,866 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:03,870 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:03,873 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:03,874 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:03,877 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:03,880 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:03,881 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 116 [2019-01-20 10:11:03,983 WARN L181 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2019-01-20 10:11:03,990 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:03,992 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:03,993 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:03,995 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:03,997 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:03,998 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:04,000 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:04,001 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:04,003 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:04,004 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:04,005 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 134 [2019-01-20 10:11:04,136 WARN L181 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2019-01-20 10:11:04,141 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:04,142 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:04,145 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:04,146 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:04,147 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:04,149 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:04,151 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:04,152 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:04,154 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:04,156 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:04,158 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:04,159 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:04,160 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 113 [2019-01-20 10:11:04,161 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-20 10:11:04,226 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:04,294 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:04,367 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:04,441 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:04,513 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:04,587 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:04,675 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 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 27 treesize of output 30 [2019-01-20 10:11:04,678 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 13 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-20 10:11:04,681 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 18 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-20 10:11:04,686 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 22 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-20 10:11:04,695 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 25 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-20 10:11:04,714 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 27 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-20 10:11:04,732 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 28 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-20 10:11:04,745 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 153 [2019-01-20 10:11:04,746 INFO L267 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2019-01-20 10:11:04,878 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:04,919 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:04,952 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:04,987 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:05,009 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:05,026 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:05,041 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:05,140 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. [2019-01-20 10:11:05,140 INFO L202 ElimStorePlain]: Needed 16 recursive calls to eliminate 7 variables, input treesize:147, output treesize:153 [2019-01-20 10:11:05,215 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:05,216 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 159 [2019-01-20 10:11:05,217 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-20 10:11:05,367 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-20 10:11:05,367 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:163, output treesize:125 [2019-01-20 10:11:05,504 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:05,505 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:05,506 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:05,507 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:05,508 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:05,510 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:05,511 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:05,512 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:05,513 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:05,514 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:05,516 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 31 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 175 [2019-01-20 10:11:05,517 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-20 10:11:05,639 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 1 dim-1 vars, End of recursive call: 7 dim-0 vars, and 1 xjuncts. [2019-01-20 10:11:05,639 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:137, output treesize:103 [2019-01-20 10:11:05,721 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-20 10:11:05,721 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-20 10:11:05,743 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-20 10:11:05,762 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-20 10:11:05,762 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-20 10:11:05,762 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-20 10:11:05,763 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-20 10:11:05,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-20 10:11:05,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2019-01-20 10:11:05,763 INFO L87 Difference]: Start difference. First operand 38 states and 138 transitions. Second operand 8 states. [2019-01-20 10:11:09,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-20 10:11:09,745 INFO L93 Difference]: Finished difference Result 84 states and 220 transitions. [2019-01-20 10:11:09,745 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-20 10:11:09,745 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-20 10:11:09,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-20 10:11:09,747 INFO L225 Difference]: With dead ends: 84 [2019-01-20 10:11:09,747 INFO L226 Difference]: Without dead ends: 82 [2019-01-20 10:11:09,748 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2019-01-20 10:11:09,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2019-01-20 10:11:09,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 43. [2019-01-20 10:11:09,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-01-20 10:11:09,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 174 transitions. [2019-01-20 10:11:09,758 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 174 transitions. Word has length 4 [2019-01-20 10:11:09,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-20 10:11:09,758 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 174 transitions. [2019-01-20 10:11:09,758 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-20 10:11:09,758 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 174 transitions. [2019-01-20 10:11:09,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-20 10:11:09,759 INFO L394 BasicCegarLoop]: Found error trace [2019-01-20 10:11:09,759 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-20 10:11:09,759 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-01-20 10:11:09,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-20 10:11:09,760 INFO L82 PathProgramCache]: Analyzing trace with hash 954618, now seen corresponding path program 1 times [2019-01-20 10:11:09,760 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-20 10:11:09,761 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-20 10:11:09,761 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-20 10:11:09,761 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-20 10:11:09,761 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-20 10:11:09,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-20 10:11:09,838 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-20 10:11:09,839 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-20 10:11:09,839 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-20 10:11:09,839 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-20 10:11:09,839 INFO L207 CegarAbsIntRunner]: [0], [10], [32], [35] [2019-01-20 10:11:09,840 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-20 10:11:09,841 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-20 10:11:09,844 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-20 10:11:09,844 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 86 root evaluator evaluations with a maximum evaluation depth of 2. Performed 86 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-20 10:11:09,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-20 10:11:09,845 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-20 10:11:09,845 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-20 10:11:09,845 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 [2019-01-20 10:11:09,853 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-20 10:11:09,853 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-20 10:11:09,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-20 10:11:09,860 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-20 10:11:09,913 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:09,915 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 117 treesize of output 114 [2019-01-20 10:11:09,985 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:09,986 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:09,987 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 101 treesize of output 104 [2019-01-20 10:11:10,046 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:10,047 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:10,048 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:10,049 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:10,050 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 83 treesize of output 103 [2019-01-20 10:11:10,116 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:10,117 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:10,118 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:10,119 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:10,120 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:10,121 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:10,122 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 68 treesize of output 105 [2019-01-20 10:11:10,204 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:10,205 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:10,206 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:10,208 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:10,209 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:10,210 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:10,211 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:10,213 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:10,214 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 116 [2019-01-20 10:11:10,316 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:10,317 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:10,319 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:10,320 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:10,321 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:10,322 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:10,324 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:10,325 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:10,326 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:10,327 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:10,328 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 134 [2019-01-20 10:11:10,469 WARN L181 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2019-01-20 10:11:10,473 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:10,474 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:10,475 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:10,476 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:10,478 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:10,479 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:10,480 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:10,481 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:10,483 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:10,484 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:10,485 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:10,486 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:10,487 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 113 [2019-01-20 10:11:10,488 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-20 10:11:10,547 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:10,606 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:10,667 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:10,730 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:10,792 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:10,856 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:10,948 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 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 27 treesize of output 30 [2019-01-20 10:11:10,962 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 13 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-20 10:11:10,965 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 18 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-20 10:11:10,970 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 22 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-20 10:11:10,974 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 25 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-20 10:11:11,002 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 27 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-20 10:11:11,021 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 28 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-20 10:11:11,040 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 153 [2019-01-20 10:11:11,041 INFO L267 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2019-01-20 10:11:11,124 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:11,168 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:11,202 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:11,227 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:11,248 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:11,266 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:11,281 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:11,379 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. [2019-01-20 10:11:11,380 INFO L202 ElimStorePlain]: Needed 16 recursive calls to eliminate 7 variables, input treesize:147, output treesize:153 [2019-01-20 10:11:11,415 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:11,417 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 159 [2019-01-20 10:11:11,418 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-20 10:11:11,514 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-20 10:11:11,514 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:163, output treesize:125 [2019-01-20 10:11:11,748 WARN L181 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2019-01-20 10:11:11,786 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:11,799 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:11,820 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:11,839 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:11,840 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:11,841 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:11,841 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:11,842 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:11,843 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:11,843 INFO L683 Elim1Store]: detected equality via solver [2019-01-20 10:11:11,845 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 174 [2019-01-20 10:11:11,846 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-20 10:11:11,947 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 1 dim-1 vars, End of recursive call: 7 dim-0 vars, and 1 xjuncts. [2019-01-20 10:11:11,948 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:137, output treesize:105 [2019-01-20 10:11:11,973 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-20 10:11:11,973 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-20 10:11:11,996 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-20 10:11:12,015 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-20 10:11:12,015 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-20 10:11:12,015 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-20 10:11:12,015 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-20 10:11:12,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-20 10:11:12,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2019-01-20 10:11:12,016 INFO L87 Difference]: Start difference. First operand 43 states and 174 transitions. Second operand 8 states. [2019-01-20 10:11:16,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-20 10:11:16,053 INFO L93 Difference]: Finished difference Result 81 states and 223 transitions. [2019-01-20 10:11:16,053 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-20 10:11:16,053 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-20 10:11:16,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-20 10:11:16,054 INFO L225 Difference]: With dead ends: 81 [2019-01-20 10:11:16,054 INFO L226 Difference]: Without dead ends: 80 [2019-01-20 10:11:16,054 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2019-01-20 10:11:16,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2019-01-20 10:11:16,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 43. [2019-01-20 10:11:16,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-01-20 10:11:16,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 174 transitions. [2019-01-20 10:11:16,062 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 174 transitions. Word has length 4 [2019-01-20 10:11:16,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-20 10:11:16,062 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 174 transitions. [2019-01-20 10:11:16,062 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-20 10:11:16,062 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 174 transitions. [2019-01-20 10:11:16,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-20 10:11:16,063 INFO L394 BasicCegarLoop]: Found error trace [2019-01-20 10:11:16,063 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-20 10:11:16,063 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-01-20 10:11:16,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-20 10:11:16,064 INFO L82 PathProgramCache]: Analyzing trace with hash 955114, now seen corresponding path program 1 times [2019-01-20 10:11:16,064 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-20 10:11:16,064 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-20 10:11:16,065 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-20 10:11:16,065 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-20 10:11:16,065 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-20 10:11:16,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-20 10:11:16,222 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-20 10:11:16,222 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-20 10:11:16,222 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-20 10:11:16,223 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-20 10:11:16,223 INFO L207 CegarAbsIntRunner]: [0], [26], [32], [35] [2019-01-20 10:11:16,223 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-20 10:11:16,224 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-20 10:11:16,230 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-20 10:11:16,230 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 86 root evaluator evaluations with a maximum evaluation depth of 2. Performed 86 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-20 10:11:16,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-20 10:11:16,230 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-20 10:11:16,230 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-20 10:11:16,231 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 [2019-01-20 10:11:16,240 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-20 10:11:16,241 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-20 10:11:16,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-20 10:11:16,248 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-20 10:11:16,285 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:16,286 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 117 treesize of output 114 [2019-01-20 10:11:16,342 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:16,344 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:16,345 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 101 treesize of output 104 [2019-01-20 10:11:16,403 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:16,406 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:16,408 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:16,411 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:16,412 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 83 treesize of output 103 [2019-01-20 10:11:16,480 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:16,483 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:16,485 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:16,489 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:16,491 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:16,495 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:16,495 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 105 [2019-01-20 10:11:16,579 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:16,583 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:16,585 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:16,588 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:16,591 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:16,594 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:16,597 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:16,599 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:16,600 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 116 [2019-01-20 10:11:16,794 WARN L181 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2019-01-20 10:11:16,799 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:16,801 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:16,803 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:16,804 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:16,806 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:16,807 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:16,810 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:16,813 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:16,815 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:16,817 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:16,818 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 134 [2019-01-20 10:11:16,945 WARN L181 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2019-01-20 10:11:16,950 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:16,952 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:16,954 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:16,956 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:16,957 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:16,959 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:16,962 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:16,964 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:16,966 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:16,967 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:16,970 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:16,972 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:16,973 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 113 [2019-01-20 10:11:16,974 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-20 10:11:17,037 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:17,105 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:17,176 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:17,254 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:17,332 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:17,409 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:17,511 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 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 27 treesize of output 30 [2019-01-20 10:11:17,527 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 13 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-20 10:11:17,542 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 18 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-20 10:11:17,545 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 22 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-20 10:11:17,550 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 25 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-20 10:11:17,554 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 27 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-20 10:11:17,558 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 28 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-20 10:11:17,563 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 153 [2019-01-20 10:11:17,564 INFO L267 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2019-01-20 10:11:17,637 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:17,687 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:17,718 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:17,745 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:17,766 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:17,785 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:17,802 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:17,899 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. [2019-01-20 10:11:17,899 INFO L202 ElimStorePlain]: Needed 16 recursive calls to eliminate 7 variables, input treesize:147, output treesize:153 [2019-01-20 10:11:17,937 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:17,938 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 159 [2019-01-20 10:11:17,939 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-20 10:11:18,048 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-20 10:11:18,048 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:163, output treesize:125 [2019-01-20 10:11:18,081 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:18,082 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:18,082 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:18,083 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:18,084 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:18,085 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:18,086 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:18,088 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:18,089 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:18,089 INFO L683 Elim1Store]: detected equality via solver [2019-01-20 10:11:18,091 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 174 [2019-01-20 10:11:18,092 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-20 10:11:18,196 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 1 dim-1 vars, End of recursive call: 7 dim-0 vars, and 1 xjuncts. [2019-01-20 10:11:18,196 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:137, output treesize:105 [2019-01-20 10:11:18,347 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-20 10:11:18,347 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-20 10:11:18,371 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-20 10:11:18,391 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-20 10:11:18,391 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-20 10:11:18,391 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-20 10:11:18,391 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-20 10:11:18,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-20 10:11:18,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2019-01-20 10:11:18,392 INFO L87 Difference]: Start difference. First operand 43 states and 174 transitions. Second operand 8 states. [2019-01-20 10:11:20,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-20 10:11:20,117 INFO L93 Difference]: Finished difference Result 81 states and 223 transitions. [2019-01-20 10:11:20,117 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-20 10:11:20,117 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-20 10:11:20,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-20 10:11:20,119 INFO L225 Difference]: With dead ends: 81 [2019-01-20 10:11:20,119 INFO L226 Difference]: Without dead ends: 79 [2019-01-20 10:11:20,119 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2019-01-20 10:11:20,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2019-01-20 10:11:20,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 44. [2019-01-20 10:11:20,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-01-20 10:11:20,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 175 transitions. [2019-01-20 10:11:20,130 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 175 transitions. Word has length 4 [2019-01-20 10:11:20,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-20 10:11:20,130 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 175 transitions. [2019-01-20 10:11:20,130 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-20 10:11:20,131 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 175 transitions. [2019-01-20 10:11:20,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-20 10:11:20,131 INFO L394 BasicCegarLoop]: Found error trace [2019-01-20 10:11:20,131 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-20 10:11:20,132 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-01-20 10:11:20,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-20 10:11:20,132 INFO L82 PathProgramCache]: Analyzing trace with hash 954742, now seen corresponding path program 1 times [2019-01-20 10:11:20,132 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-20 10:11:20,133 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-20 10:11:20,133 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-20 10:11:20,133 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-20 10:11:20,133 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-20 10:11:20,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-20 10:11:20,335 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-20 10:11:20,336 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-20 10:11:20,336 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-20 10:11:20,336 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-20 10:11:20,336 INFO L207 CegarAbsIntRunner]: [0], [14], [32], [35] [2019-01-20 10:11:20,338 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-20 10:11:20,338 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-20 10:11:20,344 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-20 10:11:20,344 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 86 root evaluator evaluations with a maximum evaluation depth of 2. Performed 86 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-20 10:11:20,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-20 10:11:20,344 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-20 10:11:20,345 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-20 10:11:20,345 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 [2019-01-20 10:11:20,353 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-20 10:11:20,353 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-20 10:11:20,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-20 10:11:20,361 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-20 10:11:20,423 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 27 treesize of output 30 [2019-01-20 10:11:20,442 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 30 treesize of output 36 [2019-01-20 10:11:20,484 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:20,506 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:20,507 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 32 treesize of output 46 [2019-01-20 10:11:20,547 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:20,571 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:20,595 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:20,596 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-20 10:11:20,634 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:20,662 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:20,684 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:20,701 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:20,702 INFO L303 Elim1Store]: Index analysis took 103 ms [2019-01-20 10:11:20,703 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 36 treesize of output 78 [2019-01-20 10:11:20,740 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:20,765 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:20,778 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:20,794 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:20,817 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:20,817 INFO L303 Elim1Store]: Index analysis took 112 ms [2019-01-20 10:11:20,818 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-20 10:11:20,859 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:20,881 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:20,908 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:20,929 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:20,953 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:20,978 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:20,979 INFO L303 Elim1Store]: Index analysis took 158 ms [2019-01-20 10:11:20,980 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-20 10:11:21,013 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:21,020 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:21,021 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:21,022 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:21,023 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:21,024 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:21,026 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:21,027 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 153 [2019-01-20 10:11:21,028 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-01-20 10:11:21,109 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:21,158 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:21,196 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:21,227 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:21,254 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:21,277 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:21,299 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:21,355 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:21,356 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 117 treesize of output 114 [2019-01-20 10:11:21,417 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:21,418 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:21,419 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 101 treesize of output 104 [2019-01-20 10:11:21,479 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:21,479 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:21,480 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:21,481 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:21,482 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 83 treesize of output 103 [2019-01-20 10:11:21,547 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:21,549 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:21,550 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:21,551 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:21,552 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:21,553 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:21,554 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 68 treesize of output 105 [2019-01-20 10:11:21,634 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:21,635 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:21,636 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:21,638 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:21,639 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:21,640 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:21,641 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:21,642 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:21,644 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 116 [2019-01-20 10:11:21,748 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:21,749 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:21,751 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:21,752 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:21,753 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:21,754 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:21,755 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:21,756 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:21,758 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:21,759 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:21,760 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 134 [2019-01-20 10:11:21,891 WARN L181 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2019-01-20 10:11:21,895 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:21,896 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:21,897 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:21,898 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:21,899 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:21,901 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:21,902 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:21,903 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:21,904 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:21,905 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:21,907 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:21,908 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:21,909 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 113 [2019-01-20 10:11:21,910 INFO L267 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2019-01-20 10:11:21,967 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:22,026 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:22,086 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:22,149 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:22,211 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:22,275 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:22,374 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. [2019-01-20 10:11:22,375 INFO L202 ElimStorePlain]: Needed 16 recursive calls to eliminate 7 variables, input treesize:147, output treesize:153 [2019-01-20 10:11:22,422 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:22,423 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 159 [2019-01-20 10:11:22,424 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-20 10:11:22,536 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-20 10:11:22,536 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:163, output treesize:125 [2019-01-20 10:11:22,605 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:22,628 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:22,629 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:22,630 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:22,630 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:22,631 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:22,632 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:22,633 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:22,634 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:22,635 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:22,636 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 31 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 175 [2019-01-20 10:11:22,637 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-20 10:11:22,739 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 1 dim-1 vars, End of recursive call: 7 dim-0 vars, and 1 xjuncts. [2019-01-20 10:11:22,739 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:137, output treesize:103 [2019-01-20 10:11:22,820 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-20 10:11:22,821 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-20 10:11:22,876 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-20 10:11:22,897 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-20 10:11:22,897 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 8 [2019-01-20 10:11:22,897 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-20 10:11:22,897 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-20 10:11:22,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-20 10:11:22,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2019-01-20 10:11:22,898 INFO L87 Difference]: Start difference. First operand 44 states and 175 transitions. Second operand 8 states. [2019-01-20 10:11:26,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-20 10:11:26,641 INFO L93 Difference]: Finished difference Result 99 states and 274 transitions. [2019-01-20 10:11:26,641 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-01-20 10:11:26,642 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-20 10:11:26,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-20 10:11:26,643 INFO L225 Difference]: With dead ends: 99 [2019-01-20 10:11:26,643 INFO L226 Difference]: Without dead ends: 95 [2019-01-20 10:11:26,644 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2019-01-20 10:11:26,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2019-01-20 10:11:26,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 52. [2019-01-20 10:11:26,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-01-20 10:11:26,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 210 transitions. [2019-01-20 10:11:26,656 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 210 transitions. Word has length 4 [2019-01-20 10:11:26,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-20 10:11:26,657 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 210 transitions. [2019-01-20 10:11:26,657 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-20 10:11:26,657 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 210 transitions. [2019-01-20 10:11:26,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-20 10:11:26,658 INFO L394 BasicCegarLoop]: Found error trace [2019-01-20 10:11:26,658 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-20 10:11:26,658 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-01-20 10:11:26,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-20 10:11:26,658 INFO L82 PathProgramCache]: Analyzing trace with hash 941536, now seen corresponding path program 1 times [2019-01-20 10:11:26,658 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-20 10:11:26,659 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-20 10:11:26,659 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-20 10:11:26,659 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-20 10:11:26,660 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-20 10:11:26,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-20 10:11:26,777 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-20 10:11:26,777 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-20 10:11:26,777 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-20 10:11:26,777 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-20 10:11:26,777 INFO L207 CegarAbsIntRunner]: [0], [18], [22], [35] [2019-01-20 10:11:26,778 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-20 10:11:26,778 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-20 10:11:26,782 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-20 10:11:26,782 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 86 root evaluator evaluations with a maximum evaluation depth of 2. Performed 86 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-20 10:11:26,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-20 10:11:26,783 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-20 10:11:26,783 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-20 10:11:26,783 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 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 [2019-01-20 10:11:26,795 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-20 10:11:26,795 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-20 10:11:26,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-20 10:11:26,812 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-20 10:11:26,850 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 27 treesize of output 30 [2019-01-20 10:11:26,855 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 30 treesize of output 36 [2019-01-20 10:11:26,860 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:26,861 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:26,862 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 32 treesize of output 46 [2019-01-20 10:11:26,904 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:26,925 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:26,927 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:26,927 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 34 treesize of output 60 [2019-01-20 10:11:26,931 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:26,931 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:26,933 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:26,934 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:26,935 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 36 treesize of output 78 [2019-01-20 10:11:26,939 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:26,940 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:26,940 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:26,941 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:26,942 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:26,943 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-20 10:11:26,948 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:26,949 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:26,950 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:26,952 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:26,953 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:26,954 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:26,955 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-20 10:11:26,973 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2019-01-20 10:11:26,974 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-01-20 10:11:27,033 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:27,079 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:27,117 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:27,147 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:27,172 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:27,193 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:27,212 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:27,258 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:27,259 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 91 treesize of output 91 [2019-01-20 10:11:27,307 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:27,309 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:27,309 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 78 treesize of output 84 [2019-01-20 10:11:27,360 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:27,361 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:27,362 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:27,363 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:27,364 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 63 treesize of output 86 [2019-01-20 10:11:27,421 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:27,423 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:27,424 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:27,425 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:27,426 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:27,428 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:27,429 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 51 treesize of output 91 [2019-01-20 10:11:27,501 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:27,503 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:27,504 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:27,505 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:27,506 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:27,507 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:27,509 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:27,510 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:27,511 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-01-20 10:11:27,606 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:27,607 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:27,609 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:27,610 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:27,611 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:27,612 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:27,613 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:27,614 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:27,616 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:27,617 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:27,618 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-01-20 10:11:27,619 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-20 10:11:27,657 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:27,696 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:27,738 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:27,781 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:27,823 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:27,896 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. [2019-01-20 10:11:27,896 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 7 variables, input treesize:121, output treesize:125 [2019-01-20 10:11:27,944 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:27,945 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 120 [2019-01-20 10:11:27,945 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-20 10:11:28,012 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. [2019-01-20 10:11:28,012 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:130, output treesize:96 [2019-01-20 10:11:28,245 WARN L181 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2019-01-20 10:11:28,288 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:28,313 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:28,344 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:28,365 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:28,390 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:28,417 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:28,442 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:28,457 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:28,482 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:28,482 INFO L303 Elim1Store]: Index analysis took 233 ms [2019-01-20 10:11:28,483 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 24 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 134 [2019-01-20 10:11:28,484 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-20 10:11:29,108 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-20 10:11:29,108 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:108, output treesize:78 [2019-01-20 10:11:29,283 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-20 10:11:29,284 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-20 10:11:29,306 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-20 10:11:29,325 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-20 10:11:29,325 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-20 10:11:29,326 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-20 10:11:29,326 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-20 10:11:29,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-20 10:11:29,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2019-01-20 10:11:29,326 INFO L87 Difference]: Start difference. First operand 52 states and 210 transitions. Second operand 8 states. [2019-01-20 10:11:29,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-20 10:11:29,841 INFO L93 Difference]: Finished difference Result 101 states and 289 transitions. [2019-01-20 10:11:29,842 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-20 10:11:29,842 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-20 10:11:29,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-20 10:11:29,843 INFO L225 Difference]: With dead ends: 101 [2019-01-20 10:11:29,843 INFO L226 Difference]: Without dead ends: 99 [2019-01-20 10:11:29,844 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2019-01-20 10:11:29,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2019-01-20 10:11:29,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 59. [2019-01-20 10:11:29,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-01-20 10:11:29,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 243 transitions. [2019-01-20 10:11:29,858 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 243 transitions. Word has length 4 [2019-01-20 10:11:29,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-20 10:11:29,859 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 243 transitions. [2019-01-20 10:11:29,859 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-20 10:11:29,859 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 243 transitions. [2019-01-20 10:11:29,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-20 10:11:29,860 INFO L394 BasicCegarLoop]: Found error trace [2019-01-20 10:11:29,860 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-20 10:11:29,860 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-01-20 10:11:29,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-20 10:11:29,860 INFO L82 PathProgramCache]: Analyzing trace with hash 941164, now seen corresponding path program 1 times [2019-01-20 10:11:29,861 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-20 10:11:29,861 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-20 10:11:29,861 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-20 10:11:29,861 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-20 10:11:29,862 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-20 10:11:29,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-20 10:11:29,967 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-20 10:11:29,968 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-20 10:11:29,968 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-20 10:11:29,968 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-20 10:11:29,969 INFO L207 CegarAbsIntRunner]: [0], [10], [18], [35] [2019-01-20 10:11:29,972 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-20 10:11:29,972 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-20 10:11:29,977 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-20 10:11:29,978 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 86 root evaluator evaluations with a maximum evaluation depth of 2. Performed 86 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-20 10:11:29,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-20 10:11:29,978 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-20 10:11:29,978 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-20 10:11:29,978 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 [2019-01-20 10:11:29,987 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-20 10:11:29,987 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-20 10:11:29,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-20 10:11:29,994 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-20 10:11:30,022 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:30,023 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 91 treesize of output 91 [2019-01-20 10:11:30,071 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:30,072 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:30,073 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 78 treesize of output 84 [2019-01-20 10:11:30,123 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:30,124 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:30,126 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:30,127 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:30,128 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 63 treesize of output 86 [2019-01-20 10:11:30,187 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:30,188 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:30,190 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:30,191 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:30,192 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:30,193 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:30,194 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 51 treesize of output 91 [2019-01-20 10:11:30,269 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:30,270 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:30,271 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:30,271 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:30,273 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:30,274 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:30,275 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:30,276 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:30,277 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-01-20 10:11:30,382 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:30,383 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:30,384 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:30,385 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:30,386 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:30,387 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:30,388 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:30,390 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:30,391 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:30,392 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:30,393 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-01-20 10:11:30,394 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-20 10:11:30,433 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:30,476 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:30,520 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:30,564 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:30,610 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:30,663 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-20 10:11:30,667 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 11 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-20 10:11:30,670 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 15 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-20 10:11:30,674 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-20 10:11:30,677 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 20 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-20 10:11:30,699 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 21 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-20 10:11:30,717 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-20 10:11:30,836 INFO L303 Elim1Store]: Index analysis took 117 ms [2019-01-20 10:11:30,837 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2019-01-20 10:11:30,838 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-20 10:11:30,896 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:30,938 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:30,972 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:30,998 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:31,018 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:31,036 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:31,053 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:31,127 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. [2019-01-20 10:11:31,127 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 7 variables, input treesize:121, output treesize:125 [2019-01-20 10:11:31,176 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:31,177 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 120 [2019-01-20 10:11:31,177 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-20 10:11:31,243 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. [2019-01-20 10:11:31,243 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:130, output treesize:96 [2019-01-20 10:11:31,269 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:31,269 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:31,270 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:31,271 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:31,272 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:31,273 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:31,274 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:31,275 INFO L683 Elim1Store]: detected equality via solver [2019-01-20 10:11:31,276 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 135 [2019-01-20 10:11:31,277 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-20 10:11:31,354 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-20 10:11:31,354 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:108, output treesize:80 [2019-01-20 10:11:31,381 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-20 10:11:31,381 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-20 10:11:31,407 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-20 10:11:31,426 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-20 10:11:31,426 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-20 10:11:31,426 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-20 10:11:31,426 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-20 10:11:31,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-20 10:11:31,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2019-01-20 10:11:31,427 INFO L87 Difference]: Start difference. First operand 59 states and 243 transitions. Second operand 8 states. [2019-01-20 10:11:31,944 WARN L181 SmtUtils]: Spent 369.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 66 [2019-01-20 10:11:32,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-20 10:11:32,563 INFO L93 Difference]: Finished difference Result 99 states and 302 transitions. [2019-01-20 10:11:32,563 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-20 10:11:32,563 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-20 10:11:32,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-20 10:11:32,564 INFO L225 Difference]: With dead ends: 99 [2019-01-20 10:11:32,564 INFO L226 Difference]: Without dead ends: 98 [2019-01-20 10:11:32,565 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2019-01-20 10:11:32,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2019-01-20 10:11:32,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 61. [2019-01-20 10:11:32,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-01-20 10:11:32,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 261 transitions. [2019-01-20 10:11:32,578 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 261 transitions. Word has length 4 [2019-01-20 10:11:32,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-20 10:11:32,578 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 261 transitions. [2019-01-20 10:11:32,578 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-20 10:11:32,579 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 261 transitions. [2019-01-20 10:11:32,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-20 10:11:32,579 INFO L394 BasicCegarLoop]: Found error trace [2019-01-20 10:11:32,579 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-20 10:11:32,580 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-01-20 10:11:32,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-20 10:11:32,580 INFO L82 PathProgramCache]: Analyzing trace with hash 941660, now seen corresponding path program 1 times [2019-01-20 10:11:32,580 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-20 10:11:32,581 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-20 10:11:32,581 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-20 10:11:32,581 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-20 10:11:32,581 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-20 10:11:32,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-20 10:11:32,910 WARN L181 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 16 [2019-01-20 10:11:33,137 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-20 10:11:33,137 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-20 10:11:33,138 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-20 10:11:33,138 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-20 10:11:33,138 INFO L207 CegarAbsIntRunner]: [0], [18], [26], [35] [2019-01-20 10:11:33,144 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-20 10:11:33,144 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-20 10:11:33,148 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-20 10:11:33,148 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 86 root evaluator evaluations with a maximum evaluation depth of 2. Performed 86 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-20 10:11:33,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-20 10:11:33,152 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-20 10:11:33,152 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-20 10:11:33,152 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 [2019-01-20 10:11:33,176 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-20 10:11:33,176 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-20 10:11:33,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-20 10:11:33,197 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-20 10:11:33,278 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 27 treesize of output 30 [2019-01-20 10:11:33,282 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 30 treesize of output 36 [2019-01-20 10:11:33,285 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:33,286 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:33,287 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 32 treesize of output 46 [2019-01-20 10:11:33,292 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:33,292 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:33,293 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:33,294 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 34 treesize of output 60 [2019-01-20 10:11:33,298 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:33,300 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:33,301 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:33,303 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:33,304 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 36 treesize of output 78 [2019-01-20 10:11:33,309 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:33,310 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:33,313 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:33,315 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:33,316 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:33,316 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-20 10:11:33,320 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:33,322 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:33,324 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:33,326 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:33,328 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:33,330 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:33,331 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-20 10:11:33,347 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2019-01-20 10:11:33,348 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-01-20 10:11:33,404 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:33,450 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:33,488 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:33,519 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:33,544 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:33,562 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:33,602 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:33,647 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:33,648 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 91 treesize of output 91 [2019-01-20 10:11:33,695 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:33,696 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:33,697 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 78 treesize of output 84 [2019-01-20 10:11:33,742 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:33,743 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:33,745 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:33,746 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:33,747 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 63 treesize of output 86 [2019-01-20 10:11:33,805 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:33,807 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:33,808 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:33,809 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:33,810 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:33,811 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:33,812 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 51 treesize of output 91 [2019-01-20 10:11:33,914 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:33,915 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:33,916 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:33,917 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:33,917 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:33,918 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:33,919 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:33,920 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:33,921 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-01-20 10:11:34,015 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:34,016 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:34,018 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:34,019 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:34,020 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:34,021 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:34,022 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:34,023 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:34,024 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:34,026 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:34,027 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-01-20 10:11:34,027 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-20 10:11:34,072 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:34,113 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:34,152 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:34,194 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:34,236 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:34,309 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. [2019-01-20 10:11:34,310 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 7 variables, input treesize:121, output treesize:125 [2019-01-20 10:11:34,367 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:34,368 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 120 [2019-01-20 10:11:34,368 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-20 10:11:34,441 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. [2019-01-20 10:11:34,442 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:130, output treesize:96 [2019-01-20 10:11:34,679 WARN L181 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2019-01-20 10:11:34,725 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:34,742 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:34,755 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:34,777 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:34,800 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:34,821 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:34,834 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:34,847 INFO L683 Elim1Store]: detected equality via solver [2019-01-20 10:11:34,848 INFO L303 Elim1Store]: Index analysis took 161 ms [2019-01-20 10:11:34,849 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 135 [2019-01-20 10:11:34,852 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-20 10:11:35,606 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-20 10:11:35,607 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:108, output treesize:80 [2019-01-20 10:11:35,794 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-20 10:11:35,794 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-20 10:11:36,189 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-20 10:11:36,226 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-20 10:11:36,227 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-20 10:11:36,227 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-20 10:11:36,227 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-20 10:11:36,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-20 10:11:36,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2019-01-20 10:11:36,228 INFO L87 Difference]: Start difference. First operand 61 states and 261 transitions. Second operand 8 states. [2019-01-20 10:11:37,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-20 10:11:37,021 INFO L93 Difference]: Finished difference Result 101 states and 320 transitions. [2019-01-20 10:11:37,022 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-20 10:11:37,022 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-20 10:11:37,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-20 10:11:37,023 INFO L225 Difference]: With dead ends: 101 [2019-01-20 10:11:37,023 INFO L226 Difference]: Without dead ends: 99 [2019-01-20 10:11:37,024 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2019-01-20 10:11:37,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2019-01-20 10:11:37,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 62. [2019-01-20 10:11:37,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-01-20 10:11:37,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 278 transitions. [2019-01-20 10:11:37,038 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 278 transitions. Word has length 4 [2019-01-20 10:11:37,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-20 10:11:37,039 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 278 transitions. [2019-01-20 10:11:37,039 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-20 10:11:37,039 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 278 transitions. [2019-01-20 10:11:37,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-20 10:11:37,039 INFO L394 BasicCegarLoop]: Found error trace [2019-01-20 10:11:37,040 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-20 10:11:37,040 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-01-20 10:11:37,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-20 10:11:37,040 INFO L82 PathProgramCache]: Analyzing trace with hash 941288, now seen corresponding path program 1 times [2019-01-20 10:11:37,040 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-20 10:11:37,041 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-20 10:11:37,041 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-20 10:11:37,041 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-20 10:11:37,041 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-20 10:11:37,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-20 10:11:37,125 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-20 10:11:37,126 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-20 10:11:37,126 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-20 10:11:37,126 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-20 10:11:37,126 INFO L207 CegarAbsIntRunner]: [0], [14], [18], [35] [2019-01-20 10:11:37,127 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-20 10:11:37,127 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-20 10:11:37,131 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-20 10:11:37,131 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 86 root evaluator evaluations with a maximum evaluation depth of 2. Performed 86 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-20 10:11:37,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-20 10:11:37,131 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-20 10:11:37,132 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-20 10:11:37,132 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 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 [2019-01-20 10:11:37,146 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-20 10:11:37,146 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-20 10:11:37,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-20 10:11:37,153 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-20 10:11:37,243 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:37,243 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 91 treesize of output 91 [2019-01-20 10:11:37,292 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:37,292 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:37,293 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 78 treesize of output 84 [2019-01-20 10:11:37,344 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:37,345 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:37,347 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:37,348 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:37,349 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-01-20 10:11:37,411 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:37,412 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:37,414 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:37,415 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:37,416 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:37,417 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:37,418 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 51 treesize of output 91 [2019-01-20 10:11:37,535 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:37,558 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:37,575 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:37,576 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:37,577 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:37,577 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:37,578 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:37,579 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:37,580 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-01-20 10:11:37,700 WARN L181 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 47 [2019-01-20 10:11:37,705 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:37,706 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:37,707 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:37,707 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:37,709 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:37,710 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:37,711 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:37,712 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:37,713 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:37,715 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:37,716 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-01-20 10:11:37,716 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-20 10:11:37,757 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:37,800 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:37,844 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:37,888 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:37,933 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:37,990 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 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 27 treesize of output 30 [2019-01-20 10:11:37,994 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 11 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-20 10:11:37,997 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 15 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-20 10:11:38,000 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-20 10:11:38,004 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 20 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-20 10:11:38,017 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 21 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-20 10:11:38,020 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-20 10:11:38,031 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2019-01-20 10:11:38,032 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-20 10:11:38,099 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:38,142 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:38,174 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:38,201 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:38,222 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:38,238 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:38,255 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:38,329 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. [2019-01-20 10:11:38,329 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 7 variables, input treesize:121, output treesize:125 [2019-01-20 10:11:38,390 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:38,391 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 120 [2019-01-20 10:11:38,391 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-20 10:11:38,456 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. [2019-01-20 10:11:38,457 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:130, output treesize:96 [2019-01-20 10:11:38,484 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:38,484 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:38,485 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:38,487 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:38,488 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:38,489 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:38,490 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:38,491 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:38,492 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:38,493 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 24 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 142 [2019-01-20 10:11:38,494 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-20 10:11:38,564 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-20 10:11:38,564 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:108, output treesize:78 [2019-01-20 10:11:38,586 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-20 10:11:38,586 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-20 10:11:38,608 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-20 10:11:38,627 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-20 10:11:38,628 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-20 10:11:38,628 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-20 10:11:38,628 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-20 10:11:38,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-20 10:11:38,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2019-01-20 10:11:38,628 INFO L87 Difference]: Start difference. First operand 62 states and 278 transitions. Second operand 8 states. [2019-01-20 10:11:39,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-20 10:11:39,268 INFO L93 Difference]: Finished difference Result 106 states and 350 transitions. [2019-01-20 10:11:39,269 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-20 10:11:39,269 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-20 10:11:39,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-20 10:11:39,271 INFO L225 Difference]: With dead ends: 106 [2019-01-20 10:11:39,271 INFO L226 Difference]: Without dead ends: 104 [2019-01-20 10:11:39,272 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2019-01-20 10:11:39,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2019-01-20 10:11:39,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 65. [2019-01-20 10:11:39,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2019-01-20 10:11:39,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 304 transitions. [2019-01-20 10:11:39,287 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 304 transitions. Word has length 4 [2019-01-20 10:11:39,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-20 10:11:39,287 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 304 transitions. [2019-01-20 10:11:39,287 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-20 10:11:39,288 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 304 transitions. [2019-01-20 10:11:39,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-20 10:11:39,288 INFO L394 BasicCegarLoop]: Found error trace [2019-01-20 10:11:39,288 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-20 10:11:39,289 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-01-20 10:11:39,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-20 10:11:39,289 INFO L82 PathProgramCache]: Analyzing trace with hash 941784, now seen corresponding path program 1 times [2019-01-20 10:11:39,289 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-20 10:11:39,290 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-20 10:11:39,290 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-20 10:11:39,290 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-20 10:11:39,290 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-20 10:11:39,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-20 10:11:39,362 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-20 10:11:39,362 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-20 10:11:39,362 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-20 10:11:39,362 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-20 10:11:39,363 INFO L207 CegarAbsIntRunner]: [0], [18], [30], [35] [2019-01-20 10:11:39,365 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-20 10:11:39,365 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-20 10:11:39,371 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-20 10:11:39,371 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 86 root evaluator evaluations with a maximum evaluation depth of 2. Performed 86 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-20 10:11:39,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-20 10:11:39,371 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-20 10:11:39,371 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-20 10:11:39,372 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 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 [2019-01-20 10:11:39,380 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-20 10:11:39,380 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-20 10:11:39,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-20 10:11:39,394 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-20 10:11:39,452 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-20 10:11:39,454 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 30 treesize of output 36 [2019-01-20 10:11:39,457 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:39,458 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:39,459 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-20 10:11:39,464 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:39,465 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:39,466 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:39,467 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 34 treesize of output 60 [2019-01-20 10:11:39,471 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:39,472 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:39,473 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:39,474 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:39,475 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-20 10:11:39,480 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:39,481 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:39,482 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:39,483 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:39,505 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:39,506 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-20 10:11:39,509 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:39,510 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:39,511 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:39,512 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:39,514 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:39,515 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:39,516 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-20 10:11:39,529 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2019-01-20 10:11:39,529 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-01-20 10:11:39,593 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:39,642 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:39,679 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:39,707 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:39,732 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:39,751 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:39,768 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:39,809 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:39,809 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 91 treesize of output 91 [2019-01-20 10:11:39,856 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:39,858 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:39,859 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 78 treesize of output 84 [2019-01-20 10:11:39,910 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:39,912 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:39,913 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:39,914 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:39,915 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-01-20 10:11:39,974 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:39,975 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:39,976 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:39,977 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:39,978 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:39,980 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:39,981 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 51 treesize of output 91 [2019-01-20 10:11:40,057 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:40,058 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:40,059 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:40,061 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:40,062 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:40,063 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:40,064 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:40,065 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:40,066 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-01-20 10:11:40,165 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:40,166 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:40,167 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:40,169 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:40,170 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:40,171 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:40,172 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:40,173 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:40,174 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:40,175 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:40,176 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-01-20 10:11:40,177 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-20 10:11:40,217 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:40,258 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:40,304 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:40,344 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:40,386 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:40,459 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. [2019-01-20 10:11:40,460 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 7 variables, input treesize:121, output treesize:125 [2019-01-20 10:11:40,526 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:40,527 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 120 [2019-01-20 10:11:40,528 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-20 10:11:40,594 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. [2019-01-20 10:11:40,595 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:130, output treesize:96 [2019-01-20 10:11:40,675 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:40,698 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:40,720 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:40,741 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:40,763 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:40,788 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:40,801 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:40,826 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:40,843 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:40,843 INFO L303 Elim1Store]: Index analysis took 222 ms [2019-01-20 10:11:40,844 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 24 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 142 [2019-01-20 10:11:40,845 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-20 10:11:40,934 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-20 10:11:40,934 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:108, output treesize:78 [2019-01-20 10:11:40,965 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-20 10:11:40,965 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-20 10:11:40,987 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-20 10:11:41,006 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-20 10:11:41,007 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-20 10:11:41,007 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-20 10:11:41,007 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-20 10:11:41,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-20 10:11:41,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2019-01-20 10:11:41,008 INFO L87 Difference]: Start difference. First operand 65 states and 304 transitions. Second operand 8 states. [2019-01-20 10:11:41,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-20 10:11:41,707 INFO L93 Difference]: Finished difference Result 107 states and 376 transitions. [2019-01-20 10:11:41,707 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-20 10:11:41,707 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-20 10:11:41,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-20 10:11:41,709 INFO L225 Difference]: With dead ends: 107 [2019-01-20 10:11:41,709 INFO L226 Difference]: Without dead ends: 99 [2019-01-20 10:11:41,710 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 [2019-01-20 10:11:41,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2019-01-20 10:11:41,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 66. [2019-01-20 10:11:41,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-01-20 10:11:41,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 328 transitions. [2019-01-20 10:11:41,724 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 328 transitions. Word has length 4 [2019-01-20 10:11:41,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-20 10:11:41,724 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 328 transitions. [2019-01-20 10:11:41,724 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-20 10:11:41,724 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 328 transitions. [2019-01-20 10:11:41,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-20 10:11:41,725 INFO L394 BasicCegarLoop]: Found error trace [2019-01-20 10:11:41,725 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-20 10:11:41,725 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-01-20 10:11:41,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-20 10:11:41,725 INFO L82 PathProgramCache]: Analyzing trace with hash 930314, now seen corresponding path program 1 times [2019-01-20 10:11:41,726 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-20 10:11:41,726 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-20 10:11:41,726 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-20 10:11:41,727 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-20 10:11:41,727 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-20 10:11:41,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-20 10:11:41,811 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-20 10:11:41,811 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-20 10:11:41,811 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-20 10:11:41,811 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-20 10:11:41,811 INFO L207 CegarAbsIntRunner]: [0], [6], [32], [35] [2019-01-20 10:11:41,812 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-20 10:11:41,813 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-20 10:11:41,817 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-20 10:11:41,817 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 86 root evaluator evaluations with a maximum evaluation depth of 2. Performed 86 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-20 10:11:41,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-20 10:11:41,818 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-20 10:11:41,818 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-20 10:11:41,818 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 [2019-01-20 10:11:41,827 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-20 10:11:41,827 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-20 10:11:41,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-20 10:11:41,835 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-20 10:11:41,863 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:41,864 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-01-20 10:11:41,906 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:41,907 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:41,908 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-01-20 10:11:41,958 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:41,959 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:41,960 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:41,961 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:41,962 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-01-20 10:11:42,024 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:42,025 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:42,026 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:42,028 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:42,029 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:42,030 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:42,031 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 51 treesize of output 91 [2019-01-20 10:11:42,108 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:42,109 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:42,109 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:42,111 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:42,112 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:42,113 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:42,114 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:42,115 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:42,116 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-01-20 10:11:42,208 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:42,209 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:42,210 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:42,211 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:42,213 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:42,214 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:42,215 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:42,216 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:42,217 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:42,219 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:42,219 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-01-20 10:11:42,220 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-20 10:11:42,264 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:42,308 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:42,353 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:42,400 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:42,444 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:42,499 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 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 27 treesize of output 30 [2019-01-20 10:11:42,503 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 11 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-20 10:11:42,506 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 15 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-20 10:11:42,510 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-20 10:11:42,513 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 20 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-20 10:11:42,517 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 21 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-20 10:11:42,527 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-20 10:11:42,539 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2019-01-20 10:11:42,540 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-20 10:11:42,598 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:42,706 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:42,834 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:42,860 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:42,882 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:42,900 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:42,917 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:42,990 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 2 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-20 10:11:42,990 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 8 variables, input treesize:121, output treesize:125 [2019-01-20 10:11:43,024 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:43,035 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 22 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 51 treesize of output 135 [2019-01-20 10:11:43,036 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-01-20 10:11:43,273 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 12 dim-0 vars, and 2 xjuncts. [2019-01-20 10:11:43,273 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:135, output treesize:201 [2019-01-20 10:11:43,381 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:43,384 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:43,390 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:43,392 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:43,394 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:43,396 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:43,398 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:43,400 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:43,402 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:43,403 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:43,452 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 25 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 12 case distinctions, treesize of input 111 treesize of output 165 [2019-01-20 10:11:43,453 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2019-01-20 10:11:43,470 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 64 xjuncts. [2019-01-20 10:11:44,546 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:44,547 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:44,548 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:44,549 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:44,549 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:44,551 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:44,555 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:44,556 INFO L683 Elim1Store]: detected equality via solver [2019-01-20 10:11:44,556 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 126 [2019-01-20 10:11:44,557 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-01-20 10:11:44,988 INFO L267 ElimStorePlain]: Start of recursive call 1: 13 dim-0 vars, 2 dim-1 vars, End of recursive call: 49 dim-0 vars, and 8 xjuncts. [2019-01-20 10:11:44,989 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 15 variables, input treesize:218, output treesize:686 [2019-01-20 10:11:45,893 WARN L181 SmtUtils]: Spent 375.00 ms on a formula simplification. DAG size of input: 385 DAG size of output: 114 [2019-01-20 10:11:45,894 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-20 10:11:45,895 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-20 10:11:45,902 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-20 10:11:45,921 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-20 10:11:45,922 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2019-01-20 10:11:45,922 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-20 10:11:45,922 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-20 10:11:45,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-20 10:11:45,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2019-01-20 10:11:45,922 INFO L87 Difference]: Start difference. First operand 66 states and 328 transitions. Second operand 8 states. [2019-01-20 10:11:46,719 WARN L181 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 117 [2019-01-20 10:11:49,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-20 10:11:49,681 INFO L93 Difference]: Finished difference Result 155 states and 556 transitions. [2019-01-20 10:11:49,685 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-01-20 10:11:49,685 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-20 10:11:49,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-20 10:11:49,686 INFO L225 Difference]: With dead ends: 155 [2019-01-20 10:11:49,686 INFO L226 Difference]: Without dead ends: 152 [2019-01-20 10:11:49,687 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2019-01-20 10:11:49,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2019-01-20 10:11:49,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 78. [2019-01-20 10:11:49,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2019-01-20 10:11:49,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 438 transitions. [2019-01-20 10:11:49,707 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 438 transitions. Word has length 4 [2019-01-20 10:11:49,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-20 10:11:49,707 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 438 transitions. [2019-01-20 10:11:49,707 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-20 10:11:49,708 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 438 transitions. [2019-01-20 10:11:49,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-20 10:11:49,709 INFO L394 BasicCegarLoop]: Found error trace [2019-01-20 10:11:49,709 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-20 10:11:49,709 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-01-20 10:11:49,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-20 10:11:49,710 INFO L82 PathProgramCache]: Analyzing trace with hash 930440, now seen corresponding path program 1 times [2019-01-20 10:11:49,710 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-20 10:11:49,710 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-20 10:11:49,711 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-20 10:11:49,711 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-20 10:11:49,711 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-20 10:11:49,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-20 10:11:49,918 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-20 10:11:49,918 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-20 10:11:49,918 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-20 10:11:49,918 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-20 10:11:49,919 INFO L207 CegarAbsIntRunner]: [0], [6], [36], [37] [2019-01-20 10:11:49,919 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-20 10:11:49,920 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-20 10:11:49,925 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-20 10:11:49,925 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 86 root evaluator evaluations with a maximum evaluation depth of 2. Performed 86 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2019-01-20 10:11:49,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-20 10:11:49,925 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-20 10:11:49,925 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-20 10:11:49,926 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 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 [2019-01-20 10:11:49,940 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-20 10:11:49,940 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-20 10:11:49,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-20 10:11:49,947 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-20 10:11:49,974 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 27 treesize of output 30 [2019-01-20 10:11:49,978 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 30 treesize of output 36 [2019-01-20 10:11:49,984 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:49,985 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:49,985 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 32 treesize of output 46 [2019-01-20 10:11:49,991 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:49,992 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:49,993 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:49,993 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 34 treesize of output 60 [2019-01-20 10:11:49,998 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:49,999 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:50,001 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:50,002 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:50,003 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 36 treesize of output 78 [2019-01-20 10:11:50,008 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:50,009 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:50,011 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:50,012 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:50,013 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:50,013 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-20 10:11:50,019 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:50,021 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:50,023 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:50,024 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:50,026 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:50,028 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:50,029 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-20 10:11:50,039 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2019-01-20 10:11:50,040 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-01-20 10:11:50,101 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:50,149 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:50,187 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:50,216 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:50,241 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:50,261 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:50,280 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:50,327 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:50,327 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 91 treesize of output 91 [2019-01-20 10:11:50,373 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:50,374 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:50,375 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 78 treesize of output 84 [2019-01-20 10:11:50,424 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:50,425 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:50,426 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:50,427 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:50,428 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 63 treesize of output 86 [2019-01-20 10:11:50,486 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:50,487 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:50,488 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:50,489 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:50,489 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:50,490 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:50,491 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 51 treesize of output 91 [2019-01-20 10:11:50,566 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:50,567 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:50,568 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:50,569 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:50,570 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:50,572 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:50,573 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:50,574 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:50,575 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-01-20 10:11:50,670 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:50,671 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:50,672 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:50,672 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:50,673 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:50,674 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:50,675 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:50,677 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:50,678 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:50,679 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:50,680 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-01-20 10:11:50,680 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-20 10:11:50,718 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:50,759 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:50,800 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:50,842 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:50,884 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:50,958 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 2 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-20 10:11:50,958 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 8 variables, input treesize:121, output treesize:125 [2019-01-20 10:11:51,033 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:51,034 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 126 [2019-01-20 10:11:51,035 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-20 10:11:51,100 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-20 10:11:51,101 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:130, output treesize:96 [2019-01-20 10:11:51,123 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-20 10:11:51,124 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-20 10:11:51,133 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-20 10:11:51,151 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-20 10:11:51,151 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-01-20 10:11:51,152 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-20 10:11:51,152 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-01-20 10:11:51,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-01-20 10:11:51,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-01-20 10:11:51,152 INFO L87 Difference]: Start difference. First operand 78 states and 438 transitions. Second operand 6 states. [2019-01-20 10:11:51,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-20 10:11:51,505 INFO L93 Difference]: Finished difference Result 104 states and 471 transitions. [2019-01-20 10:11:51,505 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-01-20 10:11:51,505 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 4 [2019-01-20 10:11:51,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-20 10:11:51,507 INFO L225 Difference]: With dead ends: 104 [2019-01-20 10:11:51,507 INFO L226 Difference]: Without dead ends: 103 [2019-01-20 10:11:51,508 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2019-01-20 10:11:51,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2019-01-20 10:11:51,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 80. [2019-01-20 10:11:51,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2019-01-20 10:11:51,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 448 transitions. [2019-01-20 10:11:51,522 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 448 transitions. Word has length 4 [2019-01-20 10:11:51,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-20 10:11:51,522 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 448 transitions. [2019-01-20 10:11:51,522 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-01-20 10:11:51,522 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 448 transitions. [2019-01-20 10:11:51,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-20 10:11:51,522 INFO L394 BasicCegarLoop]: Found error trace [2019-01-20 10:11:51,522 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-20 10:11:51,523 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-01-20 10:11:51,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-20 10:11:51,523 INFO L82 PathProgramCache]: Analyzing trace with hash 945816, now seen corresponding path program 1 times [2019-01-20 10:11:51,523 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-20 10:11:51,523 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-20 10:11:51,524 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-20 10:11:51,524 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-20 10:11:51,524 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-20 10:11:51,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-20 10:11:51,611 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-20 10:11:51,611 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-20 10:11:51,611 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-20 10:11:51,611 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-20 10:11:51,612 INFO L207 CegarAbsIntRunner]: [0], [22], [36], [37] [2019-01-20 10:11:51,612 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-20 10:11:51,613 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-20 10:11:51,615 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-20 10:11:51,615 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 86 root evaluator evaluations with a maximum evaluation depth of 2. Performed 86 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2019-01-20 10:11:51,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-20 10:11:51,616 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-20 10:11:51,616 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-20 10:11:51,616 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 [2019-01-20 10:11:51,629 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-20 10:11:51,629 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-20 10:11:51,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-20 10:11:51,634 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-20 10:11:51,639 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 27 treesize of output 30 [2019-01-20 10:11:51,644 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2019-01-20 10:11:51,650 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:51,651 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:51,652 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 32 treesize of output 42 [2019-01-20 10:11:51,661 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:51,663 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:51,665 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:51,665 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 34 treesize of output 56 [2019-01-20 10:11:51,670 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:51,672 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:51,674 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:51,675 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:51,676 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 36 treesize of output 74 [2019-01-20 10:11:51,682 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:51,683 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:51,686 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:51,688 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:51,690 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:51,691 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 96 [2019-01-20 10:11:51,696 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:51,698 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:51,700 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:51,704 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:51,705 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:51,707 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:51,708 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 20 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 122 [2019-01-20 10:11:51,721 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 121 [2019-01-20 10:11:51,722 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-01-20 10:11:51,779 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:51,823 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:51,859 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:51,885 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:51,908 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:51,928 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:51,947 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:51,986 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 86 treesize of output 76 [2019-01-20 10:11:52,008 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:52,011 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:52,012 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 73 treesize of output 80 [2019-01-20 10:11:52,055 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:52,056 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:52,058 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:52,059 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:52,060 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 63 treesize of output 82 [2019-01-20 10:11:52,116 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:52,118 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:52,119 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:52,120 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:52,121 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:52,124 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:52,125 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 51 treesize of output 87 [2019-01-20 10:11:52,196 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:52,197 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:52,198 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:52,200 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:52,201 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:52,202 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:52,203 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:52,205 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:52,206 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 101 [2019-01-20 10:11:52,293 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:52,294 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:52,295 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:52,296 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:52,298 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:52,299 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:52,300 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:52,301 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:52,302 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:52,304 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:52,305 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 81 [2019-01-20 10:11:52,306 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-20 10:11:52,342 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:52,381 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:52,420 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:52,459 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:52,501 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:52,571 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 2 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-20 10:11:52,572 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 8 variables, input treesize:113, output treesize:121 [2019-01-20 10:11:52,606 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:52,606 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 122 [2019-01-20 10:11:52,607 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-20 10:11:52,672 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-20 10:11:52,673 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:126, output treesize:92 [2019-01-20 10:11:52,690 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-20 10:11:52,691 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-20 10:11:52,699 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-20 10:11:52,719 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-20 10:11:52,719 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-01-20 10:11:52,719 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-20 10:11:52,719 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-01-20 10:11:52,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-01-20 10:11:52,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-01-20 10:11:52,720 INFO L87 Difference]: Start difference. First operand 80 states and 448 transitions. Second operand 6 states. [2019-01-20 10:11:53,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-20 10:11:53,062 INFO L93 Difference]: Finished difference Result 108 states and 483 transitions. [2019-01-20 10:11:53,063 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-01-20 10:11:53,063 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 4 [2019-01-20 10:11:53,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-20 10:11:53,065 INFO L225 Difference]: With dead ends: 108 [2019-01-20 10:11:53,065 INFO L226 Difference]: Without dead ends: 107 [2019-01-20 10:11:53,065 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 [2019-01-20 10:11:53,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2019-01-20 10:11:53,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 80. [2019-01-20 10:11:53,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2019-01-20 10:11:53,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 448 transitions. [2019-01-20 10:11:53,082 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 448 transitions. Word has length 4 [2019-01-20 10:11:53,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-20 10:11:53,083 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 448 transitions. [2019-01-20 10:11:53,083 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-01-20 10:11:53,083 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 448 transitions. [2019-01-20 10:11:53,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-20 10:11:53,083 INFO L394 BasicCegarLoop]: Found error trace [2019-01-20 10:11:53,083 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-20 10:11:53,084 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-01-20 10:11:53,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-20 10:11:53,084 INFO L82 PathProgramCache]: Analyzing trace with hash 945008, now seen corresponding path program 1 times [2019-01-20 10:11:53,084 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-20 10:11:53,085 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-20 10:11:53,085 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-20 10:11:53,085 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-20 10:11:53,085 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-20 10:11:53,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-20 10:11:53,240 WARN L181 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 21 [2019-01-20 10:11:53,270 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-20 10:11:53,270 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-20 10:11:53,270 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-20 10:11:53,270 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-20 10:11:53,271 INFO L207 CegarAbsIntRunner]: [0], [10], [22], [35] [2019-01-20 10:11:53,272 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-20 10:11:53,272 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-20 10:11:53,275 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-20 10:11:53,276 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 86 root evaluator evaluations with a maximum evaluation depth of 2. Performed 86 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-20 10:11:53,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-20 10:11:53,276 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-20 10:11:53,276 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-20 10:11:53,276 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 [2019-01-20 10:11:53,285 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-20 10:11:53,285 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-20 10:11:53,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-20 10:11:53,293 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-20 10:11:53,321 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:53,322 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 91 treesize of output 91 [2019-01-20 10:11:53,369 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:53,370 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:53,370 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 78 treesize of output 84 [2019-01-20 10:11:53,421 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:53,422 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:53,423 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:53,424 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:53,425 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-01-20 10:11:53,485 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:53,487 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:53,488 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:53,489 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:53,490 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:53,492 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:53,492 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 51 treesize of output 91 [2019-01-20 10:11:53,563 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:53,563 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:53,564 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:53,565 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:53,567 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:53,568 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:53,569 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:53,570 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:53,571 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-01-20 10:11:53,665 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:53,666 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:53,667 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:53,669 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:53,670 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:53,671 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:53,672 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:53,673 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:53,675 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:53,676 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:53,677 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-01-20 10:11:53,677 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-20 10:11:53,720 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:53,760 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:53,802 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:53,844 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:53,889 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:53,938 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 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 27 treesize of output 30 [2019-01-20 10:11:53,942 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 11 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-20 10:11:53,944 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 15 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-20 10:11:53,947 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-20 10:11:53,950 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 20 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-20 10:11:53,954 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 21 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-20 10:11:53,957 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-20 10:11:53,969 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2019-01-20 10:11:53,970 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-20 10:11:54,025 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:54,068 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:54,102 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:54,128 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:54,147 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:54,181 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:54,198 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:54,271 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. [2019-01-20 10:11:54,271 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 7 variables, input treesize:121, output treesize:125 [2019-01-20 10:11:54,322 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:54,323 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 126 [2019-01-20 10:11:54,323 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-20 10:11:54,394 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. [2019-01-20 10:11:54,394 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:130, output treesize:96 [2019-01-20 10:11:54,471 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:54,494 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:54,515 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:54,538 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:54,560 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:54,586 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:54,607 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:54,634 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:54,655 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:54,655 INFO L303 Elim1Store]: Index analysis took 231 ms [2019-01-20 10:11:54,656 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 24 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 140 [2019-01-20 10:11:54,657 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-20 10:11:54,808 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-20 10:11:54,809 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:106, output treesize:76 [2019-01-20 10:11:54,833 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-20 10:11:54,834 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-20 10:11:54,861 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-20 10:11:54,880 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-20 10:11:54,881 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 8 [2019-01-20 10:11:54,881 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-20 10:11:54,881 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-20 10:11:54,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-20 10:11:54,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2019-01-20 10:11:54,882 INFO L87 Difference]: Start difference. First operand 80 states and 448 transitions. Second operand 8 states. [2019-01-20 10:11:56,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-20 10:11:56,884 INFO L93 Difference]: Finished difference Result 154 states and 652 transitions. [2019-01-20 10:11:56,887 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-01-20 10:11:56,887 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-20 10:11:56,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-20 10:11:56,889 INFO L225 Difference]: With dead ends: 154 [2019-01-20 10:11:56,890 INFO L226 Difference]: Without dead ends: 153 [2019-01-20 10:11:56,890 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2019-01-20 10:11:56,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2019-01-20 10:11:56,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 92. [2019-01-20 10:11:56,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2019-01-20 10:11:56,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 556 transitions. [2019-01-20 10:11:56,912 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 556 transitions. Word has length 4 [2019-01-20 10:11:56,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-20 10:11:56,913 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 556 transitions. [2019-01-20 10:11:56,913 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-20 10:11:56,913 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 556 transitions. [2019-01-20 10:11:56,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-20 10:11:56,913 INFO L394 BasicCegarLoop]: Found error trace [2019-01-20 10:11:56,913 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-20 10:11:56,914 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-01-20 10:11:56,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-20 10:11:56,914 INFO L82 PathProgramCache]: Analyzing trace with hash 945504, now seen corresponding path program 1 times [2019-01-20 10:11:56,914 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-20 10:11:56,915 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-20 10:11:56,915 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-20 10:11:56,915 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-20 10:11:56,915 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-20 10:11:56,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-20 10:11:57,033 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-20 10:11:57,033 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-20 10:11:57,033 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-20 10:11:57,033 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-20 10:11:57,034 INFO L207 CegarAbsIntRunner]: [0], [22], [26], [35] [2019-01-20 10:11:57,037 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-20 10:11:57,037 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-20 10:11:57,039 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-20 10:11:57,039 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 86 root evaluator evaluations with a maximum evaluation depth of 2. Performed 86 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-20 10:11:57,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-20 10:11:57,041 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-20 10:11:57,041 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-20 10:11:57,041 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 [2019-01-20 10:11:57,057 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-20 10:11:57,057 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-20 10:11:57,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-20 10:11:57,063 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-20 10:11:57,093 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 27 treesize of output 30 [2019-01-20 10:11:57,097 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 30 treesize of output 36 [2019-01-20 10:11:57,101 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:57,102 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:57,103 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 32 treesize of output 46 [2019-01-20 10:11:57,106 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:57,107 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:57,109 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:57,109 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 34 treesize of output 60 [2019-01-20 10:11:57,112 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:57,113 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:57,114 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:57,115 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:57,116 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 36 treesize of output 78 [2019-01-20 10:11:57,121 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:57,122 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:57,123 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:57,124 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:57,125 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:57,126 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-20 10:11:57,132 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:57,133 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:57,135 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:57,136 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:57,137 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:57,139 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:57,140 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-20 10:11:57,179 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2019-01-20 10:11:57,180 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-01-20 10:11:57,241 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:57,287 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:57,322 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:57,351 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:57,376 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:57,395 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:57,413 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:57,462 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:57,463 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-01-20 10:11:57,508 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:57,509 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:57,510 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 78 treesize of output 84 [2019-01-20 10:11:57,564 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:57,566 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:57,567 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:57,568 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:57,569 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 63 treesize of output 86 [2019-01-20 10:11:57,629 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:57,630 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:57,631 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:57,632 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:57,634 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:57,635 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:57,636 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-01-20 10:11:57,710 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:57,711 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:57,712 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:57,713 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:57,714 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:57,716 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:57,717 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:57,718 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:57,719 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-01-20 10:11:57,812 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:57,813 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:57,815 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:57,816 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:57,817 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:57,818 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:57,819 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:57,820 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:57,821 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:57,823 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:57,823 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-01-20 10:11:57,824 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-20 10:11:57,863 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:57,904 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:57,945 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:57,985 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:58,027 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:58,099 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. [2019-01-20 10:11:58,100 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 7 variables, input treesize:121, output treesize:125 [2019-01-20 10:11:58,150 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:58,150 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 126 [2019-01-20 10:11:58,151 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-20 10:11:58,218 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. [2019-01-20 10:11:58,219 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:130, output treesize:96 [2019-01-20 10:11:58,244 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:58,245 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:58,245 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:58,246 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:58,247 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:58,248 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:58,249 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:58,250 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:58,251 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:58,252 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 24 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 140 [2019-01-20 10:11:58,253 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-20 10:11:58,325 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-20 10:11:58,325 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:106, output treesize:76 [2019-01-20 10:11:58,345 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-20 10:11:58,345 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-20 10:11:58,374 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-20 10:11:58,393 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-20 10:11:58,394 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 8 [2019-01-20 10:11:58,394 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-20 10:11:58,394 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-20 10:11:58,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-20 10:11:58,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2019-01-20 10:11:58,395 INFO L87 Difference]: Start difference. First operand 92 states and 556 transitions. Second operand 8 states. [2019-01-20 10:11:59,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-20 10:11:59,083 INFO L93 Difference]: Finished difference Result 148 states and 688 transitions. [2019-01-20 10:11:59,083 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-01-20 10:11:59,083 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-20 10:11:59,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-20 10:11:59,086 INFO L225 Difference]: With dead ends: 148 [2019-01-20 10:11:59,086 INFO L226 Difference]: Without dead ends: 146 [2019-01-20 10:11:59,086 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2019-01-20 10:11:59,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2019-01-20 10:11:59,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 103. [2019-01-20 10:11:59,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2019-01-20 10:11:59,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 590 transitions. [2019-01-20 10:11:59,105 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 590 transitions. Word has length 4 [2019-01-20 10:11:59,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-20 10:11:59,106 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 590 transitions. [2019-01-20 10:11:59,106 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-20 10:11:59,106 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 590 transitions. [2019-01-20 10:11:59,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-20 10:11:59,106 INFO L394 BasicCegarLoop]: Found error trace [2019-01-20 10:11:59,107 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-20 10:11:59,107 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-01-20 10:11:59,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-20 10:11:59,107 INFO L82 PathProgramCache]: Analyzing trace with hash 933972, now seen corresponding path program 1 times [2019-01-20 10:11:59,107 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-20 10:11:59,108 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-20 10:11:59,108 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-20 10:11:59,108 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-20 10:11:59,108 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-20 10:11:59,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-20 10:11:59,335 WARN L181 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 17 [2019-01-20 10:11:59,365 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-20 10:11:59,366 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-20 10:11:59,366 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-20 10:11:59,366 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-20 10:11:59,366 INFO L207 CegarAbsIntRunner]: [0], [10], [26], [35] [2019-01-20 10:11:59,367 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-20 10:11:59,367 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-20 10:11:59,372 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-20 10:11:59,372 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 86 root evaluator evaluations with a maximum evaluation depth of 2. Performed 86 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-20 10:11:59,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-20 10:11:59,372 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-20 10:11:59,372 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-20 10:11:59,372 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 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 [2019-01-20 10:11:59,380 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-20 10:11:59,380 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-20 10:11:59,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-20 10:11:59,386 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-20 10:11:59,413 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-20 10:11:59,417 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 30 treesize of output 36 [2019-01-20 10:11:59,422 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:59,423 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:59,424 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 32 treesize of output 46 [2019-01-20 10:11:59,427 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:59,427 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:59,428 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:59,429 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 34 treesize of output 60 [2019-01-20 10:11:59,433 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:59,435 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:59,436 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:59,437 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:59,438 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 36 treesize of output 78 [2019-01-20 10:11:59,448 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:59,449 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:59,451 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:59,452 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:59,453 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:59,454 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-20 10:11:59,459 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:59,460 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:59,461 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:59,462 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:59,464 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:59,466 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:59,467 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-20 10:11:59,479 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2019-01-20 10:11:59,480 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-01-20 10:11:59,540 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:59,584 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:59,620 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:59,651 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:59,676 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:59,696 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:59,716 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:59,764 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:59,765 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 91 treesize of output 91 [2019-01-20 10:11:59,807 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:59,808 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:59,809 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 78 treesize of output 84 [2019-01-20 10:11:59,857 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:59,859 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:59,860 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:59,861 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:59,862 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 63 treesize of output 86 [2019-01-20 10:11:59,917 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:59,918 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:59,919 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:59,921 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:59,922 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:59,923 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:59,924 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 51 treesize of output 91 [2019-01-20 10:11:59,999 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:00,001 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:00,002 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:00,003 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:00,004 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:00,005 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:00,007 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:00,008 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:00,009 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-01-20 10:12:00,100 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:00,101 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:00,102 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:00,103 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:00,105 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:00,106 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:00,107 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:00,108 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:00,110 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:00,111 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:00,112 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-01-20 10:12:00,112 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-20 10:12:00,152 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:12:00,191 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:12:00,232 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:12:00,279 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:12:00,322 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:12:00,396 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. [2019-01-20 10:12:00,396 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 7 variables, input treesize:121, output treesize:125 [2019-01-20 10:12:00,452 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:00,453 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 126 [2019-01-20 10:12:00,453 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-20 10:12:00,523 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. [2019-01-20 10:12:00,524 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:130, output treesize:96 [2019-01-20 10:12:00,550 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:00,552 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:00,553 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:00,554 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:00,556 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:00,557 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:00,558 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:00,559 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:00,560 INFO L683 Elim1Store]: detected equality via solver [2019-01-20 10:12:00,561 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 141 [2019-01-20 10:12:00,562 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-20 10:12:00,631 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-20 10:12:00,631 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:108, output treesize:82 [2019-01-20 10:12:00,653 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-20 10:12:00,653 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-20 10:12:00,676 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-20 10:12:00,694 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-20 10:12:00,694 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-20 10:12:00,694 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-20 10:12:00,694 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-20 10:12:00,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-20 10:12:00,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2019-01-20 10:12:00,695 INFO L87 Difference]: Start difference. First operand 103 states and 590 transitions. Second operand 8 states. [2019-01-20 10:12:01,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-20 10:12:01,216 INFO L93 Difference]: Finished difference Result 145 states and 646 transitions. [2019-01-20 10:12:01,216 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-20 10:12:01,216 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-20 10:12:01,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-20 10:12:01,219 INFO L225 Difference]: With dead ends: 145 [2019-01-20 10:12:01,219 INFO L226 Difference]: Without dead ends: 143 [2019-01-20 10:12:01,220 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2019-01-20 10:12:01,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2019-01-20 10:12:01,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 104. [2019-01-20 10:12:01,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2019-01-20 10:12:01,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 599 transitions. [2019-01-20 10:12:01,244 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 599 transitions. Word has length 4 [2019-01-20 10:12:01,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-20 10:12:01,244 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 599 transitions. [2019-01-20 10:12:01,244 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-20 10:12:01,244 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 599 transitions. [2019-01-20 10:12:01,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-20 10:12:01,245 INFO L394 BasicCegarLoop]: Found error trace [2019-01-20 10:12:01,245 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-20 10:12:01,245 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-01-20 10:12:01,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-20 10:12:01,245 INFO L82 PathProgramCache]: Analyzing trace with hash 938128, now seen corresponding path program 1 times [2019-01-20 10:12:01,246 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-20 10:12:01,246 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-20 10:12:01,246 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-20 10:12:01,246 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-20 10:12:01,247 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-20 10:12:01,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-20 10:12:01,324 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-20 10:12:01,325 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-20 10:12:01,325 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-20 10:12:01,325 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-20 10:12:01,325 INFO L207 CegarAbsIntRunner]: [0], [14], [36], [37] [2019-01-20 10:12:01,326 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-20 10:12:01,326 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-20 10:12:01,330 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-20 10:12:01,330 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 86 root evaluator evaluations with a maximum evaluation depth of 2. Performed 86 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2019-01-20 10:12:01,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-20 10:12:01,330 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-20 10:12:01,330 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-20 10:12:01,330 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 [2019-01-20 10:12:01,339 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-20 10:12:01,339 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-20 10:12:01,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-20 10:12:01,345 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-20 10:12:01,350 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 27 treesize of output 30 [2019-01-20 10:12:01,355 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 30 treesize of output 32 [2019-01-20 10:12:01,362 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:01,363 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:01,363 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 32 treesize of output 42 [2019-01-20 10:12:01,368 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:01,369 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:01,371 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:01,372 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 34 treesize of output 56 [2019-01-20 10:12:01,377 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:01,379 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:01,381 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:01,382 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:01,383 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 74 [2019-01-20 10:12:01,388 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:01,390 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:01,394 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:01,396 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:01,398 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:01,399 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 96 [2019-01-20 10:12:01,404 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:01,406 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:01,407 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:01,410 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:01,411 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:01,412 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:01,413 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 20 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 122 [2019-01-20 10:12:01,427 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 121 [2019-01-20 10:12:01,428 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-01-20 10:12:01,486 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:12:01,528 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:12:01,568 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:12:01,593 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:12:01,616 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:12:01,634 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:12:01,653 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:12:01,690 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 86 treesize of output 76 [2019-01-20 10:12:01,710 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:01,713 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:01,713 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 73 treesize of output 80 [2019-01-20 10:12:01,760 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:01,761 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:01,764 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:01,765 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:01,766 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 63 treesize of output 82 [2019-01-20 10:12:01,823 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:01,824 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:01,825 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:01,826 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:01,828 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:01,830 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:01,831 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 51 treesize of output 87 [2019-01-20 10:12:01,899 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:01,900 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:01,901 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:01,903 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:01,904 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:01,905 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:01,906 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:01,908 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:01,909 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 101 [2019-01-20 10:12:01,998 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:02,000 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:02,001 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:02,002 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:02,003 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:02,004 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:02,005 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:02,007 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:02,008 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:02,010 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:02,011 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 81 [2019-01-20 10:12:02,011 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-20 10:12:02,047 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:12:02,085 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:12:02,124 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:12:02,164 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:12:02,203 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:12:02,272 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 2 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-20 10:12:02,273 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 8 variables, input treesize:113, output treesize:121 [2019-01-20 10:12:02,305 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:02,306 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 122 [2019-01-20 10:12:02,306 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-20 10:12:02,370 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-20 10:12:02,371 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:126, output treesize:92 [2019-01-20 10:12:02,416 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-20 10:12:02,416 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-20 10:12:02,429 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-20 10:12:02,448 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-20 10:12:02,448 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-01-20 10:12:02,448 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-20 10:12:02,448 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-01-20 10:12:02,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-01-20 10:12:02,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-01-20 10:12:02,449 INFO L87 Difference]: Start difference. First operand 104 states and 599 transitions. Second operand 6 states. [2019-01-20 10:12:02,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-20 10:12:02,987 INFO L93 Difference]: Finished difference Result 124 states and 613 transitions. [2019-01-20 10:12:02,988 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-01-20 10:12:02,988 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 4 [2019-01-20 10:12:02,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-20 10:12:02,990 INFO L225 Difference]: With dead ends: 124 [2019-01-20 10:12:02,990 INFO L226 Difference]: Without dead ends: 123 [2019-01-20 10:12:02,990 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 [2019-01-20 10:12:02,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2019-01-20 10:12:03,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 104. [2019-01-20 10:12:03,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2019-01-20 10:12:03,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 598 transitions. [2019-01-20 10:12:03,008 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 598 transitions. Word has length 4 [2019-01-20 10:12:03,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-20 10:12:03,008 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 598 transitions. [2019-01-20 10:12:03,008 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-01-20 10:12:03,008 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 598 transitions. [2019-01-20 10:12:03,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-20 10:12:03,009 INFO L394 BasicCegarLoop]: Found error trace [2019-01-20 10:12:03,009 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-20 10:12:03,009 INFO L423 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-01-20 10:12:03,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-20 10:12:03,010 INFO L82 PathProgramCache]: Analyzing trace with hash 937816, now seen corresponding path program 1 times [2019-01-20 10:12:03,010 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-20 10:12:03,010 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-20 10:12:03,010 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-20 10:12:03,010 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-20 10:12:03,010 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-20 10:12:03,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-20 10:12:03,592 WARN L181 SmtUtils]: Spent 532.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 16 [2019-01-20 10:12:03,725 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-20 10:12:03,725 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-20 10:12:03,725 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-20 10:12:03,726 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-20 10:12:03,726 INFO L207 CegarAbsIntRunner]: [0], [14], [26], [35] [2019-01-20 10:12:03,727 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-20 10:12:03,727 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-20 10:12:03,730 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-20 10:12:03,730 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 86 root evaluator evaluations with a maximum evaluation depth of 2. Performed 86 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-20 10:12:03,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-20 10:12:03,730 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-20 10:12:03,730 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-20 10:12:03,730 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 [2019-01-20 10:12:03,744 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-20 10:12:03,744 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-20 10:12:03,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-20 10:12:03,761 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-20 10:12:03,788 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 27 treesize of output 30 [2019-01-20 10:12:03,792 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-20 10:12:03,795 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:03,797 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:03,798 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 32 treesize of output 46 [2019-01-20 10:12:03,801 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:03,802 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:03,804 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:03,804 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 34 treesize of output 60 [2019-01-20 10:12:03,809 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:03,811 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:03,812 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:03,814 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:03,814 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 36 treesize of output 78 [2019-01-20 10:12:03,818 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:03,819 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:03,820 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:03,822 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:03,823 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:03,824 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-20 10:12:03,829 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:03,831 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:03,833 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:03,835 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:03,836 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:03,838 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:03,839 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-20 10:12:03,850 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2019-01-20 10:12:03,851 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-01-20 10:12:03,912 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:12:03,958 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:12:03,993 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:12:04,022 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:12:04,046 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:12:04,067 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:12:04,087 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:12:04,133 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:04,134 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 91 treesize of output 91 [2019-01-20 10:12:04,179 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:04,180 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:04,181 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 78 treesize of output 84 [2019-01-20 10:12:04,230 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:04,231 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:04,233 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:04,234 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:04,235 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 63 treesize of output 86 [2019-01-20 10:12:04,294 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:04,295 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:04,296 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:04,298 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:04,299 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:04,300 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:04,301 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 51 treesize of output 91 [2019-01-20 10:12:04,377 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:04,378 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:04,379 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:04,380 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:04,382 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:04,383 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:04,384 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:04,385 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:04,386 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-01-20 10:12:04,481 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:04,483 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:04,484 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:04,485 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:04,486 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:04,487 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:04,489 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:04,490 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:04,491 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:04,492 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:04,493 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-01-20 10:12:04,494 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-20 10:12:04,533 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:12:04,573 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:12:04,614 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:12:04,656 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:12:04,698 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:12:04,774 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. [2019-01-20 10:12:04,774 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 7 variables, input treesize:121, output treesize:125 [2019-01-20 10:12:04,893 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:04,895 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 126 [2019-01-20 10:12:04,895 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-20 10:12:04,963 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. [2019-01-20 10:12:04,964 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:130, output treesize:96 [2019-01-20 10:12:04,996 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:04,997 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:04,998 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:04,999 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:05,001 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:05,002 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:05,042 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:05,063 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:05,086 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:05,087 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 24 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 140 [2019-01-20 10:12:05,088 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-20 10:12:05,522 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-20 10:12:05,523 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:106, output treesize:76 [2019-01-20 10:12:05,546 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-20 10:12:05,546 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-20 10:12:05,574 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-20 10:12:05,595 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-20 10:12:05,595 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 8 [2019-01-20 10:12:05,595 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-20 10:12:05,595 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-20 10:12:05,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-20 10:12:05,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2019-01-20 10:12:05,596 INFO L87 Difference]: Start difference. First operand 104 states and 598 transitions. Second operand 8 states. [2019-01-20 10:12:06,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-20 10:12:06,487 INFO L93 Difference]: Finished difference Result 176 states and 800 transitions. [2019-01-20 10:12:06,488 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-01-20 10:12:06,488 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-20 10:12:06,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-20 10:12:06,490 INFO L225 Difference]: With dead ends: 176 [2019-01-20 10:12:06,490 INFO L226 Difference]: Without dead ends: 174 [2019-01-20 10:12:06,491 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2019-01-20 10:12:06,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2019-01-20 10:12:06,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 108. [2019-01-20 10:12:06,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2019-01-20 10:12:06,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 670 transitions. [2019-01-20 10:12:06,513 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 670 transitions. Word has length 4 [2019-01-20 10:12:06,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-20 10:12:06,514 INFO L480 AbstractCegarLoop]: Abstraction has 108 states and 670 transitions. [2019-01-20 10:12:06,514 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-20 10:12:06,514 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 670 transitions. [2019-01-20 10:12:06,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-20 10:12:06,514 INFO L394 BasicCegarLoop]: Found error trace [2019-01-20 10:12:06,514 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-20 10:12:06,514 INFO L423 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-01-20 10:12:06,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-20 10:12:06,515 INFO L82 PathProgramCache]: Analyzing trace with hash 953504, now seen corresponding path program 1 times [2019-01-20 10:12:06,515 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-20 10:12:06,515 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-20 10:12:06,516 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-20 10:12:06,516 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-20 10:12:06,516 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-20 10:12:06,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-20 10:12:06,667 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-20 10:12:06,667 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-20 10:12:06,667 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-20 10:12:06,668 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-20 10:12:06,668 INFO L207 CegarAbsIntRunner]: [0], [30], [36], [37] [2019-01-20 10:12:06,670 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-20 10:12:06,670 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-20 10:12:06,672 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-20 10:12:06,672 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 86 root evaluator evaluations with a maximum evaluation depth of 2. Performed 86 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2019-01-20 10:12:06,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-20 10:12:06,672 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-20 10:12:06,672 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-20 10:12:06,672 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-01-20 10:12:06,682 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-20 10:12:06,682 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-20 10:12:06,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-20 10:12:06,688 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-20 10:12:06,691 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 86 treesize of output 76 [2019-01-20 10:12:06,712 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:06,714 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:06,714 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 73 treesize of output 80 [2019-01-20 10:12:06,761 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:06,763 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:06,765 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:06,767 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:06,767 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 63 treesize of output 82 [2019-01-20 10:12:06,819 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:06,820 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:06,820 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:06,822 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:06,823 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:06,825 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:06,826 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 51 treesize of output 87 [2019-01-20 10:12:06,895 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:06,896 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:06,897 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:06,898 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:06,900 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:06,901 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:06,902 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:06,905 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:06,906 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 101 [2019-01-20 10:12:06,994 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:06,995 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:06,996 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:06,997 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:06,998 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:06,999 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:07,000 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:07,002 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:07,003 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:07,005 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:07,006 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 81 [2019-01-20 10:12:07,007 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-20 10:12:07,046 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:12:07,085 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:12:07,126 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:12:07,168 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:12:07,212 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:12:07,262 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 27 treesize of output 30 [2019-01-20 10:12:07,267 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 10 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2019-01-20 10:12:07,273 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 14 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 42 [2019-01-20 10:12:07,277 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 17 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 56 [2019-01-20 10:12:07,280 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 19 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 74 [2019-01-20 10:12:07,287 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 20 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 96 [2019-01-20 10:12:07,293 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 20 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 122 [2019-01-20 10:12:07,308 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 121 [2019-01-20 10:12:07,309 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-20 10:12:07,361 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:12:07,402 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:12:07,433 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:12:07,458 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:12:07,478 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:12:07,495 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:12:07,511 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:12:07,581 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 2 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-20 10:12:07,581 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 8 variables, input treesize:113, output treesize:121 [2019-01-20 10:12:07,617 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:07,618 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 122 [2019-01-20 10:12:07,618 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-20 10:12:07,688 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-20 10:12:07,689 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:126, output treesize:92 [2019-01-20 10:12:07,737 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-20 10:12:07,738 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-20 10:12:07,747 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-20 10:12:07,765 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-20 10:12:07,766 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-01-20 10:12:07,766 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-20 10:12:07,766 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-01-20 10:12:07,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-01-20 10:12:07,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-01-20 10:12:07,766 INFO L87 Difference]: Start difference. First operand 108 states and 670 transitions. Second operand 6 states. [2019-01-20 10:12:08,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-20 10:12:08,115 INFO L93 Difference]: Finished difference Result 135 states and 696 transitions. [2019-01-20 10:12:08,115 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-01-20 10:12:08,115 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 4 [2019-01-20 10:12:08,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-20 10:12:08,118 INFO L225 Difference]: With dead ends: 135 [2019-01-20 10:12:08,118 INFO L226 Difference]: Without dead ends: 134 [2019-01-20 10:12:08,119 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2019-01-20 10:12:08,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2019-01-20 10:12:08,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 108. [2019-01-20 10:12:08,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2019-01-20 10:12:08,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 670 transitions. [2019-01-20 10:12:08,146 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 670 transitions. Word has length 4 [2019-01-20 10:12:08,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-20 10:12:08,146 INFO L480 AbstractCegarLoop]: Abstraction has 108 states and 670 transitions. [2019-01-20 10:12:08,146 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-01-20 10:12:08,146 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 670 transitions. [2019-01-20 10:12:08,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-20 10:12:08,147 INFO L394 BasicCegarLoop]: Found error trace [2019-01-20 10:12:08,147 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-01-20 10:12:08,147 INFO L423 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-01-20 10:12:08,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-20 10:12:08,147 INFO L82 PathProgramCache]: Analyzing trace with hash 29600478, now seen corresponding path program 1 times [2019-01-20 10:12:08,147 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-20 10:12:08,148 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-20 10:12:08,148 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-20 10:12:08,148 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-20 10:12:08,148 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-20 10:12:08,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-20 10:12:08,341 WARN L181 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 16 [2019-01-20 10:12:08,532 WARN L181 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 5 [2019-01-20 10:12:08,533 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-20 10:12:08,533 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-20 10:12:08,533 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-20 10:12:08,533 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-01-20 10:12:08,533 INFO L207 CegarAbsIntRunner]: [0], [18], [22], [32], [35] [2019-01-20 10:12:08,534 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-20 10:12:08,534 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-20 10:12:08,536 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-20 10:12:08,536 INFO L272 AbstractInterpreter]: Visited 5 different actions 5 times. Never merged. Never widened. Performed 88 root evaluator evaluations with a maximum evaluation depth of 2. Performed 88 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 3 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-20 10:12:08,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-20 10:12:08,537 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-20 10:12:08,537 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-20 10:12:08,537 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 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 [2019-01-20 10:12:08,547 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-20 10:12:08,547 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-20 10:12:08,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-20 10:12:08,554 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-20 10:12:08,583 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-20 10:12:08,587 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 30 treesize of output 36 [2019-01-20 10:12:08,590 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:08,592 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:08,593 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 32 treesize of output 46 [2019-01-20 10:12:08,596 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:08,597 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:08,599 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:08,600 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 34 treesize of output 60 [2019-01-20 10:12:08,604 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:08,606 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:08,608 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:08,609 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:08,610 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 36 treesize of output 78 [2019-01-20 10:12:08,615 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:08,616 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:08,617 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:08,618 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:08,620 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:08,620 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-20 10:12:08,625 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:08,626 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:08,627 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:08,628 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:08,630 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:08,631 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:08,632 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-20 10:12:08,638 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:08,638 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:08,639 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:08,641 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:08,642 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:08,643 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:08,645 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:08,646 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 153 [2019-01-20 10:12:08,646 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-01-20 10:12:08,725 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:12:08,773 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:12:08,811 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:12:08,840 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:12:08,866 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:12:08,886 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:12:08,908 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:12:08,952 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:08,953 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 117 treesize of output 114 [2019-01-20 10:12:09,006 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:09,007 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:09,008 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 104 [2019-01-20 10:12:09,068 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:09,070 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:09,071 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:09,072 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:09,073 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 83 treesize of output 103 [2019-01-20 10:12:09,142 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:09,144 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:09,146 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:09,147 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:09,148 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:09,150 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:09,151 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 68 treesize of output 105 [2019-01-20 10:12:09,234 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:09,235 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:09,236 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:09,237 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:09,239 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:09,240 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:09,241 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:09,242 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:09,243 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 116 [2019-01-20 10:12:09,350 WARN L181 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2019-01-20 10:12:09,353 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:09,354 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:09,355 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:09,356 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:09,358 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:09,359 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:09,360 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:09,361 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:09,362 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:09,363 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:09,364 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 134 [2019-01-20 10:12:09,495 WARN L181 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2019-01-20 10:12:09,499 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:09,501 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:09,502 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:09,503 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:09,504 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:09,505 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:09,507 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:09,508 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:09,509 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:09,510 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:09,511 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:09,512 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:09,513 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 113 [2019-01-20 10:12:09,514 INFO L267 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2019-01-20 10:12:09,572 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:12:09,630 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:12:09,688 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:12:09,752 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:12:09,826 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:12:09,893 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:12:09,991 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. [2019-01-20 10:12:09,992 INFO L202 ElimStorePlain]: Needed 16 recursive calls to eliminate 6 variables, input treesize:147, output treesize:153 [2019-01-20 10:12:10,031 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:10,032 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 159 [2019-01-20 10:12:10,032 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-20 10:12:10,130 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. [2019-01-20 10:12:10,131 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:163, output treesize:125 [2019-01-20 10:12:10,173 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:10,174 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:10,175 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:10,177 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:10,178 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:10,179 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:10,181 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:10,182 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:10,183 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:10,184 INFO L683 Elim1Store]: detected equality via solver [2019-01-20 10:12:10,185 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 166 [2019-01-20 10:12:10,186 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-20 10:12:10,282 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-20 10:12:10,283 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:137, output treesize:105 [2019-01-20 10:12:10,313 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:10,314 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:10,315 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:10,316 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:10,317 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:10,318 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:10,319 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:10,320 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:10,321 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:10,322 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:10,323 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:10,325 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:10,326 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:10,327 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:10,328 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:10,329 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 31 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 169 [2019-01-20 10:12:10,330 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-20 10:12:10,424 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 1 dim-1 vars, End of recursive call: 7 dim-0 vars, and 1 xjuncts. [2019-01-20 10:12:10,424 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:119, output treesize:89 [2019-01-20 10:12:10,462 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-20 10:12:10,462 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-20 10:12:10,499 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-20 10:12:10,517 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-20 10:12:10,517 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2019-01-20 10:12:10,517 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-20 10:12:10,517 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-01-20 10:12:10,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-01-20 10:12:10,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2019-01-20 10:12:10,518 INFO L87 Difference]: Start difference. First operand 108 states and 670 transitions. Second operand 10 states. [2019-01-20 10:12:11,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-20 10:12:11,621 INFO L93 Difference]: Finished difference Result 212 states and 968 transitions. [2019-01-20 10:12:11,621 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-01-20 10:12:11,621 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2019-01-20 10:12:11,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-20 10:12:11,625 INFO L225 Difference]: With dead ends: 212 [2019-01-20 10:12:11,625 INFO L226 Difference]: Without dead ends: 205 [2019-01-20 10:12:11,626 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2019-01-20 10:12:11,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2019-01-20 10:12:11,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 122. [2019-01-20 10:12:11,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2019-01-20 10:12:11,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 789 transitions. [2019-01-20 10:12:11,659 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 789 transitions. Word has length 5 [2019-01-20 10:12:11,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-20 10:12:11,660 INFO L480 AbstractCegarLoop]: Abstraction has 122 states and 789 transitions. [2019-01-20 10:12:11,660 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-01-20 10:12:11,660 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 789 transitions. [2019-01-20 10:12:11,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-20 10:12:11,660 INFO L394 BasicCegarLoop]: Found error trace [2019-01-20 10:12:11,661 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-01-20 10:12:11,661 INFO L423 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-01-20 10:12:11,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-20 10:12:11,661 INFO L82 PathProgramCache]: Analyzing trace with hash 29600106, now seen corresponding path program 1 times [2019-01-20 10:12:11,661 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-20 10:12:11,662 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-20 10:12:11,662 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-20 10:12:11,662 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-20 10:12:11,662 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-20 10:12:11,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-20 10:12:11,954 WARN L181 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2019-01-20 10:12:11,987 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-20 10:12:11,987 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-20 10:12:11,987 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-20 10:12:11,987 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-01-20 10:12:11,987 INFO L207 CegarAbsIntRunner]: [0], [10], [18], [32], [35] [2019-01-20 10:12:11,988 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-20 10:12:11,988 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-20 10:12:11,990 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-20 10:12:11,990 INFO L272 AbstractInterpreter]: Visited 5 different actions 5 times. Never merged. Never widened. Performed 88 root evaluator evaluations with a maximum evaluation depth of 2. Performed 88 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 3 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-20 10:12:11,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-20 10:12:11,991 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-20 10:12:11,991 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-20 10:12:11,991 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 [2019-01-20 10:12:12,004 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-20 10:12:12,004 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-20 10:12:12,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-20 10:12:12,011 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-20 10:12:12,043 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:12,044 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 117 treesize of output 114 [2019-01-20 10:12:12,100 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:12,102 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:12,102 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 101 treesize of output 104 [2019-01-20 10:12:12,158 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:12,161 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:12,163 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:12,166 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:12,166 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 83 treesize of output 103 [2019-01-20 10:12:12,235 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:12,237 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:12,239 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:12,241 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:12,242 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:12,244 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:12,244 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 105 [2019-01-20 10:12:12,331 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:12,334 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:12,337 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:12,340 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:12,342 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:12,344 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:12,347 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:12,350 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:12,351 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 116 [2019-01-20 10:12:12,457 WARN L181 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2019-01-20 10:12:12,465 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:12,467 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:12,469 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:12,471 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:12,474 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:12,476 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:12,478 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:12,482 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:12,484 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:12,487 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:12,488 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 134 [2019-01-20 10:12:12,616 WARN L181 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2019-01-20 10:12:12,621 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:12,623 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:12,624 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:12,625 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:12,627 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:12,629 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:12,630 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:12,632 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:12,633 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:12,635 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:12,638 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:12,639 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:12,640 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 113 [2019-01-20 10:12:12,640 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-20 10:12:12,708 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:12:12,776 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:12:12,850 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:12:12,922 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:12:13,002 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:12:13,075 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:12:13,161 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 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 27 treesize of output 30 [2019-01-20 10:12:13,165 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 13 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-20 10:12:13,168 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 18 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-20 10:12:13,172 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 22 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-20 10:12:13,175 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 25 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-20 10:12:13,179 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 27 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-20 10:12:13,183 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 28 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-20 10:12:13,187 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 153 [2019-01-20 10:12:13,187 INFO L267 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2019-01-20 10:12:13,260 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:12:13,305 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:12:13,337 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:12:13,363 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:12:13,385 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:12:13,403 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:12:13,420 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:12:13,523 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. [2019-01-20 10:12:13,524 INFO L202 ElimStorePlain]: Needed 16 recursive calls to eliminate 6 variables, input treesize:147, output treesize:153 [2019-01-20 10:12:13,561 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:13,562 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 159 [2019-01-20 10:12:13,563 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-20 10:12:13,659 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. [2019-01-20 10:12:13,660 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:163, output treesize:125 [2019-01-20 10:12:13,695 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:13,696 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:13,697 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:13,698 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:13,698 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:13,699 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:13,700 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:13,702 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:13,703 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:13,703 INFO L683 Elim1Store]: detected equality via solver [2019-01-20 10:12:13,704 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 166 [2019-01-20 10:12:13,705 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-20 10:12:13,803 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-20 10:12:13,803 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:137, output treesize:105 [2019-01-20 10:12:13,833 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:13,834 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:13,835 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:13,836 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:13,837 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:13,838 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:13,840 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:13,841 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:13,842 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:13,843 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:13,845 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:13,846 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:13,847 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:13,848 INFO L683 Elim1Store]: detected equality via solver [2019-01-20 10:12:13,849 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 170 [2019-01-20 10:12:13,850 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-20 10:12:13,945 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 1 dim-1 vars, End of recursive call: 7 dim-0 vars, and 1 xjuncts. [2019-01-20 10:12:13,945 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:119, output treesize:95 [2019-01-20 10:12:14,002 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-20 10:12:14,002 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-20 10:12:14,044 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-20 10:12:14,062 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-20 10:12:14,062 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2019-01-20 10:12:14,062 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-20 10:12:14,062 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-01-20 10:12:14,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-01-20 10:12:14,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2019-01-20 10:12:14,063 INFO L87 Difference]: Start difference. First operand 122 states and 789 transitions. Second operand 10 states. [2019-01-20 10:12:17,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-20 10:12:17,638 INFO L93 Difference]: Finished difference Result 169 states and 850 transitions. [2019-01-20 10:12:17,638 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-01-20 10:12:17,639 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2019-01-20 10:12:17,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-20 10:12:17,641 INFO L225 Difference]: With dead ends: 169 [2019-01-20 10:12:17,641 INFO L226 Difference]: Without dead ends: 168 [2019-01-20 10:12:17,642 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=100, Invalid=172, Unknown=0, NotChecked=0, Total=272 [2019-01-20 10:12:17,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2019-01-20 10:12:17,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 119. [2019-01-20 10:12:17,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2019-01-20 10:12:17,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 762 transitions. [2019-01-20 10:12:17,675 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 762 transitions. Word has length 5 [2019-01-20 10:12:17,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-20 10:12:17,675 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 762 transitions. [2019-01-20 10:12:17,675 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-01-20 10:12:17,675 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 762 transitions. [2019-01-20 10:12:17,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-20 10:12:17,676 INFO L394 BasicCegarLoop]: Found error trace [2019-01-20 10:12:17,676 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-01-20 10:12:17,676 INFO L423 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-01-20 10:12:17,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-20 10:12:17,677 INFO L82 PathProgramCache]: Analyzing trace with hash 29600602, now seen corresponding path program 1 times [2019-01-20 10:12:17,677 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-20 10:12:17,677 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-20 10:12:17,678 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-20 10:12:17,678 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-20 10:12:17,678 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-20 10:12:17,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-20 10:12:17,787 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-20 10:12:17,787 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-20 10:12:17,787 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-20 10:12:17,788 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-01-20 10:12:17,788 INFO L207 CegarAbsIntRunner]: [0], [18], [26], [32], [35] [2019-01-20 10:12:17,789 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-20 10:12:17,789 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-20 10:12:17,792 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-20 10:12:17,792 INFO L272 AbstractInterpreter]: Visited 5 different actions 5 times. Never merged. Never widened. Performed 88 root evaluator evaluations with a maximum evaluation depth of 2. Performed 88 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 3 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-20 10:12:17,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-20 10:12:17,793 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-20 10:12:17,793 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-20 10:12:17,793 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-01-20 10:12:17,808 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-20 10:12:17,808 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-20 10:12:17,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-20 10:12:17,815 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-20 10:12:17,847 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:17,847 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 117 treesize of output 114 [2019-01-20 10:12:17,898 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:17,899 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:17,900 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 104 [2019-01-20 10:12:17,958 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:17,959 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:17,961 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:17,962 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:17,963 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 83 treesize of output 103 [2019-01-20 10:12:18,030 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:18,031 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:18,032 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:18,033 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:18,034 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:18,035 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:18,036 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 68 treesize of output 105 [2019-01-20 10:12:18,122 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:18,123 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:18,124 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:18,125 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:18,126 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:18,128 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:18,129 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:18,130 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:18,131 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 116 [2019-01-20 10:12:18,232 WARN L181 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2019-01-20 10:12:18,236 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:18,237 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:18,238 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:18,240 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:18,241 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:18,242 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:18,244 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:18,246 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:18,247 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:18,248 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:18,250 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 134 [2019-01-20 10:12:18,378 WARN L181 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2019-01-20 10:12:18,382 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:18,383 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:18,384 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:18,385 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:18,387 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:18,388 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:18,389 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:18,390 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:18,392 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:18,393 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:18,394 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:18,395 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:18,396 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 113 [2019-01-20 10:12:18,397 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-20 10:12:18,462 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:12:18,522 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:12:18,586 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:12:18,649 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:12:18,711 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:12:18,778 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:12:18,854 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 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 27 treesize of output 30 [2019-01-20 10:12:18,858 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 13 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-20 10:12:18,861 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 18 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-20 10:12:18,864 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 22 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-20 10:12:18,868 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 25 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-20 10:12:18,871 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 27 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-20 10:12:18,875 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 28 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-20 10:12:18,879 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 153 [2019-01-20 10:12:18,880 INFO L267 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2019-01-20 10:12:18,955 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:12:18,998 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:12:19,032 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:12:19,058 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:12:19,080 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:12:19,098 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:12:19,115 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:12:19,213 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. [2019-01-20 10:12:19,214 INFO L202 ElimStorePlain]: Needed 16 recursive calls to eliminate 6 variables, input treesize:147, output treesize:153 [2019-01-20 10:12:19,268 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:19,268 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 159 [2019-01-20 10:12:19,269 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-20 10:12:19,371 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. [2019-01-20 10:12:19,371 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:163, output treesize:125 [2019-01-20 10:12:19,449 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:19,468 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:19,469 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:19,469 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:19,470 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:19,471 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:19,471 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:19,472 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:19,473 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:19,474 INFO L683 Elim1Store]: detected equality via solver [2019-01-20 10:12:19,475 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 166 [2019-01-20 10:12:19,477 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-20 10:12:19,574 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-20 10:12:19,574 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:137, output treesize:105 [2019-01-20 10:12:19,623 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:19,624 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:19,625 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:19,627 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:19,628 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:19,629 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:19,631 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:19,632 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:19,633 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:19,634 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:19,636 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:19,637 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:19,638 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:19,639 INFO L683 Elim1Store]: detected equality via solver [2019-01-20 10:12:19,640 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 170 [2019-01-20 10:12:19,640 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-20 10:12:19,736 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 1 dim-1 vars, End of recursive call: 7 dim-0 vars, and 1 xjuncts. [2019-01-20 10:12:19,737 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:119, output treesize:95 [2019-01-20 10:12:19,829 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-20 10:12:19,829 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-20 10:12:19,871 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-20 10:12:19,891 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-20 10:12:19,891 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2019-01-20 10:12:19,891 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-20 10:12:19,892 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-01-20 10:12:19,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-01-20 10:12:19,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2019-01-20 10:12:19,892 INFO L87 Difference]: Start difference. First operand 119 states and 762 transitions. Second operand 10 states. [2019-01-20 10:12:21,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-20 10:12:21,706 INFO L93 Difference]: Finished difference Result 176 states and 845 transitions. [2019-01-20 10:12:21,707 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-01-20 10:12:21,707 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2019-01-20 10:12:21,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-20 10:12:21,710 INFO L225 Difference]: With dead ends: 176 [2019-01-20 10:12:21,710 INFO L226 Difference]: Without dead ends: 172 [2019-01-20 10:12:21,711 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2019-01-20 10:12:21,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2019-01-20 10:12:21,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 125. [2019-01-20 10:12:21,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2019-01-20 10:12:21,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 788 transitions. [2019-01-20 10:12:21,735 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 788 transitions. Word has length 5 [2019-01-20 10:12:21,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-20 10:12:21,735 INFO L480 AbstractCegarLoop]: Abstraction has 125 states and 788 transitions. [2019-01-20 10:12:21,736 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-01-20 10:12:21,736 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 788 transitions. [2019-01-20 10:12:21,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-20 10:12:21,736 INFO L394 BasicCegarLoop]: Found error trace [2019-01-20 10:12:21,736 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-01-20 10:12:21,736 INFO L423 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-01-20 10:12:21,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-20 10:12:21,737 INFO L82 PathProgramCache]: Analyzing trace with hash 29588822, now seen corresponding path program 1 times [2019-01-20 10:12:21,737 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-20 10:12:21,737 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-20 10:12:21,737 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-20 10:12:21,737 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-20 10:12:21,737 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-20 10:12:21,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-20 10:12:21,928 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-20 10:12:21,928 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-20 10:12:21,928 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-20 10:12:21,928 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-01-20 10:12:21,928 INFO L207 CegarAbsIntRunner]: [0], [6], [18], [32], [35] [2019-01-20 10:12:21,929 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-20 10:12:21,930 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-20 10:12:21,932 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-20 10:12:21,932 INFO L272 AbstractInterpreter]: Visited 5 different actions 5 times. Never merged. Never widened. Performed 88 root evaluator evaluations with a maximum evaluation depth of 2. Performed 88 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 3 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-20 10:12:21,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-20 10:12:21,932 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-20 10:12:21,932 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-20 10:12:21,933 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 [2019-01-20 10:12:21,944 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-20 10:12:21,944 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-20 10:12:21,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-20 10:12:21,950 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-20 10:12:21,978 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:21,979 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-01-20 10:12:22,022 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:22,024 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:22,025 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 78 treesize of output 84 [2019-01-20 10:12:22,076 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:22,078 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:22,079 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:22,080 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:22,081 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 63 treesize of output 86 [2019-01-20 10:12:22,143 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:22,143 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:22,144 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:22,145 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:22,147 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:22,148 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:22,149 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 51 treesize of output 91 [2019-01-20 10:12:22,223 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:22,224 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:22,225 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:22,226 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:22,227 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:22,228 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:22,230 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:22,231 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:22,232 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-01-20 10:12:22,325 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:22,326 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:22,327 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:22,328 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:22,329 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:22,330 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:22,332 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:22,333 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:22,334 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:22,335 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:22,336 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-01-20 10:12:22,337 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-20 10:12:22,380 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:12:22,422 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:12:22,465 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:12:22,507 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:12:22,552 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:12:22,604 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-20 10:12:22,623 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 11 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-20 10:12:22,639 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 15 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-20 10:12:22,655 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-20 10:12:22,659 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 20 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-20 10:12:22,661 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 21 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-20 10:12:22,665 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-20 10:12:22,677 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2019-01-20 10:12:22,678 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-20 10:12:22,739 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:12:22,782 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:12:22,815 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:12:22,842 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:12:22,863 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:12:22,880 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:12:22,896 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:12:22,969 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. [2019-01-20 10:12:22,970 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 7 variables, input treesize:121, output treesize:125 [2019-01-20 10:12:23,027 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:23,085 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 22 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 14 case distinctions, treesize of input 51 treesize of output 153 [2019-01-20 10:12:23,085 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2019-01-20 10:12:23,122 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 128 xjuncts. [2019-01-20 10:12:24,753 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 41 dim-0 vars, and 8 xjuncts. [2019-01-20 10:12:24,753 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:135, output treesize:822 [2019-01-20 10:12:26,679 WARN L181 SmtUtils]: Spent 1.69 s on a formula simplification. DAG size of input: 422 DAG size of output: 162 [2019-01-20 10:12:26,687 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:26,688 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:26,689 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:26,690 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:26,691 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:26,693 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:26,693 INFO L683 Elim1Store]: detected equality via solver [2019-01-20 10:12:26,694 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 150 [2019-01-20 10:12:26,695 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-20 10:12:26,943 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:26,944 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:26,944 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:26,945 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:26,946 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:26,947 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:26,948 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:26,949 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:26,950 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:26,951 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 24 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 142 [2019-01-20 10:12:26,952 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-01-20 10:12:27,179 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:27,180 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:27,181 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:27,182 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:27,184 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:27,185 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:27,186 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:27,187 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:27,188 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:27,189 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 24 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 158 [2019-01-20 10:12:27,190 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-01-20 10:12:27,398 INFO L267 ElimStorePlain]: Start of recursive call 1: 15 dim-0 vars, 3 dim-1 vars, End of recursive call: 15 dim-0 vars, and 3 xjuncts. [2019-01-20 10:12:27,399 INFO L202 ElimStorePlain]: Needed 4 recursive calls to eliminate 18 variables, input treesize:329, output treesize:277 [2019-01-20 10:12:27,521 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:27,522 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:27,523 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:27,523 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:27,524 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:27,525 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:27,527 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:27,528 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:27,529 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:27,530 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:27,531 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:27,532 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:27,533 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:27,534 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:27,535 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:27,536 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:27,537 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:27,538 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 27 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 156 [2019-01-20 10:12:27,540 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-20 10:12:27,762 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:27,762 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:27,763 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:27,764 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:27,766 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:27,767 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:27,768 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:27,769 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:27,770 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:27,771 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:27,772 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:27,773 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:27,774 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:27,775 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:27,776 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:27,777 INFO L683 Elim1Store]: detected equality via solver [2019-01-20 10:12:27,778 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 24 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 173 [2019-01-20 10:12:27,779 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-01-20 10:12:28,004 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:28,005 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 130 treesize of output 162 [2019-01-20 10:12:28,006 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-01-20 10:12:28,177 INFO L267 ElimStorePlain]: Start of recursive call 1: 18 dim-0 vars, 3 dim-1 vars, End of recursive call: 18 dim-0 vars, and 3 xjuncts. [2019-01-20 10:12:28,177 INFO L202 ElimStorePlain]: Needed 4 recursive calls to eliminate 21 variables, input treesize:307, output treesize:237 [2019-01-20 10:12:28,532 WARN L181 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2019-01-20 10:12:28,533 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-20 10:12:28,534 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-20 10:12:28,555 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-20 10:12:28,572 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-20 10:12:28,573 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2019-01-20 10:12:28,573 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-20 10:12:28,573 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-01-20 10:12:28,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-01-20 10:12:28,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2019-01-20 10:12:28,573 INFO L87 Difference]: Start difference. First operand 125 states and 788 transitions. Second operand 10 states. [2019-01-20 10:12:29,126 WARN L181 SmtUtils]: Spent 432.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 114 [2019-01-20 10:12:41,216 WARN L181 SmtUtils]: Spent 660.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 147 [2019-01-20 10:12:42,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-20 10:12:42,492 INFO L93 Difference]: Finished difference Result 235 states and 1248 transitions. [2019-01-20 10:12:42,492 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-01-20 10:12:42,493 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2019-01-20 10:12:42,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-20 10:12:42,495 INFO L225 Difference]: With dead ends: 235 [2019-01-20 10:12:42,495 INFO L226 Difference]: Without dead ends: 230 [2019-01-20 10:12:42,496 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2019-01-20 10:12:42,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2019-01-20 10:12:42,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 145. [2019-01-20 10:12:42,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2019-01-20 10:12:42,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 973 transitions. [2019-01-20 10:12:42,541 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 973 transitions. Word has length 5 [2019-01-20 10:12:42,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-20 10:12:42,542 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 973 transitions. [2019-01-20 10:12:42,542 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-01-20 10:12:42,542 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 973 transitions. [2019-01-20 10:12:42,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-20 10:12:42,543 INFO L394 BasicCegarLoop]: Found error trace [2019-01-20 10:12:42,543 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-01-20 10:12:42,543 INFO L423 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-01-20 10:12:42,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-20 10:12:42,543 INFO L82 PathProgramCache]: Analyzing trace with hash 29589382, now seen corresponding path program 1 times [2019-01-20 10:12:42,543 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-20 10:12:42,544 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-20 10:12:42,544 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-20 10:12:42,544 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-20 10:12:42,544 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-20 10:12:42,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-20 10:12:42,755 WARN L181 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 18 [2019-01-20 10:12:42,777 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-20 10:12:42,777 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-20 10:12:42,777 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-20 10:12:42,777 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-01-20 10:12:42,777 INFO L207 CegarAbsIntRunner]: [0], [6], [32], [36], [37] [2019-01-20 10:12:42,778 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-20 10:12:42,778 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-20 10:12:42,780 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-20 10:12:42,781 INFO L272 AbstractInterpreter]: Visited 5 different actions 5 times. Never merged. Never widened. Performed 88 root evaluator evaluations with a maximum evaluation depth of 2. Performed 88 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-20 10:12:42,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-20 10:12:42,781 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-20 10:12:42,781 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-20 10:12:42,781 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 [2019-01-20 10:12:42,790 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-20 10:12:42,790 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-20 10:12:42,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-20 10:12:42,796 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-20 10:12:42,822 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:42,822 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 91 treesize of output 91 [2019-01-20 10:12:42,875 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:42,877 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:42,877 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 78 treesize of output 84 [2019-01-20 10:12:42,927 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:42,928 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:42,929 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:42,931 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:42,931 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 63 treesize of output 86 [2019-01-20 10:12:42,990 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:42,991 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:42,992 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:42,994 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:42,995 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:42,996 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:42,997 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 51 treesize of output 91 [2019-01-20 10:12:43,071 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:43,073 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:43,074 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:43,075 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:43,076 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:43,078 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:43,079 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:43,080 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:43,081 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-01-20 10:12:43,177 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:43,178 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:43,179 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:43,180 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:43,182 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:43,183 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:43,184 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:43,185 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:43,187 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:43,188 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:43,188 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-01-20 10:12:43,189 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-20 10:12:43,231 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:12:43,273 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:12:43,313 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:12:43,356 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:12:43,401 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:12:43,463 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 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 27 treesize of output 30 [2019-01-20 10:12:43,466 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 11 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-20 10:12:43,469 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 15 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-20 10:12:43,472 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-20 10:12:43,475 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 20 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-20 10:12:43,478 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 21 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-20 10:12:43,483 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-20 10:12:43,494 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2019-01-20 10:12:43,495 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-20 10:12:43,552 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:12:43,595 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:12:43,629 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:12:43,655 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:12:43,676 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:12:43,693 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:12:43,710 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:12:43,783 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. [2019-01-20 10:12:43,783 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 7 variables, input treesize:121, output treesize:125 [2019-01-20 10:12:44,013 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:44,014 INFO L303 Elim1Store]: Index analysis took 206 ms [2019-01-20 10:12:44,074 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 22 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 14 case distinctions, treesize of input 51 treesize of output 153 [2019-01-20 10:12:44,074 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2019-01-20 10:12:44,101 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 128 xjuncts. [2019-01-20 10:12:45,724 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 41 dim-0 vars, and 8 xjuncts. [2019-01-20 10:12:45,725 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:135, output treesize:820 [2019-01-20 10:12:46,074 WARN L181 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 422 DAG size of output: 162 [2019-01-20 10:12:46,082 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:46,083 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:46,084 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:46,085 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:46,086 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:46,087 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:46,088 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:46,089 INFO L683 Elim1Store]: detected equality via solver [2019-01-20 10:12:46,090 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 158 [2019-01-20 10:12:46,091 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-20 10:12:46,335 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:46,336 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:46,337 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:46,338 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:46,339 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:46,340 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:46,341 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:46,342 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:46,343 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:46,344 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 24 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 166 [2019-01-20 10:12:46,345 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-01-20 10:12:46,591 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:46,592 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:46,593 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:46,594 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:46,596 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:46,597 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:46,598 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:46,599 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:46,600 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:12:46,601 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 24 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 166 [2019-01-20 10:12:46,602 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-01-20 10:12:46,819 INFO L267 ElimStorePlain]: Start of recursive call 1: 18 dim-0 vars, 3 dim-1 vars, End of recursive call: 18 dim-0 vars, and 3 xjuncts. [2019-01-20 10:12:46,819 INFO L202 ElimStorePlain]: Needed 4 recursive calls to eliminate 21 variables, input treesize:329, output treesize:277 [2019-01-20 10:12:53,948 WARN L194 Executor]: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000) stderr output: (error "out of memory") [2019-01-20 10:12:54,149 WARN L521 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-20 10:12:54,151 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:621) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.SimplifyDDAWithTimeout.getRedundancy(SimplifyDDAWithTimeout.java:122) at de.uni_freiburg.informatik.ultimate.logic.simplification.SimplifyDDA$Simplifier.walk(SimplifyDDA.java:371) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:122) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:113) at de.uni_freiburg.informatik.ultimate.logic.simplification.SimplifyDDA.simplifyOnce(SimplifyDDA.java:650) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.SimplifyDDAWithTimeout.getSimplifiedTerm(SimplifyDDAWithTimeout.java:187) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.SmtUtils.simplify(SmtUtils.java:152) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:360) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:305) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheckSpWp$UnifyPostprocessor.postprocess(TraceCheckSpWp.java:575) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:439) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.IterativePredicateTransformer.computeStrongestPostconditionSequence(IterativePredicateTransformer.java:200) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:286) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:162) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceCheckConstructor.constructForwardBackward(TraceCheckConstructor.java:224) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceCheckConstructor.constructTraceCheck(TraceCheckConstructor.java:188) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceCheckConstructor.get(TraceCheckConstructor.java:165) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseTaipanRefinementStrategy.getTraceCheck(BaseTaipanRefinementStrategy.java:215) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseRefinementStrategy.checkFeasibility(BaseRefinementStrategy.java:223) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseRefinementStrategy.executeStrategy(BaseRefinementStrategy.java:197) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:70) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:456) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:434) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:376) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterate(TraceAbstractionStarter.java:334) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:126) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) Caused by: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: EOF at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1427) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:630) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:419) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:205) ... 45 more [2019-01-20 10:12:54,157 INFO L168 Benchmark]: Toolchain (without parser) took 159373.21 ms. Allocated memory was 141.0 MB in the beginning and 249.0 MB in the end (delta: 108.0 MB). Free memory was 108.5 MB in the beginning and 213.4 MB in the end (delta: -104.9 MB). Peak memory consumption was 3.1 MB. Max. memory is 7.1 GB. [2019-01-20 10:12:54,157 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.17 ms. Allocated memory is still 141.0 MB. Free memory is still 109.4 MB. There was no memory consumed. Max. memory is 7.1 GB. [2019-01-20 10:12:54,157 INFO L168 Benchmark]: Boogie Procedure Inliner took 58.86 ms. Allocated memory is still 141.0 MB. Free memory was 108.1 MB in the beginning and 106.0 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 7.1 GB. [2019-01-20 10:12:54,158 INFO L168 Benchmark]: Boogie Preprocessor took 32.44 ms. Allocated memory is still 141.0 MB. Free memory was 106.0 MB in the beginning and 104.7 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2019-01-20 10:12:54,158 INFO L168 Benchmark]: RCFGBuilder took 455.82 ms. Allocated memory is still 141.0 MB. Free memory was 104.3 MB in the beginning and 91.4 MB in the end (delta: 12.9 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. [2019-01-20 10:12:54,158 INFO L168 Benchmark]: TraceAbstraction took 158822.42 ms. Allocated memory was 141.0 MB in the beginning and 249.0 MB in the end (delta: 108.0 MB). Free memory was 91.4 MB in the beginning and 213.4 MB in the end (delta: -122.0 MB). There was no memory consumed. Max. memory is 7.1 GB. [2019-01-20 10:12:54,160 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 0.17 ms. Allocated memory is still 141.0 MB. Free memory is still 109.4 MB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 58.86 ms. Allocated memory is still 141.0 MB. Free memory was 108.1 MB in the beginning and 106.0 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 32.44 ms. Allocated memory is still 141.0 MB. Free memory was 106.0 MB in the beginning and 104.7 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 455.82 ms. Allocated memory is still 141.0 MB. Free memory was 104.3 MB in the beginning and 91.4 MB in the end (delta: 12.9 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 158822.42 ms. Allocated memory was 141.0 MB in the beginning and 249.0 MB in the end (delta: 108.0 MB). Free memory was 91.4 MB in the beginning and 213.4 MB in the end (delta: -122.0 MB). There was no memory consumed. 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...